CN104310571A - Method for purifying poisonous and harmful organic pollutants by using electromagnetic collaborative enhanced biological packed tower - Google Patents

Abstract

The invention discloses a device and method for purifying poisonous and harmful organic pollutants by using an electromagnetic collaborative enhanced biological packed tower, and belongs to the field of pollution control of difficultly treated high-concentration poisonous and harmful organic pollutants. The method for treating the poisonous and harmful organic pollutants, which is disclosed by the invention comprises the steps: domestication of a bactericide; preparation of reactor packing; biofilm formation of reactor packing; and treatment of poisonous and harmful organic pollutants. According to the method disclosed by the invention, the defect that the degradation efficiency is affected by concentrated falling easily caused by aging when the biofilm process runs are overcome by utilizing an electromagnetic collaborative technology; the bactericide with a rapid growth rate and high degradation efficiency of poisonous and harmful organic pollutants is cultured; meanwhile, the content of dissolved oxygen in a reactor system is improved, so that the mass transfer rate of matter in gas and liquid phases is enhanced, and thus the degradation reaction probability of the poisonous and harmful organic pollutants is increased, and the organic matter is fully purified.

Description

Method for purifying toxic and harmful organic pollutants by electromagnetic synergistically enhanced biological packing tower

technical field

The invention relates to a device and method for purifying toxic and harmful organic pollutants, especially a device and method for electromagnetic synergistic strengthening based on biological packing towers to treat toxic and harmful organic pollutants, which belongs to the pollution of refractory high-concentration toxic and harmful organic pollutants control field.

Background technique

Toxic and harmful organic pollutants mainly refer to organic pollutants with biological toxicity. They not only have obvious toxicity to organisms and humans, but also can cause acute and chronic poisoning. Some toxic substances can also cause cancer, teratogenicity and genetic mutation of cells. That is, the "three-to" effect. Most toxic and harmful organic pollutants are artificially synthesized organic substances. Because of their large molecules and stable structures, they are difficult to be degraded by microorganisms in the natural environment and have a long residual time. Therefore, they have long-term potential harm to the ecological environment and have attracted much attention. A class of pollutants. Therefore, it is very important to propose a low-cost short-process using biofilm to efficiently treat toxic, harmful, biochemically difficult, and high-concentration organic pollutants.

Patent CN 1745883A provides a method of using multi-stage immobilized microbial film filler to control odor pollution, especially the odor pollution emitted by petrochemical sewage treatment plants, and a method for purifying low-concentration organic waste gas. Although this method has the advantages of low operating cost, stable operation, impact resistance, and long operating cycle, it cannot be short-processed because it requires pretreatment; at the same time, it is difficult to achieve biodegradability for high-concentration organic waste gas. It has strict requirements on microorganisms; in addition, the treatment objects are limited to low-concentration organic waste gas and deodorization of odor sources, and it is difficult to treat pollutants in a broad spectrum.

Patent CN 201406362Y discloses a solid-carrying aerobic-anaerobic method and device for degrading toxic and harmful organic substances. This patent only uses aerobic anaerobic microorganisms to treat toxic and harmful pollutants, without considering the biochemical factors of pollutants; although the structure is simple, it increases the treatment process; in addition, this anaerobic-aerobic combined treatment method is similar to the A/O method .

Compared with physical and chemical methods, biological methods have the advantages of low investment, low operating costs, and no secondary pollution.

During biofilm treatment, the characteristics of biofilm are: when the anaerobic layer of the biofilm is not thick enough, it maintains a balanced and stable relationship with the aerobic layer, and the aerobic layer can maintain a good purification function; when the anaerobic layer When it is gradually thickened, the microorganisms in the inner layer enter the endogenous metabolism due to lack of sufficient nutrition. When these metabolites escape outward, they must pass through the aerobic layer, thus destroying the stability of the aerobic layer ecosystem. At the same time, the continuous escape of gaseous metabolites in the anaerobic layer weakens the fixation force of the biofilm on the carrier, promotes the shedding of the biofilm, loses its ability to adhere to the carrier, and falls off and flows out of the reactor with water. A new biofilm re-grows on the surface.

The operation principle of biofilm method in biological treatment has the following four points: ① slow down the aging process of biofilm; ② control the thickness of anaerobic film; ③ speed up the renewal of aerobic film; In order to achieve these four basic principles and at the same time fully treat toxic and harmful organic pollutants, the applicant applied the electromagnetic synergy technology to the biological packing tower to obtain a new way to solve the two problems.

Contents of the invention

Aiming at the defects of biological treatment technology and the characteristics of difficult treatment of toxic and harmful organic pollutants, the present invention provides a method for purifying toxic and harmful organic pollutants with electromagnetic synergistic enhanced biological packing tower. The device uses electromagnetic synergistic technology to strengthen the biological treatment of toxic and harmful organic Pollutant efficiency, realizing the effective degradation of toxic and harmful organic pollutants.

The inventive method carries out as follows:

(1) Domestication of strains

a. Domestication of wastewater treatment bacteria

Select the activated sludge of toxic and harmful organic wastewater to be treated as the initial strain, place the activated sludge in the culture device for aeration, add the diluted wastewater to be treated equal to the quality of the activated sludge, and the diluted wastewater to be treated is the wastewater to be treated It is prepared with distilled water at a volume ratio of 1:100, and nitrogen and phosphorus nutrient solutions are added at the same time, so that the mass ratio of BOD ₅ :N:P in the entire culture medium is 100~125:2~5:1; after that, replace it every two days The concentration of the diluted wastewater solution to be treated is increased sequentially, and the raw wastewater solution to be treated is added at the end to carry out continuous domestication of the bacteria; when the treated wastewater reaches the national discharge standard, and the OD600 of the bacteria solution in the culture device reaches 0.6~1 , that is, to obtain the strains required for the treatment of wastewater;

b. Domestication of waste gas treatment bacteria

Select coking wastewater activated sludge as the initial strain and place it in the culture device, and continuously pass the diluted waste gas to be treated into the culture device. The diluted waste gas to be treated is mixed with the waste gas to be treated and air at a volume ratio of 1:100 At the same time, add nitrogen and phosphorus nutrient solution, so that the mass ratio of BOD ₅ :N:P in the whole culture medium is 100~125:2~5:1; after that, replace the waste gas to be treated with increasing concentration every two days for continuous domestication , the concentration of waste gas to be treated is 1:90, 1:80, ... 1:30, 1:20, 1:10, 1:1 in turn; when the waste gas after treatment reaches the national emission standard, and the OD600 of the bacterial liquid in the culture device reaches 0.6~1, the bacteria needed to treat the waste gas can be obtained;

(2) Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the biological packing tower with a mass ratio of 0.1~1.5:0.1~3:1~3, and install paired electrodes in the biological packing tower. Can pass through alternating current, direct current or pulse current;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 0.1~5V, the current density is 1~40mA/cm ² , and the temperature of the wastewater and waste gas introduced is 20 ~50℃;

a. Bio-filling towers for wastewater treatment

Add the same volume of waste water to be treated in the bacteria required for treating waste water obtained in step (1), and add nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P is 100~125:2~5: 1 Make a film-hanging solution; pass the film-hanging solution from top to bottom into the biological packing tower for circulating film-hanging. During the film-hanging period, replace the film-hanging solution every two days, and at the same time expose the biological packing tower from bottom to top gas;

b. Film-hanging biological packing tower for waste gas treatment

Add the carbon, nitrogen, and phosphorus nutrient solution to the strains required to treat exhaust gas obtained in step (1), so that the mass ratio of C:N:P in the solution is 20~30:2~5:1 to make a film-hanging solution. The solution is passed into the bio-packed tower from top to bottom for circulating film-forming, and the film-forming solution is replaced every two days; at the same time, the mixed gas of waste gas to be treated and air with a volume ratio of 1:1 is passed into the bio-packed tower from bottom to top ;

Observe the growth of the bacterial film on the surface of the filler every day. When the treated wastewater or waste gas reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Treatment of toxic and harmful organic pollutants

The waste water or waste gas to be treated is passed into the biological packing tower from top to bottom, the temperature of the waste water and waste gas is 20~50℃, and the electrodes in the biological packing tower are energized at the same time, the applied voltage is 0.1~5V, and the current density is 1 ~40mA/cm ² , after the purification and degradation of the biological packing tower, the treated waste water or waste gas is obtained.

Toxic and harmful organic pollutants in the method of the present invention include toxic and harmful organic waste water and toxic and harmful organic waste gas. Fine chemical industry, preparation and manufacturing spraying, packaging and printing, semiconductor and electronic product manufacturing, leather, paint, metal manufacturing and other industrial waste gas.

The activated sludge of toxic and harmful organic wastewater to be treated refers to the sludge from primary sedimentation tanks of industrially treated raw wastewater.

The coking wastewater activated sludge is derived from the sludge in the primary sedimentation tank for industrial treatment of coking wastewater.

The magnetic filler is a permanent magnetic material filler and/or a soft magnetic material filler, the magnetic energy product of the magnetic filler is 0.6-59MGOe, the particle size of the filler is 100-8000μm, and the two fillers are mixed in any ratio.

The permanent magnetic filler is one or more of any ratio of NdFeB rare earth alloy, AlNiCo permanent magnet material, FeCrCo permanent magnet material, barium ferrite permanent magnet material and strontium ferrite permanent magnet material. mixture.

The soft magnetic material is one of pure iron, low carbon steel, iron-silicon alloy, iron-aluminum alloy, iron-silicon-aluminum alloy, nickel-iron alloy, iron-cobalt alloy, soft ferrite or a mixture of several in any ratio.

The micro-electrolytic filler material is one or more arbitrary ratio mixtures of iron-carbon filler material, iron-copper filler material, zinc-carbon filler material, aluminum-carbon filler material, magnesium-carbon filler material, and the particle size of the filler is 100~3000μm, the mixing mass ratio of the two raw materials in the filler material is 1.5~1:1.

The carrier filler is composed of a carrier and a cross-linking agent, wherein the carrier is one or more of activated carbon, peat, textiles, residues of plant stems and leaves, and plastics; the cross-linking agent is polyvinyl fluoride, alginate , calcium oxide, calcium hydroxide, etc., 1g of carrier filler contains 0.05~0.5g of crosslinking agent.

The method for purifying toxic and harmful organic pollutants by electromagnetic synergistic enhanced biological packing towers of the present invention uses electromagnetic synergistic technology to strengthen the biodegradation efficiency of biological packing towers, so that toxic and harmful organic pollutants can be fully purified, and the device used in the method includes a reactor body 1 1. A porous supporting plate 3, an air outlet valve 4 and a water inlet valve 5 are arranged above the reactor main body 1, a porous supporting plate 3 is arranged in the reactor main body 1, and more than one pair of paired electrodes 6 are arranged in the reactor main body 1 The lower part of the reactor main body 1 is provided with an inlet valve 7 and a backflush water valve 9, the backflush water valve 9 is arranged above the inlet valve 7, and the water outlet valve 8 is arranged at the bottom of the reactor main body 1, wherein the paired electrodes can be alternately connected in series The method is set in the main body of the reactor, and the porous support plate 3 is equipped with a mixture of magnetic fillers, micro-electrolytic fillers, and carrier fillers.

When the reactor of the present invention is in operation, the paired electrodes are connected to a constant AC or constant DC stabilized power supply, the applied voltage is 0.1-5V, the current density is 1-40mA/cm ² , and the electrodes are anti-corrosion electrodes such as coated titanium electrodes, plated Platinum electrodes, etc.

The reactor stuffing of the present invention is supplemented by the amount of 10%～12% every year.

The electromagnetic synergistic enhanced biological packing tower purification technology of toxic and harmful organic pollutants of the present invention is based on the following principles:

1) Electromagnetic enhanced biofilm treatment effect

Electromagnetic induction biofilm produces high degradation effect

Under the action of electric field and magnetic field, the potential difference between the inside and outside of the cell membrane of microorganisms increases. After the continuous action of the electromagnetic field of the biological packing tower, the pore size of the membrane pores on the cell membrane can be increased, so that the organic matter degrading enzymes produced in the cells can flow out smoothly, increasing the degradation. Enzyme production; at the same time, it also makes it easier for microorganisms to absorb nutrients and toxic and harmful organic pollutants, thereby greatly improving the degradation efficiency of biofilms on organic matter;

Electromagnetic optimization of biofilm performance

After the anaerobic layer in the biofilm of the biological packing tower absorbs organic matter, it decomposes and releases electrons and protons under the action of microorganisms in the anaerobic layer. The potential difference between fillers accelerates the mass transfer speed of electrons and protons, thereby accelerating the biological oxidation rate of the aerobic layer of the biofilm; at the same time, when the electrons are driven, they combine with dissolved oxygen and nutrients to make O ₂ ^.- And nutrients can be transferred deeper to the inner biofilm, so that even if the anaerobic layer expands with the treatment time, it can maintain a balance and stability with the aerobic layer of the biofilm, and also slow down the aging process of the biofilm;

Due to the current magnetic effect generated after the electrodes are energized, a micro-electric field is generated. The micro-electric field and micro-magnetic field make the particles in the reactor packing be in a constant micro-oscillating motion, so that the physical contact between the packing particles will not be too close, and the particles will be loaded on the packing particles. When the biofilm loaded on the filler particles ages to a certain extent and falls off, it can ensure that the biofilm does not fall off in blocks; because the farther away from the electrode, the smaller the magnetic field strength, the microparticles The smaller the vibration force, the slower the aging biofilm will fall off, which can ensure that the biofilm in the reactor does not fall off concentratedly, so as to ensure that the biological treatment efficiency remains at the highest level.

2) Mass transfer efficiency of the electromagnetic acceleration reactor system

Oxygen is a typical paramagnetic gas. After the electrodes are energized, the magnetic field of the reactor is enhanced, so that the solubility of oxygen in the liquid phase is improved, thereby enhancing the oxidation treatment effect of the system on pollutants;

After the organic matter enters the biological packing tower system, during the process of the organic matter passing through the gas film and liquid film and being absorbed by the biofilm, the electric field and the electrons in the system act on the organic matter, making it carry unpaired electrons, thereby generating paramagnetism, making the organic matter in the system The mass transfer rate has been greatly improved, and the probability of reacting with oxygen and degrading enzymes has become greater, so that the reaction can be more thorough, and toxic and harmful organic pollutants can be fully purified.

Advantages and effects of the present invention are as follows:

The invention utilizes the electromagnetic synergy technology to solve the defect that the aging of the biofilm method is easy to cause concentrated shedding and affect the degradation efficiency; at the same time, it also cultivates a bacterial agent with a fast growth rate and a high efficiency of degrading toxic and harmful organic pollutants;

The device of the present invention uses electromagnetic technology to increase the dissolved oxygen content in the reactor system, so that the mass transfer rate of the substance in the gas-liquid phase is improved, thereby increasing the probability of organic matter degradation reaction and being fully purified.

Description of drawings

Fig. 1 is the structural representation that realizes method device of the present invention;

In the figure: 1 is the main body of the reactor; 2 is the packing of the reactor; 3 is the porous support plate; 4 is the air outlet valve; 5 is the water inlet valve; 6 is the paired electrodes; 7 is the inlet valve; 8 is the water outlet valve; 9 is a recoil water valve.

Detailed ways

The present invention will be described in further detail below through the accompanying drawings and examples, but the protection scope of the present invention is not limited to the content described.

Embodiment 1: Electromagnetic synergy strengthens the method for purifying toxic and harmful organic pollutants in a biological packing tower. The specific operations are as follows:

1. Coking wastewater is industrial wastewater containing a large amount of refractory organic pollutants. Its composition is complex, containing a large amount of toxic and harmful substances such as phenol, cyanide, benzene, ammonia nitrogen, etc. The coking wastewater discharged beyond the standard will cause serious pollution to the environment. Coking wastewater has the characteristics of large changes in water quality and quantity, complex components, high content of organic matter, especially refractory organic matter, and high concentration of ammonia nitrogen. Coking wastewater is industrial wastewater containing volatile phenols, polycyclic aromatic hydrocarbons, and heterocyclic compounds such as oxygen, sulfur, and nitrogen produced during the high-temperature dry distillation, purification, and by-product recovery processes of coking and gas. The water quality of coking wastewater is a kind of high CODcr, high phenol A kind of industrial organic wastewater with high value, high ammonia nitrogen and difficult to treat.

2. In this example, the coking wastewater _of a certain coking plant is treated. The design capacity of _the reactor of the device of the present invention is Q=350m ³ /d. 280~310mg/L, phenol 700~800mg/L, cyanide 25~40mg/L.

The device used in this embodiment comprises a reactor main body 1 and a porous supporting plate 3, an air outlet valve 4 and a water inlet valve 5 are arranged above the reactor main body 1, a porous supporting plate 3 is arranged in the reactor main body 1, and the reactor main body 1 is equipped with 8 pairs of paired electrodes 6; the lower part of the reactor body 1 is equipped with an inlet valve 7 and a backflush water valve 9, the backflush water valve 9 is arranged above the inlet valve 7, and the outlet valve 8 is arranged on the reactor body 1 At the bottom, the paired electrodes are arranged in the main body of the reactor at intervals of 20 cm in series and alternately, and the porous support plate 3 is equipped with reactor packing; since the waste water is treated, the backflush water valve 9 and the air outlet valve 4 are in a closed state ; The reactor is 6m high, and the filling height of the reactor packing 2 is 3.3m (see Figure 1).

3. The specific implementation method of this embodiment is as follows:

(1) Select the activated sludge in the coking wastewater storage tank of the coking plant as the initial strain, place the activated sludge in the culture device for aeration, add the diluted coking wastewater equal to the quality of the activated sludge to be treated, The diluted coking waste water to be treated is prepared with waste water to be treated and distilled water at a volume ratio of 1:100. At the same time, urea and disodium hydrogen phosphate are added to make nitrogen and phosphorus nutrient solution, so that the quality of BOD ₅ :N:P in the whole culture medium The ratio is 100:5:1; after that, the diluted waste water solution to be treated is replaced every two days with successively higher concentrations, and the stock solution of waste water to be treated is added at the end to carry out continuous domestication of the bacteria; when the treated waste water reaches the national discharge standard, And when the OD600 of the bacterial liquid in the culture device reaches 0.8, the bacterial species required for the treatment of coking wastewater can be obtained;

(2) Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the biological packing tower with a mass ratio of 1:2:1, and install a pair of electrodes in the biological packing tower, in which the magnetic filler is FeCrCo permanent Magnetic material, the magnetic energy product of the magnetic filler is 0.6MGOe, the particle size of the filler is 8000μm; the micro-electrolytic filler is iron-carbon filler material, the particle size of the filler is 1200μm, the mass ratio of iron and carbon in the filler material is 1.5:1; the carrier filler is calcium oxide. As a joint agent, add 0.5g calcium oxide to 1g of activated carbon and mix the two to obtain carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 1.5V, the current density is 20mA/cm ² , and the temperature of the waste water is 30°C;

Add the same volume of untreated coking wastewater to the bacterial strains obtained in step (1) to treat coking wastewater, and add urea and disodium hydrogen phosphate to make nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P Make the membrane-hanging solution for 100:5:1; the membrane-hanging solution is passed into the biological packing tower from top to bottom to carry out circulation membrane-hanging, and the membrane-hanging solution is replaced every two days during the membrane-hanging period, and simultaneously bottom-up The biological packing tower is aerated; the growth of the bacterial film on the surface of the packing is observed every day. When the treated wastewater reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Treatment of coking wastewater

At normal temperature, close the water outlet valve 8, and input the coking waste water from the water inlet valve 7 into the reactor main body 1. The pH of the incoming water does not need to be adjusted. After the incoming water fills the reactor main body, the input is stopped and the eight pairs of coated titanium electrodes 6 are constantly connected. DC voltage stabilizer with a voltage of 1.5V and a current density of 20mA/cm ² . After the wastewater reacts in the reactor for 60 minutes, open the outlet valve 8 to discharge the water. At the same time, continue to input coking wastewater. The amount of water input is controlled at 0.2 ~ 0.25m ³ /min, the contact time of wastewater in the reactor is 90min.

The water quality of coking wastewater treated in this example is: COD _Cr 98~100mg/L, NH ₃ -N 7~10mg/L, phenol 0.2~0.3 mg/L, cyanide 0.1~0.3mg/L . Both COD _Cr and NH ₃ -N in the effluent have reached the first-level standard of the "Integrated Wastewater Discharge Standard".

Embodiment 2: Electromagnetic synergy strengthens the method for purifying toxic and harmful organic pollutants in biological packing towers. The specific operations are as follows:

1. The treatment object of this embodiment is the same as the coking wastewater in embodiment 1, and the structure of the biological packing tower is also the same.

2. The specific implementation method of this embodiment is as follows:

(1) Select the activated sludge in the coking wastewater storage tank of the coking plant as the initial strain, place the activated sludge in the culture device for aeration, add the diluted coking wastewater equal to the quality of the activated sludge to be treated, The diluted coking waste water to be treated is prepared with waste water to be treated and distilled water at a volume ratio of 1:100. At the same time, urea and disodium hydrogen phosphate are added to make nitrogen and phosphorus nutrient solution, so that the quality of BOD ₅ :N:P in the whole culture medium The ratio is 100:2:1; after that, the diluted wastewater solution to be treated is replaced every two days with successively higher concentrations, and the stock solution of wastewater to be treated is added at the end to carry out continuous domestication of the bacteria; when the treated wastewater reaches the national discharge standard, And when the OD600 of the bacterial solution in the culture device reaches 1, the bacterial species required for the treatment of coking wastewater can be obtained;

(2) Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the biological packing tower with a mass ratio of 0.1:0.1:1, and install paired electrodes in the biological packing tower, wherein the magnetic filler is barium ferrite Permanent magnetic material, the magnetic energy product of the magnetic filler is 59MGOe, the filler particle size is 100μm; the micro-electrolytic filler is aluminum-carbon filler material, the filler particle size is 3000μm, the mass ratio of aluminum and carbon in the filler material is 1:1; the carrier filler is alginate As a crosslinking agent, add 0.05g of alginate to 1g of activated carbon and mix the two to obtain a carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 5V, the current density is 1mA/cm ² , and the temperature of the waste water is 50°C;

Add the same volume of untreated coking wastewater to the bacterial strains obtained in step (1) to treat coking wastewater, and add urea and disodium hydrogen phosphate to make nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P Make the membrane-hanging solution for 100:2:1; the membrane-hanging solution is passed into the biological packing tower from top to bottom to carry out circulation membrane-hanging, and the membrane-hanging solution is replaced every two days during the membrane-hanging period, and simultaneously bottom-up The biological packing tower is aerated; the growth of the bacterial film on the surface of the packing is observed every day. When the treated wastewater reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Treatment of coking wastewater

At normal temperature, close the water outlet valve, and input the coking waste water from the water inlet valve into the main body of the reactor. The pH of the incoming water does not need to be adjusted. After the water is filled with the main body of the reactor, the input is stopped and the eight pairs of coated titanium electrodes are connected to a constant AC stabilized voltage. , the voltage is 5V, the current density is 0.1mA/cm ² , the waste water is reacted in the reactor for 90 minutes, and then the outlet valve is opened to discharge the water, while the coking waste water is continuously input, and the amount of incoming water is controlled at 0.2 ~ 0.25m ³ /min. The contact time in the reactor was 90 min.

The water quality of coking wastewater treated in this example is: COD _Cr 90~95mg/L, NH ₃ -N 8~9mg/L, phenol 0.1~0.3 mg/L, cyanide 0.1~0.2mg/L . Both COD _Cr and NH ₃ -N in the effluent have reached the first-level standard of the "Integrated Wastewater Discharge Standard".

Embodiment 3: Electromagnetic synergy strengthens the method for purifying toxic and harmful organic pollutants in biological packing towers. The specific operations are as follows:

1. Printing and dyeing wastewater contains dyes, auxiliaries, oil agents, acids and bases, fiber impurities and inorganic salts, etc. It has the characteristics of large water volume, high chroma, strong alkalinity, and high organic content, and is an important source of water environmental pollution. With the development of modern printing and dyeing technology, a large number of new printing and dyeing auxiliaries, dyes, PVA sizing and other difficult-to-biodegradable organic substances are widely used in the printing and dyeing industry, resulting in enhanced stability of dyes in printing and dyeing wastewater, and organic components are becoming more and more complex. The B/C ratio decreases and the biodegradability decreases.

The amount of desizing wastewater in printing and dyeing wastewater is small, but the concentration of pollutants is high, which contains various sizes, size decomposition products, fiber scraps, starch alkali and various additives. The wastewater is alkaline, with a pH value of about 12. The sizing is mainly starch (such as cotton cloth) desizing wastewater, in which the COD and BOD values are high, and the biodegradability is good; the sizing is mainly polyvinyl alcohol (PVA) (such as polyester-cotton warp yarn) desizing wastewater has high COD and low BOD, and the biodegradability of wastewater is poor.

2. This embodiment is aimed at the treatment of desizing wastewater mainly composed of polyvinyl alcohol (PVA) in a printing and dyeing factory. The designed treatment capacity of the device reactor of the present invention is Q=120m ³ /d, and the water quality of desizing wastewater: COD _Cr It is 4300~4500mg/L, PVA is 1500~1700mg/L, and the chroma is 250 times.

The device used in this embodiment comprises a reactor main body 1 and a porous supporting plate 3, an air outlet valve 4 and a water inlet valve 5 are arranged above the reactor main body 1, a porous supporting plate 3 is arranged in the reactor main body 1, and the reactor main body 1 is provided with 5 pairs of paired electrodes 6; the lower part of the reactor body 1 is provided with an inlet valve 7 and a backflush water valve 9, the backflush water valve 9 is arranged above the inlet valve 7, and the outlet valve 8 is arranged on the reactor body 1 At the bottom, the electrodes are arranged in the main body of the reactor at an interval of 18 cm in series and alternately, and the porous support plate 3 is equipped with reactor filler; since the waste water is treated, the backflush water valve 9 and the air outlet valve 4 are in a closed state; The height of the reactor is 4m, and the filling height of the reactor packing 2 is 2m.

3. The specific implementation method of this embodiment is as follows:

(1) Select the activated sludge in the storage tank of the desizing wastewater retained by the printing and dyeing plant as the initial strain, place the activated sludge in the culture device for aeration, and add the diluted coking Waste water, the diluted coking waste water to be treated is prepared with waste water to be treated and distilled water with a volume ratio of 1:100, and ammonium phosphate is added to make nitrogen and phosphorus nutrient solution simultaneously, so that the mass ratio of BOD ₅ :N:P in the whole culture medium is 110:4:1; After that, replace the diluted wastewater solution to be treated with increasing concentration every two days, and finally add the raw wastewater to be treated to continuously domesticate the bacteria; when the treated wastewater reaches the national discharge standard, and cultivate When the OD600 of the bacterial solution in the device reaches 0.7, the bacteria required for the treatment of wastewater will be obtained;

(2) Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the biological packing tower with a mass ratio of 1.2:1:2.6, and install paired electrodes in the biological packing tower, in which the magnetic filler iron-silicon aluminum alloy and Alnico permanent magnet alloy is prepared with a mass ratio of 15:1, the magnetic energy product of the magnetic filler is 36MGOe, and the particle size of the filler is 3200μm; the micro-electrolytic filler is zinc-carbon filler material, the particle size of the filler is 1500μm, and the mass of zinc and carbon in the filler material The ratio is 1.7:1; the carrier filler uses sodium alginate as a cross-linking agent, and the ratio of adding 0.1g sodium alginate to 1g of activated carbon is mixed to obtain the carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 2V, the current density is 30mA/cm ² , and the temperature of the wastewater is 20°C;

Add the same volume of waste water to be treated to the bacteria required for treating waste water obtained in step (1), and add ammonium phosphate to make nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P is 110:4:1 Make a film-hanging solution; pass the film-hanging solution from top to bottom into the bio-packed tower for circulating film-hanging. During the film-hanging period, replace the film-hanging solution every two days, and at the same time aerate the bio-packed tower from bottom to top ; Observe the growth of the bacterial film on the surface of the filler every day. When the treated wastewater reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) At room temperature, close the water outlet valve 8, and input the coking waste water from the water inlet valve 7 into the reactor main body 1. The pH of the inlet water does not need to be adjusted. After the reactor is filled with water, the input is stopped and the five pairs of coated titanium electrodes are connected. Constant AC stabilized voltage, the voltage is 2V, the current density is 30mA/cm ² , the waste water is reacted in the reactor for 90 minutes and then the water outlet valve 8 is opened to discharge the water, and the waste water is continuously input at the same time ^. min, the contact time of wastewater in the reactor is 150min;

After the treatment in this embodiment, various organic pollutants such as dyes, auxiliary agents, oil agents and inorganic salts are effectively degraded, and the water quality of the desizing wastewater after treatment is: COD _Cr is 210 ~ 217mg/L, PVA is 68~73mg/L, chromaticity is 25 times.

Embodiment 4: Electromagnetic synergy strengthens the method for purifying toxic and harmful organic pollutants in biological packing towers. The specific operations are as follows:

1. The processing object of this embodiment is the same as that of Embodiment 3, and the structure of the biological packing tower is also the same.

2. The specific implementation method of this embodiment is as follows:

(1) Select the activated sludge in the storage tank of the desizing wastewater retained by the printing and dyeing plant as the initial strain, place the activated sludge in the culture device for aeration, and add the diluted coking Wastewater, the diluted coking wastewater to be treated is formulated with wastewater to be treated and distilled water with a volume ratio of 1:100, and ammonium phosphate is added to make nitrogen and phosphorus nutrient solution simultaneously, so that the mass ratio of BOD ₅ :N:P in the whole culture medium is 125:5:1; after that, replace the diluted wastewater solution to be treated with increasing concentration every two days, and finally add the raw wastewater to be treated to continuously acclimatize the bacteria; when the treated wastewater reaches the national discharge standard, and cultivate When the OD600 of the bacterial liquid in the device reaches 0.6, the bacterial species required for wastewater treatment can be obtained;

(2) Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the biological packing tower with a mass ratio of 1.5:3:2, and install a pair of electrodes in the biological packing tower, wherein the magnetic filler is an iron-cobalt alloy, The magnetic energy product of the magnetic filler is 0.6MGOe, and the filler particle size is 8000μm; the micro-electrolytic filler is iron-copper filler material, the filler particle size is 100μm, and the mass ratio of iron and copper in the filler material is 1.5:1; the carrier filler uses calcium hydroxide as a crosslinking agent , according to the ratio of 0.3g calcium hydroxide added to 1g textile, the two are mixed to obtain carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 0.1V, the current density is 40mA/cm ² , and the temperature of the waste water is 20°C;

Add the same volume of waste water to be treated in the bacteria required for treating waste water obtained in step (1), and add ammonium phosphate to make nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P is 125:5:1 Make a film-hanging solution; pass the film-hanging solution from top to bottom into the biological packing tower for circulating film-hanging. During the film-hanging period, replace the film-hanging solution every two days, and at the same time aerate the biological packing tower from bottom to top ; Observe the growth of the bacterial film on the surface of the filler every day. When the treated wastewater reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) At room temperature, close the outlet valve, and input the coking wastewater from the inlet valve into the main body of the reactor. The pH of the inlet water does not need to be adjusted. After the reactor is filled with water, the input is stopped and the five pairs of coated titanium electrodes are connected to a constant current for a stable Piezoelectric, the voltage is 0.1V, the current density is 40mA/cm ² , the waste water is reacted in the reactor for ¹²⁰ minutes, then the outlet valve is opened to discharge the water, and the waste water is continuously input at the same time. The contact time in the reactor is 120min;

After the treatment of this embodiment, various organic pollutants such as dyes, auxiliary agents, oil agents and inorganic salts are effectively degraded, and the water quality of the desizing wastewater after treatment is: COD _Cr is 230 ~ 234mg/L, PVA is 60~63mg/L, the color is 26 times.

Example 5: Electromagnetic synergistic enhancement of biological packing tower purification and spraying to produce organic waste gas, the specific operation is as follows:

Air pollution is one of the most prominent environmental problems in my country at present, and the industrial waste gas emitted by various production enterprises is an important source of air pollutants. Volatile organic compounds (VOCs) emitted by industries such as furniture, spraying, shoemaking, printing, electronics and materials, including benzene series, esters, polycyclic aromatic hydrocarbons, aldehydes, ketones, alcohols, halogenated hydrocarbons, organic sulfides and Chloride, etc., the pollution of the environment has become a prominent problem. A large amount of industrial organic waste gas is discharged into the atmosphere, which reduces the quality of the atmospheric environment, brings serious harm to human health, and causes huge losses to the national economy.

Organic waste gas is generally flammable and explosive, toxic and harmful, insoluble in water, soluble in organic solvents, and difficult to treat. At present, the methods of organic waste gas treatment mainly include: adsorption, condensation, combustion, catalytic combustion, biological oxidation and so on. However, the existing technology has certain limitations in technology and economy in the treatment of complex industrial organic waste gas, such as difficult regeneration of adsorbents, clogging, easy poisoning of catalysts, difficulty in microbial cultivation, narrow adaptability, and high operating costs.

1. In this example, the waste gas from spraying production in a certain spraying factory is treated. The concentration of the main toxic and harmful organic waste gas is: toluene 150~250mg/m ³ , methyl ethyl ketone 100~300mg/m ³ , acetone 150~300mg/m ³ , Butyl acetate 200~300mg/m ³ , ethyl acetate 200~400mg/m ³ , air volume 5000~8000m ³ /h, temperature 40~60℃.

The device of this embodiment includes an air outlet valve 4 and a water inlet valve 5 above the reactor main body 1; a porous supporting plate 3 is arranged in the reactor main body 1, and a reactor packing 2 is installed on the porous supporting plate 3; the reactor main body Nine pairs of platinum-plated electrodes 6 are set in 1; inlet valve 7, water outlet valve 8 and backwash water valve 9 are set below the reactor main body 1; wherein the electrode pairs are arranged in the reactor main body at intervals of 15 cm in series and alternately; If the waste gas is being processed, the backwash water valve 9 is in a closed state. The reactor device is 4m high, and the filling height of the reactor is 2.6m.

2. The specific method of use of the present invention is as follows:

(1) Select the activated sludge from the primary sedimentation tank of the coking wastewater treatment plant as the strain, and place it in the culture device, and continuously pass the diluted waste gas to be treated into the culture device. The air is mixed at a volume ratio of 1:100, and ammonium phosphite is added as a nitrogen and phosphorus nutrient solution, so that the mass ratio of BOD ₅ :N:P in the entire culture medium is 115:5:1; after that, the concentration is changed every two days The waste gas to be treated is gradually acclimated successively, and the concentration of the waste gas to be treated is 1:90, 1:80, ... 1:30, 1:20, 1:10, 1:1; when the treated waste gas reaches the national emission standard, And when the OD600 of the bacterial liquid in the culture device reaches 0.9, the bacteria required for the treatment of waste gas will be obtained;

Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the reactor at a ratio of 1:1.2:2.5. The magnetic filler is made of strontium ferrite permanent magnet material and nickel-iron alloy with a mass ratio of 8:1. The magnetic filler The magnetic energy product is 50MGOe, the particle size of the filler is 6000μm, the micro-electrolytic filler is composed of aluminum-carbon filler material, the particle size of the filler is 1200μm, the mass ratio of aluminum to carbon in the filler is 1.2:1; the carrier filler uses polyvinyl fluoride as a crosslinking agent, Add 0.05g of polyvinyl fluoride to 1g of activated carbon and mix the two to obtain carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 1.5V, the current density is 20mA/cm ² , and the temperature of the exhaust gas is 45°C;

Ammonium phosphite is added to the strains required for the treatment of exhaust gas obtained in step (1) as a carbon nitrogen phosphorus nutrient solution, so that the mass ratio of C:N:P in the solution is 30:5:1 to make a film-hanging solution, and the The solution is passed into the bio-packed tower from top to bottom for circulating film-forming, and the film-forming solution is replaced every two days; at the same time, the mixed gas of waste gas to be treated and air with a volume ratio of 1:1 is passed into the bio-packed tower from bottom to top ;Observe the growth of the bacterial film on the surface of the filler every day. When the exhaust gas after treatment reaches the national emission standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Treatment of spraying exhaust gas

At normal temperature, close the water outlet valve 8, input the exhaust gas from the inlet valve 7 into the reactor, and connect a constant DC voltage regulator to the electrode pair, the voltage is 1.5V, the current density is 20mA/cm ² , the purified exhaust gas Discharge from outlet valve 4;

After the treatment in this example, the average discharge solubility of toxic and harmful organic waste gas from the spraying production plant after treatment is: toluene 9~11mg/m ³ , butanone 0.5~0.7mg/m ³ , acetone 0.4~0.6mg/m ³ , butyl acetate 1.9~2.3mg/m ³ , ethyl acetate 1.8~2.3mg/m ³ .

Embodiment 6: Electromagnetic synergistic strengthening of biological packing tower to purify organic waste gas from semiconductor production, the specific operation is as follows:

1. The processing object of this embodiment is the same as that of Embodiment 5, and the structure of the biological packing tower is also the same.

2. The specific method of use of the present invention is as follows:

(1) Select the activated sludge from the primary sedimentation tank of the coking wastewater treatment plant as the strain, and place it in the culture device, and continuously pass the diluted waste gas to be treated into the culture device. The air is mixed at a volume ratio of 1:100, and ammonium phosphite is added as a nitrogen and phosphorus nutrient solution, so that the mass ratio of BOD ₅ :N:P in the entire culture medium is 115:3:1; after that, the concentration is changed every two days The waste gas to be treated is continuously domesticated in increasing order, and the concentration of the waste gas to be treated is 1:90, 1:80, ... 1:30, 1:20, 1:10, 1:1; when the treated waste gas reaches the national emission standard, And when the OD600 of the bacterial liquid in the culture device reaches 1, the bacteria required for the treatment of waste gas will be obtained;

Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the reactor at a ratio of 0.1:3:3, wherein the magnetic filler is made of iron-chromium-cobalt permanent magnetic material and soft ferrite at a mass ratio of 1:4. The magnetic energy product of the filler is 20MGOe, the particle size of the filler is 2000μm, the micro-electrolytic filler is composed of magnesium-carbon filler material, the particle size of the filler is 800μm, the mass ratio of magnesium to carbon in the filler is 1:1; the carrier filler uses polyvinyl fluoride as a crosslinking agent , according to the ratio of 1g activated carbon to 0.25g polyvinyl fluoride, the two are mixed to obtain a carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 2V, the current density is 25mA/cm ² , and the temperature of the exhaust gas is 35°C;

Ammonium phosphite is added to the bacterial strains required for the treatment of waste gas obtained in step (1) as a carbon nitrogen phosphorus nutrient solution, so that the mass ratio of C:N:P in the solution is 20:2:1 to make a film-hanging solution, and the The solution is passed into the bio-packed tower from top to bottom for circulating film-forming, and the film-forming solution is replaced every two days; at the same time, the mixed gas of waste gas to be treated and air with a volume ratio of 1:1 is passed into the bio-packed tower from bottom to top ;Observe the growth of the bacterial film on the surface of the filler every day. When the exhaust gas after treatment reaches the national emission standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Treatment of spraying exhaust gas

At normal temperature, close the water outlet valve 8, input the exhaust gas from the inlet valve 7 into the reactor, and connect the electrode pair with a constant DC stabilized voltage, the voltage is 2V, the current density is 25mA/cm ² , the purified exhaust gas from The air outlet valve 4 discharges;

After the treatment in this example, the average discharge solubility of toxic and harmful organic waste gas from the spraying production plant after treatment is: toluene 15~18mg/m ³ , butanone 0.6~0.9mg/m ³ , acetone 0.6~0.7mg/m ³ , butyl acetate 3~3.8mg/m ³ , ethyl acetate 1.8~2mg/m ³ .

Example 7: Electromagnetic synergistic strengthening of biological packing towers to purify organic waste gas from semiconductor production, the specific operations are as follows:

1. In this embodiment, the organic waste gas produced by a semiconductor factory is treated. The concentration of the main toxic and harmful organic waste gas is: xylene 150-250 mg/m ³ , methyl ethyl ketone 100-300 mg/m ³ , acetone 150-300 mg/m ³ , Butyl acetate 200~400mg/m ³ , air volume 3000~5000m ³ /h, temperature 30~50℃.

The device of the present invention comprises that an air outlet valve 4 and a water inlet valve 5 are arranged above the reactor main body 1; a porous support plate 3 is arranged in the reactor main body 1, and a reactor filler 2 is housed on the porous support plate 3; the reactor main body 1 Six pairs of platinum-plated electrodes 6 are arranged in the middle; the inlet valve 7, the water outlet valve 8 and the backflush water valve 9 are arranged under the reactor main body 1; wherein the electrode pairs are arranged in the reactor main body at intervals of 15 cm in series and alternately; To treat exhaust gas, the backwash water valve 9 is in a closed state. The reactor is 3 m high and the reactor packing is packed to a height of 1.8 m.

2. The specific method of use of the present invention is as follows:

Select the activated sludge from the primary sedimentation tank of the coking wastewater treatment plant as the strain, and place it in the culture device, and continuously pass the diluted waste gas to be treated into the culture device. The volume ratio of 100 is mixed. At the same time, urea and ammonium phosphate are added to make nitrogen and phosphorus nutrient solution, so that the mass ratio of BOD ₅ :N:P in the entire culture medium is 125:2:1; The waste gas to be treated is continuously domesticated, and the concentration of the waste gas to be treated is 1:90, 1:80, ... 1:30, 1:20, 1:10, 1:1; when the treated waste gas reaches the national emission standard, and the cultivation device When the OD600 of the bacterial solution reaches 0.8, the bacteria needed to treat the waste gas will be obtained;

Fill the magnetic filler, micro-electrolytic filler, and carrier filler into the reactor at a ratio of 0.5:2:1. The magnetic filler is made of pure iron and nickel-aluminum-cobalt permanent magnet alloy at a mass ratio of 12:1. The magnetic energy product of the magnetic filler is It is 40MGOe, the particle size of the filler is 4000μm, the micro-electrolytic filler is composed of iron-carbon filler material, the particle size of the filler is 1400μm, the mass ratio of iron to carbon in the filler is 1:1; The proportion of 0.3g calcium oxide is mixed to make carrier filler;

(3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 3V, the current density is 15mA/cm ² , and the temperature of the exhaust gas is 45°C;

Add urea and ammonium phosphate to the strains required to treat waste gas obtained in step (1) to make a carbon, nitrogen, and phosphorus nutrient solution, so that the mass ratio of C:N:P in the solution is 25:3:1 to make a film-hanging solution. The solution is passed into the biological packing tower from top to bottom to carry out circulating film formation, and the film formation solution is replaced every two days; at the same time, a mixture of waste gas to be treated and air with a volume ratio of 1:1 is introduced into the biological packing tower from bottom to top Gas; Observe the growth of the bacterial film on the surface of the filler every day. When the exhaust gas after treatment reaches the national emission standard and the microbial film grows well and the film is stable and does not fall off, the film is completed;

(4) Semiconductor waste gas treatment

At normal temperature, close the water outlet valve 8, input the waste gas from the water inlet valve 7 into the reactor, and pass a constant AC pulse current to the electrode pair with a voltage of 3V and a current density of 15mA/cm ² , and the purified waste gas from the outlet Valve 4 discharge;

After the treatment in this example, the average discharge solubility of toxic and harmful organic waste gas from semiconductor production plants after treatment is: xylene 5.8~6.2mg/m ³ , methyl ethyl ketone 4.5~4.7mg/m ³ , acetone 5.4~5.6mg/m 3 m ³ , butyl acetate 1.9~2.3mg/m ³ .

Claims (6)

1. An electromagnetic synergistically strengthened method for purifying toxic and harmful organic pollutants in a biological packing tower, is characterized in that it is carried out as follows: (1) Domestication of strains a. Domestication of wastewater treatment bacteria Select the activated sludge of toxic and harmful organic wastewater to be treated as the initial strain, place the activated sludge in the culture device for aeration, add the diluted wastewater to be treated equal to the quality of the activated sludge, and the diluted wastewater to be treated is the wastewater to be treated It is prepared with distilled water at a volume ratio of 1:100, and nitrogen and phosphorus nutrient solutions are added at the same time, so that the mass ratio of BOD ₅ :N:P in the entire culture medium is 100~125:2~5:1; after that, replace it every two days The concentration of the diluted wastewater solution to be treated is increased sequentially, and the raw wastewater solution to be treated is added at the end to carry out continuous domestication of the bacteria; when the treated wastewater reaches the national discharge standard, and the OD600 of the bacteria solution in the culture device reaches 0.6~1 , that is, to obtain the strains required for the treatment of wastewater; b. Domestication of waste gas treatment bacteria Select coking wastewater activated sludge as the initial strain and place it in the culture device, and continuously pass the diluted waste gas to be treated into the culture device. The diluted waste gas to be treated is mixed with the waste gas to be treated and air at a volume ratio of 1:100 At the same time, add nitrogen and phosphorus nutrient solution, so that the mass ratio of BOD ₅ :N:P in the whole culture medium is 100~125:2~5:1; after that, replace the waste gas to be treated with increasing concentration every two days for continuous domestication , the concentration of the exhaust gas to be treated is 1:90, 1:80, ..., 1:30, 1:20, 1:10, 1:1; when the exhaust gas after treatment reaches the national emission standard, and the OD600 of the bacterial liquid in the culture device When it reaches 0.6~1, the bacteria needed to treat the waste gas will be obtained; (2) Fill the magnetic filler, micro-electrolytic filler and carrier filler into the biological packing tower with a mass ratio of 0.1~1.5:0.1~3:1~3, and install more than one pair of electrode; (3) Perform film-hanging treatment on the biological packing tower, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 0.1~5V, the current density is 1~40mA/cm ² , and the temperature of the wastewater and waste gas introduced is 20 ~50℃; a. Bio-filling towers for wastewater treatment Add the same volume of waste water to be treated in the bacteria required for treating waste water obtained in step (1), and add nitrogen and phosphorus nutrient solution, so that the mass ratio of solution BOD ₅ :N:P is 100~125:2~5: 1 Make a film-hanging solution; pass the film-hanging solution from top to bottom into the biological packing tower for circulating film-hanging. During the film-hanging period, replace the film-hanging solution every two days, and at the same time expose the biological packing tower from bottom to top gas; b. Film-hanging biological packing tower for waste gas treatment Add the carbon, nitrogen, and phosphorus nutrient solution to the strains required to treat exhaust gas obtained in step (1), so that the mass ratio of C:N:P in the solution is 20~30:2~5:1 to make a film-hanging solution. The solution is passed into the bio-packed tower from top to bottom for circulating film-forming, and the film-forming solution is replaced every two days; at the same time, the mixed gas of waste gas to be treated and air with a volume ratio of 1:1 is passed into the bio-packed tower from bottom to top ; Observe the growth of the bacterial film on the surface of the filler every day. When the treated wastewater or waste gas reaches the national discharge standard and the microbial film grows well and the film is stable and does not fall off, the film is completed; (4) Treatment of toxic and harmful organic pollutants Pass the waste water or waste gas to be treated into the biological packing tower, the temperature of the waste water and waste gas is 20~50°C, and at the same time energize the electrodes in the biological packing tower, the applied voltage is 0.1~5V, and the current density is 1~40mA/cm ^2. After the purification and degradation of the biological packing tower, the treated waste water or waste gas is obtained. 2. The method for purifying toxic and harmful organic pollutants in an electromagnetic synergistically enhanced biological packing tower according to claim 1, characterized in that: the magnetic filler is a permanent magnetic material filler or/and a soft magnetic material filler, and the magnetic energy product of the magnetic filler is 0.6 ~ 59MGOe , The filler particle size is 100~8000μm. 3. The method for purifying toxic and harmful organic pollutants in electromagnetic synergistically strengthened biological packing tower according to claim 2, characterized in that: the permanent magnet filler is NdFeB rare earth alloy, AlNiCo permanent magnet material, FeCrCo permanent magnet material , barium ferrite permanent magnet material, strontium ferrite permanent magnet material or a mixture of several random ratios. 4. The method for purifying toxic and harmful organic pollutants in electromagnetic synergistically strengthened biological packing tower according to claim 2, characterized in that: the soft magnetic material is pure iron, low carbon steel, iron-silicon alloy, iron-aluminum alloy, iron-silicon-aluminum alloy , nickel-iron alloy, iron-cobalt alloy, soft ferrite or a mixture of several in any ratio. 5. The method for purifying toxic and harmful organic pollutants in electromagnetic synergistically strengthened biological packing tower according to claim 1 is characterized in that: the micro-electrolysis packing material is iron-carbon packing material, iron-copper packing material, zinc-carbon packing material, A mixture of one or more of aluminum-carbon filler materials and magnesium-carbon filler materials in any ratio, the particle size of the filler is 100~3000μm, and the mixing mass ratio of the two raw materials in the filler material is 1.5~1:1. 6. The method for purifying toxic and harmful organic pollutants in electromagnetic synergistically strengthened biological packing tower according to claim 1, characterized in that: the carrier filler is composed of carrier and crosslinking agent, wherein the carrier is activated carbon, peat, textiles, plant stems One or several kinds of leaf root residues and plastics; the crosslinking agent is one or several kinds of polyvinyl fluoride, alginate, calcium oxide, calcium hydroxide, etc., and 1g of carrier filler contains 0.05~ 0.5g.