CN102730912B - Integrated sewage-sludge treatment method - Google Patents
Integrated sewage-sludge treatment method Download PDFInfo
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- CN102730912B CN102730912B CN2012102374077A CN201210237407A CN102730912B CN 102730912 B CN102730912 B CN 102730912B CN 2012102374077 A CN2012102374077 A CN 2012102374077A CN 201210237407 A CN201210237407 A CN 201210237407A CN 102730912 B CN102730912 B CN 102730912B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sewage-sludge treatment and relates to an integrated sewage-sludge treatment method, comprising the following steps of: firstly blending sludge into mud-water mixed fluid; separating out large-granule fiber impurities by a rotary screen, thereby obtaining separated mixed fluid; centrifuging and settling thick-granule and high-density muddy sand by a hydrocyclone so as to separate out and remove inorganic particles, thereby obtaining secondary separated mixed fluid; performing iron carbon micro-electrolysis treatment by using a filter column by means of an iron carbon micro-electrolysis treatment apparatus, and simultaneously, introducing ozone so that the removal rate of the organic matters reaches 15-20%, thereby obtaining primary purified mixed fluid; treating the primary purified mixed fluid with ultrasonic waves to obtain secondary purified mixed fluid; removing the organic matters by 30-40% of the total amount thereof in the secondary purified mixed fluid through high-temperature anaerobic digestion, thereby obtaining third-stage purified mixed fluid; and removing the organic matters by 35-45% of the total amount thereof by using an aerating biochemical pool, thereby obtaining fourth-stage purified mixed fluid. The integrated sewage-sludge treatment method is simple in process, safe and reliable in equipment, friendly to production environment, energy-saving, high in treatment efficiency and good in economic benefit.
Description
Technical field:
The invention belongs to the wastewater sludge processing technology field, relate to the comprehensive treating process of precipitating sludge in a kind of urban sewage water and utilize Technology, particularly a kind of sewage sludge integral treatment method.
Background technology:
Currently, domestic sewage plant output generally preclude the use of drying sludge, landfill, anaerobic digestion, aerobic fermentation (composting), incineration, lime treatment and quenching methods such as modified deep dehydration treatment, and some construction there are specialized yard to store and so on.The Committee of Development and Reform of Country family issue<<town sewage plant & Mud and pollution prevention technique policy in regulation should not Bian with the high-quality primary energy source, make main thermal source and carry out dewatered sludge, therefore what have utilizes remaining heat of flue gas from steam power plant, and what have utilizes Coalhotairfurnace or fluidized-bed combustion boiler waste-heat; Some with the cement kiln mummification and using its inorganic components as cement raw material or the methods such as Bian water heat drying that have process.No matter adopt which kind of mode all directly indirectly by heat, 1 ton of mud is down to 30% from moisture 80% according to reports needs 0.65 ton of steam, and by 145 yuan/t steam calculation of price, only one of steam will 94 yuan; Add unslaked lime and the heating of reaction of moisture wherein that have make the moisture evaporation, have killed again the pathogeny bacterium, also can make the heavy metal salt form precipitation of hydroxide.Mud is moisture be down to 30-60% after, can be used as fuel building materials refuse landfill overburden soil or make afforestation matrix soil etc.; Mummification mode not commensurability's (a ton) investment differs greatly, and low tens0000 yuan, what have reaches 1,000,000 yuan, majority is hundreds of thousands of unit, dispose the general 90-155 unit/t of expense (refer to moisture 80% wet mud, Bian is lower with the waste heat mummification, higher by the unslaked lime mode).
According to statistics, at present known have more than 20 to adopt the compost disposing sludge, from technical standpoint, becomes private school, the organic nutritive ingredient that can change into crop wherein after aerobic fermentation, and especially N, P, K are fully used.This mode is difficult to draw a conclusion is that how this is probably to affect the restraining factors that composting mode is promoted for the impact of wherein heavy metal and poisonous element.Prepared fertilizer, Chemical Mixed Fertilizer and matrix soil are for afforestation, and flowers or plantation fertilising, do not enter food chain; When imposing on grain dish when fruit whereabouts in whole food chain and move towards, need Guan for a long time to examine test and data accumulation could to explore and arrive its regularity, imposing on the trend of the migration in soil behind farmland also needs to inquire into, in soil, can or can not collect tired, run off and to enter water body and have how many by the rainwater leaching, pollution level is as how.The investment of compost is little, but compost becomes the dominant direction of Country family's industry policy, has to be seen.
Existing anaerobic digestion techniques is also one of sludge stabilizing processing means, can obtain biogas is used, some Sewage Plant have the sludge digestion system, with pump, the lifting of the thickened sludge of concentration basin is entered to the laggard anaerobic digester of heat exchanger heats and carry out anaerobic digestion, the biogas produced is used as methane boiler fuel after desulfurization dewatering, digested sludge is outward transport disposal again after dehydration, that sand content is higher in addition, many local combined systems that adopt, the Sewage Plant mud and sand silting is serious, the inorganic componentss such as silt particle account for larger proportion, and can not change into biogas.Incineration technology is also current sludge disposal one of method the most thoroughly, can make whole oxidation operations, kill pathogenic bacteria, make to greatest extent dirty mud minimizing, some mud and the generating of rubbish mixed burning, the special incinerator of building had is burned, burning ash as improvement soil, build the road, brick and tile pottery or concrete fill etc.But will be sludge drying to moisture below 50% before burning, power consumption is large; In addition, in the burning process, in mud, the hazardous and noxious substances such as the oxide compound of contained N, P, K and various trace elements and Dioxins all can discharge, and to their back-end processing, also can strengthen investment and working cost.In addition, the processing of mud is disposed and also had hydrothermal method or through modified squeezing deep dehydration, the employing earthworm also had is disposed etc.; In a word, existing sewage sludge treatment process relative complex, power consumption is large, the wasting of resources, environmental influence is larger, and cost is high, and secondary pollution is many, and overall economic efficiency is poor.
Summary of the invention:
The object of the invention is to overcome the shortcoming that prior art exists, seek to design the Technology of mud joint disposal and utilization in the sewer of a set of cities and towns, adopt integrated novel process to be processed and fully utilize sewage sludge, integral process is that sewage sludge is processed on a technique chain not only to closely connected but also two links emphasizing particularly on different fields, makes sewage disposal become a complete industry.
To achieve these goals, the present invention includes that mixed solution preparation, hair fiber separate, silt particle separates, iron-carbon micro-electrolysis adds ozonize, ultrasonication, secondary anaerobic digestion, aerobic treatment and Multifunctional electrolysis process eight processing steps:
(1), mixed solution preparation: first mud or sewage melt cinder after Anaerobic Digestion of prior art are made into to the muddy water mixed solution that weight percent concentration is 1.7-2.3%;
(2), hair fiber separates: the hair in muddy water mixed solution, cotton rope, Mierocrystalline cellulose, hemicellulose, plastics chip, plant straw, seed chaff skin, paper and the larger fiber impurity of tin pool paper particle are separated with commercially available trommel screen, or adopt the oscillatory type solid-liquid separating machine to be separated; Must separate mixed solution;
(3), silt particle separates: the thick silt particle larger with density of particle that will separate in mixed solution adopts conventional hydrocyclone centrifugal settling to be separated removal, making to separate the mixed solution control pressure sends into from the opening for feed on Tong Duan top, swirler garden, form and rotatablely move at swirler Inner, utilize varying in size of the suffered centrifugal force of the density of weight phase or large or fine granule particle size differences and fluid drag force, mutually light or thin mud level is discharged by the swirler upflow tube, heavy phase or coarse fraction are discharged by bottom, isolate the inorganic particle of 60-80%, obtain the secondary separation mixed solution;
(4), iron-carbon micro-electrolysis adds ozonize: select conventional iron-carbon micro-electrolysis treatment facility to carry out the iron-carbon micro-electrolysis processing with Filter column or cylinder reactor, pass into ozone to reactor Inner by 100-200g/m3 simultaneously, normal-temperature reaction 45-90 minute, make organic removal rate account for the 15-20% of total amount, improve the biodegradability of mixed solution, obtain the primary purifying mixed solution;
(5), ultrasonication: adopt ultrasonic wave to be processed the primary purifying mixed solution, the shockwave that utilizes the cavitation effect of ultrasonic wave in liquid to produce and the physical action of part moment high temperature, smash tough and tensile cell walls, make cell Inner substance release out enter liquid phase in order to removed by biochemical degradation, the residual karyocyte wall of the microorganism that accounts for main component in mud is broken up and smashes, lay foundation for follow-up anaerobic and aerobic biochemical treatment, obtain the secondary purification mixed solution;
(6), secondary anaerobic digestion: Bian further removes the organic substance in the secondary purification mixed solution by 50-55 ℃ of thermophilic digestion, utilizes anerobe and double oxygen bacterium under isolated air conditions, and the organism in the secondary purification mixed solution is changed into to methane (CH
4), CO
2and H
2o, methane is as fuel heating secondary purification mixed solution; Secondary anaerobic digestion 20-30 days, the 30-40% of total amount of organic in mud or mixed solution is removed in the secondary anaerobic digestion, obtains three grades and purifies mixed solution;
(7), aerobic treatment: aerobic treatment is divided into pre-treatment and the mud embrane method is processed two steps, pre-treatment Bian is with conventional aeration biochemical pond, establish micro-hole aerator at the bottom of pond, with the oxygen supply of gas blower blower aeration, and stir with agitator under water, gas-liquid-solid three-phase in three grades of purification mixed solutions is mixed at any time, pre-treatment is removed partial organic substances and is shared part degraded load, improve dissolved oxygen (DO) amount in mixed solution, process and lay the first stone for the mud embrane method of back, the 8-10% that organism accounts for total amount is removed in pre-treatment; Then the mud embrane method is processed, the mud embrane method is the biological chemistry treatment process that activated sludge process and biomembrance process combine, utilize sewage sludge processing degraded and mud-water separation in the characteristics of one, in the mud of failing to degrade at biochemical zone, organism is 10-80 days in the settling region residence time, further degraded, make organic content in precipitating sludge drop to minimum; It is back to the aeration biochemical pond again and is for further processing to qualified discharge, the mud embrane method is removed the 35-45% that organism accounts for total amount, obtains level Four and purifies mixed solution;
(8), Multifunctional electrolysis: Multifunctional electrolysis groove treatment process in support is set, when the tail water COD<500mg/L of mud embrane method processing has lower the requirement to COD, adopt again electrolyzer to be for further processing, utilize electrochemical principle at the Strong of anode oxygenizement degradable organic pollutant, heavy metal ion is deposited on negative electrode and is removed in cathodic reduction simultaneously; Sewage residence time in electrolyzer is 50-70 minute, realizes the processing fully of mud.
The present invention relates to the length of the sieve drum is 3-5m, a diameter of 1.5-2.0m, and the installation angle 3-10r/min speed of 1-5 degrees, the speed and angle adjustable two separate but interrelated Ji, more speed fast forward movement, the faster the material in the drum sieve shorter residence time, productivity is high; vice versa, and the faster the speed the greater the inclination achieve the same effect, another fixed an adjustment, separation requirements are met under the premise of improving efficiency in order to reduce production costs, drum sieve sieve is 1mm, 2mm or 3mm single aperture, or from the feed end to the discharge end by 1mm, 2mm and 3mm, respectively, in order of priority, its share trommel each lateral length ratio of 1/3, or a large proportion of the aperture or smaller, to be allocated according to the sludge to make a small test screening, the ratio of the particle size distribution of the material derived data, crude accounts for a small proportion of multiple small aperture a little; drum sieve tube wall of the discharge end of the mouth, using a continuous discharge open, or set the shutter open intermittent discharge at any time, so that the size of> 1mm impurity removal rate of over 80%; drum sieve perforated pipe located above the sieve tube is turned sewage to wash sieve to remain open.
The present invention realizes comprehensive utilization of resources, by close-coupled processing, the organic composition of 85-90% is removed, return to the only 7-10% of Sewage Plant biochemistry pool with tail water, the inorganic residues of last output is only containing organic composition 2-5%, innoxious, the minimizing of real Now mud, stabilization and resource utilization; Its treatment process is simple, and device security is reliable, and production environment close friend saves the energy, and processing efficiency is high, good in economic efficiency.
The accompanying drawing explanation:
Fig. 1 is the treatment process structural principle schematic flow sheet the present invention relates to.
Embodiment:
Below by embodiment, also the invention will be further described by reference to the accompanying drawings.
The present embodiment comprises that mixed solution preparation, hair fiber separation, silt particle separation, iron-carbon micro-electrolysis add ozonize, ultrasonication, secondary anaerobic digestion, aerobic treatment and Multifunctional electrolysis and process eight processing steps:
(1), mixed solution preparation: first mud or sewage melt cinder after Anaerobic Digestion of prior art are made into to the muddy water mixed solution that weight percent concentration is 1.7-2.3%;
(2), hair fiber separates: the hair in muddy water mixed solution, cotton rope, Mierocrystalline cellulose, hemicellulose, plastics chip, plant straw, seed chaff skin, paper and the larger fiber impurity of tin pool paper particle are separated with commercially available trommel screen, or adopt the oscillatory type solid-liquid separating machine to be separated; Must separate mixed solution;
(3), silt particle separates: the thick silt particle larger with density of particle that will separate in mixed solution adopts conventional hydrocyclone centrifugal settling to be separated removal, making to separate the mixed solution control pressure sends into from the opening for feed on Tong Duan top, swirler garden, form and rotatablely move at swirler Inner, utilize varying in size of the suffered centrifugal force of the density of weight phase or large or fine granule particle size differences and fluid drag force, mutually light or thin mud level is discharged by the swirler upflow tube, heavy phase or coarse fraction are discharged by bottom, isolate the inorganic particle of 60-80%, obtain the secondary separation mixed solution;
(4), iron-carbon micro-electrolysis adds ozonize: select conventional iron-carbon micro-electrolysis treatment facility to carry out the iron-carbon micro-electrolysis processing with Filter column or cylinder reactor, pass into ozone to reactor Inner by 100-200g/m3 simultaneously, normal-temperature reaction 45-90 minute, make organic removal rate account for the 15-20% of total amount, improve the biodegradability of mixed solution, obtain the primary purifying mixed solution;
(5), ultrasonication: adopt ultrasonic wave to be processed the primary purifying mixed solution, the shockwave that utilizes the cavitation effect of ultrasonic wave in liquid to produce and the physical action of part moment high temperature, smash tough and tensile cell walls, make cell Inner substance release out enter liquid phase in order to removed by biochemical degradation, the residual karyocyte wall of the microorganism that accounts for main component in mud is broken up and smashes, lay foundation for follow-up anaerobic and aerobic biochemical treatment, obtain the secondary purification mixed solution;
(6), secondary anaerobic digestion: Bian further removes the organic substance in the secondary purification mixed solution by 50-55 ℃ of thermophilic digestion, utilizes anerobe and double oxygen bacterium under isolated air conditions, and the organism in the secondary purification mixed solution is changed into to methane (CH
4), CO
2and H
2o, methane is as fuel heating secondary purification mixed solution; Secondary anaerobic digestion 20-30 days, the 30-40% of total amount of organic in mud or mixed solution is removed in the secondary anaerobic digestion, obtains three grades and purifies mixed solution;
(7), aerobic treatment: aerobic treatment is divided into pre-treatment and the mud embrane method is processed two steps, pre-treatment Bian is with conventional aeration biochemical pond, establish micro-hole aerator at the bottom of pond, with the oxygen supply of gas blower blower aeration, and stir with agitator under water, gas-liquid-solid three-phase in three grades of purification mixed solutions is mixed at any time, pre-treatment is removed partial organic substances and is shared part degraded load, improve dissolved oxygen (DO) amount in mixed solution, process and lay the first stone for the mud embrane method of back, the 8-10% that organism accounts for total amount is removed in pre-treatment; Then the mud embrane method is processed, the mud embrane method is the biological chemistry treatment process that activated sludge process and biomembrance process combine, utilize sewage sludge processing degraded and mud-water separation in the characteristics of one, in the mud of failing to degrade at biochemical zone, organism is 10-80 days in the settling region residence time, further degraded, make organic content in precipitating sludge drop to minimum; It is back to the aeration biochemical pond again and is for further processing to qualified discharge, the mud embrane method is removed the 35-45% that organism accounts for total amount, obtains level Four and purifies mixed solution;
(8), Multifunctional electrolysis: Multifunctional electrolysis groove treatment process in support is set, when the tail water COD<500mg/L of mud embrane method processing has lower the requirement to COD, adopt again electrolyzer to be for further processing, utilize electrochemical principle at the Strong of anode oxygenizement degradable organic pollutant, heavy metal ion is deposited on negative electrode and is removed in cathodic reduction simultaneously; Sewage residence time in electrolyzer is 50-70 minute, realizes the processing fully of mud.
Embodiment:
Certain Sewage Plant anaerobic sludge, analysis ingredient content is as follows: moisture 78% contains 780kg water in the wet mud of 1000kg; Contain 220kg in the wet mud of solid formation 22%1000kg; (to burn volatile matter) is 121kg to account for 55% containing organic composition in solid formation, and wherein > to account for 5% be 6.05kg. to the coarse grain impurity such as the fiber of 1mm, plastics, hair, plant straw; In solid formation, to account for 45% (in burning residue) be 99kg to inorganic components, wherein particle diameter 0.1-2.0mm density > to account for 5% be 4.95kg for the inorganic particles such as silt particle of 1g/cm3; Adopt shown in Fig. 1 as follows with the rear result of integral process processing of summary of the invention: trommel screen is isolated the 4.5kgkg such as fiber, hair, accounts for 74.4% of coarse grain impurity, accounts for 3.72% of total organic composition, and remaining 116.5kg organic composition enters subsequent handling; Isolate the inorganic particle 3.5kg such as silt particle with hydrocyclone and account for 70.7%, remaining 95.5kg inorganic components enters subsequent handling, in subsequent handling, no longer changes until enter residue; Iron-carbon micro-electrolysis adds O3 and processes removal organic composition 18.15kg, accounts for and enters organic 15%; Organic composition 39.5kg is removed in the secondary anaerobic digestion, accounts for and enters organic 33%; Aerobic pretreatment is removed organism 10.27kg, accounts for organic 8.49%; The mud embrane method is removed organism 34.3kg, accounts for organic 28.35%; Inorganic residues is taken away 2.3kg and is accounted for organic 1.9%; Tail water returns to biochemistry pool and takes away 12kg and account for 9.92%; Its mesophytization part (anaerobic and aerobic) is removed organism 63.84% altogether, and trommel screen and iron-carbon micro-electrolysis materialization are partly removed organism and only accounted for 18.72%; The inorganic residues of final output amounts to 97.8kg, wherein containing organism 2.3kg, account for 2.35%, similar to soil constituent, can be as the Nutrition Soil of landscape flower, also can make cement ` brick and tile or ceramic raw material, also can be used as the raw material of chemical industry or ironmaking when iron content reaches 20% left and right.
Claims (2)
1. a sewage sludge integral treatment method is characterized in that comprising that mixed solution preparation, hair fiber separate, silt particle separates, iron-carbon micro-electrolysis adds ozonize, ultrasonication, secondary anaerobic digestion, aerobic treatment and Multifunctional electrolysis process eight processing steps:
(1), mixed solution preparation: first mud or sewage melt cinder after Anaerobic Digestion of prior art are made into to the muddy water mixed solution that weight percent concentration is 1.7-2.3%;
(2), hair fiber separates: the larger fiber impurity of particle in the hair in muddy water mixed solution, cotton rope, Mierocrystalline cellulose, hemicellulose, plastics chip, plant straw, seed chaff skin, paper and tin pool paper is separated with commercially available trommel screen, or adopt the oscillatory type solid-liquid separating machine to be separated; Must separate mixed solution;
(3), silt particle separates: the thick silt particle larger with density of particle that will separate in mixed solution adopts conventional hydrocyclone centrifugal settling to be separated removal, making to separate the mixed solution control pressure sends into from the opening for feed on swirler cylindrical section top, form and rotatablely move in swirler, utilize varying in size of the suffered centrifugal force of the density of weight phase or large or fine granule particle size differences and fluid drag force, mutually light or thin mud level is discharged by the swirler upflow tube, heavy phase or coarse fraction are discharged by bottom, isolate the inorganic particle of 60-80%, obtain the secondary separation mixed solution;
(4), iron-carbon micro-electrolysis adds ozonize: select conventional iron-carbon micro-electrolysis treatment facility to carry out the iron-carbon micro-electrolysis processing with Filter column or cylinder reactor, press 100-200g/m in reactor simultaneously
3pass into ozone, normal-temperature reaction 45-90 minute, make organic removal rate account for the 15-20% of total amount, and the biodegradability of raising mixed solution, obtain the primary purifying mixed solution;
(5), ultrasonication: adopt ultrasonic wave to be processed the primary purifying mixed solution, the shockwave that utilizes the cavitation effect of ultrasonic wave in liquid to produce and the physical action of part moment high temperature, smash tough and tensile cell walls, intracellular matter is discharged and enter liquid phase in order to removed by biochemical degradation, the residual karyocyte wall of the microorganism that accounts for main component in mud is broken up and smashes, lay foundation for follow-up anaerobic and aerobic biochemical treatment, obtain the secondary purification mixed solution;
(6), secondary anaerobic digestion: Bian further removes the organic substance in the secondary purification mixed solution by 50-55 ℃ of thermophilic digestion, utilizes anerobe and double oxygen bacterium under isolated air conditions, and the organism in the secondary purification mixed solution is changed into to methane (CH
4), CO
2and H
2o, methane is as fuel heating secondary purification mixed solution; Secondary anaerobic digestion 20-30 days, the 30-40% of total amount of organic in mud or mixed solution is removed in the secondary anaerobic digestion, obtains three grades and purifies mixed solution;
(7), aerobic treatment: aerobic treatment is divided into pre-treatment and the mud embrane method is processed two steps, pre-treatment Bian is with conventional aeration biochemical pond, establish micro-hole aerator at the bottom of pond, with the oxygen supply of gas blower blower aeration, and stir with agitator under water, gas-liquid-solid three-phase in three grades of purification mixed solutions is mixed at any time, pre-treatment is removed partial organic substances and is shared part degraded load, improve dissolved oxygen (DO) amount in mixed solution, process and lay the first stone for the mud embrane method of back, the 8-10% that organism accounts for total amount is removed in pre-treatment; Then the mud embrane method is processed, the mud embrane method is the biological chemistry treatment process that activated sludge process and biomembrance process combine, utilize sewage sludge processing degraded and mud-water separation in the characteristics of one, in the mud of failing to degrade at biochemical zone, organism is 10-80 days in the settling region residence time, further degraded, make organic content in precipitating sludge drop to minimum; It is back to the aeration biochemical pond again and is for further processing to qualified discharge, the mud embrane method is removed the 35-45% that organism accounts for total amount, obtains level Four and purifies mixed solution;
(8), Multifunctional electrolysis: Multifunctional electrolysis groove treatment process in support is set, when the tail water COD<500mg/L of mud embrane method processing has lower the requirement to COD, adopt again electrolyzer to be for further processing, utilize the strong oxidation degradable organic pollutant of electrochemical principle at anode, heavy metal ion is deposited on negative electrode and is removed in cathodic reduction simultaneously; Sewage residence time in electrolyzer is 50-70 minute, realizes the processing fully of mud.
2. sewage sludge integral treatment method according to claim 1, it is characterized in that the trommel screen length related to is that 3-5m, diameter are that 1.5-2.0m, rotating speed are 3-10r/min and mounted angle 1-5 degree, rotating speed and inclination angle are adjustable, the faster material of the rotating speed speed that travels forward is faster, and in trommel screen, the residence time is shorter; The sieve aperture of trommel screen is 1mm, 2mm or 3mm single aperture, or by 1mm, 2mm and 3mm, is arranged in order respectively from feed end to discharge end, and its shared trommel screen lateral length ratio respectively accounts for 1/3; On the end barrel of trommel screen, the discharge opening continuous discharge is set, or baffledly opens at any time intermittently discharging, make size the removal of impurity of 1mm reaches more than 80%; Establish perforated pipe and connect sewage above the screen drum of trommel screen, to rinse sieve aperture to keep unimpeded.
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| WO2014142762A1 (en) * | 2013-03-15 | 2014-09-18 | Nanyang Technological University | Combined ultrasonication and enzymatic pretreatment of waste activated sludge prior to anaerobic digestion |
| CN106025296A (en) * | 2016-07-27 | 2016-10-12 | 同济大学 | Nitrogen-phosphorus double-doped carbon material as well as preparation method and application thereof |
| CN106430888A (en) * | 2016-11-30 | 2017-02-22 | 黑龙江省科学院科技孵化中心 | Movable sewage treatment device and treatment method thereof |
| CN106882900A (en) * | 2017-02-27 | 2017-06-23 | 南京元凯生物能源环保工程有限公司 | A kind of later stage depth processing unit of organic wastewater and its technological process |
| CN108046516B (en) * | 2017-11-28 | 2021-04-20 | 四川理工学院 | A kind of OCO activated sludge improvement process and device for strengthening urban sewage treatment |
| CN110194507B (en) * | 2018-02-27 | 2021-11-26 | 湖南金保树环保科技有限公司 | Sewage treatment method after sludge treatment |
| CN108689561B (en) * | 2018-05-28 | 2020-07-14 | 山东科技大学 | Sludge harmless treatment method and device |
| CN108977360A (en) * | 2018-08-31 | 2018-12-11 | 中冶华天工程技术有限公司 | The method that town sewage plant tail water is used for microbial bacterial agent culture |
| CN109569059A (en) * | 2018-12-24 | 2019-04-05 | 亚太泵阀有限公司 | A kind of city domestic sewage transportation system and method |
| CN111807583A (en) * | 2020-07-31 | 2020-10-23 | 山东大学 | Method and device for degrading antibiotic wastewater based on the combined action of electrolysis and cavitation |
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