CN117819701B - Preparation of a novel conductive biological filler and method for treating organic wastewater thereof - Google Patents
Preparation of a novel conductive biological filler and method for treating organic wastewater thereof Download PDFInfo
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- CN117819701B CN117819701B CN202410158267.7A CN202410158267A CN117819701B CN 117819701 B CN117819701 B CN 117819701B CN 202410158267 A CN202410158267 A CN 202410158267A CN 117819701 B CN117819701 B CN 117819701B
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- 239000000945 filler Substances 0.000 title claims abstract description 86
- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 29
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 29
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 22
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 22
- 239000000661 sodium alginate Substances 0.000 claims abstract description 22
- 229920001661 Chitosan Polymers 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 14
- 238000007710 freezing Methods 0.000 claims abstract description 7
- 230000008014 freezing Effects 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- 238000010257 thawing Methods 0.000 claims abstract description 7
- 238000004108 freeze drying Methods 0.000 claims abstract description 6
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 6
- 239000012498 ultrapure water Substances 0.000 claims abstract description 6
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000005273 aeration Methods 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 25
- 238000011282 treatment Methods 0.000 description 18
- 244000005700 microbiome Species 0.000 description 9
- 230000008961 swelling Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 244000088401 Pyrus pyrifolia Species 0.000 description 1
- 235000001630 Pyrus pyrifolia var culta Nutrition 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002921 fermentation waste Substances 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000010909 process residue Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a preparation method of a novel conductive biological filler and a method for treating organic wastewater, belonging to the technical field of wastewater treatment. The method comprises the steps of S1, respectively dissolving sodium alginate and chitosan in ultrapure water heated by a constant-temperature water bath to prepare a mixed solution, S2, adding polyvinyl alcohol powder and ferric trichloride into the mixed solution to prepare mixed gel, S3, repeatedly freezing and thawing the mixed gel, and then freeze-drying to obtain the conductive biological filler, and using the prepared conductive biological filler for treating high-concentration organic wastewater, so that the degradation rate of the biological filler is improved, and the pollutant removal effect is improved.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and relates to a preparation method of novel conductive biological filler and a method for treating organic wastewater by using the novel conductive biological filler.
Background
The annual global waste water yield is about 3590 hundred million cubic meters, and mainly comprises domestic sewage, agricultural waste water and industrial waste water. Among these waste waters, organic waste water occupies a high proportion, such as high concentration organic waste water such as new landfill leachate, food processing and fermentation waste water, and the like, which poses serious threat to soil environment and surface/ground water. The high-concentration organic wastewater, namely the wastewater with the COD concentration of more than 2000mg/L, has the characteristics of high suspended matter content, high chromaticity, obvious peculiar smell, high organic matter concentration, complex water quality components and the like, and has higher treatment difficulty.
Sewage treatment can be classified into primary treatment and secondary treatment according to the treatment depth. The primary treatment aims at removing suspended solids, and is usually performed by a physical method, and the secondary treatment further removes colloid and soluble pollutants in sewage, and is usually performed by a biological method.
The biofilm method is one of the biological methods and is generally used in the secondary sewage treatment process, however, when the high-concentration organic wastewater is treated by the biofilm method, the biological film can be aged after a period of time due to slow growth and metabolism of microorganisms, so that the effect of treating the high-concentration organic wastewater by the biofilm method is limited.
Therefore, it is necessary to provide a method for preparing a novel conductive biological filler and treating organic wastewater by using the novel conductive biological filler, so that the treatment efficiency of the biological filler on high-concentration organic wastewater is improved, the treatment time is shortened, and the treatment effect of the biological filler on the high-concentration organic wastewater is improved.
Disclosure of Invention
In order to overcome the problems in the background technology, the invention provides a preparation method of a novel conductive biological filler and a method for treating organic wastewater by using the novel conductive biological filler.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
in one aspect, the invention provides a method for preparing a novel conductive biological filler, which comprises the following steps:
and S1, respectively dissolving sodium alginate and chitosan in ultrapure water heated by a constant-temperature water bath, and then continuously heating by the constant-temperature water bath and magnetically stirring until the raw materials are completely mixed and dissolved to obtain a mixed solution.
And S2, adding polyvinyl alcohol powder and ferric trichloride into the mixed solution obtained in the step S1, and continuously and mechanically stirring to obtain mixed gel.
And S3, putting the mixed gel obtained in the step S2 into a mould, freezing, thawing at room temperature, repeating the freezing and thawing process, and freeze-drying to obtain the conductive biological filler.
Preferably, the mass ratio of the sodium alginate to the chitosan to the polyvinyl alcohol to the ferric trichloride is (3:1:18:1) - (3:1:30:1). The biological filler is doped with ferric trichloride (FeCl 3) and Chitosan (CS), so that the biocompatibility of the filler can be effectively improved, the resistance of the filler can be reduced, the biological filler has better conductivity, and the stimulation effect of an electric field on microorganisms can be improved.
Preferably, in the step S1, the ultrapure water temperature is 90 ℃ and the magnetic stirring time is 30min.
Preferably, in the step S2, the mechanical stirring time is 15min.
Preferably, in the step S3, the mixed gel is thawed after being frozen at-10 ℃ for 3 hours, and the number of repetitions is 2.
In another aspect, the invention provides a method for treating high-concentration organic wastewater by using the prepared conductive biological filler, which comprises the following steps of
And Q1, connecting two carbon plates in the reactor with the anode and the cathode of a direct current power supply through wires, adjusting the position of an aeration head of an aeration device, and placing the aeration head at the bottom of the reactor.
Q2, adding biofilm-formed biological filler and high-concentration organic wastewater to be treated into the reactor.
And Q3, starting a direct current power supply, regulating voltage and current, then opening an aeration device, regulating aeration flow, and starting the conductive biological filler to treat the high-concentration organic wastewater.
Preferably, in the step Q3, the aeration flow rate is 0.8L/min, the voltage is 3V, and the current is 10mA.
The invention has the beneficial effects that:
1. According to the invention, the biological filler with conductivity is prepared, and microorganisms of the biological filler are stimulated by an electric field, so that pollutants such as COD, NH 4 + -N and the like in high-concentration organic wastewater are efficiently removed, the COD removal rate can reach more than 90% and the NH 4 + -N removal rate can reach more than 60% after 24 hours of treatment.
2. According to the invention, by adding ferric trichloride, fe 3+ can be separated out from the conductive biological filler to participate in extracellular electronic transfer of microorganisms, and meanwhile, the positively charged ferric hydroxide colloid can well adsorb negatively charged microorganisms, so that enrichment of microorganisms on the biological filler is accelerated, the time for forming a biological film is effectively shortened, and the treatment efficiency of high-concentration organic wastewater is further improved.
3. According to the invention, the original brittle sodium alginate gel is more flexible by adding chitosan, and meanwhile, the biocompatibility of the conductive biological filler is further improved by adding the degradable substance.
Drawings
FIG. 1 is a flow chart of a method for preparing the conductive biological filler of the invention.
In FIG. 2, (a) shows the COD concentration and pH change of 100g conductive biological filler dissolved solution at different ratios, and (b) shows the resistance and specific surface area change of 100g conductive biological filler at different ratios.
Fig. 3 is a scanning electron microscope image of conductive biological filler in different proportions, wherein (a) to (f) respectively correspond to scanning electron microscope images of polyvinyl alcohol (PVA): sodium Alginate (SA) =10:1, 8:1, 6:1, 4:1, 2:1, 1:1.
FIG. 4 is a graph showing the change in porosity and swelling ratio of 100g of the conductive bio-filler prepared according to the present invention in different proportions, wherein (a) is a graph showing the change in porosity and (b) is a graph showing the change in swelling ratio
FIG. 5 is a graph showing the change in COD and NH 4 + -N removal rates during wastewater treatment in example 1 and comparative example 2 according to the present invention, wherein (a) is a graph showing the change in COD removal rate and (b) is a graph showing the change in NH 4 + -N removal rate.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
In the embodiment and the comparative example, a Lei Ci pH meter is adopted to measure pH, a Hash rapid digestion method is adopted to measure COD concentration, a Hash DR3900 spectrophotometer is adopted to measure NH 4 + -N concentration through a Nashi spectrophotometry, a Shanghai Chenhua electrochemical workstation is adopted to measure resistance, a full-automatic specific surface area nitrogen adsorption method is adopted to measure specific surface area, an analytical balance is utilized to weigh mass of the conductive biological filler before and after rehydration and mass of the conductive biological filler before and after preparation, porosity is obtained through calculation, and a vernier caliper is adopted to measure radius of the conductive biological filler and swelling rate is obtained through calculation.
Example 1
According to the mass ratio of Sodium Alginate (SA) to Chitosan (CS) to polyvinyl alcohol (PVA) to ferric trichloride=3:1:18:1, 3:1:24:1 and 3:1:30:1, 6 parts of raw materials are respectively weighed, and marked for standby, wherein the mass ratio of PVA to SA is 6:1, 8:1 and 10:1 respectively.
300ML of ultrapure water is firstly added into 3 beakers, the beakers are heated to 90 ℃ in a water bath, then 3 parts of weighed sodium alginate and chitosan are respectively added into 3 beakers, marks are made, and after the addition, the beakers are magnetically stirred for 30min, and the raw materials are completely dissolved.
And adding 3 parts of weighed polyvinyl alcohol powder and ferric trichloride into 3 beakers respectively, and stirring for 15min by using a mechanical stirring mode, wherein the mixed solution is in a gel state.
And (3) putting the gel substance into a mould, putting the mould into a refrigerator, freezing for 3 hours at the temperature of minus 10 ℃, taking out, thawing at the normal temperature, putting the mould into the refrigerator, freezing for 3 hours at the temperature of minus 10 ℃, taking out, thawing at the normal temperature, and freeze-drying the material to obtain 3 parts of conductive biological filler.
Comparative example 1
The conductive biological filler is prepared by adopting the same method as that of the embodiment 1, wherein in the comparative example, when raw materials are weighed, three parts of raw materials are weighed according to Sodium Alginate (SA) Chitosan (CS) polyvinyl alcohol (PVA) ferric trichloride=3:1:3:1, 3:1:6:1 and 3:1:12:1, wherein the PVA: SA is respectively 1:1, 2:1 and 4:1, and 3 parts of the conductive biological filler is prepared.
The 6 parts of conductive biological filler prepared in the example 1 and the comparative example 1 are respectively soaked in water for rehydration, the COD concentration and the pH of the dissolution liquid in the rehydration process are measured, the resistance, the swelling rate, the porosity and the specific surface area of the filler block are measured, and a scanning electron microscope experiment is carried out, so that the result is shown in figure 2.
As can be seen from FIG. 2 (b), the resistance of the filler at different ratios decreases with decreasing ratio of PVA to SA, while the specific surface area increases. While the filler at this ratio has better conductivity and larger specific surface area than the filler at a high PVA content, the filler at a low PVA content has good conductivity and larger specific surface area, as can be seen from fig. 2 (a), the COD dissolution concentration is larger with a lower PVA content, indicating that the low PVA content has a larger influence on the overall stability of the filler, which tends to result in loss of filler content,
As can be seen from fig. 3, as the ratio PVA: SA increases, the amount of voids on the filler surface also increases gradually. (f) In the figure, the magnification is different from other ratios because the filler is extremely fragile after lyophilization. (c) The surface pores of the filler in the figure are more, the whole pores are more uniform, and a space network structure formed by PVA self-crosslinking is reflected, and (e) the surface pores of the filler in the figure are larger and the uniformity is poor, and meanwhile, the section of the whole filler is biased to one side in the brittle fracture process, so that the defect of insufficient structural stability of the filler with low PVA content is indicated.
As can be seen from FIG. 4, the porosity of the filler at different ratios decreases with increasing PVA to SA ratio, whereas the swelling ratio increases, and too high porosity results in less physical volume in the filler and lower overall mechanical strength, which indicates that the filler has higher dimensional stability at high PVA to SA ratio. The swelling ratio is high, the water absorption performance of the filler is good under the condition of high PVA: SA proportion, the internal water-containing pores are more, in the swelling experiment process, the filler with the PVA: SA of 6:1 can be obviously observed to disintegrate in water to different degrees, and the filler with the PVA: SA of 2:1 and 1:1 is mostly disintegrated, so that the complete form can not be maintained.
In conclusion, the PVA content has a great influence on the performance of the conductive biological filler, and when the PVA content is high, the filler has good conductivity, high specific surface area, uniform porous morphology structure, stability, good water absorption and optimal comprehensive performance under the condition of meeting basic stability.
And selecting the prepared filler samples with the raw material ratio of 3:1:18:1 for organic wastewater treatment.
2 Carbon plates in the reactor are connected with the anode and the cathode of a direct current power supply through wires, the position of an aeration head of an aeration device is adjusted, and the aeration head is placed at the bottom of the reactor.
Adding biofilm carrier after membrane hanging and organic wastewater with COD concentration of 5000+/-320 mg/L, NH 4 + -N concentration of 500+/-88 mg/L into a reactor.
Starting a direct current power supply, regulating the voltage to be 3V, regulating the current to be 10mA, opening an aeration device, regulating the aeration flow to be 0.8L/min, and starting the biological filler to treat the organic wastewater.
After 24 hours of treatment, the organic wastewater was taken out, and the COD concentration and the NH 4 + -N concentration thereof were measured, and the results are shown in FIG. 5.
Comparative example 2
This comparative example was prepared by the same method as in example 1, and the organic wastewater was treated by the same method, except that the conductive biofilm carrier was not energized in this comparative example.
The COD concentration and the NH 4 + -N concentration of the organic wastewater treated in this comparative example are shown in FIG. 5.
As can be seen from FIG. 5, the removal rate of COD in example 1 can reach 92%, the removal rate of NH 4 + -N can reach 64%, while the removal rate of COD in comparative example 1 is only 82%, the removal rate of NH 4 + -N is only 41%, and the effect of applying an electric field is better than the effect of simply adopting the novel conductive filler. The electric field is proved to stimulate the microorganism, so that the activity of the microorganism is improved, and the microorganism can be treated more efficiently, and the treatment effect is better.
Comparative example 3
This comparative example was prepared and treated by the same method as in example 1, except that in this comparative example, the bio-filler contained no ferric chloride.
The biological filler in this comparative example had a reduced effect on the treatment of high-concentration organic wastewater as compared with example 1. When the biological filler lacks ferric chloride, the content of ions in the filler is reduced, so that the conductivity of the filler is greatly reduced, and the overall treatment performance is reduced under the action of an applied electric field.
Comparative example 4
This comparative example was prepared and treated with the same method as in example 1, except that in this comparative example, the bio-filler contained no chitosan.
The biological filler in this comparative example had a reduced effect on the treatment of high-concentration organic wastewater as compared with example 1. When the biological filler lacks chitosan, the prepared filler is crisp in texture, is easy to break off slag, is unfavorable for the running of the filler in the reactor, and is easy to disintegrate after being absorbed in the reactor, so that the treatment effect of the biological filler on high-concentration organic wastewater is affected.
Comparative example 5
This comparative example was prepared and treated by the same method as in example 1, except that in this comparative example, the bio-filler contained no chitosan and no ferric chloride.
The biological filler in this comparative example had a reduced effect on the treatment of high-concentration organic wastewater as compared with example 1. Because the biological filler lacks chitosan and ferric chloride, the problems of comparative example 2 and comparative example 3 are generated at the same time, the filler prepared by the comparative example is fragile and weak in electric conductivity, and the filler after freeze-drying has fragile characteristic, and has extremely poor structural strength, so that the filler cannot normally treat high-concentration organic wastewater.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. The preparation method of the novel conductive biological filler is characterized by comprising the following steps of:
s1, respectively dissolving sodium alginate and chitosan in ultrapure water heated by a constant-temperature water bath, and then continuously heating by the constant-temperature water bath and magnetically stirring until the raw materials are completely mixed and dissolved to obtain a mixed solution;
S2, adding polyvinyl alcohol powder and ferric trichloride into the mixed solution obtained in the step S1, and continuously and mechanically stirring to obtain mixed gel;
S3, putting the mixed gel obtained in the step S2 into a mould, freezing, thawing at room temperature, repeating the freezing and thawing process, and freeze-drying to obtain the conductive biological filler;
The mass ratio of the sodium alginate to the chitosan to the polyvinyl alcohol to the ferric trichloride is (3:1:18:1) - (3:1:30:1).
2. The method of claim 1, wherein the ultrapure water temperature in the step S1 is 90 ℃ and the magnetic stirring time is 30min.
3. The method of claim 1, wherein the mechanical stirring time in the step S2 is 15min.
4. The method of preparing a novel conductive bio-filler according to claim 1, wherein in the step S3, the mixed gel is thawed after being frozen for 3 hours at-10 ℃ and the repetition number is 2.
5. The application of the conductive biological filler prepared by the preparation method of any one of claims 1-4 in organic wastewater treatment is characterized by comprising the following steps:
q1, connecting two carbon plates in a reactor with the anode and the cathode of a direct current power supply through wires, adjusting the position of an aeration head of an aeration device, and placing the aeration head at the bottom of the reactor;
Q2, adding the conductive biological filler with good film formation and high-concentration organic wastewater to be treated into a reactor;
And Q3, starting a direct current power supply, regulating voltage and current, then opening an aeration device, regulating aeration flow, and starting the conductive biological filler to treat the high-concentration organic wastewater.
6. The method according to claim 5, wherein in the step Q3, the aeration flow is 0.8L/min, the voltage is 3V, and the current is 10mA.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103769062A (en) * | 2014-02-27 | 2014-05-07 | 江南大学 | Functionalized polyvinyl alcohol hydrogel and preparation method thereof |
| CN103951044A (en) * | 2014-05-23 | 2014-07-30 | 哈尔滨理工大学 | Novel non-sintered biological stuffing rapid in biofilm formation and preparation method thereof |
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| KR20010100335A (en) * | 2000-04-27 | 2001-11-14 | 양갑석 | Microbial blends for the wastewater treatment using freeze dried microbial blends and its manufacturing method |
| CN112340853B (en) * | 2020-10-15 | 2021-11-02 | 同济大学 | A kind of hybrid hydrogel carrier for high-salt wastewater treatment and preparation method thereof |
| CN117303564A (en) * | 2023-10-11 | 2023-12-29 | 湖北大学 | A kind of biological filler for sewage treatment and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769062A (en) * | 2014-02-27 | 2014-05-07 | 江南大学 | Functionalized polyvinyl alcohol hydrogel and preparation method thereof |
| CN103951044A (en) * | 2014-05-23 | 2014-07-30 | 哈尔滨理工大学 | Novel non-sintered biological stuffing rapid in biofilm formation and preparation method thereof |
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