CN113121066A - Method for treating abamectin wastewater - Google Patents
Method for treating abamectin wastewater Download PDFInfo
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- CN113121066A CN113121066A CN202110443396.7A CN202110443396A CN113121066A CN 113121066 A CN113121066 A CN 113121066A CN 202110443396 A CN202110443396 A CN 202110443396A CN 113121066 A CN113121066 A CN 113121066A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000005660 Abamectin Substances 0.000 title claims abstract description 25
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- 238000000926 separation method Methods 0.000 claims description 10
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- RRZXIRBKKLTSOM-XPNPUAGNSA-N avermectin B1a Chemical compound C1=C[C@H](C)[C@@H]([C@@H](C)CC)O[C@]11O[C@H](C\C=C(C)\[C@@H](O[C@@H]2O[C@@H](C)[C@H](O[C@@H]3O[C@@H](C)[C@H](O)[C@@H](OC)C3)[C@@H](OC)C2)[C@@H](C)\C=C\C=C/2[C@]3([C@H](C(=O)O4)C=C(C)[C@@H](O)[C@H]3OC\2)O)C[C@H]4C1 RRZXIRBKKLTSOM-XPNPUAGNSA-N 0.000 description 1
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- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000003120 macrolide antibiotic agent Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- NNKVPIKMPCQWCG-UHFFFAOYSA-N methamidophos Chemical compound COP(N)(=O)SC NNKVPIKMPCQWCG-UHFFFAOYSA-N 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229960005322 streptomycin Drugs 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
-
- 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
- C02F3/28—Anaerobic digestion processes
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- 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
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a method for treating abamectin wastewater, which adopts various combined technologies to comprehensively treat the wastewater, and adopts regulation, sedimentation, air flotation, anaerobic and aerobic biochemical systems and coagulation technologies to comprehensively treat the abamectin wastewater to finally reach the standard and discharge, thereby avoiding the problem that the wastewater cannot safely and stably reach the standard and discharge in the process of treating the wastewater by a single technology.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a method for treating abamectin wastewater.
Background
Abamectin (Avermectin is called AVM for short) is a novel high-efficiency, low-toxicity, safe and broad-spectrum antibiotic for agricultural and livestock, belongs to macrolide antibiotic insecticides and acaricides, is a fermentation metabolite of soil microorganism streptomycin griseus, and has been widely popularized and applied in the world as a substitute for organophosphorus high-toxicity pesticides such as methamidophos and the like. A large amount of wastewater is generated in the production process of the abamectin, and the wastewater has complex components, high organic matter concentration, high toxicity and deep chromaticity, and belongs to high-concentration organic wastewater which is difficult to treat.
At present, the method for treating the abamectin wastewater mainly comprises a UASB anaerobic and aerobic biological treatment process without pretreatment and advanced treatment processes. Because the AVM wastewater belongs to high-concentration organic wastewater, the wastewater contains a large amount of residual AVM and nonbiodegradable substances, and has toxic action on the biochemical treatment of the wastewater, and the UASB anaerobic reactor cannot resist the toxic action of the AVM, the anaerobic reaction is inhibited, and the treatment effect is low. The AVM wastewater contains a large amount of protein, the content of ammonia nitrogen and total nitrogen in the wastewater is high, and the common aerobic treatment process only has the function of removing ammonia nitrogen, does not have the function of removing total nitrogen and can not completely denitrify. The AVM wastewater contains a large amount of phosphorus, and only a small amount of phosphorus can be taken out in the conventional biological treatment, so that the AVM wastewater can not meet the requirement of the discharge standard. The AVM wastewater contains a large amount of oil substances, which can wrap sludge and reduce the efficiency of biochemical treatment, and the oil cannot be removed by common biochemical treatment.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for treating abamectin wastewater, which comprises the following steps in sequence:
step (1): discharging the abamectin production wastewater into an adjusting tank, carrying out water quality and water quantity equalization, adding liquid caustic soda, and adjusting the pH of the wastewater;
step (2): lifting the wastewater into a primary sedimentation tank by using a lifting pump to remove larger particulate impurities, feeding the supernatant into an air flotation machine to remove oil substances in the wastewater, and feeding the effluent into a hydrolysis acidification tank to perform pre-acidification treatment and adjust the water temperature;
and (3): after hydrolysis and acidification, the wastewater enters an EGSB anaerobic reactor for anaerobic biological treatment, most of COD in the wastewater is removed through anaerobic microorganisms, and macromolecular substances such as protein and the like are decomposed into micromolecular substances;
and (4): anaerobic effluent enters an A/O pool for further biochemical treatment, pollutants such as COD, ammonia nitrogen, total nitrogen and the like in the wastewater are removed by microorganisms, the effluent is subjected to mud-water separation in a secondary sedimentation tank, supernatant enters a coagulation tank for coagulation, the effluent enters a tertiary sedimentation tank for mud-water separation after full reaction, pollutants such as COD, total phosphorus and the like which cannot be removed by biochemical treatment are further removed, and the effluent reaches the standard and is discharged outside.
Preferably, in step (1), the pH of the wastewater is adjusted to 7.
In any of the above schemes, the detailed steps in step (2) are preferably: lifting the wastewater into a primary sedimentation tank by using a lifting pump, removing larger particulate impurities, allowing the supernatant to enter an air flotation machine, removing oil substances in the wastewater, allowing the effluent to enter a hydrolysis acidification tank for pre-acidification treatment, introducing steam into the hydrolysis acidification tank, and adjusting the water temperature to about 35 ℃.
In any of the above schemes, preferably, in the step (4), the supernatant enters a coagulation tank, and then coagulant polymeric ferric sulfate and coagulant aid polyacrylamide are added for coagulation.
The invention has the beneficial effects that:
(1) the method adopts various combined technologies to comprehensively treat the wastewater, and adopts regulation, sedimentation, air floatation, anaerobic and aerobic biochemical systems and coagulation technologies to comprehensively treat the abamectin wastewater, so that the final standard-reaching discharge is realized, and the problem that the wastewater cannot safely and stably reach the standard and is discharged in the process of treating the wastewater by a single technology is solved;
(2) the neutralization, precipitation and air flotation pretreatment process can fully remove suspended matters and oil substances which are difficult to biodegrade in water, and creates favorable conditions for subsequent biochemical treatment;
(3) the EGSB anaerobic reactor has strong impact load resistance, the strong external circulation system can effectively reduce the toxic and harmful substances to the toxic and harmful effects on anaerobic microorganisms, the COD removal rate can reach more than 85 percent, and macromolecular substances such as protein and the like can be decomposed into micromolecular substances, thereby providing favorable conditions for the subsequent aerobic biological treatment;
(4) in the coagulating sedimentation process, the coagulant polymeric ferric sulfate and the coagulant aid polyacrylamide are added to carry out advanced treatment on the abamectin wastewater, so that the COD, the total phosphorus and the chromaticity which are difficult to biodegrade in the wastewater are removed, and the treatment effect and the efficiency of the abamectin wastewater can be greatly improved: the COD removal rate of the abamectin wastewater treated by the method can reach 65%, the total phosphorus removal rate can reach 98%, and the chroma removal rate can reach 85%.
Drawings
FIG. 1 is a flow chart of a method for treating abamectin wastewater according to the invention.
Detailed Description
In order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
The invention provides a method for treating abamectin wastewater, which comprises the following steps in sequence:
step (1): discharging the abamectin production wastewater into an adjusting tank, carrying out water quality and water quantity equalization, adding liquid caustic soda, and adjusting the pH of the wastewater;
step (2): lifting the wastewater into a primary sedimentation tank by using a lifting pump to remove larger particulate impurities, feeding the supernatant into an air flotation machine to remove oil substances in the wastewater, and feeding the effluent into a hydrolysis acidification tank to perform pre-acidification treatment and adjust the water temperature;
and (3): after hydrolysis and acidification, the wastewater enters an EGSB anaerobic reactor for anaerobic biological treatment, most of COD in the wastewater is removed through anaerobic microorganisms, and macromolecular substances such as protein and the like are decomposed into micromolecular substances;
and (4): anaerobic effluent enters an A/O pool for further biochemical treatment, pollutants such as COD, ammonia nitrogen, total nitrogen and the like in the wastewater are removed by microorganisms, the effluent is subjected to mud-water separation in a secondary sedimentation tank, supernatant enters a coagulation tank for coagulation, the effluent enters a tertiary sedimentation tank for mud-water separation after full reaction, pollutants such as COD, total phosphorus and the like which cannot be removed by biochemical treatment are further removed, and the effluent reaches the standard and is discharged outside.
Preferably, in step (1), the pH of the wastewater is adjusted to 7.
In any of the above schemes, the detailed steps in step (2) are preferably: lifting the wastewater into a primary sedimentation tank by using a lifting pump, removing larger particulate impurities, allowing the supernatant to enter an air flotation machine, removing oil substances in the wastewater, allowing the effluent to enter a hydrolysis acidification tank for pre-acidification treatment, introducing steam into the hydrolysis acidification tank, and adjusting the water temperature to about 35 ℃.
In any of the above schemes, preferably, in the step (4), the supernatant enters a coagulation tank, and then coagulant polymeric ferric sulfate and coagulant aid polyacrylamide are added for coagulation.
The process flow of the invention is as follows:
and discharging the abamectin production wastewater into an adjusting tank, carrying out water quality and water quantity equalization, adding liquid caustic soda, and adjusting the pH of the wastewater to about 7. The method comprises the steps of lifting waste water into a primary sedimentation tank by using a lifting pump, removing larger particulate impurities, enabling supernatant to enter an air flotation machine, removing oil substances in the waste water, enabling effluent to enter a hydrolysis acidification tank for pre-acidification treatment, introducing steam into the hydrolysis acidification tank, adjusting the water temperature to about 35 ℃, enabling the hydrolyzed and acidified waste water to enter an EGSB (expanded granular sludge bed) anaerobic reactor for anaerobic biological treatment, removing most of COD (chemical oxygen demand) in the waste water through anaerobic microorganisms, decomposing macromolecular substances such as protein and the like into micromolecular substances, enabling anaerobic effluent to enter an A/O (anoxic/oxic) tank for further biochemical treatment, and removing pollutants such as COD, ammonia nitrogen, total nitrogen and the like in the waste water by using the microorganisms. After two-stage biological treatment of EGSB and A/O, most pollutants such as COD, ammonia nitrogen, total nitrogen and the like in the wastewater are removed, the effluent is subjected to mud-water separation in a secondary sedimentation tank, the supernatant enters a coagulation tank, a coagulant of polyferric sulfate and polyacrylamide are added for coagulation, the effluent enters a tertiary sedimentation tank for mud-water separation after full reaction, the pollutants such as COD, total phosphorus and the like which cannot be removed by the biochemical treatment are further removed, and the effluent reaches the standard and is discharged outside.
As shown in fig. 1, each processing unit functions as described:
a regulating pool: the water quality and the water quantity are equalized, liquid caustic soda is added, and the pH value of the wastewater is adjusted to about 7.
Primary sedimentation tank: removing larger particulate impurities.
An air floatation machine: removing oil substances.
A hydrolysis acidification pool: the water treatment method comprises the steps of introducing steam, adjusting the water temperature to about 35 ℃, controlling anaerobic treatment under the condition containing a large amount of hydrolytic bacteria and acidifying bacteria, hydrolyzing insoluble organic matters in water into soluble organic matters by using the hydrolytic bacteria and the acidifying bacteria, and converting macromolecular substances which are difficult to biodegrade into micromolecular substances which are easy to biodegrade, so that the biodegradability of the wastewater is improved, and a good water quality environment is provided for subsequent biochemical treatment.
EGSB anaerobic reactor: compared with a common anaerobic reactor UASB (upflow anaerobic sludge blanket), the EGSB anaerobic reactor fully utilizes the anaerobic granular sludge technology, provides full upward flow velocity for the reactor through external circulation, keeps the expansion of a granular sludge bed and the mixing inside the reactor, dilutes the concentration of inlet water, reduces the toxic action of residual AVM, and greatly improves the treatment efficiency of the reactor. The COD removal rate of the EGSB anaerobic reactor can reach more than 85 percent, and macromolecular substances such as protein and the like can be decomposed into micromolecular substances, thereby providing favorable conditions for the subsequent aerobic biological treatment.
An A/O pool: (removing part of COD, total nitrogen and small part of phosphorus) AO technology connects the front-section anoxic section and the rear-section aerobic section in series, the DO of the A section is not more than 0.2mg/L, and the DO of the O section is 2-4 mg/L. Heterotrophic bacteria hydrolyze organic matters in the sewage into organic acid at an anoxic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, and insoluble organic matters are converted into soluble organic matters. When the products after anoxic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved; in the anoxic zone, heterotrophic bacteria ammoniate contaminants such as protein and fat (N in the organic chain or amino groups in amino acids) to release ammonia (NH)3、NH4+). Under the condition of sufficient oxygen supply, the nitrification of autotrophic bacteria can react NH3-N(NH4To NO by oxidation of ++)3Return to tank A under reflux control and denitrification of heterotrophic bacteria under anoxic conditions to convert NO3Reduction to molecular nitrogen (N)2) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized. In the anaerobic biodegradation system and the aerobic biodegradation system, the chroma, COD, ammonia nitrogen, phosphate, total phosphorus and the like in the wastewater are further degraded, and the ammonia in the A/O poolThe nitrogen removal rate can reach more than 92%.
A secondary sedimentation tank: and the sludge-water mixed liquid in the A/O pool enters a secondary sedimentation pool for sludge-water separation, and the supernatant enters a next-stage treatment unit.
A coagulation tank: (removing part of COD, a large amount of phosphorus and chroma) is added with coagulant polyferric sulfate and coagulant aid polyacrylamide for coagulation, the mixture enters a three-sedimentation tank for mud-water separation after full reaction, pollutants such as COD, total phosphorus, chroma and the like which cannot be removed by biochemical treatment are further removed, and effluent reaches the standard and is discharged outside. Compared with the deep treatment processes such as Fenton, iron-carbon internal electrolysis and the like, the method is simple to operate, low in cost and good in effect.
A three-sedimentation tank: and separating the sludge and water generated by the coagulation tank, wherein the supernatant can reach the standard and be discharged.
It will be understood by those skilled in the art that the method for treating abamectin wastewater according to the present invention includes any combination of the summary and the detailed description of the present invention and the parts shown in the drawings, which are not described in detail and are not intended to simplify the description. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for treating abamectin wastewater comprises the following steps in sequence:
step (1): discharging the abamectin production wastewater into an adjusting tank, carrying out water quality and water quantity equalization, adding liquid caustic soda, and adjusting the pH of the wastewater;
step (2): lifting the wastewater into a primary sedimentation tank by using a lifting pump to remove larger particulate impurities, feeding the supernatant into an air flotation machine to remove oil substances in the wastewater, and feeding the effluent into a hydrolysis acidification tank to perform pre-acidification treatment and adjust the water temperature;
and (3): after hydrolysis and acidification, the wastewater enters an EGSB anaerobic reactor for anaerobic biological treatment, most of COD in the wastewater is removed through anaerobic microorganisms, and macromolecular substances such as protein and the like are decomposed into micromolecular substances;
and (4): anaerobic effluent enters an A/O pool for further biochemical treatment, pollutants such as COD, ammonia nitrogen, total nitrogen and the like in the wastewater are removed by microorganisms, the effluent is subjected to mud-water separation in a secondary sedimentation tank, supernatant enters a coagulation tank for coagulation, the effluent enters a tertiary sedimentation tank for mud-water separation after full reaction, pollutants such as COD, total phosphorus and the like which cannot be removed by biochemical treatment are further removed, and the effluent reaches the standard and is discharged outside.
2. The method for treating abamectin wastewater as recited in claim 1, wherein in the step (1), the pH of the wastewater is adjusted to 7.
3. The method for treating abamectin wastewater according to claim 1, wherein the detailed steps in the step (2) are as follows: lifting the wastewater into a primary sedimentation tank by using a lifting pump, removing larger particulate impurities, allowing the supernatant to enter an air flotation machine, removing oil substances in the wastewater, allowing the effluent to enter a hydrolysis acidification tank for pre-acidification treatment, introducing steam into the hydrolysis acidification tank, and adjusting the water temperature to about 35 ℃.
4. The method for treating abamectin wastewater according to claim 1, wherein in the step (4), coagulant polyferric sulfate and coagulant aid polyacrylamide are added to the supernatant after the supernatant enters the coagulation tank for coagulation.
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