CN114956451A - Moxidectin wastewater treatment method - Google Patents
Moxidectin wastewater treatment method Download PDFInfo
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- CN114956451A CN114956451A CN202210523072.9A CN202210523072A CN114956451A CN 114956451 A CN114956451 A CN 114956451A CN 202210523072 A CN202210523072 A CN 202210523072A CN 114956451 A CN114956451 A CN 114956451A
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- YZBLFMPOMVTDJY-CBYMMZEQSA-N moxidectin Chemical compound O1[C@H](C(\C)=C\C(C)C)[C@@H](C)C(=N/OC)\C[C@@]11O[C@H](C\C=C(C)\C[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 YZBLFMPOMVTDJY-CBYMMZEQSA-N 0.000 title claims abstract description 40
- 229960004816 moxidectin Drugs 0.000 title claims abstract description 40
- 238000004065 wastewater treatment Methods 0.000 title claims description 12
- 239000002351 wastewater Substances 0.000 claims abstract description 98
- 239000011347 resin Substances 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 238000000855 fermentation Methods 0.000 claims abstract description 26
- 230000004151 fermentation Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 230000003647 oxidation Effects 0.000 claims abstract description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 11
- 239000010802 sludge Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000012163 sequencing technique Methods 0.000 claims abstract description 8
- 241000894006 Bacteria Species 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 244000005700 microbiome Species 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 239000006004 Quartz sand Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000002203 pretreatment Methods 0.000 abstract 1
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 238000005086 pumping Methods 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 7
- 230000020477 pH reduction Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 241000187747 Streptomyces Species 0.000 description 2
- 230000000507 anthelmentic effect Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003120 macrolide antibiotic agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VFEDRRNHLBGPNN-UHFFFAOYSA-N nimustine Chemical class CC1=NC=C(CNC(=O)N(CCCl)N=O)C(N)=N1 VFEDRRNHLBGPNN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010511 deprotection reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229960001420 nimustine Drugs 0.000 description 1
- 238000006146 oximation reaction Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C02F2209/14—NH3-N
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Abstract
The invention discloses a method for treating moxidectin wastewater, wherein the moxidectin production wastewater comprises fermentation wastewater and synthetic extraction wastewater, and the treatment method comprises the following steps: (1) carrying out anaerobic treatment on the fermentation wastewater by an anaerobic baffle reactor; (2) adopting XAD1600 resin to pretreat, synthesize and extract wastewater; (3) mixing and homogenizing the fermentation wastewater after the anaerobic biochemical treatment in the step (1) and the synthetic extraction wastewater after the resin pretreatment in the step (2), and treating by adopting a sequencing batch activated sludge process; (4) and (4) carrying out advanced treatment on the wastewater treated by the sequencing batch activated sludge process in the step (3) by adopting ozone oxidation. The method realizes the stable and efficient removal of various pollutants in the moxidectin wastewater, wherein the special-effect bacterium feeding method and the pretreatment method of the resin adsorption wastewater have the advantages of high treatment efficiency, low treatment cost, stable and reliable operation and the like.
Description
Technical Field
The invention relates to the technical field of pharmaceutical chemistry, in particular to a moxidectin wastewater treatment method.
Background
Moxidectin is a novel macrolide anthelmintic antibiotic with broad spectrum, high efficiency and wide application in veterinary clinic, is a semi-synthetic macrolide drug with single component generated by fermentation of streptomyces, has good anthelmintic activity, and has the characteristics of long acting, safety and the like. Moxidectin is a derivative of nimustine, and is prepared mainly by producing nimustine through streptomyces fermentation and then modifying through four steps of protection, oxidation, oximation and deprotection.
The moxidectin production wastewater is high-concentration organic wastewater, has the characteristics of high chroma, high salinity, high COD, high BOD and the like, and is difficult to treat. The wastewater contains a large amount of harmful substances such as sugar, protein, SS, ammonia nitrogen and dichloromethane, and the random discharge of the harmful substances wastes resources and causes serious environmental pollution, so that the finding of an applicable treatment technology is the only way for treating the moxidectin wastewater.
Disclosure of Invention
In order to solve the defects in the background technology, the invention aims to provide a method for treating moxidectin wastewater, which is characterized in that fermentation wastewater after anaerobic biochemical treatment and synthetic extraction wastewater after resin pretreatment are mixed in average value and then subjected to aerobic biochemical treatment and ozone oxidation advanced treatment, and finally, the stable and efficient removal of various pollutants in the wastewater is realized.
The purpose of the invention can be realized by the following technical scheme:
a method for treating moxidectin wastewater, which comprises the following steps:
(1) carrying out anaerobic treatment on the fermentation wastewater with high COD and residual titer discharged by a production workshop through an anaerobic baffle reactor, and adding EM (effective microorganisms) bacteria into the anaerobic baffle reactor to increase the removal of the residual titer of the fermentation wastewater;
(2) XAD1600 resin is adopted for pretreatment, synthesis and extraction of wastewater, harmful substances in the wastewater are removed, and the biodegradability of the wastewater is improved;
(3) mixing and homogenizing the fermentation wastewater after the anaerobic biochemical treatment in the step (1) and the synthetic extraction wastewater after the resin pretreatment in the step (2), and then treating by adopting a sequencing batch activated sludge process to remove COD pollutants and ammonia nitrogen pollutants;
(4) and (4) carrying out advanced treatment on the wastewater treated by the sequencing batch activated sludge process in the step (3) by adopting ozone oxidation, further removing biochemical non-degradable pollutants, and discharging the pollutants up to the standard.
Further preferably, the control conditions of the anaerobic baffled reactor in the step (1) are as follows: the adding amount of EM bacteria is 1-2%, the temperature is 20-35 ℃, the pH value is 6.5-8.0, and the retention time is 2-5 d.
Further preferably, the control conditions of the pretreatment using the resin XAD1600 in step (2) are: the flow rate of inflow water is 1-5m 3 And h, performing resin regeneration treatment after the wastewater treatment volume is 20-30 times of the resin volume.
Further preferably, the resin regeneration in step (2) is carried out by treating with 4mol/L hydrochloric acid and 6mol/L alkali solution.
Further preferably, the control conditions of the sequencing batch activated sludge process in the step (3) are as follows: volume load of 0.1-0.35 kg/(m) 3 D), a hydraulic retention time of 3-5d, a pH of 7.0-8.5 and a temperature of 25-37 ℃.
Further preferably, the control conditions of the ozone oxidation in the step (4) are as follows: the pH value of the oxidation reaction is 4.0-6.0, the addition amount of ozone is 100-200mg/L, the oxidation reaction time is 2-4h, the pH value is adjusted to 6.0-8.0 after the ozone oxidation, and the wastewater is discharged after the solid-liquid separation in a quartz sand filter.
The invention has the beneficial effects that:
according to the method, most of COD (chemical oxygen demand) in the fermentation wastewater produced by moxidectin is removed through an Anaerobic Baffled Reactor (ABR), and EM (effective microorganisms) are added into the ABR to reduce the titer of the residual in the wastewater, so that the inhibition effect of the residual titer in the wastewater on biochemical treatment is reduced; carrying out adsorption treatment on the synthetic extraction wastewater produced by the Xikeding with XAD1600 resin to remove harmful substances such as dichloromethane and the like; mixing the fermentation wastewater after anaerobic biochemical treatment and the synthetic extraction wastewater after resin pretreatment, and then performing aerobic biochemical treatment and ozone oxidation advanced treatment to finally realize the stable and efficient removal of each pollutant in the wastewater; the method for pretreating the resin adsorption wastewater by adopting the special-effect bacterium feeding method has the advantages of high treatment efficiency, low treatment cost, stable and reliable operation and the like.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the moxidectin wastewater treatment process of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In this example, the wastewater from Moxidectin production to be treated was as follows,
60m of fermentation wastewater of moxidectin 3 The water quality is as follows: COD is 31000mg/L, ammonia nitrogen is 600mg/L, suspended matter SS is 3800mg/L, pH value is 8.8, titer is 320 mg/L; synthetic extraction wastewater of 20m 3 The water quality is as follows: the COD was 27000mg/L, the dichloromethane residue was 1600mg/L, the total salt content was 2.0 wt%, and the pH was 7.2.
The wastewater is treated by the following method:
(1) adjusting the pH value of the moxidectin fermentation wastewater to 6.5 in an adjusting tank, pumping the moxidectin fermentation wastewater to an anaerobic baffled reactor, adding 3000kg of EM (effective microorganisms) into an anaerobic tank, wherein the anaerobic operation temperature is 32 ℃, the pH value is 6.7, the retention time is 5d, the titer concentration of the wastewater after anaerobic treatment is 3500mg/L, the titer removal rate is lower than 10mg/L, and the titer removal rate is about 95%;
(2) the Moxidectin synthesis extraction wastewater enters an XAD1600 resin column filled with water through a distributor, the inflow flow rate is 2m3/h, the COD of the resin column effluent is 2300mg/L, the dichloromethane content is lower than 10mg/L, and the removal rate of the dichloromethane is more than 95%;
(3) mixing anaerobic ABR effluent and resin pretreatment effluent in an aerobic water inlet adjusting tank, controlling the temperature of the mixed wastewater to be 25 ℃ and the pH value to be about 7.5, pumping the mixed wastewater to an aerobic SBR reactor, and allowing the mixed wastewater to stay for 4 days, wherein COD (chemical oxygen demand) and ammonia nitrogen can be effectively degraded, the COD of the effluent is lower than 400mg/L, and the ammonia nitrogen is lower than 15mg/L through the nitrification and denitrification of microorganisms;
(4) and (3) controlling the pH value of the aerobic effluent to be about 4.5 by an ozone oxidation system, adding 150mg/L of O3, reacting for 3 hours in an oxidation residence time, adjusting the pH to about 7.0, discharging the wastewater after solid-liquid separation in a quartz sand filter, and discharging the wastewater with about 60 of COD (chemical oxygen demand) and about 5mg/L of ammonia nitrogen.
Example 2
In this example, the wastewater from Moxidectin production to be treated was as follows,
60m of fermentation wastewater of moxidectin 3 The water quality is as follows: COD is 31000mg/L, ammonia nitrogen is 600mg/L, suspended matter SS is 3800mg/L, pH value is 8.8, titer is 320 mg/L; synthetic extraction wastewater of 20m 3 The water quality is as follows: the COD was 27000mg/L, the dichloromethane residue was 1600mg/L, the total salt content was 2.0 wt%, and the pH was 7.2.
The wastewater is treated by the following method:
(1) adjusting the pH value of the moxidectin fermentation wastewater to 6.7 in an adjusting tank, pumping the moxidectin fermentation wastewater to an anaerobic baffled reactor, adding 2800kg of EM (effective microorganisms) into an anaerobic tank, keeping the anaerobic tank at the operating temperature of 31 ℃, the pH value of 7.2 and the retention time of 6d, wherein the COD (chemical oxygen demand) of the wastewater after anaerobic treatment is 3000mg/L, the titer concentration is lower than 5mg/L, and the titer removal rate is about 96%;
(2) the Moxidectin synthetic extraction wastewater enters an XAD1600 resin column filled with water through a distributor, and the water inlet flow rate is 3m 3 The COD of the effluent of the resin column is 2500mg/L, and the dichloromethane content is lower than that of the resin column7mg/L, and the removal rate of dichloromethane is more than 97 percent;
(3) mixing anaerobic ABR effluent and resin pretreatment effluent in an aerobic water inlet adjusting tank, controlling the temperature of the mixed wastewater to be 28 ℃ and the pH value to be about 7.9, pumping the mixed wastewater to an aerobic SBR reactor, and staying for 2d, wherein COD and ammonia nitrogen can be effectively degraded, the COD of the effluent is lower than 450mg/L, and the ammonia nitrogen is lower than 16mg/L through the nitrification and denitrification of microorganisms;
(4) the aerobic effluent passes through an ozone oxidation system, the pH of the influent water is controlled to be about 4.2, and O 3 Adding the drug amount to 160mg/L, carrying out oxidation retention for 3.5h, adjusting the pH to about 7.2, discharging the wastewater after solid-liquid separation in a quartz sand filter, and discharging the wastewater with about 65 COD (chemical oxygen demand) of the discharged water and about 7mg/L ammonia nitrogen.
Example 3
In this example, the wastewater from Moxidectin production to be treated was as follows,
60m of fermentation wastewater of moxidectin 3 The water quality is as follows: COD is 31000mg/L, ammonia nitrogen is 600mg/L, suspended matter SS is 3800mg/L, pH value is 8.8, and titer is 320 mg/L; synthetic extraction wastewater of 20m 3 The water quality is as follows: the COD was 27000mg/L, the dichloromethane residue was 1600mg/L, the total salt content was 2.0 wt%, and the pH was 7.2.
The wastewater is treated by the following method:
(1) adjusting the pH value of the moxidectin fermentation wastewater to 6.9 in an adjusting tank, pumping the moxidectin fermentation wastewater to an anaerobic baffled reactor, adding 2300kg of EM (effective microorganisms) into an anaerobic tank, keeping the anaerobic operation temperature at 37 ℃, the pH value at 6.2 and the retention time at 9d, wherein the COD (chemical oxygen demand) of the wastewater after anaerobic treatment is 3150mg/L, the titer concentration is lower than 8mg/L, and the titer removal rate is about 97%;
(2) the Moxidectin synthesis extraction wastewater enters an XAD1600 resin column filled with water through a distributor, the water inflow flow rate is 2.4m3/h, the COD of the resin column effluent is 2370mg/L, the dichloromethane content is lower than 12mg/L, and the removal rate of the dichloromethane is more than 96%;
(3) mixing anaerobic ABR effluent and resin pretreatment effluent in an aerobic water inlet adjusting tank, controlling the temperature of the mixed wastewater to be 20 ℃ and the pH value to be about 7.6, pumping the mixed wastewater to an aerobic SBR reactor, and allowing the mixed wastewater to stay for 3d, wherein COD (chemical oxygen demand) and ammonia nitrogen can be effectively degraded, the COD of the effluent is lower than 420mg/L, and the ammonia nitrogen is lower than 19mg/L through the nitrification and denitrification of microorganisms;
(4) and (3) controlling the pH value of the aerobic effluent to be about 3.5 by an ozone oxidation system, adding 180mg/L of O3, reacting for 4 hours in an oxidation residence time, adjusting the pH to about 7.6, discharging the wastewater after solid-liquid separation in a quartz sand filter, and discharging the wastewater with about 55 of COD (chemical oxygen demand) and about 3mg/L of ammonia nitrogen.
Comparative example 1
In the comparative example, the indexes of the moxidectin production wastewater to be treated are as follows,
60m of fermentation wastewater of moxidectin 3 The water quality is as follows: COD is 31000mg/L, ammonia nitrogen is 600mg/L, suspended matter SS is 3800mg/L, pH value is 8.8, and titer is 320 mg/L; synthetic extraction wastewater of 20m 3 The water quality is as follows: the COD was 27000mg/L, the dichloromethane residue was 1600mg/L, the total salt content was 2.0 wt%, and the pH was 7.2.
The wastewater is treated by the following method:
(1) mixing the fermentation wastewater and the synthetic wastewater according to a production ratio, and pumping the mixture into an adjusting tank, wherein the pH value of the adjusting tank is 6.2.
(2) And (3) uniformly mixing the waste water in the regulating tank, pumping the waste water into a hydrolysis acidification tank, wherein the index of the hydrolysis acidification tank is that the pH is 4.5, the sludge concentration is 3000mg/L, the effluent titer is 100mg/L, and the dichloromethane residue is 200 mg/L.
(3) And pumping the wastewater in the hydrolysis acidification tank into an aerobic activated sludge tank, controlling the dissolved oxygen to be 2-4mg/L, keeping the time to be 2d and controlling the pH to be 7.5.
(4) And discharging the aerobic effluent. The discharged COD is 3500mg/L and the ammonia nitrogen is 200 mg/L.
As can be seen from comparative example 1, after the moxidectin wastewater is treated by adopting the method of hydrolytic acidification and aerobic activated sludge, the COD removal rate is 88 percent (range value is less than 98 percent), the ammonia nitrogen removal rate is 67 percent (range value is less than 95 percent), the titer removal rate is 68 percent (range value is less than 95 percent), the dichloromethane removal rate is 87.5 percent (range value is less than 95 percent), and the examples 1-3 show that when the method is adopted to treat the moxidectin wastewater, the COD removal rate is 98 percent, the ammonia nitrogen removal rate is 95 percent, the titer removal rate is 95 percent, and the dichloromethane removal rate is 95 percent.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The moxidectin wastewater treatment method is characterized in that moxidectin production wastewater comprises fermentation wastewater and synthetic extraction wastewater, and the treatment method comprises the following steps:
(1) carrying out anaerobic treatment on the fermentation wastewater with high COD and residual titer discharged from a production workshop through an anaerobic baffle reactor, and adding EM (effective microorganisms) into the anaerobic baffle reactor to increase the residual titer of the fermentation wastewater;
(2) XAD1600 resin is adopted for pretreatment, synthesis and extraction of wastewater, harmful substances in the wastewater are removed, and the biodegradability of the wastewater is improved;
(3) mixing and homogenizing the fermentation wastewater after the anaerobic biochemical treatment in the step (1) and the synthetic extraction wastewater after the resin pretreatment in the step (2), and then treating by adopting a sequencing batch activated sludge process to remove COD pollutants and ammonia nitrogen pollutants;
(4) and (4) carrying out advanced treatment on the wastewater treated by the sequencing batch activated sludge process in the step (3) by adopting ozone oxidation, further removing biochemical non-degradable pollutants, and discharging the pollutants up to the standard.
2. The moxidectin wastewater treatment method as set forth in claim 1, wherein the anaerobic baffled reactor in the step (1) is controlled under the following conditions: the adding amount of EM bacteria is 1-2%, the temperature is 20-35 deg.C, pH is 6.5-8.0, and the retention time is 2-5 d.
3. The moxidectin wastewater treatment method as set forth in claim 1, wherein the control conditions of the pretreatment using the resin XAD1600 in the step (2) are as follows: the flow rate of inflow water is 1-5m 3 And/h, performing resin regeneration treatment after the wastewater treatment volume is 20-30 times of the resin volume.
4. The moxidectin wastewater treatment method as claimed in claim 1, wherein the resin regeneration in the step (2) is carried out by treating with 4mol/L hydrochloric acid and 6mol/L alkali solution.
5. The moxidectin wastewater treatment method as set forth in claim 1, wherein the control conditions of the sequencing batch activated sludge process in the step (3) are as follows: volume load of 0.1-0.35 kg/(m) 3 D), a hydraulic retention time of 3-5d, a pH of 7.0-8.5 and a temperature of 25-37 ℃.
6. The moxidectin wastewater treatment method as set forth in claim 1, wherein the ozone oxidation in the step (4) is controlled under the following conditions: the pH value of the oxidation reaction is 4.0-6.0, the ozone addition amount is 100-200mg/L, the oxidation reaction time is 2-4h, the pH value is adjusted to 6.0-8.0 after the ozone oxidation, and the wastewater is discharged after the solid-liquid separation in a quartz sand filter.
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