CN111018272A - Integrated treatment system and treatment process for erythromycin thiocyanate production wastewater - Google Patents
Integrated treatment system and treatment process for erythromycin thiocyanate production wastewater Download PDFInfo
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- CN111018272A CN111018272A CN202010047014.4A CN202010047014A CN111018272A CN 111018272 A CN111018272 A CN 111018272A CN 202010047014 A CN202010047014 A CN 202010047014A CN 111018272 A CN111018272 A CN 111018272A
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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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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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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- 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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Abstract
The invention discloses an integrated treatment system and a treatment process for erythromycin thiocyanate production wastewater. Erythromycin thiocyanate belongs to macrolide antibiotic drugs and is prepared by a biological fermentation method; the erythromycin thiocyanate production wastewater belongs to biological fermentation pharmaceutical wastewater, and has the advantages of large water quantity, high salt content, high pollutant content and biological toxicity of partial pollutants; the waste water is subjected to anaerobic fermentation, two-stage A/O, membrane process and evaporation desalting combined process for a long time, so that the anaerobic biochemical removal rate of pollutants is improved, the methane yield is increased, the aerobic sludge yield is reduced, and the economic benefit of an enterprise is improved; the two-stage A/O biochemical degradation, the membrane process and the evaporation desalting process are combined, the index content of the discharged water is reduced, the long-term technical advantage is achieved, the energy consumption is low, and the treatment effect is stable and reliable.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to an integrated treatment system and a treatment process for erythromycin thiocyanate production wastewater.
Background
Erythromycin thiocyanate belongs to macrolide antibiotics and is produced by erythromycin streptococcus, production wastewater of the erythromycin thiocyanate comprises fermentation mother liquor, mushroom dreg wastewater, filter washing wastewater and the like, main pollutants comprise mushroom dreg, a solvent, fermentation residual liquid and thiocyanate radicals, biotoxicity is high, COD content of the wastewater is 30000-70000 mg/L, meanwhile, the wastewater contains a large amount of inorganic salts such as sulfate, phosphate and sodium chloride, and the total amount can reach 1.5 percent.
The biological fermentation pharmaceutical wastewater has the characteristics of high wastewater yield, high pollutant concentration, large amount of substances which are difficult to degrade, toxic and inhibitory substances to microorganisms, high chromaticity, high suspended matter content and the like; at present, the treatment mode of the produced wastewater is to adopt a pretreatment means to reduce the treatment difficulty of the wastewater and then enter a high-efficiency anaerobic bioreactor for degradation, the pretreatment means comprises hydrolysis acidification, evaporation and coagulation, and the defects of high investment cost, unstable treatment effect, high energy consumption, high sludge yield and the like exist, and the defects of complex control conditions, poor high-load operation stability and the like exist in the high-efficiency anaerobic bioreactor such as UASB.
In conclusion, the erythromycin thiocyanate production wastewater has the characteristics of high pollutant content, high salinity, poor biodegradability and the like, and the wastewater treatment technology has the defects of high investment cost, high energy consumption, unstable treatment effect, secondary pollution, high control difficulty of treatment equipment and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an integrated treatment system and a treatment process for erythromycin thiocyanate production wastewater, and the whole wastewater treatment process is simple to operate, reduces energy consumption, reduces enterprise management difficulty, improves enterprise benefit, improves pollutant removal rate, has stable and reliable treatment effect and reduces environmental pollution by utilizing the characteristics of biological fermentation according to the erythromycin thiocyanate production process and the discharge characteristics of wastewater.
In order to solve the technical problems, the invention adopts the following technical scheme:
an integrated treatment system for erythromycin thiocyanate production wastewater, which comprises an anaerobic fermentation unit, an A/O biochemical unit, a membrane unit and an evaporation desalting unit which are sequentially connected; the anaerobic fermentation unit comprises an anaerobic fermentation tank and a sludge sedimentation tank; the anaerobic fermentation tank adopts a mechanical stirrer mode to fully mix the wastewater with the anaerobic sludge, so that the activity of the anaerobic sludge is guaranteed, the anaerobic fermentation tank stably operates, and a mechanical stirring device of the anaerobic fermentation tank is arranged at the top of the fermentation tank; the sludge sedimentation tank is low in surface load, is provided with a sludge backflow device, reduces anaerobic sludge loss, ensures the anaerobic sludge amount in the anaerobic fermentation tank, and simultaneously has longer hydraulic retention time, so that the sludge sedimentation tank has the effects of hydrolysis and acidification, the toxicity of wastewater is reduced, and the removal rate of anaerobic biochemical COD is improved;
the A/O biochemical unit comprises a primary A/O biochemical unit, a secondary A/O biochemical unit and a secondary sedimentation tank, mainly removes nitrogen elements in the wastewater, further reduces the COD content of the effluent, and realizes sludge-water separation through the secondary sedimentation tank;
the membrane unit adopts an ultrafiltration system and a reverse osmosis system; the membrane unit adopts ultrafiltration reverse osmosis membrane to get rid of a small amount of organic matter and salinity in the waste water, and the hollow fiber membrane is chooseed for use to the ultrafiltration membrane, and reverse osmosis membrane adopts dish tubular reverse osmosis membrane, and two heavy ponds are gone out water and are handled through the membrane unit, and the clear liquid is discharge to reach standard, and the concentrate gets into the evaporation desalination unit, and dirty comdenstion water flows back to anaerobic fermentation jar.
The evaporation desalting unit adopts a multi-effect evaporation desalting device, the multi-effect evaporation desalting device removes salt in the membrane concentrated solution through evaporation, and the sewage condensate water flows back to the anaerobic fermentation tank.
Furthermore, the secondary sedimentation tank is connected with the primary A/O biochemical unit and the secondary A/O biochemical unit through a sludge return pipeline.
Furthermore, a sand filter and a safety filter are sequentially arranged between the A/O biochemical unit and the membrane unit, and the sand filter and the safety filter are arranged in front of the membrane unit device, so that the waste water SS is reduced, and the stable operation of the membrane unit is ensured. The water discharged from the secondary sedimentation tank is subjected to sand filtration and a security filter to reduce the content of SS in the water, enters an ultrafiltration system, removes residual macromolecular organic matters in the wastewater, is filtered by a disc tube type reverse osmosis system to reach the standard and is discharged, and the concentrated solution of the membrane unit enters a concentrated solution collecting tank.
Further, a concentrated solution collecting tank is arranged between the membrane unit and the evaporation desalting unit.
Furthermore, the membrane unit is provided with a back washing system, the back washing system is respectively connected with the sand filter, the security filter, the ultrafiltration membrane system and the reverse osmosis membrane system, the back washing system regularly cleans equipment, and washing water returns to the anaerobic fermentation tank through a return pipeline.
The process for treating the erythromycin thiocyanate production wastewater by using the integrated treatment system comprises the following steps:
(1) the erythromycin thiocyanate production wastewater is pumped to an anaerobic fermentation tank through a wastewater pipeline, the hydraulic retention time is 30 days to 90 days, the water inflow load is 0.1-0.3 kgCOD/(mSect.) and the anaerobic sludge inoculation concentration is 20000-30000 mg/L; the COD content of the erythromycin thiocyanate production wastewater is 30000-70000 mg/L, the salt content is 1.5%, the pH value is 4-5, and the ammonia nitrogen content is 1250 mg/L; the anaerobic fermentation tank and the attached pipeline are provided with heat insulation layers and are provided with a steam heating system, and the anaerobic fermentation temperature is 33-37 ℃; the wastewater enters an anaerobic fermentation tank, is uniformly mixed with anaerobic sludge in the tank under mechanical stirring, and most suspended matters and organic pollutants in the wastewater are degraded by anaerobic microorganisms and are converted into methane and a small amount of anaerobic sludge;
(2) the sludge and water mixed effluent of the anaerobic fermentation tank enters a sludge sedimentation tank for sludge-water separation, and the surface load of the sludge sedimentation tank is 0.1-0.3 m2*h；
(3) The effluent of the sludge sedimentation tank enters an A/O biochemical unit, the A/O biochemical unit is a first-stage A/O biochemical unit and a second-stage A/O biochemical unit, the hydraulic retention time is 7 days, and the sludge load of the A/O unit is 0.1-0.2 kgCOD/(kgMLSS).
(4) Carrying out mud-water separation on the A/O effluent through a secondary sedimentation tank, and refluxing the precipitated sludge to anoxic sections of a primary A/O and a secondary A/O respectively at a reflux ratio of 3: 1;
(5) the secondary sedimentation tank effluent reduces the SS content in water through sand filtration, cartridge filter, gets into ultrafiltration system, gets rid of remaining macromolecular organic matter in the waste water, and the clear solution is up to standard after the dish tubular reverse osmosis filters and discharges, and membrane unit concentrate gets into the concentrate collecting pit, through multiple-effect evaporation plant, separates the salinity in the waste water, and dirty comdenstion water flows back to the anaerobic treatment unit via the backflow pipeline.
And (4) setting internal reflux for the first-stage A/O biochemical unit in the step (3), and refluxing the sludge water of the aerobic section to the anoxic section.
In the step (3), the tank volume ratio of the anoxic section to the aerobic section of the first-stage A/O biochemical unit is 1:3, and the tank volume ratio of the anoxic section to the aerobic section of the second-stage A/O biochemical unit is 2: 1.
The invention has the beneficial effects that: according to the anaerobic fermentation tank, anaerobic sludge is intercepted by the sludge sedimentation tank, the hydraulic retention time of the sludge sedimentation tank is long, the sludge sedimentation tank has hydrolysis acidification and a wastewater biochemical effect is improved, the hydraulic retention time of the anaerobic fermentation tank is long, the pollutant removal rate is higher than that of the conventional anaerobic technology, the subsequent treatment difficulty is reduced, the sludge yield is small, the sludge treatment cost and the operation cost are reduced, the equipment operation is simple, and the effect is stable and reliable; the membrane treatment is adopted, the effluent index is lower, the technology is advanced, the industry is advanced, the water amount for evaporating and desalting the wastewater is reduced, the energy consumption is reduced, the wastewater treatment cost is reduced, and the enterprise benefit is improved.
Drawings
FIG. 1 is a schematic structural diagram of an integrated treatment system for erythromycin thiocyanate production wastewater according to the present invention;
the system comprises a erythromycin thiocyanate production wastewater pipeline 1, an anaerobic fermentation tank 2, a sludge sedimentation tank 3, a primary A/O biochemical unit 4, a secondary A/O biochemical unit 5, a secondary sedimentation tank 6, a sludge backflow pipeline 7, a sand filter 8, a security filter 9, an ultrafiltration system 10, a reverse osmosis system 11, a backwashing system 12, a concentrated solution collecting tank 13, a multi-effect evaporation device 14 and a backflow pipeline 15.
Detailed Description
The invention is further illustrated with reference to the accompanying drawings:
an integrated treatment system for erythromycin thiocyanate production wastewater comprises a production wastewater pipeline 1, wherein the pipeline 1 pumps the production wastewater to an anaerobic fermentation tank 2 through a pump, a water outlet of the anaerobic fermentation tank 2 is connected with a sludge sedimentation tank 3, the sludge sedimentation tank 3 is provided with a water outlet and a sludge return port, the water outlet is communicated with a primary A/O biochemical unit 4, the sludge return port is communicated with a return pipeline 15, the primary A/O biochemical unit 4 is communicated with a secondary A/O biochemical unit 5, the secondary A/O biochemical unit 5 is connected with a secondary sedimentation tank 6, the secondary sedimentation tank 6 is respectively connected with the primary A/O biochemical unit 4 and the secondary A/O biochemical unit 5 through a sludge return pipeline 7, a water outlet of the secondary sedimentation tank 6 is connected with a sand filter 8, the outlet of the sand filter 8 is pumped to a security filter 9, the outlet of the security filter 9 is pumped to an ultrafiltration system 10, and the ultrafiltration system, the reverse osmosis system 11 is provided with two clear liquid water outlets, one concentrated liquid water outlet, the clear liquid water outlet is respectively connected with the backwashing system 12 and an external discharge pipeline, the concentrated liquid water outlet is connected with a concentrated liquid collecting tank 13, the backwashing system 12 is respectively connected with the sand filter 8, the security filter 9, the ultrafiltration system 10 and the reverse osmosis system 11 through pumps and associated pipelines, the concentrated liquid collecting tank 13 is connected with a multi-effect evaporation device 14, and the water discharged from the multi-effect evaporation device 14 is connected with the anaerobic fermentation tank 2 through a backflow pipeline 15.
The process flow is as follows:
1. the production wastewater is pumped to an anaerobic fermentation tank through a pipeline, the hydraulic retention time is 30 days to 90 days, the water inflow load is 0.1-0.3 kgCOD/(mSed), and the inoculation concentration of anaerobic sludge is 20000-30000 mg/L;
2. the wastewater enters an anaerobic fermentation tank and is uniformly mixed with anaerobic sludge in the tank under the mechanical stirring, and most suspended matters and organic pollutants in the wastewater are degraded by anaerobic microorganisms and converted into methane and a small amount of anaerobic sludge.
3. And (3) feeding the sludge and water mixed effluent of the fermentation tank into a sludge sedimentation tank for sludge-water separation, wherein the surface load of the sludge sedimentation tank is 0.1-0.3 m harvest/m 2 x h.
And 4, the A/O biochemical unit is a two-stage A/O biochemical unit, the hydraulic retention time is 7 days, the tank volume ratio of the anoxic section to the aerobic section of the first-stage biochemical unit is 1:3, the tank volume ratio of the anoxic section to the aerobic section of the second-stage biochemical unit is 2:1, the sludge load of the A/O unit is 0.1-0.2 kgCOD/(kgMLSS), and the A/O biochemical unit removes total nitrogen in the wastewater and further reduces pollutants in the water.
5. The first-stage A/O is provided with internal reflux, and mud water in the aerobic section is refluxed to the anoxic section.
And 6, performing sludge-water separation on the A/O effluent through a secondary sedimentation tank, and refluxing the precipitated sludge to anoxic sections of the first-level A/O and the second-level A/O respectively at a reflux ratio of 3: 1.
7. The effluent of the secondary sedimentation tank is subjected to sand filtration and a security filter to reduce the content of SS (suspended solid) in water, enters an ultrafiltration membrane system, removes residual macromolecular organic matters in wastewater, the clear liquid is filtered by a disc tube type reverse osmosis membrane and then is discharged up to the standard, and the concentrated liquid of the membrane unit enters a concentrated liquid collecting tank.
8. The membrane unit is provided with a back washing system, equipment is cleaned regularly, and washing water returns to the anaerobic fermentation tank through a return pipeline.
9. The concentrated solution of the membrane unit passes through a multi-effect evaporation device, salt in the wastewater is separated, and the sewage condensate water flows back to the anaerobic treatment unit.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. 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. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an integrated processing system of erythromycin thiocyanate waste water which characterized in that: comprises an anaerobic fermentation unit, an A/O biochemical unit, a membrane unit and an evaporation desalting unit which are connected in sequence; the anaerobic fermentation unit comprises an anaerobic fermentation tank (2) and a sludge sedimentation tank (3); the A/O biochemical unit comprises a primary A/O biochemical unit (4), a secondary A/O biochemical unit (5) and a secondary sedimentation tank (6); the membrane unit adopts an ultrafiltration system (10) and a reverse osmosis system (11); the evaporation desalting unit adopts a multi-effect evaporation desalting device (14).
2. The integrated treatment system for erythromycin thiocyanate production wastewater according to claim 1, characterized in that: the secondary sedimentation tank is connected with the primary A/O biochemical unit and the secondary A/O biochemical unit through a sludge return pipeline (7).
3. The integrated treatment system for erythromycin thiocyanate production wastewater according to claim 1, characterized in that: a sand filter (8) and a security filter (9) are sequentially arranged between the A/O biochemical unit and the membrane unit.
4. The integrated treatment system for erythromycin thiocyanate production wastewater according to claim 1, characterized in that: and a concentrated solution collecting tank (13) is arranged between the membrane unit and the evaporation desalting unit.
5. The erythromycin thiocyanate industrial wastewater integrated treatment system according to claim 3, characterized in that: the membrane unit is provided with a back washing system (12), and the back washing system (12) is respectively connected with the sand filter (8), the cartridge filter (9), the ultrafiltration system (10) and the reverse osmosis system (11).
6. The process for treating the erythromycin thiocyanate production wastewater by using the integrated treatment system as claimed in claim 4, characterized by comprising the steps of:
(1) pumping the production wastewater to an anaerobic fermentation tank through a wastewater pipeline (1), wherein the hydraulic retention time is 30 days to 90 days, the water inflow load is 0.1-0.3 kgCOD/(mSect), and the anaerobic sludge inoculation concentration is 20000-30000 mg/L;
(2) the sludge and water mixed effluent of the anaerobic fermentation tank enters a sludge sedimentation tank for sludge-water separation, and the surface load of the sludge sedimentation tank is 0.1-0.3 m2*h；
(3) The effluent of the sludge sedimentation tank enters an A/O biochemical unit, the A/O biochemical unit is a first-stage A/O biochemical unit and a second-stage A/O biochemical unit, the hydraulic retention time is 7 days, and the sludge load of the A/O unit is 0.1-0.2 kgCOD/(kgMLSS).
(4) Carrying out mud-water separation on the A/O effluent through a secondary sedimentation tank, and refluxing the precipitated sludge to anoxic sections of a primary A/O and a secondary A/O respectively at a reflux ratio of 3: 1;
(5) the effluent of the secondary sedimentation tank is subjected to sand filtration and SS content reduction in water by a security filter, enters an ultrafiltration membrane system, and is used for removing residual macromolecular organic matters in wastewater, the clear liquid is subjected to standard discharge after being filtered by a disc tube type reverse osmosis membrane, the concentrated liquid of the membrane unit enters a concentrated liquid collecting tank, salt in the wastewater is separated by a multi-effect evaporation device, and the sewage condensate water flows back to an anaerobic treatment unit through a backflow pipeline (15).
7. The erythromycin thiocyanate industrial wastewater integrated treatment process according to claim 6, characterized in that: and (4) setting internal reflux for the first-stage A/O biochemical unit in the step (3), and refluxing the sludge water of the aerobic section to the anoxic section.
8. The erythromycin thiocyanate industrial wastewater integrated treatment process according to claim 6, characterized in that: in the step (3), the tank volume ratio of the anoxic section to the aerobic section of the first-stage A/O biochemical unit is 1:3, and the tank volume ratio of the anoxic section to the aerobic section of the second-stage A/O biochemical unit is 2: 1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794536A (en) * | 2020-12-21 | 2021-05-14 | 伊犁川宁生物技术股份有限公司 | Penicillin waste acid water treatment method and recycling method thereof |
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| CN109354347A (en) * | 2018-12-25 | 2019-02-19 | 河南君和环保科技有限公司 | A kind of processing method of neomycinsulphate production waste water |
| CN109354348A (en) * | 2018-12-27 | 2019-02-19 | 河南君和环保科技有限公司 | The integrated processing method of vitamin B12 production waste water |
| CN109534621A (en) * | 2019-01-04 | 2019-03-29 | 河南君和环保科技有限公司 | A kind of integrated treatment process of riboflavin production waste water |
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2020
- 2020-01-16 CN CN202010047014.4A patent/CN111018272A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090250394A1 (en) * | 2005-11-17 | 2009-10-08 | Australian Nuclear Science And Technology Organisa | Sewage treatment |
| CN105217883A (en) * | 2015-09-16 | 2016-01-06 | 成都美富特膜科技有限公司 | Based on the garbage burning factory percolate treating process of special membrane |
| CN109354347A (en) * | 2018-12-25 | 2019-02-19 | 河南君和环保科技有限公司 | A kind of processing method of neomycinsulphate production waste water |
| CN109354348A (en) * | 2018-12-27 | 2019-02-19 | 河南君和环保科技有限公司 | The integrated processing method of vitamin B12 production waste water |
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