CN112607975A - Comprehensive treatment method of cutting fluid wastewater - Google Patents
Comprehensive treatment method of cutting fluid wastewater Download PDFInfo
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- CN112607975A CN112607975A CN202011567261.3A CN202011567261A CN112607975A CN 112607975 A CN112607975 A CN 112607975A CN 202011567261 A CN202011567261 A CN 202011567261A CN 112607975 A CN112607975 A CN 112607975A
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F1/44—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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- 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
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F2001/007—Processes including a sedimentation step
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- 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
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
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- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
- C02F3/28—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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Abstract
The invention relates to the technical field of chip-containing liquid wastewater treatment, in particular to a comprehensive treatment method of cutting liquid wastewater, which comprises the following treatment steps: s1, feeding machining cutting waste liquid generated in a workshop into an oil separation collecting tank, then feeding the waste liquid into a total regulating tank, and respectively collecting other waste liquid and then feeding the other waste liquid into the total regulating tank; s2, pumping the wastewater in the main adjusting tank into an oil separation tank through a lift pump, then enabling the wastewater to automatically flow into a demulsification tank, then enabling the wastewater to enter a mixed flocculation tank, and enabling the wastewater to enter an air floatation tank after flocculation and mixing; s3, performing biochemical treatment in an anaerobic tank and an anoxic tank; s4, the wastewater after biochemical treatment enters an MBR water tank again to carry out solid-liquid separation on the wastewater; s5, after the MBR produced water passes through the reverse osmosis membrane system and is treated by the reverse osmosis system, the concentrated water nano tube removes salt and partial organic matters in the wastewater, the water quality requirement of reuse water is met, and the device has the characteristics of high practicability, high efficiency, reliability, stability, high automation degree and the like, and is low in treatment cost, simple and convenient to operate, high in removal rate and recyclable.
Description
Technical Field
The invention relates to the technical field of chip-containing liquid wastewater treatment, in particular to a comprehensive treatment method of cutting liquid wastewater.
Background
The cutting fluid is an industrial fluid used for cooling and lubricating cutters and workpieces in the metal cutting and grinding process, is formed by scientifically compounding and matching various super-strong functional additives, and has the characteristics of good cooling performance, lubricating performance, antirust performance, oil removal and cleaning functions, anticorrosion function and easiness in dilution. The defects that the traditional soap-based emulsion is easy to smell in summer, difficult to dilute in winter and poor in antirust effect are overcome, the lathe paint is not affected, and the soap-based emulsion is suitable for cutting and grinding ferrous metal and belongs to the most advanced grinding product at present. The cutting fluid has various indexes superior to those of saponified oil, has the characteristics of good cooling, cleaning, rust prevention and the like, and has the characteristics of no toxicity, no odor, no corrosion to human bodies, no corrosion to equipment, no pollution to the environment and the like.
However, after long-term use, the cutting fluid is deteriorated and destroyed by high temperature and action of microorganisms, and thus, high-concentration waste water of the cutting fluid is generated, which cannot be directly discharged and needs to be treated.
In order to reduce the pollution of the cutting fluid to the environment to the maximum extent, save national resources and realize sustainable development, it becomes important to find an effective wastewater treatment method, so that a comprehensive treatment method of the cutting fluid wastewater is needed.
Disclosure of Invention
The invention aims to provide a comprehensive treatment method of cutting fluid wastewater, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a comprehensive treatment method of cutting fluid wastewater comprises the following treatment steps:
s1, feeding machining cutting waste liquid generated in a workshop into an oil separation collecting tank, then feeding the waste liquid into a total regulating tank, and respectively collecting other waste liquid and then feeding the other waste liquid into the total regulating tank;
s2, pumping the wastewater in the main adjusting tank into an oil separation tank through a lift pump, then enabling the wastewater to automatically flow into a demulsification tank, then enabling the wastewater to enter a mixed flocculation tank, and enabling the wastewater to enter an air floatation tank after flocculation and mixing;
s3, performing biochemical treatment in an anaerobic tank and an anoxic tank;
s4, the wastewater after biochemical treatment enters an MBR water tank again to carry out solid-liquid separation on the wastewater;
and S5, after the MBR produced water passes through the reverse osmosis membrane system and is treated by the reverse osmosis system, the salt and partial organic matters in the wastewater are removed by the concentrated water nano-tube, the water quality requirement of the reuse water is met, and the fresh water is recycled.
Preferably, the wastewater in the S2 adjusting tank is pumped into an oil separation tank through a lift pump, then automatically flows into a demulsification tank, a demulsifier is added after the pH is adjusted, PAC and PAM are added, the flocculated wastewater enters an air flotation machine, and the oil separation demulsification, coagulation and air flotation are integrated.
Preferably, S3 carries out biochemical treatment through anaerobism pond and oxygen deficiency pond, and the suction pump carries the waste water extraction to the anaerobism pond in the reaction, and adopts electric mixer to stir gently the anaerobism pond and release the phosphorus ammoniation, then carries waste water to the reaction in the oxygen deficiency pond, and electric mixing shaft carries out the stirring reaction gently to the oxygen deficiency pond, carries out the denitrogenation to waste water and handles, and the waste water after the denitrogenation carries out aerobic reaction and nitrifies the absorption phosphorus to waste water and take out BOD.
Preferably, the S4 realizes the solid-liquid separation of the wastewater through the action of a self-priming pump and a membrane, the aperture of an MBR biological membrane is about 0.01um, the retention rate of suspended particles exceeds 99 percent, and the turbidity treatment of the sewage also exceeds 90 percent.
Preferably, the S2 is dosed by PH controller and PLC.
Preferably, the S3 is subjected to biochemical treatment in an anaerobic tank and an anoxic tank, and anaerobic bacteria and aerobic bacteria are added to carry out biodegradation on organic matters in the wastewater, and finally the organic matters are decomposed into carbon dioxide and water.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the cutting fluid is mixed with other waste water after being pretreated, so that the overall COD concentration is reduced; the process flow is simple, and the automatic operation of a wastewater treatment facility is easy to realize; the operation and management are simple and convenient, and the operation cost is reduced by adding the medicament through control methods such as a PH controller, a PLC and the like; by adopting an MBR + RO process, recycling of part of sewage is realized, and part of water is discharged after reaching the standard; the method has the characteristics of high practicability, high efficiency, reliability, stability, high automation degree and the like, is low in treatment cost, simple and convenient in operation, high in removal rate and recyclable, reduces pollution of cutting fluid to the environment to the maximum extent, and realizes sustainable development of the machining industry.
Drawings
FIG. 1 is a process flow diagram of the treatment method of the present 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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
a comprehensive treatment method of cutting fluid wastewater comprises the following treatment steps:
s1, feeding machining cutting waste liquid generated in a workshop into an oil separation collecting tank, then feeding the waste liquid into a total regulating tank, and respectively collecting other waste liquid and then feeding the other waste liquid into the total regulating tank;
s2, pumping the wastewater in the main adjusting tank into an oil separation tank through a lift pump, then enabling the wastewater to automatically flow into a demulsification tank, then enabling the wastewater to enter a mixed flocculation tank, and enabling the wastewater to enter an air floatation tank after flocculation and mixing;
s3, performing biochemical treatment in an anaerobic tank and an anoxic tank;
s4, the wastewater after biochemical treatment enters an MBR water tank again to carry out solid-liquid separation on the wastewater;
and S5, after the MBR produced water passes through the reverse osmosis membrane system and is treated by the reverse osmosis system, the salt and partial organic matters in the wastewater are removed by the concentrated water nano-tube, the water quality requirement of the reuse water is met, and the fresh water is recycled.
And pumping the wastewater in the S2 regulating tank into an oil separation tank through a lift pump, then automatically flowing into a demulsification tank, adding a demulsifier after regulating the pH, then adding PAC and PAM, flocculating, then entering an air flotation machine, and performing oil separation, demulsification, coagulation and air flotation to form an integrated machine.
S3 carries out biochemical treatment through anaerobism pond and oxygen deficiency pond, and the suction pump carries the waste water extraction to the anaerobism pond in the reaction, and adopts electric agitator to stir gently the anaerobism pond and release the phosphorus ammoniation, then carries waste water to the reaction in the oxygen deficiency pond, and electric stirring shaft stirs gently the reaction to the oxygen deficiency pond, carries out denitrogenation to waste water and handles, and the waste water after denitrogenation carries out aerobic reaction and nitrifies the absorption phosphorus to waste water and take out BOD.
S4 realizes the solid-liquid separation of waste water through the effect of self priming pump and membrane, and the aperture of MBR biomembrane is about 0.01um, and to suspended solid particle' S entrapment rate more than 99 percent, the turbidity of sewage was handled and has also exceeded 90 percent.
And S2 adding the medicament by using a pH controller, a PLC and other control methods.
And S3 is subjected to biochemical treatment in an anaerobic tank and an anoxic tank, and anaerobic bacteria and aerobic bacteria are added to carry out biodegradation on organic matters in the wastewater, and the organic matters are finally decomposed into carbon dioxide and water.
The cutting fluid is mixed with other waste water after being pretreated, so that the overall COD concentration is reduced; the process flow is simple, and the automatic operation of a wastewater treatment facility is easy to realize; the operation and management are simple and convenient, and the operation cost is reduced by adding the medicament through control methods such as a PH controller, a PLC and the like; by adopting an MBR + RO process, recycling of part of sewage is realized, and part of water is discharged after reaching the standard; the method has the characteristics of high practicability, high efficiency, reliability, stability, high automation degree and the like, is low in treatment cost, simple and convenient in operation, high in removal rate and recyclable, reduces pollution of cutting fluid to the environment to the maximum extent, and realizes sustainable development of the machining industry.
Example (b): machining cutting waste liquid generated in a workshop enters an oil separation collecting tank and then enters a main regulating tank, and other waste liquid is respectively collected and then enters the main regulating tank; pumping the wastewater in the total regulating tank into an oil separation tank through a lift pump, then automatically flowing into a demulsification tank, adding a demulsifier after regulating the pH, then adding PAC and PAM, adding medicaments by using control methods such as a pH controller and a PLC (programmable logic controller), flocculating, then entering an air flotation machine, and performing oil separation, demulsification, coagulation and air flotation to form an integrated machine; the water pump pumps the wastewater to the anaerobic tank for reaction, an electric stirrer is adopted to slightly stir the anaerobic tank for releasing phosphorus for ammoniation, then the wastewater is conveyed to the anoxic tank for reaction, an electric stirring shaft slightly stirs the anoxic tank for reaction, the wastewater is denitrified, the wastewater after denitrification is subjected to aerobic reaction for nitrifying and absorbing phosphorus for wastewater to take out BOD, anaerobic bacteria and aerobic bacteria are added for biodegradation of organic matters in the wastewater, the organic matters are finally decomposed into carbon dioxide and water, the wastewater after biochemical treatment in the anaerobic tank and the anoxic tank enters the MBR tank, solid-liquid separation of the wastewater is realized through the action of a self-priming pump and a membrane, the aperture of an MBR biological membrane is about 0.01um, the retention rate of suspended particles exceeds 99 percent, and the turbidity treatment of the wastewater also exceeds 90 percent; MBR produces water and passes through reverse osmosis membrane system, and reverse osmosis system handles the back, and the salt and some organic matters in the waste water are got rid of to dense water receiving pipe, reach the quality of water requirement of reuse water, fresh water recycle.
| Cutting fluid | Water content (mg/L) | Effluent content (mg/L) | Removal Rate (%) |
| COD | 8220 | ||
| Mixing waste water | |||
| COD | 3220 | 25 (fresh water) | 99.2％ |
| 178 (dense water) | 94.5％ |
The cutting fluid is mixed with other waste water after being pretreated, so that the overall COD concentration is reduced; the process flow is simple, and the automatic operation of a wastewater treatment facility is easy to realize; the operation and management are simple and convenient, and the operation cost is reduced by adding the medicament through control methods such as a PH controller, a PLC and the like; by adopting an MBR + RO process, recycling of part of sewage is realized, and part of water is discharged after reaching the standard; the method has the characteristics of high practicability, high efficiency, reliability, stability, high automation degree and the like, is low in treatment cost, simple and convenient in operation, high in removal rate and recyclable, reduces pollution of cutting fluid to the environment to the maximum extent, and realizes sustainable development of the machining industry.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A comprehensive treatment method of cutting fluid wastewater is characterized by comprising the following steps: the method comprises the following processing steps:
s1, feeding machining cutting waste liquid generated in a workshop into an oil separation collecting tank, then feeding the waste liquid into a total regulating tank, and respectively collecting other waste liquid and then feeding the other waste liquid into the total regulating tank;
s2, pumping the wastewater in the main adjusting tank into an oil separation tank through a lift pump, then enabling the wastewater to automatically flow into a demulsification tank, then enabling the wastewater to enter a mixed flocculation tank, and enabling the wastewater to enter an air floatation tank after flocculation and mixing;
s3, performing biochemical treatment in an anaerobic tank and an anoxic tank;
s4, the wastewater after biochemical treatment enters an MBR water tank again to carry out solid-liquid separation on the wastewater;
and S5, after the MBR produced water passes through the reverse osmosis membrane system and is treated by the reverse osmosis system, the salt and partial organic matters in the wastewater are removed by the concentrated water nano-tube, the water quality requirement of the reuse water is met, and the fresh water is recycled.
2. The comprehensive treatment method of cutting fluid wastewater according to claim 1, characterized in that: and pumping the wastewater in the S2 regulating tank into an oil separation tank through a lift pump, then automatically flowing into a demulsification tank, adding a demulsifier after regulating the pH, then adding PAC and PAM, flocculating, then entering an air flotation machine, and performing oil separation, demulsification, coagulation and air flotation to form an integrated machine.
3. The comprehensive treatment method of cutting fluid wastewater according to claim 1, characterized in that: s3 carries out biochemical treatment through anaerobism pond and oxygen deficiency pond, and the suction pump carries the waste water extraction to the anaerobism pond in the reaction, and adopts electric agitator to stir gently the anaerobism pond and release the phosphorus ammoniation, then carries waste water to the reaction in the oxygen deficiency pond, and electric stirring shaft stirs gently the reaction to the oxygen deficiency pond, carries out denitrogenation to waste water and handles, and the waste water after denitrogenation carries out aerobic reaction and nitrifies the absorption phosphorus to waste water and take out BOD.
4. The comprehensive treatment method of cutting fluid wastewater according to claim 1, characterized in that: s4 realizes the solid-liquid separation of waste water through the effect of self priming pump and membrane, and the aperture of MBR biomembrane is about 0.01um, and to suspended solid particle' S entrapment rate more than 99 percent, the turbidity of sewage was handled and has also exceeded 90 percent.
5. The comprehensive treatment method of cutting fluid wastewater according to claims 1-2, characterized in that: and S2 adding the medicament by using a pH controller, a PLC and other control methods.
6. The comprehensive treatment method of cutting fluid wastewater according to claim 3, characterized in that: and S3 is subjected to biochemical treatment in an anaerobic tank and an anoxic tank, and anaerobic bacteria and aerobic bacteria are added to carry out biodegradation on organic matters in the wastewater, and the organic matters are finally decomposed into carbon dioxide and water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912247A (en) * | 2021-09-23 | 2022-01-11 | 江苏钦越环保科技有限公司 | Comprehensive treatment process for high-concentration emulsion |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204001A (en) * | 1991-10-09 | 1993-04-20 | Zenon Environmental Inc. | Membrane bioreactor system for treating synthetic metal-working fluids and oil-based products |
| CN105585218A (en) * | 2016-01-13 | 2016-05-18 | 梧州市华鸿污水处理有限公司 | Machining wastewater treatment technology |
| CN109626727A (en) * | 2018-12-25 | 2019-04-16 | 苏州依斯倍环保装备科技有限公司 | A kind of Zero discharge treatment method and system machining waste water |
| CN110510808A (en) * | 2019-08-19 | 2019-11-29 | 东莞市逸轩环保科技有限公司 | Metal cutting waste liquid environment protection emission processing system |
| CN111925064A (en) * | 2020-08-18 | 2020-11-13 | 安徽省巨仁环境技术有限公司 | Treatment process method of oily wastewater of metal cutting fluid |
-
2020
- 2020-12-25 CN CN202011567261.3A patent/CN112607975A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204001A (en) * | 1991-10-09 | 1993-04-20 | Zenon Environmental Inc. | Membrane bioreactor system for treating synthetic metal-working fluids and oil-based products |
| CN105585218A (en) * | 2016-01-13 | 2016-05-18 | 梧州市华鸿污水处理有限公司 | Machining wastewater treatment technology |
| CN109626727A (en) * | 2018-12-25 | 2019-04-16 | 苏州依斯倍环保装备科技有限公司 | A kind of Zero discharge treatment method and system machining waste water |
| CN110510808A (en) * | 2019-08-19 | 2019-11-29 | 东莞市逸轩环保科技有限公司 | Metal cutting waste liquid environment protection emission processing system |
| CN111925064A (en) * | 2020-08-18 | 2020-11-13 | 安徽省巨仁环境技术有限公司 | Treatment process method of oily wastewater of metal cutting fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912247A (en) * | 2021-09-23 | 2022-01-11 | 江苏钦越环保科技有限公司 | Comprehensive treatment process for high-concentration emulsion |
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Application publication date: 20210406 |