CN111925064A - Treatment process method of oily wastewater of metal cutting fluid - Google Patents
Treatment process method of oily wastewater of metal cutting fluid Download PDFInfo
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- CN111925064A CN111925064A CN202010831660.XA CN202010831660A CN111925064A CN 111925064 A CN111925064 A CN 111925064A CN 202010831660 A CN202010831660 A CN 202010831660A CN 111925064 A CN111925064 A CN 111925064A
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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
- C02F2001/007—Processes including a sedimentation step
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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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- 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
- C02F2103/16—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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
The invention relates to the technical field of sewage treatment, in particular to a process method for treating oily wastewater of metal cutting fluid; the method can be used for pretreating the oily sewage, carrying out physicochemical treatment on most oily organic matters in the sewage, and purifying the oily sewage by combining with subsequent biochemical treatment, and comprises the following steps of: s1, discharging the sewage into an oil separation tank for treatment, and feeding the sewage with part of dirty oil skimmed into an adjusting tank for homogenizing and equalizing; s2, pressurizing the sewage treated in the step S1 by a lift pump and sending the sewage into a dissolved air floatation tank; s3, the sewage treated by the S2 automatically flows into a hydrolytic acidification tank; s4, the sewage treated by the S3 flows into a biological contact oxidation pond; s5, feeding the sewage after biochemical treatment into a secondary sedimentation tank; s6, discharging floating slag generated by the dissolved air flotation tank, activated sludge generated by the hydrolysis acidification tank and the biological contact oxidation tank and residual sludge generated by the secondary sedimentation tank into a sludge concentration tank, and conveying the sludge into a spiral sludge dewatering machine by a sludge pump for dewatering.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a process method for treating oily wastewater of metal cutting fluid.
Background
As is known to all, in the production process of a production workshop, part of hydraulic oil of a machine tool leaks to the ground, oily wastewater generated by washing the ground, oily wastewater generated by cleaning an oily mop and oil-containing mop operation workers during hand washing can generate a certain amount of pollution to the surrounding environment when the oily wastewater is not treated and discharged, the oil-containing sewage generated by the part of oily sewage is small in amount and is discharged uninterruptedly, waste oil contained in the sewage is difficult to carry out biochemical decomposition, the traditional biochemical treatment method is adopted, the treatment effect is poor, certain use limitation is caused, and the organic matter which is difficult to decompose such as the waste oil contained in the sewage is difficult to treat, so that the treatment effect is
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the treatment process method of the oily wastewater of the metal cutting fluid, which can be used for pretreating the oily wastewater, carrying out physicochemical treatment on most oily organic matters in the wastewater and purifying the oily wastewater by combining with subsequent biochemical treatment, and has better treatment effect.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a treatment process method of oily wastewater of metal cutting fluid comprises the following steps:
s1, discharging the sewage into an oil separation tank for treatment, removing a large amount of floating oil on the surface by an oil skimming device, feeding part of the sewage with the dirty oil skimmed into an adjusting tank for homogenizing and equalizing the amount, and adding a demulsifier into the adjusting tank;
s2, pressurizing the sewage treated in S1 by a lift pump, sending the sewage into a dissolved air floatation tank, reacting pollutants such as emulsified oil, suspended solids with specific gravity smaller than 1 and the like in a water body with a medicament to generate alum blossom substances through processes such as coagulation, air-water contact, solid-liquid separation and the like of an air floatation system, floating up to the water surface of the air floatation tank under the carrying of the dissolved air water, and removing the alum blossom substances by a residue scraper;
the sewage treated by the S3 and S2 automatically flows into a hydrolysis acidification tank, and macromolecular organic matters are decomposed under the action of hydrolytic bacteria, so that the biodegradability is improved;
s4, the sewage treated in S3 flows into a biological contact oxidation pond, organic matters in raw water are biochemically degraded through the metabolism of aerobic bacteria on the organic matters, and the aerobic microorganisms are attached to the filler, so that the propagation and the survival of the bacteria are facilitated;
s5, feeding the sewage after biochemical treatment into a secondary sedimentation tank, realizing sludge-water separation under the action of gravity, and discharging the supernatant after reaching the standard;
s6, discharging scum generated by the dissolved air flotation tank, activated sludge generated by the hydrolysis acidification tank and the biological contact oxidation tank and residual sludge generated by the secondary sedimentation tank into a sludge concentration tank, wherein supernatant in the sludge concentration tank reflows to the regulating tank, sludge is sent to a spiral sludge dewatering machine by a sludge pump for dewatering treatment, mud cakes are treated by periodic outward transportation, and filtrate reflows to the regulating tank.
Preferably, an oil skimming device is arranged in the oil separation tank, and the oil skimming device performs oil skimming operation once every 24 hours.
Preferably, the inner wall of the oil separation tank is provided with an electric heating pipe, and the temperature of water in the oil separation tank is 20-30 ℃.
Preferably, a demulsifier dosing device is arranged in the regulating reservoir.
Preferably, the dissolved air flotation tank is provided with a dissolved air flotation machine, a PAC dosing pump, a PAM dosing pump, an alkali liquor dosing pump and a dosing cylinder which is arranged corresponding to the PAC dosing pump, the PAM dosing pump and the alkali liquor dosing pump, a coagulation stirring device is arranged in the dosing cylinder, and a slag scraping machine is arranged at the upper part in the dissolved air flotation tank.
Preferably, the hydrolysis acidification tank and the biological contact oxidation tank are both provided with flocculent combined fillers, the bottoms of the hydrolysis acidification tank and the biological contact oxidation tank are both provided with perforated aeration pipes, and are provided with air blowers communicated with the perforated aeration pipes.
Preferably, the demulsifier is a polyether demulsifier.
(III) advantageous effects
Compared with the prior art, the invention provides a process method for treating oily wastewater of metal cutting fluid, which has the following beneficial effects: the physical oil skimming treatment is carried out in the oil separation tank, most of floating oil is removed, the demulsifier is added into the adjusting tank, the dirty oil contained in the sewage destroys the emulsification effect under the action of the demulsifier, the subsequent processes of coagulation, air-water contact, solid-liquid separation and the like through the air floatation system are carried out, pollutants such as emulsified oil in the water body, suspended solid with the specific gravity smaller than 1 and the like react with the medicament to generate alum blossom substances, the alum blossom substances float to the water surface of the air floatation tank under the carrying of dissolved air water and are removed by the slag scraper, the dirty oil contained in the sewage is basically subjected to physicochemical cleaning, the sewage is further purified by combining the traditional biochemical treatment, and the treatment effect is better.
Drawings
FIG. 1 is a process flow diagram of the present invention;
Detailed Description
Example 1
Referring to fig. 1, a process for treating oily wastewater of metal cutting fluid includes the following steps:
s1, discharging the sewage into an oil separation tank for treatment, removing a large amount of floating oil on the surface by an oil skimming device, feeding part of the sewage with the dirty oil skimmed into an adjusting tank for homogenizing and equalizing the amount, and adding a demulsifier into the adjusting tank; the oil separation tank achieves the purpose of separation by utilizing the difference of specific gravity of suspended matters and water in the wastewater, the oil separation tank adopts a horizontal flow type structure, oil-containing wastewater enters the oil separation tank with a rectangular plane through a water distribution tank, slowly flows along the horizontal direction, oil products float on the water surface in the flow, and are pushed into an oil collection pipe by an oil collection pipe or an oil scraper arranged on the surface of the tank to flow into a dehydration tank; heavy oil and other impurities which are precipitated in the oil separation tank are accumulated in a bottom sludge hopper and enter a sludge pipe through a sludge discharge pipe, wastewater subjected to oil separation treatment overflows into a drainage channel discharge tank to be subjected to subsequent treatment so as to remove emulsified oil and other pollutants, sewage subjected to primary treatment is concentrated by the adjusting tank, the flow stabilization is homogenized, a demulsifier is added into the adjusting tank through the adding, the emulsification effect of oil-containing substances in the sewage is broken, and the subsequent treatment is facilitated.
S2, pressurizing the sewage treated in S1 by a lift pump, sending the sewage into a dissolved air floatation tank, reacting pollutants such as emulsified oil, suspended solids with specific gravity smaller than 1 and the like in a water body with a medicament to generate alum blossom substances through processes such as coagulation, air-water contact, solid-liquid separation and the like of an air floatation system, floating up to the water surface of the air floatation tank under the carrying of the dissolved air water, and removing the alum blossom substances by a residue scraper; the air flotation machine is characterized in that a dissolved air system generates a large amount of micro bubbles in water, so that air is attached to suspended particles in a highly dispersed micro bubble form to cause the state that the density is less than that of the water, the air floats on the water surface by utilizing the buoyancy principle, so that solid-liquid separation is realized, and floating slag floating on the upper layer is scraped under the action of a slag scraper.
The sewage treated by the S3 and S2 automatically flows into a hydrolysis acidification tank, and macromolecular organic matters are decomposed under the action of hydrolytic bacteria, so that the biodegradability is improved; the hydrolysis (acidification) treatment method is a method between aerobic and anaerobic treatment methods, and can reduce treatment cost and improve treatment efficiency by combining other processes; the hydrolysis acidification process controls anaerobic treatment in a first stage and a second stage of anaerobic treatment with short reaction time according to different growth speeds of methanogenic bacteria and hydrolysis acid-producing bacteria, namely, the process of hydrolyzing insoluble organic matters into soluble organic matters under the action of a large amount of hydrolysis bacteria and acidification bacteria and converting macromolecular substances which are difficult to biodegrade into small molecular substances which are easy to biodegrade, thereby improving the biodegradability of the wastewater and laying a good foundation for subsequent treatment; hydrolysis refers to biochemical reaction carried out extracellularly before organic matters enter microbial cells; the microorganism completes the biocatalytic reaction by releasing free extracellular enzymes or immobilized enzymes attached to the outer wall of the cell. Acidification is a typical fermentation process, and metabolites of microorganisms are mainly various organic acids; in terms of mechanism, hydrolysis and acidification are two stages of an anaerobic digestion process, but different processes have different treatment purposes of hydrolysis and acidification; the hydrolysis purpose in the hydrolytic acidification-aerobic biological treatment process is mainly to convert non-soluble organic matters in the original wastewater into soluble organic matters, particularly industrial wastewater, mainly convert organic matters which are difficult to biodegrade into organic matters which are easy to biodegrade, and improve the biodegradability of the wastewater so as to be beneficial to subsequent aerobic treatment; in consideration of the energy consumption problem of subsequent aerobic treatment, the hydrolysis is mainly used for pretreatment of low-concentration degradation-resistant wastewater.
S4, the sewage treated in S3 flows into a biological contact oxidation pond, organic matters in raw water are biochemically degraded through the metabolism of aerobic bacteria on the organic matters, and the aerobic microorganisms are attached to the filler, so that the propagation and the survival of the bacteria are facilitated; the biological contact oxidation method is one of biomembrane methods, and has the advantages of both activated sludge and biomembrane; compared with the traditional activated sludge method and biological filter method, the method has the process advantages of large specific surface area, high sludge concentration, long sludge age, high oxygen utilization rate, power consumption saving, low sludge yield, low operating cost, easy operation of equipment, easy maintenance and the like, and is widely researched and applied at home and abroad; the purification efficiency is high; the time required by treatment is short; the adaptability to the change of the organic load of the inlet water is strong; the sludge backflow is not needed, and the sludge bulking problem is avoided; the operation management is convenient.
S5, feeding the sewage after biochemical treatment into a secondary sedimentation tank, realizing sludge-water separation under the action of gravity, and discharging the supernatant after reaching the standard; the secondary sedimentation tank is an important component of an activated sludge system and mainly has the functions of separating sludge, clarifying a mixed solution, concentrating and refluxing the activated sludge; the working effect can directly influence the effluent quality and the return sludge concentration of the activated sludge system.
S6, discharging scum generated by the dissolved air flotation tank, activated sludge generated by the hydrolysis acidification tank and the biological contact oxidation tank and residual sludge generated by the secondary sedimentation tank into a sludge concentration tank, wherein supernatant in the sludge concentration tank reflows to the regulating tank, sludge is sent to a spiral sludge dehydrator by a sludge pump for dehydration, mud cakes are treated by periodic outward transportation, and filtrate reflows to the regulating tank;
the physical oil skimming treatment is carried out in the oil separation tank, most of floating oil is removed, the demulsifier is added into the adjusting tank, the dirty oil contained in the sewage destroys the emulsification effect under the action of the demulsifier, the subsequent processes of coagulation, air-water contact, solid-liquid separation and the like through the air floatation system are carried out, pollutants such as emulsified oil in the water body, suspended solid with the specific gravity smaller than 1 and the like react with the medicament to generate alum blossom substances, the alum blossom substances float to the water surface of the air floatation tank under the carrying of dissolved air water and are removed by the slag scraper, the dirty oil contained in the sewage is basically subjected to physicochemical cleaning, the sewage is further purified by combining the traditional biochemical treatment, and the treatment effect is better.
A process method for treating oily wastewater of metal cutting fluid comprises the steps that an oil skimming device is arranged in an oil separation tank, and the oil skimming device performs oil skimming operation every 24 hours; the oily sewage is little in production amount and is discharged uninterruptedly, and the oily sewage is collected by an oil separation tank after 24 hours and just reaches the oil skimming water level to perform skimming treatment on the floating oil.
A process for treating oily waste water of metal cutting fluid comprises arranging an electric heating tube on the inner wall of an oil separation tank, wherein the temperature of water in the oil separation tank is 20-30 ℃; the sewage in the oil separation tank is heated by the electric heating pipe, so that the water level in the oil separation tank is between 20 and 30 ℃, a better temperature condition is provided for subsequent physical and chemical treatment, and simultaneously, the activity of microorganisms in biochemical treatment is high at the water temperature of 20 to 30 ℃, the capability of decomposing organic matters is strong, and the treatment effect is good.
A treatment process method of oily wastewater of metal cutting fluid comprises arranging a demulsifier dosing device in an adjusting tank; and a demulsifier adding device is used for adding a demulsifier into the regulating reservoir in advance, breaking the emulsification effect of the dirty oil and providing a foundation for subsequent flocculation treatment.
A process method for treating oily wastewater of metal cutting fluid comprises arranging a dissolved air flotation machine, a PAC dosing pump, a PAM dosing pump, an alkali liquor dosing pump and a dosing cylinder corresponding to the PAC dosing pump, the PAM dosing pump and the alkali liquor dosing pump at a dissolved air flotation tank, arranging a coagulation stirring device in the dosing cylinder, and arranging a slag scraper at the upper part in the dissolved air flotation tank; to adding PAC in the medicine bucket, PAM flocculating agent and alkali lye, stir each medicament misce bene through thoughtlessly congeal agitating unit, add the medicine pump through PAC, PAM adds medicine pump and alkali lye adds the medicine pump and adds above-mentioned medicament to dissolving in the air flotation tank in, make and dissolve and produce the flocculating constituent in the air flotation tank, through dissolving air flotation machine to dissolving the air flotation tank in drum into micro-fine bubble, make the air adhere to on the flocculating constituent with the micro-bubble form of high dispersion, cause the state that density is less than water, utilize buoyancy principle to make it float on the surface of water, thereby realize solid-liquid separation, the solid that the sediment machine will suspend is scraped to the rethread is clear away, thereby get rid of the harmful substance in the sewage.
A process for treating oily waste water containing metal cutting fluid includes setting flocculent combined filler in hydrolytic acidification tank and biological contact oxidation tank, setting perforated aeration pipe at bottom of hydrolytic acidification tank and biological contact oxidation tank, setting blower connected with perforated aeration pipe; the flocculent combined filler can provide a better attachment bed for microorganisms, so that a good carrier of a microbial film can be blown into the hydrolysis acidification tank and the biological contact oxidation tank by the blower through the perforated aeration pipe, a sufficient aerobic environment is provided for the microorganisms, the activity of the microorganisms is enhanced, and the decomposition of organic matters in sewage is facilitated.
A metal cutting fluid oil-containing wastewater treatment process method, the demulsifier is polyether demulsifier; the demulsifier is mainly nonionic polymer surfactant, various high-carbon alcohols, alkylphenol, alkylamine, phenolic resin and other substances containing active hydrogen are widely used as initiators to obtain the polymer demulsifier, and particularly, a block copolymer formed by using a certain number of PO chains (C0) as lipophilic groups and EO chains (CH0) as hydrophilic groups has obvious demulsification effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. A process method for treating oily wastewater of metal cutting fluid is characterized by comprising the following steps:
s1, discharging the sewage into an oil separation tank for treatment, removing a large amount of floating oil on the surface by an oil skimming device, feeding part of the sewage with the dirty oil skimmed into an adjusting tank for homogenizing and equalizing the amount, and adding a demulsifier into the adjusting tank;
s2, pressurizing the sewage treated in S1 by a lift pump, sending the sewage into a dissolved air floatation tank, reacting pollutants such as emulsified oil, suspended solids with specific gravity smaller than 1 and the like in a water body with a medicament to generate alum blossom substances through processes such as coagulation, air-water contact, solid-liquid separation and the like of an air floatation system, floating up to the water surface of the air floatation tank under the carrying of the dissolved air water, and removing the alum blossom substances by a residue scraper;
the sewage treated by the S3 and S2 automatically flows into a hydrolysis acidification tank, and macromolecular organic matters are decomposed under the action of hydrolytic bacteria, so that the biodegradability is improved;
s4, the sewage treated in S3 flows into a biological contact oxidation pond, organic matters in raw water are biochemically degraded through the metabolism of aerobic bacteria on the organic matters, and the aerobic microorganisms are attached to the filler, so that the propagation and the survival of the bacteria are facilitated;
s5, feeding the sewage after biochemical treatment into a secondary sedimentation tank, realizing sludge-water separation under the action of gravity, and discharging the supernatant after reaching the standard;
s6, discharging scum generated by the dissolved air flotation tank, activated sludge generated by the hydrolysis acidification tank and the biological contact oxidation tank and residual sludge generated by the secondary sedimentation tank into a sludge concentration tank, wherein supernatant in the sludge concentration tank reflows to the regulating tank, sludge is sent to a spiral sludge dewatering machine by a sludge pump for dewatering treatment, mud cakes are treated by periodic outward transportation, and filtrate reflows to the regulating tank.
2. The process method for treating the oily wastewater of the metal cutting fluid according to claim 1, wherein an oil skimming device is arranged in the oil separation tank, and the oil skimming device performs oil skimming operation every 24 hours.
3. The process method for treating the oily wastewater of the metal cutting fluid, as recited in claim 2, wherein the inner wall of the oil separation tank is provided with an electric heating pipe, and the temperature of the water in the oil separation tank is 20-30 ℃.
4. The process method for treating the oily wastewater of the metal cutting fluid according to claim 3, wherein a demulsifier dosing device is arranged in the regulating reservoir.
5. The process method for treating the oily wastewater of the metal cutting fluid according to claim 4, wherein a dissolved air flotation machine, a PAC dosing pump, a PAM dosing pump, an alkali liquor dosing pump, and a dosing cylinder which is arranged corresponding to the PAC dosing pump, the PAM dosing pump and the alkali liquor dosing pump are arranged at the dissolved air flotation tank, a coagulation stirring device is arranged in the dosing cylinder, and a slag scraper is arranged at the upper part in the dissolved air flotation tank.
6. The process method for treating the oily wastewater of the metal cutting fluid according to claim 5, wherein flocculent combined fillers are arranged in the hydrolysis acidification tank and the biological contact oxidation tank, perforated aeration pipes are arranged at the bottoms of the hydrolysis acidification tank and the biological contact oxidation tank, and an air blower communicated with the perforated aeration pipes is arranged.
7. The process method for treating the oily wastewater of the metal cutting fluid according to claim 6, wherein the demulsifier is a polyether demulsifier.
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| CN202010831660.XA CN111925064A (en) | 2020-08-18 | 2020-08-18 | Treatment process method of oily wastewater of metal cutting fluid |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607975A (en) * | 2020-12-25 | 2021-04-06 | 苏州市环境保护有限公司 | Comprehensive treatment method of cutting fluid wastewater |
| CN113501624A (en) * | 2021-07-28 | 2021-10-15 | 重庆鑫盾机电(集团)有限公司 | Treatment process of emulsion-containing wastewater |
| CN113788584A (en) * | 2021-09-24 | 2021-12-14 | 惠州市吉邦精密技术有限公司 | Machining wastewater treatment method and industrial wastewater purification method |
| 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 |
| CN115536213A (en) * | 2022-09-27 | 2022-12-30 | 广州思伊特环保科技有限公司 | Oily wastewater treatment method |
| CN115893714A (en) * | 2022-11-04 | 2023-04-04 | 甘肃金创绿丰环境技术有限公司 | High-concentration degradation-resistant wastewater treatment process |
| CN116177801A (en) * | 2023-02-17 | 2023-05-30 | 安徽北乾智能科技有限公司 | Oily wastewater treatment device and treatment method thereof |
-
2020
- 2020-08-18 CN CN202010831660.XA patent/CN111925064A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607975A (en) * | 2020-12-25 | 2021-04-06 | 苏州市环境保护有限公司 | Comprehensive treatment method of cutting fluid wastewater |
| CN113501624A (en) * | 2021-07-28 | 2021-10-15 | 重庆鑫盾机电(集团)有限公司 | Treatment process of emulsion-containing wastewater |
| 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 |
| CN113788584A (en) * | 2021-09-24 | 2021-12-14 | 惠州市吉邦精密技术有限公司 | Machining wastewater treatment method and industrial wastewater purification method |
| CN115536213A (en) * | 2022-09-27 | 2022-12-30 | 广州思伊特环保科技有限公司 | Oily wastewater treatment method |
| CN115893714A (en) * | 2022-11-04 | 2023-04-04 | 甘肃金创绿丰环境技术有限公司 | High-concentration degradation-resistant wastewater treatment process |
| CN116177801A (en) * | 2023-02-17 | 2023-05-30 | 安徽北乾智能科技有限公司 | Oily wastewater treatment device and treatment method thereof |
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