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Composite microbial preparation for assisted treatment of waste cutting fluid, and use method thereof

A technology of compound microorganisms and waste cutting fluid, which is applied in the field of wastewater purification rich in surfactants, can solve the problems of affecting the treatment efficiency and treatment effect of subsequent processes, high treatment costs, and increasing the burden on enterprises, so as to improve oxygen utilization and reduce risk. Small, reduce the effect of toxic effects

Active Publication Date: 2017-11-24
泰伦特生物工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the cutting fluid contains a large amount of mineral oil and various surfactants, conventional physical, chemical and biochemical methods are difficult to treat and discharge up to the standard. Enterprises usually entrust high-concentration waste cutting fluid as hazardous waste to a third party for disposal. The processing cost is high and increases the burden on the enterprise. , while low-concentration waste cutting fluid is often treated through primary treatment of demulsification, flocculation, and precipitation, and then undergoes secondary treatment with domestic sewage through biochemical methods (activated sludge method or anaerobic and aerobic process methods, etc.) to achieve discharge. Standard, but due to the high proportion of waste cutting fluid in the pre-treated sewage, it will affect the treatment efficiency and treatment effect of the subsequent process

Method used

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  • Composite microbial preparation for assisted treatment of waste cutting fluid, and use method thereof
  • Composite microbial preparation for assisted treatment of waste cutting fluid, and use method thereof
  • Composite microbial preparation for assisted treatment of waste cutting fluid, and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A wheel factory uses cutting fluid in the process of metal processing, and regularly discharges cutting waste fluid. After demulsification, flocculation, air flotation and degreasing, the waste fluid is mixed with domestic sewage and enters the biochemical treatment system. The COD of the mixed water is about 1000mg / L After 24 hours of hypoxia and 24 hours of aerobic aeration treatment, the COD of the effluent is 450-500mg / L, and the degradation rate is only about 50%. Often, the COD of the effluent is greater than 500mg / L due to the slightly higher proportion of the waste cutting fluid components in the influent. Exceeding emission standards.

[0033] Use complex microbial preparations to assist the biochemical system to treat wastewater, and the ratio is as follows: Bacillus licheniformis solid powder 59%, Pseudomonas fluorescens solid powder 40%, catalase 0.5%, lipase 0.5%

[0034] The compound microbial preparation is put into the aerobic pool according to the meter...

Embodiment 2

[0039] Another metal processing factory regularly discharges a certain amount of waste cutting fluid, and no domestic sewage is mixed in. After demulsification and flocculation to remove oil, the COD is still around 4000mg / L. The local environmental protection company designed an AO treatment process for the effluent after oil removal. After the completion of the project, the dewatered sludge from the nearby sewage treatment plant was taken for commissioning. After 6 months of commissioning, the effluent was still above 2000mg / L. The reason for the analysis was that the concentration of refractory macromolecular organic matter in the wastewater was high, which had a certain inhibitory effect on the microorganisms in the sludge. The growth condition of activated sludge is poor.

[0040] A complex microbial preparation is used to assist the biochemical system to treat wastewater. The ratio is as follows: Bacillus licheniformis solid powder 40%, Pseudomonas fluorescens solid powde...

Embodiment 3

[0046] There is also a cutting fluid manufacturer that produces a small amount of waste fluid every day, which is currently treated as hazardous waste outsourced. After the waste liquid is demulsified, flocculated and precipitated, the COD of the supernatant reaches 7000-10000mg / L.

[0047] Under laboratory conditions, a 1L plastic measuring cylinder was used to conduct sewage treatment experiments, and simulated domestic sewage with a COD of about 500mg / L was prepared to cultivate activated sludge (the original sludge was taken from the dewatered sludge of a sewage treatment plant). Put the sediment, remove the supernatant and add fresh simulated domestic sewage until the COD degradation rate reaches more than 80% and the SV reaches more than 20%, and then add the double-diluted demulsification and flocculation waste cutting fluid supernatant.

[0048] Add compound microbial preparation, the proportion is as follows: Bacillus licheniformis solid powder 50%, Pseudomonas fluore...

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Abstract

The invention relates to a composite microbial preparation for assisted treatment of waste cutting fluid. The composite microbial preparation comprises Bacillus licheniformis solid powder, Pseudomonas fluorescens solid powder, catalase and lipase, wherein the four components are mixed, the obtained mixture is added to an active sludge pool, a contact oxidation pool or an aerobic tank, and sewage treatment is performed. According to the present invention, the Bacillus licheniformis and the Pseudomonas fluorescens rapidly grow and breed by using the easily-degraded organic matters in the sewage, and can rapidly degrade the macromolecular organic matters in the wastewater when the Bacillus licheniformis and the Pseudomonas fluorescens grow to achieve a certain concentration, the catalase can rapidly eliminate the OH. free radicals in the system so as to reduce the toxic effects on bacteria and improve the oxygen utilization rate, and the lipase is used for decomposing the organic matters such as animal and vegetable oils in the wastewater, such that various components work in the matched and synergetic manner, the COD in the effluent is significantly reduced, the components are simple and easy to obtained, the cost is low, the additional equipment is not required during the use, the operation is simple, the risk is low, the treatment efficiency of the system can be significantly improved, the stability of the system can be enhanced, the COD in the effluent can be reduced, and the final standard discharge can be achieved.

Description

technical field [0001] The invention belongs to the technical field of purification of wastewater rich in surfactants, in particular to a compound microbial preparation for auxiliary treatment of waste cutting fluid and a method of use thereof. Background technique [0002] Cutting fluid is an industrial liquid used in metal cutting and grinding to cool and lubricate tools and workpieces. Cooling performance, lubricating performance, anti-rust performance, degreasing and cleaning function, anti-corrosion function, easy to dilute. It overcomes the shortcomings of traditional soap-based emulsions, which are easy to smell in summer, difficult to dilute in winter, and poor anti-rust effect, and has no adverse effect on lathe paint. It is suitable for cutting and grinding of ferrous metals. [0003] When the cutting fluid is in use, it needs to be mixed into the water, and then sprayed to the processing position of the lathe, and the water containing the cutting fluid flowing ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F3/12C02F101/30C02F101/32
CPCC02F3/12C02F3/30C02F3/34C02F3/342C02F2101/30C02F2101/32Y02W10/10
Inventor 赵艳辉鲍玮安同艳尹树花屈汉奇
Owner 泰伦特生物工程股份有限公司
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