Study on Pretreatment Technology of Spent Metalworking Fluids

Zeqi Wu

《International Core Journal of Engineering》 7卷7期 (2021/07) Pp. 91-96

https://doi.org/10.6919/ICJE.202107_7(7).0012

摘要

For metal processing industry to produce metal cutting waste liquids can be poor biochemical problems, adopt the method of coagulation and advanced oxidation of spend metalworking liquids pretreatment, optimized the coagulant added condition, compare the treatment effect of different coagulants under the condition of advanced oxidation on flocculation of waste liquids after treatment, comparing the UV spectra of water under different processing time. The experimental results show that: The removal rate of COD reaches 75.4% after the coagulation treatment of the cutting waste liquids with 28900mg/L COD by polyaluminum chloride (PAC) and polyacrylamide (PAM). The combination of coagulation and advanced oxidation technology can greatly improve the biodegradability of the wastewater after coagulation, and the B/C changes from 0.261 to 0.569, which provides a better treatment condition for the subsequent biodegradation.

關鍵字

Cutting Waste Liquids ； Advanced Oxidation ； Coagulation

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