高浓喷漆废水处理工艺协同组合应用研究

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中图分类号：TQ630.9 文献标志码：A文章编号：1001-5922（2026）03-0799-04

Analysis of advanced treatment process for high-concentration spray paint wastewater

HU Huadong，ZHOU Shuo

（Nantong Branch，Shanghai Zhenhua Heavy Industries（Group）Co.，Ltd.，Nantong 226OOO，Jiangsu China）

Abstract：The spray paint wastewater from a heavy equipment manufacturing enterprise is confronted with problems of complex composition，high polution load（with a chemical oxygen demand（COD） concentration of approximately （204 86，600mg/L ） and significant fluctuations in water quality and quantity.A combined treatment process was designed in this study：first，pretreatment is performed through coagulation and presure fitration，where demulsifiers and other agents are used to achieve solid-liquid separation；subsequently，the filtrate undergoes advanced purification via low-temperature evaporation under negative pressure at 35 -40 C ； finally，ceramic membrane filtration（retaining particles larger than 5O nanometers）and activated carbon adsorption are adopted to remove residual COD and odors.This process boasts reliable operation and low energy consumption.The COD and ammonia nitrogen contents in the treated effluentare lower than 13 mg/Land1.34 mg/Lrespectively，which meets the requirements of the national standards GB 8978—1996 and GB/T 19923—2005.

Key words：spray paint wastewater;coagulation and pressure filtration;Low-temperature evaporator;chemical oxygen demand

化学需氧量（COD）工业化进程加速了经济发展，但也加剧了环境污染问题，尤其在重工业领域。（剩余4593字）