基于膜-生物协同体系的煤化工高盐废水资源化处理研究OACHSSCD

The treatment stability of high-salinity wastewater from the coal chemical industry remains persistently low due to the dual constraints of membrane fouling and microbial inhibition.A four-stage integrated process was constructed by coupling partial nitrification,an anaerobic membrane bioreactor,nanofiltration,and high-pressure reverse osmosis.This system was further enhanced by salt-resistant membrane surface modification,directional acclimation of halophilic sludge,and multi-input multi-output intelligent feedback control,significantly improving its resistance to shock loads.After continuous operation,both the influent chemical oxygen demand and total dissolved solids were effectively reduced.The coupled freezing-evaporation unit simultaneously separated Na2SO4·10H2O and NaCl,increasing the water reuse rate and achieving zero liquid discharge on site.Preliminary economic evaluation indicates that both energy consumption and carbon emissions per ton of treated water are lower than the industry average,with a shortened investment payback period.The process has been validated at the pilot scale in an industrial park and shows strong potential for large-scale application.