环境工程学报2024，Vol.18Issue(1)：101-109,9.DOI:10.12030/j.cjee.202308108
煤化工废水高效反渗透工艺运行效果及膜污染特征
Operating efficiency and membrane fouling characteristics of high efficiency reverse osmosis process in coal chemical wastewater treatment
摘要
Abstract
The concentration and reduction of concentrated brine by high efficiency reverse osmosis(HERO)process is the key for the zero liquid discharge wastewater system.Its operation effect significantly affects the efficiency of the following evaporation and crystallization,and directly determined the stability and cost of the system operation.In this study,the operation effect and membrane fouling characteristics of a HERO process for the zero liquid discharge coal chemical wastewater treatment system in North China was analyzed to disclose the key issue in HERO.Calcium and magnesium can be efficiently removed in the clarifying ponds and cation exchange system,while other ions and pollutants are mainly removed in RO.The dissolved organic matters are mainly microbial sourced humic substance and soluble microbial products,and humic substance is the main microbal source.The pretreatment stage has not targeted measure for SiO2 control,and the removal efficiency of silica(SiO2)is poor(29.43％)for coagulation,thus the concentration is high in the HERO process,resulting in severe silica combined fouling.The silica-organics,microorganisms and their metabolites are the main foulants in the 1st-stage RO,while silica scaling appear in the 2nd-stage RO due to the high concentration factor.Therefore,further strengthening SiO2 removal and its cleaning efficiency during chemical cleaning are key measures to alleviate membrane fouling and improve the operation stability.关键词
煤化工废水/高效反渗透/膜污染/有机物/二氧化硅Key words
coal chemical wastewater/high efficiency reverse osmosis/membrane fouling/dissolved organic matter/Silica分类
资源环境引用本文复制引用
王燕翔,郑利兵,钟慧,段宁鑫,胡大洲,魏源送,李清雪..煤化工废水高效反渗透工艺运行效果及膜污染特征[J].环境工程学报,2024,18(1):101-109,9.基金项目
国家重点研发计划(2021YFC3201403) （2021YFC3201403）
国家自然科学基金面上资助项目(52270081) （52270081）
