南京工业大学学报（自然科学版）2024，Vol.46Issue(1)：12-19,8.DOI:10.3969/j.issn.1671-7627.2024.01.002
A/O-MBR在冷轧含油废水处理中的应用
Application of A/O-MBR in cold-rolling oil waste water treatment
摘要
Abstract
In the steel rolling production process,a considerable amount of wastewater is generated.Direct discharge of them would not only pollute the environment,but also cause a substantial waste of water resources.This study employed an anaerobic/aerobic-membrane bioreactor(A/O-MBR)pilot equipment and custom-made braid reinforced polyvinylidene difluoride(PVDF)membrane modules for steel rolling wastewater treatment at a steel company in Nanjing.The objective is compliant discharge of steel rolling wastewater.The experiment showed that the waste water treatment achieved a turbidity removal rate above 99％,a chemical oxygen demand(COD)removal rate over 90％,and a mineral oil removal rate above 80％.The treated water's turbidity,COD and oil contents were reduced to below 0.2 NTU,50 mg/L,and 4.5 mg/L,respectively.When operated stably below subcritical flux for about 250 hours,the transmembrane pressure difference(TMP)of the membrane modules increased rapidly and reacheded the limit of 30 kPa,indicating the upper threshold of membrane capacity.The analysis of membrane fouling resistance showed that the main fouling type was filter cake layer fouling,which could be removed by simple water washing.In addition,a significant proportion of membrane pore blockage fouling,greatly contributing to irreversible fouling and the rapid TMP increase in the later stage of the pilot test,was identified.The mineral oil content in steel rolling wastewater aggravated membrane fouling and optimal results were obtained after periodic backwashing with low-concentration of sodium hypochlorite.关键词
PVDF内衬膜/膜生物反应器/轧钢废水/膜污染/膜清洗Key words
braid reinforced PVDF membrane/membrane bioreactor/steel rolling wastewater/membrane fouling/membrane cleaning分类
资源环境引用本文复制引用
高恒,时锦银,周玥,周杰,刘飞,汪朝晖,崔朝亮..A/O-MBR在冷轧含油废水处理中的应用[J].南京工业大学学报（自然科学版）,2024,46(1):12-19,8.基金项目
江苏省自然科学基金青年基金(BK20160984) （BK20160984）
