摘要
预负载絮体层具有吸附和截留的作用,在超滤膜表面预负载絮体后能强化去除水中的锑(Ⅴ)。研究结果表明,不同预负载絮体含固率条件下,混凝/絮体预负载超滤(CFPLU)工艺的出水锑(Ⅴ)浓度均低于5μg/L,且当絮体含固率为0.15%时,锑(Ⅴ)去除率高达97.29%;预负载絮体层能作为超滤膜表面的屏障,减少超滤膜接触污染物的机会,进而缓解膜污染,这也为饮用水厂剩余污泥的处置提供了新思路,可实现污泥的资源化利用。
The preloaded floc layer has the function of adsorption and interception.The removal of antimony(V)can be enhanced by preloading flocs on the surface of ultrafiltration membrane.The concentration of antimony(V)in effluent of coagulation/flocs preloaded ultrafiltration(CFPLU)process was less than 5μg/L under different solid contents of flocs.Moreover,the removal rate of antimony(V)was as high as 97.29%when the solid content of flocs was 0.15%.The preloaded floc layer could be used as a barrier on the surface of ultrafiltration membrane to reduce the exposure of ultrafiltration membrane to pollutants and alleviate membrane fouling.This method provides a new idea for the disposal of excess sludge in waterworks,and it also realizes the utilization of resources.
作者
姚萌
冉治霖
卢文静
贺维鹏
YAO Meng;RAN Zhi-lin;LU Wen-jing;HE Wei-peng(School of Transportation and Environment,Shenzhen Institute of Information Technology,Shenzhen 518172,China;China Machinery International Engineering Design&Research Institute Co.Ltd.,Changsha 410007,China;College of Civil Engineeringy Hunan University,Changsha 410082,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第13期26-30,共5页
China Water & Wastewater
基金
深圳市科创委国际合作交流项目(JCYJ20160226092135176、GJHZ20180416164721073)
广东省创新强校工程项目(2017GkQNCX067、2017GKTSCX065)。
关键词
超滤膜
絮体预负载
锑(Ⅴ)
膜污染
污泥回收
ultrafiltration membrane
preloaded flocs
antimony(V)
membrane fouling
sludge recycling
