Effect of PAC dosage on sludge properties and MBR performance in a hybrid MBR-PAC system
Improved insight into the effect of powdered activated carbon(PAC)on membrane fouling is crucial to the MBR performance.Sludge key characteristics,soluble microbial products(SMP)and transmembrane pressure(TMP)were monitored.The membrane fouling rate in the MBRs was analyzed based on TMP profiles and resistance-in-series model.PAC reduced the membrane filtration resistance and significantly decreased the fouling rate,and the sludge filterability was improved by extending the filtration time by almost two-fold.PAC affected the SMP concentration,and protein/polysaccharide(carbohydrate)was in a lower ratio.FTIR analysis indicated that PAC lowered the impact of organic carbon,proteins and polysaccharides absorption and deposition on the membrane surface and in the pores.The degree of reversible and irreversible fouling was related to the concentration of PAC added into the MBRs.At optimum dosage of 2 g/L,the results signified the PAC potential as a mitigation strategy of membrane fouling.
Activated sludge MBR PAC SMP Membrane fouling
Shi Zhang Xingtao Zuo Cong Ma Juan Xiong Bo Hu
College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China Department of Chemical and Biomolecular Engineering,University of Connecticut,06269-3222,United Stat College of Science,Huazhong Agricultural University,Wuhan 430070,China
国内会议
武汉
英文
137-168
2017-12-09（万方平台首次上网日期，不代表论文的发表时间）