Biopolymer fouling in dead-end ultrafiltration of treated domestic wastewater

Water Research
Xing ZhengMartin Jekel

Abstract

Ultrafiltration (UF) is considered as a suitable treatment process after conventional wastewater treatment to produce reuse water. Nevertheless, fouling affects the performance of UF to a large extent. As biopolymers (mostly macro polysaccharide-like and protein-like molecules) have been identified as major foulants affecting the filterability of water in dead-end UF, the present study focuses on investigating the reversibility of biopolymer fouling occurring at different biopolymer mass loads to the membrane and under different compression conditions. UF-membrane stirred cell tests using five cycles show that filtering treated domestic wastewater leads to a significant permeability reduction due to the accumulation of biopolymers on the membrane surface and/or in the membrane pores. Although they can be removed by hydraulic backwashing, an increased mass load of biopolymers reduces the removal efficiency. This correlation was verified using a UF pilot plant filtering treated wastewater (secondary effluent or slow sand filtrate). The effect of biopolymer fouling layer deformation on its reversibility was studied using multi-cycle membrane filtration tests under different filtration pressures. The results showed that higher filt...Continue Reading

References

May 7, 2003·Environmental Science & Technology·Miaomiao ZhangYujung Chang
Mar 3, 2006·Environmental Science & Technology·Chalor Jarusutthirak, Gary Amy
Sep 28, 2007·Water Science and Technology : a Journal of the International Association on Water Pollution Research·R MehrezM Jekel

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Citations

Sep 2, 2017·Membranes·Appana LokRobert C Andrews
Jun 22, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Lihua SunTao Chen
Jun 27, 2017·NPJ Biofilms and Microbiomes·Tomohiro InabaHiroshi Habe
Jan 16, 2021·The Science of the Total Environment·Raquel García-PachecoPierre Le-Clech

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