Activated sludge ozonation to reduce sludge production in membrane bioreactor (MBR)

Journal of Hazardous Materials
Sheng-bing HeBao-zhen Wang

Abstract

Total experimental period was divided into two stages. At first stage, a series of batch studies were carried out to get an understanding of the effect of ozonation on sludge properties. At the following stages, three membrane bioreactors (MBRs) with different amounts of activated sludge to be ozonated were run in parallel for a long period to evaluate the influence of sludge ozonation on sludge yield and permeate quality. Through batch study, it was found that ozone could disrupt the cell walls and cause the release of plasm from the cells, then the amounts of soluble organics in the solution increased with ozonation time. With the rise of soluble organics, the amount of soluble organics to be mineralized increased as well, which would reduce the soluble organics content. For the counteraction between these two aspects, a pseudo-balance could be achieved, and soluble organics would vary in a limited range. Sludge ozonation also increased the contents of soluble nitrogen and phosphorus in the solution. On the basis of batch study, a suitable ozone dosage of 0.16 kg O(3)/kg MLSS was determined. Three systems were run in parallel for a total period of 120 days; it was demonstrated that a part of activated sludge ozonation could r...Continue Reading

Citations

Apr 10, 2013·Bioresource Technology·Mohd Zulkhairi Mohd YusoffChang-Ping Yu
Dec 18, 2012·Environmental Technology·Ozlem Demir, Ayse Filibeli
Feb 24, 2016·Environmental Science and Pollution Research International·Jian ZhangWei Zuo
Mar 17, 2009·Journal of Hazardous Materials·Toshinari MaedaHiroaki I Ogawa
Oct 7, 2008·Bioresource Technology·Guangming ZhangJie Zhang
Aug 2, 2015·Journal of Environmental Management·Xun-an NingJingyong Liu
Mar 8, 2013·Biotechnology Advances·Zhiwei WangZhichao Wu
Mar 5, 2017·The Science of the Total Environment·Qilin WangZhiguo Yuan
May 19, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Özlem Demir, Ayşe Filibeli
Sep 4, 2017·Environmental Science and Pollution Research International·Jian ZhangJun Zhang

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