Effect of different anoxic/aerobic volume ratio on activated sludge settleability in A/O system
WANG Jie, XUE Tong-lai, PENG Yong-zhen, YANG Xiong, WANG Shu-ying, ZHANG Jian-wei
Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
In order to reveal the corelations of A/O ratio and sludge settleability, the effect of different volume ratio (2/6,4/4,6/2) on activated sludge settleability and community of filamentous fungus was investigated with domestic wastewater as influent during long-term operation. The resuls showed that good settleability of system was maintained when A/O ratio was 2/6, and the dominant filamentous bacteria was Type 0041.When A/O ratio was increased to 4/4 the system occurred bulking sludge with SVI up to 357mL/g, and the dominant filamentous bacteria were Type 0041,Type 1701. When A/O ratio of 6/2 was adopted, the system occurred slightly bulking sludge and realised stable shortcut nitrification and denitrification. So different A/O ratio had great influence on activated sludge settleability, at the same time the intracellular and extracellular storage characteristics of activated sludge and denitrification and phosphorus removal performance of the system were also severely affected.
王杰, 薛同来, 彭永臻, 杨雄, 王淑莹, 张健伟. A/O系统中不同缺氧/好氧体积比对活性污泥沉降性能的影响[J]. 中国环境科学, 2016, 36(2): 443-452.
WANG Jie, XUE Tong-lai, PENG Yong-zhen, YANG Xiong, WANG Shu-ying, ZHANG Jian-wei. Effect of different anoxic/aerobic volume ratio on activated sludge settleability in A/O system. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(2): 443-452.
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