Characteristics and stability of aerobic granules treating domestic sewage
A granular sludge sequencing batch reactor (GSBR) was applied to treat domestic sewage, so as to investigate the characteristics and stability of granular sludge associated with real wastewater. During stable running period, high sludge concentration and low SVI were maintained in reactor, accompanying with good pollutant removal performances. Moreover, sludge size distribution examination showed that granular sludge was the dominant form in the reactor during this operation phase, especially under high organic loading, granules with the diameter over 1.25mm accounted for around half of the total MLSS. In comparison, flocculent sludge grew faster during the low load running period, weakening the stability of system. In addition, characteristics comparison of granules at different size categories showed that settling velocity, wet density and microbial activity of sludge increased with the increase of granule size, but SVI and moisture content decreased, in accordance with the feature of aerobic granules, such as high activity, high settling property and low moisture content.
aerobic granular sludge domestic sewage stability OLR size distribution
Min Ji Yanjie Wei Shan Lu Fen Wang Leiluo Cheng
School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China Tianjin municipal engineering design & research institute,Tianjin 300051,China
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）