Systematic analysis of biochemical performance and the microbial community of an activated sludge process using ozone-treated sludge for sludge reduction

被引:72
作者
Yan, Sang-Tian [1 ]
Zheng, Hao [1 ]
Li, An [1 ]
Zhang, Xue [1 ]
Xing, Xin-Hui [1 ]
Chu, Li-Bing [1 ]
Ding, Guoji [2 ]
Sun, Xu-Lin [3 ]
Jurcik, Benjamin [3 ]
机构
[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
[2] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200072, Peoples R China
[3] Air Liquide Labs, Tsukuba, Ibaraki 3004247, Japan
关键词
Sludge reduction; Ozonation; Lysis-cryptic growth; Microbial activity; Microbial population; WASTE-WATER TREATMENT; EXCESS SLUDGE; LISTERIA-MONOCYTOGENES; SUPEROXIDE-DISMUTASE; OZONATION; COMBINATION; CATALASE; NITROGEN; PROTOZOA; REMOVAL;
D O I
10.1016/j.biortech.2009.05.029
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Two lab-scale bioreactors (reactors 1 and 2) were employed to examine the changes in biological performance and the microbial community of an activated sludge process fed with ozonated sludge for sludge reduction. During the 122 d operation, the microbial activities and community in the two reactors were evaluated. The results indicated that, when compared with the conventional reactor (reactor I), the reactor that was fed with the ozonated sludge (reactor 2) showed good removal of COD, TN and cell debris, without formation of any excess sludge. In addition, the protease activity and intracellular ATP concentration of reactor 2 were increased when compared to reactor 1, indicating that reactor 2 had a better ability to digest proteins and cell debris. DGGE analysis revealed that the bacterial communities in the two reactors were different, and that the dissimilarity of the bacterial Population was nearly 40%. Reactor 2 also contained more protozoa and metazoa, which could graze on the ozone-treated sludge debris directly. (C) 2009 Elsevier Ltd. All rights reserved
引用
收藏
页码:5002 / 5009
页数:8
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