Physical characteristics and formation mechanism of denitrifying granular sludge in high-load reactor

被引：44

作者：

Li, Wei ^{[1
]}

Zheng, Ping ^{[1
]}

Wang, Lan ^{[1
]}

Zhang, Meng ^{[1
]}

Lu, Huifeng ^{[1
]}

Xing, Yajuan ^{[1
]}

Zhang, Jiqiang ^{[1
]}

Wang, Ru ^{[1
]}

Song, Ji ^{[1
]}

Ghulam, Abbas ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Environm Engn, Hangzhou 310058, Zhejiang, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 142卷

基金：

高等学校博士学科点专项科研基金;

关键词：

Denitrification; High-load; Granular sludge; Physical characteristics; Formation mechanism; NITRATE; DENITRIFICATION; PERFORMANCE; EXTRACTION; WATER;

D O I：

10.1016/j.biortech.2013.04.118

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The physical characteristics of denitrifying granular sludge and their granulation mechanism were investigated in two denitrifying reactors (R1 and R2). The results showed that the denitrifying granular sludge was streamlined in shape with the aspect ratio (AR) of 0.62 +/- 0.05, large in size with the diameter of 2.39 +/- 0.05 mm, and fast in settlement with the average settling velocity (VS) of 126.36 +/- 13.32 m/h at the nitrate loading rate (NLR) of 35.14 +/- 0.38 kg/(m(3) d). The dominance of denitrifying granular sludge with good settleability was attributed to the enhanced growth of granular sludge by extracellular polymers (EPS) and the shaping of granular sludge by shear force. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：683 / 687

页数：5

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