Aerobic granulation in a modified oxidation ditch with an adjustable volume intraclarifier

被引：21

作者：

Li, Jun ^{[1
]}

Cai, Ang ^{[1
]}

Wang, Miao ^{[1
]}

Ding, Libin ^{[1
]}

Ni, Yongjiong ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310014, Zhejiang, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 157卷

基金：

中国国家自然科学基金;

关键词：

Aerobic granule; Continuous flow; Modified oxidation ditch; SBR; Microbial community; SEQUENCING BATCH REACTOR; SLUDGE GRANULATION; GRANULES; BIOREACTOR; MEMBRANE; CALCIUM; SALTS;

D O I：

10.1016/j.biortech.2014.01.130

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A modified oxidation ditch (MOD) with an adjustable volume intraclarifier was proposed and used to achieve aerobic sludge granulation in continuous flow process. This MOD with working volume of 60 L treated onsite wastewater from a town. Excellent aerobic granules with mean diameter of 600 mu m and sludge volume index (SVI) of 44 mL/g were obtained in 120 day. Bacterial community analysis revealed that most species from seed sludge were preserved in both MOD and granule SBR (G-SBR) except bacteria (Bacteroidetes) might be easily washed out during granulation. Some different bacterial communities were found in sludges from sequencing batch and continuous flow reactors. Presence of metal ions and inorganics in raw wastewater had positive effect on granule formation, but an adjustable volume intraclarifier for controlling selection pressure and deleting return sludge pump played a key role in aerobic sludge granulation. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：351 / 354

页数：4

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