期刊
BIORESOURCE TECHNOLOGY
卷 171, 期 -, 页码 80-87出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.08.057
关键词
Granule-based EBPR system; COD loading; Extracellular polymeric substances; Metabolism process of PAOs; Recoverability
资金
- National Natural Science Foundation of China [21276236]
- Major Scientific and Technological Special Emphasis on Social Development Project of Zhejiang Province, China [2010C03003, 2011C13014]
- Scientific Research Project of Education Department of Zhejiang Province [Y201017078]
- Natural Science Foundation of Zhejiang Province, China [Y12E080076]
- International Science and Technology cooperation Program of Zhejiang, Province, China [2013C24015]
- Scientific and Technological Innovation Projects of Zhejiang Province, China [2013R408057]
In this study, the effect of varied COD loading (200, 400, 500, 600 and 800 mg L-1) on stability and recoverability of granule-based enhanced biological phosphorus removal (EBPR) system was investigated during continuously 53-d operation. Results showed that COD loading higher than 500 mg L-1 could obviously deteriorate the granular EBPR system and result in sludge bulking with filamentous bacteria. High COD loading also changed the transformation patterns of poly-beta-hydroxyalkanoates (PHAs) and glycogen in metabolism process of polyphosphate-accumulating organisms (PAOs) and inhibited the EPS secretion, which completely destroyed the stability and integrality of granules. Results of FISH indicated that glycogen-accumulating organisms (GAOs) and other microorganisms had a competitive advantage over PAOs with higher COD loading. The community composition and EBPR performance were recovered irreversibly in long time operation when COD loading was higher than 500 mg L-1. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据