原文传递
The effect of COD loading on the granule-based enhanced biological phosphorus removal system and the recoverability
| 题名： | The effect of COD loading on the granule-based enhanced biological phosphorus removal system and the recoverability |
| 正文语种： | 中文 |
| 作者： | Shenjing Yu Peide Sun Wei Zheng Lujun Chen Xiongliu Zheng Jingyi Han Tao Yan |
| 作者单位： | School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, hina Zhejiang Provincial Key Laboratory of Water Science and Technology, Yangtze elta Region Institute of Tsinghua University, Zhejiang, Jiaxing 314016, hina School of Environment, Tsinghua University, Beijing 100084, hina |
| 关键词： | Granule-based EBPR system COD loading Extracellular polymeric substances Metabolism process of PAOs Recoverability |
| 摘要： | In this study,the effect of varied COD loading (200,400,500,600 and 800 mg L1) 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 L1 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-b-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. |
| 会议日期： | 20141113 |
| 会议举办地点： | 杭州 |
| 会议名称： | 浙江省环境科学学会2014年学术年会 |
| 出版日期： | 2014-11-13 |
| 母体文献： | 浙江省环境科学学会2014年学术年会论文集 |
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