原文传递
The long-term effect of nitrite on the granule-based enhanced biological phosphorus removal system and the reversibility
| 题名： | The long-term effect of nitrite on the granule-based enhanced biological phosphorus removal system and the reversibility |
| 正文语种： | 中文 |
| 作者： | Xiongliu Zheng Peide Sun Juqing Lou Zhiguo Fang Maoxin Guo Yingqi Song Xiudi Tang Tao Jiang |
| 作者单位： | School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, hina School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, hina;Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, hina |
| 关键词： | Granule-based enhanced biological phosphorus removal system Nitrite Extracellular polymeric substances Microbial community structure Reversibility |
| 摘要： | This study investigated the long-term effect of nitrite on the granule-based enhanced biological phosphorus removal (EBPR) system and the reversibility from macro- to micro-scale.Nitrite was found to seriously deteriorate the EBPR performance and result in severe sludge bulking.The inhibited polysaccharides excretion could lead to breaking the stability and integrity of the granules.Therefore,the reduced particle size and granule disintegration were observed.In this study,granules with lower ratio of proteins to polysaccharides (1.76) had better structure and function than the higher (3.84).Experimental results demonstrated that the microbial community structure was largely changed due to the presence of nitrite.In comparison,glycogen accumulating organisms (GAOs) had stronger resistibility and higher recovery rate than poly-phosphate accumulating organisms (PAOs).Interestingly,the community composition was unable to recover (Dice coefficients,33.0%),although good EBPR performance was achieved only by propagating other types of PAOs. |
| 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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