原文传递
Inhibition of free ammonia to the granule-based enhanced biological phosphorus removal system and the recoverability
| 题名： | Inhibition of free ammonia to the granule-based enhanced biological phosphorus removal system and the recoverability |
| 正文语种： | 中文 |
| 作者： | Xiongliu Zheng Peide Sun Juqing Lou Jing Cai Yingqi Song Shenjing Yu Xuanyu Lu |
| 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;National Engineering Research enter of Urban Water Resources(Zhejiang Base), Hangzhou 310012, hina |
| 关键词： | Free ammonia Granule-based enhanced biological phosphorus removal system Microbial activity Microbial community structure Recoverability |
| 摘要： | The inhibition of free ammonia (FA) to the granule-based enhanced biological phosphorus removal (EBPR) system and the recoverability from macro- to micro-scale were investigated in this study.FAwas found to seriously deteriorate the EBPR performance and sludge characteristic (settleability and morphology).The FA inhibitory threshold of 17.76 mg N L1 was established.Acclimation phenomenon took place when poly-phosphate accumulating organisms (PAOs) were exposed for long time to constant FAconcentration (8.88 mg N L1).The repressed polysaccharides excretion could lead to breaking the stability and integrity of the granules.Therefore,the reduced particle size and granule disintegration were observed.The molecular analysis revealed that FA had a significant influence on the microbial communities and FA inhibition may provide a competitive advantage to glycogen accumulating organisms(GAOs) over PAOs.Interestingly,the community composition was found irreversible by recovery (Dice coefficients,36.3%),although good EBPR performance was re-achieved. |
| 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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