中文关键词温度猪场废水厌氧消化液自养脱氮厌氧氨氧化(ANAMMOX)微生物群落结构 英文关键词temperatureswine wastewaterautotrophic nitrogen removalanaerobic ammonia oxidizing (ANAMMOX)microbial community structure

作者	单位	E-mail
黄方玉	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041	Fangyuhuang611@163.com
邓良伟	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041
杨红男	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041
杨含	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041
肖友乾	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041
王兰	农业部沼气科学研究所, 成都 610041 农业部农村可再生能源开发利用重点实验室, 成都 610041	wanglan01@caas.cn

中文摘要 通过运行4个不同温度条件下（30、25、20和15℃）的自养型同步脱氮反应器，研究了不同温度下自养型同步脱氮工艺处理猪场废水厌氧消化液的性能差异及其微生物机制.结果表明，30℃条件下反应器脱氮性能最佳.当温度由30℃降为25℃时，反应器总氮去除率从73%降低到66%，总氮去除速率从2.29 kg·（m³·d）^-1降低到1.72 kg·（m³·d）^-1，污泥的形态和粒径变化不明显（SMD由80.85 μm降为79.95 μm）.当温度低于20℃时，总氮去除率降低到42%，总氮去除速率降低到1.18 kg·（m³·d）^-1，同时发现污泥出现解体现象，粒径减小（SMD为63.21 μm）.而当温度为15℃时，总氮去除率降低至37%，总氮去除速率低至1.00 kg·（m³·d）^-1，反应器运行困难.微生物群落结构分析表明，温度对厌氧氨氧化细菌的影响明显大于氨氧化细菌，因此低温条件下反应器脱氮性能下降的主要原因是厌氧氨氧化细菌对温度更敏感. 英文摘要 Four laboratory-scale autotrophic nitrogen removal bioreactors were implemented to investigate performance differences and microbial mechanisms under different temperatures (30, 25, 20, and 15℃). The results showed that the reactor performance under 30℃ was higher than others. When the temperature decreased from 30℃ to 25℃, total nitrogen removal efficiency reduced from 73% to 66%, and total nitrogen removal rate from 2.29 kg·(m³·d)^-1 to 1.72 kg·(m³·d)^-1. The morphology and particle size of the sludge did not change significantly (SMD:from 80.85 μm to 79.95 μm). When the temperature was 20℃, the total nitrogen removal efficiency reduced to 42%, the total nitrogen removal rate reduced to 1.18 kg·(m³·d)^-1, and the sludge disintegration phenomenon occurred with particle size reduction (SMD:63.21 μm). When the temperature was 15℃, the total nitrogen removal efficiency reduced to 37%, and the total nitrogen removal rate got as low as 1.00 kg·(m³·d)^-1. In addition to that, the reactor operation was difficult. The analysis of microbial community structure showed that the influence of temperature on anaerobic ammonia oxidizing bacteria is greater than that on ammonia oxidizing bacteria. This sensitivity to temperature of the anaerobic ammonia oxidizing bacteria was the main reason for the decreased performance under low temperature conditions.

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