| 水力停留时间对活性污泥系统的硝化性能及其生物结构的影响 |
| 摘要点击 2483 全文点击 1831 投稿时间：2005-09-24 修订日期：2005-11-26 |
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| 中文关键词 水力停留时间 硝化菌 硝化 微生物呼吸醌 活性污泥法 |
| 英文关键词 hydraulic retention time(HRT) nitrifiers nitrification microbial quinine conventional activated sludge system |
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| 中文摘要 |
| 利用微生物呼吸醌指纹谱图结合传统分析方法研究了水力停留时间(HRT从30 h逐步缩短至5 h)对活性污泥硝化性能及种群结构的影响.结果表明,对于NH4+-N浓度为500 mg·L-1的废水,在HRT≥20 h时,氨氮去除率可达98%以上.若继续缩短HRT,污泥流失严重,尽管进水NH4+-N浓度降低,出水NH4+-N和NO2 |
| 英文摘要 |
| A conventional activated sludge system was used to treat the ammoniumbearing inorganic wastewater for 260 days under decreased HRTs.When treating 500 mg·L-1NH4+-N wastewater,over 98% ammonia removal could be obtained at HRT≥20 h.Sharp washout of biomass occurred when HRT was further decreased,resulting in the accumulation of ammonium and nitrite.Changes in the community structure were monitored by microbial quinone and conventional analytical methods.Quinone profiles indicated that ammonia-oxidizing bacteria(AOB) in β-Proteobacteria and Nitrobacteria in α-Proteobacteria were the predominant species to oxidize ammonia and nitrite,respectively.The number of AOB decreased with the reduction of biomass in bioreactor,while that of nitrite-oxidizing bacteria(NOB) changed little and fluctuated at 105 CFU·L-1. |
