| 前置反硝化生物脱氮工艺实现亚硝酸氮积累的试验研究 |
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| 中文关键词 前置反硝化 生物脱氮 亚硝酸氮积累 溶解氧浓度 |
| 英文关键词 pre-denitrification biological nitrogen removal nitrite accumulation DO |
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| 中文摘要 |
| 通过试验实现了前置反硝化工艺亚硝酸氮的积累，从温度、pH值、游离氨（FA）浓度、污泥龄、溶解氧（DO）浓度等几个影响亚硝酸氮积累的主要因素逐一分析。采用中试装置在常温条件下处理实际生活污水。在试验开始阶段DO浓度维持在0.5mg/L，出现了亚硝酸氮的积累，随后提高DO浓度到1.5mg/ L以上，亚硝酸氮积累现象随之消失，最后又降低系统中的DO浓度到0.5mg/ L附近，亚硝酸氮积累现象再次出现，由此得出DO是实现亚硝酸氮积累的关键因素。试验发现有效地控制DO浓度在0.5mg/ L可实现亚硝酸氮比较持久稳定的积累。 |
| 英文摘要 |
| It was realized nitrite accumulation in a pilot-scale pre-denitrification process at normal temperature. The influence factors， temperature， pH， FA and DO， for nitrite accumulation were analyzed one by one. The nitrite was accumulated in the beginning time with the DO kept at 0.5mg/L， however the phenomenon of nitrite accumulation was vanished when the DO increased to 1.5mg/L. At last the nitrite accumulation was resumed when DO reduced to 0.5mg/L. So it could be obtained that DO was the main factor to realize nitrite accumulation in the study. It was found that it was possible to keep stable and high nitrite accumulation effectively control DO at 0.5mg/l. |
