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| 基于污水厂监测数据的反硝化脱氮影响因素分析 |
| Analysis on Influencing Factors of Denitrification based on Monitoring Data from Sewage Plant |
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| DOI： |
| 中文关键词: 反硝化脱氮 影响因素 污水处理厂 |
| 英文关键词: Denitrification Influencing factor Sewage plant |
| 基金项目:安徽省重点研究与开发计划基金资助项目（1804a0802191） |
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| 中文摘要: |
| 以污水厂长序列运行数据为基础，反推脱氮实际影响因素，开展反硝化脱氮试验。结果表明，在2019年4月前后TN出水平均浓度降低58%；受季节和污水厂升级改造影响，温度由15 ℃升高至25 ℃，混合液悬浮固体质量浓度（MLSS）由4 300 mg/L增至8 000 mg/L，活性污泥成分增加，脱氮效果提升；BOD5/TN和pH值等变化相对稳定，温度、MLSS是影响该污水处理厂反硝化脱氮的主要因素；当反应温度为（25±5）℃，pH值为75±02，MLSS为4 800 mg/L时，反硝化脱氮效果最佳，硝酸盐氮去除率达91%。 |
| 英文摘要: |
| Based on the long term operation data from a sewage plant，the actual influencing factors of denitrification were studied through denitrification experiments. The results showed that after treatment，the average concentration of total nitrogen in water decreased by 58% around April， 2019. Influenced by seasonal change and the upgrading and rebuilding of the sewage plant, the temperature increased from 15 ℃ to 25 ℃, mixed liquor suspended solids (MLSS) increased from 4 300 mg/L to 8 000 mg/L, the component of activated sludge and the effect of denitrification increased. The changes of BOD5/TN and pH value were relatively stable. Temperature and MLSS were the main factors affecting denitrification. When the reaction temperature was （25±5）℃, pH value was 7.5±0.2，and MLSS was 4 800 mg/L, the denitrification effect was the best, the removal rate of nitrate nitrogen reached 91%. |
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