| 基于氮平衡原理对南方污水处理厂中试脱氮工艺调控策略研究 |
| 摘要点击 1219 全文点击 799 投稿时间：2013-07-14 修订日期：2013-11-04 |
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| 中文关键词 脱氮 污泥回流比 混合液回流比 温度 污泥浓度 溶解氧 |
| 英文关键词 nitrogen removal sludge return ratio mixed liquid return ratio temperature MLSS DO |
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| 中文摘要 |
| 通过建立A2/O工艺中氮的物料平衡方程，预测不同进水TN条件下，如何调控污泥回流比和混合液回流比使出水氮达到国家一级A标准；然后根据预测的运行参数，调试武汉市龙王嘴污水处理厂中试模拟装置，进行工况验证. 结果表明，在进水TN低于30 mg·L-1，温度高于15℃ 时，不需要混合液回流即可实现良好的脱氮效果；在进水TN高于30 mg·L-1，温度在10~15℃ 之间时，增加混合液回流和DO可以提高脱氮效果，但当温度远远低于10℃ 时，必须同时提高混合液回流比来保证系统出水.该方法能较好依据水质状况通过调控回流比实现较好的脱氮效果. |
| 英文摘要 |
| By building the mass balance of nitrogen in A2/O process, the nitrogen model which raised some strategies on how to control sludge return ratio and mixed liquid return ratio to make the effluent nitrogen achieve the national standard A under different influent total nitrogen (TN), was set up. And the presumed parameters were verified by the pilot test of the Wuhan's Longwangzui WWTP. The result showed that when the temperature and the TN were over 15℃ and below 30 mg·L-1 respectively, the mixed liquid return ratio was 0. When the temperature was between 10℃ and 15℃ and TN was over 30 mg·L-1, higher MLSS and DO elevated N removal. When the temperature was far below 10℃, the mixed liquid return ratio was also at a higher level. Based on the Wuhan's Longwangzui WWTP influent water quality, measures of adjusting the return ratio were well adapted to obtain acceptable nitrogen effluent. |
