| 移动床生物膜系统SND影响因素研究 |
| 摘要点击 1857 全文点击 1112 投稿时间：2008-09-11 修订日期：2008-11-17 |
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| 中文关键词 移动床生物膜系统 同步硝化反硝化 C/N pH 碱度 |
| 英文关键词 simultaneous nitrification and denitrification(SND) moving-bed biofilm reactor(MBBR) C/N pH alkalinity |
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| 中文摘要 |
| 采用移动床生物膜反应器实现了稳定同步硝化反硝化脱氮.实验研究了C/N对同步硝化反硝化脱氮的影响，结果表明，随着C/N的增加，同步硝化反硝化脱氮效率提高，在好氧条件下总氮去除率最高达到92.9%，但当C/N =12时，TN去除率提高并不明显；实验研究了pH对氨氮和TN去除效果的影响，结果表明，氨氮去除pH适宜区域为8.03～9.01，TN去除pH适宜区域为8.03～8.55；实验分析了实际生活污水中碱度和pH值对脱氮效果的影响，并对比研究了理论碱度和实际碱的关系，结果表明碱度和pH在同步硝化反硝化脱氮中对氮素去除的影响不大，不需要额外调节系统pH，也不需要在反硝化过程中补充碱度.单个周期内同步硝化反硝化过程中pH值和碱度变化规律的研究表明，pH可以指示SND中氮素转化过程. |
| 英文摘要 |
| The phenomenon of simultaneous nitrification and denitrification(SND) has taken place in moving-bed biofilm reactor(MBBR) steadily. The effect of C/N to denitrification effectiveness has been also studied in the experiment. The results of the treatment show that better denitrification efficiency could be obtained by increasing C/N ratio and the removal ratios of TN reached 92.9%.When C/N ratio is 12, the amplitude of TN removal ratio is not obvious. The effects of pH to ammonia nitrogen and TN removal ratio have been researched. The results show that the proper range of pH is 8.03-9.01 to removing ammonia nitrogen and the proper range of pH is 8.03-8.55 to TN efficiency. The experiment analyzed the influence of alkalinity and pH to denitrification efficiency, moreover, the relation of theoretical alkalinity and practical alkalinity has been studied. The results indicate that the influence of pH and alkalinity to removal efficiency of ammonia nitrogen and TN is low in SND, so does not need to adjust pH and increase alkalinity. The changes of pH and alkalinity during the reaction course were also investigated, and the result shows that pH can indicate the conversion process of nitrogen during a single representative period in SND. |
