| 垃圾填埋场渗滤液短程生物脱氮的长期稳定性实验研究 |
| 摘要点击 2335 全文点击 1616 投稿时间：2013-03-28 修订日期：2013-07-04 |
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| 中文关键词 垃圾渗滤液 单级UASB-SBR 生物脱氮 低温 |
| 英文关键词 landfill leachate first-stage UASB-SBR biological nitrogen removal low temperature |
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| 中文摘要 |
| 以实际高氨氮垃圾渗滤液为研究对象，考察了单级UASB-SBR生化系统除有机物和脱氮特性，重点研究了常、低温条件下，该生化系统生物脱氮的长期稳定性. 623 d的实验结果表明，基于UASB反应器内高效的反硝化和厌氧产甲烷联合去除机制，以及SBR反应器内几乎100%的硝化和反硝化，在进水COD浓度为1000~13800 mg·L-1条件下，最终出水COD浓度为150~1234 mg·L-1，在进水NH4+-N浓度为574~2360 mg·L-1条件下，最终出水NH4+-N小于10 mg·L-1，平均去除率分别在90%和98%以上，尤其是获得了99.2%的TN去除率，出水TN小于30 mg·L-1，实现垃圾渗滤液内有机物和氮的高效、深度去除. 整个实验期间，SBR反应器实现并维持了稳定的生物硝化和反硝化，成功跨越2个冬季，15℃ 以下共计171 d，最低温度为10.2℃. |
| 英文摘要 |
| The long-term stability of nitrogen removal from municipal landfill with high ammonia nitrogen (NH4+-N) content was investigated by using a biological system consisting of a first-stage up-flow anaerobic sludge bed (UASB) and sequencing batch reactor (SBR) under normal and low temperature conditions. The 623 days experimental results clearly showed: the efficient denitrification and methanogenesis were conducted in a same UASB reactor, and almost 100% of denitrification was obtained, when feed COD concentration ranged from 1000 mg·L-1 to 13800 mg·L-1, effluent COD concentration was between 150 mg·L-1 and 1234 mg·L-1, and when the influent ammonia nitrogen (NH4+-N) changed from 574 mg·L-1 to 2360 mg·L-1, the effluent NH4+-N was below 10 mg·L-1,the removal efficiency reached 90% and 98%, respectively. Especially, above 99.2% removal efficiency of TN was obtained, and effluent TN concentration was below 30 mg·L-1, advanced and efficient nitrogen and organic removal were achieved in the biological system. Furthermore, stable nitrification and denitrification were achieved during the entire experiment period, especially, were maintained successfully for 171days at the temperature below 15℃ and the lowest temperature of 10.2℃ during two winters. |
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