低曝气速率对间歇曝气老化垃圾生物反应器处理渗滤液中同时硝化反硝化的影响。
Effect of low aeration rate on simultaneous nitrification and denitrification in an intermittent aeration aged refuse bioreactor treating leachate.
机构信息
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China.
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China.
出版信息
Waste Manag. 2017 May;63:410-416. doi: 10.1016/j.wasman.2016.12.042. Epub 2017 Jan 11.
Three intermittent aeration aged refuse bioreactors (ARBs), A, B, and C, with aeration rates of 670, 1340, and 2010L/m aged refuse·d in stage 1, and 670, 503, and 335L/m aged refuse·d in stage 2 were constructed to evaluate the effect of low aeration rate on leachate treatment by simultaneous nitrification and denitrification (SND). Results show that SND can be achieved and improved by reasonably adjusting the aeration rate of the ARB. In stage 1, the average chemical oxygen demand (COD) removal rates of ARBs A, B, and C were 91%, 92%, and 93%, respectively. The ammonia nitrogen (NH-N) removal rate of the three ARBs approached 100%. The total nitrogen (TN) average removal rates were 68%, 59%, and 57%. The average SND efficiency values were 73%, 66%, and 65%. In stage 2, the COD removal rates of ARBs A, B, and C decreased from the original values of 85%, 92%, and 93% to 84%, 81%, and 80%. The NH-N removal rate decreased from above 99% to 90%-92% in ARB B and from above 99% to 87%-91% in ARB C. The TN removal rates of ARBs B and C increased to 59% and 53% on day 15 from the initial values of 49% and 43% and were maintained at 49%-61% and 50%-60%. The SND efficiency of ARBs B and C improved, and the average values were 68% and 70% after day 15. These values were higher than the 66% of ARB A during the same period. Comprehensively considering the COD, NH-N, TN removal rate, and SND efficiency, the optimal aeration rate of 670L/m aged refuse·d is therefore suggested in this study.
三个间歇曝气老化垃圾生物反应器（ARB），A、B 和 C，在阶段 1 的曝气率分别为 670、1340 和 2010L/m 老化垃圾和阶段 2 的 670、503 和 335L/m 老化垃圾，用于评估低曝气率对同时硝化反硝化（SND）处理渗滤液的影响。结果表明，通过合理调整 ARB 的曝气率，可以实现并提高 SND。在阶段 1 中，ARB A、B 和 C 的平均化学需氧量（COD）去除率分别为 91%、92%和 93%。三个 ARB 的氨氮（NH-N）去除率接近 100%。总氮（TN）的平均去除率分别为 68%、59%和 57%。平均 SND 效率值分别为 73%、66%和 65%。在阶段 2 中，ARB A、B 和 C 的 COD 去除率从初始值 85%、92%和 93%降至 84%、81%和 80%。NH-N 的去除率从 ARB B 中的 99%以上降至 90%-92%，从 ARB C 中的 99%以上降至 87%-91%。ARB B 和 C 的 TN 去除率在第 15 天从初始值 49%和 43%增加到 59%和 53%，并保持在 49%-61%和 50%-60%。ARB B 和 C 的 SND 效率提高，第 15 天后平均值分别为 68%和 70%，高于同期 ARB A 的 66%。综合考虑 COD、NH-N、TN 去除率和 SND 效率，本研究建议采用 670L/m 老化垃圾·d 的最佳曝气率。
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