N2O emission from a combined ex-situ nitrification and in-situ denitrification bioreactor landfill
N2O emission from a combined ex-situ nitrification and in-situ denitrification bioreactor landfill
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异位硝化和原位反硝化生物反应器垃圾填埋场的 N2O 排放
DOI：
10.1016/j.wasman.2014.06.023
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发表时间：
2014
期刊：
影响因子：
8.1
通讯作者：
Jing-jing Li
中科院分区：
文献类型：
--
作者：
Ya-nan Wang;Ying-jie Sun;Lei Wang;Xiao-jie Sun;Hao Wu;Rong-xing Bian;Jing-jing Li
采用老化垃圾生物反应器（简称A反应器）的脱氮与新鲜垃圾生物反应器（简称F反应器）的原位反硝化组合工艺，研究了城市生活垃圾（MSW）稳定化过程中N2 O的排放规律。结果表明，F反应器中N2 O浓度从检测不到到约130 ppm，而A反应器中N2 O浓度高得多，从检测不到到约900 ppm。渗滤液交叉回灌后各时段N2 O排放的连续监测结果差异较大，主要是由于垃圾的稳定化程度不同所致。N2 O浓度的变化与渗滤液水质密切相关，主要受F反应器渗滤液COD和COD/TN比值以及A反应器渗滤液DO、ORP和NO3−-N的影响。
A combined process comprised of ex-situ nitrification in an aged refuse bioreactor (designated as A bioreactor) and in-situ denitrification in a fresh refuse bioreactor (designated as F bioreactor) was constructed for investigating N2O emission during the stabilization of municipal solid waste (MSW). The results showed that N2O concentration in the F bioreactor varied from undetectable to about 130 ppm, while it was much higher in the A bioreactor with the concentration varying from undetectable to about 900 ppm. The greatly differences of continuous monitoring of N2O emission after leachate cross recirculation in each period were primarily attributed to the stabilization degree of MSW. Moreover, the variation of N2O concentration was closely related to the leachate quality in both bioreactors and it was mainly affected by the COD and COD/TN ratio of leachate from the F bioreactor, as well as the DO, ORP, and NO3−-N of leachate from the A bioreactor.