A/OMBBR工艺处理垃圾焚烧渗沥液厌氧出水过程中N_2O释放的影响因素  

Factors on nitrous oxide emission during treatment of anaerobic effluent of fresh leachate from MSW incineration plant by A/O MBBR

作　　者：周梦[1] 刘钊[1] 孙德智[1] 

机构地区：[1]北京林业大学水体污染源控制技术北京市重点实验室污染水体源控与生态修复技术北京市高等学校工程研究中心,北京100083

出　　处：《环境工程学报》2017年第6期3425-3430,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51678051)

摘　　要：采用A/O MBBR工艺对垃圾焚烧渗沥液经厌氧生物处理后的出水进行脱氮处理,考察进水COD/N、pH、温度和回流比对脱氮系统中N_2O释放量的影响。结果表明,A/O MBBR系统中N_2O的释放量受进水COD/N、pH和回流比的影响较大,受温度的影响较小。降低进水COD/N、pH从8.5升高到9.5或降低到7.5、回流比从300%升高到400%,系统中N_2O的释放量均会升高。当进水COD/N为4.2,进水pH为8.5,温度为32℃,回流比为300%时,A/O MBBR系统中总N_2O的释放量最低,为2.03 mg·L^(-1),NH+4-N转化率和TN去除率分别为99.3%和80.6%。An anoxic/aerobic moving bed biofilm reactor （A/O MBBR） was used to treat the leachate from a municipal solid waste （MSW） incineration plant after being treated by an anaerobic biological process. The effects of COD/N, pH, temperature and reflux ratio on N2O emission were investigated in this study. The results showed that COD/N, pH and reflux ratio has been demonstrated to have a significant influence on N2O emission in A/O MBBR system, while the temperature had no apparent influence. N2O emission amount increased with decreasing the COD/N and with increasing the reflux ratio （from 300% to 400% ）, and the lower N2O emission amount was detected in the system with a pH of 8.5. The minimum N2O of 2.03 mg · L-1 was emitted under the optimal condition with the COD/N at 4. 2, pH at 8.5, temperature at 32 ℃ and reflux ratio at 300%. 99.3% of NH4 -N and 80.6% of TN can be removed by the A/O MBBR system under this optimal condition.

关 键 词：N2O释放量 COD/N pH 温度 回流比 

分 类 号：X703[环境科学与工程—环境工程]