Novel aerated constructed wetland using exhaust gas from biological wastewater treatment:performance and mechanisms
Artificial aeration is considered to be a promising approach to improve pollutants removal efficiency of constructed wetland(CW).This study designed a novel aerated CW using exhaust gas from biological wastewater treatment through coupling sequencing batch reactor(SBR)and vertical flow constructed wetlands(VFCWs).Compared with un-aerated CW,the introduction of exhaust gas into VFCW improved NH4+-N,TN and COD removal efficiency by 56.23%,37.14%and 20.62%,respectively.Aeration also enhanced the growth of plants in CWs,however,no significant difference was observed in plant growth between VFCW aerated with air and exhaust gas.Furthermore,the exhaust gas ingredients including odors(H2S,NH3),greenhouse gas(mainly N2O)and microbe aerosol were remarkably reduced after passing through CW.The removal efficiencies of H2S,NH3 and N2O were 36.68%,77.78%and 52.17%,respectively.Microbial analysis results revealed that CW with exhaust gas had the highest microbial community richness of ammonia-oxidizing bacteria(AOB)and nitrite-oxidizing bacteria(NOB),which optimized nitrogen transformation processes in CW.These results suggest that intermittent aerated CW with exhaust gas might have certain potential application for purifying the wastewater treatment plant effluent,however,further full-scale investigation is needed.
Aerated constructed wetland Exhaust gas Greenhouse gases Odor Microbial mechanism
Xinwen Zhang Jian Zhang Jikai Liu Zhen Hu Huijun Xie Yiwen Wu Chujun Zeng
Shandong Key Laboratory of Water Pollution Control and Resource Reues,School of Environmental Scienc Environmental Management Committee Office of Dongping Lake and Nansi Lake,Jining272000,China Environmental Research Institute,Shandong University,Jinan 250100,PR China
国内会议
浙江绍兴
英文
43-61
2017-04-15（万方平台首次上网日期，不代表论文的发表时间）