In order to investigate the treatment performance and microorganism mechanism of IVCW for domestic wastewater in central of China, two parallel pilot-scale IVCW systems were built to evaluate purification efficiencies, microbial community structure and enzyme activities. The results showed that mean removal efficiencies were 81.03 % for COD, 51.66 % for total nitrogen (TN), 42.50 % for NH4 (+)-N, and 68.01 % for TP. Significant positive correlations between nitrate reductase activities and TN and NH4 (+)-N removal efficiencies, along with a significant correlation between substrate enzyme activity and operation time, were observed. Redundancy analysis demonstrated gram-negative bacteria were mainly responsible for urease and phosphatase activities, and also played a major role in dehydrogenase and nitrate reductase activities. Meanwhile, anaerobic bacteria, gram-negative bacteria, and saturated FA groups, gram-positive bacteria exhibited good correlations with the removal of COD (p = 0.388), N (p = 0.236), and TP (p = 0.074), respectively. The IVCW system can be used to treat domestic wastewater effectively.
英文摘要:
In order to investigate the treatment performance and microorganism mechanism of IVCW for domestic wastewater in central of China, two parallel pilot-scale IVCW systems were built to evaluate purification efficiencies, microbial community structure and enzyme activities. The results showed that mean removal efficiencies were 81.03 % for COD, 51.66 % for total nitrogen (TN), 42.50 % for NH4 (+)-N, and 68.01 % for TP. Significant positive correlations between nitrate reductase activities and TN and NH4 (+)-N removal efficiencies, along with a significant correlation between substrate enzyme activity and operation time, were observed. Redundancy analysis demonstrated gram-negative bacteria were mainly responsible for urease and phosphatase activities, and also played a major role in dehydrogenase and nitrate reductase activities. Meanwhile, anaerobic bacteria, gram-negative bacteria, and saturated FA groups, gram-positive bacteria exhibited good correlations with the removal of COD (p = 0.388), N (p = 0.236), and TP (p = 0.074), respectively. The IVCW system can be used to treat domestic wastewater effectively.
1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China 3.Yunnan Univ, Res Inst Engn & Technol, Kunming 650091, Peoples R China 4.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation:
Wu, SQ; Chang, JJ; Dai, Y; Wu, ZB; Liang, W.Treatment performance and microorganism community structure of integrated vertical-flow constructed wetland plots for domestic wastewater,ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2013,20(6):3789-3798
