Characteristics and effect factors of CH4 emissions in single-family treatment wetlands

• Published in: Ecological engineering 2022-12, Vol.185, p.106793, Article 106793
• Main Authors: Hu, Jiashuai, Li, Xinping, Liu, Xiaoling, Liang, Jie, Yang, Xin, Li, Mei, Luo, Hongbing, Zhang, Ke, Jiang, Bing, Li, Xiaoting, Fu, Shuzhi, An, Xiaochan, Chen, Wei, Cheng, Lin, Zhang, Xiaohong
• Format: Article
• Language: English
• Subjects: CH4; Emission characteristics; Global warming potential (GWP); Rural domestic sewage; Single-family treatment wetland (SFTW)
• ISSN: 0925-8574; 1872-6992
• DOI: 10.1016/j.ecoleng.2022.106793

Single-family treatment wetland (SFTW) is increasingly used in developing countries to treat rural domestic sewage. But they can emit CH4, which will affect the global carbon balance. However, a detailed understanding of CH4 emissions in SFTW under long-term real operating conditions is still lacking. To understand the emission characteristics of CH4 from SFTW, a 50-month CH4 flux measurement was conducted in six SFTWs (namely ZHANG, HU, LUO, WEEC, WANG, GAO) of Anlong village, Chengdu, China. The results show that the monthly fluxes of CH4 ranged from −81.35 to 223.13 mg·m−2·h−1, with an average value of 37.41 ± 60.97 mg·m−2·h−1. Generally, CH4 emissions were higher in spring and summer than other seasons (p