Application of anaerobic digestion technology in rural domestic sewage treatment

Abstract

With the improvement in rural human settlement environment renovation in China, increasing attention has been paid to the treatment of rural domestic sewage. There is an urgent need to select suitable treatment technologies according to the characteristics of rural areas and the local water environmental capacity. Anaerobic digestion technology has been widely used in rural sewage treatment because of its simple operation and low cost. The research and application status of anaerobic digestion technology such as septic tanks, rural household biogas, domestic sewage-purifying methane tanks, anaerobic filters, and combined treatment technology in rural domestic sewage treatment were analyzed in this study. The anaerobic digestion technology and mode were compared and summarized according to the construction target, process, residence time, influent concentration, effluent quality, construction investment, and operation cost. Finally, suggestions regarding the application of anaerobic digestion technology in rural domestic sewage treatment were proposed, which would provide a reference for scientific and reasonable application of anaerobic digestion technology in rural domestic sewage treatment.