A new system using self-agitated anaerobic digestion and contact aeration process for efficient methane recovery and wastewater treatment
(0) For more efficient food waste utilization,a new system,which was combined with a self-agitating anaerobic digestion reactor to reduce the operational energy and a conventional aerobic contact process to treat wastewater from methane fermentation,was developed.The performance of the system was examined by conducting a continuous experiment using food residue which was simulated food waste from commercial activity.Because the substrate has a low solid content,a gravity liquid-solid separation was conducted to condense the solid material in the substrate.In the anaerobic digestion reactor,stable methane fermentation of the condensed solid was achieved and a CODCr removal rate of 78% was obtained under the following conditions: CODcr loading rate of 3.0 kg/m3/day,temperature 55 ℃.Supernatant liquids in the separation tank and wastewater from the anaerobic digestion reactor were treated in a conventional contact aeration process.Average concentration of effluent BOD was 300 mg/L,which is below the Japanese sewage effluent BOD standard.Through the present examination,it was found that the new system can provide stable performance in methane production and improve effluent water quality.
Anaerobic digestion Aerobic contact process Food waste Self-agitation
Hiroshi Oshibe Noriko Osaka Naoko Yokoyama Akira Oshita Yoshiaki Ooba Yu-You Li
Energy System Research Institute, Tokyo Gas Co., Ltd., 1-7-7 Suehiro-cho Tsurumi-ku, Yokohama, JAPAN Nishihara Neo.Co., Ltd., 2-11-5 Shibaura Minato-ku, Tokyo, JAPAN Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku university
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
495-498
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）