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論文投稿 Anaerobic Co-digestion of Grass and Sewage Sludge: Laboratory Experiments and Feasibility Analysis

作成年度 2016 年度
論文名 Anaerobic Co-digestion of Grass and Sewage Sludge: Laboratory Experiments and Feasibility Analysis
論文名(和訳)
論文副題
発表会
誌名 Water Environment Research
巻・号・回 88 11
発表年月日 2016/11/01
所属研究室/機関名 著者名(英名)
Public Works Research InstituteTaira Hidaka
Public Works Research InstituteFeng Wang
Public Works Research InstituteKensuke Sakurai
Public Works Research InstituteJun Tsumori
Public Works Research InstituteMizuhiko Minamiyama
抄録
Grass is drawing attention for its high potential for biogas production. Anaerobic digesters in wastewater treatment plants can be used for producing biogas by processing grass without having to invest in the construction of new treatment facilities. Batch and continuous digestion experiments were conducted to assess the feasibility of co-digestion of sewage sludge and grass. The focus was on a thermophilic condition, starting-up from exiting mesophilic anaerobic digestion of sewage sludge only. The batch and continuous experiments used two different sewage sludges. Results demonstrated a methane generation of approximately 0.2 normal liter-methane/g volatile solids-grass. The addition of grass did not affect the ammonia concentration and improved the dewaterability of the digested sludge. The start-up performance from mesophilic digested sewage sludge to thermophilic co-digestion with grass was confirmed. A feasibility analysis demonstrated that co-digestion is applicable in terms of energy recovery and greenhouse gas emission, depending on transport distance of grass.
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