成果報告書詳細
管理番号20090000000170
タイトル*平成19年度中間年報 バイオマス等未活用エネルギー実証試験事業・同事業調査 バイオマス等未活用エネルギー実証試験事業 サイト内エネルギー自己完結型地域内有機廃棄物資源循環利活用事業
公開日2009/8/21
報告書年度2007 - 2007
委託先名コーンズ・エージー/農事組合法人支倉牧場生産組合/株式会社中央製作所
プロジェクト番号P02057
部署名新エネルギー技術開発部 バイオマスグループ
和文要約以下本編抜粋:1.共同研究の内容及び成果等 (1)牛糞尿とホタテウロとの共発酵 5月中旬より,ホタテウロの投入の開始した。滞留時間を考慮して,1日当りの原料投入量を2m3に設定した。試験開始時は,1日当り牛糞尿1m3,ホタテウロ0.5m3,水0.5m3を発酵槽に投入した。
英文要約Title: An experimental project on the practical utilization and complete recycling of organic wastes as resources, characteristic of the regional industries in the coastal area of the Sea of Okhotsk, northern Japan. (FY2007-FY2008) FY2008 Annual Report
From mid May 2007, we began to supply cattle manure and mid-gut glands of scallop (hereafter, "Uro") to the co-fermentation tank. Sum of the supplied material was 2 m3 a day; volume of the cattle manure was 1 m3, that of the scallop "Uro" 0.5 m3 and that of water 0.5 m3. Under the cattle manure/scallop "Uro" ratio of 2:1, mixture of these two raw materials did not ferment well despite the water addition would dilute the substances inhibiting fermentation. After the recovery from some trouble, we restart to supply these two raw materials for the co-fermentation in late August 2007, after the exchange of the contents in the co-fermentation tank with the digested slurry. The supplied volume of the cattle manure and the scallop "Uro" was 1.6 m3 and 0.4 m3 a day, respectively: the cattle manure/scallop "Uro" ratio was 4:1. In September 2007, biogas generated well through the co-fermentation, and the gas generation efficiency (gas volume per the raw material of 1 ton) was 42 m3/t for the co-fermentation of the cattle manure and scallop "Uro", and 27 m3/t for the fermentation only of the cattle manure (supplied at 15 m3/day). The digested slurry discharged from the co-fermentation contained Cadmium (Cd): Cd is highly concentrated in the scallop "Uro". Cd was eliminated from the digested slurry through electrolysis. The electric power required for the electrolysis was generated from the biogas by a co-generator. Biogas, which generated through the co-fermentation of the cattle manure and scallop "Uro" and fermentation of the cattle manure, sufficiently supplied the electric power for the Cd elimination. Furthermore, we found the surplus electric power to meet the further requirement for the electrolysis of a month. The digested slurry after the electrolysis met the criteria of the law for the fertilizer. After the spray of the digested slurry on the grassland, Cd concentration in the soil and grass was under detection. In late January 2008, we began to supply the cattle manure and the sludge produced from the milk processing (hereafter, milk sludge) to the co-fermentation tank. The raw material of 2 m3 a day consisted mostly of the cattle manure and contained the milk sludge of 65 kg. The biogas did not generate apparently for some time, however, the biogas generate well from the mid February 2008. For the last 1 week in February 2008, the gas generation efficiency was higher for the co-fermentation of the cattle manure and milk sludge (28.8 m3/t) than for the fermentation only of the cattle manure (25.2 m3/t).
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