成果報告書詳細
管理番号20090000000299
タイトル*平成20年度中間年報 新エネルギー技術フィールドテスト事業 地域バイオマス熱利用フィールドテスト事業 食品工場における多種バイオマスの最適な複合利用による熱供給事業
公開日2009/9/3
報告書年度2008 - 2008
委託先名株式会社エネルギーアドバンス 森永乳業株式会社
プロジェクト番号P07018
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) 本共同研究の概要 本共同研究のシステム概念図を下記に示す。本共同研究は、生産プロセスから発生する性状の異なる複数のバイオマス燃料をメタン発酵とバイオマスボイラによってエネルギー転換し、蒸気として生産プロセスで有効利用するものである。本共同研究の目的は、この複合システムの効率最適化と長期連続安定運転の条件を見出すことである。高含水率の乳製品等については、メタン発酵によりバイオガスを発生させ、そのバイオガスはバイオマスボイラの燃料として有効利用する。低含水率のコーヒーかすについては、燃料化するために乾燥し、バイオマスボイラにて燃焼させることにより蒸気エネルギーを取り出す。さらには、メタン発酵で発生した発酵ケーキについてもバイオマスボイラの燃料として有効活用するためにコーヒーかすとともに乾燥工程に投入し、乾燥した上で燃料として利用する。乾燥に利用する蒸気は、バイオマスボイラからの発生蒸気でまかない、余剰蒸気は工場内の生産プロセスにて利用する。すなわち本事業は複数のバイオマスを、その特長により最適な方法でエネルギー化を行い、その保有エネルギーの最大限の有効利用達成が可能なシステムであることを確認するとともに、運転管理方法についても実証確立することを目的としている。
英文要約There are a lot ofnumerous beverage plants throughout Japan tothat discharge both dairy products with higher water content and coffee grounds with lower water content. In such plants, various biomasses with different water contents are produced. Previously, we individually examined depending on water content, systems that were adapted for each biomass, depending on its water content. However have been examined individually, but a complex system using numerous biomass feedstocks ofwith different properties hadhas not yet been examined. Therefore, the purpose of this joint research is to convert multiplevarious biomasses with different properties, which are produced during production processat different properties, into steam energy by combining two systems (methane fermentation and biomass boiler,) according to water content), and to verify the capability of athe system thatwhich uses steam effectively in production process. FThe feedstocks with higher water content are converted into methane gas at the a methane fermentation facility, and those withthe feedstocks of low water content are dried, to turned them into fuel, and recovered as steam energy throughby burning it in a biomass boiler. The steam used for dryingto dry is covered by the sSteam generated from the biomass boiler is used for drying, and the surplus steam is used duringfor production process in the plant. Thusat is, the objective of the research isaims are to convert numerous biomasses into energy in an optimal way according to theeach characteristic of each biomass, and to confirm that the system is capable of achieving utmost and effective utilization of stored energy, as well as to verify and establish anthe operation management system. In 2008, the methane fermentation system and the biomass boiler systems were constructed. In thisThe methane fermentation facility adopted, a membrane-type methane fermentation method using membrane type was adopted in order to obtain high efficiency and to save space saving. Maximum capacity of material input is 10 t/d. The biogas produced throughobtained by methane fermentation is used as gas fuel for the after-mentioned biomass boiler. D and digestion water is to be de-watered, and digested sludge is transported to a dryer described below and dried before good use as fuel for the boiler. Coffee grounds and digested sludge, which are which are the feedstocks withof lower water content, are converted into energy in the biomass boiler. Feedstocks are sent to the biomass boiler after dryinghaving dried. An iIndirect heating steam dryer was adopted for theas drying facility. A wWater tube boiler was adopted for the biomass boiler. The steam produced byobtained from the biomass boiler is tied into the existing steam header and well-utilized as energy foron the plant’s production line by tying into the existing steam header. ForAs fuels of this biomass boiler fuel, not only coffee grounds and digested sludge but also the biogas that has been collected in the forementioned methane fermentation system is effectivelyalso used effectively. Operational pParameters of operation were adjusted duringin a test run. ThenAfter that, these systems were operated continuously. In the methane fermentation system, high ratio of COD consumption (more thanover 70 %) was gained at rated load. Though While the operation operated load changed in the range ofvaried within 40 to 100 % in duringthe continuous operation (about 3 months), and volume of produced biogas was changed as well, ratio of COD consumption was stable. VFA concentration in the methane fermentation solution was very low (underbelow 500 ppm). Based on theThese results, it was concluded that stable fermentation was achieved during theoccurred in this operation. Performance of the biomass boiler system was measured in at rated load.
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