成果報告書詳細
管理番号20120000000354
タイトル*平成23年度中間年報 バイオマスエネルギー技術研究開発 戦略的次世代バイオマスエネルギー利用技術開発事業(実用化技術開発) 乾式メタン発酵技術における主要機器の低コスト化並びに効率的なバイオガス精製技術及びガス利用システムの実用化に関する研究開発
公開日2012/7/11
報告書年度2011 - 2011
委託先名栗田工業株式会社
プロジェクト番号P10010
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:
1.共同研究の内容及び成果等
(1)研究開発の内容
1)乾式メタン発酵技術(栗田工業株式会社)
1. 乾式メタン発酵設備の建設費及び維持管理費の削減
乾式メタン発酵設備の建設費、維持管理費に占める割合が大きな投入装置のコスト削減を目指して、長時間運転(8 時間、16 時間)を実施し、バイオガス発生量、発酵残渣の性状データによりメタン発酵の生物学的安定性を確認し、長時間運転の効果を確認する。
2. バイオガスの前処理としての硫化水素の低減
昨年度実施したラボレベルでの硫化水素抑制剤注入の効果を実装置にて検証する。
既設施設に硫化水素抑制剤注入装置を設置し、実装置におけるバイオガス中の硫化水素低減と発酵残渣への影響を検証する。また、最適注入条件を取得すると共に、脱硫剤交換コストも含む脱硫に係るコストについて検討を行う。
3. バイオガスのメタン濃度の平準化
バイオマス原料の投入方法及び投入装置の運転管理方法によるバイオガスの挙動データを採取し、傾向を把握することで、バイオガスの平準化条件を取得する。
本研究に関しては、前述1.の長時間運転時にバイオガス発生量及びメタン濃度のデータを取得し、長時間運転によるメタン濃度平準化の効果を確認する。
英文要約Title : Biomass Energy Technical Study Development / Strategic Development Of Next Generation Technology For Biomass Energy Utilization (Development For Practical Technology) / Research And Development For Cost Reduction Of Main Machinery In The Dry Anaerobic Digestion Technology, And Effective Purification Of Biogas And Practical Use Of Gas Utilization (FY2010-FY2012 ) FY2011 Annual Report

Following are results of research and development in FY2011.
1) Reduction of construction cost and maintenance cost of dry anaerobic digestion facilities and Equalization of the concentration of methane in biogas:
An extension of operation time of digestion facilities makes it possible to apply a smaller feeding pump, and contributes the reduction of both construction cost and maintenance cost. It was confirmed that the methane concentration, the amount of biogas production and the properties of residue were not changed by extending the conventional (5 hrs) operation to 16 hrs operation. The fluctuation of methane concentration in biogas was within ±15%, and the target(±20%) was achieved.
2) Reduction of hydrogen sulfide from biogas as pretreatment:
It was confirmed by Hotaka plant operation that the concentration of hydrogen sulfide in biogas was reduced by the addition of suppressants to residue as much as 0.11 kg-H2S/kg- suppressant. Residue properties in digestion tank were stable during 3 months’ test period, and any hindrance to fermentation was not observed.
3) Development of effective biogas purification technology which include low concentration of methane:
The performance of a single membrane module was clarified, and the relationship between the permeation rate of biogas and the concentration of recovered methane was clarified. Based on this result, the optimization of the biogas purification unit was carried out by reconstruction. The concentration of purified methane is above 95%, and the methane recovery is 100% by using this reconstructed unit. So, our desired value was achieved (both the concentration of purified methane and methane recovery are above 90%).
4) Evaluation of adsorption-type methane storage device:
Customer needs were investigated by hearing biogas suppliers and biogas users, and the results were summarized. Adsorption-type methane storage device was installed and the storage performance of purified biogas was verified.
5) A supply examination of the refinement biogas:
The burning tests of purified biogas by small steam boiler were carried out. In these results, purified biogas can be used instead of town gas (13A).
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