ワインアース発酵における酸塩ショックがメタノゲネシスと硫酸還元ダイナミクスを形作る
André do Vale Borges1, Lucas Tadeu Fuess1, Henrique Dornelles2
1Biological Processes Laboratory (LPB), São Carlos School of Engineering (EESC), University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina, São Carlos, São Paulo, 13563-120, Brazil.
The Science of the total environment
|February 17, 2026
まとめ
甘のビナスの二相無酸素消化 (2nd-AD) の戦略的なpHショックは,初期メタノゲネシスを効果的に抑制します. これにより,下流バイオガス生産が強化され,硫化水素の減少を促進することにより,硫化水素のリスクを管理します.
科学分野:
- バイオテクノロジーとバイオエンジニアリング
- 環境科学 環境科学
- 微生物生態学 微生物生態学とは
背景:
- 効率的な二相無酸素消化 (2nd-AD) の甘のビナッサは,メタノゲネシスを抑制することを要求する酸性生成中のメタノゲネシス メタンの生産量を最大化し,H2Sリスクを最小限に抑える.
- 微生物経路の制御は,バイオガス生産とビナスの廃棄物の再利用の最適化に不可欠です.
研究 の 目的:
- 塩酸と塩基の pH ショックを連続的に投与することで,甘のメタノゲネシスを制御する効果を調査する. vinasse 2nd-AD.
- 硫酸塩の減少,アセテート生産,微生物コミュニティのダイナミクスに対するpHショックの影響を評価する.
- ビナスのバイオ精製工場の強化のための新しい運用戦略を確立する.
主な方法:
- 30°Cで90日間,甘のビナッセで給餌された無酸素構造床型原子炉 (AnSTBR) を利用しました.
- 6つの作業段階で連続した酸性およびアルカリ性pHショックを実施しました.
- 分子技術を用いて微生物群を分析し,メタンの含有量,硫酸塩の減少,アセテート濃度などの重要なパラメータをモニタリングした.
主要な成果:
- pHショックは,メタノゲネシス (メタンの含有量が3%まで減少) を効果的に抑制し,硫化ゲノシス (硫酸塩の除去は82%まで) を促進しました.
- このプロセスは,アセテートに富んだ排水液 (>3.0 g-HAc L−1) を生成し,バッファリング容量が増加し,その後のメタノゲネシスに適した.
- デスルフォビブリオは主力となる硫酸塩還元剤として特定され,バクテロイドスとアミノバクテリウムが主要なアセテート生産者であった.
結論:
- 連続的なpHショックは,砂糖のビナスの微生物経路を調節するための堅実な戦略を提供します.
- このアプローチは,バイオガスの可能性を高め,H2Sを制御することによって環境の安全性を向上させ,持続可能な廃棄物管理をサポートします.
- この発見は,標的化された微生物の制御を通じて,ビナスのバイオ精製所の運用効率を向上させるものです.
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