食品廃棄物の発酵液を用いた脱窒化のための炭素源戦略の最適化:ブチラートとサクラロースの相乗効果メカニズム
Bojie Liao1, Qiongfang Wang1, Ting Zhang2
1Shanghai University of Engineering Science, Shanghai, 201600, China.
Journal of environmental management
|February 13, 2026
まとめ
ブチラートを好むことで食品廃棄物の発酵を最適化することで,生物学的窒素除去が促進されます. この戦略は,食品廃棄物を持続可能な炭素源として利用することで,排水処理における窒素除去効率と微生物の安定性を改善します.
科学分野:
- 環境微生物学 環境微生物学
- 排水処理工学 排水処理工学とは
- 持続可能な資源管理について
背景:
- 揮発性脂肪酸 (VFA) と炭水化物で豊富な食品廃棄物の発酵液は,生物学的窒素除去のための持続可能な電子ドナーです.
- 発酵液の組成の変動は,脱酸化を不安定化させることができ,VFA-サッカリド相互作用の微生物生態学的効果は十分に理解されていません.
研究 の 目的:
- 食品廃棄物の発酵による異なる揮発性脂肪酸 (VFA) と炭水化物の組み合わせが窒素除去効率に与える影響を調査する.
- これらの混合炭素源が,脱窒化過程における微生物コミュニティと代謝経路に及ぼすメカニズム的影響を明らかにする.
主な方法:
- 4つの炭素源システム (アセテート+サクラロース,プロピオネート+サクラロース,ブチレート+サクラロース,アセテートのみ) を,バッチ反応炉 (SBR) の配列化において体系的に評価した.
- PICRUSt2の機能予測を用いて,窒素とニートリートの除去効率,ニートリートの蓄積,微生物コミュニティの組成の分析.
主要な成果:
- ブチラート・サクロース系は,最も高い窒素除去効率 (98.5%) を達成し,アセテート・サクロース系とプロピオネート・サクロース系を上回った.
- ブチラート・サクロース系は,最も低い窒素蓄積率 (<0.5 mg/L) を維持し,フェルルギニバクターやテリモナスのような機能的属を選択的に濃縮した.
- PICRUSt2の分析は,ブチラート-サクラソース系における膜輸送とエネルギー代謝に関連する強化されたKEGG経路を示し,相乗効果を示唆した.
結論:
- 酸性発酵を調節してブチラート主体の化合物になるようにすることは,炭素源としての食品廃棄物の利用を最大化するための有望な戦略です.
- このアプローチは,下水処理における堅固な窒素除去と微生物の安定性を保証します.
- VFA-サッカリドの相互作用を理解することは,持続可能な排水処理プロセスを最適化するための洞察を提供します.
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