部分窒素化/アナモックス-ヒドロキシアパタイトプロセスにおける新しい安定状態のリン除去均衡の解明:基礎的なメカニズムと微生物の代謝
Yangkai Liu1, Yanxiao Wei2, Zhenpeng Cao1
1Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Ocean Engineering, Changsha University of Science & Technology, Changsha 410114, China.
Bioresource technology
|August 27, 2025
まとめ
部分窒素化/アナモックス-ヒドロキシアパタイト (PN/A-HAP) プロセスは,窒素とリンを効果的に除去します. この研究では,PN/A-HAPシステムは,下水処理で安定した低リンレベルを達成できることを示しています.
科学分野:
- 環境工学
- バイオテクノロジー
- 水 の 処理
背景:
- 部分窒素化/アナモックス-ヒドロキシアパタイト (PN/A-HAP) プロセスは,廃棄水から窒素とリンを同時に除去するための経済的解決策を提供します.
- 低リン汚染水の処理のための単段階PN/A-HAP炉の評価は,持続可能な水管理に不可欠です.
研究 の 目的:
- 低リン廃棄水の処理のための単段PN/A-HAP炉の長期的な実現可能性と性能を評価する.
- PN/A-HAPシステムにおける排水液の総リン濃度 (TP-eff) を支配する均衡の限界を特定し理解する.
主な方法:
- エアブリフト内部パーティションバイオリアクターを用いて長期継続的な実験を行った.
- NH4+-Nを350 mg/Lで操作し,水力保持時間は6時間,Ca:TP比は4.0である.
- システム安定性を評価するために,総リン量 (TP-inf) を20から5mg/Lに変化させた.
主要な成果:
- PN/A-HAPシステムは,TP-effを2. 0 ± 0. 3 mg/Lで一貫して維持し,影響する濃度が低下したにもかかわらず,顕著な安定性を示した.
- TP-effを制御する重要な要因として,飽和度指数,リン荷率,およびヒドロキシアパタイト結晶化を含む均衡の制限を特定した.
- リン除去能力は,PN/A-HAPシステム内のこれらの内在的要因によって制限されていることが判明しました.
結論:
- 単段階PN/A-HAP炉は,安定した濃度を達成する低の排水処理のための実現可能な技術です.
- PN/A-HAPプロセスの最適化には,除去の限界を理解することが不可欠です.
- 厳格な排出基準に要求されるより低いTP-effレベルを達成するために,高度な後処理戦略が必要になる可能性があります.
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