継続的な流れの下での部分脱窒化/アナモクスの回復に関するメカニズム的洞察:窒素供給と微生物の競争のバランス

Rui Du¹, Cong Li¹, Shenbin Cao²

¹National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China.

Environmental research

|September 4, 2025

まとめ

障害後のアナモックス (PD/A) システムと結合した部分的脱窒化を再活性化することは困難です. 新鮮な泥でバイオアグメンテーションは,連続フローシステムでの窒素除去効率の回復の鍵です.

科学分野:

環境微生物学
汚水処理工学
生地化学のサイクル

背景:

アナモックス (PD/A) と結合した部分脱窒素化は,低炭素でエネルギー効率の良い都市廃棄水の窒素除去戦略です.
混乱後のPD/Aシステムの再起動は,特に連続フローの原子炉では,複雑な微生物のダイナミクスのために困難です.

研究の目的:

蓄積された粒状のスラグでシードされた連続フローのPD/Aプロセスの回収ダイナミクスを体系的に評価する.
継続的なフロー条件下でPD/Aシステムの再活性化を制御する重要な要因と微生物の反応を特定する.

主な方法:

7段階の操作を行いました影響する窒素を操作し,炭素を投与し,バイオアグメントを使用します.
分析された泥の形状,支配的な微生物集団,窒素除去効率 (NRE) のような重要なプロセスパラメータ.
採掘の各段階における窒素の蓄積と消費の割合を評価した.

主要な成果:

アナモックス菌より早く回復し,窒素の利用を制限した.
断続的な炭素投与により,窒素からニートリートへの変換は改善されたが,アナモックス回収は不十分であった.
新鮮なPD/Aスラッドによるバイオアグメンテーションにより,回収が著しく加速され,NREは88.2%に達した.
微生物コミュニティのシフトは,クロロフレキシとゾーグロエアの濃縮を含み,プロセスの安定性と炭素競争に影響を与えました.

結論:

窒素の利用可能性はPD/Aシステムの回復に不可欠です.
炭素源に対する微生物の競争と泥の形態の変化は,システムの安定性に影響します.
バイオアグメンテーションは,連続フローのアプリケーションにおける堅固なPD/Aシステムの再活性化のための効果的な戦略です.

キーワード:

バイオアグメンテーション連続流量炉微生物の競争窒素の蓄積部分脱窒化/アナモックス (PD/A)システムの回復

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