MBRの消費電力低減を目的とした曝気風量制御

摘要

本稿では,MBR (Membrane Bio-Reactor:膜分離活性汚泥法）の消費電力低減を目的とした洗 浄風量制御を提案し，実規模のMBR施設にてその効果を評価した結果を示す。筆者らは，膜ろ過 抵抗モデルに線形回帰モデルを組合せた膜差圧予測モデルを構築し,その予測値に基づき洗浄風量 を制御する手法を開発した。本稿では，開発した洗浄風量制御をMBR実施設に適用し，その風量 削減効果に関し,実証評価を行った結果にっいて報告する。%This paper proposes a novel aeration control scheme for reducing power consumption in MBR process and shows the demonstration results of the proposed control scheme at a full-scale MBR plant. The control system performs membrane air scour control based on the prediction of transmembrane pressure (TMP). For scouring aeration control, we developed a TMP prediction model which combined membrane filtration model with linear regression model to associate MBR operation condition and the aeration control scheme based on the prediction. An experiment was carried out with a full-scale membrane unit, and the results indicate that the control scheme could reduce the air volume for scouring aeration.