Seasonal temperatures impact on the mass flows in the innovative integrated process of anaerobic membrane bioreactor and one-stage partial nitritation-anammox for the treatment of municipal wastewater. (April 2022)

• Record Type: Journal Article
• Authors: Rong, Chao; Wang, Tianjie; Luo, Zibin; Guo, Yan; Kong, Zhe; Wu, Jiang; Qin, Yu; Hanaoka, Taira; Sakemi, Shinichi; Ito, Masami; Kobayashi, Shigeki; Kobayashi, Masumi; Li, Yu-You
• Is Part Of: Bioresource technology. Volume 349(2022)
• Publication Date: 2022-04
• Subjects: Municipal wastewater -- Anaerobic membrane bioreactor -- Partial nitritation-anammox -- Mass flow -- Seasonal temperature; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.126864
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Mass flows of C and N were redesigned by AnMBR-PN/A. Removal efficiencies of COD and TN were 90.3%-95.1% and 75.0%-81.7%, respectively. 48.4%-63.1% of C was captured as CH4 and 26.7%-39.7% of C was captured as sludge. 8.5%-16.1% of N was entrapped by membrane and 45.3%-58.1% of N was removed by PN/A. AnMBR and PN/A mutually complement each other ensured excellent system performance. Abstract: A pilot-scale anaerobic membrane bioreactor (AnMBR) integrated with a one-stage partial nitritation-anammox (PN/A) reactor was operated for the treatment of municipal wastewater (MWW) at seasonal temperatures of 15–25 °C. The removal efficiencies of COD and total nitrogen (TN) were always > 90% and > 75% respectively. The methanogenesis and PN/A were identified as the primary removal pathways of COD and TN, respectively, and were suppressed at low temperatures. With the temperature dropped from 25 °C to 20 °C to 15 °C, the methane-accounted COD decreased from 63.1% to 59.6% to 48.4%, and the PN/A-accounted TN decreased from 58.1% to 51.7% to 45.3%. The AnMBR and PN/A mutually complement each other in this combined process, as the AnMBR removed 8.5%-16.1% of TN by sludge entrainment and the PN/A reactor removed 2.6%-3.4% of COD by denitrification and aerobic oxidation. These results highlighted the strong feasibility of applying the AnMBR-PN/A process to the treatment of MWW in temperate climate.