Performance of simultaneous nitrification–denitrification and denitrifying phosphorus and manganese removal by driving a single-stage moving bed biofilm reactor based on manganese redox cycling. (October 2022)

• Record Type: Journal Article
• Authors: Shao, Sicheng; Zhong, Jinfeng; Wang, Chunxiao; Pan, Dandan; Wu, Xiangwei
• Is Part Of: Bioresource technology. Volume 362(2022)
• Publication Date: 2022-10
• Subjects: Moving bed biofilm reactor (MBBR) -- Nutrient -- Extracellular polymeric substances -- Microbial community; 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.2022.127846
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Manganese redox cycling enhanced pollutants removal by single-stage MBBR. Single-stage MBBR improved the TN removal under low C/N ratio. NH4 + -N, NO3 – -N, TP, Mn 2+, and COD were removed synchronously in the MBBR. Form and content of manganese element were characterized in the biofilm. Specific functional biofilm was formed in the MBBR system. Abstract: Simultaneous removal of NH4 + -N, NO3 – -N, COD, and P by manganese redox cycling in nutrient wastewater was established with a single-stage moving bed biofilm reactor (MBBR) under low C/N ratio. When sodium succinate replaced the conventional denitrifying carbon source, removal efficiencies of TN, NO3 – -N, NH4 + -N, TP, and Mn 2+ were 65.13 %, 79.63 %, 92.79 %, 51.57 %, and 68.10 %, respectively. Based on modified Stover-Kincannon model, 11.03 and 10.05 mg TN·L −1 ·h −1 of Umax values were obtained with sodium acetate and sodium succinate as substrates. Extracellular polymeric substances were used to evaluate the characteristics of biofilm, and microbial community of biofilm was identified. Transformation processes of NO3 – -N, NH4 + -N, Mn 2+, and P were investigated, suggesting that the main functional groups (e.g., CO, Mn-O, and CN bonds) participated in N, P, and Mn 2+ removal, and MnO2 was the main component of biogenic manganese oxides. This study provides a new strategy for nutrients removal by Mn 2+ driven MBBR.