Anaerobic self-forming dynamic membrane bioreactors (AnSFDMBRs) for wastewater treatment – Recent advances, process optimization and perspectives. (July 2021)

• Record Type: Journal Article
• Authors: Siddiqui, Muhammad Ahmar; Biswal, Basanta Kumar; Saleem, Mubbshir; Guan, Dao; Iqbal, Asad; Wu, Di; Khanal, Samir Kumar; Chen, Guanghao
• Is Part Of: Bioresource technology. Volume 332(2021)
• Publication Date: 2021-07
• Subjects: Anaerobic dynamic membrane -- Reactor configuration -- Microbial community distribution -- Membrane fouling; 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.2021.125101
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: This review examines recent developments in AnSFDMBR for wastewater treatment. Factors affecting dynamic membrane filtration & operating conditions are discussed. DM is a sludge-based thin-but-compressed layer self-forms on the surface of mesh. Dominant microbes in the bulk sludge are different from those in the dynamic layer. Future works could focus on the supporting material, fouling and biogas purging. Abstract: Recently, anaerobic self-forming dynamic membrane bioreactors (AnSFDMBRs) have attracted increasing attention, and are considered as an alternative to conventional anaerobic membrane bioreactors (AnMBRs). The key advantages of AnSFDMBRs include high flux, low propensity towards fouling, and low capital and operational costs. Although there have been several reviews on AnMBRs, very few reviews on AnSFDMBR system. Previous AnSFDMBR studies have focused on lab-scale to investigate the long-term flux, methods to improve performance and the associated mechanisms. Microbial analysis showed that the phyla namely Proteobacteria, Bacteroidetes and Firmicutes are dominant in both bulk sludge and cake biofilm, but their abundance is low in biocake. This review critically examines the fundamentals of AnSFDMBRs, operational conditions, process optimization and applications. Moreover, the current knowledge gaps (e.g., dynamic membrane module optimization, membrane surface modification and functional microbes enrichment) that should be studied in future to design an efficient AnSFDMBR system for treatment of diverse wastewaters.