A comprehensive study into fouling properties of extracellular polymeric substance (EPS) extracted from bulk sludge and cake sludge in a mesophilic anaerobic membrane bioreactor. (September 2015)

• Record Type: Journal Article
• Authors: Ding, Yi; Tian, Yu; Li, Zhipeng; Zuo, Wei; Zhang, Jun
• Is Part Of: Bioresource technology. Volume 192(2015)
• Page Start: 105
• Page End: 114
• Publication Date: 2015-09
• Subjects: Anaerobic membrane bioreactor -- Fouling properties -- Extracellular polymeric substances (EPS) -- Bulk sludge -- Cake sludge; 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.2015.05.067
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: EPS fractions were extracted from bulk sludge and cake sludge in a mesophilic AnMBR. Fouling properties of EPS extracted from bulk and cake sludge were different. The adhesion and cohesion interaction and fouling layer properties were investigated. EPS fractions were fractionated into five components to obtain their characteristics. The EPS fractions with more HPO-N induced severer membrane fouling. Abstract: This study focused on the fouling behaviors of extracellular polymeric substances (EPS) in a mesophilic anaerobic membrane bioreactor (AnMBR) to obtain the relations of EPS specific constituents with membrane fouling. It was found that for the EPS extracted from bulk sludge, the LB-EPS induced the largest flux decline; however, for EPS extracted from cake sludge, the S-EPS caused the highest flux decline. The preferential rejection fraction by membrane further confirmed that the greater flux decline was exhibited with the higher percent rejection of EPS fractions. The adhesion and cohesion interactions of EPS fractions and membranes could explain the different rejection rates of the EPS components. The structural characteristics analysis indicated that the fouling layers of different EPS fractions with the greater loss of filterability had the smaller porosity. Further investigations demonstrated that these changes could be attributed to the different content of HPO-N in EPS fractions.