Functional Determinants of Extracellular Polymeric Substances in Membrane Biofouling: Experimental Evidence from Pure-Cultured Sludge Bacteria | Zendy

Naga Raju Maddela | Zendy; Zhongbo Zhou | Zendy; Zhong Yu | Zendy; Shanshan Zhao | Zendy; Fangang Meng | Zendy

Open Access

Functional Determinants of Extracellular Polymeric Substances in Membrane Biofouling: Experimental Evidence from Pure-Cultured Sludge Bacteria

Author(s) -

Naga Raju Maddela,

Zhongbo Zhou,

Zhong Yu,

Shanshan Zhao,

Fangang Meng

Publication year - 2018

Publication title -

applied and environmental microbiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.552

H-Index - 324

eISSN - 1070-6291

pISSN - 0099-2240

DOI - 10.1128/aem.00756-18

Subject(s) - biofouling , extracellular polymeric substance , membrane fouling , membrane , membrane bioreactor , bacteria , fouling , chemistry , uronic acid , bioreactor , wastewater , glycosidic bond , chemical engineering , biochemistry , polysaccharide , biology , biofilm , environmental engineering , organic chemistry , enzyme , environmental science , engineering , genetics

Membrane biofouling is one of the main challenges for the operation of membrane-based processes used for water and wastewater treatment. This study revealed the functional determinants of EPS in membrane biofouling of 23 bacterial strains isolated from a full-scale membrane bioreactor (MBR) plant. We found that an α-1,4-glycosidic bond, amide II, and uronic acids of EPS significantly correlated with the fouling potentials of bacteria. The roles of these EPS groups in membrane fouling were impacted by calcium resulting from EPS-calcium interactions. In addition, our results also demonstrated that any perturbations in the sludge bacterial community in MBRs can lead to varied filtration potentials of the bulk liquor.

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