Application of cell entrapping beads for Quorum Quenching technique in submerged membrane bioreactor | Zendy

S. Ansar Ahmed | Zendy; Shinho Chung | Zendy; Sohail M. Noman | Zendy; I. A. Qazi | Zendy; Alexander W. Justin | Zendy

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Application of cell entrapping beads for Quorum Quenching technique in submerged membrane bioreactor

Author(s) -

S. Ansar Ahmed,

Shinho Chung,

Sohail M. Noman,

I. A. Qazi,

Alexander W. Justin

Publication year - 2020

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2020.149

Subject(s) - biofouling , quorum quenching , biofilm , membrane bioreactor , polyvinyl alcohol , membrane , bioreactor , chemistry , effluent , sodium alginate , chemical engineering , quenching (fluorescence) , population , quorum sensing , environmental engineering , sodium , environmental science , bacteria , biology , organic chemistry , biochemistry , physics , demography , quantum mechanics , sociology , engineering , fluorescence , genetics

Biofouling is unwanted accumulation of microbial population on the membrane surface which limits the use of membrane bioreactor (MBR) in the market. Disruption of the biofilm formation by Quorum Quenching (QQ) by using cell entrapping beads (CEBs) is an approach with great potential to control membrane biofouling as the beads used provide not only mitigating effect on biofilm formation, by interfering Quorum Sensing, but also physical forces to detach the biofilm from the membrane surface. This research aimed to develop QQ-CEB with locally available chemicals in Pakistan and its application to evaluate the QQ effect together with physical and chemical cleaning. Various CEBs were made of different mixtures of sodium alginate and polyvinyl alcohol (PVA) and their quality was tested considering physical and biological aspects. Rhodococcus sp. BH4 and Pseudomonas putida were entrapped in the CEBs and then introduced in MBR as one of biofouling control methods along with standard backwash and chemical backwash. The CEBs made of specific concentration of PVA were proven to be more durable and helpful in mitigating biofouling as compared to that of sodium alginate. An MBR operated with PVA-alginate QQ CEBs together with chemical backwash showed the best performance without deterioration of effluent quality.

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