Acceleration of start-up of moving bed biofilm reactor at low temperature by adding specialized quorum sensing bacteria. (August 2022)

• Record Type: Journal Article
• Authors: Fu, Hui-min; Wang, Jinfeng; Ren, Hongqiang; Ding, Lili
• Is Part Of: Bioresource technology. Volume 358(2022)
• Publication Date: 2022-08
• Subjects: Bioaugmentation -- Quorum sensing -- Moving bed biofilm reactor -- Biofilm formation -- Low temperature; 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.2022.127249
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Bioaugmented MBBR achieved higher COD and NH4 + -N removal rate. Bioaugmented BH3 T increased the adhesion properties of the biofilm. Bioaugmented BH3 T promoted the growth of functional bacteria at low temperatures. Bioaugmented BH3 T promoted the rapid start-up of the reactor at low temperatures. Abstract: This study aims to accelerate biofilm formation and operational performance of moving bed biofilm reactor (MBBR) at 5 ℃ by adding specialized Quorum Sensing bacteria ( sphingomonas rubra BH3 T ). Results showed that bio augmented MBBR (RS ) achieved a higher chemical oxygen demand and NH4 + -N removal rate (93% and 75%), which in accordance with its increased biofilm thickness, higher biofilm activity, and nitrifying bacteria abundance ( Nitrospira ). The increased biofilm thickness (60.23 %) during the whole operating time, accompanied by more potent adhesion force (61.59 %), was related to increased polysaccharides and proteins in the biofilm. Pyrosequencing analysis indicated that BH3 T contributed to higher species richness and triggered the rapid growth of precursor microorganisms ( Nakamurella, Micropruina, and Zoogloea ) and the enrichment of multifunctional microorganisms ( Pseudomonas, Aeromonas, Arcobacter, Dechloromonas, and Flavobacterium ) at low temperatures. This study provides an economical and practical new insight into accelerating start-up of MBBR system at low temperature.