A simple way to improve a conventional A/O-MBR for high simultaneous carbon and nutrient removal from synthetic municipal wastewater

doi:10.1371/journal.pone.0214976

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Title:	A simple way to improve a conventional A/O-MBR for high simultaneous carbon and nutrient removal from synthetic municipal wastewater
Authors:	Adoonsook, Dome Chia-Yuan Chang(張家源) Wongrueng, Aunnop Pumas, Chayakorn
Contributors:	Chiang Mai Univ, Fac Engn, Dept Environm Engn Ctr Excellence Hazardous Subst Management HSM Ban, Res Program Control Hazardous Contaminants Raw Wa Chia Nan Univ Pharm & Sci, Dept Environm Engn & Sci Wuhan Univ Sci & Technol, Coll Resource & Environm Engn Chiang Mai Univ, Fac Sci, Dept Biol, Ctr Excellence Bioresources Agr Ind & Med
Keywords:	MOVING-BED BIOFILM GLYCOGEN-ACCUMULATING ORGANISMS SUBMERGED MEMBRANE BIOREACTOR PHOSPHORUS REMOVAL MICROBIAL COMMUNITY ACTIVATED-SLUDGE EXTRACELLULAR POLYMERS PERFORMANCE BACTERIA ECOLOGY
Date:	2019-11
Issue Date:	2020-07-29 13:54:37 (UTC+8)
Publisher:	PUBLIC LIBRARY SCIENCE
Abstract:	In this study, two anoxic-oxic membrane bioreactor (A/O-MBR) systems, i.e. conventional and biofilm anoxic-oxic-membrane bioreactors (C-A/O-MBR and BF-A/O-MBR, respectively), were operated in parallel under conditions of complete sludge retention for the purposes of comparing system performance and microbial community composition. Moreover, with the microbial communities, comparisons were made between the adhesive stage and the suspended stage. High average removal of COD, NH4+- N and TN was achieved in both systems. However, TP removal efficiency was remarkably higher in BF-A/O-MBR when compared with C-A/O-MBR. TP mass balance analysis suggested that under complete sludge retention, polyurethane sponges that were added into the anoxic tank played a key role in both phosphorus release and accumulation. The qPCR analysis showed that sponge biomass could maintain a higher level of abundance of total bacteria than the suspended sludge. Meanwhile, AOB and denitrifiers were enriched in the suspended sludge but not in the sponge biomass. Results of illumina sequencing reveal that the compacted sponge in BF-A/O-MBR could promote the growth of bacteria involved in nutrient removal and reduce the amount of filamentous and bacterial growth that is related to membrane fouling in the suspended sludge.
Relation:	Plos One, v.14, n.11, e0214976
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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