A Simple way to Improve a Conventional A/O-MBR for High Simultaneous Carbon and Nutrients Removal from Synthetic Municipal Wastewater

Autor: Chayakorn Pumas, Dome Adoonsook, Chang Chia-Yuan, Aunnop Wongrueng
Jazyk: angličtina
Rok vydání: 2019
Předmět:
0208 environmental biotechnology
Marine and Aquatic Sciences
Biomass
02 engineering and technology
010501 environmental sciences
Bacterial growth
Wastewater
Membrane bioreactor
01 natural sciences
Sludge
Bioreactors
Nutrient
Water Quality
Limnology
Materials
Multidisciplinary
Sewage
Ecology
biology
Microbiota
Chemical Reactions
Pulp and paper industry
Anoxic waters
Nitrification
Aerobiosis
Chemistry
Shannon Index
Physical Sciences
Medicine
Research Article
DNA
Bacterial
Ecological Metrics
Nitrogen
Science
Materials Science
chemistry.chemical_element
Microbiology
Water Purification
Phosphates
Bioreactor
0105 earth and related environmental sciences
Bacteria
Phosphorus
Ecology and Environmental Sciences
Membrane fouling
Chemical Compounds
Organisms
Biofilm
Biology and Life Sciences
Species Diversity
Nutrients
biology.organism_classification
Carbon
020801 environmental engineering
Effluent
chemistry
Microbial population biology
Biofilms
Earth Sciences
Zdroj: PLoS ONE, Vol 14, Iss 11, p e0214976 (2019)
PLoS ONE
DOI: 10.1101/590042
Popis: 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.
Databáze: OpenAIRE
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