title: Effects of Organic-Loading-Rate Reduction on Sludge Biomass and Microbial Community in a Deteriorated Pilot-Scale Membrane Bioreactor.
abstract: The effects of a precipitous decrease in the inlet organic loading rate on sludge reductions and the microbial community in a membrane bioreactor were investigated. The sludge biomass was markedly reduced to 47.4% of the initial concentration (approximately 15,000 mg L(-1)) within 7 d after the organic loading rate was decreased by half (450 to 225 mg chemical oxygen demand L(-1) d(-1)). An analysis of the microbial community structure using high-throughput sequencing revealed an increase in the abundance of facultative predatory bacteria-related operational taxonomic units as well as microorganisms tolerant to environmental stress belonging to the classes Deinococci and Betaproteobacteria.
authors.affiliation: Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST).
authors.forename: Yuya
authors.initials: Y
authors.lastname: Sato
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Hori
authors.forename: Ronald R
authors.initials: RR
authors.lastname: Navarro
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Naganawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Habe
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ogata
mesh_terms: D001419:Bacteria / Q000145:classification / Q000187:drug effects* / Q000235:genetics; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D058448:Biota / Q000187:drug effects*; D059014:High-Throughput Nucleotide Sequencing; D008566:Membranes; D009930:Organic Chemicals / Q000378:metabolism*; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D012722:Sewage