Treatment Performance of and Analysis of Microbial Community of Suspended Solids Containing Synthetic Sewage Using Submerged Anaerobic Membrane Bioreactor

A submerged anaerobic membrane bioreactor (SAMBR) combining anaerobic digestion and membrane separation has recently attracted attention, because of its potential to recover methane and reduce sludge production in wastewater treatment. In this study, a lab-scale SAMBR that treats suspended solids co...

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Bibliographic Details
Published inJournal of Japan Society on Water Environment Vol. 36; no. 6; pp. 157 - 164
Main Authors WATANABE, Ryoya, TAKAHASHI, Shintaro, SUNABA, Takayuki, WAKAHARA, Shinichiro, LI, Yu-You
Format Journal Article
LanguageEnglish
Japanese
Published Tokyo Japan Society on Water Environment 2013
Japan Science and Technology Agency
Subjects
Anaerobic bacteria
Anaerobic digestion
Anaerobic microorganisms
Anaerobic treatment
Analysis of microbial community
Archaea
Bacteria
Biochemical oxygen demand
Bioreactors
Chemical oxygen demand
Clones
Cloning
Communities
Hydraulic retention time
Membrane separation
Membranes
Methane
Methanogen
Microorganisms
Organic chemistry
Retention time
Room temperature
Sewage
Sewage treatment
Sludge
Sludge treatment
Solid suspensions
Submerged anaerobic membrane bioreactor
Suspended particulate matter
Suspended solids
Total oxygen demand
Waste treatment
Wastewater treatment
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Summary:A submerged anaerobic membrane bioreactor (SAMBR) combining anaerobic digestion and membrane separation has recently attracted attention, because of its potential to recover methane and reduce sludge production in wastewater treatment. In this study, a lab-scale SAMBR that treats suspended solids containing synthetic sewage was continuously operated for 106 days at room temperature (25°C) to investigate the effect of hydraulic retention time (HRT) on its treatment performance and microbial community. HRT was changed from 48 to 6 hours in 4 steps. At HRT of 12 hours, the chemical oxygen demand (COD) and biochemical oxygen demand removal rates were 94%, and 95% respectively, and 64.6% of input COD was converted to methane. On the basis of the results of cloning analysis, Methanosaeta and Methanoregula were found to be the two dominant Archaea genera, in the reactor. In the clone library of Bacteria, many unclassified bacteria have been detected, and about 21% of facultative anaerobic bacteria have been detected among all the clones.
ISSN:0916-8958
1881-3690
DOI:10.2965/jswe.36.157