Performance and Microbial Ecology of Bench-and Full-Scale Anaerobic Membrane Bioreactor Treatment of Food Waste
Anaerobic membrane bioreactor (AnMBR) is a key technology to recover energy from food waste during landfill diversion.In this study,the microbial community of a bench-and full-scale AnMBR treating food waste was investigated to elucidate microbial community drivers that improve performance.The full-scale AnMBR investigated was a single-phase systems,whereas both single-phase and two-phase systems were studied at the bench-scale.Monthly and weekly food waste and mixed liquor samples were taken over a period of six months from the full-scale AnMBR and used for high-throughput 16S rRNA and rRNA gene sequencing.Food waste samples showed consistent microbial community activity and structure with no significant temporal shifts.Mixed liquor 16S rRNA sequencing indicated that methanogens comprised 33.4 ± 4.41% of the relative activity,from which aceticlastic methanogens Methanosaeta were most dominant.Hydrogenotrophic methanogens,Methanospirillum and Methanobacterium,also had high relative activity.Syntrophic fatty acid oxidizers comprised 3.97 ± 1.17% of the relative activity,where Smithella were most active at 1.5 ± 0.53%.Ongoing bench-scale AnMBR operation is expected to demonstrate enhanced reactor performance in biogas production and process stability during two-phase digestion.Bench-scale results are expected to inform decisions at the full-scale regarding design and operational parameters that impact performance.
Anaerobic membrane bioreactor food waste microbial community two-phase
Yamrot M.Amha Karim Samy Michael Corbett Adam L.Smith
Astani Department of Civil and Environmental Engineering, University of Southern California, 3620 So Divert, Inc.23 Bradford Street, 3rd Floor, Concord, MA 01742
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
691-694
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）