Microbial community structures in conventional activated sludge system and membrane bioreactor (MBR) |
| |
Authors: | Seung Hyuk Baek Krishna Pagilla |
| |
Institution: | (1) Lenox Institute of Water Technology, Lenox, MA, USA;(2) Krofta Engineering Corporation, Lenox, MA, USA;(3) Zorex Corporation, Newtonville, NY, USA;(4) Formerly Senior Principal Engineer, Industrial Biological Systems, ONDEO Degremont Inc., Richmond, VA, USA; |
| |
Abstract: | The microbial community structures of a conventional activated sludge and MBR systems treating the municipal wastewater were
studied using Fluorescent in-situ Hybridization (FISH) analysis to identify differences in both systems. The oligonucleotide probes specific for overall bacteria,
including α-, β-, and γ-subclasses of Proteobacteria, ammonia-oxidizing bacteria (Nitrosomonas), and nitrite-oxidizing bacteria (Nitrobacter) were used to compare the microbial community structure of both systems. A trend of less hybridization with bacteria-specific
probe EUB338 was observed in MBR systems operated under aerobic condition, compared to conventional activated sludge system.
The less hybridization trend with the probes could be associated with low ribosomal RNA (rRNA) content in the biomass, which
suggests that the biomass in the MBR system was not in a physiological state characteristic for growth due to low substrate
per unit biomass |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|