Title :
Microbial Community Structures in Two Membrane Bioreactors: Sequential and Continuous Modes
Author :
Li, Jixiang ; He, Shuying ; Wang, Xiaojia ; Xia, Siqing ; Duan, Liang
Author_Institution :
State Key Lab. of Pollution Control & Resource Reuse, Tongji Univ., Shanghai, China
Abstract :
A sequential membrane reactor (SMBR) and a continuous membrane reactor (CMBR) were developed with focus on reactor performance and microbial community structure. The two MBRs all showed better removal of chemical oxygen demand (COD) and ammonia-nitrogen (NH4+-N) treating synthetic wastewater, but the SMBR system showed markedly low membrane fouling rate because of sufficient relaxation of membranes. The results of denaturing gradient gel electrophoresis (DGGE) demonstrated the diversity of total bacteria and and β-proteobacteria ammonia-oxidizing bacteria (β-AOB) in CMBR was more complex than that of SMBR. Real-time PCR analysis indicated the number of β-AOB in CMBR was larger than that of SMBR, which resulted in high NH4+-N removal.
Keywords :
ammonia; biochemistry; biomembranes; bioreactors; cellular biophysics; electrophoresis; gels; microorganisms; molecular biophysics; nitrogen; wastewater treatment; β-proteobacteria ammonia-oxidizing bacteria; ammonia-nitrogen; chemical oxygen demand removal; continuous membrane bioreactor; denaturing gradient gel electrophoresis; membrane fouling rate; membrane relaxation; microbial community structures; sequential membrane bioreactor; synthetic wastewater; total bacteria diversity; Biomembranes; Bioreactors; Chemicals; Content addressable storage; DNA; Filtration; Inductors; Microorganisms; Pollution control; Wastewater treatment;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5517089
