title: Study of the diversity of microbial communities in a sequencing batch reactor oxic-settling-anaerobic process and its modified process.
abstract: To further reveal the mechanism of sludge reduction in the oxic-settling-anaerobic (OSA) process, the polymerase chain reaction - denaturing gradient gel electrophoresis protocol was used to study the possible difference in the microbial communities between a sequencing batch reactor (SBR)-OSA process and its modified process, by analyzing the change in the diversity of the microbial communities in each reactor of both systems. The results indicated that the structure of the microbial communities in aerobic reactors of the 2 processes was very different, but the predominant microbial populations in anaerobic reactors were similar. The predominant microbial population in the aerobic reactor of the SBR-OSA belonged to Burkholderia cepacia, class Betaproteobacteria, while those of the modified process belonged to the classes Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria. These 3 types of microbes had a cryptic growth characteristic, which was the main cause of a greater sludge reduction efficiency achieved by the modified process.
authors.affiliation: a School of Environmental Science and Engineering, Sun Yat-sen University, No. 135 Xingang Road West, Guangzhou, Guangdong 510275, People's Republic of China.|b Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, Guangdong 510275, People's Republic of China.
authors.forename: Lianpeng
authors.initials: L
authors.lastname: Sun
authors.affiliation: a School of Environmental Science and Engineering, Sun Yat-sen University, No. 135 Xingang Road West, Guangzhou, Guangdong 510275, People's Republic of China.
authors.forename: Jianfan
authors.initials: J
authors.lastname: Chen
authors.affiliation: a School of Environmental Science and Engineering, Sun Yat-sen University, No. 135 Xingang Road West, Guangzhou, Guangdong 510275, People's Republic of China.
authors.forename: Xiange
authors.initials: X
authors.lastname: Wei
authors.affiliation: c Foshan Water Group, No. 16 Tongji Road West, Foshan, Guangdong 528000, People's Republic of China.
authors.forename: Wuzhen
authors.initials: W
authors.lastname: Guo
authors.affiliation: c Foshan Water Group, No. 16 Tongji Road West, Foshan, Guangdong 528000, People's Republic of China.
authors.forename: Meishan
authors.initials: M
authors.lastname: Lin
authors.affiliation: a School of Environmental Science and Engineering, Sun Yat-sen University, No. 135 Xingang Road West, Guangzhou, Guangdong 510275, People's Republic of China.
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Yu
mesh_terms: D000693:Anaerobiosis; D020562:Betaproteobacteria / Q000302:isolation & purification; D019149:Bioreactors / Q000382:microbiology*; D058645:Denaturing Gradient Gel Electrophoresis; D016133:Polymerase Chain Reaction; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D012722:Sewage
keywords: croissance cryptique; cryptic growth; diversity of microbial communities; diversité des communautés microbiennes; réduction des boues; sludge reduction; traitement des eaux usées; wastewater treatment