title: [Bioaugmented removal of pyridine and the microbial community dynamic analysis].
abstract: The bioaugmented removal of pyridine was investigated through introducing immobilized Paracoccus sp. strain KT-5 capable of degrading pyridine into the lab-scale sequencing batch reactor (SBR) inoculated with activated sludge. The terminal restriction fragment length polymorphisms (T-RFLP) was used to analyzed the microbial community dynamics of two reactors during the whole operation process. The experimental results indicated that the introduction of immobilized strain KT-5 into the SBR could speed up the start-up of reactor, compared to the non-bioaugmented SBR. When the initial concentration of pyridine varied from 195.6 mg x L(-1) to 586.8 mg x L(-1), the bioaugmented effect was not significant; however, when the initial concentration of pyridine was 782.4-2934 mg x L(-1), the bioaugmentation role in pyridine degradation was obvious. The analysis of T-RFLP indicated that the introduced immobilized strain KT-5, as a dominant strain, always existed in both free and immobilized biomass of the bioaugmented SBR.
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China. linandqiao@yahoo.com.cn
authors.forename: Lin
authors.initials: L
authors.lastname: Qiao
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.forename: Jian-Long
authors.initials: JL
authors.lastname: Wang
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D010230:Paracoccus / Q000254:growth & development / Q000378:metabolism*; D011725:Pyridines / Q000302:isolation & purification* / Q000378:metabolism; D012722:Sewage / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D011725:Pyridines; D012722:Sewage; D062065:Wastewater; C023666:pyridine