title: Effects of UV pretreatment on microbial community structure and metabolic characteristics in a subsequent biofilter treating gaseous chlorobenzene.
abstract: To provide insight into effects of UV pretreatment on microorganisms in subsequent biofilters, the changes of microbial community structure and metabolic characteristics of biofilters with (UV-BF) and without (BF) UV pretreatment were studied. The respiratory quinone and BIOLOG methods were used to analyze microbial community structure and metabolic characteristics, respectively. The results indicated the quinone profiles, the species of dominant quinone and its molar fraction of the biofilm in both biofilters showed different behaviors. Ubiquinones-8 and menaquinone-9(H(2)) was the dominant quinones in BF and UV-BF processes, respectively. The dissimilarity index of two biofilters markedly increased to nearly 60 after turning on the UV lamp. The microbial samples from UV-BF process showed higher metabolic activities of 0.040 cm(-1) h(-1) than 0.028 cm(-1) h(-1) in BF process. Moreover, the microorganisms in both biofilters demonstrated distinct metabolic characteristics. Further, the performance of biofilters showed good correlation with microbial community structure and metabolic characteristics.
authors: Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
authors: Can
authors: C
authors: Wang
authors: Jin-Ying
authors: JY
authors: Xi
authors: Hong-Ying
authors: HY
authors: Hu
authors: Yuan
authors: Y
authors: Yao
mesh_terms: D001673:Biodegradation, Environmental; D018441:Biofilms; D001709:Biotechnology / Q000379:methods*; D002722:Chlorobenzenes / Q000737:chemistry*; D005374:Filtration; D005740:Gases; D015233:Models, Statistical; D025341:Principal Component Analysis; D011809:Quinones / Q000737:chemistry; D014451:Ubiquinone / Q000737:chemistry; D014466:Ultraviolet Rays; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000737:chemistry; D014865:Waste Disposal, Fluid; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D002722:Chlorobenzenes; D005740:Gases; D011809:Quinones; D024482:Vitamin K 2; D014451:Ubiquinone; C073355:menaquinone 9; C030778:ubiquinone 8; C031294:chlorobenzene