title: Linking TFT-LCD wastewater treatment performance to microbial population abundance of Hyphomicrobium and Thiobacillus spp.
abstract: This study investigated the linkage between performance of two full-scale membrane bioreactor (MBR) systems treating thin-film transistor liquid crystal display (TFT-LCD) wastewater and the population dynamics of dimethylsulfoxide (DMSO)/dimethylsulfide (DMS) degrading bacteria. High DMSO degradation efficiencies were achieved in both MBRs, while the levels of nitrification inhibition due to DMS production from DMSO degradation were different in the two MBRs. The results of real-time PCR targeting on DMSO/DMS degrading populations, including Hyphomicrobium and Thiobacillus spp., indicated that a higher DMSO oxidation efficiency occurred at a higher Hyphomicrobium spp. abundance in the systems, suggesting that Hyphomicrobium spp. may be more important for complete DMSO oxidation to sulfate compared with Thiobacillus spp. Furthermore, Thiobacillus spp. was more abundant during poor nitrification, while Hyphomicrobium spp. was more abundant during good nitrification. It is suggested that microbial population of DMSO/DMS degrading bacteria is closely linking to both DMSO/DMS degradation efficiency and nitrification performance.
authors.affiliation: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Fukushima
authors.forename: Liang-Ming
authors.initials: LM
authors.lastname: Whang
authors.forename: Po-Chun
authors.initials: PC
authors.lastname: Chen
authors.forename: Dyah Wulandari
authors.initials: DW
authors.lastname: Putri
authors.forename: Ming-Yu
authors.initials: MY
authors.lastname: Chang
authors.forename: Yi-Ju
authors.initials: YJ
authors.lastname: Wu
authors.forename: Ya-Ching
authors.initials: YC
authors.lastname: Lee
mesh_terms: D019149:Bioreactors; D020582:Hyphomicrobium / Q000254:growth & development / Q000302:isolation & purification / Q000502:physiology*; D013855:Thiobacillus / Q000254:growth & development / Q000302:isolation & purification / Q000502:physiology*; D062065:Wastewater / Q000737:chemistry* / Q000382:microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D062065:Wastewater