title: Comparison of the removal of ethanethiol in twin-biotrickling filters inoculated with strain RG-1 and B350 mixed microorganisms.
abstract: This study aims to compare the biological degradation performance of ethanethiol using strain RG-1 and B350 commercial mixed microorganisms, which were inoculated and immobilized on ceramic particles in twin-biotrickling filter columns. The parameters affecting the removal efficiency, such as empty bed residence time (EBRT) and inlet concentration, were investigated in detail. When EBRT ranged from 332 to 66 s at a fixed inlet concentration of 1.05 mg L(-1), the total removal efficiencies for RG-1 and B350 both decreased from 100% to 70.90% and 47.20%, respectively. The maximum elimination capacities for RG-1 and B350 were 38.36 (removal efficiency=89.20%) and 25.82 g m(-3) h(-1) (removal efficiency=57.10%), respectively, at an EBRT of 83 s. The variation of the inlet concentration at a fixed EBRT of 110 s did not change the removal efficiencies which remained at 100% for RG-1 and B350 at concentrations of less than 1.05 and 0.64 mg L(-1), respectively. The maximum elimination capacities were 39.93 (removal efficiency=60.30%) and 30.34 g m(-3) h(-1) (removal efficiency=46.20%) for RG-1 and B350, respectively, at an inlet concentration of 2.03 mg L(-1). Sulfate was the main metabolic product of sulfur in ethanethiol. Based the results, strain RG-1 would be a better choice than strain B350 for the biodegradation of ethanethiol.
authors.affiliation: The State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. antc99@gig.ac.cn
authors.forename: Taicheng
authors.initials: T
authors.lastname: An
authors.forename: Shungang
authors.initials: S
authors.lastname: Wan
authors.forename: Guiying
authors.initials: G
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Sun
authors.forename: Bin
authors.initials: B
authors.lastname: Guo
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018914:Cells, Immobilized / Q000378:metabolism; D005374:Filtration / Q000379:methods; D007700:Kinetics; D013438:Sulfhydryl Compounds / Q000378:metabolism*; D013455:Sulfur / Q000378:metabolism
chemical_list: D013438:Sulfhydryl Compounds; D013455:Sulfur; C007638:ethanethiol