title: The performance of a two-layer biotrickling filter filled with new mixed packing materials for the removal of H2S from air.
abstract: In the work described here, a two-layer biotrickling filter filled with new packing materials was used to remove H2S from air. The upper layer of the filter was packed with activated carbon-loaded polyurethane, whereas the lower layer was filled with modified organism-suspended fillers. The effects of inlet load, empty bed residence time (EBRT) from 79 s to 53 s, pH and contaminant starvation time were investigated. For loads of 15-50 g/(m(3) h), the average removal efficiency (RE) was higher than 96% under a consistent supply of pollutants. The critical elimination capacity was 39.95 g/(m(3) h) for an EBRT of 53 s with an RE of 99.9%. The two-layer BTF was capable of withstanding contaminant starvation periods for 1.5 d and 7 d with only a few hours of recovery time. The biodegradation kinetics was studied using Michaelis-Menten type equations under different EBRTs. At an EBRT of 66 s, the optimal kinetic constants rmax and Km were 333.3 g/(m(3) h) and 0.93 g/m(3), respectively. During the operation, the two-layer BTF performed well under various reasonable conditions.
authors.affiliation: The National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China. Electronic address: ywchen@njtech.edu.cn.
authors.forename: Yingwen
authors.initials: Y
authors.lastname: Chen
authors.affiliation: The National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.affiliation: The National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China.
authors.forename: Shuo
authors.initials: S
authors.lastname: He
authors.affiliation: College of Material Science and Engineering, Nanjing Tech University, Nanjing 210009, China.
authors.forename: Shemin
authors.initials: S
authors.lastname: Zhu
authors.affiliation: The National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China.
authors.forename: Shubao
authors.initials: S
authors.lastname: Shen
mesh_terms: D000393:Air Pollutants / Q000302:isolation & purification / Q000378:metabolism; D001673:Biodegradation, Environmental; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D006862:Hydrogen Sulfide / Q000302:isolation & purification* / Q000378:metabolism; D007700:Kinetics; D059013:Microbial Consortia; D011140:Polyurethanes / Q000737:chemistry; D012722:Sewage / Q000382:microbiology
chemical_list: D000393:Air Pollutants; D011140:Polyurethanes; D012722:Sewage; D006862:Hydrogen Sulfide
keywords: Biotrickling filter; H(2)S; Packing material; Removal efficiency