title: Simultaneous removal of ammonia and hydrogen sulfide gases using biofilter media from the biodehydration stage and curing stage of composting.
abstract: Biofiltration of NH3and H2S with different packing media, biodehydration stage compost (BSC), and curing stage compost (CSC) was studied. Meanwhile, fluorescence excitation-emission matrix (EEM) spectroscopy was used to characterize the conversion mechanisms of organic matter during these biofiltration processes. Both biofilters were effective for the simultaneous removal of NH3and H2S when inlet concentrations of NH3and H2S were 0-50 and 50-250 mg/m3, respectively. An abrupt increase in the inlet gas concentrations of NH3and H2S to 100-150 and 200-250 mg/m3, respectively, caused the decrease in the removal efficiencies (REs) of NH3and H2S in the BSC biofilter, followed by a slow upturn. By contrast, relatively steady REs of both NH3and H2S were observed in the CSC biofilter. After 60 days of operation, the average REs of NH3and H2S were more than 95 % in the CSC biofilter. During the operation of CSC, nitrate and nitrite peaked around the 30th day, whereas sulfate showed a steady increase. The excitation-emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC) indicated that the simultaneous inlet of NH3and H2S facilitated the degradation of protein-like substances, whereas humic-like substances played an important role in the packing filters for the treatment of the two odorous pollutants.
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 8, Dayangfang, Beiyuan Road, Beijing, 100875, China.|State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Mingxiao
authors.initials: M
authors.lastname: Li
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Tianming
authors.initials: T
authors.lastname: Xia
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Hao
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Dongming
authors.initials: D
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 8, Dayangfang, Beiyuan Road, Beijing, 100875, China. xibeidou@263.net.|State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China. xibeidou@263.net.
authors.forename: Beidou
authors.initials: B
authors.lastname: Xi
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 8, Dayangfang, Beiyuan Road, Beijing, 100875, China.|State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Liu
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000378:metabolism; D000641:Ammonia / Q000032:analysis* / Q000302:isolation & purification; D019149:Bioreactors / Q000382:microbiology; D002681:China; D005163:Factor Analysis, Statistical; D005374:Filtration / Q000379:methods*; D005740:Gases / Q000032:analysis; D006812:Humic Substances / Q000032:analysis; D006862:Hydrogen Sulfide / Q000032:analysis* / Q000302:isolation & purification; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D012987:Soil / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D005740:Gases; D006812:Humic Substances; D009566:Nitrates; D009573:Nitrites; D012987:Soil; D000641:Ammonia; D006862:Hydrogen Sulfide
keywords: Biofilter; Compost; Fluorescence spectroscopy; H2S; NH3; Parallel factor