title: Comparison of biological H2S removal characteristics between a composite packing material with and without functional microorganisms.
abstract: The performances of two identical biofilters, filled with a new composite packing material (named CM-5) embedded with functional microorganisms or sterilized CM-5 without microorganisms, were investigated for H2S treatment. Running parameters in terms of microbial counts, pressure drops, and inlet and outlet H2S concentrations were measured. The results show that the microbial count of the CM-5 was approximately ×105CFU/g before being filled into the biofilter, while that of the sterilized CM-5 was negligible. The functional microorganisms embedded in CM-5 adapted to the environment containing H2S quickly. In most cases, pressure drops of the CM-5 biofilter were slightly higher than those of the sterilized CM-5 biofilter when the gas flow rate was 0.6-2.5 m3/h. The maximum elimination capacity (EC) of the CM-5 biofilter in treating H2S could reach up to 65 g/(m3·h) when the loading rate (LR) was approximately 80 g/(m3·h). If the LR was much higher, the measured EC showed a slight downward trend. The experimental ECs of biofilters were fitted by two typical dynamic models: the Michaelis-Menten model and the Haldane model. Compared with the Michaelis-Menten model, the Haldane model fit the experimental ECs better for the two biofilters because of the presence of the substrate inhibition behaviour.
authors.affiliation: School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, China.
authors.forename: Rencheng
authors.initials: R
authors.lastname: Zhu
authors.affiliation: School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, China.
authors.forename: Shunyi
authors.initials: S
authors.lastname: Li
authors.affiliation: Atmospheric Environment Institute, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Bao
authors.affiliation: Department of Energy Systems and Environment, UMR CNRS 6144 GEPEA, École des Mines de Nantes, Nantes, 44307, France.
authors.forename: Éric
authors.initials: É
authors.lastname: Dumont
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D015169:Colony Count, Microbial; D005374:Filtration / Q000295:instrumentation; D006862:Hydrogen Sulfide / Q000302:isolation & purification*; D007700:Kinetics; D008962:Models, Theoretical; D011312:Pressure
chemical_list: D006862:Hydrogen Sulfide