title: Steady- and transient-state H2S biofiltration using expanded schist as packing material.
abstract: The performances of three laboratory-scale biofilters (BF1, BF2, BF3) packed with expanded schist for H(2)S removal were studied at different empty bed residence times (EBRT=35, 24 and 16s) in terms of elimination capacity (EC) and removal efficiency (RE). BF1 and BF2 were filled with expanded schist while BF3 was filled with both expanded schist and a nutritional material (UP20; 12% vol). BF1 and BF3 were inoculated with activated sludge, whereas BF2 was not inoculated. A maximum EC of 42 g m(-3) h(-1) was recorded for BF3 at EBRT=35 s demonstrating the ability of schist to treat high H(2)S loading rates, and the ability of UP20 to improve H(2)S removal. Michaelis-Menten and Haldane models were fitted to the experimental elimination capacities while biofilter responses to transient-state conditions in terms of removal efficiency during shock load events were also evaluated for BF1 and BF3.
authors: Departamento de Ingeniería Civil y Ambiental, Facultad de Ingeniería, Universidad de los Andes, Bogotá, Colombia.
authors: A C
authors: AC
authors: Romero Hernandez
authors: M S
authors: MS
authors: Rodríguez Susa
authors: Y
authors: Y
authors: Andrès
authors: E
authors: E
authors: Dumont
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors; D005374:Filtration / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D006862:Hydrogen Sulfide / Q000302:isolation & purification*; D007700:Kinetics; D012212:Rheology; D013997:Time Factors
chemical_list: D006862:Hydrogen Sulfide