title: Microaeration for hydrogen sulfide removal in UASB reactor.
abstract: The removal of hydrogen sulfide from biogas by microaeration was studied in Up-flow Anaerobic Sludge Blanket (UASB) reactors treating synthetic brewery wastewater. A fully anaerobic UASB reactor served as a control while air was dosed into a microaerobic UASB reactor (UMSB). After a year of operation, sulfur balance was described in both reactors. In UASB, sulfur was mainly presented in the effluent as sulfide (49%) and in biogas as hydrogen sulfide (34%). In UMSB, 74% of sulfur was detected in the effluent (41% being sulfide and 33% being elemental sulfur), 10% accumulated in headspace as elemental sulfur and 9% escaped in biogas as hydrogen sulfide. The efficiency of hydrogen sulfide removal in UMSB was on average 73%. Microaeration did not cause any decrease in COD removal or methanogenic activity in UMSB and the elemental sulfur produced by microaeration did not accumulate in granular sludge.
authors.affiliation: Department of Water Technology and Environmental Engineering, Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic. Electronic address: lucie.krayzelova@vscht.cz.
authors.forename: Lucie
authors.initials: L
authors.lastname: Krayzelova
authors.affiliation: Department of Water Technology and Environmental Engineering, Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Bartacek
authors.affiliation: Department of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovakia.
authors.forename: Nina
authors.initials: N
authors.lastname: Kolesarova
authors.affiliation: Department of Water Technology and Environmental Engineering, Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic.
authors.forename: Pavel
authors.initials: P
authors.lastname: Jenicek
mesh_terms: D001421:Bacteria, Anaerobic / Q000502:physiology*; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006862:Hydrogen Sulfide / Q000302:isolation & purification* / Q000378:metabolism; D008697:Methane / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D062065:Wastewater / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D006862:Hydrogen Sulfide; D008697:Methane; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Elemental sulfur accumulation; Hydrogen sulfide removal; Microaeration; Sulfur balance; UASB reactor