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Bioresour Technol. 2014 Nov;172:297-302. doi: 10.1016/j.biortech.2014.09.056. Epub 2014 Sep 20.

Microaeration for hydrogen sulfide removal in UASB reactor.

Author information

1
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.
2
Department of Water Technology and Environmental Engineering, Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic.
3
Department of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovakia.

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.

KEYWORDS:

Elemental sulfur accumulation; Hydrogen sulfide removal; Microaeration; Sulfur balance; UASB reactor

PMID:
25270045
DOI:
10.1016/j.biortech.2014.09.056
[Indexed for MEDLINE]

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