The effect of the origin of MSWI bottom ash on the H2S elimination from landfill biogas

•Field tests compared the capacity of 6 MSWI BAs to remove H2S from landfill gas.•The origin of MSWI BA has an influence on its potential for biogas desulfurization.•Adsorption capacity of BA from a newer incinerator is 3 times higher than the rest.•A high iron content, surface area and quench phase...

Full description

Saved in:
Bibliographic Details
Published in:Waste management (Elmsford) 2017-12, Vol.70, p.158-169
Main Authors: Fontseré Obis, Marta, Germain, Patrick, Bouzahzah, Hassan, Richioud, Alain, Benbelkacem, Hassen
Format: Article
Language:English
Subjects:
Adsorption capacity
Bottom ash
Desulfurization
Hydrogen sulfide
Landfill biogas
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Field tests compared the capacity of 6 MSWI BAs to remove H2S from landfill gas.•The origin of MSWI BA has an influence on its potential for biogas desulfurization.•Adsorption capacity of BA from a newer incinerator is 3 times higher than the rest.•A high iron content, surface area and quench phase in BA increase H2S elimination. Municipal Solid Waste Incineration (MSWI) Bottom Ash (BA) is a potential alternative adsorbent for biogas treatment due to its reactivity with hydrogen sulfide (H2S). The quality of BA depends however on the nature of the waste and the process technology of the waste incineration facility. To determine whether the origin of the BA could have an influence on its H2S elimination efficiency, comparative experimental tests were conducted in a landfill site with six bottom ashes from different MSW incinerators. Results showed that one of the BAs (A) had a much higher adsorption capacity than the rest (B–F), with 37g H2S/kg dry BA, compared to 11–16g H2S/kg dry BA for the other bottom ashes. Detailed physico-chemical analyses of the six BA were performed and complemented by principal component analysis to understand the different behaviors. BA iron content and specific surface area provided by the quench product stood out as key factors that promote the elimination of H2S.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2017.09.014