Characterizing the biotransformation of sulfur-containing wastes in simulated landfill reactors
Copyright © 2016 Elsevier Ltd. All rights reserved.
Veröffentlicht in: | Waste management (New York, N.Y.). - 1999. - 53(2016) vom: 09. Juli, Seite 82-91 |
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1. Verfasser: | |
Weitere Verfasser: | , |
Format: | Online-Aufsatz |
Sprache: | English |
Veröffentlicht: |
2016
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Zugriff auf das übergeordnete Werk: | Waste management (New York, N.Y.) |
Schlagworte: | Journal Article Ash Coal combustion residue Hydrogen sulfide Landfill Sulfur-containing waste Waste Products Sulfur 70FD1KFU70 |
Zusammenfassung: | Copyright © 2016 Elsevier Ltd. All rights reserved. Landfills that accept municipal solid waste (MSW) in the U.S. may also accept a number of sulfur-containing wastes including residues from coal or MSW combustion, and construction and demolition (C&D) waste. Under anaerobic conditions that dominate landfills, microbially mediated processes can convert sulfate to hydrogen sulfide (H2S). The presence of H2S in landfill gas is problematic for several reasons including its low odor threshold, human toxicity, and corrosive nature. The objective of this study was to develop and demonstrate a laboratory-scale reactor method to measure the H2S production potential of a range of sulfur-containing wastes. The H2S production potential was measured in 8-L reactors that were filled with a mixture of the target waste, newsprint as a source of organic carbon required for microbial sulfate reduction, and leachate from decomposed residential MSW as an inoculum. Reactors were operated with and without N2 sparging through the reactors, which was designed to reduce H2S accumulation and toxicity. Both H2S and CH4 yields were consistently higher in reactors that were sparged with N2 although the magnitude of the effect varied. The laboratory-measured first order decay rate constants for H2S and CH4 production were used to estimate constants that were applicable in landfills. The estimated constants ranged from 0.11yr(-1) for C&D fines to 0.38yr(-1) for a mixed fly ash and bottom ash from MSW combustion |
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Beschreibung: | Date Completed 14.02.2018 Date Revised 14.02.2018 published: Print-Electronic Citation Status MEDLINE |
ISSN: | 1879-2456 |
DOI: | 10.1016/j.wasman.2016.01.028 |