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Sulfate and organic matter concentration in relation to hydrogen sulfide generation at inert solid waste landfill site – Limit value for gypsum


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Title: Sulfate and organic matter concentration in relation to hydrogen sulfide generation at inert solid waste landfill site – Limit value for gypsum
Authors: Asakura, Hiroshi
Issue Date: Sep-2015
Publisher: Elsevier Limited
Citation: Waste Management, 43, pp.328-334; 2015
Abstract: In order to suggest a limit value for gypsum (CaSO4) for the suppression of hydrogen sulfide (H2S) generation at an inert solid waste landfill site, the relationship between raw material (SO4 and organic matter) for H2S generation and generated H2S concentration, and the balance of raw material (SO4) and product (H2S) considering generation and outflow were investigated. SO4 concentration should be less than approximately 100mg-SO4/L in order to suppress H2S generation to below 2000ppm. Total organic carbon (TOC) concentration should be less than approximately 200mg-C/L assuming a high SO4 concentration. The limit value for SO4 in the ground is 60mg-SO4/kg with 0.011wt% as gypsum dihydrate, i.e., approximately 1/10 of the limit value in inert waste as defined by the EU Council Decision (560mg-SO4/kg-waste). The limit value for SO4 in inert waste as defined by the EU Council Decision is high and TOC is strictly excluded. The cumulative amount of SO4 outflow through the liquid phase is much larger than that through the gas phase. SO4 concentration in pore water decreases with time, reaching half the initial concentration around day 100. SO4 reduction by rainfall can be expected in the long term.
Keywords: Hydrogen sulfide / Landfill site / Limit value / Organic matter / Sulfate / Waste gypsum board
URI: http://hdl.handle.net/10069/35823
ISSN: 0956053X
DOI: 10.1016/j.wasman.2015.06.018
Rights: © 2015 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/35823

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