| Title: | Occurrence and abatement of volatile sulfur compounds during biogas production |
| Author(s): | Andersson FA; Karlsson A; Svensson BH; Ejlertsson J; |
| Address: | "Department of Water and Environmental Studies, Linkoping University, Sweden. annka@tema.liu.se" |
| DOI: | 10.1080/10473289.2004.10470953 |
| ISSN/ISBN: | 1096-2247 (Print) 1096-2247 (Linking) |
| Abstract: | "Volatile sulfur compounds (VSCs) in biogas originating from a biogas production plant and from a municipal sewage water treatment plant were identified. Samples were taken at various stages of the biogas-producing process, including upgrading the gas to vehicle-fuel quality. Solid-phase microextraction was used for preconcentration of the VSCs, which were subsequently analyzed using gas chromatography in combination with mass spectrometry. Other volatile organic compounds present also were identified. The most commonly occurring VSCs in the biogas were hydrogen sulfide, carbonyl sulfide, methanethiol, dimethyl sulfide, and dimethyl disulfide, and hydrogen sulfide was not always the most abundant sulfur (S) compound. Besides VSCs, oxygenated organic compounds were commonly present (e.g., ketones, alcohols, and esters). The effect of adding iron chloride to the biogas reactor on the occurrence of VSCs also was investigated. It was found that additions of 500-g/m3 substrate gave an optimal removal of VSCs. Also, the use of a prefermentation step could reduce the amount of VSCs formed in the biogas process. Moreover, in the carbon dioxide scrubber used for upgrading the gas, VSCs were removed efficiently, leaving traces (ppbv levels). The scrubber also removed other organic compounds" |
| Keywords: | Air Pollutants/*analysis/*isolation & purification Air Pollution/*prevention & control *Bioelectric Energy Sources Corrosion Environmental Monitoring Fertilizers Odorants Sulfur Compounds/*analysis/*isolation & purification Volatilization; |
| Notes: | "MedlineAndersson, Fras Annika T Karlsson, Anna Svensson, Bo H Ejlertsson, Jorgen eng 2004/08/12 J Air Waste Manag Assoc. 2004 Jul; 54(7):855-61. doi: 10.1080/10473289.2004.10470953" |
