Schaum, Christian ; Fundneider, Thomas ; Cornel, Peter (2016):
Analysis of methane emissions from digested sludge.
In: Water Science and Technology, 73 (7), pp. 1599-1607. IWA Publishing, ISSN 0273-1223,
DOI: 10.2166/wst.2015.644,
[Article]
Abstract
The energetic use of sewage sludge is an important step in the generation of electricity and heat within a wastewater treatment plant (WWTP). For a holistic approach, methane emissions derived from anaerobic treatment have to be considered. Measurements show that methane dissolved in digested sludge can be analyzed via the vacuum salting out degassing method. At different WWTPs, dissolved methane was measured, showing a concentration range of approximately 7–37 mg CH4/L. The average concentration of dissolved methane in mesophilic digested sludge was approximately 29 mg CH4/L, which corresponds to an estimated yearly specific load of approximately 14–21 g CH4 per population equivalent. Comparisons between continuous and discontinuous digester feeding show that a temporary rise in the volume load causes increased concentrations of dissolved methane. Investigations using an industrial-scale digestion plant, consisting of three digestion tank operated in series, show comparable results.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Schaum, Christian ; Fundneider, Thomas ; Cornel, Peter |
| Title: | Analysis of methane emissions from digested sludge |
| Language: | English |
| Abstract: | The energetic use of sewage sludge is an important step in the generation of electricity and heat within a wastewater treatment plant (WWTP). For a holistic approach, methane emissions derived from anaerobic treatment have to be considered. Measurements show that methane dissolved in digested sludge can be analyzed via the vacuum salting out degassing method. At different WWTPs, dissolved methane was measured, showing a concentration range of approximately 7–37 mg CH4/L. The average concentration of dissolved methane in mesophilic digested sludge was approximately 29 mg CH4/L, which corresponds to an estimated yearly specific load of approximately 14–21 g CH4 per population equivalent. Comparisons between continuous and discontinuous digester feeding show that a temporary rise in the volume load causes increased concentrations of dissolved methane. Investigations using an industrial-scale digestion plant, consisting of three digestion tank operated in series, show comparable results. |
| Journal or Publication Title: | Water Science and Technology |
| Journal volume: | 73 |
| Number: | 7 |
| Publisher: | IWA Publishing |
| Divisions: | 13 Department of Civil and Environmental Engineering Sciences 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Technology 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Engineering |
| Date Deposited: | 06 Sep 2017 14:13 |
| DOI: | 10.2166/wst.2015.644 |
| Official URL: | http://wst.iwaponline.com/content/73/7/1599 |
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