Düppenbecker, Bernhard and Cornel, Peter (2016):
Anaerobic treatment of sulfate-containing municipal wastewater with a fluidized bed reactor at 20 °C.
In: Water Science and Technology, 73 (10), pp. 2446-2452. IWA Publishing, ISSN 0273-1223,
DOI: 10.2166/wst.2016.109,
[Article]
Abstract
This study focuses on the anaerobic treatment of sulfate-containing municipal wastewater at 20 °C with a fluidized bed reactor. Mean influent chemical oxygen demand (COD) and sulfate concentrations were 481 and 96 mg/l. The response of the COD removal efficiency to increasing organic loading rates (OLR) was investigated. Average total COD removal was 61% at OLR between 2.7 and 13.7 kg COD/(m³·d) and did not distinctly depend on the OLR. To assess the removal efficiency in more detail the COD in- and output mass flows were balanced. The results showed that only 11–12% of the input COD was recovered as gaseous methane. About 12–13% of the input COD remained in the effluent as dissolved methane. Furthermore, a distinct amount of 12–19% of the input COD remained in the reactor as settled sludge and was not further biologically degraded. Due to the reduction by sulfate-reducing bacteria, 13–14% of the input COD was degraded. Further adverse impacts of the influent sulfate on the anaerobic treatment process are discussed as well.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Düppenbecker, Bernhard and Cornel, Peter |
| Title: | Anaerobic treatment of sulfate-containing municipal wastewater with a fluidized bed reactor at 20 °C |
| Language: | English |
| Abstract: | This study focuses on the anaerobic treatment of sulfate-containing municipal wastewater at 20 °C with a fluidized bed reactor. Mean influent chemical oxygen demand (COD) and sulfate concentrations were 481 and 96 mg/l. The response of the COD removal efficiency to increasing organic loading rates (OLR) was investigated. Average total COD removal was 61% at OLR between 2.7 and 13.7 kg COD/(m³·d) and did not distinctly depend on the OLR. To assess the removal efficiency in more detail the COD in- and output mass flows were balanced. The results showed that only 11–12% of the input COD was recovered as gaseous methane. About 12–13% of the input COD remained in the effluent as dissolved methane. Furthermore, a distinct amount of 12–19% of the input COD remained in the reactor as settled sludge and was not further biologically degraded. Due to the reduction by sulfate-reducing bacteria, 13–14% of the input COD was degraded. Further adverse impacts of the influent sulfate on the anaerobic treatment process are discussed as well. |
| Journal or Publication Title: | Water Science and Technology |
| Journal volume: | 73 |
| Number: | 10 |
| 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 |
| Date Deposited: | 06 Sep 2017 14:08 |
| DOI: | 10.2166/wst.2016.109 |
| Official URL: | http://wst.iwaponline.com/content/73/10/2446 |
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