Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent
| Autor: | C. M. Q. Santos, C. Ditchfield, G. Tommaso, R. Ribeiro |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Water Science and Technology, Vol 85, Iss 5, Pp 1538-1548 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0273-1223 1996-9732 |
| DOI: | 10.2166/wst.2022.028 |
| Popis: | Methane is a powerful greenhouse gas and a source of energy. Recovering this gas means lower greenhouse gas emission and potential reduction of energetic costs. The lack of full-scale results, the use of different methodologies to detect dissolved methane (d-CH4) and the fact that no process to remove d-CH4 from anaerobic effluents is energetically or economically viable at full-scale urged a different approach to the problem. To avoid methodological interference and facilitate comparison of results the Standard Test Method number D8028-17 published by ASTM International can be used to determine d-CH4. The use of real anaerobic reactor effluent also helps results to be compared. In this study, 80 samples from a full-scale anaerobic reactor showed an average concentration of dissolved methane of 14.9 mg·L−1, meaning an emission of 229 kg of CO2 eq·h−1 and an average of 113.5 kW wasted. Using spray nozzles, an alternative to the methods being researched, the average methane recovery was 11.5 mg·L−1 of CH4, an efficiency of 81.6%, meaning 177 kg of CO2 eq·h−1 emissions avoided and 87.9 kW of recoverable energy. HIGHLIGHTS Use of standard method to detect dissolved methane.; Use of real Upflow Anaerobic Sludge Blanket (UASB) reactor effluent.; Simple alternative method to recover dissolved methane.; High efficiency.; |
| Databáze: | Directory of Open Access Journals |
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