Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent
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 remo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-03-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/85/5/1538 |
| _version_ | 1828410404618895360 |
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| author | C. M. Q. Santos C. Ditchfield G. Tommaso R. Ribeiro |
| author_facet | C. M. Q. Santos C. Ditchfield G. Tommaso R. Ribeiro |
| author_sort | C. M. Q. Santos |
| collection | DOAJ |
| description | 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.; |
| first_indexed | 2024-12-10T12:10:38Z |
| format | Article |
| id | doaj.art-4bd6cf81001e4f38a9656942eecbff97 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-10T12:10:38Z |
| publishDate | 2022-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-4bd6cf81001e4f38a9656942eecbff972022-12-22T01:49:22ZengIWA PublishingWater Science and Technology0273-12231996-97322022-03-018551538154810.2166/wst.2022.028028Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluentC. M. Q. Santos0C. Ditchfield1G. Tommaso2R. Ribeiro3 Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), Block 4-F, 1100 João Dagnone Avenue, Santa Angelina, São Carlos, SP, Brazil Biopolymer Technology Laboratory, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo (USP), Pirassununga, SP, Brazil Environmental Biotechnology Laboratory, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo (USP), Pirassununga, SP, Brazil Environmental Biotechnology Laboratory, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo (USP), Pirassununga, SP, Brazil 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.;http://wst.iwaponline.com/content/85/5/1538degassinggreenhouse gasmethanespray nozzleuasbwastewater |
| spellingShingle | C. M. Q. Santos C. Ditchfield G. Tommaso R. Ribeiro Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent Water Science and Technology degassing greenhouse gas methane spray nozzle uasb wastewater |
| title | Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent |
| title_full | Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent |
| title_fullStr | Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent |
| title_full_unstemmed | Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent |
| title_short | Use of spray nozzles to recover dissolved methane from an Upflow Anaerobic Sludge Blanket (UASB) reactor effluent |
| title_sort | use of spray nozzles to recover dissolved methane from an upflow anaerobic sludge blanket uasb reactor effluent |
| topic | degassing greenhouse gas methane spray nozzle uasb wastewater |
| url | http://wst.iwaponline.com/content/85/5/1538 |
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