Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology
Lab-scale stirrer bubble and lab-scale stepped continuous flow capillary columns were developed to neutralize lime precipitation treated slaughterhouse wastewater (SWW) and recover the volatilized ammonia, using atmospheric CO2. These experiments were carried out using central composite design based...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of CO2 Utilization |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982024000404 |
| _version_ | 1797235535155036160 |
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| author | Luís Madeira Margarida Ribau Teixeira Fátima Carvalho |
| author_facet | Luís Madeira Margarida Ribau Teixeira Fátima Carvalho |
| author_sort | Luís Madeira |
| collection | DOAJ |
| description | Lab-scale stirrer bubble and lab-scale stepped continuous flow capillary columns were developed to neutralize lime precipitation treated slaughterhouse wastewater (SWW) and recover the volatilized ammonia, using atmospheric CO2. These experiments were carried out using central composite design based on the response surface methodology. The carbonation process occurred in both processes. For the bubbling process, numerical optimization indicated a final pH of 8 with calcium and ammonium nitrogen removals of 76.0 and 66.2%, respectively, applying 21 h, air flow rate at 65 L h−1, the stirring speed at 52 rpm, and SWW volume at 178 mL. It was also observed that increasing the air flow rate can avoid the stirring step. For the capillary process, a pH of 8.2 and calcium and ammonium nitrogen removals of 81.0 and 57.5% were achieved, applying a SWW flow rate at 1.2 mL min−1, air flow rate at 90 L h−1, and capillary area at 700 cm2. Under optimal conditions, the flow capillary column was able to neutralize different SWW volumes, 178–478 mL, without significant differences in the collected samples, with the operation time varying between 4.48 and 10.20 h, respectively. |
| first_indexed | 2024-03-07T23:23:44Z |
| format | Article |
| id | doaj.art-57f07d469eca42c99e4d1b5ec393cdc6 |
| institution | Directory Open Access Journal |
| issn | 2212-9839 |
| language | English |
| last_indexed | 2024-04-24T16:49:30Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj.art-57f07d469eca42c99e4d1b5ec393cdc62024-03-29T05:50:05ZengElsevierJournal of CO2 Utilization2212-98392024-03-0181102705Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodologyLuís Madeira0Margarida Ribau Teixeira1Fátima Carvalho2Faculdade de Ciências e Tecnologia, Universidade do Algarve, Edifício 7, Campus de Gambelas, Faro 8005-139, Portugal; Departamento de Tecnologias e Ciências Aplicadas, IPBeja, Ap. 158, Beja 7801-902, Portugal; CENSE, Center for Environmental and Sustainability Research, Portugal & CHANGE, Global Change and Sustainability Institute, PortugalFaculdade de Ciências e Tecnologia, Universidade do Algarve, Edifício 7, Campus de Gambelas, Faro 8005-139, Portugal; CENSE, Center for Environmental and Sustainability Research, Portugal & CHANGE, Global Change and Sustainability Institute, Portugal; Corresponding author at: Faculdade de Ciências e Tecnologia, Universidade do Algarve, Edifício 7, Campus de Gambelas, Faro 8005-139, Portugal.Departamento de Tecnologias e Ciências Aplicadas, IPBeja, Ap. 158, Beja 7801-902, Portugal; CENSE, Center for Environmental and Sustainability Research, Portugal & CHANGE, Global Change and Sustainability Institute, Portugal; FiberEnTech, Fiber Materials and Environmental Technologies, Universidade de Beira Interior, Covilhã, PortugalLab-scale stirrer bubble and lab-scale stepped continuous flow capillary columns were developed to neutralize lime precipitation treated slaughterhouse wastewater (SWW) and recover the volatilized ammonia, using atmospheric CO2. These experiments were carried out using central composite design based on the response surface methodology. The carbonation process occurred in both processes. For the bubbling process, numerical optimization indicated a final pH of 8 with calcium and ammonium nitrogen removals of 76.0 and 66.2%, respectively, applying 21 h, air flow rate at 65 L h−1, the stirring speed at 52 rpm, and SWW volume at 178 mL. It was also observed that increasing the air flow rate can avoid the stirring step. For the capillary process, a pH of 8.2 and calcium and ammonium nitrogen removals of 81.0 and 57.5% were achieved, applying a SWW flow rate at 1.2 mL min−1, air flow rate at 90 L h−1, and capillary area at 700 cm2. Under optimal conditions, the flow capillary column was able to neutralize different SWW volumes, 178–478 mL, without significant differences in the collected samples, with the operation time varying between 4.48 and 10.20 h, respectively.http://www.sciencedirect.com/science/article/pii/S2212982024000404Atmospheric CO2 captureAlkaline wastewaterCapillary actionStirrer bubble columnSlaughterhouse |
| spellingShingle | Luís Madeira Margarida Ribau Teixeira Fátima Carvalho Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology Journal of CO2 Utilization Atmospheric CO2 capture Alkaline wastewater Capillary action Stirrer bubble column Slaughterhouse |
| title | Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| title_full | Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| title_fullStr | Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| title_full_unstemmed | Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| title_short | Modeling and optimization of atmospheric CO2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| title_sort | modeling and optimization of atmospheric co2 capture for neutralization of high alkaline wastewaters using response surface methodology |
| topic | Atmospheric CO2 capture Alkaline wastewater Capillary action Stirrer bubble column Slaughterhouse |
| url | http://www.sciencedirect.com/science/article/pii/S2212982024000404 |
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