Influence of pH and the C/N ratio on the biogas production of wastewater
Wastewater from institutions are considered with low strength and they may have a low C/N ratio and pH values higher than 7.0 units. In developing countries, anaerobic treatment for low strength wastewater is widely applied. However, COD removals and biogas production can be low due to inhibitions...
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| Format: | Article |
| Language: | English |
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Universidad de Antioquia
2019-06-01
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| Series: | Revista Facultad de Ingeniería Universidad de Antioquia |
| Subjects: | |
| Online Access: | https://revistas.udea.edu.co/index.php/ingenieria/article/view/337568 |
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| author | A. Cerón-Vivas K. T. Cáceres A. Rincón Á. A. Cajigas |
| author_facet | A. Cerón-Vivas K. T. Cáceres A. Rincón Á. A. Cajigas |
| author_sort | A. Cerón-Vivas |
| collection | DOAJ |
| description |
Wastewater from institutions are considered with low strength and they may have a low C/N ratio and pH values higher than 7.0 units. In developing countries, anaerobic treatment for low strength wastewater is widely applied. However, COD removals and biogas production can be low due to inhibitions in the process. To improve the effluent quality, aerobic posttreatment has been used. The aim of this study was accessing the influence of pH and C/N ratio on methane yield of institutional wastewater, taking into account the aerobic sludge recirculation towards the anaerobic reactor. A factorial design 32 was used, evaluating different pH values: 6.9±0.1, 7.5±0.05 and 9.0±0.5; and C/N ratio: 4.9±0.2, 8.2±0.18 and 14.2±0.17. Biochemical methane (BMP) tests were performed using as inoculum a sludge with the hydrolytic, acidogenic and specific methanogenic activity of 2.79 gCOD/gVSS-d, 2.80 gCOD/gVSS-d and 0.14 gCODCH4/gVSS-d, respectively. Results indicating that with high C/N ratio, the methane yield increased. The maximum BMP was 318 L CH4/kgVSS with pH 7.5 and C/N ratio of 8.2±0.18; however, with the C/N ratio of 14.2±017 a major COD removal and methane production rate were observed.
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| first_indexed | 2024-03-12T23:00:21Z |
| format | Article |
| id | doaj.art-ffad650f18cd4cb3b4fe3a89666b5b87 |
| institution | Directory Open Access Journal |
| issn | 0120-6230 2422-2844 |
| language | English |
| last_indexed | 2024-03-12T23:00:21Z |
| publishDate | 2019-06-01 |
| publisher | Universidad de Antioquia |
| record_format | Article |
| series | Revista Facultad de Ingeniería Universidad de Antioquia |
| spelling | doaj.art-ffad650f18cd4cb3b4fe3a89666b5b872023-07-19T12:29:04ZengUniversidad de AntioquiaRevista Facultad de Ingeniería Universidad de Antioquia0120-62302422-28442019-06-0192Influence of pH and the C/N ratio on the biogas production of wastewaterA. Cerón-Vivas0K. T. Cáceres1A. Rincón2Á. A. Cajigas3Pontifical Xavierian UniversityPontifical Xavierian UniversityPontifical Xavierian UniversityPontifical Xavierian University Wastewater from institutions are considered with low strength and they may have a low C/N ratio and pH values higher than 7.0 units. In developing countries, anaerobic treatment for low strength wastewater is widely applied. However, COD removals and biogas production can be low due to inhibitions in the process. To improve the effluent quality, aerobic posttreatment has been used. The aim of this study was accessing the influence of pH and C/N ratio on methane yield of institutional wastewater, taking into account the aerobic sludge recirculation towards the anaerobic reactor. A factorial design 32 was used, evaluating different pH values: 6.9±0.1, 7.5±0.05 and 9.0±0.5; and C/N ratio: 4.9±0.2, 8.2±0.18 and 14.2±0.17. Biochemical methane (BMP) tests were performed using as inoculum a sludge with the hydrolytic, acidogenic and specific methanogenic activity of 2.79 gCOD/gVSS-d, 2.80 gCOD/gVSS-d and 0.14 gCODCH4/gVSS-d, respectively. Results indicating that with high C/N ratio, the methane yield increased. The maximum BMP was 318 L CH4/kgVSS with pH 7.5 and C/N ratio of 8.2±0.18; however, with the C/N ratio of 14.2±017 a major COD removal and methane production rate were observed. https://revistas.udea.edu.co/index.php/ingenieria/article/view/337568sanitationbiotechnologyorganic matter nutrients |
| spellingShingle | A. Cerón-Vivas K. T. Cáceres A. Rincón Á. A. Cajigas Influence of pH and the C/N ratio on the biogas production of wastewater Revista Facultad de Ingeniería Universidad de Antioquia sanitation biotechnology organic matter nutrients |
| title | Influence of pH and the C/N ratio on the biogas production of wastewater |
| title_full | Influence of pH and the C/N ratio on the biogas production of wastewater |
| title_fullStr | Influence of pH and the C/N ratio on the biogas production of wastewater |
| title_full_unstemmed | Influence of pH and the C/N ratio on the biogas production of wastewater |
| title_short | Influence of pH and the C/N ratio on the biogas production of wastewater |
| title_sort | influence of ph and the c n ratio on the biogas production of wastewater |
| topic | sanitation biotechnology organic matter nutrients |
| url | https://revistas.udea.edu.co/index.php/ingenieria/article/view/337568 |
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