Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production
Digestate is characterized by high water content, and in the water and wastewater treatment settings, necessitates both large storage capacities and a high cost of disposal. By seeding digestate with four magnetic nanoparticles (MNPs), this study aimed to recover biogas and boost its methane potenti...
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2021
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oai:doaj.org-article:0d29d4b9009c4bc794365ee70f57c19c2021-11-11T18:26:58ZSynergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production10.3390/molecules262164341420-3049https://doaj.org/article/0d29d4b9009c4bc794365ee70f57c19c2021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6434https://doaj.org/toc/1420-3049Digestate is characterized by high water content, and in the water and wastewater treatment settings, necessitates both large storage capacities and a high cost of disposal. By seeding digestate with four magnetic nanoparticles (MNPs), this study aimed to recover biogas and boost its methane potential anaerobically. This was carried out via biochemical methane potential (BMP) tests with five 1 L bioreactors, with a working volume of 80% and 20% head space. These were operated under anaerobic conditions at a temperature 40 °C for a 30 d incubation period. The SEM/EDX results revealed that the morphological surface area of the digestate with the MNPs increased as compared to its raw state. Comparatively, the degree of degradation of the bioreactors with MNPs resulted in over 75% decontamination (COD, color, and turbidity) as compared to the control system result of 60% without MNPs. The highest biogas production (400 mL/day) and methane yield (100% CH<sub>4</sub>) was attained with 2 g of Fe<sub>2</sub>O<sub>4</sub>-TiO<sub>2</sub> MNPs as compared to the control biogas production (350 mL/day) and methane yield (65% CH<sub>4</sub>). Economically, the highest energy balance achieved was estimated as 320.49 ZAR/kWh, or 22.89 USD/kWh in annual energy savings for this same system. These findings demonstrate that digestate seeded with MNPs has great potential to improve decontamination efficiency, biogas production and circular economy in wastewater management.Emmanuel Kweinor TettehGloria Amo-DuoduSudesh RathilalMDPI AGarticleanaerobic digestionbiogasdigestatemagnetiterenewable energywastewaterOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6434, p 6434 (2021) |
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EN |
| topic |
anaerobic digestion biogas digestate magnetite renewable energy wastewater Organic chemistry QD241-441 |
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anaerobic digestion biogas digestate magnetite renewable energy wastewater Organic chemistry QD241-441 Emmanuel Kweinor Tetteh Gloria Amo-Duodu Sudesh Rathilal Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| description |
Digestate is characterized by high water content, and in the water and wastewater treatment settings, necessitates both large storage capacities and a high cost of disposal. By seeding digestate with four magnetic nanoparticles (MNPs), this study aimed to recover biogas and boost its methane potential anaerobically. This was carried out via biochemical methane potential (BMP) tests with five 1 L bioreactors, with a working volume of 80% and 20% head space. These were operated under anaerobic conditions at a temperature 40 °C for a 30 d incubation period. The SEM/EDX results revealed that the morphological surface area of the digestate with the MNPs increased as compared to its raw state. Comparatively, the degree of degradation of the bioreactors with MNPs resulted in over 75% decontamination (COD, color, and turbidity) as compared to the control system result of 60% without MNPs. The highest biogas production (400 mL/day) and methane yield (100% CH<sub>4</sub>) was attained with 2 g of Fe<sub>2</sub>O<sub>4</sub>-TiO<sub>2</sub> MNPs as compared to the control biogas production (350 mL/day) and methane yield (65% CH<sub>4</sub>). Economically, the highest energy balance achieved was estimated as 320.49 ZAR/kWh, or 22.89 USD/kWh in annual energy savings for this same system. These findings demonstrate that digestate seeded with MNPs has great potential to improve decontamination efficiency, biogas production and circular economy in wastewater management. |
| format |
article |
| author |
Emmanuel Kweinor Tetteh Gloria Amo-Duodu Sudesh Rathilal |
| author_facet |
Emmanuel Kweinor Tetteh Gloria Amo-Duodu Sudesh Rathilal |
| author_sort |
Emmanuel Kweinor Tetteh |
| title |
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| title_short |
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| title_full |
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| title_fullStr |
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| title_full_unstemmed |
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production |
| title_sort |
synergistic effects of magnetic nanomaterials on post-digestate for biogas production |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/0d29d4b9009c4bc794365ee70f57c19c |
| work_keys_str_mv |
AT emmanuelkweinortetteh synergisticeffectsofmagneticnanomaterialsonpostdigestateforbiogasproduction AT gloriaamoduodu synergisticeffectsofmagneticnanomaterialsonpostdigestateforbiogasproduction AT sudeshrathilal synergisticeffectsofmagneticnanomaterialsonpostdigestateforbiogasproduction |
| _version_ |
1718431804949528576 |