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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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Autores principales: Tetteh, Emmanuel Kweinor, Amo-Duodu, Gloria, Rathilal, Sudesh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8588561/
https://www.ncbi.nlm.nih.gov/pubmed/34770843
http://dx.doi.org/10.3390/molecules26216434
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author Tetteh, Emmanuel Kweinor
Amo-Duodu, Gloria
Rathilal, Sudesh
author_facet Tetteh, Emmanuel Kweinor
Amo-Duodu, Gloria
Rathilal, Sudesh
author_sort Tetteh, Emmanuel Kweinor
collection PubMed
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(4)) was attained with 2 g of Fe(2)O(4)-TiO(2) MNPs as compared to the control biogas production (350 mL/day) and methane yield (65% CH(4)). 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.
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spelling pubmed-85885612021-11-13 Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production Tetteh, Emmanuel Kweinor Amo-Duodu, Gloria Rathilal, Sudesh Molecules Article 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(4)) was attained with 2 g of Fe(2)O(4)-TiO(2) MNPs as compared to the control biogas production (350 mL/day) and methane yield (65% CH(4)). 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. MDPI 2021-10-25 /pmc/articles/PMC8588561/ /pubmed/34770843 http://dx.doi.org/10.3390/molecules26216434 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tetteh, Emmanuel Kweinor
Amo-Duodu, Gloria
Rathilal, Sudesh
Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production
title 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_short Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production
title_sort synergistic effects of magnetic nanomaterials on post-digestate for biogas production
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8588561/
https://www.ncbi.nlm.nih.gov/pubmed/34770843
http://dx.doi.org/10.3390/molecules26216434
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