Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems

Biogas, a green and sustainable form of energy produced during the degradation of organic waste anaerobically comes with ecological and economic paybacks when compared to a comprehensive fossil fuel-based energy system. However, the biodiversity of microorganisms and chemical loads for enzymatic and...

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Autores principales:	E. Kweinor Tetteh, S. Rathilal
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Anaerobic digestion Biogas Biomagnetic Catalyst Magnetite Wastewater treatment River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500 Energy industries. Energy policy. Fuel trade HD9502-9502.5
Acceso en línea:	https://doaj.org/article/5e38301eceb147f8a294493039045318
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spelling	oai:doaj.org-article:5e38301eceb147f8a2944930390453182021-11-30T04:16:49ZBiogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems2588-912510.1016/j.wen.2021.11.004https://doaj.org/article/5e38301eceb147f8a2944930390453182021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2588912521000266https://doaj.org/toc/2588-9125Biogas, a green and sustainable form of energy produced during the degradation of organic waste anaerobically comes with ecological and economic paybacks when compared to a comprehensive fossil fuel-based energy system. However, the biodiversity of microorganisms and chemical loads for enzymatic and bioconversion reactions impedes the anaerobic digester’s (AD) practicality for commercialization. Hence, this study examined the application of titanium dioxide magnetite (Fe-TiO2) (F) via a synthetic route in AD + F and a biomagnetic system (BMs) as a collective pathway to maximize methane potentials, wastewater treatment, and improve biogas production. The AD + F and BM systems were operated at a working volume of 0.8 L (inoculum to wastewater ratio of 0.6), the mesophilic temperature of 35 °C for an incubation period of 30 days. The results showed in-situ Fe-TiO2 facilitated the bio-electrolysis and bio-methanation reactions in the AD process which improved its performance as compared to the control (AD only). Above 75% of chemical oxygen demand (1600 ± 16.2 mg/L), Total Kjeldahl Nitrogen (76 ± 6.4 mg/L), total solids (135 ± 12 mg VS/L), volatile solids (94 ± 6.8 mg VS/L), and other inorganic contaminants (28 elementals) contained in the wastewater were removed by the BMs at a pH of 6.5 followed by the AD + F (65–75%) and the AD only (50–65%). On the 20th day, the control system (AD only) had a maximum daily biogas yield of 50 mL/COD.d, whereas the AD + F gave 90 mL/d and BMs 120 mL/d. Compared to the control with a methane yield of 66%, the addition of the Fe-TiO2 to AD + F and BMs increased the methane yield to 100%. Synergistically, the catalytic and biomagnetic activity of Fe-TiO2 in the BMs heightened the adsorption and reaction pathway of the contaminant’s transformations and degradation. Amidst two kinetic models investigated, the cumulative biogas yield followed the Gompertz kinetic model. In conclusion, combining the magnetic effect with green magnetic catalyst (Fe-TiO2) in AD and adsorption–based wastewater settings have viable prospects towards environmental purification.E. Kweinor TettehS. RathilalKeAi Communications Co., Ltd.articleAnaerobic digestionBiogasBiomagneticCatalystMagnetiteWastewater treatmentRiver, lake, and water-supply engineering (General)TC401-506Water supply for domestic and industrial purposesTD201-500Energy industries. Energy policy. Fuel tradeHD9502-9502.5ENWater-Energy Nexus, Vol 4, Iss , Pp 165-173 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Anaerobic digestion Biogas Biomagnetic Catalyst Magnetite Wastewater treatment River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500 Energy industries. Energy policy. Fuel trade HD9502-9502.5
spellingShingle	Anaerobic digestion Biogas Biomagnetic Catalyst Magnetite Wastewater treatment River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500 Energy industries. Energy policy. Fuel trade HD9502-9502.5 E. Kweinor Tetteh S. Rathilal Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
description	Biogas, a green and sustainable form of energy produced during the degradation of organic waste anaerobically comes with ecological and economic paybacks when compared to a comprehensive fossil fuel-based energy system. However, the biodiversity of microorganisms and chemical loads for enzymatic and bioconversion reactions impedes the anaerobic digester’s (AD) practicality for commercialization. Hence, this study examined the application of titanium dioxide magnetite (Fe-TiO2) (F) via a synthetic route in AD + F and a biomagnetic system (BMs) as a collective pathway to maximize methane potentials, wastewater treatment, and improve biogas production. The AD + F and BM systems were operated at a working volume of 0.8 L (inoculum to wastewater ratio of 0.6), the mesophilic temperature of 35 °C for an incubation period of 30 days. The results showed in-situ Fe-TiO2 facilitated the bio-electrolysis and bio-methanation reactions in the AD process which improved its performance as compared to the control (AD only). Above 75% of chemical oxygen demand (1600 ± 16.2 mg/L), Total Kjeldahl Nitrogen (76 ± 6.4 mg/L), total solids (135 ± 12 mg VS/L), volatile solids (94 ± 6.8 mg VS/L), and other inorganic contaminants (28 elementals) contained in the wastewater were removed by the BMs at a pH of 6.5 followed by the AD + F (65–75%) and the AD only (50–65%). On the 20th day, the control system (AD only) had a maximum daily biogas yield of 50 mL/COD.d, whereas the AD + F gave 90 mL/d and BMs 120 mL/d. Compared to the control with a methane yield of 66%, the addition of the Fe-TiO2 to AD + F and BMs increased the methane yield to 100%. Synergistically, the catalytic and biomagnetic activity of Fe-TiO2 in the BMs heightened the adsorption and reaction pathway of the contaminant’s transformations and degradation. Amidst two kinetic models investigated, the cumulative biogas yield followed the Gompertz kinetic model. In conclusion, combining the magnetic effect with green magnetic catalyst (Fe-TiO2) in AD and adsorption–based wastewater settings have viable prospects towards environmental purification.
format	article
author	E. Kweinor Tetteh S. Rathilal
author_facet	E. Kweinor Tetteh S. Rathilal
author_sort	E. Kweinor Tetteh
title	Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
title_short	Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
title_full	Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
title_fullStr	Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
title_full_unstemmed	Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
title_sort	biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/5e38301eceb147f8a294493039045318
work_keys_str_mv	AT ekweinortetteh biogasproductionfromwastewatertreatmentevaluatinganaerobicandbiomagneticsystems AT srathilal biogasproductionfromwastewatertreatmentevaluatinganaerobicandbiomagneticsystems
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Biogas production from wastewater treatment-evaluating anaerobic and biomagnetic systems

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