Environment and Material Science Technology for Anaerobic Digestion-Based Circular Bioeconomy

Rojo, Elena M.; Carmona, Alessandro; Soto, Cenit; Díaz, Israel; Fernández-Polanco, María; Palacio, Laura; Muñoz, Raúl; Bolado, Silvia

doi:10.1016/b978-0-12-821878-5.00024-6

Cited by 6 publications

(8 citation statements)

References 80 publications

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“…The FAO (2021) reported that 1.25 billion tons of food waste were used as animal feed. Other applications for food by-products include composting and energy valorization through anaerobic digestion for biogas production (Rojo et al, 2021) or direct combustion (Prasad et al, 2020). Cherubin et al (2018) estimated that European food and crop residues could produce up to 12,528 MBTU (Mega British Unit) of energy.…”

Section: Tablementioning

confidence: 99%

Optimizing the environmental sustainability of alternative post-harvest scenarios for fresh vegetables: A case study in Spain

Rasines

Miguel

Molina‐García³

et al. 2023

Science of The Total Environment

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Section: Tablementioning

confidence: 99%

Optimizing the environmental sustainability of alternative post-harvest scenarios for fresh vegetables: A case study in Spain

Rasines

Miguel

Molina‐García³

et al. 2023

Science of The Total Environment

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“…Single-stage configurations without gas recycling are the most common and simplest design. However, the demand for higher product purity (for instance methane contents of 98-99.5% in biomethane) and the need for recovery target products makes the use of recycle streams as well as multi-stage configurations a must [199]. These multi-stage systems are typically designed using two, three or four stages [200].…”

Section: Module Selection Criteriamentioning

confidence: 99%

Recent Advances in Membrane-Based Biogas and Biohydrogen Upgrading

et al. 2022

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Biogas and biohydrogen, due to their renewable nature and zero carbon footprint, are considered two of the gaseous biofuels that will replace conventional fossil fuels. Biogas from anaerobic digestion must be purified and converted into high-quality biomethane prior to use as a vehicle fuel or injection into natural gas networks. Likewise, the enrichment of biohydrogen from dark fermentation requires the removal of CO2, which is the main pollutant of this new gaseous biofuel. Currently, the removal of CO2 from both biogas and biohydrogen is carried out by means of physical/chemical technologies, which exhibit high operating costs and corrosion problems. Biological technologies for CO2 removal from biogas, such as photosynthetic enrichment and hydrogenotrophic enrichment, are still in an experimental development phase. In this context, membrane separation has emerged as the only physical/chemical technology with the potential to improve the performance of CO2 separation from both biogas and biohydrogen, and to reduce investment and operating costs, as a result of the recent advances in the field of nanotechnology and materials science. This review will focus on the fundamentals, potential and limitations of CO2 and H2 membrane separation technologies. The latest advances on membrane materials for biogas and biohydrogen purification will be systematically reviewed.

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“…Moreover, variations in the AD process feedstock and environmental conditions can result in high complex sludge that is difficult to treat economically and environmentally [9,12,19]. On this basis, our previous work [17,20,21] and other researched studies [9,12,18,19,[22][23][24] show that using a photocatalyst (Fe-TiO 2 ) with magnetic properties has tremendous potential in wastewater settings. With this, and the need to meet future water demands, creating a cost-effective, user-friendly and reliable technology with a significant impact on energy production and recuperation in water settings is urgently needed [3,5,15,16].…”

Section: Introductionmentioning

confidence: 95%

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

Tetteh

Rathilal

2022

Catalysts

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This study presents the bio-photocatalytic upgrading of biogas utilising carbon dioxide (CO2) as a potential option for beginning fossil fuel depletion and the associated environmental risks in the pursuit of sustainable development. Herein, magnetite photocatalyst (Fe-TiO2) was employed with an integrated anaerobic-photomagnetic system for the decontamination of municipality wastewater for biogas production. The Fe-TiO2 photocatalyst used, manufactured via a co-precipitation technique, had a specific surface area of 62.73 m2/g, micropore volume of 0.017 cm3/g and pore size of 1.337 nm. The results showed that using the ultraviolet-visible (UV-Vis) photomagnetic system as a post-treatment to the anaerobic digestion (AD) process was very effective with over 85% reduction in colour, chemical oxygen demand (COD) and turbidity. With an organic loading rate (OLR) of 0.394 kg COD/L·d and hydraulic retention time (HTR) of 21 days, a 92% degradation of the organic content (1.64 kgCOD/L) was attained. This maximised the bioenergy production to 5.52 kWh/m3 with over 10% excess energy to offset the energy demand of the UV-Vis lamp. Assuming 33% of the bioenergy produced was used as electricity to power the UV-Vis lamp, the CO2 emission reduction was 1.74 kg CO2 e/m3, with good potential for environmental conservation.

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Environment and Material Science Technology for Anaerobic Digestion-Based Circular Bioeconomy

Cited by 6 publications

References 80 publications

Optimizing the environmental sustainability of alternative post-harvest scenarios for fresh vegetables: A case study in Spain

Optimizing the environmental sustainability of alternative post-harvest scenarios for fresh vegetables: A case study in Spain

Recent Advances in Membrane-Based Biogas and Biohydrogen Upgrading

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

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