Acidogenesis of food wastes at variable inlet and operational conditions

Campuzano, Rosalinda; Trejo-Aguilar, Gloria; Cuetero-Martínez, Yovany; Ramírez-Vives, Florina; Monroy, O.

doi:10.1016/j.eti.2021.102162

Environmental Technology & Innovation

2022

DOI: 10.1016/j.eti.2021.102162

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Acidogenesis of food wastes at variable inlet and operational conditions

Rosalinda Campuzano

Gloria Trejo-Aguilar

Yovany Cuetero-Martínez

et al.

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Cited by 9 publications

(1 citation statement)

References 28 publications

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“…Acidogenesis: Acidogenic microorganisms convert hydrolytic products into volatile fatty acids (VFAs), such as acetic acid, propionic acid, butyric acid, ethanol, and lactate. Lower pH conditions favor VFA production [73].…”

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confidence: 99%

Agricultural Waste Valorization: Exploring Environmentally Friendly Approaches to Bioenergy Conversion

Ufitikirezi,

Filip,

Ghorbani

et al. 2024

Sustainability

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The pursuit of sustainable energy production through the conversion of agricultural waste into different bioenergy resources is of paramount importance given its potential to mitigate environmental impact while meeting energy demands. In this review, a comprehensive overview of the technologies for the biochemical and thermochemical conversion of agricultural waste into bioenergy is provided. A summary of the process of its conversion into different bioenergy products such as biogas, bio-oil, and biofuel is provided, in addition to the potential advantages and challenges faced using different biomass conversion technologies. The review highlights the potential of agricultural waste valorization to address the current energy demand while at the same time contributing to environmental benefits and greenhouse gas emission reductions. Moreover, this review highlights some significant gaps for improvement. These include the challenges in the pretreatment of agricultural waste biomass in optimizing the conversion rates and lowering the required energy consumption throughout the process while enhancing both the quantity and quality of the output. Some recommendations are proposed to address the identified challenges. These include the need for further studies for a thorough assessment to evaluate the efficacity and sustainability of agricultural waste valorization technologies. Assessment methods such as life cycle assessment (LCA), life cycle analysis (LCA), net energy ratio (NER) calculations, life cycle costing (LCC), as well as techno-economic assessment (TEA), are recommended, together with collaboration among governments, farmers, and researchers, as well as the integration of cutting-edge technologies to enhance various aspects of agricultural waste, optimizing the conversion process, cost efficiency, time management, and labor requirements, consequently boosting the conversion efficiency and product quality.

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mentioning

confidence: 99%

Agricultural Waste Valorization: Exploring Environmentally Friendly Approaches to Bioenergy Conversion

Ufitikirezi,

Filip,

Ghorbani

et al. 2024

Sustainability

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Organic Leachate and Biogas Utilization in Outdoor Microalgae Cultivation Under Alkaline Conditions at Pilot-Scale

Velasco

Franco‐Morgado

Saldivar

et al. 2023

Waste Biomass Valor

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The performance of an outdoor pilot-scale system consisting of a high rate algal pond interconnected to an absorption bubble column and seeded with a microalgal-bacterial consortium is presented. Biogas and organic leachate (from food waste anaerobic hydrolysis) were used as sources of CO2 and nutrients for the consortium, respectively. The removal efficiencies for CO2 and H2S from biogas were 80.0% and 99.9%, respectively, provoking a methane content in the utilized biogas of approximately 55 vol% for anaerobically-produced biogas and 90 vol% for a prepared gaseous mixture. The molecular oxygen produced by microalgae photosynthesis induced undesirable cumulation of O2 in utilized biogas up to 5%vol. The organic leachate was diluted in an alkaline mineral medium (15:1 v/v), and this rich-nutrient mixture was fed to the system at a hydraulic retention time of 138 d. The biomass productivity applying organic leachate and anaerobically-produced biogas was 2.6 g m−3 d−1, nine times lower than biomass productivity achieved when only mineral salt medium was fed, suggesting the existence of limited nutrient bioavailability. Microalgal-bacterial community shifts evaluated through molecular and morphological methods showed that a robust and stable photosynthetic population was maintained throughout the entire operation of the system, formed mainly by Picochlorum sp., Pseudanabaena sp., Spirulina sp., and Nitzschia sp., as well as heterotrophic bacteria and some microalgae predators. The valued by-products after waste utilization were clean and highly calorific biogas besides microalgae biomass, where the commercialization of the latter would determine the economic viability of biogas and leachate utilization. Graphical Abstract

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Bioprocessing of low-value food waste to high value volatile fatty acids for applications in energy and materials: A review on process-flow

Moza

Ram

Srivastava

et al. 2022

Bioresource Technology Reports

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Acidogenesis of food wastes at variable inlet and operational conditions

Cited by 9 publications

References 28 publications

Agricultural Waste Valorization: Exploring Environmentally Friendly Approaches to Bioenergy Conversion

Agricultural Waste Valorization: Exploring Environmentally Friendly Approaches to Bioenergy Conversion

Organic Leachate and Biogas Utilization in Outdoor Microalgae Cultivation Under Alkaline Conditions at Pilot-Scale

Bioprocessing of low-value food waste to high value volatile fatty acids for applications in energy and materials: A review on process-flow

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