Sustainable biogas production via anaerobic digestion with focus on CSTR technology: A review

Shah, Sonal Vilas; Yadav Lamba, Bhawna; Tiwari, Avanish K.; Chen, Wei-Hsin

doi:10.1016/j.jtice.2024.105575

Journal of the Taiwan Institute of Chemical Engineers

2024

DOI: 10.1016/j.jtice.2024.105575

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Sustainable biogas production via anaerobic digestion with focus on CSTR technology: A review

Sonal Vilas Shah,

Bhawna Yadav Lamba,

Avanish K. Tiwari

et al.

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2024

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Cited by 3 publications

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A metagenomic approach to demystify the anaerobic digestion black box and achieve higher biogas yield: a review

Ostos,

Flórez-Pardo,

Camargo

2024

Front. Microbiol.

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The increasing reliance on fossil fuels and the growing accumulation of organic waste necessitates the exploration of sustainable energy alternatives. Anaerobic digestion (AD) presents one such solution by utilizing secondary biomass to produce biogas while reducing greenhouse gas emissions. Given the crucial role of microbial activity in anaerobic digestion, a deeper understanding of the microbial community is essential for optimizing biogas production. While metagenomics has emerged as a valuable tool for unravelling microbial composition and providing insights into the functional potential in biodigestion, it falls short of interpreting the functional and metabolic interactions, limiting a comprehensive understanding of individual roles in the community. This emphasizes the significance of expanding the scope of metagenomics through innovative tools that highlight the often-overlooked, yet crucial, role of microbiota in biomass digestion. These tools can more accurately elucidate microbial ecological fitness, shared metabolic pathways, and interspecies interactions. By addressing current limitations and integrating metagenomics with other omics approaches, more accurate predictive techniques can be developed, facilitating informed decision-making to optimize AD processes and enhance biogas yields, thereby contributing to a more sustainable future.

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A metagenomic approach to demystify the anaerobic digestion black box and achieve higher biogas yield: a review

Ostos,

Flórez-Pardo,

Camargo

2024

Front. Microbiol.

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Economic Feasibility of Biogas Microgeneration from Food Waste: Potential for Sustainable Energy in Northeastern Brazil

Roa,

Henriquez,

Dutra

et al. 2024

Sustainability

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This study evaluates three scenarios’ technical and economic viability for implementing a microgeneration power plant using biogas derived from the anaerobic digestion of food waste. The case study focuses on the Federal University of Pernambuco (UFPE) campus in Recife, northeastern (NE) Brazil, targeting the organic fraction of solid waste from food units (restaurants, canteens, and kiosks). The analysis was based on field data, the chemical composition of the waste, and the electric energy consumption. Biogas production of 166 m3/day from 1 ton/day of food waste was estimated using an anaerobic reactor of 126 m3. This amount of biogas could generate about 360 kWh/day of electricity if the plant operates at peak hours using a generator set with an alternative internal combustion engine of 120 kW, with a consumption of 66 m3/h and fuel efficiency of 30%. The system could generate 390 kWh/day of electrical energy using a microturbine, with a consumption of 78 m3/h and 30% efficiency. The scenario utilizing a tubular reactor and an internal combustion engine demonstrated the best economic viability. While this study focuses on financial aspects, the findings suggest significant potential contributions to sustainability, including reducing greenhouse gas (GHG) emissions and advancing renewable energy solutions. This model can be adapted for small NE Brazil municipalities, offering economic and environmental benefits.

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Impact of Design and Mixing Strategies on Biogas Production in Anaerobic Digesters

Neuner,

Meister,

Pillei

et al. 2024

Water

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Anaerobic digestion (AD) is a biological process that breaks down organic matter in the absence of oxygen, producing biogas and nutrient-rich digestate. Various reactor designs and mixing strategies are well-established in AD processes, each with their own advantages and benefits. The presented study summarizes and investigates the state of the art of AD in domestic wastewater treatment plants (WWTPs) in an Austrian alpine region, with a primary focus on finding similarities among the most efficient plants regarding digester design, mixing approaches, and biogas production. By combining surveys and detailed field studies in cooperation with 34 WWTPs, the study provides a comprehensive overview of common AD practices, reactor shapes, and inherent mixing methods, highlighting their potential regarding energetic efficiency and biogas production. The results of the survey reveal qualitative trends in efficient AD design alongside detailed quantitative data derived from the supervised in-field optimization studies. Notably, one of the studies demonstrated energetic savings of 52% with no decrease in biogas production, achieved by transitioning from gas injection to mechanical agitation. Redundant impeller-based overmixing was also practically investigated and demonstrated in another field study. After optimization, the adaptations also resulted in energy savings of 30%, still proving sufficient substrate mixing with biomethane potential analysis. In conclusion, this research emphasizes the economic and environmental importance of energy-refined practices and optimized processes while highlighting the sustainability of AD, particularly for large domestic WWTPs but also for different comparable applications.

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Sustainable biogas production via anaerobic digestion with focus on CSTR technology: A review

Cited by 3 publications

References 133 publications

A metagenomic approach to demystify the anaerobic digestion black box and achieve higher biogas yield: a review

A metagenomic approach to demystify the anaerobic digestion black box and achieve higher biogas yield: a review

Economic Feasibility of Biogas Microgeneration from Food Waste: Potential for Sustainable Energy in Northeastern Brazil

Impact of Design and Mixing Strategies on Biogas Production in Anaerobic Digesters

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