Co-digestion of microalgae with potato processing waste and glycerol: effect of glycerol addition on methane production and the microbial community

Zhang, Yanghanzi; Caldwell, Gary S.; Blythe, PT; Zealand, Andrew M.; Li, Shuo; Edwards, Simon; Jin, Xing; Goodman, Paul S.; Whitworth, Paul; Sallis, Paul J.

doi:10.1039/d0ra07840a

Cited by 6 publications

(5 citation statements)

References 69 publications

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“…Most microalgae species have a low C/N ratio [33], and it is often associated with destabilization and reduced biomethane production in the AD process due to ammonia release and inhibition [110]. As a result, anaerobic digesters that solely process microalgae biomass operate at low organic loading rates (<2 g VS/L.d) to avoid ammonia build-up and subsequent process failure [77].…”

Section: Co-digestionmentioning

confidence: 99%

“…Solé-Bundó et al [113] varied the microalgae to the co-substrate ratio (VS basis) in the AD from 100:0 to 75:25, 50:50, and 25:75, and reported 48, 140, and 223% higher biomethane production, respectively. Microalgae biomass has been successfully digested with other types of organic substrates, including food waste [114], animal manure [115], agro-industrial waste [116,117], glycerol (a by-product of the biodiesel industry) [110], and fat, oil, and grease (FOG) waste [118] to produce 19-500% higher biomethane. Recent studies have suggested pretreating microalgae biomass before co-digestion to achieve better biomethane yields.…”

Section: Co-digestionmentioning

confidence: 99%

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From Microalgae to Bioenergy: Recent Advances in Biochemical Conversion Processes

et al. 2023

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Concerns about rising energy demand, fossil fuel depletion, and global warming have increased interest in developing and utilizing alternate renewable energy sources. Among the available renewable resources, microalgae biomass, a third-generation feedstock, is promising for energy production due to its rich biochemical composition, metabolic elasticity, and ability to produce numerous bioenergy products, including biomethane, biohydrogen, and bioethanol. However, the true potential of microalgae biomass in the future bioenergy economy is yet to be realized. This review provides a comprehensive overview of various biochemical conversion processes (anaerobic digestion, direct biophotolysis, indirect biophotolysis, photo fermentation, dark fermentation, microalgae-catalyzed photo fermentation, microalgae-catalyzed dark fermentation, and traditional alcoholic fermentation by ethanologenic microorganisms) that could be adapted to transform microalgae biomass into different bioenergy products. Recent advances in biochemical conversion processes are compiled and critically analyzed, and their limitations in terms of process viability, efficacy, scalability, and economic and environmental sustainability are highlighted. Based on the current research stage and technological development, biomethane production from anaerobic digestion and bioethanol production from traditional fermentation are identified as promising methods for the future commercialization of microalgae-based bioenergy. However, significant challenges to these technologies’ commercialization remain, including the high microalgae production costs and low energy recovery efficiency. Future research should focus on reducing microalgae production costs, developing an integrated biorefinery approach, and effectively utilizing artificial intelligence tools for process optimization and scale-up to solve the current challenges and accelerate the development of microalgae-based bioenergy.

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Section: Co-digestionmentioning

confidence: 99%

Section: Co-digestionmentioning

confidence: 99%

From Microalgae to Bioenergy: Recent Advances in Biochemical Conversion Processes

et al. 2023

View full text Add to dashboard Cite

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“…Solé-Bundó et al (2019a) achieved a 60% increase in CH 4 yield applying a thermal pretreatment in the microalgae biomass and 15% after AcoD with WWTP residues (oil, grease, and fat). Zhang et al (2020) added glycerol to the AcoD of microalgae and potato processing residues and found an increase of more than 50% in CH 4 production. Assemany et al (2020) performed the…”

Section: Anaerobic Co-digestionmentioning

confidence: 99%

Integrated anaerobic digestion and algae cultivation

Calijuri,

Assemany,

Lorentz

et al. 2023

Algal Systems for Resource Recovery From Waste and Wastewater

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Anaerobic digestion is considered a versatile process that for years has been used to treat various types of waste. Besides being a low-cost technology applicable in rural and urban locations, anaerobic digestion produces multiple by-products that can be integrated into a biorefinery scenario. Similarly, microalgae biotechnology can adequately complement anaerobic digestion by improving resource recovery through a closed-loop process and contributing to a biobased green circular economy model. Therefore, this chapter aims to address current perspectives on the topic. It covers algae cultivation from anaerobic digestion residues as a post-treatment option and digestate as a potential medium for microalgae growth. Moreover, anaerobic digestion is presented as an energetic valorization route of algae biomass, including strategies to overcome main challenges, such as pre-treatment of microalgae biomass and anaerobic co-digestion. Biogas upgrading during algae cultivation is also discussed. Finally, it presents biorefinery models based on integrated microalgae and anaerobic digestion, reporting the technologies’ sustainability and environmental impacts. Future perspectives on the subject are highlighted, encouraging further studies to improve microalgae biomass production, nutrient recovery, wastewater treatment, and biogas upgrading.

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“…The high concentration of NH 3 in the digester affects the growth and metabolism of microorganisms and produces an accumulation of volatile fatty acids, which results in a decrease in biogas yield. This factor can also be supplied by choosing a good co-substrate and optimizing this C/N ratio [94].…”

Section: Effect Of Initial Conditionsmentioning

confidence: 99%

Anaerobic Co-Digestion of Microalgae and Industrial Wastes: A Critical and Bibliometric Review

Lama-Calvente¹,

Cubero²,

Fernández-Rodríguez³

et al. 2022

Progress in Microalgae Research - A Path for Shaping Sustainable Futures

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Microalgae are photosynthetic organisms able to grow faster than land plants and produce biomass with relatively high energy potential. Accumulated high-value compounds like lipids, minerals, or proteins have focused the attention of scientists due to the potential production of biofuels and other value-added products. However, several drawbacks regarding both the biochemical structure of these organisms and technological difficulties have prevented the industry for implementing a comprehensive low-cost process regarding energy and environmental contamination. Among these technologies, anaerobic digestion (AD) has greatly increased research attention because of its simplicity and the ability to produce easily recycle by-products. Moreover, anaerobic co-digestion (AcoD) has shown promising results as a method to bypass the AD problems of microalgae as a sole substrate. This review is focused on the recent trends and comparison of the AcoD process to maximize energy recovery from microalgae biomass and agro-industrial wastes. The yield of methane gas among the studied bibliography is compared and a critical review of published data and methods used is included.

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Co-digestion of microalgae with potato processing waste and glycerol: effect of glycerol addition on methane production and the microbial community

Abstract: Glycerol as an additional co-substrate enhanced methane yields by up to 128% when co-digestion with microalgae and potato waste.

Cited by 6 publications

References 69 publications

From Microalgae to Bioenergy: Recent Advances in Biochemical Conversion Processes

From Microalgae to Bioenergy: Recent Advances in Biochemical Conversion Processes

Integrated anaerobic digestion and algae cultivation

Anaerobic Co-Digestion of Microalgae and Industrial Wastes: A Critical and Bibliometric Review

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