Anaerobic digestion challenges and resource recovery opportunities from land-based aquaculture waste and seafood processing byproducts: A review

Choudhury, Abhinav; Lepine, Christine; Witarsa, Freddy; Good, Christopher

doi:10.1016/j.biortech.2022.127144

Cited by 34 publications

(11 citation statements)

References 105 publications

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“…Anaerobic digestion of seafood industry effluents in a dissolved air flotation (DAF) system removed organic contents. 10 Suitable membrane processes including microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), and forward osmosis (FO) can remove proteins, lipids, etc. Electrochemical oxidation reduces organic matter from aquaculture effluents.…”

Section: Carotenoidsmentioning

confidence: 99%

Green Chemistry to Valorize Seafood Side Streams: An Ecofriendly Roadmap toward Sustainability

Venugopal,

Sasidharan,

Rustad

2023

J. Agric. Food Chem.

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A major challenge facing sustainable seafood production is the voluminous amounts of nutrient-rich seafood side streams consisting of by-catch, processing discards, and process effluents. There is a lack of a comprehensive model for optimal valorization of the side streams. Upcoming green chemistry-based processing has the potential to recover diverse valuable compounds from seafood side streams in an ecofriendly manner. Microbial and enzymatic bioconversions form major green processes capable of releasing biomolecules from seafood matrices under mild conditions. Novel green solvents, because of their low toxicity and recyclable nature, can extract bioactive compounds. Nonthermal technologies such as ultrasound, supercritical fluid, and membrane filtration can complement green extractions. The extracted proteins, peptides, polyunsaturated fatty acids, chitin, chitosan, and others function as nutraceuticals, food supplements, additives, etc. Green processing can address environmental, economic, and technological challenges of valorization of seafood side streams, thereby supporting sustainable seafood production. Green processing can also encourage bioenergy production. Multiple green processes, integrated in a marine biorefinery, can optimize valorization on a zero-waste trade-off, for a circular blue economy. A green chemistry-based valorization framework has the potential to meet the Sustainable Development Goals (SDGs) of the United Nations.

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Section: Carotenoidsmentioning

confidence: 99%

Green Chemistry to Valorize Seafood Side Streams: An Ecofriendly Roadmap toward Sustainability

Venugopal,

Sasidharan,

Rustad

2023

J. Agric. Food Chem.

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“…The anaerobic digestion of aquaculture wastewater still concerns few studies, but its application has been considered an advantageous treatment alternative [159,160]. In cultivation systems that use recirculating aquaculture systems (RAS), the solid waste collected, mainly containing fecal matter and uneaten feed, can be anaerobically treated.…”

Section: Secondary Effluents Compositionmentioning

confidence: 99%

Agro-Industrial Wastewaters for Algal Biomass Production, Bio-Based Products, and Biofuels in a Circular Bioeconomy

et al. 2022

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Recycling bioresources is the only way to sustainably meet a growing world population’s food and energy needs. One of the ways to do so is by using agro-industry wastewater to cultivate microalgae. While the industrial production of microalgae requires large volumes of water, existing agro-industry processes generate large volumes of wastewater with eutrophicating nutrients and organic carbon that must be removed before recycling the water back into the environment. Coupling these two processes can benefit the flourishing microalgal industry, which requires water, and the agro-industry, which could gain extra revenue by converting a waste stream into a bioproduct. Microalgal biomass can be used to produce energy, nutritional biomass, and specialty products. However, there are challenges to establishing stable and circular processes, from microalgae selection and adaptation to pretreating and reclaiming energy from residues. This review discusses the potential of agro-industry residues for microalgal production, with a particular interest in the composition and the use of important primary (raw) and secondary (digestate) effluents generated in large volumes: sugarcane vinasse, palm oil mill effluent, cassava processing waster, abattoir wastewater, dairy processing wastewater, and aquaculture wastewater. It also overviews recent examples of microalgae production in residues and aspects of process integration and possible products, avoiding xenobiotics and heavy metal recycling. As virtually all agro-industries have boilers emitting CO2 that microalgae can use, and many industries could benefit from anaerobic digestion to reclaim energy from the effluents before microalgal cultivation, the use of gaseous effluents is also discussed in the text.

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“…5 In addition, the high sulfate concentration negatively affects methanogenesis due to the toxicity of H 2 S produced by sulfate reduction. 7 Due to the presence of H 2 S, a complex biogas handling system is necessary for cleaning biogas, which further increases the cost. Nowadays, volatile fatty acid (VFA) production has been deemed a high-value roadmap for MSW treatment.…”

Section: ■ Introductionmentioning

confidence: 99%

“…High salinity is the main bottleneck for methane production, which could suppress the activity of methanogenic archaea and lead to cell lysis, resulting in low methane yield . In addition, the high sulfate concentration negatively affects methanogenesis due to the toxicity of H 2 S produced by sulfate reduction . Due to the presence of H 2 S, a complex biogas handling system is necessary for cleaning biogas, which further increases the cost.…”

Section: Introductionmentioning

confidence: 99%

Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

Liu,

Deng,

et al. 2023

ACS Sustainable Chem. Eng.

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Sulfidogenesis is a non-negligible process during the acidogenic fermentation of mariculture solid waste (MSW), and its interactions with acidogenesis are still unclear. To fill this gap, this study explored the co-metabolism mechanisms of acidogenesis and sulfidogenesis during the acidogenic fermentation of MSW with thermal (TH) pretreatment, alkaline fermentation (AF), and their combination (TH-AF) pretreatment. The interactions of sulfidogenesis and acidogenesis were altered by the changes in substrate availability and fermentation environment under the intervention of TH and AF pretreatments. Both acidogenesis and sulfidogenesis were boosted with TH pretreatment by supplying adequate substrates, and their competition for substrates was alleviated. Moreover, sulfidogenesis was constrained by 87.3% with TH-AF pretreatment, which reduced volatile fatty acid (VFA) consumption by sulfate reduction bacteria (SRB) and further enhanced the VFA accumulation. Notably, acidogenesis could be promoted by sulfidogenesis due to the enhancement of MSW hydrolysis and enrichment of acidogenic bacteria (Prolixibacter, Ruminococcus, etc.). Different pretreatments could redirect the metabolic pathways by changing the types of key functional microorganisms and enzymes in MSW anaerobic fermentation. Overall, this study provides useful information for developing an efficient and sustainable treatment of MSW.

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Anaerobic digestion challenges and resource recovery opportunities from land-based aquaculture waste and seafood processing byproducts: A review

Cited by 34 publications

References 105 publications

Green Chemistry to Valorize Seafood Side Streams: An Ecofriendly Roadmap toward Sustainability

Green Chemistry to Valorize Seafood Side Streams: An Ecofriendly Roadmap toward Sustainability

Agro-Industrial Wastewaters for Algal Biomass Production, Bio-Based Products, and Biofuels in a Circular Bioeconomy

Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

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