Creating value from purple phototrophic bacteria via single-cell protein production

Hülsen, Tim; Barnes, Andrew C.; Batstone, Damien J.; Capson-Tojo, Gabriel

doi:10.1016/j.copbio.2022.102726

Cited by 14 publications

(5 citation statements)

References 66 publications

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“…The capital/operating costs would need to be balanced out with a high product cost such as food-related products or high-value feed for making the process economically feasible. Specifically, although the amino acid content of the biomass was lower than that of fishmeal, the potential application of the PPB mixed culture biomass would be as a partial substitute of fishmeal since its market price is higher (2 € kg -1 protein ) than the one of soybean meal (0.7 € kg -1 protein ) (Alloul et al, 2021a;Hülsen et al, 2022a). In this regard, the application of PPB biomass as a substitute for feed for aquaculture species has been previously demonstrated in diverse species (Alloul et al, 2021b;Delamare-Deboutteville et al, 2019).…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Potential of enriched phototrophic purple bacteria for H2 bioconversion into single cell protein

Rodero,

Magdalena,

Steyer

et al. 2024

Science of The Total Environment

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Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Potential of enriched phototrophic purple bacteria for H2 bioconversion into single cell protein

Rodero,

Magdalena,

Steyer

et al. 2024

Science of The Total Environment

Self Cite

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“…31 Their unique capacity for near-infrared light absorption by bacteriochlorophylls or visible light absorption by carotenoids highlights their suitability for carbon dioxide capture and single-cell protein production in Australia, where solar radiation is abundant. 32 Additionally, carbon dioxide capturing through microalgae to produce biodiesel offers another interesting avenue to harvest solar energy to fix carbon dioxide with high biomass yield. 33 Finally, it is also possible to produce biochemicals such as ethanol, methane, hydrogen and propanediol through microbial electrosynthesis with renewable electricity as input.…”

Section: Innovative Co 2 Capturementioning

confidence: 99%

Mitigating greenhouse gas emissions from waste treatment through microbiological innovation

2023

Microbiol. Aust.

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The emission of greenhouse gases (GHGs) from the treatment of municipal, agricultural and industrial waste occurs in virtually every city on our planet. This is due to various microbial activities at different stages of waste treatment. Traditional treatment methods have a significant environmental impact, producing methane, carbon dioxide and nitrous oxide emissions, in addition to demanding high energy input and having low treatment efficiencies. To address these issues, the Australian water and waste sectors are shifting towards the adoption of next-generation, carbon-neutral treatment options. Here I discuss our current knowledge gaps in mitigating GHG emissions from waste streams, with a focus on wastewater treatment plants. I highlight the application of real-time genomics to identify sources of GHG emissions, monitor mitigation efforts, assist process operation and guide plant operations. I also emphasise recent innovations of microbial processes that capture GHG from waste and upgrade them into higher value products. Ultimately, combined effort across disciplines is required to proactively mitigate the global threat of climate change.

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“…Actually, some studies have focused on the use of purple phototrophic bacteria (~60% crude protein DW), as feed for salmonids, carnivorous marine fish, and shrimp. However, it is not yet possible to find applications for this product at an industrial level since it is in the early stages of development [ 90 ]. Therefore, even though to the date several species of bacteria have been proven to be safe and efficient to replace the animal protein content in aquaculture species’ diets, it is worthy to keep evaluating more species to disclose their potential as feed.…”

Section: Single-cell Proteins Production Systemsmentioning

confidence: 99%

Single-Cell Proteins Obtained by Circular Economy Intended as a Feed Ingredient in Aquaculture

Pereira

Fraga-Corral

García-Oliveira

et al. 2022

Foods

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The constant increment in the world’s population leads to a parallel increase in the demand for food. This situation gives place the need for urgent development of alternative and sustainable resources to satisfy this nutritional requirement. Human nutrition is currently based on fisheries, which accounts for 50% of the fish production for human consumption, but also on agriculture, livestock, and aquaculture. Among them, aquaculture has been pointed out as a promising source of animal protein that can provide the population with high-quality protein food. This productive model has also gained attention due to its fast development. However, several aquaculture species require considerable amounts of fish protein to reach optimal growth rates, which represents its main drawback. Aquaculture needs to become sustainable using renewable source of nutrients with high contents of proteins to ensure properly fed animals. To achieve this goal, different approaches have been considered. In this sense, single-cell protein (SCP) products are a promising solution to replace fish protein from fishmeal. SCP flours based on microbes or algae biomass can be sustainably obtained. These microorganisms can be cultured by using residues supplied by other industries such as agriculture, food, or urban areas. Hence, the application of SCP for developing innovative fish meal offers a double solution by reducing the management of residues and by providing a sustainable source of proteins to aquaculture. However, the use of SCP as aquaculture feed also has some limitations, such as problems of digestibility, presence of toxins, or difficulty to scale-up the production process. In this work, we review the potential sources of SCP, their respective production processes, and their implementation in circular economy strategies, through the revalorization and exploitation of different residues for aquaculture feeding purposes. The data analyzed show the positive effects of SCP inclusion in diets and point to SCP meals as a sustainable feed system. However, new processes need to be exploited to improve yield. In that direction, the circular economy is a potential alternative to produce SCP at any time of the year and from various cost-free substrates, almost without a negative impact.

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Creating value from purple phototrophic bacteria via single-cell protein production

Cited by 14 publications

References 66 publications

Potential of enriched phototrophic purple bacteria for H2 bioconversion into single cell protein

Potential of enriched phototrophic purple bacteria for H2 bioconversion into single cell protein

Mitigating greenhouse gas emissions from waste treatment through microbiological innovation

Single-Cell Proteins Obtained by Circular Economy Intended as a Feed Ingredient in Aquaculture

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