Cultivation of microalgae on food waste: Recent advances and way forward

Kumar, Yogesh; Kaur, Samandeep; Kheto, Ankan; Munshi, Mohona; Sarkar, Ayan; Pandey, Hari Om; Tarafdar, Ayon; Sindhu, Raveendran; Sirohi, Ranjna

doi:10.1016/j.biortech.2022.127834

Cited by 30 publications

(3 citation statements)

References 136 publications

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“…Furthermore, recent developments in the field of enzyme technology are focused at breaking down the food waste at the molecular level to obtain valuable products ( 219 , 220 ). Another innovative approach involves utilizing food waste as culture medium to grow algae which provides a sustainable source of biomass for various applications ( 221 , 222 ). A few strategies involve a combination of techniques for the management or upcycling of organic waste products.…”

Section: Future Trends In Waste Managementmentioning

confidence: 99%

The future in the litter bin – bioconversion of food waste as driver of a circular bioeconomy

Razouk,

Tiganescu,

von Glahn

et al. 2024

Front. Nutr.

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Bioconversion of organic waste requires the development and application of rather simple, yet robust technologies capable of transferring biomass into energy and sustainable materials for the future. Food waste plays a significant role in this process as its valorisation reduces waste and at the same time avoids additional exploitation of primary resources. Nonetheless, to literally become “litterate”. extensive research into such robust large-scale methods is required. Here, we highlight some promising avenues and materials which fulfill these “waste to value” requirements, from various types of food waste as sustainable sources for biogas, bioethanol and biodiesel to fertilizers and antioxidants from grape pomace, from old-fashioned fermentation to the magic of anaerobic digestion.

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Section: Future Trends In Waste Managementmentioning

confidence: 99%

The future in the litter bin – bioconversion of food waste as driver of a circular bioeconomy

Razouk,

Tiganescu,

von Glahn

et al. 2024

Front. Nutr.

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“…Unveiling the details of various substrate assimilations could provide opportunities to overcome the limitations of biotechnological industries caused by the application of “expensive” substrates, such as sucrose. Alternatively, industrial waste could be used, as in the case of microalgae cultivation [ 64 , 65 ]. In this review, we will discuss the variety of organic substrates used to maintain plant cell cultures’ growth, and the main mechanisms by which these compounds are incorporated into metabolism.…”

Section: Introductionmentioning

confidence: 99%

Plant Heterotrophic Cultures: No Food, No Growth

Puzanskiy,

Romanyuk,

Kirpichnikova

et al. 2024

Plants

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Plant cells are capable of uptaking exogenous organic substances. This inherited trait allows the development of heterotrophic cell cultures in various plants. The most common of them are Nicotiana tabacum and Arabidopsis thaliana. Plant cells are widely used in academic studies and as factories for valuable substance production. The repertoire of compounds supporting the heterotrophic growth of plant cells is limited. The best growth of cultures is ensured by oligosaccharides and their cleavage products. Primarily, these are sucrose, raffinose, glucose and fructose. Other molecules such as glycerol, carbonic acids, starch, and mannitol have the ability to support growth occasionally, or in combination with another substrate. Culture growth is accompanied by processes of specialization, such as elongation growth. This determines the pattern of the carbon budget. Culture ageing is closely linked to substrate depletion, changes in medium composition, and cell physiological rearrangements. A lack of substrate leads to starvation, which results in a decrease in physiological activity and the mobilization of resources, and finally in the loss of viability. The cause of the instability of cultivated cells may be the non-optimal metabolism under cultural conditions or the insufficiency of internal regulation.

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“…Indeed, raw materials in heterotrophic production account for 23-40% of the total production costs [18]. In this context, the use of various side streams or by-products as sources of nutrients is one of the main alternatives with which to make this type of process profitable and to reduce the environmental impact of by-products or wastewaters [19][20][21][22][23][24][25][26]. However, when using many of these by-products, pretreatments are needed prior to their use as culture media, increasing production costs.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Biomass and Protein Production of Chlorella protothecoides in Heterotrophic Cultivation Using Expired Juices as Alternative Source of Nutrients for an Added-Value Biorefinery Scheme

2023

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Microalgae are among the most suitable sources of new protein ingredients and bioactive compounds, although their cost-effective production still remains a developmental bottleneck. Heterotrophic growth has advantages, such as higher productivity and non-dependence on light and CO2, but it has not yet been fully implemented. The aim of this study was to increase the biomass and protein of Chlorella protothecoides in heterotrophic conditions using expired fruit and vegetable juices (FVJ) and to compare the results to those obtained using a modified Bristol (MB) medium. The initial amounts of sugars (15 g L−1) and yeast extract (8 g L−1) led to the highest protein production (43%) and protein yield (5.2 g L−1) in trials using 1 L bottles. Bioreactor trials using FVJ resulted in a similar biomass productivity (2.94 g L−1 d−1) compared to MB (3.04 g L−1 d−1) and in enhanced polyunsaturated fatty acid content; nonetheless, a lower amount of essential amino acids (EAA) was obtained. Biomass was further processed by ultra-high-pressure homogenisation for protein concentration and residual pellet production. The protein extracts showed significant increases in EAA (11.8% and 26% increase in MB and FVJ, respectively). Residual biomass showed potential as a source of lutein and antimicrobial compounds. The results indicate that FVJ is a promising source of nutrients for the heterotrophic production of C. protothecoides, and that the extracts obtained present nutritional profiles and bioactivities of potential interest.

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Cultivation of microalgae on food waste: Recent advances and way forward

Cited by 30 publications

References 136 publications

The future in the litter bin – bioconversion of food waste as driver of a circular bioeconomy

The future in the litter bin – bioconversion of food waste as driver of a circular bioeconomy

Plant Heterotrophic Cultures: No Food, No Growth

Enhancement of Biomass and Protein Production of Chlorella protothecoides in Heterotrophic Cultivation Using Expired Juices as Alternative Source of Nutrients for an Added-Value Biorefinery Scheme

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