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Nutrient recovery from food industry solid waste for cultivation of the microalga Desmodesmus sp. for production of alpha-linolenic acid

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dc.contributor.author Dayanath, WMS
dc.contributor.author Edirisinghe, D
dc.contributor.author Ariyadasa, TU
dc.contributor.editor Walpalage, S
dc.contributor.editor Gunawardena, S
dc.contributor.editor Narayana, M
dc.contributor.editor Gunasekera, M
dc.date.accessioned 2024-03-26T06:09:23Z
dc.date.available 2024-03-26T06:09:23Z
dc.date.issued 2023-08-17
dc.identifier.isbn 978-955-9027-84-3
dc.identifier.uri http://dl.lib.uom.lk/handle/123/22403
dc.description.abstract The generation of food waste by the food processing industry poses significant environmental and economic challenges globally. This study investigated the potential of utilizing industrial food waste as a source of nutrients for cultivation of the microalga Desmodesmus sp. to produce value-added biomass rich in alpha-linolenic acid. The objectives of the study were to identify the type of food waste and dilution factor of food waste hydrolysate to maximize biomass and alpha-linolenic acid yields, and assess the efficacy of nutrient recovery. The current study is the first in reported literature to utilize industrial food waste for synthesis of microalgae-based alpha-linolenic acid. First, a screening experiment was performed for growth of Desmodesmus sp. in hydrolysates of brewery waste (BrW), biscuit waste (BiW), and Thriposha waste (TW) with four dilution factors; 25%, 50%, 75% and 100% (undiluted hydrolysate). Higher biomass yields were achieved in all waste types compared to the control medium (modified Bold’s Basal media; 3N-BBM), with the maximum yield obtained using 100% TW. Thereafter, Desmodesmus sp. was cultured in photobioreactors using 100% TW, with a 3N-BBM control. The biomass growth rate and specific growth rate achieved in 100% TW hydrolysate were 0.503 g L d and 0.214 d respectively, which were significantly higher than the control. Biomass analysis showed that a significantly higher lipid content was present in the 100% TW-cultivated biomass, suggesting a higher alpha-linolenic acid extraction potential. Nevertheless, further research on techno-economic feasibility assessment and toxicology analysis is required prior to large-scale adoption of this process. en_US
dc.language.iso en en_US
dc.publisher Department of Chemical & Process Engineering University of Moratuwa. en_US
dc.subject Food industry solid waste en_US
dc.subject Microalgae cultivation en_US
dc.subject Desmodesmus sp en_US
dc.subject Desmodesmus sp alpha-linolenic acid en_US
dc.subject Nutrient recovery en_US
dc.title Nutrient recovery from food industry solid waste for cultivation of the microalga Desmodesmus sp. for production of alpha-linolenic acid en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Chemical and Process Engineering en_US
dc.identifier.year 2023 en_US
dc.identifier.conference ChemECon 2023 Solutions worth spreading en_US
dc.identifier.place Katubedda en_US
dc.identifier.pgnos p. 15 en_US
dc.identifier.proceeding Proceedings of ChemECon 2023 Solutions worth spreading en_US
dc.identifier.email thilini@uom.lk en_US


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