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Integration of food industry wastewater for cultivation of desmodesmus sp. to synthesize alpha-linolenic acid

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dc.contributor.author Gamage, GDNC
dc.contributor.author Hannadige, SKHN
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 2024-03-26T06:02:39Z
dc.date.available 2024-03-26T06:02:39Z
dc.date.issued 2023-08-17
dc.identifier.isbn 978-955-9027-84-3
dc.identifier.uri http://dl.lib.uom.lk/handle/123/22401
dc.description.abstract Microalgae biomass production for food and fuel applications necessitates the use of resources such as water and nutrients, raising sustainability concerns. This study aimed to integrate food industry wastewaters as a source of nutrients and water for microalgae cultivation while simultaneously performing bioremediation. Nonetheless, wastewaterbased microalgae cultivation requires the identification of suitable wastewater streams, nutrient loads, and appropriate media sterilization methods to prevent culture failure due to contamination. In the current study, the microalga Desmodesmus sp. was cultivated in wastewater-based media for synthesis of the nutritionally-valuable alpha-linolenic acid. This study is the first in literature wherein a comparative assessment was performed between autoclaving and filtration as methods for wastewater sterilization. A screening experiment for Desmodesmus sp. growth was performed using brewery wastewater (BrW), coconut processing industry wastewater (CW) and biscuit wastewater (BiW) obtained from the food industry, under 25%, 50%, 75%, and 100% (undiluted) concentrations. Undiluted BiW was the most suitable media, as it resulted in the highest final biomass yields. Thereafter, undiluted BiW sterilized by autoclaving and filtration was used to culture Desmodesmus sp. in photobioreactors with Modified Bold’s Basal Media used as the control. BiW showed higher biomass yields and specific growth rate compared to the control. A higher lipid productivity of 16.78 mg L d was exhibited in autoclaved medium as compared to 9.92 mg L d in the filtered medium. Thus, BiW sterilized via autoclaving was identified as a promising growth medium for alpha linolenic acid production from a circular economic perspective. en_US
dc.language.iso en en_US
dc.publisher Department of Chemical & Process Engineering University of Moratuwa. en_US
dc.subject Food industry wastewater en_US
dc.subject Desmodesmus sp en_US
dc.subject Microalgae cultivation en_US
dc.subject Alpha-linolenic acid en_US
dc.subject sterilization en_US
dc.title Integration of food industry wastewater for cultivation of desmodesmus sp. to synthesize 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. 17 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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