Monosodium glutamate wastewater assisted seawater to increase lipid productivity in single-celled algae

Mingyan Liu, Ze Yu, Liqun Jiang, Qingjie Hou, Zhen Xie, Meng Ma, Siteng Yu and Haiyan Pei

Renewable Energy, 2021, vol. 179, issue C, 1793-1802

Abstract: Using seawater supplemented with waste sources to cultivate freshwater algae has become a promising approach for biomass production. To make seawater cater algae, anaerobically digested effluent from kitchen waste (S + ADE-KW) or monosodium glutamate wastewater (S + MSG) was added as nutrient sources. Single- and multiple-cell algae — Scenedesmus sp. SDEC-8, Golenkinia sp. SDEC-16 and Chlorella sorokiniana SDEC-18 were cultivated in seawater-based media to explore the growth and main metabolites. Morphology and pigment changes revealed that spherical, single-celled SDEC-16 and SDEC-18 had better adaptation to the seawater-based media than multiple-celled SDEC-8. In S + MSG, SDEC-16 and SDEC-18 achieved higher biomass concentration (around 0.80 g/L) and lipid productivity (47.99 and 35.90 mg/L/d, respectively) than that in S + ADE-KW, owing to higher phosphorus concentration (5.51 mg/L) and lower free ammonia toxicity (11.48 mg/L) in S + MSG. In addition, the lipid productivities of SDEC-16 and SDEC-18 were able to triple and quadruple their output in the BG11 medium, respectively, due to the salt stress from seawater. Meanwhile the protein of SDEC-16 and SDEC-18 are still potential biomass resources that could attain 13.11 and 18.09 mg/L/d in S + MSG. This therefore confirms that utilization of monosodium glutamate wastewater and seawater has great potential to optimize microalgal production.

Keywords: Anaerobically digested effluent; Monosodium glutamate wastewater; Seawater; Lipid (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:179:y:2021:i:c:p:1793-1802

DOI: 10.1016/j.renene.2021.08.006

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