ISOLATION AND IDENTIFICATION OF MICROALGAE FROM HIGH NITRATE LANDFILL LEACHATE

Norazela Nordin, Syakirah Samsudin, Norjan Yusof

Abstract


This study aims to isolate and identify microalgae capable of growing in high nitrate (N-NO3-) landfill leachate. Source of isolation was collected from a landfill leachate treatment plant and identified according to morphological characteristics and analysis of partial 18S and 28S rRNA genes. The isolates, identified as Chlorella vulgaris UPSI-JRM01 and Tetradesmus obliquus UPSI-JRM02 were capable of growing at high N-NO3- concentration of nitrified landfill leachate, which is up to 1500 mg/L. The biomass productivities of Chlorella vulgaris and Tetradesmus obliquus were 36.28 mg/L/day and 40.49 mg/L/day, with 44% and 37% N-NO3- removal, respectively. The biomass of Chlorella vulgaris and Tetradesmus obliquus consisted of 17.72% and 16.32% lipid and, 21.93% and 25.43% carbohydrate, respectively. The protein contents (>50%) were higher than lipid and carbohydrate contents for both microalgal species. The newly isolated microalgae species will be useful for future applications of high NO3- wastewater treatment and microalgae biomass production.


Keywords


Microalgae, Chlorella vulgaris, Tetradesmus obliquus, Microalgae Biomass

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References


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DOI: https://doi.org/10.11113/jt.v81.13581

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