The present study was focused on the diversity of microalgae and its cultivation governed by its
physicochemical parameters from the lakes of Davangere district, India. Overall, 108 genera were
documented including 29 from Chlorophyceae members (31%). Among them, Scenedesmus sp.,
Chlorella sp. and Chlorococcum sp. were frequently encountered with a high relative abundance and
species number from the study area. Based on the diversity indices, the Chlorophyceae diversity was
considerably high in polluted Bathi lake (21%), followed by Devarbelekere (18%) and Ayankere (14%)
as these lakes were enriched with phosphate, nitrate, sulphate and organic constituents. Shanthisagara
lake (8%) was documented with low nutrients and high D.O. Statistical analysis indicated that nutrients
such as PO4
-
, NO3
-
, Cl-
, DO, pH, and temperature were the most important factors regulating the growth
rate and its biomass productivity. The predominant isolates Scenedesmus sp., Chlorella sp. and
Chlorococcum sp. were cultivated using Food Waste Hydrolyzed Broth (FWHB), Corn Steep Liquor
(CSL) and Areca nut Husk Waste (AHW) and produced maximum biomass of 1.45 gm/L, 1.68 gm/L
and 0.14 gm/L with specific growth rate (?d-1) (0.362), (0.379) and (0.46) respectively. The mean
nutrient uptake was observed maximum in Scenedesmus sp. (58%) followed by Chlorella sp. (38%),
and Chlorococcum sp. (35%). Our study suggests that microalgae play a significant role as an
ecological indicator and its application for the remediation of the aquatic ecosystem. Further, the
biomass generated from the wastewater could serve as a feedstock for biofuel and biotechnological
applications.
Keywords: Microalgae, Davangere district, Bio-indicator, Waste water, Phycoremediation,
Biomass
Publication date: 01/11/2022
https://ijbpas.com/pdf/2022/November/MS_IJBPAS_2022_6554.pdf
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https://doi.org/10.31032/IJBPAS/2022/11.11.6554
