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Abstract

Synthetic microalgae ecology is a promising approach to regulate the concentrations of nutrients in wastewater reservoirs. The aim of experiments was to evaluate the role of six microalgae monocultures and their consortia in restoring the water quality of water reservoirs represented here in the form of media BG11 + (nitrate rich), BG11 -(nitrate poor) and wastewater from carpet effluent (CE). The algal species utilized in the present experiment were Anabaena sp., Chlorella sp., Oscillatoria sp., Nannochloropsis sp., Scenedesmus sp., Phormidium sp., and their synthetic consortia. The water parameters analyzed were dissolved oxygen (DO), water conductivity, pH and concentrations of nutrients (nitrates, phosphates, nitrites). We observed that Chlorella sp. produced maximum biomass of 2.217±0.126 g.L -1 in BG11 + media followed by ) in CE respectively. The range of pH value and DO for different media was found between 8.25-8.87 and 6.14-10.54 mg.L -1 respectively, and conductivity was increased with the growth of algae. The study suggests that beneficial algae and their consortia can be logically selected for biomass production and for improving the water quality.