Nutrients utilization and biomass production by microalgae culture development in wastewater

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Research Paper 01/06/2018
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Nutrients utilization and biomass production by microalgae culture development in wastewater

Faryal Kabir, Muhammad Gulfraz, Ghazala Kaukab Raja, Muhammad Inam-ul-Haq, Muhammad Sheeraz Ahmad, Muhammad Farooq Nasir, Muhammad Awais, Iram Batool
Int. J. Biosci.12( 6), 460-469, June 2018.
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The growth of microalgae for production of biofuels is beneficial when sewage wastewater is used as a growth media because of two reasons; wastewater treatment and cost effective biomass generation as compared to artificial growth medium cultivation. In this study, three microalgae species (Chlorella vulgaris, Selenastrum sp. and Chlorococcum humicola) were isolated from freshwater as well as wastewater sample and were purified. Treatment of sewage was carried out for effective utilization of nutrients by these strains, whereas biomass and lipid productivity was measured accordingly. The wastewater treatment by C. vulgaris shows 98% COD and more than 90% TN removal efficiency. Total phosphorus and ammonia was removed almost 100% by all of the strains. The treatment efficiency and biomass productivity of Selenastrum sp. was less as compared to other strains while C. vulgaris shows higher lipid productivity. According to results the biomass productivity can be further enhanced by addition of external nitrogen and carbon source to wastewater media. While treatment of domestic wastewater along with production of biomass is a key strategy to produce many biobased co-products including biodiesel.


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