DEVELOPMENT OF SUSTAINABLE PHYCOREMEDIATION WITH THE HELP OF CHLORELLA PYRENOIDOSA FOR TEXTILE WASTEWATER ANALYSIS USING RESPONSE SURFACE METHODOLOGYSHUBHANGI MISHRA, PRADEEP SRIVASTAVA, VIRENDRA SINGH AND MONIKA SHARMAAbstract The uncontrolled utilization for the textile products is increasing year by year resulting with the elevating wastewater generated from the textile industries, which makes it among the prevalent sources of critical environmental deterioration issue globally. Products obtained from the dyes used are the primary toxic product for aquatic life, they cause aesthetic pollution, eutrophication, perturbation and increase in BOD and COD in aquatic life. Three types of textile wastewaters (Acid Yellow dye, Acid orange dye and Basic pink dye) have been used for wastewater treatment and microalga (Chlorella pyrenoidosa) was used. Nitrogen content in textile wastewaters is very less, hence urea is used as nitrogen source in wastewater. Optimal growth condition (Urea- 0.4g/L, wastewater- 40% (v/v)) is developed through Response surface methodology (RSM). The biomass productivity for Chlorella sp. is 1.2-1.5 g/L/day in textile wastewaters. The reduction efficiency of COD, Nitrate-N Ammonia-N, Phosphate-P, and Dye (color) removal for Chlorella is 90-95%, 75-85%, 90-98%, 65-74% and 40-65%. After harvesting the Biomass by flocculation method it can be further used for biofuel production by in-situ transesterification.
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