Author : Shakeel A.Khan, Gulshan K.Sharma, Fayaz A.Malla, AmitKumar, Rashmi, NavinduGupta

Address : (aDivision of Environmental Sciences, Centre for Environmental Science and Climate Resilient Agriculture, ICAR- Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India National Bureau of Soil Survey and Land Use Planning, Regional Centre Jorhat, Assam, IndiacEnvironmental Sciences, Higher Education Department, Govt. of Jammu & Kashmir, Govt. Degree College Baghi Dilawar Khan Srinagar, 190002, IndiadDepartment of Botany, Dayalbagh Education Institute, Agra, Uttar Pradesh, IndiaeCSIR-RAB, Library Avenue, Pusa Complex, New Delhi, India)

Abstract : Microalgae based biofertilizers: A biorefinery approach to phycoremediate wastewater and harvest biodiesel and manure

Journal : Journal of Cleaner Production

Volume No. : Volume 211

Publish Year : 2019

Page No. : 1412-1419

Main Data : The most important requirement of the agrarian advancement is resilient nutrient source for agriculture without jeopardizing the environmental assets and economy of the country. An algal biorefinery approach is the prime requirement for the sustainable production of biodiesel and biofertilizersafter remediation of wastewater. In the present study, the microalgae Chlorellaminutissima, Scendesmus spp and Nostoc muscorum and their consortium were used for the biorefinery approach. C. minutissima has shown maximum phycoremediation potential when compared to other possible microalga and their consortium. Experimental results showed that removal of NH4+-N, NO3--N, PO4-3-P, TDS, BOD5 and COD were found to be 92, 87, 85, 96, 90 and 81% respectively. The maximum dry biomass was observed in C. minutissimafollowed by Scendesmus spp, and N. muscorum, i.e., 0.45 ± 0.01 g L-1, 0.44 ± 0.02 g L-1, 0.14 ± 0.03 g L-1 respectively. The nutrient fraction of nitrogenand phosphorus were maximum in C. minutissima, i.e., 5.46 ± 0.27 and 0.85 ± 0.03 respectively. The lipid productivity recorded maximum in Scendesmus (81.23 ± 4.5 mg L-1) followed by N. muscorum (14.29 ± 8.7 mg L-1) and C. minutissima (11.33 ± 5.6 mg L-1). Using this biomass as manure one can save the chemical fertilizer of worth about 5584 $ (US Dollar) ha-1 yr-1. The present study not only supports the sustainable phytoremediation, biodiesel production, and organic manure utilization directly but indirectly to combat climate change scenario through minimizing greenhouse gases production. Keywords: Phycoremediation; Wastewater; Biorefinery; Chlorella; Biodiesel; Biofertilizers