Remediation of pulp and paper mill effluent and CO<sub>2</sub> sequestration using microalgal polycultures

Rajesh Ch; ra; Uttam Kumar Ghosh

doi:10.21767/2572-4657-C1-015

Remediation of pulp and paper mill effluent and CO₂ sequestration using microalgal polycultures

10^th Edition of International Conference on Biofuels and Bioenergy

March 04-05, 2019 Barcelona, Spain

Rajesh Chandra and Uttam Kumar Ghosh

Indian Institute of Technology Roorkee, Uttar Pradesh, India

Posters & Accepted Abstracts: Arch Chem Res

Abstract:

This study was undertaken to evaluate the use of mixed microalgal cultures (MMC) of Chlorella minutissima (C. minutissima) and Scenedesmus abundans (S. abundans) for pulp and paper mill effluent (PPME) remediation in batch mode. Effects of different photoperiods (light:dark); 12:12, 18:6 and 24:0 h, and different concentrations of CO2 supply were also observed on the biomass growth of MMC and removal of pollution load from PPME. A remarkable variation was noticed among the growth profiles of MMC at different photoperiods and different CO2 concentrations. Supply of 10 g/L of glucose in culture broth resulted in improved biomass growth of MMC. Highest biomass of 0.67 g/L and lipid yield of 73.7 mg/L were achieved with 5% CO2 supply and 18:6 h photoperiod at 25±1°C. Removal of various parameters were achieved as 73% COD, 81% BOD, 85% TDS, 68% phenols, and 61% color. This study suggests that the mixed microalgal cultures can offer a simple and effective remediation of PPME and simultaneous CO2 sequestration. GC-MS analysis of fatty acid methyl esters (FAMEs) shown the presence of C16:0, C18:0, C18:1, C18:3 and C20:0 as major fatty acids.