One-time cultivation of Chlorella pyrenoidosa in aqueous dye solution supplemented with biochar for microalgal growth, dye decolorization and lipid production

•Biochar was synthesized from abundantly available waste wood sawdust.•Higher biomass productivity (17.63 mg L−1d−1) was recorded in biochar-Cp cells.•Highest dye removal was observed by biochar-Cp cells at pH 3 after 180 min.•Biochar-Cp cells were rich in C16 and C18 fatty acids.