Cultivation of algae consortium in a dairy farm wastewater for biodiesel production

• Algal consortium was feasible option of bioremediation and biodiesel production.
• Consortium can reduce >98% COD within 4–5 days of culture in dairy farm wastewater.
• High-valued arachidonic acid and eicosapentaenoic acid were also produced.
• 153.54 t and 29,470 L ha−1 year−1 biomass and algal oil produced, respectively.

Dairy farm wastewaters are potential resources for production of microalgae biofuels. A study was conducted to evaluate the capability of production of biodiesel from consortium of native microalgae culture in dairy farm treated wastewater. Native algal strains were isolated from dairy farm wastewaters collection tank (untreated wastewater) as well as from holding tank (treated wastewater). The consortium members were selected on the basis of fluorescence response after treating with Nile red reagent. Preliminary studies of two commercial and consortium of ten native strains of algae showed good growth in wastewaters. A consortium of native strains was found capable to remove more than 98% nutrients from treated wastewater. The biomass production and lipid content of consortium cultivated in treated wastewater were 153.54 t ha−1 year−1 and 16.89%, respectively. 72.70% of algal lipid obtained from consortium could be converted into biodiesel.

Figure optionsDownload as PowerPoint slide