Production of ethanol and value added product (biofertilizer) from algae for sustainable development

Abstract The present study was carried out in the coastal region and freshwater bodies in the year of 2021 and 2024 in Maharashtra state, India. The macro and micro algae were collected in the month of September. Algae have high growth rate and can be sustain in extreme condition, which result in high ethanol production rate. The production of bio- energy is dependent on different composition of algal species, environmental factors, and growth rate. The focus of the present research was to study diversity of algal species in coastal and fresh water for production of bioethanol (biodisel) and production of biofertilizer from the residual fermentation substrate with floral waste. The aim of research was to enrich the soil quality and to reduce the solid waste and water pollution, produced due to disposal of floral waste in water bodies. Average ethanol production from algae was in the range of 9.21 % to 19.72 % on the basis of type of algae. The maximum production of ethanol was from algal species of Nannochloropsis and chlorella, under optimum laboratory conditions. The mineral contain in the algal biomass were in the range of 0.11 to 18.1 mg/L, which produce high quality biofertilizer.