Abstract
S. polyrhiza will be considering as a 2G feedstock, as generating 15–22 g/m2d fresh biomass by improving the quality of sewage. We propose a tractable circular process for pigments, lipid, Nano-catalysts and energy dense substrate (starch) from S. polyrhiza biomass. A ton of S. polyrhiza biomass was responsible for production of 0.8–1.2 kg of R-phycoerythrin, 0.7–0.9 kg of R-phycocyanin, 2.7–4.3 kg of lipids, 5.3–6.1 kg of ZVI, 79.7–80.4 kg of starch. The produced starch was further fermented to yield 38.8–40.8 l of ethanol. The waste generated in each step was utilized to produce 2.23 lakh liter biogas equivalent 8.51 GJ energy. The elimination of residue, reduce ∼79–85% in chemicals and energy usage in starch extraction. The synthesized ZVI efficiently mineralized RV5 wastewater at the rate of 26.29 ± 0.23 kgCODm−3d−1 up to seven cycles. S. polyrhiza reduce ∼240 kgCO2-eq for attaining one-ton fresh biomass. Overall findings will the base for starting bio-industries which minimizing the dependence on the terrestrial resources for food, energy and chemicals.
Published Version
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