| Autor: |
Sadukha, Shreya, Thomas, Rohan Mani, Anand, K. G. Vijay, Bhaliya, Tulsi, Nayak, Jibananand, Singhal, Kirti, Ghosh, Arup, Dineshkumar, Ramalingam |
| Zdroj: |
Waste & Biomass Valorization; Oct2024, Vol. 15 Issue 10, p5741-5753, 13p |
| Abstrakt: |
In Agri-Nutri-Biotech industries, a consolidated bioprocess is essential to meet the increasing demand for bioactives like lutein and phytol, and to remediate the solid waste residues generated in agro-sectors. In this context, microalgae have emerged as a potential candidate for the production of the bioactives upon exploiting the agro-waste as an inexpensive nutrient source for microalgal cultivation. Accordingly, this study employed four de-oiled cakes (DOCs) derived from cottonseed (CDOC), groundnut, sesame and mustard with three different pre-treatment methods such as leachate, acidic and basic hydrolysates to select a suitable inexpensive medium for improved biomass and product yields using a marine microalga Chlorella variabilis. Among the tested pre-treated methods like leachates and hydrolysates of different DOCs, CDOC basic hydrolysate resulted in higher yields of biomass (1.23 ± 0.18 g L−1), lutein (3.8 ± 0.12 mg g−1), phytol (0.42 ± 0.01 mg g−1) and lipid (15%), as compared with the defined medium (Zarrouk's). On optimizing the concentration of CDOC basic hydrolysate (6 g L−1), the yields of lutein and phytol were found to be improved by 74% and 50%, respectively. Further, COD reduction of 82% was recorded for the optimal level of CDOC basic hydrolysate with 88–90% utilization of ammonium and phosphate. Thus, the novelty and significance of this study is to elucidate the potential utilization of de-oiled cakes derived from agro-wastes as a complete and an inexpensive nutrient source for microalgal cultivation, followed by valorisation of biomass for extraction of products like lutein, phytol and lipids. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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