Sustainable immobilization strategy for Desertifilum tharense BERC-3 on corncobs to enhance biomass production and high-value metabolites

Usman, M.; Alam, M.A.; Shahid, A.; Beixiao, Z.; Khan, A.Z.; Zhao, A.; Solovchenko, A.E.; Mehmood, M.A.; Jingliang, X.

Авторы: Usman Muhammad, Alam Md Asraful, Shahid Ayesha, Beixiao Zhang, Khan Aqib Zafar, Zhao Anqi, Solovchenko A.E., Mehmood Muhammad Aamer, Jingliang Xu
Журнал: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Том: 13
Номер: 4
Год издания: 2025
Номер статьи: 117378
DOI: 10.1016/j.jece.2025.117378
Аннотация: Photosynthetic cyanobacteria offer great potential for sustainable applications due to their ability to fix CO2 while producing valuable metabolites. However, large-scale utilization of cyanobacteria faces challenges, particularly in harvesting and low biomass yields. Immobilizing cyanobacteria on natural substrates provides a sustainable solution for easier harvesting, supports circular economy principles by enhancing biomass production and resource efficiency, and promotes waste valorization. This study explored the use of corncobs, a renewable agricultural by-product, as a natural carrier for immobilizing Desertifilum tharense BERC-3 to understand the metabolic shifts and biomass composition in the immobilized system. The corncobs were pre-treated with NaOH, C2H3BrO, and methanol to enhance hydrophobicity by adjusting the duration (2 h, 44 h, 6 h, 8 h) and temperature (30 ⁰C, 45 ⁰C, 60 ⁰C, and 75 ⁰C). Exopolymeric substances were analyzed to assess the compatibility of the cyanobacteria with corncobs and to elucidate the possible immobilization mechanism. Delignification of corncobs exposes cellulose, enabling hydrogen bonding with cellulose present in the exopolymeric substances of cyanobacteria. The immobilization of D. tharense BERC-3 on delignified corncobs enhanced 1.74-fold biomass production, biomass productivity (0.25 g L 1 d 1), and CO2 fixation (6.8 g L 1). Metabolomics analyses further underscored the potential for producing high-value metabolites, including ferulic acid and trans-10- heptadecenoic. The results demonstrate the feasibility of employing corncobs as an eco-friendly substrate for immobilizing D. tharense BERC-3, advancing environmental sustainability, resource recirculation, and economic potential.
Добавил в систему: Соловченко Алексей Евгеньевич

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Sustainable immobilization strategy for Desertifilum tharense BERC-3 on corncobs to enhance biomass production and high-value metabolitesстатья

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