Browsing by Author "Aminabhavi, Tejraj M."
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Item Open Access Carbon emissions and decarbonisation: the role and relevance of fermentation industry in chemical sector(Elsevier, 2023-10-07) Agrawal, Deepti; Awani, Kelvin; Nabavi, Seyed Ali; Balan, Venkatesh; Jin, Mingjie; Aminabhavi, Tejraj M.; Dubey, Kashyap Kumar; Kumar, VinodFermentation industry is emerging as sustainable technological alternative to cater the production of various chemical building blocks which are commercially manufactured by petrochemical route. The primary reason for this major transition is global commitment towards decarbonisation of chemical sector, as their conventional fossil-based routes pose serious environmental threat. For instance, in 2022, the direct carbon dioxide (CO2) emission during synthesis of primary chemicals accounted for ∼ 920 Mt. CO2 is one of the prominent greenhouse gases (GHG’s), contributing majorly towards global warming effect and drastic climate change. Fermentation industry largely thrives on exploiting fermentable and organic carbon derived from edible and/or non-edible biomass and transforming them to valorised products using microbial cell factories. Therefore, the production of bio-based chemicals via this route is often associated with low or zero-carbon footprint, resulting in either carbon neutral or carbon negative products. This review focuses on different types of fermentative processes and their impact on carbon release and decarbonisation. It further discusses the relevance and contribution of fermentation industry as well as biological processes to provide a sustainable solution towards decarbonisation of chemical sector. Further, it showcases the advantages of some commercial proven and/or pipeline bio-based products over their conventional competitor fossil-based products, especially from an environmental viewpoint. Finally, advantages of biogenic CO2 from fermentation industry over other sources and CO2 removal from fermentation as a platform for carbon offsetting are covered.Item Embargo Paradigm of integrative OMICS of microbial technology towards biorefinery prospects(Elsevier, 2024-05-11) Jacob, Samuel; Rajeswari, Gunasekaran; Rai, Awantika; Tripathy, Sushree Shweta; Gopal, Swathy; Das, Eeshita; Kumar, Vinod; Jeevan Kumar, S. P.; Aminabhavi, Tejraj M.; Garlapati, Vijay KumarClimate change, finite natural resources, and increasing population necessitate producing sustainable energy with positive economic growth. Recent advances in OMICS coupled with genome editing and synthetic biology have paved the way for the development of sustainable technologies. These techniques help identify critical genes/pathways and re-construct and redesign biological pathways to develop eco-friendly and economically viable industrial metabolites. With the help of microbial technology, biorefinery-related research is actively pursued in many countries to develop microbial strains, producing varied value-added biochemicals and biofuels. The application of multi-omics data in deciphering key genes, their manipulation, and outcomes implies the domain's potential to find new horizons in biorefineries using microbial factories to produce various biofuels and biorefinery products. This review illustrates OMICS role in developing industrial chemicals and microbial biorefineries. Besides, prospects for genome editing and synthetic biology have been elucidated.Item Open Access Polydopamine-coated graphene oxide nanosheets embedded in sulfonated poly (ether sulfone) hybrid UF membranes with superior antifouling properties for water treatment(Elsevier, 2021-11-11) Kumar, Mahendra; Sreedhar, Nurshaun; Thomas, Navya; Mavukkandy, Musthafa; Ismail, Roqaya A.; Aminabhavi, Tejraj M.; Arafat, Hassan A.A novel high-performance hybrid ultrafiltration (UF) membrane was fabricated by blending polydopamine-coated graphene oxide (PDGO) nanosheets with sulfonated poly(ether sulfone) (SPES) via phase inversion method and tested for the removal of natural organic matter (humic acid; HA) from aqueous solution. The PDGO nanosheets were synthesized via self-polymerization of dopamine with GO nanosheets in alkaline tris-buffer solution at room temperature for 24 h and were fully characterized. Hybrid SPES membranes were prepared by incorporating 1–10 wt% of PDGO, which were further characterized by Raman spectroscopy, surface zeta potential, and field emission scanning electron microscopy to confirm membrane stability without any defects even by adding up to 10 wt%, of PDGO nanosheets. The membranes demonstrated a significant increase in hydrophilicity, water flux, and retention rate for HA (RHA). For instance, water permeability with 5 wt% PDGO (M5) (680.7 L m−2 h−1 bar−1) was ca. 1.8-folds that of the pristine SPES membrane (380.8 L m−2 h−1 bar−1), while maintaining an HA rejection (RHA) of 91.7% for a 50 ppm HA feed solution. This was accompanied by a distinct increase in surface hydrophilicity of M5, which showed a water contact angle of 27.8°, well below that of pristine SPES membrane (59.1°). The hybrid UF membranes also demonstrated a significant reduction in HA adhesion onto the membrane surface along with a superior antifouling performance for the membrane containing 10 wt% PDGO, giving irreversible fouling ratio (Rir) of only 6.9% compared to 32.7% for the pristine membrane.