Browsing by Author "Devi, A"

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    Fungi based valorization of wheat straw and rice straw for cellulase and xylanase production
    (2024-01) Devi, A; Singh, A; Kothari, R
    A total of 29 fungal species were isolated from different ecological habitats of Jammu region and screened for cellulase and xylanase production. The potent fungal species were identified as Aspergillus flavus, Aspergillus terreus, Ramichloridium apiculatum, Fusarium pallidoroseum and were compared with the commercially available strains. Out of these, A. flavus and A. terreus exhibit significant cellulolytic and xylanolytic activities on alkali pretreated wheat straw. R. apiculatum was first time reported for cellulolytic and xylanolytic activities in the present study. The maximum xylanolytic activity was shown by A. flavus ITCC 11854.23 as 4.68 U/ml when utilizing alkali treated rice straw. In this investigation, the enzymatic activities of the isolated strains out performed the commercial strains. This study provides a baseline to extract enzymes from these potential fungal species on utilizing low-cost substrates to make the industrial processes more economic and sustainable.
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    A panoramic view of technological landscape for bioethanol production from various generations of feedstocks
    (2022-06) Devi, A; Bajar, S; Sihag, P; Sheikh, Z; Singh, A
    Bioethanol is an appropriate alternate energy option due to its renewable, nontoxic, environmentally friendly, and carbon-neutral nature. Depending upon various feedstocks, bioethanol is classified in different various generations. First-generation ethanol created a food vs fuel problem, which was overcome by second-generation, third-generation and fourth-generation ethanol. The considerable availability of lignocellulosic biomass makes it a suitable feedstock, however, its recalcitrant nature is the main hurdle in converting it to bioethanol. The present study gives a comprehensive assessment of global biofuel policies and the current status of ethanol production. Feedstocks for first-generation (sugar and starch-based), second-generation (lignocellulosic biomass and energy crops), third-genera tion (algal-based) and fourth-generation (genetically modified algal biomass or crops) are discussed in detail. The study also assessed the process for ethanol production from various feedstocks, besides giving a holistic background knowledge on the bioconversion process, factors affecting bioethanol production, and various microorganisms involved in the fermentation process. Biotechnological tools also play a pivotal role in enhancing process efficiency and product yield. In addition, most significant development in the field of genetic engineering and adaptive evolution are also highlighted.
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    A panoramic view of technological landscape for bioethanol production from various generations of feedstocks
    (2023-07) Devi, A; Bajar, S; Sihag, P; Singh, A
    Bioethanol is an appropriate alternate energy option due to its renewable, nontoxic, environmentally friendly, and carbon-neutral nature. Depending upon various feedstocks, bioethanol is classified in different various generations. First-generation ethanol created a food vs fuel problem, which was overcome by second-generation, third-generation and fourth-generation ethanol. The considerable availability of lignocellulosic biomass makes it a suitable feedstock, however, its recalcitrant nature is the main hurdle in converting it to bioethanol. The present study gives a comprehensive assessment of global biofuel policies and the current status of ethanol production. Feedstocks for first-generation (sugar and starch-based), second-generation (lignocellulosic biomass and energy crops), third-genera tion (algal-based) and fourth-generation (genetically modified algal biomass or crops) are discussed in detail. The study also assessed the process for ethanol production from various feedstocks, besides giving a holistic background knowledge on the bioconversion process, factors affecting bioethanol production, and various microorganisms involved in the fermentation process. Biotechnological tools also play a pivotal role in enhancing process efficiency and product yield. In addition, most significant development in the field of genetic engineering and adaptive evolution are also highlighted.