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Bleach enhancement of mixed wood pulp by mixture of thermo-alkali-stable xylanase and mannanase derived through co-culturing of Alkalophilic Bacillus sp. NG-27 and Bacillus nealsonii PN-11

Heliyon, 2021-01, Vol.7 (1), p.e05673-e05673, Article e05673 [Peer Reviewed Journal]

2020 ;2020 Published by Elsevier Ltd. ;2020 Published by Elsevier Ltd. 2020 ;ISSN: 2405-8440 ;EISSN: 2405-8440 ;DOI: 10.1016/j.heliyon.2020.e05673 ;PMID: 33553710

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  • Title:
    Bleach enhancement of mixed wood pulp by mixture of thermo-alkali-stable xylanase and mannanase derived through co-culturing of Alkalophilic Bacillus sp. NG-27 and Bacillus nealsonii PN-11
  • Author: Angural, Steffy ; Bala, Indu ; Kumar, Aditya ; Kumar, Deepak ; Jassal, Sunena ; Gupta, Naveen
  • Subjects: Biobleaching ; Biological sciences ; Biotechnology ; Co-culturing ; Environmental science ; Enzymology ; Mannanase ; Microbiology ; Optimization ; Solid-state fermentation ; Xylanase
  • Is Part Of: Heliyon, 2021-01, Vol.7 (1), p.e05673-e05673, Article e05673
  • Description: The Application of a combination of enzymes is the best alternative to reduce the use of chemicals in the paper industry. Bacillus sp. NG-27 and Bacillus nealsonii PN-11 are known to produce thermoalkali stable xylanse (X) and mannanase (M) respectively having potential for pulp biobleaching. The Present study, reports the production of a mixture of X + M by co-culturing of strains in SSF and standardizing its application for pulp biobleaching. Production of enzymes by co-cultivation in SSF was optimized by statistical methods. Substantial increase in the yield of enzymes; 3.61 fold of xylanase and 37.71 fold of mannanase was achieved. Application of enzyme cocktail for pulp biobleaching resulted in a 45.64% reduction of kappa number with 55 IU g−1odp of enzyme dose (xylanase:mannanase; 3:1) at pH 8.0 in 1h at 65 °C along with significant increase in brightness (11%) and whiteness (75%). The Same quality of paper as made up from chemical treated pulp can be made from enzyme-treated pulp with 30% less use of chlorine. Structural analysis of enzyme-treated pulp showed dissolution of hemicellulose as indicated by pores, cracks and increased roughness all over the surface. Cocktail of X + M produced economically in a single fermentation having all the requisite characteristics for pulp biobleaching is a highly suitable candidate for application in the pulp and paper industry. Environmental Science; Biological Sciences; Microbiology; Biotechnology; Enzymology; Biobleaching; Co-culturing, Mannanase; Optimization; Solid-state fermentation; Xylanase.
  • Publisher: England: Elsevier Ltd
  • Language: English
  • Identifier: ISSN: 2405-8440
    EISSN: 2405-8440
    DOI: 10.1016/j.heliyon.2020.e05673
    PMID: 33553710
  • Source: TestCollectionTL3OpenAccess
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
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