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Information Journal Paper

Title

INFLUENCE OF FUNGAL ENZYME PRE-TREATMENT ON TOTALLY CHLORINE-FREE (TCF) BLEACHING OF DIMETHYL FORMAMIDE BAGASSE PULP

Pages

  144-150

Abstract

 A study was carried out on totally chlorine-free (TCF) bleach ability of dim ethyl form amide (DMF) treated bagasse pulps exposed to CZ-3 and FP 90031-sp strains of white-rot fungus CERIPORIOPSIS SUBVERMISPORA. This process involved a bleaching sequence consisting of oxygen and peroxide treatment stages. The effect of enzymatic stage on bleach ability properties was studied and compared with control pulps, processed without enzyme addition. A final BRIGHTNESS of 79-80% International Standard Organization of BRIGHTNESS (ISO) was achieved after complete bleaching. The effects of direct bleaching caused pulp brightening (1.7-1.3% ISO) and delignification (>10%) immediately after the enzymatic stage. Under a peroxide charge of 3% to 9%, the improvements in BRIGHTNESS and the bleach ability of these pulps were found to be superior to those of the control during all peroxide stages. The selective bleaching of each process was assessed by changes of intrinsic viscosity. Generally higher bleach ability and bleaching selectivity of XYLANASE-treated pulps and the inevitable maximal gain in pulp BRIGHTNESS (or bleach boosting, as a main objective of XYLANASE application) were only achieved after the first and second peroxide bleaching stages. These substantially diminished by the end of the sequence.

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    APA: Copy

    SHEYKHI, AMIR, AMOU ABEDINI, GH., RASHEDI, H., ZIAEI SHIRKOLAEI, Y., SOLTAN ALI, S., & SHAMS HAGHANI, Z.. (2008). INFLUENCE OF FUNGAL ENZYME PRE-TREATMENT ON TOTALLY CHLORINE-FREE (TCF) BLEACHING OF DIMETHYL FORMAMIDE BAGASSE PULP. IRANIAN JOURNAL OF BIOTECHNOLOGY, 6(3), 144-150. SID. https://sid.ir/paper/139328/en

    Vancouver: Copy

    SHEYKHI AMIR, AMOU ABEDINI GH., RASHEDI H., ZIAEI SHIRKOLAEI Y., SOLTAN ALI S., SHAMS HAGHANI Z.. INFLUENCE OF FUNGAL ENZYME PRE-TREATMENT ON TOTALLY CHLORINE-FREE (TCF) BLEACHING OF DIMETHYL FORMAMIDE BAGASSE PULP. IRANIAN JOURNAL OF BIOTECHNOLOGY[Internet]. 2008;6(3):144-150. Available from: https://sid.ir/paper/139328/en

    IEEE: Copy

    AMIR SHEYKHI, GH. AMOU ABEDINI, H. RASHEDI, Y. ZIAEI SHIRKOLAEI, S. SOLTAN ALI, and Z. SHAMS HAGHANI, “INFLUENCE OF FUNGAL ENZYME PRE-TREATMENT ON TOTALLY CHLORINE-FREE (TCF) BLEACHING OF DIMETHYL FORMAMIDE BAGASSE PULP,” IRANIAN JOURNAL OF BIOTECHNOLOGY, vol. 6, no. 3, pp. 144–150, 2008, [Online]. Available: https://sid.ir/paper/139328/en

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