International Journal of Pharma and Bio Sciences DECOLOURISATION OF RAYON EFFLUENTS AND BLEACHING OF KRAFT PULP BY STEREUM OSTREA
نویسندگان
چکیده
A potential lignolytic fungus, Stereum ostrea was analysed for the decolourisation of industrial effluents discharged from rayon pulp mills. The colour removal was from 5580.85 to 2690.05 CU during 40 days of incubation time. The laccase activity during the decolorization process was increased up to 20 day (862.77 U/L) and after that it was very low. Chemical bleaching was effective and showed 92-94% of brightness with viscosity 14 cp, while biobleaching of pulp recorded 78% of brightness with 4 cp viscosity during 40 days of solid state fermentation. The rayon sheet, after biobleaching was prepared and 76% brightness and 8 cp viscosity was noticed, which was accepted with moderate response in industries. M. A. SINGARA CHARYA Department of Microbiology Kakatiya University Warangal – 506 009
منابع مشابه
Bio-bleaching of Remazol brilliant blue-19 by Stereum ostrea
Efficiency of white-rot fungi-Stereum ostrea (S. ostrea) as a test culture and Phanerochaete chrysosporium (P. chrysosporium) as a reference culture in colour removal from a textile dye, Remazol brilliant blue-19 (RBB-19) in medium was compared in this study. S. ostrea was more efficient than P. chrysosporium in decoloration process. Different parameters pH, temperature, sources of carbon and n...
متن کاملBiomimetic TCF Bleaching of Pulp by Simple Inorganic Complexes of Cupric/Cobalt Acetate
Oxygen delignified kraft pulp from eucalyptus (E. urophylla × E. grandis) was catalytically pretreated in aerobic condition using ammonium persulfate in present of catalists like cupric acetate and/or cobalt acetate in acetic acid-water solution, i. e. S2O82--Cu2+, S2O8...
متن کاملXylanase and laccase based enzymatic kraft pulp bleaching reduces adsorbable organic halogen (AOX) in bleach effluents: a pilot scale study.
In present study, xylanase and laccase were produced in a cost-effective manner up to 10 kg substrate level and evaluated in elemental chlorine free bleaching of Eucalyptus kraft pulp. Compared to the pulp pre-bleached with xylanase (15%) or laccase (25%) individually, the ClO2 savings were higher with sequential treatment of xylanase followed by laccase (35%) at laboratory scale. The sequentia...
متن کاملLipophilic extractives in process waters during manufacturing of totally chlorine free kraft pulp from eucalypt wood.
The chemical composition of lipophilic extractives from process waters throughout a totally chlorine free (TCF) bleaching sequence after kraft pulping of eucalypt wood has been studied. These compounds are among the most problematic wood constituents for both TCF and zero liquid effluent (ZLE) processes, since they tend to accumulate in circuits resulting in the formation of the so-called pitch...
متن کاملStudies on Xylanase and Laccase Enzymatic Prebleaching to Reduce Chlorine-based Chemicals during Ceh and Ecf Bleaching
The biobleaching efficiency of xylanase and laccase enzymes was studied on kraft pulps from wood and nonwood based raw materials employed in the Indian paper industry. Treatment of these pulps with xylanase enzyme could result in improved properties, showing 2.0% ISO gain in pulp brightness and/or reducing the demand of chlorine-based bleach chemicals by up to 15% with simultaneous reduction of...
متن کامل