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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13310
Title: Oxygen delignification: An effective back-end modification to reduce pollution load and improve mechanical strength properties prior to bleaching
Authors: Dutt, Dharm
Tyagi C.H.
Upadhyaya J.S.
Anuj M.
Published in: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association
Abstract: Most of the Indian pulp and paper industry bleaches the pulp by conventional bleaching sequence (CEHH). The final discharge of the mill contributes to high COD load and AOX which is highly toxic in nature. The introduction of molecular O 2 before bleaching and reinforcement of alkali extraction stage with O 2 and H 2O 2 (E OP) in OC(Eop)HH bleaching sequence reduces the COD load by 40.58%, suspended solids by 24.74%, dissolved solids by 36.53%, total solids by 35.94%, AOX by 42.86% and chlorides by 34.69% than that of C(Ep)HH bleaching sequence with improvement in mechanical strength properties. The operating cost of OC(Eop)HH bleaching sequence is only Rs. 1275.00 per tonne of pulp more including the cost of bleaching chemicals compared to CEpHH bleaching sequence.
Citation: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association (2009), 21(2): 151-153
URI: http://repository.iitr.ac.in/handle/123456789/13310
Issue Date: 2009
Keywords: Bleaching
Effluent characteristics
Kraft pulping
O 2 delignification
Paper
ISSN: 3795462
Author Scopus IDs: 7005982560
6602705260
8679068400
34767980000
Author Affiliations: Dutt, D., Department of Paper Technology, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur 247-001, India
Tyagi, C.H., Department of Paper Technology, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur 247-001, India
Upadhyaya, J.S., Department of Paper Technology, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur 247-001, India
Anuj, M., Department of Paper Technology, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur 247-001, India, Star Paper Mills Ltd., Saharanpur-247001, India
Corresponding Author: Dutt, D.; Department of Paper Technology, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur 247-001, India
Appears in Collections:Journal Publications [PT]

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