Journal of Environmental Biology

Novel application of fungal Phanerochaete sp. and xylanase

for reduction in pollution load of paper mill effluent

Author Details

Ravi Dutt Yadav

(Corresponding author)

Research and Development Division, Ballarpur Industries Limited (BILT),Yamuna Nagar - 135 001,

India

e-mail: rdy01@yahoo.com

Smita Chaudhry

Institute of Environmental Studies, Kurukshetra University, Kurukshetra - 136 119, India

Sanjeev Gupta

Environment Group, Thapar Centre for Industrial Research and Development,

Yamuna Nagar - 135 001, India       

Publication Data

Paper received:

25 September 2010

Revised received:

13 January 2011

Accepted:

05 February 2011

Abstract

Four different strategies of pulping and bleaching were carried out to develop alternative mechanistic ecoenvironmental friendly approaches and generated effluent was characterised. Strategy-I included Phanerochaete sp. fungal pretreatment followed by conventional bleaching, whereas in strategy-II, fungal pretreatment was followed by enzyme xylanase aided bleaching. Strategy-III also included xylanase supplement but without prior fungal pretreatment. Chemically driven pulping and bleaching was the IV strategy. Conventional C_DE_OPD₁D₂ sequence of bleaching was used for strategy–I and IV whereas XC_DE_OPD₁D₂ sequence was applied to strategy–II and III. Strategy–II was responsible for 27.5% reduction in Kappa no. whereas the maximum (27.5%) reduction in refining energy was observed with strategy–II. Biobleaching strategies– II and III were helpful in saving 37.3 and 20.3% of elemental chlorine (Cl₂) and 30.8 and 23.1% of chlorine dioxide (ClO₂)_, respectively. In comparison to control (strategy-IV), strategy II resulted in maximum pollution load reduction of chemical oxygen demand (COD), biological oxygen demand (BOD), color and adsorbable organic halides (AOX) upto 57, 60, 30 and 43.6%, respectively.

Key words

Adsorbable organic halides, Biobleaching, Biopulping, White rot fungus, Xylanase

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