3. Ballarpur Industries Limited (BILT) is India’s largest manufacturer of writing and printing
(W&P) paper. Production - 81,442 MT per annum (2009-10)
• The production process consists two main steps: pulping and bleaching.
• Pulping, In this process, wood chips as raw material are treated to remove lignin to
liberate cellulose fibers for papermaking.
• Pulping is the initial stage and the source of the most pollutant of this industry.
• Bleaching is the last step, which aims to whiten and brighten the pulp.
• Whole processes of this industry are very energy and water intensive in terms of the fresh
water utilization.
• 80-90 million kg of toxic pollutants are released every year from this industry.
BACKGROUND
6. Waste water :
The waste waters include high concentration of chemicals such as :
Na2CO3, Na2SO3, bisulphites, elemental chlorine or chlorine dioxide, peroxides.
Strong corrosive waste like NaOH, HCl etc.
Adsorbable organic halides (AOX)
The major problems of the wastewater are highly toxicity, corrosivity, high organic content,
dark brown coloration due to dissolved lignin.
7. Solid waste :
Inorganic waste like lime mud, lime slaker grits, green liquor dregs, boiler and furnace ash,
scrubber sludges, wood processing residuals & wastewater treatment sludges.
Wastewater treatment sludges have a significant concern for the environment because of
including chlorinated compounds.
Gaseous emissions :
Particulates
Nitrogen oxides
Volatile organic compounds (VOCs)
Sulphur oxides
8. • Water conservation
• Waste water management
• Utilization of treated effluent
• Rain water harvesting
• Lime mud management
• Air pollution control measures
• Use of wood waste i.e. Veneer waste, Rolla, etc.
STEPS FOR ENVIRONMENTAL IMPROVEMENTS
14. INNOVATIVE PROJECTS
Use of treated effluent in the Jet Condenser in the Chemical House for vacuum generation
and recirculation of used treated effluent back to ETP.
The requirement of treated effluent for Jet Condenser is 4800 m3/day.
Vacuum Pump
Vacuum generation : 625 mm of Hg
Designed - Fresh water requirement : 240 m3/hr.
Actual - Fresh water consumption : 200 m3/hr.
Since, fresh water has been replaced with treated effluent Therefore, Saving in terms of
money : Rs.28.0 lac/annum
By the use of treated effluent, there is a scaling inside the pump and it is being cleaned
mechanically after every four months during the planned shut.