Financial Daily from THE HINDU group of publications
Thursday, Feb 12, 2004
Financial Daily from THE HINDU group of publications Thursday, Feb 12, 2004 |
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Corporate
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Environment Industry & Economy - Non-conventional Energy Hindustan Paper plans to convert wastes into energy Badal Sanyal
Kolkata , Feb. 11 HINDUSTAN Paper Corporation (HPC) has initiated a move to generate power, although in a limited way, at its Nagaon Paper Mill (NPM) in Assam, utilising mill wastes including fly ash along with coal fines. The objective is to use entire dry fly ash having un-burnt coal and bamboo dust. The company has identified fluidised bed boiler technology for this purpose. NPM generates about 130 tonnes of coal ash from its captive thermal power plant and the entire ash is being utilised for road building in nearby areas, filling low lying areas, supplying to railways on request and a small portion of fly ash is lifted by local cement and brick manufacturers free of cost as per the directive of the Union Ministry of Environment and Forest. According to company sources, a detail action plan has been prepared towards utilisation of the fly ash by 2008. Meanwhile, with close monitoring and better operation and control, ash generation from each tonne of paper produced is planned to be gradually brought down compared to earlier years. In fact, total ash generation has already come down from 542 kg per tonne of paper in 1998-99 to 369 kg up to October 2003. Since bamboo dust is having a very high energy potential, HPC has approached Indian Institute of Science, Bangalore, for consultancy service so that a project can be initiated for recovery of energy from bamboo dust. At present, dust is sold at very nominal price to a local party who is using this for making particleboards and also as domestic fuel. It is stated that an effective solid waste management plan has been prepared at NPM as per the directives of the Union Ministry of Environment to deal with the problems arising out of huge generation of solid wastes such as lime mud, bamboo dust and coal ash. The utilisation of wastes is expected to be improved once the proposed lime sludge re-burning plant is commissioned by March 2005. Mercury being one of the major environmental pollutants in caustic and chlorine operation in a paper mill, time targeted action plans such as recycling of mercury bearing liquid effluent, mercury distillation unit, reduction of mercury in caustic and hydrogen have been chalked out to contain it in the plant itself to achieve the permissible limits.
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