Accepted Papers - 3.pdf - UNESCO

National Seminar on Rainwater Harvesting and Water Management 11-12 Nov. 2006, Nagpur
74. Managing Water Resources - Experience at Captive Power Plant
of M/s NALCO
Horse and carriage, love and marriage,
water and energy are as intimately linked in all
phases of their existence as any other couple.
Separately, water and energy have much in
common. Each is an essential input for
productive, comfortable and healthy human
societies. Both are also derived from natural
resources, and their uses by humans create a
series of impacts on the sustainability of
ecosystems. Together, water and energy are also
closely connected, based on two fundamental
truths: Energy is Required to Make Use of Water
& Water is Needed to Make Use of Energy. In
many places, it is clear that vicious cycle of
inefficiency in the management of either water
or energy resources exacerbate shortages, waste
and unsustainable patterns of use in the other.
In the consumption of water to generate electrical
power, power plant inefficiencies or lack of
mitigation measures result in wasted water and
greater degradation of water and other
environmental resources. NALCO, which has
always stood by sustainable development,
envisages water as a precious gift of nature. In
the power stations of NALCO at CPP, systematic
steps have been taken through ISO9000,1400
and OHSAS-18000 to preserve & conserve water
by minimising wastage of water. Depending on
the nature of requirement, water has been graded
i.e. DM water, clarified water, ash slurry makeup
water, service water etc .and the consumption
is benchmarked. Stringent measures were also
taken in each system to avoid leakages and
wastages. The ethos thus has been to manage
and optimize the utility of this precious natural
resource – water.
*P. K. Pattanaik **A. K. Mohapatra
Introduction
National Aluminum Company Limited
(NALCO) is a 3.45 Million Tonne per annum
aluminum producer. To produce such a huge quantity
of aluminum, the power requirement is in the tune of
720 MW. The Captive Power plant, installed at
Angul, Orissa has an installed capacity of 960 MW
to supply uninterrupted power to smelter. For this
purpose, water is taken from river The Brahmani,
which is located at a distance of 11 KM. The water
intake requirements for the power plant is 6900 -
7000 M 3 / Hr with 7 units running. Typical one time
water requirement is as follows:-
3075 - 3100 M 3 /hr………Ash disposal to ash pond
2225- 2250 M 3 /hr………Cooling tower make up
780 - 800 M 3 /hr…………Smelter and township
445 - 450 M 3 /hr………Service water
65 - 70 M 3 /hr…………Drinking water
55 - 60 M 3 /hr…………DM water
60 - 65 M 3 /hr…………Rural Water Supply to
near by village
50 - 55 M 3 / hr…………Coal yard Management
quenching
145 - 150 M 3 /hr…………Transit, production &
other system loss
NALCO, CPP has taken initiative for reduction
of water consumption and to avoid environmental
pollution. For the same, comprehensive water
management strategies were taken to recycle back
the effluents after proper treatment for use in areas
of less importance and thus reducing the
requirement of raw water consumption by 44%.
Total 3090 M 3 /hr water is recycled back. The
*Dy General Manager ( Mech) **Chief Manager ( Mech)
Captive Power plant ,National Aluminum Company limited,Angul
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