Cement, Energy and Environment

Table 3 Trend of fly ash utilisation by the plant Year Fly ash consumed, tom1es Raw meal preparation PPC Manufacture Total Jan 1998 to Mar 19991999 24140 Apr 1999 to Mar 2000 24342 Apr 2000 to Mar 2001 12190 Waste water from the power plant is collected in separate tanks, neutralised and used for spraying on roads and coal gantry, wetting of fly ash, fire hydrant, gardening, etc. Oil separators have been introduced for separating the oil from the power plant effluent, vehicle wash water, etc. 16277 40417 14795 39137 16041 28231 The entire domestic effluent from the Factory Township is treated in a tertiary treatment plant and the total treated water is used in power plant cooling towers. Table 4 gi.ves the trend of use of waste water from 1995 to 2001 while Table 5 illustrates the declining trend of water consumption both by the cement plant and the captive power plant for the same period. Table 4 Trend of use of water from treated domestic sewage in captive power plant Years 1995- 96 1996-97 1997-98 1998-99 1999-2000 2000-01 Water consumed, kilolitres 102311 340950 396740 358960 406410 303340 Table 5 Declining water consumption trend Water consumed Year Cement plant Captive power plant, lih·es/kW kilolitres/ tonne 1995-96 0.250 7.69 1996-97 0.227 7.78 1997-98 0.212 6.57 1998-99 0.210 4.96 1999-2000 0.212 1.49 2000-01 0.221 0.847 1