chapter - 1 introduction - Meghalaya State Pollution Control Board

Hills Cement Co. Limited.
5.4 LIMITING CO 2 EMISSIONS
The measures in this regard fall broadly under process modification and
Product modification.
a) Process modification
Process modification measures include substitution of coal by lower
carbon fuels like lignite and natural gas, use of washed coal, improved
kilns, multiple-stage preheater, precalciners, cogeneration, etc.
Noteworthy of mention is afforestation and planting of trees in the
plants' environs by many cement plants; these act like a "sink" for
GHG's.
b) Product modification.
Product modification, on the other hand, includes blended cement
manufacture and increased use of pozzolana in concrete. This is
recognized as the most cost effective emission reduction method.
Each tonne of pozzolana or cementation material used reduces CO 2
emissions by one tonne.
The exemplary measures of ecological conservation adopted by
cement plants in their limestone mines have received repeated
acclamation from institutions like Indian Bureau of Mines.
5.5 NOISE POLLUTION
Noise generation during construction phase will be due to the operation of
heavy equipments and increased frequency of vehicular traffic in the area.
The nearest habitation is at a distance of 1-km. Hence the noise generated
will be diffused by the natural obstructions and with distance. On-site workers
will be provided earmuffs. As far as possible noise prone activities will be
restricted during night (10 pm to 6 am).
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