CESC Ltd.
Sales (2007-2008) = Rs.2800 crores (rounded off)
Net profit after tax = Rs.350 crores (rounded off)
CSR Budget = Not Available
Karmayog 2008 CSR Rating: 1/ 5
CSR activities:
Environment management, in CESC, involves a comprehensive programme to improve and sustain eco-friendly operations to serve all consumers and stakeholders. The mission statement spells out the Company�s goal to be recognised as an environmentally responsive organisation. Further, for internalisation, �Social and Environmental Concern� has been identified as one of the core values. A continuous proactive endeavour is made with a view to remain at a level above the requirements of the statutes and to set its own standard in expressing concern for the society
at large.
Out of the five coal-fired power stations of CESC with a total generation capacity of 1065 MW, two are more than 50 years old and the other three are comparatively modern. They use coal in pulverised form. Modern devices for monitoring and controlling pollution have been installed in these stations. The older stations have to depend on somewhat older equipment for control of pollution, specially in respect of emission.
Management of environment is carried out mainly in the following areas:
Effluent
In a power station, effluent is generated from water treatment plant, boiler blow down, drains from heat exchangers, canteen waste water, rain water etc.
Waste water from water treatment plant is treated in neutralising pits. Boiler blow down and various other contaminated water quantities are made to pass through Efficient Treatment Plants (ETP) for separation of oil and suspended particles. Sludge water is discharged into a sludge pond for settling of sludge. Canteen waste water treatment plants have also been set up.
Finally, effluent quality is monitored and controlled to meet the effluent standards set by the Central and State Pollution control Boards, prior to discharge.Recycling of Effluents of the PF fixed power stations
Recycling of Effluents of the PF Fired power stations
CESC has embarked on a scheme for making all three Generating Stations to have ‘Zero Effluent ‘ excluding the once through cooling water. We have already progressed to an extent in this direction. At Budge Budge, the cooling tower blow down water which was previously discharged into the river is now completely recycled in the form of service water. Water from the Demineralising Plant (DM) is led to a pond after treatment and water from tank is utilized for gardening etc. Previously the water was fed to a Holding Pond where after mixing with all other effluents of the station, was discharged to the river. After extensive modification to pipe works, water from Holding Ponds is being pumped into the raw water treatment plant for reuse as processed water. The sustainabilites of the process now under observation is being ascertained with seasonal variations.
Emission
Coal, when burnt in boilers with the help of air, produces flue gas which is discharged in the atmosphere. This flue gas contains Nitrogen, Oxygen and Oxides of Carbon, Sulphur (SOx), Nitrogen (NOx), etc. It also carries the suspended ash particles (SPM). Most of these ash particles, however, get separated from the flue gas when it passes through Electrostatic Precipitators (ESP) and get collected in the hoppers as fly ash. SPM, SOx and NOx in the flue gas are monitored by the stations ,recognizes external agencies as well as by the Pollution Control Board.
CESC maintains a mobile laboratory for stack gas and ambient air monitoring,which moves between all the stations to measure and monitor stack gas and ambient air.
Solid Waste
In PF fired boilers, a major portion of the ash is collected as fly ash, in the ESP hoppers and the rest as bottom ash collected in the boiler hoppers known as Bottom Ash Hoppers.
Dry fly ash is conveyed pneumatically to ash silos from where it is unloaded, after proper moistening, on dumpers for disposal. Fugitive emission is thus controlled. Bottom ash is pumped into de-watering bins in the form of slurry. The water from the slurry is
separated by decantation and recycled to form ash slurry. This �zero discharge� system in handling bottom ash thus gives rise to no effluent at all. .
In older stations, ash from the boiler in the form of cinders is led to ash hopper where it is quenched by water and fed to ash conveyer belt by paddle ash extracter. This wet ash is conveyed to ash silos for disposal.
Cooling Water
In all power stations, except Budge Budge Generating Station, cooling water for condenser is taken from the Hoogly river and discharged back to the river without altering its quality.
Budge Budge cooling towers have been installed for cooling the condenser cooling water. A portion of this water which is blown down to maintain the water quality, is recycled to be used as service water.
Fugitive Dust
For suppression and control of fugitive emission in coal handling plant, a dust extraction system together with water spraying at transfer and unloading points has been provided. Fugitive emission tests are also carried out periodically by the authorised agents.
Noise
Intensity of noise is measured at regular intervals and records are maintained. Immediate necessary action is taken whenever the level at any place approaches the statutory levels.
Plantation
Each power station takes special care for developing and maintaining green belt along the boundary as well as in the vacant land
within the site.
Cleanliness
To keep the power stations clean and arouse competitiveness, awards for best house keeping have been introduced.
Utilization of Ash
CESC has an Ash Utilisation Division for implementation of comprehensive ash management plan on global technology search to tackle ash utilisation on short, mid-term and long-term basis.
Presently, major usages are for land reclamation, structural land filling and road making by Government and Semi-Government Bodies.
Rest is being used by local conventional brick fields . CESC is committed to supply fly ash free of cost to brick makers within 5 Km radius of the power plants and also to pay incentives to ash evacuation contractors who supply ash to users for commercial utilisation. Additionally, setting up of a centralized Ready-Mix Plant for mixing coal ash and clay (silt) Patulia near Titagarh Power Station, which would utilise ash for making bricks will commence shortly.
Stretches of road with technical guidance from the Central Road Research Institute, Govt. of India have been constructed using coal ash on experimental basis. And now considerable quantity of ash is being utilized to construct the road sub-base by Calcutta Metropolitan Development Authority for Dum dum Barackpur Highway Project, Eastern Metropolitan By-pass and also for landfill of Rajarhat New Township near Calcutta.CESC has entered into a long term agreement with Ambuja cements who utilizes the total fly-ash generated by Southern Generating station for making of cement.
Further, CESC has entered into a firm agreement with a Dutch Consortium M/s LIWAG b. v. of Netherlands to set up a coal ash based sintered light weight aggregate (LYTAG) Plant near Budge Budge Thermal Power Station, to utilise about 1000 Tonnes of coal ash daily on a long term basis.Fly-ash from Budge Budge is now being exported to Bangladesh for cement making.
CESC is in the process of introducing an eco-friendly High Concentrated Ash Slurry Disposal (HSCD) system in transportation to its emergency ash disposal area at Budge Budge Power Station. Because of very quick solidification of the slurry at the disposal site, the process offers no air or water pollution during disposal.
CESC is also utilising the services of Bidhan Chandra Krishi Viswavidyalaya, a premiere Agricultural University for utilisation of coal ash in agriculture, with an ultimate aim of developing a soil amendment for growing edible and nonedible plants. Experimental farming showed satisfactory results
ISO-14001
To strengthen the efforts, implementation of Environment Management System ISO:14001 has been initiated in Southern Generating Station which will be further extended to other units gradually.
Education and Training
To create awareness and sustain the efforts, training programmes on �Pollution Control and Environmental Monitoring in Thermal Power Stations� are being conducted regularly for all levels of employees. World Environment Day is also observed in the Generating Stations and participated by all employees, when environment- friendly tree saplings are planted.
Rewards and Recognitions
The Southern Generating Station has won the 2nd Jawaharlal Nehru Memorial Award for implementing zero discharge system. It has also won CII(ER) Safety Awards for two consecutive years.
CESC�s environmental management system focuses on continuous improvement and upgradation, with state-of-the-art principles and equipment, setting high targets and reviewing its performances. CESC recognises its responsibility towards protecting the ecology, health and safety of the employees and consumers.
Source: www.cesc.co.in/aboutus/environmanage/main.php
Contact Information:
CESC Ltd.
CESC House
Chowringhee Square
Kolkata 700 001
West Bengal
Phone No. : 033- 2225 6040
Fax : 033- 2225 5155
Email : cesc@cesc.co.in
Website : www.cesc.co.in
Industry Sector: Power Generation and Supply
Products / Services: Power Generation
Other locations of factories / offices: