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RInfra - Business Responsibility Reporting - Our Performance - Environmental Performance
Dahanu Power Station
All the plant emission parameters are well below statutory limits. Both the Flue Gas De-sulphurisation units were in service throughout the year with SOx absorption more than 90% as stipulated. DTPS is Complying with Fly Ash Notification issued by MoEF.
Emission Parameters at Dahanu Thermal Power Station
|1||Total Particulate Matter(TPM)||mg/Nm3||150||46.15||45.7||44.5|
|2||Sulphur Dioxide (SO2)||TPD||8.04||4.2||3.7||4.2|
|3||NOx (ppm) at 15% excess oxygen v/v||PPM||150||69.3||68.5||55.4|
|Ambient air outside plant premises|
|3||Sulphur Dioxide (SO2)||µg/M3||20||4.6||4.8||5.5|
|4||Oxides of Nitrogen(NOx)||µg/M3||30||15.56||14.8||14.7|
|MPCB : Maharashtra Pollution Control Board |
UOM:Unit of measurement.
Samalkot Power Station
The 220 MW combined cycle Samalkot power station of the Company uses natural gas, an environment friendly fuel, as the primary fuel and naphtha/HSD as the secondary fuel. A dedicated Environment, Health and Safety Manager is assigned with the responsibility of supervising, monitoring and ensuring necessary action with regard to environmental issues, at the power station. The average levels of emission recorded at the power station during the year 2013-14 were much below the limits by the Andhra Pradesh Pollution Control Board. The Station is certified for ISO 14001 and OHSAS 18001. The power station also carries out regular mock drills on disaster management.
Zero Discharges of Industrial Effluents for the past 90 months in a row is one of the major milestone of the power station which is achieved by using "Reduce, Recycle and Reuse" concepts (achieved through the recovery of Steam and Water Analysis System as well as higher Cycle of Concentration (COC) operation of Cooling Water Systems. )
Emission Parameters at Samalkot Power Station
|Sr. No.||Parameters||UOM||APPCB* Limits||2014-15||2015-16||2016-17|
|1||Particulate Matter in ambient air - PM 10||µg/m3||100||57.81||57.68||58.90|
|2||Particulate Matter in ambient air - PM 2.5||µg/m3||60||20.12||24.277||22.00|
|3||Sulphur Dioxide (SO2) in ambient air||µg/m3||80||18.14||20.20||21.20**|
|4||Nitrogen Oxide (Stack)||PPM||75||44.75||0.00||0.00***|
* APPCB: Andhra Pradesh Pollution Control Board
** Parameter indicated is of ambient air quality which varies due to external factors. For example since 2011-12, considerable industrialization has taken place in this area. For the last three years, a coal based power plant is operational in the vicinity. The influence of the same is on the SO2 emission, However this is well within the limits.
*** Station under preservation.
Goa Power Station
The plant has taken up several initiatives towards conservation of resources and improving environmental performance. Improvement on Cycle of Concentration (COC) and reduction in average water consumption has been achieved. An area of about 1.6 hectares is covered under forestation in and around the plant premises.
Global Warming and Environment
At RInfra, planned capacity addition in next 10 years through thermal power includes significant share through non-conventional (hydro/combined cycle/super critical/gas or liquid fuel based) power projects which emits less CO2 per unit of electricity generation compared to conventional coal based thermal power plants. The Company has special interest in investing into non-conventional energy sources and aims to build power generation capacity for about 28,000 MW out of which, near 11,000 MW is planned from hydro power. Presently work for installation of total 4,200 MW of hydro power at 4 different locations is in progress.
The Dahanu Thermal Power Station (DTPS) located at Dahanu (Maharashtra), is a 500 MW conventional coal based power generation unit of RInfra. DTPS is situated about 120 km north from Mumbai on western coast line. Over 3 million household and business establishments in Mumbai suburbs are direct customers to RInfra. In the past few years, DTPS has made notable improvements in its environmental performance in key areas and successfully addressed a few environmental concerns or myths associated with coal-based power plants. For the prevention of pollution, DTPS has adopted a multi-prong approach that includes top-of-the-pipe, in-process as well as end-of-the-pipe intervention. DTPS has demonstrated its commitment for mitigation of climate change through following major voluntary initiatives:
- For improvement in generation side efficiency, DTPS has developed and implemented best operational and maintenance practices. By reducing the Heat Rate, DTPS has reduced consumption of coal which results into reduced emissions from the process.
- On consumption side, efficiency improvement, by installing variable frequency drives (VFDs) on Condensate Extraction Pumps, Seal Air Fans and Vents Fans for Ash Classification System and other electric motors, DTPS has controlled its auxiliary power consumption well below the CEA (Central Electricity Authority) norms. Reduced auxiliary power consumption resulted in lower CO2 emission.
- To mitigate the climate change, DTPS has voluntarily demonstrated its commitment through carbon sequestration approach by massive plantation of more than one crore mangroves on either bank of creeks thus protecting the creek banks from erosion and develops breeding grounds for marine life. The land on which DTPS is set up was completely barren due to salinity as high as 9 to 10 on the pH scale because most of the area was an abandoned saltpan area. The entire plant area now has sprawling green cover due to plantation of over 1.60 crore forest species, mangroves and fruit bearing species. About 250 acre land, which was earlier affected by high salinity due to intrusion of salty sea water, has been reclaimed and planted with Chiku (Achras sapota) and various other forests plant species.
Carbon Emission Control
The Company has addressed the issue of carbon emission reduction by taking measures both at generation and consumption side. DTPS, flagship thermal power plant of the company, has taken following measures:
Generation side efficiency measures
Reliance Infrastructure DTPS has achieved remarkable results since it has consistently maintained its average Unit Heat Rate, Auxiliary Power Consumption (APC), Sp. Oil consumption and DM Water consumption much lower than the national average for a unit of this size
Consumption side efficiency measures
- Installation of Variable Frequency Drive in Condensate Extraction Pumps, Coal Mill Seal Air Fans, PA Fan.
- Corrocoating of CW Pumps & ACW Pumps.
- Investing in Vapour Absorption Air Conditioning.
- Use of Energy Efficient Lighting systems.
- Use of solar street lighting.