EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
EXECUTIVE SUMMARY
PROJECT BACKGROUND
DB power (Madhya Pradesh) Limited a fully-owned subsidiary of Bhaskar Group
proposes to develop a coal based super critical 2x660 MW Thermal Power Plant at
Tehsil- Deosar, District- Singrauli in the state of Madhya Pradesh due to its proximity to
coal, rail and water. The site is surrounded by villages Gorgi, Pepal, Mahuagaon and
Chhamruch. The plant is planned to be set-up as an independent power producer
which will sell power to state distribution and power trading companies. Total land
requirement of the project is around 1200 acres.
The coal for the project will be sourced from Northern Coal Fields. The location is well
connected by railway route through Katni-Singrauli main Rail Line. Water for the
project will be drawn from Gopad River flowing at distance of 1.5 kms from the
project site.
PURPOSE OF THE STUDY
As per New Environmental Impact Assessment Notification dated 14th September
2006, establishment of new power plants above 500MW requires Environmental
Clearance (EC) from MoEF as category ‘A’ project before the commencement of
ground activity.
D B Power (Madhya Pradesh) Limited has appointed GIS Enabled Environment and
Neo-graphic Centre, Ghaziabad, Uttar Pradesh to prepare the Environment Impact
Assessment report for the proposed 2x660 MW coal-based Thermal Power Plant and
to facilitate environment clearance for the same from Ministry of Environment and
Forest (MoEF), Govt. of India.
In line with the EIA notification 2006, Terms of Reference (TOR) for the proposed plant
was issued by Expert Appraisal Committee for Environmental Appraisal of Thermal
Power .
The purpose of the report is to integrate different environmental factors into project
planning and decision making by studying probable changes in the various socioeconomic and bio-physical characteristics, which will result from the proposed
project, so as to achieve ecologically sustainable development. The purpose of the
study is to identify environmental risks, reduce conflicts by promoting community
participation, minimize adverse Environmental Impacts and keep decision makers
informed thus laying base for environmentally sound project, such that the benefits
shall be observed at all the stages of the Project starting from conceptualization to
planning, design, construction, operation and decommissioning.
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
LOCATION OF THE PROJECT
The project site is surrounded by the villages Gorgi, Pepal, Mahuagaon and
Chhamrachh and located in district Singrauli of Madhya Pradesh State. The total
land requirement for this project is 1200 acres. The details of Project location are
depicted in Table 1 and shown in Figure 1
Table 1.1: Location of the Project Site
Features
State
Madhya Pradesh
District
Singrauli
Tehsil
Deosar
Surrounded Villages
Gorgi, Pepal, Mahuagaon and Chhamrachh
Ground level consist of more than 50% Scrub
Nature of the Area
and Barren Land
Project Coordinates
Latitude- 24º07’01.9” N
Project Site Co-ordinates
Longitude- 81º55’18.5” E
Geological & Meteorological Features
Altitude
350 m above MSL
Seismicity
Seismic Zone- II
Nearby Locations
Nearest Railway Station
Niwas– 6 kms
Nearest Air Port
Varanasi- 170 kms
Nearest Water body
Gopad River- 1.5 kms
Nearest Road
Village road is passing near the Plant Site
Nearest Highway
National Highway 75E- 30 kms
Nearest Town
Sidhi- 35 kms.
Ecologically sensitive zones like Wildlife No Ecologically Sensitive Area is within 10 km
Sanctuaries, National Parks or biosphere
radius
No Archeological Monuments within 10 km
Archaeological monuments
radius
No homestead displacement is proposed at
Socio-economic factors
the project site
PROCESS DESCRIPTION
In a Thermal Power Plant, the chemical energy of the fuel (coal) is first converted
into thermal energy (during combustion), which is then converted into mechanical
energy (through a turbine) and finally into electrical energy (through a generator).
The plant configuration is 2 x 660 MW. The commercial operation date (COD) of the
first unit is envisaged in 42 months and other unit at 3-month interval thereafter. The
complete plant shall be under commercial operation within 45 months from the
date of financial closure.
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
PROJECT FEATURES
The brief outline of the features of the plant and allied information are given in Table
2
Table -2 Project Features
Item
Location of the Plant
Co-ordinate
Net capacity
No. of Units and configuration
Technology
Pressure at SH Outlet
Temperature at SH Outlet
Steam Temp at Reheater Outlet (min)
Turbo Generator
Turbine Throttle Steam Pressure
Turbine throttle main steam/ Reheat steam
temp (min)
Generator
Turbine Speed
Fuels
Main Fuel: Coal
Stacks
No. of Stacks
Stack Height (meter)
No. of flue
Additional equipment (attachment)
Water
Annual requirement
Cooling System
Total Discharge
Main Design Parameters
Tehsil- Deosar,
District Singrauli,
State- Madhya Pradesh
Plant Site: (Figure 2.2)
24º07’01.9” N
81º55’18.5” E
Ash Pond:
1320 MW
2 x 660 MW
Super Critical
258 kg /cm2
571°C
568°C
247 kg/cm2
566°C / 566°C
660 MW (each unit)
3000rpm
Requirement – 7.652 MTPA
Source- Northern Coal Field and
Grade - "E/F" Grade,
Avg. GCV- 3400 KCal/Kg
1
275
2
Electrostatic Precipitator
Low NOX burners
55MCM
Induced draft cooling system proposed
Minimum
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
LOCATION OF THE PROJECT
The proposed site is located in Deosar Tehsil, District Singruali, Madhya Pradesh. The
site is surrounded by four villages namely Gorgi, Papal, Mahuagaon and
Chhamrachh. Site is well accessible by all weather motorable village roads. It is also
well connected by Katni-Sidhi main rail line. These roads and rail line can also be
used for transporting the construction materials and TPP equipments to the site
during construction.
The general conditions applicable to set up a Thermal Power Plant have been
adhered to while selecting the present site. The location of the proposed plant is not
within 10 km radius from the outer periphery of the following:
• Metropolitan Cities
• National Park and wildlife sanctuaries.
• Ecologically sensitive areas like tropical forests, important lakes, coastal areas rich in coral
formation, etc.
• The chimney does not fall in the landing funnel of nearest airport at Varanasi (170 km).
• The site is not in the vicinity (10 km) of places of archaeological, religious or tourist
importance.
Land
For a thermal power plant, land is required mainly for the main plant area including
input storage areas i.e. coal and water, land for ash disposal, residential township
and other requirements such as the corridor for access roads, water pipeline routes,
ash disposal routes, transmission corridors etc. The total land required for setting up
the 1320 MW plant is 1200 acres including power plant and all its auxiliary systems,
ash disposal area and colony Accordingly, the area break-up details for the project
are given in Table 3
Table 3: Area Break-up Details
S. No.
1.
2.
3.
4.
5.
Particulars
Land for Plant
Ash Disposal Area
Green Belt
Staff Township
Miscellaneous
(Offices,
Stores
Infrstructures)
Total
and
Other
Area (in Acres)
345
337
359
59
100
1200
Four villages, namely Gorgi, Papal, Mahuagaon and Chhamrachh will be affected
by the project. However, no homestead displacement is expected. Only Land
Oustees are going to be affected by the project. The Rehabilitation and
Resettlement of these PAHs will be as per the Madhya Pradesh R&R Policy, 2002.
While planning, utmost care has been taken to acquire minimum land for the
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
project. The plant will be located in such a manner so as to minimize disturbance of
the villagers.
Water
Water requirement of the proposed plant will be met through Gopad river. The plant
water requirement is estimated to be 55 MCM per annum. A suitable reservoir will be
made on river Gopad to cater the water requirement during lean period. The water
will be transported through a dedicated pipeline of about 1400 mm OD with pump
house at the source and adequate number of pumping stations.
A water reservoir for 15 days storage is proposed in the site to meet the water
requirement of the plant. Land allocated for the water reservoir is about 60 acre and
it will be located within the plant site. This is required due to the scarcity of water in
this region and to ensure that there is continual operation of the plant.
Table 4: Water Requirements
S. No.
Item
1.
2.
3.
CW/ Service system make up
Plant facilities make up/ Potable water
Evaporation loss
Total water requirement
Estimated Quantity
m3/day
5307
120888
353
8472
1990
47760
6944
166666
m3/hr
Fuel Requirement, Availability and Transportation
Coal
Coal for the project would be indigenous and will be sourced from Northern Coal
Fields on long term basis. The company is also in the process of applying for
allotment for more coal blocks in the surroundings. The coal requirement considering
a GCV of 3400 Kcal/kg will be about 7.652 MTPA. The coal analysis is given in
Table 5.
Table 5: Coal Analysis
Parameter
Proximate Analysis ( As Received)
Total Moisture
Ash
VM
Fixed Carbon
Ultimate Analysis ( Equilibrium basis)
Carbon
Hydrogen
Nitrogen
Oxygen
Values
11.9 %
11.9 %
41.5 %
22 %
24.5
37.5%
2.1%
0.9%
5.6%
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Parameter
Sulphur
HGI
GCV
AFT
Executive
summa
summary
Values
0.4%
50
3300 Kcal/Kg
1200 OC
Coal Transportation and Handling System
The coal extracted from the linkage coal block (NCL) or captive coal block will be
transported to the nearest railway station on the existing Katni- Sidhi main railway line
through Indian Railways network. For the project, the envisaged mode of coal
transportation from the coalmines to the Niwas Rly Station is by Indian Railway
system in BOX-N wagons. The route will be finalized based on the detailed coal
transportation study under progress.
From this Railway station, the coal will be transported up to the plant site either by
road or conveyor belt depending upon the viability of either of the options.
Company will also study the feasibility of merry-go-round (MGR) system for
transporting coal to the power plant site. The length of MGR or conveyor belt will be
between 6-8 kms.
Coal received at power plant shall be conveyed to the crusher house for sizing of
coal to (-) 20mm. From the crusher house, the crushed coal can either be conveyed
directly to the coal bunkers through a series of conveyors or stacked on to the
crushed coal stockpiles by means of reversible stacker / reclaimer. 02 numbers of
stacker cum reclaimers are envisaged. Coal stockyards shall have crushed coal
storage equivalent to 15 days coal consumption at 100% PLF. Dust suppression and
service water system shall be provided throughout the coal handling plant. A
centralized main CHP control room shall be provided to control and monitor the
operations of the entire coal handling system.
Auxiliary Fuel
Light Diesel oil (LDO) will be used as an auxiliary fuel. LDO will be used for cold startup. The requirement of fuel oil has been estimated to be 2200KL/annum. The
secondary fuel will be transported using rake load. The analysis of LDO is given in
Table 6.
Table 6: Analysis of LDO and HFO
S. No.
1.
2.
3.
4.
5.
Parameters
Specification
Acidity (Inorganic)
Ash Content
Flash Point (Pensky-Martens, closed)
Pour Point (Winter)
Pour Point (Summer)
LDO
Values
IS-1460 (Latest Revision)
Nil
0.02% (max.) by weight
66° C
12° C
18° C
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
S. No.
6.
7.
8.
9.
10.
11.
12.
Parameters
Kinematic Viscosity at 38° C
Sediment by weight
Water content by volume
Sulphur by weight
Carbon Residue (Rams bottom) by
weight
Gross Calorific Value
Specific gravity
Executive
summa
summary
LDO
Values
2.5 to 15.7 Centistokes
0.10% (maximum)
0.25% (maximum)
1.8% (maximum)
1.5% (maximum)
10,500 Kcal/kg.
0.85 at 15° C
Power Evacuation
The power evacuation from the power station switchyard will be at 400KV. The
evacuation of the power can be done by connecting it to the pooling station of
PGCIL. Part of the power will be evacuated by state grid at power plant’s
generation switchyard which shall be utilized for transfer of power across the state of
Madhya Pradesh.
Project Cost
The total cost of the project including all facilities is estimated to be INR 6238 Crores.
PLANT WATER SYSTEM
The total estimated water requirement for the proposed TPP shall be around
6944 cum/hr for both the units. As discussed earlier, water requirement for the station
is proposed to be drawn from Gopad River flowing at a distance of 1.5 km from
plant site. Run-off the river is adequate to support a Thermal Power Generation of
the required capacity. Flow in the River however dwindles down in the month of
May. However the past records indicate that last ten days of May is the most critical
period in the year. To be on the safer side therefore, it has been proposed that a
suitable storage may be created by constructing a low barrage on River Gopad for
augmenting availability of water during the lean period.
With the water quality available, water treatment plant would comprise clariflocculation, sand bed filtration and demineralization. The station would deploy
recirculating cooling water system using cooling towers. A cycle of concentration of
4.0 will be considered for the CW circuit. Appropriate acidulation and chemical
dozing shall be adopted for this purpose.
While utmost care has been taken to maximize the recycle/ reuse of effluents and
minimize effluent quantity. The total quantity of treated effluent to be discharged
from proposed TPP would be about 40 m3/hr (5%) of makeup water requirement). In
addition to the systems described above, the oily wastes from fuel oil handling area
and main plant area shall be treated using oil water separator and the treated
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
water shall be led to the tube settler provided for service water waste for further
treatment and reuse in service water system.
Effluent Disposal
The provisions like Ash Water Recirculation Systems (AWRS), Effluent Treatment Plants
(ETP), Sewage Treatment Plants (STP) and Closed Cycle CW Systems will ensure that
most of the treated effluent is reused inside the plant. Further, implementation of
Zero discharge has been explored. This requires consumption of an exorbitantly large
quantity of raw water to make high TDS discharge water usable with in the system.
The use of discharge water of the order of 40 m3/hr for any other purpose like
horticulture and green belt development is not possible as these were already
considered in reuse and recycling. In-view of this and based on available
technology feasibility of zero effluent discharge is not considered.
All the treated effluents would be discharged through a single point outlet from
Central Monitoring Basin (CMB) / Guard Pond to nearby natural drain.
PLANT CONFIGURATION AND LAYOUT
The layout of the main plant along with all auxiliary system for the proposed 2x660
MW TPP has been shown in the site layout plan.
In planning out of the various facilities, consideration has been given to the following
general principles:
• Least disturbance to existing habitation and vegetation, if any;
• Flexibility to have future expansion of unit with particular reference to the switch yard;
• Predominant wind directions as gathered from the wind rose to minimize pollution, fire risk,
etc;
• Raw water intake facilities;
• Approach road to the power plant from the main highway;
• Availability of adequate space for fabrication / construction equipment; and
• Availability of adequate space for labour colony during construction stage.
All facilities of the plant are laid out in close proximity to each other to the extent
practicable to accommodate them efficiently within the plant boundary.
ASH HANDLING SYSTEM
It is estimated that the total ash to be generated with coal having 45% ash content is
393 TPH. Out of this, 314.5 TPH of fly ash and 78.5 TPH of bottom ash will be
generated. Ash handling plant will consist of bottom ash and fly ash handling
systems.
Bottom Ash Handling System
Bottom ash collected in the bottom ash hopper below the boiler furnaces would be
conveyed by scraper conveyors/ Clinker Grinder-Jet pump up to the bottom ash
slurry pump house for further disposal in wet form.
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
Fly Ash (FA) handling system
The Fly ash collected in the ESP shall be evacuated through vacuum pump in dry
form to a Collector tank. From the collector tank the fly ash shall be disposed off in
dry form. In case of emergency, the fly ash from the collector tank could be
disposed off in wet / slurry form through Ash slurry pump house. The fly ash from
collector tank / buffer hopper would be conveyed pneumatically to FA
intermediate storage silos and then to the Final silos. The air would be vented out to
atmosphere after passing the same through bag filters to mitigate the environmental
pollution. The dry fly ash collected in fly ash silos would be disposed off in dry form
through container trucks, Railway wagons or any other means. The final fly ash silos
would also be located within the plant boundary.
ASH POND
Assuming the plant to operate at MCR conditions, about 10.3 M cum of ash (bottom
and fly ash) is expected to be produced in 3 years. As per MOEF guidelines, 100% of
fly ash shall be utilised after first 3 years period. Accordingly, about 10.3 M cum of
ash can be disposed off in the dyke.
About 337 acres of land is identified for ash disposal. Therefore, for developing 10.3
M cum of storage capacity, a dyke upto 15 m (max.) height will be required.
ASH UTILIZATION PLAN
In order to meet the requirement of Gazette Notification for Ash utilization following
actions is proposed.
• The company shall provide system for 100% extraction of dry fly ash along with suitable
storage facilities. This will ensure availability of dry fly ash required for manufacture of Fly
Ash based Portland Pozzolana Cement (FAPPC), asbestos cement products; ash based
building products and other uses of ash.
• All out efforts shall be made to motivate and encourage entrepreneurs to set up ash
based building products such as fly ash bricks / blocks etc.
With all the efforts mentioned above, it is expected that fly ash generated at the
thermal power stations shall be utilized in the areas of cement, concrete and
asbestos cement products manufacturing, bricks manufacturing, road construction,
low lying area filling etc. However, in order to prepare realistic road map for 100%
Ash utilization, a detailed market study shall be carried out.
Based on
recommendations of the study, detailed road map for 100% Ash Utilization in line
with MoEF Gazette Notification shall be prepared and submitted to regulatory
authorities.
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
FIRE DETECTION / ALARM AND FIRE PROOF SEALING SYSTEM
A comprehensive fire detection and protection system is envisaged for the
complete power station. This system shall generally conform to the
recommendations of TAC (INDIA)/ IS: 3034 and NFPA- 850. The following fire
detection and protection systems are envisaged:• Hydrant system for complete power plant covering the entire power station including all
the auxiliaries and buildings in the plant area. The system shall be complete with piping,
hydrants, valves, instrumentation, hoses, nozzles, hose boxes/stations etc.
• Automatic high velocity water spray system for all transformers located in transformer yard
and those of rating 10MVA and above located within the boundary limits of plant, main
and unit turbine oil tanks and purifier, lube oil piping (zoned) in turbine area, generator
seal oil system, lube oil system for turbine driven boiler feed pumps, consisting of detectors,
deluge valves, projectors, valves, piping, instrumentation etc.
• Automatic medium velocity water spray system for cable vaults and cable galleries of
main plant, switchyard control room, CHP control room and ESP control room consisting of
smoke detectors, linear heat sensing cable detectors, deluge valves, isolation valves,
piping, instrumentation, etc.
• Automatic medium velocity water spray system for coal conveyors, coal galleries, transfer
points and crusher house consisting of QB detectors, linear heat sensing cables, deluge
valves, nozzles, piping, instrumentation, etc.
• Automatic medium velocity water spray system for un-insulated fuel oil tanks storing fuel
oil having flash point 65ºC and below consisting of QB detectors, deluge valves, nozzles,
piping, instrumentation, etc.
• Foam injection system for fuel oil / storage tanks consisting of foam concentrate tanks,
foam pumps, in-line inductors, valves, piping & instrumentation etc.
• For protection of control room, equipment room, computer room and other electrical and
electronic equipment rooms, Inert Gas extinguishing system as per NFPA-2001 would be
opted.
• Fire Detection and Alarm System - A computerized analogue, addressable type early
warning system shall be provided to cover the complete power plant. Following types of
fire detection shall be employed.
o Multi-sensor type smoke detection system and photo electric type smoke detection
system.
o Combination of both Multi-sensor type and photo electric type smoke detection
systems.
o Linear heat sensing cable detector.
o Quartzoid bulb heat detection system.
o Infra red type heat detectors.
o Portable and mobile extinguishers, such as pressurized water type, carbon-dioxide
type, foam type, dry chemical powder type, will be located at strategic locations
throughout the plant.
• Required fire engines and fire station equipments shall be provided.
• Complete instrumentation and control system for the entire fire detection and protection
system shall be provided for safe operation of the complete system.
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
Executive
summa
summary
POLLUTION CONTROL
Air Pollution Control Measures
Coal consumption in furnace generates suspended particulate matter, sulphur dioxide (SO2) and oxides of nitrogen (NOX) as main air pollutants. Various systems to
control air pollution from the combustion of coal are as follows.
• Electrostatic Precipitator: It is proposed to install high efficiency electrostatic precipitator
having an efficiency that limits the outlet emission to 100 mg/Nm3. To ensure the safe and
optimum operation of the ESP’s, each stream of precipitator would be supervised and
monitored by a separate microprocessor based rapper control EP Management System
(EPMS). It would also monitor and display the status of ESP stream.
• NOX Control System: For obtaining the sustained high efficiency and availability of the
boiler, it shall be designed for low NOX formation by adopting the appropriate burners.
• Chimney: One bi-flue chimney of 275 metre height of reinforced concrete shall be
provided to facilitate wider dispersion of SO2, NOX and particulate matters after ESP.
• Coal Dust Suppression System: For the control of fugitive dust emission within and around
the coal handling plant, coal dust extraction and suppression systems would be provided.
Dust suppression system would be installed at all the transfer points in CHP and at coal
stockyard. Dust extraction system would be provided in crusher house.
Water Pollution Control Systems
An effluent management scheme would be implemented with the objective of
optimization of various water systems so as to reduce intake water requirement
which would result in lesser waste water discharge. The effluent management
scheme would essentially involve collection, treatment and recirculation / disposal
of various effluents. Adequate treatment facilities would be provided to all the waste
streams emanating from the power plant to control water pollution. This would
include cooling towers to control thermal pollution and physico-chemical and
biological treatment for other effluents. Efficient operation of these treatment plants
would be ensured so that the quality of effluents conforms to the relevant standards,
prescribed by the Regulatory Agencies. All the treated effluents would be
discharged through a single point outlet from Central Monitoring Basin (CMB).
The effluents from the project can be broadly classified into the following broad
categories:
• Thermal discharges from Condenser cooling water.
• Miscellaneous wastes like Coal Handling Plant waste, Service Waste Water, Oily Waste
Water and DM Waste Water.
• Effluent from ash pond.
• Sanitary waste from plant and township.
The treatment proposed for the above effluents is briefly discussed below:
• Condenser Cooling System: A closed cycle recirculating condenser cooling system with
cooling towers is envisaged to minimise thermal discharges from the plant. However,
13-13
EIA STUDY
for 1320MW Coal Based Super-critical Thermal Power
Plant at Deosar, District Singrauli, Madhya Pradesh
Project ProponentProponent- DB Power (Madhya Pradesh) Limited
•
•
•
•
•
Executive
summa
summary
periodic blow down from the system would have to be resorted to avoid build-up of TDS.
The blow down would be used for ash handling system and excess would be sent to the
Central Monitoring Basin (CMB) / Guard Pond for dilution and disposal.
Oil Separator for Oily Wastes: Oil separator will be provided to trap oils from effluents
arising from oil handling area.
Service Waste Water: The service water effluent drains shall be separately routed to a
sump and treated in plate separator/ tube settler for treatment of suspended solids. The
treated service water would be discharged through the main plant drain to CMB.
Neutralization Pit: DM Plant effluents will be neutralized in neutralization pit before routing
to the Central Monitoring Basin (CMB)
A Central Monitoring Basin / Guard Pond would be constructed to facilitate mixing and
dilution to all the above wastes before final discharge.
Sewage Treatment Plant for Sanitary Wastes from Plant and Township: The sewage from
plant and township would be treated in a sewage treatment plant. It would be provided
with extended aeration system to control BOD and suspended solids.
Noise Control
The major noise generating sources in a thermal power plant are the turbines, turbogenerators, compressors, pumps, fans, coal handling plant etc. from where noise is
continuously generated. Acoustic enclosures shall be provided wherever required
to control the noise level below 90 dB(A).
Solid Waste Management Systems
Ash Management
Ash (Fly Ash & Bottom Ash) is the main solid waste from coal based thermal power
plants. The ash handling and disposal systems have been described in Section 2.6
and ash utilization plan has been described in Section 2.7.
Management of Mill Rejects
Mill rejects will be reused within the plant or sold to out side industries for use (e.g.
brick kilns). Unused mill rejects will be disposed off in reject yard.
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