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POLLUTION IN POWER PLANT

AIR

WATER SOUND

SOLID WASTE

HAZARDOUS WASTE

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PARAMETERS MONITORED

SPM

RSPM SOx

NOx

AIR POLLUTION

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SOURCE MONITORING

THERMAL STACK SPM, SOx & NOx

GAS STACK NOx

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METHODOLOGY FOR TESTING

SPM ISOKINETIC METHOD USING

HIGH VOLUME SAMPLER

NOX PDA METOD

SOX SPECTROMETRICALLY

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2

1

S.NO

100150200 MW &ABOVE

150350600< 200 MW

PROTECTED

mg/NM3

AFTER1979mg/NM3

OLD

mg/NM3UNITCAPACITY

SPM EMMISION STANDARDS FORTHERMAL POWER PLANT

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AMBIENT AIR QUALITY LIMITS

C

B

10003030100SENSITIVE

20008080200RESIDENTIAL &

RURAL

5000120120500INDUSTRIAL &MIXED USE

A

CONOxSO2SPM

CONC. IN MICROGRAM/M3

CATEGORYAREA

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NOX EMMISSION

400MW& ABOVE------50.0 PPM ON N.G

100.0 PPM ON NAPTHA

100-400MW--------75.0 PPM ON N.G

100.0 PPM ON NAPTHA

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WASTE WATER FROM A THERMALPOWER PLANT

BLOW DOWN FROM CONDENSER CWSYSTEM.

NEUTRALISED WASTE FROM DM PLANT &SOFTENING PLANT.

EFFLUENTS WITH HIGH TOTAL DISSOLVEDSOLIDS (TDS)

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EFFLUENTS WITH HIGH TOTAL SUSPENDEDSOLIDS (TSS)

COAL HANDLING PLANT

SERVICE WATER SYSTEM WASTE.

SLUDGE FROM PT PLANTBACKWASH WASTE WATER OF GRAVITY

FILTER & SOFTENING PLANT.

EFFLUENTS HAVING HIGH OIL CONTENT

OILY WASTE FROM FUEL OIL HANDLING

SYSTEM & OTHER OIL HANDLING AREAS.

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EFFLUENTS HAVING HIGH TEMPERATURE

BOILER BLOW-DOWN WATER

RETURN WATER OF CONDENSER COOLING

SYSTEMS IN PLANTS OPERATING ON ONCETHROUGH TYPE CIRCULATING WATERSYSTEM.

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PRESENT PRACTICE

TREATMENT FOR HIGH TDS WATER

Various systems designed to operate in a manner

that effluents from single systems when mixed

together at final disposal point meets the statutorylimits.

Circulating water & ash water recirculation system

are designed to operate with low or moderate COC tokeep TDS within limits in final effluent.

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TREATMENT FOR HIGH TSS WATER

Water with high TSS is recycled/reused in othersystems e.g. filter backwash waste is recycled back tothe clarifier.

Where reuse/recycle is not feasible, the treatmentfacility with setting ponds, tube settler/lamellaclarifier, centrifuge/filter press are being provided.

Dried sludge cake is used for land-fill and clear wateris recycled/reused.

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TREATMENT FOR HIGH OIL CONTENT WATER

Effluent is treated to remove oil using an oil separatorto keep the oil content of the effluent below thestatutory (10ppm) limit.

Clear water is recycled or disposed off from the plant.

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EFFLUENTS HAVING HIGH TEMPERATURE

The major effluent is the return water from thecondenser cooling systems in plants operating on oncethrough type circulating water system.

In recirculating type system using cooling towers ,

blow-down from the system is taken from the cold side

thereby eliminating the need for reducing the

temperature of the effluent prior to discharge.

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BOILERBLOW-DOWN

Negligible quantity Disposed off after mixing with other effluents or reused

in the water pretreatment plant/ash water system asmakeup.

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ENVIRONMENT LAB

THANKS