AN OVERVIEW ON CONTINUOUS EFFLUENT QUALITY …
Transcript of AN OVERVIEW ON CONTINUOUS EFFLUENT QUALITY …
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AN OVERVIEW ON CONTINUOUS EFFLUENT
QUALITY MONITORING SYSTEM
WORKSHOP ORGANIZED BY MPCB, BHOPAL
04-06 JULY 2017
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3
Goals of Online environmental monitoring system
• Improved control over impacts on theenvironment
• Higher environmental awareness• Increased management responsibility for
regulatory compliance• Self Monitoring mechanism within the industries• Increased cost-effectiveness (minimize
inspection)• Increased public access to information(Public
Domain)
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Real-time Water Quality Monitoring
Fresh Water and Wastewater
Options In-situ and Extractive
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Advantages and Disadvantages of Flow Through Extractive System
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Advantages and Disadvantages of In-situ Monitoring System
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Instrumentation of RTEQMS
• Various equipment manufacturers in India and Abroad arecapable to supply, install, commission and operate theRTEQMS.
• Technology providers have analyser as well as sensorbased equipment's to cater to the needs of RTEQMS.
• General guidelines shall not specify the equipments andtechnology to be used for setting up of RTEQMS
• Market based system shall be governed for setting up ofRTEQMS
• Industrial units/associations shall use the equipment andservice providers based on the economics and ruggednessfor RTEQMS to last longer (say at least 5 to 8 years)
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Site Selection
• Fixing of site for installation of RTEQMS should berepresentative and in compliance to provisions ofConsent Management (notified effluent outfall withcoordinates-Global Positioning System) to assesstemporal changes in the quality of effluentdischarged from the premises of industrial unit.
• Monitoring site should be accurately displayed withwritten station location.
• Photographic evidence should be obtained in thedocumentation.
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Data Management and Quality Checks
• RTEQMS generated data should be validated according toWater Quality Criteria/Effluent Discharge Standards usingthe methodologies included in the publication of AmericanPublic Health Association on Water and Waste WaterExamination(20th Edition)
• Sensors/analyzers shall have current US EPA reference orequipment method designation and shall be of the latestdesign.
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Data Management and Quality Checks(contd.)
• Standard Operating procedure should be providedand must contain
o Operating procedures for all analyzers andsensors
o Calibration procedureso Calibration scheduleso Maintenance procedureso Maintenance scheduleso Data Transmission procedureso Data validation procedures
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General Specifications -RTEQMS
Equipment's should be capable of operating in aself-powering mode from an internal power supply(using cell batteries/alternative system) with a fullpayload at a defined sampling interval.
Equipment's should have a non-volatile flash diskmemory capable of storing individual readings for aperiod of at least one year.
Loss of power should not cause loss of memory
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pH (mV)
Parameter Technical Specification
Measuring Range 0.0 to 14 units of pH
Accuracy ≤ 0.01 units of pH
Response Time ≤ 60 seconds
Operating Temperature 0 to 40o C
Operating Humidity 5 to 95% non-condensing
Power 12 VDC Nominal
Cleaning Self-Cleaning ( Automatic )
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COD (mg/l)
Parameter Technical Specification
Measuring Range 0.0 to 500 mg/L
Accuracy ± 2% + 5 mg/L of certified
reference standard
Resolution ≤ 1 mg/L
Response Time ≤ 60 seconds
Operating Temperature 0 to 40o C
Operating Humidity 5 to 95% non-condensing
Power 12 VDC Nominal
Cleaning Self-Cleaning ( Automatic )
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BOD (mg/L)
Parameter Technical Specification
Measuring Range 0.0-50 mg/L
Resolution ≤ 1 mg/L
Response Time ≤ 60 seconds
Operating Temperature 0 to 40o C
Operating Humidity 5 to 95% non-condensing
Power 12 VDC Nominal
Cleaning Self-Cleaning ( Automatic )
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Ammonia (mg/l)
Parameter Technical Specification
Measuring Range 0.0 to 100 mg/L
Accuracy ≤ 3% of full scale
Resolution ≤ 0.1 mg / L
Response Time ≤ 60 seconds
Operating Temperature 0 to 40o C
Operating Humidity 5 to 95% non-condensing
Power 12 VDC Nominal
Cleaning Self-Cleaning ( Automatic )
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Total Suspended Solids (mg/l)
Parameter Technical Specification
Measuring Range 0.0 to 200 mg/l
Accuracy ≤ 5 mg/l
Response Time ≤ 60 seconds
Operating Temperature 0 to 40o C
Operating Humidity 5 to 95% non-condensing
Power 12 VDC Nominal
Cleaning Self-Cleaning ( Automatic )
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• Replaces old traditional cabinet
analyzers and UV probes to have
organic analysis without any need of
toxic reagents, consumables , spares
& regular maintenance.
A model online water quality monitoring technologies
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SpectrometerProbes
ISEProbes
Physical
Probes
i::scan
A model online water quality monitoring technologies
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Online Water Quality Monitoring & UV/Vis Spectrometry
The Measuring Principle – Fingerprint
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Operations
From Raw Data to Event Detection
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Automatic cleaning of submersed sensors
Efficiency of the automatic cleaning w. pressure air
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• Measurement
results from Okhla:
• Continuous results
every 10 minutes,
automatic file
transfer of:
• NTU, COD, BOD,
NO3, DO, pH,
NH4-N, EC, Cl-,
Temp
Real Time Continuous Water Quality Monitoring Stations at the Ganga Basin