mbbr presentation
TRANSCRIPT
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A WARM WELCOMEA WARM WELCOMEFORFOR
SHAPOORJI PALLONJI ENGINEERS CONSTRUCTION
EVERY DROP COUNTS
A PRESENTATION ON A PRESENTATION ON SEWAGE TREATMENT PROCESSSEWAGE TREATMENT PROCESS
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• Compact Plants - Occupy Compact Plants - Occupy Minimum Space.Minimum Space.
• Less O&M CostLess O&M Cost• Less Manpower Less Manpower
requirementrequirement• No Odour Nuisance.No Odour Nuisance.• Flexibility for future Flexibility for future
ExpansionExpansion• Minimal Sludge Minimal Sludge
Handling.Handling.• Easy To Use & Operate.Easy To Use & Operate.
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WASTE WATER WASTE WATER CONTAININGCONTAINING
CONTAMINANTSCONTAMINANTSBACTERIA HARMLESS END HARMLESS END
PRODUCTSPRODUCTS
CO2 + H2O + NEW BACTERIA
CH4 + H2O + NEW BACTERIA
PRESENCE OF O2
ABSENCE OF O2
AEROBIC
ANAEROBIC
THE PROCESS
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• Most Ideal Solution• Large Land Requirement
However
• Routing pipelines through congested areas of the city. • Digging up of roads for laying of pipelines. • Construction of bridges for conveying pipelines across the river, if any• Setting up Sewage pumping stations
Massive Investment Required for
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• Investment for laying of pipelines avoided.
• Investment in setting up pumping stations minimized.
• Reduced cost of operations due to absence of pumping.
• Treatment as close as possible to source of generation.
• Better flexibility to cater to future expansions.
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• pHpH
• O & GO & G
• B.O.D.B.O.D.
• C.O.D.C.O.D.
• T.S.S.T.S.S.
• : 6 - 9: 6 - 9
• : 50 mg/l: 50 mg/l
• : 200-275 mg / l: 200-275 mg / l
• : 550-600: 550-600 mg / l mg / l
• : 350-450 mg / l: 350-450 mg / l
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• PhPh
• O & G (mg / l )O & G (mg / l )
• B.O.D. (mg / l)B.O.D. (mg / l)
• C.O.D. (mg / l)C.O.D. (mg / l)
• T.S.S. (mg / l)T.S.S. (mg / l)
6-96-9
< 10< 10
< 30< 30
< 100 < 100
< 50 < 50
6.5 - 8.56.5 - 8.5
< 5< 5
< 10< 10
< 100< 100
< 10 < 10
PARAMETER NORMS FORDISPOSAL
FOR RECYCLE
For Disposal ToOn Land Water
Bodies
Gardening.
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Operational Requirements of a Operational Requirements of a Wastewater Management SystemWastewater Management System
Meet CPCB / SPCB / WHO Norms Meet CPCB / SPCB / WHO Norms
Meet Coliform Count after TreatmentMeet Coliform Count after Treatment
Low Foot Print AreaLow Foot Print Area
Flexible in operation : Should accept varying Flexible in operation : Should accept varying loadsloads
Easy to Operate & Maintain Easy to Operate & Maintain
No smell / odourNo smell / odour
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SEWAGE
TERTIARYTREATMENT
RECYCLE
DISPOSAL
For Removal OfSS, Oil etc.
For Reduction OfBOD, COD etc.
PRIMARYTREATMENT
Physical TreatmentScreening, Oil & Grease Removal
SEC.TREATMENT
Biological Treatment
Polishing UnitsDual Media Filter
Activated Carbon Filter
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EVOLUTION OF TECHNOLOGYEVOLUTION OF TECHNOLOGY• Oxidation PondsOxidation Ponds
• Anaerobic Systems (UASB/AF etc.)Anaerobic Systems (UASB/AF etc.)
• Aerobic ProcessesAerobic Processes– Suspended Growth : (ASP & Variants) Suspended Growth : (ASP & Variants) – Attached Growth Processes Attached Growth Processes
• S A F FS A F F
- - FLUIDISED BED REACTORFLUIDISED BED REACTOR (MBBR) (MBBR)
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• Natural Mode Of Treatment.Natural Mode Of Treatment.• Large area requirement.Large area requirement.• Odour Nuisance Likely.Odour Nuisance Likely.• Consumes Power For Pumping Sewage Consumes Power For Pumping Sewage
Out Of The City.Out Of The City.• Complete Treatment Cannot Be Complete Treatment Cannot Be
Guaranteed.Guaranteed.• Expected Project Schedule - 1 - 2 YearsExpected Project Schedule - 1 - 2 Years
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INFLUENT
EQUALISATIONTANK
AERATIONLAGOON
TREATED EFFLUENT
UASB - I
UASB - II
SLUDGE DRYINGBED
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• Up flow Anaerobic Sludge Blanket Up flow Anaerobic Sludge Blanket Reactor.Reactor.
• No Aeration Device Required.No Aeration Device Required.• Odour nuisanceOdour nuisance• Sensitive To Fluctuations / Shock Loads.Sensitive To Fluctuations / Shock Loads.• Calls For Adequate Post Aeration To Calls For Adequate Post Aeration To
Meet The Norms.Meet The Norms.• Regular Skilled Monitoring - Essentiality.Regular Skilled Monitoring - Essentiality.• Long Start Up Time : 3 - 4 MonthsLong Start Up Time : 3 - 4 Months• Restart Time : Minimum 1 MonthRestart Time : Minimum 1 Month
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INFLUENT
EQUALISATIONTANK
TREATEDEFFLUENT
+
+
+
+
SLUDGE DRYINGBEDS
AERATION TANK
SEC. CLARIFIER
SLUDGE RECYCLE
SURFACE AERATOR
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ACTIVATED SLUDGE PROCESSACTIVATED SLUDGE PROCESS
RECYCLED SLUDGE
SETTLINGTANK
AERATION TANK
AERATORS
TREATEDEFFLUENT
AFTERPRIMARY
TMT.
SLUDGE FOR TREATMENT / DISPOSAL
F / M ? M . L . S . S . ?
DISSOLVED OXYGEN ?
PUMPING COSTRECYCLED SLUDGE % ?
F / M : FOOD TO MICRO-ORGANISM RATIOM.L.S.S. : MIXED LIQUOR SUSPENDED SOLIDS
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INHERENT PROBLEMS
• HIGH OPERATING COSTS
• COMPLEX MECHANICAL EQUIPMENTS
• SKILLED PROCESS OPERATIONS
• LARGE QUANTITY OF DIFFICULT TO HANDLE SLUDGE PRODUCED
• SUSCEPTIBLE TO SHOCK LOADS
• CONTINUOUS POWER SUPPLY REQUIRED
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SCRENNING & EQUALISATION
RAWSEWAGE
V V V V V V V V V V V V V V V V V
M
M
SAFF REACTOR
AIR BLOWERS
AIRDIFFUSERS
FIXED MEDIA
SAFF TREATMENT SYSTEM
SLUDGEDRYING
BEDS
SLUDGE
(OPTIONAL)
FILTER PRESS
CHLORINATION
TREATEDSEWAGE
TUBESETTLER
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BASED ON PRINCIPAL OF MOVING BED ATTACHED GROWTH
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FBR ……….FBR ……….
• has media which supports the has media which supports the biomass.biomass.
• The media is in suspension, since The media is in suspension, since the specific gravity of the media the specific gravity of the media is less than that of water.is less than that of water.
• The fluidization of the media The fluidization of the media takes place by current set by takes place by current set by aeration.aeration.
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V V V V V V V V V V V V
M
M
REACTOR - I REACTOR - II
AIR BLOWERS
AIRDIFFUSERS
FLOATING MEDIA
FBR TREATMENT SYSTEM
SLUDGEDRYING
BEDS
SLUDGE
(OPTIONAL)
FILTER PRESS
CHLORINATION
TREATEDSEWAGE
TUBESETTLER
TERTIARY TREATMENT
Oil &
Grease trap
Equalization
Cum
Collection
Tank
SCREEN
V V V V V V
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A) EQUALISATION TANK
THE OBJECTIVE
• Dampen / absorb the effluent flow rate variations.
• Keep the effluent in mixed condition to obtain homogenous characteristics.
TO ENSURE
Desired treatment efficiency of the down line system.
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A) EQUALISATION TANK
V V V V V V V
RAW SEWAGE
BAR SCREENCHAMBER
AIR GRID
EQUALISATION TANK
AIR BLOWER
M
M
FEEDPUMPS
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FLUIDISEDFLUIDISEDBEDBED
REACTOR REACTOR (MBBR)(MBBR)
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FEATURESFEATURESFROM
PRIMARY
FBREACTOR-I
A) TWO REACTORS IN SERIES
FBREACTOR-II
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FEATURESFEATURESSEWAGE
INLET
SEWAGEOUTLET
B) NO SHORT CIRCUITING
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FEATURESFEATURESSEWAGE
INLET
C) COUNTER CURRENT FLOW
AIR DISTRIBUTION GRID
V V V V
SEWAGE
AIR
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FEATURESFEATURES
D) ENHANCED OXYGEN TRANSFER
V V V V V V V V
REACTOR WITHOUT CARRIER ELEMENTS
REACTOR WITH CARRIER ELEMENTS
AIRBUBBLES
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FEATURESFEATURES
F) NO SLUDGE RECYCLING
FBREACTOR-I
FBREACTOR-II
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AEROBIC / ANAEROBIC &FACULTATIVE LAGOONS
FB REACTOR
OXIDATION DITCH
COMPARATIVE AREA REQUIREMENTS
ASP
SAFF REACTOR
FB REACTOR
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Specific Advantages of FBR over Specific Advantages of FBR over other processesother processes
• Very low area requirement : Approx. Very low area requirement : Approx. 1/10th That Of Conventional Processes1/10th That Of Conventional Processes
• High treatment efficiency.High treatment efficiency.• Digested Sludge - No Sludge Treatment Digested Sludge - No Sludge Treatment
Reqd.Reqd.• Ease Of Operation & Maintenance - Ease Of Operation & Maintenance -
Minimum Manpower.Minimum Manpower.• Quick re-start after prolonged shut-downsQuick re-start after prolonged shut-downs
– typically after 1 week shut down, re-start time typically after 1 week shut down, re-start time is only 12 hours.is only 12 hours.
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HAVE A NICE DAY
THANK YOU ALLTHANK YOU ALLLet us allLet us all
make A Green Earthmake A Green Earth