Download - Stp study chhenai
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STP Study M/s Hydrotech Paryavaran India
Pvt Ltd
CAA II UC Chennai Auto Ancillary Industrial Infrastructure
Up gradation CompanyAmbattur Industrial Estate Near HCL Unit - V
Chennai
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STP (Gross Size 30 mt x70 mt)
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View of STP from Top
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Coarse Bar Screen (Constructed earlier but renovated by the firm )
Coarse Bar Screen Circular Tank Diameter 3 m depth 5 mt
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Grit Chamber - constructed earlier
Grit Chamber I Diameter 4.5 mt depth 6.5 mt RCC const
Grit Chamber Ii Dia 5.0 mt depth 6.5 RCC Construction
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Pumping Station Submersible Pump set 2 no ( 1 +1 standbye) each of 7.5 HP Collection tank dia 4.0 mt depth 6.5 mt RCC
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Bye Pass structure Not in use @the Time of visit
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STP Control Unit (Inside Brick Masonry Room)
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CI Inlet Pipe( i/d 300 mm 2 no) to Equalization Tank
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Collection Tank Cum Equalization Tank
Diameter 11 mt Depth RCC Const 3.8 mt
Excess effluent
again fed to tank
Inlet (One Inlet pipe no effluent)
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Over flow Out Let at Equalization Tank
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Electric Control of Two no Submersible Pumps at Equalization Tank
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Stilling Chamber Rectangular- RCC
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Fine Bar Screen Two numbers
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Grit Chamber
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FAB II (dia 7.3 mt )
Media in FAB II Out let of FAB II to Clarifier
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MBBR Bio Reactor FAB I
Oil and Grease in F AB I MBBR Media in FAB I
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Return sludge in FAB I
Return sludge Pump 2 HP
Return Sludge fed in to FAB I Pipe dia 63
mm
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Air Compressor Unit( 3 no Compressors)
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Air compressor distribution Header
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Sludge and Grit Out lets to sludge bed
Grit out let from Grit Chamber
Sludge out at FAB I
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RCC Clarifier (Dia 8.7 mt)
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Clarifier Out fall to disinfection
Settled Effluent at the out let of clarifier
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Disinfection unit
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Steel structures ( like stair and Platform)
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Sludge Bed
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Sludge infilitrate collection sump
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Sludge Distribution
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Out Let Houdi and Out let into pond
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Katcha Pond used to collect Treated effluent
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Raw sewage and Treated Sewage
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Lab at Site
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Inspecting Team
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Observations• Oil and grease has been observed in the FAB I so this needs to be removed at preliminary stage by
constructing oil and grease trap . This may constructed by department also• Return sludge is being fed in to FAB I . Normally in MBBR return sludge is not fed • STP was not running at Full capacity at the time of visit and no discharge meter was installed to check the
flow• Disinfection needs to be done regularly• Handling and Disposal of sludge agreement needs to be finalized with the operator • Plant was in good working condition .• Lab should have more testing equipment• Flow meter should be installed at STP• Following officers were present during visit• 1. Mr S Srinivasan Director and Mr N Palaniraja Chennai auto Ancillary Industrial Infrastructure Up
gradation Company • 2.Mr Rakesh Verma Sr Manger Projects M/s Hydro Tech Paryavaran India Pvt Ltd • 3Mr S Selvam Site Engineer M/s Hydro Tech Paryavaran India Pvt Ltd • Mr S Srinivasan is satisfied with the performance of the Plant executed by M/s Hydro Tech Paryavaran
India Pvt Ltd • Project was allotted on June 19 2006 vide CAAIIUC/STP and WTP /920 dt 19/6/2006 and completion time
was 15 months and it was completed June 17 2009 .The delay needs to be explained .and cost overruns if any needs to be checked .