Improvement of Sewage Treatment Plant at Mayanakari rastha in Bodinayakanur Municipality

Supply, delivery and fixing of handrails around the walkway using 40mm size MS pipes for vertical posts at an interval of 1.50m and to a height of 0.90m and 32mm MS pipes horizontally at top and 25mm MS pipes horizontally at middle including cost of welding, labour charges etc complete and as directed by TWAD Board officers.

Servicing of the existing Mechanical Coarse Screen & Fine Screen. Replacing of bearing, chain alignment, motor break checking and lathe works including complete repair as per standared specification

Supply & Installation of shaft alongwith bearing for Fine screen.Removing the old shaft and reconditiong the shaft lathe work and assembling of the same.

Replacing the existing cover of the Screen control panel and contactors ir required . With 14 SWG sheet with epoxy coated cover IP 65 including cost of all materials and labour charges etc.,

Servicing of the existing Gates and replacement of Handwheel . Dismantling of stem & shutter, servicing and assembling the same for functional condition.

Primary Clarifier- Removing the existing drive head, supply and instalaltion of new Drive Head suitable for the existing Primary Clarifier Mechanism. S 12 Center Driven complete assembly of S 12 Drive Head consisting Internal Gear & Turn Table assembly, Upper housing, Worm and Worm Gear assembly complete set.

Aeration System- Servicing of the existing Gates and replacement of Handwheel . Dismantling of stem & shutter, servicing and assembling the same for functional condition.

Supply and fixing of Fine Bubble Tube Diffuser : Model : AFT-N31000E, Shape of Aerator : Tube Type, Size of Aerator : 92mm dia x 1000mm long, Type of Bubble : Fine Bubble, Bubble size : (1-3)mm, Details of Fittings per Aerator: PVC Pipe support, 2 Nos, SS memrane clips, 1no NPT End connector, MOC of Membrane : EPDM, MOC of Membrane support : PVC, MOC of Membrane Clamps : ss-304, MOC of End Connector : ABS, Size of End Connector : 3/4" NPT, Temperature Tolerance : 90Deg.c Effective area of membrane : 0.22sqm, Air throughtput rate per diffuser : (6.5-13) cum/hr, Design floe for 24hours operation.

Servicing of the existing Blowers . Replacement of new set of Bearings, rings, Oil seal, Gasket, Pressure Gauge and lubirication oil

Air blowers for Sewage Treatment Plants (STPs) are critical for aeration, typically requiring robust roots or tri-lobe blowers delivering high-pressure (0.1–0.7 kg/cm²) and, depending on plant capacity, 50 to 3000+ CFM. Key specifications include 5-30 HP electric motors (IE3), <65-70 dB noise levels, and durable materials like cast iron or mild steel. Key Technical Specifications for STP Blowers Blower Type: Positive Displacement Roots Blower or Tri-lobe Blower. Capacity: Ranges from small 0-200 m³/hr to large 3000 m³/hr, depending on STP size. Pressure Range: Typically 0.1 to 0.7 kg/cm² (or 9.8–98.0 kPa) for effective aeration. Motor/Drive: 415 V, 3-phase, 50 Hz, IE3 energy-efficient motor. Material of Construction: Cast Iron or Mild Steel (sturdy, durable). Noise Level: 60-70 dB (sound-proof enclosure recommended). Accessories: Includes safety pressure relief valve, suction filter, pressure gauge, non-return valve (NRV), and flexible couplings.

Motor rewinding works . 30 KW motor dismatling and rewinding the coil, bearing replacement and assembly and fixing the same

Dismantling the old ones & Replacement of new contactors for the existing control panel 3 pole 440 V 50 A capacity

Secondary Clarifier- Removing the existing drive head, supply and instalaltion of new Drive Head suitable for the existing Secondary Clarifier Mechanism. S 12 Center Driven complete assembly of S 12 Drive Head consisting Internal Gear & Turn Table assembly, Upper housing, Worm and Worm Gear assembly complete set.

Repair work for the secondary sludge pump . Repalacing of bearing Upper & lower, oil seal upper& lover, seal sensor servicng the same

Supply , delivery, erection, Testing and commissioning of Secondary Sludge Pump of type Open well vertical type submersible pumpset with capacity of 252 cum/ hour at Head of 10m at reputed make (Kirloskar/Kishore/Acqua) as per specification complete and as directed by TWAD Board officers

Pump Lifting arrangement. Suuplyn of 150mm ISMB vertical 2.5 mtrs, Horizontal ISMB 150, fixing the same, Supply & instalaltion of 1MT manual trolly with HOT including lifitng chain .

Filtrate Pump control panel - replacement of internal components 3 pole 440 V contactors

Supply and Instalaltion of Chlorine Gas leak detector with single sensor alongwith Alarm system complete set as directed

Servicing of the existing Centrifuge system . Dismantling the centrifuge system, bowl cleaning, replacing of bearing and assembly the same to working condition.

Supply, Delivery and Fixing of 120W LED Street Light Fitting with LED ((LIGHT EMITTING DIODE) LOWER END) with Fittings including cost of material and all labour charges for loading, unloading and transport etc.., V-I Pg No- 214

Supply and run of 2 of 4sq.mm. PVC insulated SC unsheathed FRLS copper conductor of 1100V on 7/20 GI bearer wire for service connection mains SD-65

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