3- Mechanical Equipment selection and sizing :
• Pumps( submersible, horizontal, positive displacement)
• Blowers ( aeration , filtration ,grit removals)
• Surface aerators ( aeration tanks)
• Bridges (primary, secondary, thickeners)
• Mixers
• Flow Boosters
• Valves manual, electric and pneumatic (gate, ball, butterfly)
• Air diffused systems ( disc, tubes, plates)
• Sludge dewatering systems (beltpress, polymer preparation, sludge
• feed,polymer feed ,washing system, dried sludge conveying )
• Sludge dewatering centrifuges ( Decanters)
• Polymer preparation tanks
• Dissolved air Flotator D.A.F tanks
• Grit removal bridges
• Sand classifiers
• Penstocks and weirs manuals and electrical
• Chlorination systems
• UV Ultra violet disinfection systems
• Mechanical Screens Coarse, fine , rotary
• Screw conveyors and belt conveyors
• Telescopic valves
4- Electrical Work Engineering
• Single line Diagram
• Electrical loads calculations
• Cables deratings , voltage drop calculations and cable sizing
• Cable duct, conduits and sleeves layout and selection
• Local control panels design
• Main control centers MCCs wiring design
• Main distribution panels MDP design
• Transformers and Ring Main Unit selection
• Lighting
• Earthing systems
5- Instruments and measurements
-Sensors and transmitters selection, calibration
Ultrasonic level – Electromagnetic flow- Ultrasonic flow- dissolved oxygen
-PH sensors- MLSS Mixed liquor suspended solids- Turbidity – toxicity- pressure differential –ORP sensors- residual chlorination- H2s sensors- – Vacuum Pressure switch.
Switches (level –pressure- torque-leak)
Temperature detectors (PTCs – RTDs – thermocouples)