Jeddah Airport Arabia Saudi


OHL Medioambiente Inima – GS E&C – Alfatah


Saudi Arabia







Treatment Flow

Daily medium: 500.000 m3/d, Half time: 20.833 m3/h, Maximum hours: 31.250 m3/h


Treatment line

Water line formed by; Inlet flow measurement, Inlet works with general by-pass outlet, Removal of coarse solids, Removal of fine solids, Sand removal by means of vortex grit chambers, Distribution chambers to primary clarifiers, Primary clarifiers, rectangular type, Distribution chambers to biological reactors, Biological treatment by continuous aeration process, Internal recirculation, Chemical precipitation of the phosphorus, Addition of methanol for carbon supplementation, Secondary settling, Effluent filtration, Filtered-water tank, Elevation of filtered water to disinfection, Disinfection of filtered water using ultraviolet system, Disinfection of treated water with hypochlorite, Outlet flow measurement.
Sludge line formed by; Recirculation of mixed liquor to the biological reactors, Extraction of excess biological sludge, Gravity thickening for primary sludge, Pumping of thickened primary sludge to mixing chamber, Storage of excess sludge, Pumping of biological sludge to gravity belt thickeners, Waste activated sludge thickening by means of gravity belt thickeners, Chemical conditioning of sludge by cationic polyelectrolyte, Storage of thickened sludge, Pumping of thickened sludge to mixing chamber, Equalization of Thickened Primary and Thickened Waste Activated Sludge, Pumping of mixed sludge to anaerobic digestion, Anaerobic digestion, Storage of digested sludge, Pumping of sludge to dewatering system, Dewatering, Chemical conditioning of sludge by cationic polyelectrolyte, Storage of dewatered sludge.
Gas line formed by; Membrane gasholders, Gas burners.



  • Detailed technical information and description of the Project including all information, drawings, diagrams and data required as well as all technical form sheet requirements.
  • Project Description.
  • Process Design.
  • Process Modeling.
  • Electrical Design.
  • Instrumentation and Control.
  • Preliminary Project Drawings.
  • Preliminary List of Specifications.
  • O&M cost study.
  • Measurements and Quotation.
  • Technical Amendments/Qualifications.
  • Schedule of Equipment & Technology Suppliers.
  • Technical Data Submission.
  • Detailed technical information and description of the connection requirements to the sewage network