H Najibi - Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
N Najibi - Department of Civil Engineering, University of Tehran, Tehran, Iran
H farhadi - Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

The Industrial Wastewater Treatment Facility (Building 4761) treats 50,000 gallons per day of metal finishing waste containing cyanide, chrome and heavy metals from Buildings 4760 and 4705, and 5000 gallons per day of paint booth and water blast wastewater. The new IWTF includes two 77,000 gallon effluent tanks, two 77,000 gallon influent tanks, two cyanide reaction tanks, lime silo and slurry feed system, sulfuric acid storage tank, chloride gas feed system, SO gas feed system, chemical treatment tank, diatomaceous earth slurry tank, paint waste holding tank, metal finishing wastewater flocculator, clarifier, sludge holding tanks, filter press, dryer, and miscellaneous pumps, mixers, etc.General industrial waste waters, general metal finishing waste waters, and waste waters containing hexavalent chromium, from Building 4760 and Building 4705, are transferred by underground piping to the influent pumping station on the west side of the IWTF. Wastewater generated locally at the IWTF from the cyanide treatment process, filter press, return flow from the sand filter, and rainwater collected in the containment areas are also combined in the pumping station.

Metal Finishing Wastewater, Cyandie Wastewater Treatment, Paint Spray Booth Wastewater Treatment