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The production of iron from its ores involves powerful reduction reactions in blast furnaces. Cooling waters are inevitably contaminated with products especially ammonia and cyanide. Production of coke from coal in coking plants also requires water cooling and the use of water in by-products separation. Contamination of waste streams includes gasification products such as benzene, naphthalene, anthracene, cyanide, ammonia, phenols, cresols together with a range of more complex organic compounds known collectively as polycyclic aromatic hydrocarbons.

The conversion of iron or steel into sheet, wire or rods requires hot and cold mechanical transformation stages frequently employing water as a lubricant and coolant. Contaminants include hydraulic oils, tallow and particulate solids. Final treatment of iron and steel products before onward sale into manufacturing includes pickling in strong mineral acid to remove rust and prepare the surface for tin or chromium plating or for other surface treatments such as galvanisation or painting. The two acids commonly used are hydrochloric acid and sulfuric acid. Wastewaters include acidic rinse waters together with waste acid. Although many plants operate acid recovery plants, (particularly those using Hydrochloric acid), where the mineral acid is boiled away from the iron salts, there remains a large volume of highly acid ferrous sulfate or ferrous chloride to be disposed of. Many steel industry wastewaters are contaminated by hydraulic oil also known as soluable oil.

Industrial:

  • Preconditioning and pretreatment of water is a must for many industrial processes such as anodizing metals, forming paint product, boiler operations, cooling tower, electrical semiconductors, biotechnologies
  • Recovery of water for process rinsing and or rutilization
  • Removal of silica, heavy metals, salts for processing
  • Removal of wastes from processing
  • Production of coke requires use of water in by-process separation
  • Antifreeze reclaim, car wash water cleaning, mining and other industries require capturing run off and contamination
  • reduction of landfill costs upon concentration and separations
  • removal of organic and inorganic matter
  • demineralization
  • Chemical pre-treatment

 

Membrane Process & Controls // 922 N. 3rd Avenue // Edgar, WI  54426 // 715.352.3206

A Leader in the Design, Fabrication & Installation of Membrane Filtration Systems with Expertise in
Pasteurization, Cheese Production, Whey Fractionation, Pharmaceutical Controls, Millwork Support & Wastewater Treatment Facilities