NickelRück – Recovery of nickel from process waters of phosphating

Initial situation:

• Processes and waste water containing nickel are produced during the phosphating of steels
• Seizure of phosphating sludge after the addition of chemicals in waste water treatment
• Sewage must comply with discharge criteria

Working topics:

• Model development for metal extraction
• Investigation of innovative membrane materials
• Selection of the optimal membrane contactor and a suitable extraction agent
• Operational tests for the development of a process concept for nickel recovery

Results:

• Recovery of nickel from process waters of the phosphating of steels
• Minimization of fresh water requirements and compliance with waste water limits
• Development of a technology based on innovative membrane contactors