PROCESS FOR REMOVING WASTE WATER FROM HARDENING AND GALVANIZING SHOPS

摘要

The present invention provides in a process for removing waste water obtained from salt baths used in hardening shops and galvanizing shops by evaporating the deleterious-matter containing substances and completely detoxicating the evaporation concentrates, the improvement in which the concentration of the waste water is first reduced to a salt content of 300 to 500 g per litre and that this concentrated solution is then fed into a liquid salt bath.