Division 81

BAT is to minimise the waste water discharge from continuous casting by using the following techniques in combination:

1. I..

   the removal of solids by flocculation, sedimentation and/or filtration

2. II..

   the removal of oil in skimming tanks or any other effective device

3. III..

   the recirculation of cooling water and water from vacuum generation as much as possible.

The BAT-associated emission levels, based on a qualified random sample or a 24-hour composite sample, for waste water from continuous casting machines are:

— suspended solids

< 20 mg/l

— iron

< 5 mg/l

— zinc

< 2 mg/l

— nickel

< 0,5 mg/l

— total chromium

< 0,5 mg/l

— total hydrocarbons

< 5 mg/l.