OpenLegislation

Division 39

United Kingdom

Original text. Later amendments are not shown.

BAT for pelletisation plants is to treat the effluent water prior to discharge by using a combination of the following techniques:

  1. I..

    neutralisation

  2. II..

    flocculation

  3. III..

    sedimentation

  4. IV..

    sand filtration

  5. V..

    heavy metal precipitation.

The BAT-associated emission levels, based on a qualified random sample or a 24-hour composite sample, are:

In some cases, TOC is measured instead of COD (in order to avoid HgCl2 used in the analysis for COD). The correlation between COD and TOC should be elaborated for each pelletisation plant case by case. The COD/TOC ratio may vary approximately between two and four.
—suspended solids< 50 mg/l
—chemical oxygen demand (CODf1)< 160 mg/l
—Kjeldahl nitrogen< 45 mg/l
—heavy metals< 0,55 mg/l
(sum of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), lead (Pb), zinc (Zn)).

Annotations

Footnotes

f1

In some cases, TOC is measured instead of COD (in order to avoid HgCl2 used in the analysis for COD). The correlation between COD and TOC should be elaborated for each pelletisation plant case by case. The COD/TOC ratio may vary approximately between two and four.