Division BAT 31 In order to reduce SOX emissions to air from the calcining of green coke process, BAT is to use one or a combination of the techniques given below.

(i)

Wet scrubbing or seawater scrubbing.

See Section 1.20.3

The applicability may be limited in arid areas and in the case where the by-products from treatment (including e.g. waste water with high level of salts) cannot be reused or appropriately disposed of.

For existing units, the applicability may be limited by space availability

(ii)

Use of a specific SO_X absorbing reagent (e.g. absorbing solution) which generally enables the recovery of sulphur as a by-product during a regenerating cycle where the reagent is reused.

See Section 1.20.3

The applicability is limited to the case where regenerated by-products can be sold.

For existing units, the applicability may be limited by the existing sulphur recovery capacity as well as by space availability