Division 1 Cell technique
United Kingdom
BAT 1: BAT for the production of chlor-alkali is to use one or a combination of the techniques given below. The mercury cell technique cannot be considered BAT under any circumstances. The use of asbestos diaphragms is not BAT.
| Technique | Description | Applicability | |
|---|---|---|---|
| a | Bipolar membrane cell technique | Membrane cells consist of an anode and a cathode separated by a membrane. In a bipolar configuration, individual membrane cells are electrically connected in series. | Generally applicable. |
| b | Monopolar membrane cell technique | Membrane cells consist of an anode and a cathode separated by a membrane. In a monopolar configuration, individual membrane cells are electrically connected in parallel. | Not applicable to new plants with a chlorine capacity of > 20 kt/yr. |
| c | Asbestos-free diaphragm cell technique | Asbestos-free diaphragm cells consist of an anode and a cathode separated by an asbestos-free diaphragm. Individual diaphragm cells are electrically connected in series (bipolar) or in parallel (monopolar). | Generally applicable. |