Division BAT 64: In order to reduce the load of organic compounds, NOX, NOX precursors and SOX sent to the final waste gas treatment (see BAT 66) from DNT, TDA and MDA plants, BAT is to use a combination of the techniques given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| a. | Condensation | See Section 12.1 | Generally applicable |
| b. | Wet scrubbing | See Section 12.1. In many cases, scrubbing efficiency is enhanced by the chemical reaction of the absorbed pollutant (partial oxidation of NOX with recovery of nitric acid, removal of acids with caustic solution, removal of amines with acidic solutions, reaction of aniline with formaldehyde in caustic solution) | |
| c. | Thermal reduction | See Section 12.1 | Applicability to existing units may be restricted by space availability |
| d. | Catalytic reduction | See Section 12.1 | |