Division BAT 15 In order to reduce the amount of sludge to be treated or disposed of, BAT is to use one or a combination of the techniques given below.
United Kingdom
| Technique | Description | Applicability |
|---|---|---|
| (i) Sludge pretreatment | Prior to final treatment (e.g. in a fluidised bed incinerator), the sludges are dewatered and/or de-oiled (by e.g. centrifugal decanters or steam dryers) to reduce their volume and to recover oil from slop equipment | Generally applicable |
| (ii) Reuse of sludge in process units | Certain types of sludge (e.g. oily sludge) can be processed in units (e.g. coking) as part of the feed due to their oil content | Applicability is restricted to sludges that can fulfil the requirements to be processed in units with appropriate treatment |