Waste water plants

Waste water treatment plants exist as municipal waste water treatment plants, industrial waste water treatment plants or a combination of both. Normally the solids part of the waste water, dissolved or suspended, will end up as sludge .The above sludge can be dewatered and dried either partly or fully. The behavior of the sludge in a drier is much dependant on the foregoing waste water treatment process. Such sludge, by nature will contain long chain types of glue components that can make drying difficult.

Since Waste Water sludge drying commenced some 20 years ago, the disc drier has proven its superiority when it comes to this type of drying. In this respect the Stord Fjell TD disc design has proven its superiority in many WWT installations. The TD disc design offers vertical disc sides, preventing a pressing action towards the root of the disc, and the disc themselves are straight and parallel. It is the only drier that can dry the sludge fully to 90 -95 % solids or partly to 30 - 45 % solids for subsequent incineration. It is compact and has a superior drying economy compared to other driers.

• WWT sludge, when dried to 85 - 95 % solids may ignite and explode.

Again, the disc drier is superior to most other driers in this respect.

During operation a very moist atmosphere exists in the drier and special safety devices normally only need to be engineered into the drier during start up and shut down.