Conventional Sludge Dewatering and Drying

We define sludge dewatering as water removal operations without evaporation. In contrast, sludge drying involves evaporation, which requires significant thermal energy. Sludge drying is also sometimes called thermal drying or thermal dewatering. Since thermal drying is an energy-intensive process, dewatering is usually carried out as a prelude to thermal drying. Conventional dewatering operations are listed in Table 15.

Thermal drying of dewatered sludge is necessary for the following cases:

• requirement of low water content of the final product, such as in fertilizer production;

• improvement of heating value for efficient incineration; and

• reduction of transportation costs in disposal.

The main sludge drying processes are summarized in Table 16. Two relatively new drying techniques, namely reed bed drying and sludge immersion drying, are explained in the following.

Was this article helpful?

0 0
10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

Learning About 10 Ways Fight Off Cancer Can Have Amazing Benefits For Your Life The Best Tips On How To Keep This Killer At Bay Discovering that you or a loved one has cancer can be utterly terrifying. All the same, once you comprehend the causes of cancer and learn how to reverse those causes, you or your loved one may have more than a fighting chance of beating out cancer.

Get My Free Ebook

Post a comment