The centrifuges are the ...

The centrifuges are the better way to drying the sludge.

Not always is the sludge drying process necessary, but in many cases it is the only solution. ¾ Sludge drying process diminishes volume of sludge making the transportation cost lower and the sludge storage easier; increases sludge calorific value; makes it hygienic (without pathogenic organisms); stabilizes it and improves its structure. ¾ There is quite a big variety of technical solutions of dryers among which contact and convective dryers are most popular. The choice of sludge drying facility should be dependent on the type of sludge and the method of sludge utilization. It should be emphasized that not all drying facilities are able to dry sludge only partially (less than 85-90% of DS) and, after all, not always there is a necessity to dry sludge up to 90% of DS or more.