2024 Volume 35 Issue 2 Pages 135-142
This article outlines two sludge conversion technologies known as drying and carbonization, both of which are used to convert organic sludge into solid fuels. Because of the large amount of water it contains, the key to converting sludge into solid fuel is how to efficiently remove the water while improving the quality (calorific value) of the fuel without losing the combustible content (organic matter) in the sludge. At present, solid fuel conversion is not a major technology for sludge utilization, but is fundamental to the effective utilization of all components of the entire sludge amount. In recent years, various equipment and processes have been developed to improve energy efficiency during solid fuel conversion, and new drying and carbonization processes that integrate conventional processes are now being proposed. This article introduces those technologies.
