A study on the dewatering of industrial waste sludge by fry-drying technology

Abstract. In sludge treatment, drying sludge using typical technology with highwater content to awater content of approximately 10% is always difficult because of adhesive characteristics of sludge. Many methods have been applied, including direct and indirect heat drying, but these approaches of reducing water content to below 40% after drying is very inefficient in energy utilization of d…