Recently, a system for converting sewage sludge into a solid fuel and its utilization is drawing attention. For disseminating this system, reduction of fuel-dust scattering and retention of a high calorific value, reduction of power consumption for processing are important. JFE has developed the technology, “Surface solidification sludge dryer” that integrates unique modeling technology and surface solidification technology into a band type dryer.Features of the technology are as follows: 1. Reduction of dust amount generated upon dehydrated sludge modeling process. 2. Retention of a high calorific value of the solid fuel by lower temperature drying. 3. Utilization of waste heat from sludge incinerator.