Mitsubishi Heavy Industries Technical Review
    Vol. 56 No. 1 (2019)   New Products & Technologies
    Technical Papers

    Development and Actual Operation of Sludge Dryer for High Viscosity Sludge

    Xingchen Lin,
    Kouki Endou,
    Tomomichi Egusa,
    Hirohiko Kaida,
    Naoki Matsudera,
    Jingbo Hu

    Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. (hereinafter, MHIEC) is engaged in the development, design/manufacturing, installation and after-sales service/operation management of treatment facilities for waste such as municipal refuse and sewage sludge. In recent years, the reduction of the volume of sludge has been required at both domestic and overseas sewage treatment plants because the amount of discharged sludge has been increasing and final landfill sites have become scarce. Therefore, an increased need for sludge dryers is expected. In particular, in countries such as China and those in Southeast Asia, as socio-economic activities become advanced, the properties of sludge are becoming diversified, and sludge dryers that can appropriately and stably dry even high-viscosity sludge, which is hard to dry, are needed. MHIEC developed a new sludge dryer adaptable to various sludge properties such as higher viscosity. This article describes an overview of the sludge dryer and its operational states.