FREEZING AND MELTING METHOD AND FREEZING AND MELTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a freezing and melting method and a freezing and melting apparatus capable of efficiently freezing sludge to reduce the energy required in freezing and capable of improving dehydration properties. SOLUTION: In a freezing and melting method and a freezing and melting apparatus for freezing sludge and melting frozen sludge to dehydrate the sludge, a preliminarily prepared mixture of sludge and an ice nucleus active protein-like substance is charged in a freezing and melting tank 2 when sludge is frozen.