PRODUCTION OF SOLIDIFIED MATERIAL OF SEWAGE SLUDGE INCINERATION ASH

摘要

PROBLEM TO BE SOLVED: To provide a method of producing a solidified material of sewage sludge incineration ash which is inexpensive and has high strength and furthermore in which sewage sludge incineration ash solidified material of high quality can be produced. SOLUTION: Sulfuric acid solution 2 cooled to prescribed temperature and sewage sludge incineration ash 2 are kneaded while cooled to prescribed temperature in a kneader 3 with a gyro to form clay-like kneaded material 4. After the clay kneaded material 4 is injected into a mould 5, it is dried in a furnace 8 to form a solidified body 7. And the solidified body 7 is subjected to natural curing 8 to produce sewage sludge incineration ash solidified material 9.