| 摘要 |
PROBLEM TO BE SOLVED: To provide a water purification sludge treatment apparatus and method which can facilitate separation of sludge and water, and maintain an excellent quality of the separated water. SOLUTION: Raw water for drinking water is precipitated in a settling tank 1, and precipitated sludge is subjected to concentration treatment in a concentration tank 4. In the middle of transportation of concentrated sludge, the sludge during transportation is pressurized to a pressure equal to or higher than the atmospheric pressure and not more than 1 MPa by a pressurizing means 5, and heated to a heat treatment temperature of≥100°C and≤130°C by a heater 7. The temperature is held for 5 minutes or longer by a temperature holding part 8, and then cooled to a temperature suitable for dehydration treatment. The cooled sludge is returned to the atmospheric pressure by a pressure control part 12 to be dehydrated by a dehydrator 13. COPYRIGHT: (C)2007,JPO&INPIT
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