| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid-liquid separator, a catchment hole formation method thereof and water treatment equipment, using a cylindrical screen for keeping pressure loss small as a whole, and attaining uniform catchment.SOLUTION: A carrier outflow prevention device (solid-liquid separator) 1 is installed in a treatment water outflow position of a treatment tank for holding a carrier (solid of separation object) immobilizing a microorganism in treatment water in a floating state. The carrier outflow prevention device 1 comprises a cylindrical screen 10 for passing the treatment water while checking the outflow of the carrier, and an inner cylinder pipe 50 installed inside the cylindrical screen 10 and is provided with a large number of catchment holes 51 to introduce the treatment water to the inside from the catchment holes 51, so as to make the treatment water passed through the cylindrical screen 10 flow out of outflow ports 53 and 53 on both ends. The catchment holes 51 are formed so that the opening area per inner cylinder pipe unit area in positions (both-end positions) close to the outflow ports 53, becomes smaller than the opening area per inner cylinder pipe unit area in a position (central position) distant from the outflow port 53 and 53. |
