| 摘要 |
PROBLEM TO BE SOLVED: To provide a filtration apparatus which can discharge efficiently captured matter peeled from a filter medium during washing, prevent outflow of the filter medium contained in washing drainage from a drainage trough by means of a simple appliance and reduce the washing time and the amount of washing water in washing.SOLUTION: A filtration apparatus 1 includes a filtration layer 10 formed by packing a filter medium in the filtration tank 2 and a discharge trough 20 arranged above the filter layer 10, and a screen 60 is arranged on a side wall 22 of the discharge trough 20 which peels captured matter captured by the filtration layer 10 from the filter medium 11 by washing and discharges as washing drainage. The arrangement angle α of the screen 60 is 45-90 degree, and the arrangement width W is 14-36% of the inside-dimension width WT of the discharge trough 20. |
