Sludge is remove by using T-shape spanner, so it would have no harmful effect of the person removing the sludge.
Structure
- These are designes with plow blade(②) is installed inside the bowl(①), and has dualshafts ① and ② are rotated at once during common operation.
- If hte sludge were accumulated too much on the wall, the plow blade can be used to scrap the sludge that will be collected by a waste cart at the bottom.