PURPOSE: To efficiently, smoothly and certainly develop floating scum discharge function and supernatant liquid discharge function with a time lag by providing an outflow port part, a movable overflow weir, a weir raising and lowering drive means, an outflow water passage, a water passage ...
In addition to in batch type biological treatment, being clear liquid discharge mannerPURPOSE: To prevent the involution of sludge by slowly controlling the discharge speed of the supernatant soln. from a biological treatment tank.志村 四郎