SUPPORT SEPARATION SCREEN APPARATUS, METHOD OF AERATION OF SUPPORT SEPARATION SCREEN, AERATION APPARATUS FOR THE METHOD, WASTE LIQUID PROCESSING METHOD AND APARATUS USING THE SCREEN (SEE PCT)

摘要

A support separation screen apparatus is used for separating a bacteria fixationsupport (5) used in an aeration tank (1) for biologically purifying organic and inorganicmatters in a waste liquid. A flow straightening body (20) is disposed in the proximity of asupport separation screen (7) in a spaced relation and an aeration device (8) is disposedbelow and in the proximity of the support separation screen in order to reliably preventclogging of the screen. A method and an apparatus for support separation screen isprovided for preventing clogging of the screen by providing an air-diffusing header for air-diffusion at a time-varying diffusion rate and an air-diffusion rate controller for changingthe air-diffusion rate with time. Further, a waste liquid processing method and an apparatusis provided for preventing clogging of a screen and allowing the function of a bacteriafixation support to be fully performed by producing a circulation in a tank and bydispersing uniformly a flow into a support separation screen.