APPARATUS FOR DECANTING SUPERNATANT LIQUID IN SEQUENCING BATCH REACTOR CAPABLE OF COMPULSORILY DECANTING PURIFIED SUPERNATANT LIQUID BY USING SIPHON

摘要

PURPOSE: To provide an apparatus for decanting supernatant liquid, which is able to stably decant the supernatant liquid with a simple structure and is easy to be maintained. CONSTITUTION: A supernatant liquid inlet pipe (8) that is connected to a discharge valve by a wrinkled pipe (4) is coaxially connected to a floating (1) that is able to control buoyancy. In an inlet of the inlet pipe, a plate check valve (10) is supported by elasticity of a spring (9) so that the plate check valve is opened or closed by opening or closing of the discharge valve.