| 摘要 |
A waste water treatment apparatus has a cylindrical container, an inverted funnel in the container defining a flow path for liquid through the container, an inlet communicating with the container outside the funnel and an outlet communicating with the container inside the funnel, a riser tube centrally and axially located within the container and having liquid discharge means communicating with the upper end thereof and a gas feed tube for discharge of gas into the riser tube at its lower end to draw material into and up the riser tube for discharge from the discharge means into liquid in the container outside the funnel.
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