| 摘要 |
<p>PURPOSE:To increase the amt. of the oxygen dissolved in a treatment tank to a satd. state and to improve waste water treatment capacity by pressurizing and supplying an oxygen-contg. gas into treated water in a supply path for supplying the treated water from the anaerobic treatment tank to an ultrafilter. CONSTITUTION:The treatment tank 1 for making aerobic treatment of the waste water by activated sludge and the ultrafilter 2 which separates the treated water to concd. sludge and cleaned water are provided. The supply path 4 interposed with a pump 3 for press-supplying the treated water from the treatment tank 1 to the filter 2 and a return path 5 for returning the concn. sludge from the filter 2 to the treatment tank 1 are provided between the treatment tank 1 and the filter 2. A supply device 7 which press-supplies the oxygen-contg. gas in the treated water between the pump 3 and the filter 2 in the supply path 4 is provided. As a result, the amt. of the oxygen dissolved in the treatment tank is increased to the satd. state and the waste water treating capacity is improved.</p> |
