| 摘要 |
<p>PURPOSE:To purify and treat various water to be treated such as organic and inorganic drainage at the high degree by properly designing the number of installation, a structure and a shape in accordance with water quality and water quantity in a water treatment system and arranging side by side a biological treatment equipment for controlling the rate of the introduced water to be treated to the existing biological treatment equipment. CONSTITUTION:Many soft linear or stringy media 7 stuck with organisms are attached to the rotary shafts 8 inside of a biological treatment tank 6. Water to be treated, sludge returned from a precipitation tank and/or the organisms recovered from the treatment tank 6 are supplied to this treatment tank 6 from the upper part thereof. While air is supplied from the bottom part 9 of the tank, aeration treatment is performed. While organisms are stuck on the media 7 stuck therewith and propagated, purification of water to be treated and propagation and activation of activated sludge are performed. Then, sludge settled on the bottom part 9 is concentrated and continuously or discontinuously supplied to the aeration tank in a main treatment line or recirculated to the treatment tank 6. Furthermore, the water to be treated sent from the treatment tank 6 is introduced into the precipitation tank.</p> |
