| 摘要 |
<p>PURPOSE:To provide a biological treatment tank of a waste water purification tank which is not affected by the variation in the flow rate of water to be treated or seasonal temperature change, has a high treatment capacity, and facilitates the construction on the site. CONSTITUTION:In a tank having an inflow port 23 and an outflow port 26, a porous plate 29 is arranged in the bottom, an air diffusion member 24 is installed above the porous plate 29, and a biological reactor 15 communicating with the inflow port 23 and a filter layer 27, in which a porous plate 18 is arranged in the bottom and a granular filter medium is mounted on the porous plate 18, are formed. Moreover, in the biological treatment tank, an air diffusion member 19 is installed under the porous plate 18, a drainage pump 20 which discharge water outside the system is installed above the filter layer 27, and a filtration chamber 16 communicating with the bottom of the biological reactor 15 and a treated water chamber 17 communicating with the bottom of the filtration chamber 16 and the outflow port 26 are installed.</p> |
