| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively utilize an unused space of a structure by incorporating water purifying equipment for incorporating sewage to biologically and physicochemically purifying treatment into the structure. SOLUTION: A nitrification tank 2 is installed by making a good use of an inner space A of a structure 3 and is provided with one or plural purifying zones 8 hung down in the vertical inner space and a collecting vessel 9 for collecting treated water below the purifying zones 8. Water to be treated in a denitrification tank 1 can be sprayed to the purifying zones 8. The water to be treated in the denitrification tank 1 is sprayed to the upper part of the nitrification tank 2 formed in the structure 3 through a pipeline 14. And when the water to be treated gradually flows down while going along plural porous columnar bodies forming the purifying zones 8 one by one and passes through the contracted parts of the porous columnar bodies, oxygen in air is dissolved into the porous columnar bodies and the decomposition/nitrification by microorganisms stuck on the porous columnar bodies proceeds. Since the effectively usage of an unused space inside and outside the structure can be attained, necessary area required for construction of a sewage treating facility can be reduced.</p> |
