| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a combination septic tank equipped with a membrane separation tank having an outer wall part which has long-term reliability hard to generate the deterioration of weatherability and excellent in impact resistance and heat insulating characteristics. SOLUTION: In the combination septic tank provided with a membrane separation tank M including a membrane separator MO for filtering water to be treated subjected to activated sludge treatment, a first casing X1 having the membrane separation tank M provided therein and a second casing X2 having a tank other than the membrane separation tank M provided therein are provided so as to permit water to be treated to freely flow and the first casing X1 is provided on the ground or provided so as to be partially embedded in the ground and the outer wall part H covering the first casing X1 is provided. A hot wastewater flowing part R is provided between the first casing X1 and the other wall part H and a hot wastewater transfer mechanism B for guiding hot wastewater to the second casing X2 through the hot wastewater flowing part R is provided.</p> |
