| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a circulating septic tank for a mobile toilet which reduces load fluctuation for a biological treatment tank. SOLUTION: A circulating type septic tank for a mobile toilet is equipped with a sewage storage tank (raw water tank) 1, a solid removing tank 2, a biological treatment tank 3, an ozone treatment tank 4 and a treated water tank 5. When the toilet is used, the water of the treated water tank which has been used as the washing water for the toilet is allowed to flow in the order of the sewage storage tank, the solid removing tank, the biological treatment tank, the ozone treament tank and the treated water tank to be cleaned (solid line route). When the toilet is not used, water is circulated between the sewage storage tank, the solid removing tank, the biological treatment tank and the ozone treatment tank (broken line route).</p> |
