| 摘要 |
<p>PURPOSE:To treat a sewage in good efficiency by a method wherein an interior of a circular tank having an air diffusion pipe to a bottom portion thereof and a partition plate is formed from a mortar obtained by mixing sands of a coral reef and a cement to form an irregular layer. CONSTITUTION:A circular tank is partitioned into four chambers by partition plates 5-8 and, against respective partition plates 5-8 and a wall, a mortar obtained by mixing sands of a coral reef and a cement is thrown to form an irregular layer. Then, if a sewage is introduced from a water inflow port 3 and air is aerated from an air diffusion pipe 4, aerobic bacteria are propagated and adhered to the irregular surface. Thereafter, because a sewage is contacted with the wall while rotated and solid substance in said sewage are ground by the wall, a sludge amount is low and a sewage is treated in good efficiency.</p> |
