| 摘要 |
<p>PURPOSE:To purify water by putting a basket containing a filter medium body in a waste water tank filter and making waste water from a gutter permeate through the filter medium bag, and to purify water by air bubbles due to the air transfer by pressure. CONSTITUTION:A tank filter is installed downstream of a sedimentation tank, and a basket 1 in the sedimentation tank is covered with cloth to accumulate earth and sand thereon. A basket 1 in the tank filter is provided with a mesh plate 2 on which a filter medium body 3 is mounted to filter waste water. Besides, an air hose is placed on a roadway or a sidewalk to supply air to an air room by step force. The air passes through a bubble hole plate 5 at the top of the air room to form bubbles, purifying water. A drainage ditch installed upstream of the tank filter is provided with a shield plate 3 and covered all over with natural stones, etc., as the filtration methods. A waste water passages are provided to the sedimentation tank and the tank filter.</p> |
