WASTE WATER TREATING DEVICE

摘要

PURPOSE:To enhance the treating efficiency in a biological waste water treating vessel and also to provide the waste water treating device easy in maintenance and low in cost. CONSTITUTION:This waste water treating device 1 is provided with an anaerobic organism fixed vessel group 2 and an aerobic organism fixed vessel group 3 disposed in line with the fixed vessel group 2. In the device 1, each of the organism fixed vessel groups 2 and 3 is provided with the tubular plastic net 20 as a contact material and the panel 21 fixing the both ends of the pipe opening of the tubular plastic net 20 disposed vertically or horizontally at regular intervals for every plural number of the nets so that the ratio of the total sectional area in external diameter of the net 20 may be about 40-60% per the sectional area of the vessels 2 and 3. Moreover, the crossing part of the single yarn constituting the net 20 is fused integrally in each tubular plastic net 20, and the width of the single yarn is about 3-8mm, the size of the mesh is about 15X15 to 50X50mm and the surface area per 1m<3> volume is 40-70m<2>.