| 摘要 |
<p>PURPOSE: To clean and treat drainage containing many SS components at a high degree without clogging by comparting the inside of a vessel into a plurality of small chambers by partitions having a connection hole and forming these small chambers into an anaerobic chamber, an aerobic chamber and a buffer chamber in order from the upstream side. CONSTITUTION: The inside of a vessel 1 is formed into an anaerobic chamber 4, an aerobic chamber 5 and a buffer chamber 6 from the left side in the figure by comparting the inside of the vessel 1 into three small chambers by partitions 2, 3. Raw water is supplied to the anaerobic chamber 4 and passed through the aerobic chamber 5 and allowed to flow into the buffer chamber 6 through the respective connection holes 2a, 3a and cleaned. Floating filter medium 9 which consists of irregular plastic foams and holds anaerobic bacteria and denitrification bacteria is filled in the anaerobic chamber 4 and a floating filter layer 10 is formed. An inhibitor 16 for washing away of the filter mediums is provided in the upper part of the aerobic chamber 5. A floating filter layer 15 is formed by filling the floating filter mediums 9 in the downside thereof. In the aerobic chamber 5, drainage is introduced from the bottom and fluidized upward together with bubbles discharged through diffuser nozzles 14. Drainage introduced into the buffer chamber 6 through the connection hole 3a of the upper part of the aerobic chamber 5 is temporarily stored and thereafter discharged from a treated water pipe 20.</p> |
