| 摘要 |
PURPOSE:To always perform the blow-in of air according to a set schedule, by suspending a self-suction type aeration apparatus with a float in a building drain tank and providing a draft tube to the lower part of the aeration tank. CONSTITUTION:An aeration apparatus 4 consists of a float 5, the drive apparatus 6 provided on said float 5, a stirring blade 7 and a draft tube 8. The float 5 is provided so that the stirring blade 7 is always positioned at a required depth from a liquid surface and the drive apparatus 6 is always positioned above the liquid surface and revolves the drive shaft piercing through a hollow shaft 9 from the drive apparatus 6 to revolve the stirring blade 7. A bracket 10 is vertically provided from the float 5 and the upper part of the draft tube 8 is engaged with the bracket 10 to vertically suspend the draft tube 8. The stirring blade 7 is driven to generate negative pressure in the liquid to suck air is from a suction port 11 by utilizing negative pressure. By this method, anaerobic fermentation can be prevented. |
