Outlet
Air inlet pipe
Water surface
Outlet
Air inlet pipe
Water surface
Outlet
Air inlet pipe
Water surface
Air
Outlet
Air inlet pipe
Water surface
A green part is the part of water fixed transfered.
Outlet
Sewage inflow
Water surface


(B)○Automatical backwash action operation cotroled by timer one time a day. Excess sludge in floating media are washed out by backwash action. This operation system is our original patented technology.

<Patented Mechanism of backwashing>
Air supply to backwash chamber is started at the time of timer set.
When air level reach to the bottom release pipe, pressure of backwash chamber is released suddenly to atmosphere .
Then water in bio-filter chamber current in to backwash chamber.
And media in the bio-filter is washed out.

Backwash method
●Patent:No.2975269 (Basic patent)
●Patent:No.4814964 (Application patent)

Air (bubble)
SS・separated sludge 
Biological film
floating media
Air
Sewage
          ○ Steady transfer even water depth of the tank is low.
       With big equalization fanction. ○Patent:No.3105128

(A)○Anaerobic media bed and biological filtration are combined and biological treatment and physical filtration are done at same time. Trasparency of treated water become 30 to 50cm for short time when waste water pass throgh up floating media.
      

○No media blocked by excess sldge because of upflow biological filtration.
○Biological floating media filtration system could achieve high performance steadily.

○Floatin g media filtration could hold ammount of microorganism inside
○Most effecive performance for biological waste water treatment.
  

○Ordinary domestic waste water volume is usually concentrated morning and evening time. Our patented equalization system could solve and make discharge flow even.
○Efective function of equalization pump system as show in data.