Fixed Bed Biofilm Reactor - Operating Principle and Advantages (Video Tutorial)

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Fixed Bed Biofilm Reactor - Operating Principle and Advantages (Video Tutorial)

Operation principle of an FBBR (fixed bed reactor) – Video tutorials from AET LLC 

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About the FBBR process:

FBBRs – fixed bed biofilm reactors are a commonly used technology for BOD and ammonia removal in wastewater treatment. In comparison to activated sludge, FBBRs are less sensitive for volatile flows, interrupted aeration or grease leaks which makes them a good fit for industrial applications such as food and beverage, dairy, chemical and others. 

FBBRs consist of two main components: Plastic fill media and aeration diffusers. 
Depending on the BOD and ammonia loading, different fill media designs are selected. However, in most cases a vertical flow channel design will provide enough surface area and reduces the risk of clogging. 
The submerged Biofilm on the fill media surface needs oxygen for BOD and ammonium removal processes. The oxygen is supplied by the aeration diffusers. 

The first microorganisms will settle after about two weeks on the fill media surface. For further biofilm growth, microorganisms digest organic waste (BOD) and consume the oxygen supplied by aeration diffusers. 
Only after all BOD is removed, the oxidization of ammonium NH4+ to Nitrite No3- can begin. 
In the first step microorganisms facilitate the oxidization of NH4+ to NO2- Nitrite, H+ Acid, Water and ATP.  Then in the second step Nitrite is further oxidized into NO3- Nitrate and more ATP. 

Our advantage: 


A wide turndown range of our aeration diffusers allow a flexible operation. This is very important when:

 

  1. Less BOD and ammonia are present. Reducing the oxygen supply will decrease energy costs but keep the same effluent results. 
  2. More BOD and ammonia are present. Increasing the oxygen supply will lead to more BOD and ammonia removal so that no other upgrades are needed. 
  3. Too much biofilm occurs so that the fill media might clog. Raising the oxygen supply a lot will result in a scouring effect and clean clogged channels. The scouring process can also be automized by programming a VFD for certain time intervals according to our instructions. Furthermore, for energy savings, the oxygen supply can be minimized by monitoring DO, BOD and ammonia levels.    
     

Attached link

http://www.youtube.com/embed/hqxvkt-tEwA

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