Fuzzy Logic Desulphurization

Low concentrations of oxygen in the biogas result in a biological desulphurization process. However, if the oxygen concentration is too high, the whole system can be damaged and the yield rate of biogas is reduced. Therefore the air supply has to be effectively controlled.

In fully automated mode the AWITE process analysis system measures the concentration in the biogas of

  • hydrogen sulphide
  • oxygen
and controls  
  • allowed value of oxygen
  • amount of air supply needed
in order to achieve
  • low concentration of sulphur
  • low costs
  • high process stability
  • marginal losses of substratum

Fluctuating oxygen concentations WITHOUT FUZZY logic control:


Consistent oxygen concentration WITH FUZZY logic control:





Display 'Controller Settings'.
Controller 1 is set to fully automated operation (set point value for oxygen and P/I-part of the controller are set automatically),
controller 2 is set to completely manual operation. By clicking “MAN“ you can switch to manual operation, using “AUTO“ puts you in automated mode.



 

Awite Entschwefelung