Intelligent solution: Desulphurization with fuzzy logic.

Fuzzy logic is a method of artificial intelligence used to integrate complex expert knowledge into an automated system in an easy and efficient way. 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 collection rate of biogas is reduced. Therefore the air supply has to be effectively regulated. In fully automated mode the Awite process analysis system measures the concentration in the biogas of

• hydrogen sulphide
• oxygen

and controls the 

• allowed value of oxygen
  
• amount of air supply needed

with the ultimate aim to

• keep the concentration of the hydrogen sulphide as low as possible
• reduce costs
• achieve a high process stability
• account for marginal losses of substratum