Evaporation

To concentrate fluids to reach a certain dry matter content, evaporation is often applied. 

It is mostly used in combination with spray drying, so as less water as possible needs to be removed with the spray dryer. Also a heater can be combined with an evaporator, to include for example a pasteurization step, just before or after evaporation. 

In the NIZO Pilot Plant, we have various evaporation equipment with different capacities:

• NIRO 
  = 4-stage falling film evaporator with 300-2000 l/h capacity
• Holvrieka
  = 4-stage falling film evaporator with 250 l/h capacity
• NIRO
  = Experimental 1-stage falling film evaporator with 40 l/h capacity
• Alfa Laval Convap
  = Scraped surface evaporator with 100-200 l/h capacity 

Examples of products for evaporation:

• condensed milk
• fermentation products (enzymes)