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Advantages of clarifiers to clarifying milk using filters

One of the biggest drawbacks of filters is the drop in flow rate over time because a thicker and thicker filter layer builds up. Running time is limited. The entire milk flow is passed through the filter layer. This allows bacteriological problems to arise due to entrainment; there is a risk of bacterial growth in the filter layer and thus reinfection of the milk. What is more, if there are cracks in the filter tissue, the clarifying effect is considerably reduced. Cleaning the filters after production is also an extremely laborious process.

Customer benefits

GEA generally supplies clarifiers with a hydrosoft feed system. This system combines the benefits of the GEA softstream and a hydrohermetic feed.

• Adequate flow cross-sections mean low feed pressure
• Optimum design means great flexibility with regard to feed quantity
• No ribs in the feed chamber mean no shear forces – gentle product treatment
• Hydraulic seal means no air trapped in product

Processes in the disc interspace

The large number of individual separation chambers arranged in parallel between the discs divides the milk stream into many thin layers. This minimizes the sedimentation route. A solids particle is considered separated once it has reached the bottom disc surface of the top disc. Flow speed is low here. The particle is no longer entrained with the flow, but slides outwards under the influence of centrifugal force. At the end of the disc, it leaves the separation chamber.

Bowl ejections

In addition to providing adjustable partial ejections, the GEA ejection system also allows the bowl to be emptied completely.
 
With total ejections, the complete bowl contents are discharged. The feed to the separator has to be interrupted briefly to do this. Total ejections clean all the surfaces inside the bowl due to the very high flow velocities. This is particularly important for chemical CIP of the line and separator. Total ejections of a separator during CIP guarantee optimum results.

Available machine types

Clarifiers for milk or whey with flat belt drive

• GEA ecoclean 
• MSE

Clarifiers for milk or whey with integrated drive

• MSI

 Clarifiers for the recovery of calcium phosphate

• MSC

The hygienic design is certified by 3-A sanitary standards. 

Capacities

Milk or Whey

• GEA ecoclean:
  Milk or whey clarifying: 3,000 l/h - 15,000 l/h 
• MSE / MSI:
  Milk or whey clarifying: 10,000 l/h - 75,000 l/h
  
• MSC:
  Clarifying capacity of DCP: 3000 l/h - 9000 l/h