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CE 701 Biofilm Process
Education / GUNT Hamburg / Process Engineering / Water Treatment /

The fixed biofilm process is an aerobic, biological process. CE 701 provides a detailed demonstration of this process. 
  A pump delivers the raw water from a tank to the upper end of the trickling filter. The trickling filter contains a fixed bed made of a special carrier material. A thin layer of microorganisms (biofilm) forms on this carrier material. A rotary distributor is used to distribute the raw water evenly over the fixed bed. Oxygen can be supplied to the microorganisms in two different ways: by natural convection or with a compressor. Detached parts of the biofilm are subsequently separated from the water by sedimentation in a secondary clarifier. Part of the treated water can be recirculated.
  The distributor speed is adjustable. Samples can be taken at all relevant points.


Learning Objectives / Experiments

- Learning the fundamental principle of the fixed biofilm process
- Plotting of concentration profiles
- Comparison of various carrier materials


[1] Biological, aerobic water treatment by the biofilm process
[2] Trickling filter with secondary clarifier
[3] Two aeration variants of the trickling filter
[4] Adjustable distributor speed
[5] Flow rates adjustable


Technical Data

Trickling filter
- diameter: approx. 600mm
- height: approx. 600mm
- capacity: approx. 160L

- max. speed: approx. 20rpm

- raw water: approx. 200L
- treated water: approx. 80L
Raw water pump

- max. flow rate: approx. 25L/h


Dimensions and Weight

l x w x h: approx. 2000 x 790 x 1700 mm (trainer)

l x w x h: approx. 1300 x 790 x 800 mm (supply unit)
Weight: approx. 200 kg

Required for Operation
230V, 50Hz, 1 phase
Scope of Delivery

1 trainer
1 supply unit

1 set of hoses

1 set of carrier material
1 set of instructional material

Order Details
083.70100  CE 701  Biofilm Process