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CE 300 Ion Exchange
Education / GUNT Hamburg / Process Engineering / Water Treatment /

Ion exchangers are used in water treatment primarily for desalination and softening. CE 300 enables these processes to be demonstrated with the aid of cation and anion exchangers.
  The raw water is pumped from the tank into the top of the cation exchanger. In the softening process the water flows from there back into the collecting tank. To desalinate the raw water, it is then additionally routed through the anion exchanger. From there the treated water passes into the collecting tank. In the regeneration process, acid or caustic is fed into the ion exchangers from below using the same pump. The acid and caustic used is collected in the collecting tank.
  The flow rate of the pump is adjustable, and can be read from a flow meter before it enters the first ion exchanger. For continuous evaluation of the process, a conductivity sensor is installed upstream of the inlet into the collecting tank. The measured values can be read from a conductivity meter. Samples can be taken at all relevant points. Tap water can be used as raw water.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- Learning the fundamental principle of softening

  and desalination by ion exchange
- Identification of the different modes of operation
  of cation and anion exchangers
- Combined use of cation and  
  anion exchangers for desalination

- Exchanging capacities and regeneration
- Verification of the theoretically calculated 
  regeneration time



[1] Softening and desalination with ion exchange
[2] Cation and anion exchangers usable separately and in combination
[3] Regeneration of ion exchangers
[4] Tank with 4 chambers for raw water, rinsing water, acid and caustic
[5] Diaphragm pump to transport raw water, rinsing water, acid and caustic
[6] Collecting tank for treated water, rinsing water, acid and caustic 
[7] Continuous measurement of conductivity and flow rate


Technical Data

Ion exchanger
- material: network polymer
- cation exchanger: H+ form
- anion exchanger: OHform
Diaphragm pump
- max. flow rate: 300mL/min 
- max. head: 10m
- 4 chambers
- capacity: each approx. 5L
- material: PVC
Collecting tank
- capacity: approx. 20L
- material: PVC
Measuring ranges
- flow rate: 20...270mL/min
- conductivity: 0...2000μS/cm


Dimensions and Weight
l x w x h: approx. 610 x 510 x 1010 mm
(experimental unit)
l x w x h: approx. 350 x 350 x 220 mm (each tank)
Weight: approx. 55 kg
Required for Operation

230V, 50/60Hz, 1 phase or

120V, 50/60Hz, 1 phase or

120V, CSA, 1 phase

Scope of Delivery

1 experimental unit
1 tank with 4 chambers
1 collecting tank
1 conductivity sensor
1 conductivity meter
1 packing unit of cation exchanger
1 packing unit of anion exchanger

1 set of hoses
1 set of instructional material

Order Details

083.30000  CE 300  Ion Exchange