Eurodia has a good experience in whey demineralization. Its first plant was built in 1989. Since then, 27 other plants have been supplied. Eurodia provides complete processes to obtain demineralized whey as final product, or as an intermediary for other value-added products, such as lactose or whey proteins.
The Eurodia processes take advantage of three of its technologies:
Nanofiltration
Electrodialysis
Ion Exchange resin
Each technology has its own advantages and
disadvantagess:
Nanofiltration
|
Advantages
|
Disadvantages |
| Concentration of dry solids |
Increase the concentration of bivalents |
|
Partial demineralization (removal of
monovalent ions) |
High potential for micro-organism development |
Electrodialysis
|
Advantages
|
Disadvantages |
| Low pollution load (no salt added) |
No concentration effect |
| Require no chemicals for regeneration |
|
| Does not have ion selectivity |
|
| Can achieve several demineralization rates |
|
Ion exchange resin
|
Advantages
|
Disadvangates |
| Remove all ions |
High volume of effluents |
| Low capital costs |
High amounts of chemicals for regeneration |
| |
High losses of valuable products (proteins) |
Eurodia/Ameridia’s engineers designed a process
that uses a combination of these technologies. Thus this combination allows
- The lowest operating costs
- To preserve the quality of valuable products by avoiding microbiological development and thermal shocks
- To maintain as high as possible the yield of dry solids and products
- To take into account the downstream process steps (evaporation, WPC, lactose, spray drying…)
- To optimize the technology, materials, instruments
- To meet the requirements of FDA and 3A
- To meet the requirements for processing Organic Whey
Capabilities of the Eurodia demineralization processes, starting from liquid whey:
|
PROCESSES |
|
|
NF |
ED |
EUDEM 70
EUDEM90 |
|
DEMIN RATE |
35 % |
EFFICIENCY |
+ + + |
+ + + + |
|
|
MICROBIOLOGY QUALITY |
- |
- |
|
|
MEMBRANE LIFE |
6 000h |
8 000h |
|
|
50 % |
EFFICIENCY |
|
+ + + |
+ + + + |
|
MICROBIOLOGY QUALITY |
|
- |
+ + + |
|
MEMBRANE LIFE |
|
6 000h |
NF 6 000h
ED 12 000h |
|
70 % |
EFFICIENCY |
|
+ + |
+ + + + |
|
MICROBIOLOGY QUALITY |
|
- - |
+ + + + |
|
MEMBRANE LIFE |
|
5 000h |
NF 6 000h
ED 12 000h |
|
90 % |
EFFICIENCY |
|
|
+ + + + |
|
MICROBIOLOGY QUALITY |
|
- - - |
+ + + + |
|
MEMBRANE LIFE |
|
2 500h |
NF 10 000h
ED 17 000h |
This Table illustrates on average the capabilities of operating plants.
Calculation of operating and investment costs
(in Euros)
DEMIN RATE |
PROCESSES |
OPERATING COSTS |
INVESTMENT COSTS |
TOTAL COSTS |
50 % |
ED ALONE |
0.093 €/kg |
|
0.093 €/kg |
|
EUDEM 70
NF WHEY |
0.061 €/kg |
0.036 €/kg |
0.097 €/kg |
|
EUDEM 90
NF WHEY |
0.040 €/kg |
0.044 €/kg |
0.084 €/kg |
70 % |
ED ALONE |
0.130 €/kg |
|
0.130 €/kg |
|
EUDEM 70
NF WHEY |
0.080 €/kg |
0.030 €/kg |
0.110 €/kg |
|
EUDEM 90
NF WHEY |
0.049 €/kg |
0.047 €/kg |
0.096 €/kg |
The operating costs have been calculated taking into account:
- For each process:
- The same final product dry solids
- The same final product demin rates
- Product yields
- For each step:
- Consumption of chemicals
- Water consumption
- Electricity consumption
- Membranes/resins life
- Electrode consumption
The investment costs have been calculated assuming a 3-year depreciation, excluding membrane, labor, and raw material costs.
For More
Information about the Technology |