Advanced purification solutions for starch syrups using Electrodialysis (ED) technology. ED effectively removes ionic impurities such as salts and acids from syrups, enhancing their purity. This method is energy-efficient and minimizes waste, supporting sustainable production. Our systems are customizable and scalable, designed to meet the specific needs of glucose, fructose, and maltose syrup producers. With automated controls and user-friendly interfaces, our ED systems ensure consistent, high-quality production with minimal manual intervention.
Process description
An electric field gradient‑driven process enables the separation of minerals from the feed solution. This is achieved by moving dissociated ions through ion-permeable selective membranes, thereby forming two different flows: a demineralized flow called diluate, and a concentrated flow called concentrate.
Substances without a permanent positive or negative electrical charge, such as sugars, do not pass through the membranes during the process. Therefore, purification of saccharide solutions can be achieved with minimal or no product losses.
Advantages of process:
- No dilution and subsequent thermal concentration compared to IEX.
- 2–3× less waste produced compared to IEX columns.
- Return on investment 1–3 years (depending on product and level of demineralization).
- Solution suitable for organic production (IEX is no longer accepted in the EU).
- Technology can be made continuous, saving on accessories for the batch process; no recirculation means a reduced number of pumps, valves, instruments, etc.
- Mature and tested technology.
- Highly reduced requirement for chemicals, minor compared to IEX columns.
- Membranes with the highest lifespan on the market.
- Automatic membrane systems.
Typical operating parameters for starch syrups purification by electrodialysis
- Temperature: approx. 60 °C.
- Feed conductivity: 0.5–2.5 mS/cm.
- Minimal achievable conductivity: 15 µS/cm.
- Average stable product conductivity: 25 µS/cm.
- Additional steam waste condensate required: approx. double the feed volume.
- Approx: 1–4.9 kWh per 1 ton of product (liquid).
- Negligible requirement for chemicals for CIP: (HNO3 + NaOH).
- Product losses: approx. 4–5 % (liquid).
We provide full installation and ongoing support to maintain optimal system performance. Contact us for more details and to discuss your specific requirements.