What is SED
SED (Selective Electro-Dialysis) is an EPA approved solution to remove nitrates from large-capacity ground and surface water sources of 100,000,000 gallons per year and up. The process is environmentally-friendly and energy efficient.
The SED process is simple and straightforward:
Feed water is filtered and pre-treated to remove dirt and micro-pollutants
Water flows into the SED stack, where nitrate is separated from the water
95% of the water, clean to the level of drinking water standards, are sent to the water infrastructure
When needed, further modules can be added, such as chlorination, fluoridation and water softening.
The remaining concentrate of 5% is washed out.
SED uses an electrical process to separate nitrates from the water and concentrate them in separate cells. It can replace traditional technologies such as Reverse Osmosis or Ion Exchange with a simple process that typically includes only pre-treatment followed by a membrane stack to produce drinking water of the highest quality.
- Less energy: SED works at a low pressure of 2-3 bars which contributes to higher energy efficiency.
- Less chemicals: No chemicals are used in the feed stream or to restore minerals to the product stream. Chemicals are only used to treat the concentrate.
- Less maintenance: SED stacks are robust and work continuously at full capacity with 99% availability.
- Command & Control: a sophisticated system allows remote reading of plant data in real time through the web and immediately alerts technicians to any problem.
to receive Nitron whitepaper: The Use of Selective Electro-Dialysis for Nitrate Removal from Ground Water