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Aquaculture Water Treatment from Clearwater Carbon Capture

This may be the first year on record that people eat more fish raised on farms than caught in the wild. However, fish farming is confronted with serious sustainability challenges.

These include:
  • Toxic levels of ammonia which constrain fish populations
  • Use of large tracts of land to reduce toxics
  • Heavy antibiotics use to limit bacterial and pathogens
  • Viral outbreaks which can shut down entire farms
  • Pollution of incoming water with organic contaminants
  • Fouling of discharge waters
A simple solution to these problems will greatly assist the expansion and viability of this $100 billion-plus global industry.


The Electro Water Separation™ (EWS) technology can significantly improve ammonia removal rates, disinfection in aquaculture systems, and improve economics of aquaculture.

The tube on the left displays toxic ammonia levels. The tube to the right, after EWS treatment, demonstrates that the ammonia has been eliminated.

The process is called EWS Aqua™, which reduces levels of ammonia and bacteria in real time by continuously re-circulating pond water through a low-voltage electro pulsing process.

While reducing ammonia, EWS Aqua can also simultaneously reduce bacteria and aquatic animal pathogens, without the use of antibiotics or other harmful chemicals.

It achieves this with a four stage process. The first stage is a solids remediation system to reduce turbidity, total suspended solids and gross material down to the 3-5 micron level.

The second stage EWS reactor electrochemically oxidizes the ammonia to nitrogen gas. This stage also creates reactive ionic species to reduce bacteria levels.

The third stage includes a reducing media filter, which removes some algae, microorganisms and other contaminants from the water, including heavy metals.

The fourth stage is a final water polisher, able to filter to the sub-micron level.

The process is extremely efficient: under typical conditions, EWS Q60 can maintain low ammonia and pathogen levels, keeping a healthy culture environment for a 50,000 litre system, by processing 20% of the volume daily, while consuming less than 20 kWh per day (about $2.40/day).


If an operator wants to grow algae for economical and healthy feed, then EWS Algae™ can help them recover over 95% of algae from ponds, reducing overgrowth and generating concentrate which can be pelletized for feed.

Algae product harvested with EWS Algae achieves extended shelf life through very low bacteria levels. EWS Algae is highly energy-efficient, and uses no chemicals.

EWS Aqua may also be able to supply fertilized water for enhanced algae growth.


Where pond supply water is polluted, EWS Waste can effectively clean incoming organics such as petroleum, achieving clean and sanitized pond inflows with reductions of up to 99.9% in free oil, 99.5% in suspended solids, and 98% in bacteria levels.

For discharge of pond water into rivers and oceans, EWS Waste can help producers meet regulatory requirements, and reduce wastewater processing fees.

                                               "When the well is dry, we know the worth of water" BENJAMIN FRANKLIN (1706-1790)

© Clearwater Carbon Capture Limited, 2015