Water cleaning electrolysis offers a unique solution for conditioning acidic water streams with high sulfate loading, a challenge often faced in the course of renaturation of abandoned open pit mines.
In the conditioning plant the acidic water is fed to electrolysis cells while using anion selective membranes to force sulfate ions from the cathode to the anode side. This raises the pH level of the treated water to a level suitable for domestic use.
Using water cleaning electrolysis permits several conditioning goals to be pursued at the same time: the separation of sulfate, an increase in the pH level and the precipitation and sequestration of heavy metals without adding precipitation agents.
The concentrated sulfate solution serves as feedstock for fertilizer production. It can be sold and therefore create revenue which contributes to the economic feasibility of the process. Finally, operating the electrolysis plant dynamically offers balancing services to the electricity grid. It helps to mitigate fluctuations induced by renewable electricity generation and is easily integrated into regional economic development concepts.
Benefits of water cleaning electrolysis
- Separation of sulfate from acidic water streams
- Increase in pH level to 7-8
- Sequestration of heavy metals
- Generation of product streams instead of waste streams