Water Sustainability with On‑Site Tech

A Practical Shift Toward Sustainable Water Use 

Water treatment systems often depend on external chemical supplies that travel long distances before reaching the point of use. CIWI, a startup based in the Netherlands, offers an alternative approach that aligns with long-term water sustainability goals. Instead of relying on deliveries, its process creates treatment agents on location, using only salt, steel, and electricity. 

This system supports water facilities in treating wastewater or process water more efficiently. It reduces transport, lowers chemical storage needs, and helps manage environmental impact. By moving production closer to the point of use, the technology offers a cleaner and more consistent way to maintain water quality. 

How the Electrochemical System Works 

CIWI’s unit uses a low-voltage current to convert steel plates into metal hydroxide inside a brine solution. This reaction takes place within a container and connects directly to water treatment equipment. The produced hydroxide helps remove substances like phosphate or hydrogen sulfide from the water. 

Because the process runs on-site, there is no need to store or ship iron salts in bulk. The system works continuously, adjusting its output as needed. This makes it a useful option for facilities looking to reduce operational complexity while still achieving effective results. 

Supporting Water Sustainability Through On-Site Treatment 

Traditional water treatment often involves complex supply chains. CIWI’s system shortens that process by producing what’s needed exactly where it’s needed. This kind of on-site treatment strengthens supply chain resilience and gives operators more control. 

At the same time, the system reduces waste. It uses energy efficiently and avoids excess byproducts, which can add cost and strain to downstream treatment steps. With fewer materials transported and stored, it also improves safety and lowers carbon emissions. 

A Local Model with Broader Applications 

This innovation is already in use at a Dutch utility, providing a portion of daily treatment needs. The ability to operate independently, with simple inputs and modular design, makes it a strong candidate for wider adoption. Especially in regions with limited infrastructure, producing treatment chemicals on-site offers a more adaptable solution. 

As cities and industries adjust to long-term resource pressures, tools like this one support the shift toward more stable, sustainable water systems. Its small footprint and low resource demand make it a practical fit for a range of facilities.