Innovative Solution in Desalination That Makes Seawater Drinkable

The challenging task of transforming seawater into drinkable water has long been an uphill battle. Traditional desalination processes are energy-intensive and environmentally problematic. Yet, a company named Oneka Technologies is now championing an innovative, eco-friendly approach to this issue.

Source: Practical Engineering/YouTube

Back in May 2022, California officials rejected a $1.4 billion proposal for a desalination plant, citing concerns about cost, potential marine environmental harm, and unsustainability. However, Oneka Technologies offers a promising alternative: a sustainable, practical, and green desalination solution.

Located on California’s North Coast, the small city of Fort Bragg is becoming the testing ground for this venture. Water is scarce in Fort Bragg, with the Noyo River and its two tributaries being the only surface-water sources. In dry years, water shortages pose a significant risk, pushing the city to look toward the ocean for solutions.

Oneka’s water desalination device is a buoy that works off ocean power. The buoy’s movement with the waves allows it to filter seawater, using reverse-osmosis membranes to extract salts and other small particles. Not only is this method remarkably sustainable, but it’s also surprisingly simple, according to John Smith, Fort Bragg’s director of public works.

Furthermore, the Oneka buoy solves another environmental issue. Standard desalination processes yield a salty byproduct called brine that must be responsibly disposed of. However, the buoy produces a low-concentration brine that can be safely discharged back into the ocean, minimizing environmental impact.

Oneka has already implemented this technology off the coasts of Florida and Chile, continually refining its design based on encountered challenges. The Fort Bragg installation is set to produce up to 50,000 liters of fresh water daily. While not a complete solution to the city’s water problems, this project serves as an encouraging proof of concept, demonstrating how technology and engineering can help combat water issues sustainably.

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