Nature-Based Solutions for Water Treatment

Nature-based solutions (NBS) are playing an increasingly important role in improving water quality across the UK. They use natural processes, materials, and ecosystems to remove pollutants from freshwater and wastewater while delivering wider environmental benefits.

Common examples include:

• Constructed wetlands
• Reed beds
• Treatment ponds
• Riparian buffer zones
• Floating treatment wetlands
• Natural filtration systems

These approaches can help reduce nutrients, improve river health, capture sediments, and support biodiversity.

Benefits of Nature-Based Solutions

Nature-based solutions offer several advantages:

• Improve water quality
• Support biodiversity and habitat creation
• Often require lower energy inputs
• Integrate well into natural landscapes
• Contribute to wider environmental goals

For many catchments, farms, reservoirs, and wastewater sites, nature-based treatment can form an important part of long-term water management strategies.

Limitations of Nature-Based Solutions

While highly effective in many situations, nature-based solutions are not always suitable for every site.

Potential challenges can include:

• Large land requirements
• Variable performance due to weather and seasons
• Long establishment periods
• Ongoing vegetation and habitat management
• Limited suitability in constrained or urban locations

As treatment requirements become more demanding, some sites may require additional flexibility, control, or treatment performance.

Why a Hybrid Approach May Be Needed

In some situations, combining natural treatment processes with targeted infrastructure can provide the best outcome.

Hybrid systems can be particularly useful where:

• Land availability is limited
• Nutrient loads vary significantly
• Consistent treatment performance is required
• Faster deployment is needed
• Easier monitoring and maintenance are important

Rather than replacing traditional nature-based solutions, a hybrid approach can complement them by combining the benefits of natural systems with the practicality of engineered deployment.

Rookwood’s ‘Hybrid’ Nature-Based Approach

Your could describe our technology as a hybrid nature-based solution.

Our PRM® technology uses a naturally derived phosphorus recovery material to capture nutrients directly from water. Like many nature-based solutions, the treatment process relies on natural materials and nutrient interactions rather than intensive chemical treatment.

The difference is how the material is deployed.

PRM® operates within modular, reusable, and non-permanent infrastructure that allows systems to be installed, monitored, maintained, and scaled more easily than many traditional land-based treatment solutions.

This approach combines:

• Natural treatment materials
• Direct phosphorus removal
• Nutrient recovery and reuse
• Modular infrastructure
• Flexible deployment

Recovering Nutrients, Not Just Removing Them

A key feature of Rookwood’s approach is nutrient recovery.

Traditional treatment systems often focus solely on nutrient removal. Our systems are designed to capture phosphorus before it reaches rivers and waterways and recover it for productive use.

Recovered phosphorus can then be returned to agriculture through Lifted P®, helping support a more circular nutrient economy.

This creates environmental benefits while reducing the loss of valuable resources.

A Practical Solution for Water Quality

Rookwood’s technology is designed for use across:

• Wastewater treatment sites
• Reservoirs
• Lakes and rivers
• Agricultural water systems
• Nutrient neutrality projects
• Industrial water treatment applications

By combining natural materials with reusable infrastructure, our hybrid nature-based approach helps improve water quality, reduce phosphorus pollution, recover valuable nutrients, and support more sustainable water management.

We believe the future of water treatment is not choosing between nature and technology, but combining the strengths of both.