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Passive Silt Treatment System

In-ditch Polishing Point 

Our bio-engineered In-ditch Polishing Point works within the parameters of existing site infrastructure to create a gravity-fed treatment point for fine, mobilised silt particles, typically generated by clay-rich subsoils.

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This passive system requires no pumps or power, making it a low-carbon, low-maintenance solution for controlling silt in ditches, swales, and areas where silty water collects.

Multiple units can be deployed on a site for scalable treatment.

Designed for quick deployment, our In-ditch Polishing Point system is made up of three of our complementary designed products:

  • Floc Mat® – a heavy duty mat containing anionic flocculant to bind suspended particles
  • Silt Wattle – a permeable barrier that slows the flow and improves treatment
  • Silt Mat™ – a 12 kg capture mat that traps fine particles and reduces resuspension

A In-ditch Polishing Point is often used for:

  • Construction drainage
  • Roadside and rail swales
  • Temporary works areas
  • Sites with clay-rich or fine soils
  • Emergency silt control following rainfall
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Key Benefits

We design solutions that work with your site infrastructure and save you money:

Low-carbon, passive treatment

We’ve designed a system that uses no power or pumps to turn large volumes of dirty water, crystal clear to comply with environmental regulations.

Scalable design

Multiple treatment points can be created depending on water quantity, flow and site conditions.

Quick and easy to install

Our In-ditch Polishing Point works with site infrastructure, making use of existing ditches to form a vital part of the treatment system. Watch our installation video to see how easy it is to deploy and dispose of once finished.

Environmentally-friendly design

This product is designed to protect your site and protect the environment. We use robust, biodegradable materials to help minimise waste.

Erosion prevention

This system reduces erosion and prevents bypass flow when installed correctly.

Treats complex sites

This system is effective for treating clay-rich and fine silts that are difficult to manage with other measures.

Question?

Frequently asked questions

Got a question about any of our products or services? Check out our FAQs, or give us a call:

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“Thanks to Frog’s technical expertise and insight, we have found new ways to tackle these common issues and improve our site water management practices – from company-wide awareness and training to monitoring and prevention. As a consequence, we have made significant cost savings and lowered our carbon emissions.” 

Paul Thomas, Head of Environment
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“The results (of the bubble curtain) were quite dramatic – in fact, startling… we have a workable solution that we’ve proved has a dramatic impact on noise propagation.” 

David McLaren, Site Manager – Marine & Civils
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It’s good to see Frog getting involved with GT at the earliest stages of the project to help with planning out water management in advance of needing it.

Galliford Try

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I really enjoyed learning how to identify which measures are best suited to the site conditions.

TACP (UK) Ltd

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“Frog Environmental were knowledgeable, helping to establish a workable, cost-effective and low maintenance solution for site approved by the regulator. They really understood the water management issues we had on site and worked with us to develop a solution which works, as well as engaging with our operatives to ensure that they could effectively manage the system.

We are delighted to have found a solution that prevents pollution and protects the environment, and ultimately allows us to continue with construction.”

Glenn Entwistle, Senior Environmental Advisor
Advance JV

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The surface water system drainage feature utilised innovative solutions from Frog Environmental.

A rain-ready strategy was implemented, which enabled the development of a robust management system capable of effectively managing fluctuations in weather conditions year-round.

This provided a timely, sustainable and cost saving solution for our client.

Anthony Jordan
RSK Geosciences

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“The positive impact of your business on the wider industry is incredible. You have upskilled so many of us and definitely improved water quality across UK construction sites!”

Bernadette Anderson, Environmental Manager
VolkerLaser

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Frog’s commitment to develop innovative, market-leading strategies to help their construction clients take responsibility for their sites has and is inspiring an industry-wide change in management culture to improve environmental practices. Of note is their “Rain Ready” water treatment system which is setting new benchmarks in environmental excellence.

Brad Griko, VP Operations
Clearflow Group

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“The systems were very effective, and we can see how they could be used on other projects. Being able to talk through the scenario with Frog Environmental was really helpful… We were so pleased to be able to proceed with this essential works with no disruption to either wildlife or our workplan, it saved us time, money, and provided peace of mind that we had taken effective steps to protect the environment.”

Huw Williams, Site Agent
Morgan Sindall Infrastructure – Water & Highways

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They (Frog Environmental) were efficient in providing advice and the most appropriate product for our project. The team responded promptly to ensure the Bubble Curtain was delivered to the site on schedule.

It has worked well and has been great on site. We are demobilising this week, and the bubble curtain is already in store at our next site for reuse!

Hayley Jackson, Site Agent
Coffey Group

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The Kex Gill road realignment scheme is a challenging project with multiple environmental risks including management of silt and water quality of the surrounding environment given the locality of designated sites.

Frog Environmental are providing us with extensive technical support, including the design, supply and install of their silt control products on site to ensure the project minimises risks to the watercourses in the project vicinity and prevents impact on highly sensitive aquatic species.

It’s great to be working with them and we’re delighted with the success of the whole project.

Georgina King, Associate Director
RSK Environment

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