Flocculant in Water Treatment
Gel Flocculant for Silt Control
Gel Flocculant is a highly effective and environmentally safe way of introducing flocculant into ditches, drains, pumped discharges or effluent streams to cleanse muddy water and trap silt and other contaminants like nutrients, metals and hydrocarbons.
Gel Flocculant is a safe, solid gel block flocculant that activates on contact with flowing water.
It’s unique formulation encourages fine silts and mobilised clay to clump together, settle and be captured, providing low carbon, highly cost effective water treatment on construction sites.
Unmade ground on construction sites are particularly vulnerable and without adequate protection, rain will lead to fine particles of clayey soil and silt being carried long distances off site into streams and rivers causing pollution and harm to aquatic ecosystems.
At Frog Environmental, we’re proud to be the exclusive UK and European partner for Clearflow Group’s Gel Flocculant and GFR water treatment systems.
- Construction and infrastructure sites
- Runoff attenuation features
- Agricultural and forestry operations
- Enhance artificial dispersion
- Mining & quarrying operations
Key benefits
Environmentally safe, crystal clear water that meets regulatory compliance
Rapid silt settlement
Accelerates sedimentation from hours or days to seconds
Highly economical
Whole life costs considerably lower than tank-based system alternatives, reducing long term project expenditure
Passive and self-dosing
Operates without pumps or dosing systems, dissolves only in turbulent flow
Versatile deployment
Effective in ditches & drains as well as pumped systems using Clearflow GFR or Pipe Reactors.
Highly economical
Non hazardous gel which is fish safe and is cited on countless environmental permits across the UK
Engineered for sites
We supply a few different variations of flocculant to suit your site’s soil chemistry. Our Technical Team will help you to determine the best set up depending on your site and project.
Technical specification of Clearflow’s Gel Flocculant:
| Form | Dehydrated gel blocks, with multiple formulations tailored to different soil chemistries. |
| Site specific specification and testing | Deployment methodology, whether pumped or passive, is determined by Frog’s technical team following the standard Settlement Test procedure. This helps to ensure correct block specification, optimum installation locations and an appropriate maintenance plan. |
| Deployment options | Coir (80%), Jute (20%) |
| Installation and maintenance | Passive flow systems: suitable for drains, ditches or channels, operate as carbon neutral water treatment for clay impacted waters, offering a unique sustainability advantage. Pumped systems : use Pipe Reactors or Clearflow GFRs for consistent dosing where flows are actively pumped. |
| Whole life costing and carbon performance |
Passive deployments of Gel Flocculant are carbon neutral in operation.
Whole life costs, covering installation, operation and maintenance, are typically an order of magnitude lower than tank based treatment systems. |
Installation Guides
Videos
Resources
GF 360 specification sheet
Gel Flocculant for Silt Control Installation Guide
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GF 394 specification sheet
Gel Flocculant for Silt Control Installation Guide
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GF 398 specification sheet
Gel Flocculant for Silt Control Installation Guide
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GF 494 specification sheet
Videos
Common sources of pollution from construction sites
Hear our experts share common sources of pollution on construction sites, including how it can be washed off sites into water courses and how sediment impacts aquatic life.
Removing silt from surface water
Leela, our Technical Director, explains how sediments and silts can be removed from surface waters using our flocculants.
Applications
Construction site runoff management
Surface water management is a complex, technical challenge but our innovative solutions help to reduce environmental and non-compliance risks.
Find out moreGroundworks
We have a strong track record in supporting groundworkers with products and solutions that balance stakeholder interests with time and budget constraints.
Find out moreWater treatment
We work with market-leading technology partners to deliver cost-effective solutions for the treatment of water that also minimises carbon impact.
Find out moreMining & legacy mines
Using Clearflow Gel Flocculant™, we offer an innovative approach to safeguard freshwater resources from the impact of both active and historical mining sites.
Find out moreRelated
Water treatment products
“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
Case Studies
Real solutions, proven results
Knowledge Hub
Sharing good practice
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Working in Water
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Why it pays to be Rain Ready
Discover how being Rain Ready® can help construction companies manage water quality more effectively
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Zero carbon water treatment systems
In this article we share how our sustainable and practical zero carbon operation water treatment system can protect watercourses and reduce operational costs and carbon footprint for contractors.
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Free Silt Control Toolbox Talk info sheet
We’ve put together a handy planning tool to help your team manage the risk of causing a silt pollution event from your construction site.
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Silt management on construction sites with constrained linear footprints
We make use of interceptor ditches to design passive, low carbon, rain-ready silt management systems for linear construction sites to prevent pollution.
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Effect of check dams on runoff, sediment yield and retention on small semiarid watersheds
A study on check dams.
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Impacts of flocculation on sediment basin performance and design
This study evaluated a system consisting of three fibre check dams in a lined ditch discharging to sediment basins that differed in their configuration.
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Management practices for micropollutant control in road runoff
Management practices for the control of micropollutants found in road runoff: from the “invention” of technical solutions to the “design” of innovative practices.
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Flocculated sediments can reduce the size of sediment basin
Our results suggests that current sediment basin design could be modified when chemically-assisted settling is implemented, taking up less space and cost in construction sites.
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