
SDS Aqua-Swirl®

Key Benefits
Pollutant Separation System
Surface water drains normally discharge to a watercourse or indirectly into groundwater via a soakaway. Contamination of the surface water by oil, chemicals or suspended solids can cause these discharges to have a serious impact on the receiving water.
SDS Aqua-Swirl® is a unique, custom engineered, flow-through water quality device that provides a highly efficient surface water treatment solution. It utilises hydrodynamic separation technology to maximise the removal of coarse sediment, debris and free-floating oil from surface water runoff.
By combining the SDS Aqua-Swirl® swirl chamber for pre-treatment, with SDS Aqua-Filter™ filtration chamber for secondary treatment, the system maximises the removal of suspended solids by up to 80%. Nutrients, heavy metals and hydrocarbons are removed, therefore, from surface water runoff prior to its final conveyance to a suitable outlet; it also helps to eliminate 40% of total phosphorous.
SDS Aqua-Swirl® can be used as part of a complete water management programme, for example when connected to a SDS GEOlight® stormwater attenuation or infiltration system, in order to capture the majority of pollutants. It can also be used, together with SDS Aqua-Filter™, to extend the lifespan and maintenance schedule of vegetative SuDS like ponds and basins and therefore provide greater protection from contamination of the flora and fauna that these natural features are intended to sustain.
Features and Benefits
Available in nine different standard sizes.
Provides greater design flexibility and assists the removal of sediments at a greater rate than with comparable systems.
Bespoke units can be manufactured.
Satisfies even the most demanding installations.
Manufactured from high strength plastic components with no moving parts included.
Offers a durable, light weight and low-cost alternative to concrete which is easy and quick to install, resulting in substantial cost savings.
BBA HAPAS-certified.
Approved for installation under roads and pavements; adoptable by National Highways.
NJCAT/NJDEP-verified performance for sediment removal and retention.
Verification accepted by the Environment Agency (as cited in the CIRIA C753 SuDS Manual).
‘XC’ models meet NJDEP testing protocol.
Ensures that particulates and adhered pollutants are not mobilised during major storm events, maximising the capture of floating debris, oil and hydrocarbons.
Compact dimensions.
Reduces ground excavation and product installation costs.
Single swirl chamber.
Simplifies inspection and maintenance facilities with no special equipment required.
Large debris and sediment capture capacity.
Limits the amount of maintenance required.
Specialised sealed baffle.
Prevents captured floatables from escaping.
Internal bypass with pollution retention.
Able to treat localised rain and larger storm events while retaining captured pollutants.
Small footprint design.
Can be retrofitted with minimal disruption to existing infrastructure utilities or surface features, extending the ability to meet new regulations.
Certified installation lifting supports.
Easy installation without the need for heavy, expensive machinery.
Suitable for use during site construction programme.
Can be put into operation prior to completion of the site build, with the inclusion of a planned maintenance schedule.
Performance monitoring available via SDS SYMBiotIC™.
Provides bespoke suite of operating data, such as silt levels and pollutants, viewable via a secure web portal dashboard with live notifications via email and text.
How Does It Work?
SDS Aqua-Swirl® uses hydrodynamic separation technology, which operates under gravity flow, in order to maximise the removal of pollutants, that are typically found attached to silts and debris within surface water runoff, before its dispersal to a suitable outlet.
As well as recovering oils and floating debris, SDS Aqua-Swirl® effectively eliminates more than 80% of total suspended solids.
SDS Aqua-Swirl® can be connected to a pre-existing stormwater management system as both inlet and outlet pipes can be tailored to site specific requirements.
When connected to a SDS SYMBiotIC™ system, SDS Aqua-Swirl® provides real time data on a broad range of key operating factors such as pollutant loads and silt capture level.
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Real World Impact

Berewood Phase II, Hampshire
SDS Aqua-Swirl™ protects residential development from runoff pollution

A69 Bridge End, Hexham
SDS’s largest Vortex Separator addresses road runoff pollution on busy main junction.

DIRFT, Daventry
SDS installs multiple stormwater treatment systems.
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Address
Clearwater House, Castlemills,
Biddisham, Somerset,
BS26 2RE,
United Kingdom