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Interceptors and Separators

The type of interceptor or separator required will depend on your site specific criteria, such as where the interceptor or separator is positioned, and the type of liquid being separated.

We can provide advice on several different types of tanks including pumping chambers or stations, silt traps, oil treatment interceptors, dosing systems, fuel retention separators, separators for the treatment or collection of oil and chemicals (such as car wash chemicals), septic tanks and wash bay interceptors.

The different types of interceptors and separators available on the market include;

Pumping Chambers

Pumping chambers are used where water needs to be transported from one place to another (usually a drain), but the natural levels or falls of the land do not allow just gravity to do the job.

Pumping Stations

Where water is contaminated from heavier and industrial applications a pumping station is usually required. Examples might include the pumping of dirty water to a mains foul drain or rain water to a surface drain.

Pumping stations are typically constructed from GRP and there are various sizes and capacities available depending on your requirements and needs. Where contaminated water contains oils, a Dosing system is often required.

Mini Silt traps for wash bays

Where only a small or a lighter silt trap is needed, or there is likely to be low silt levels on site, a mini sump is ideal and cost effective. Due to the lighter levels of silt they are suitable for cleaning most small to medium vehicle types, such as cars and vans.

Light to medium duty silt traps

The silt traps, placed prior to the interceptor, provide a 'sump' where the wash water collects, usually in the centre, and then falls into the silt trap for collection and further treatment.

Heavy duty silt traps

A heavy duty silt trap is placed prior to the interceptor which means that large debris can often be collected and can be easily accessed for emptying. It also prevents extreme amounts of silt from entering the interceptor.

A silt trap is generally constructed from GRP and can be easily connected to an interceptor.

Heavy duty silt traps are ideal for places where there is a high risk of soil, dirt or earth entering the drains via the wash area. The silt traps, placed prior to the interceptor, provide a 'sump' where the wash water collects, for collection and further treatment.

The silt trap can then be coupled with other items such as a wash bay interceptor. Typically a heavy duty silt trap is used in environments such as open-casts or landfills, quarries or for cleaning quarry vehicles, or other environments where earth and dirt frequently moves around.

Large debris is collected by the silt trap and can generally be emptied via a hinged galvanised grating. The silt traps are available in many different sizes depending on your needs and requirements.

General interceptors for wash bays

Wash bay interceptors are vital for any vehicle wash or water reclaim installation. A 2 or 3 stage interceptor tank is designed especially for vehicle wash installations or for when used in conjunction with water recycling. A wash bay interceptor is designed to treat the outflow of wash water from the wash bay before entering the drain.

Combination wash bays and silt traps

These are combination silt traps and interceptors designed to be positioned in the centre of a wash area so water can fall to the grating and into the interceptor. The combination system saves installation costs when it's possible to use instead of an individual silt trap and interceptor, for lighter use or infrequent washing. The combination tank then connects to a mains foul drain. It provides 2 stages of settlement with a galvanised silt trap grating and sump.

Heavy duty steam cleaning and MOT washing

Where oil and water has emulsified due to the presence of detergents chemicals and hot water, a interceptor with a dosing system fitted to split these emulsions and a filter to remove the oils may be required. Normal, standard interceptors will not remove oils unless they are free floating. There are various sized chambers with various sized outlets and inlets which can be installed depending on your needs and requirements for your site.

Dosing Systems

A dosing system is normally required on a site where emulsified oils need to be separated or there is a need for water conditioning. Free standing units are ideal for sites where mounting is unpractical or unnecessary. A dosing system contains the dosing system unit, dosing products and control panel. Dosing systems are available in many different specifications depending on your specific needs. They are more often used in conjunction with interceptors.

Surface water drainage

Where the potential for water pollution is high, a separator is required to prevent pollutants entering our surface water drains. Many places affected by the higher risk levels of water pollution via surface water drains include fuel depots and delivery stations among many other environments. Separators are installed on car parks or hard standings where they are positioned to treat contaminated water before it enters the watercourse. Different options are available depending on your requirements, size of the premises and it's varied use and needs.

Separators for a fuel island

Fuel separators or petrol interceptors are normally required where the interceptor is to be placed on a garage forecourt or other similar environment. This type of interceptor is used to prevent fuel seeping into the watercourse and are especially useful where larger spillages of oil or fuel are likely, especially where a fuel delivery tanker would be making a delivery.

Oil separators

Oil separators are generally used where free floating oils present a risk to the out flow of water into the a water course or drain drains. They are are designed for use where the risk or contamination is high such as breakers yards, maintenance facilities or anywhere where oil is stored or likely to be regularly spilled. Oil separators are not suitable for vehicle wash bay applications.

Septic tanks

Where the separation of solid and liquid waste is necessary, a septic tank is generally required. In general, due to its two-chamber design, a combination of water and solids flows into the tank, solids remain in the first chamber due to their weight, and liquid moves freely into the second. Waste water septic tanks can be found in many areas where there is no connection to a mains sewerage pipe and are more common place in rural areas.

This is simply a general overview of the advice we provide in respect of interceptors and separators. Our consultancy team will be able to advise on which interceptor or separator best suits your needs and requirements.

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