Some types of commercial premises will require drainage interceptors to prevent certain substances (such as grease, oil or detergent) from entering the mains drains or from polluting the local environment by getting into surface water draining off the site. The needs and site must be carefully analysed in order to design the right type of system.
Farley Groundworks have much experience in designing, installing, upgrading and maintaining drainage interceptor systems for a variety of commercial and industrial customers. Here are some examples of such systems but contact us to arrange a free consultation without obligation.
Wash Down Interceptors
Vehicle washing facilities must ensure that trade effluent does not contaminate the local environment and, in particular, any nearby water courses. Any effluent must be treated before it enters surface water drainage such as soakawys or ditches. In some cases it may be necessary to treat the effluent before it enters the mains drainage system. The effluent from vehicle wash down areas is likely to contain detergents, dirt, brake dust, oil and other environmentally damaging residues.
Therefore, ground of the wash down area should be isolated with gullies, channels, kerbs and gradients as appropriate to ensure that the effluent does not pollute the local environment or contaminate surface water drainage and to direct the effluent to an interceptor tank which will remove the contaminants. The type and scale of the interceptor unit depends upon the size and nature of the wash down facility.
Farley Groundworks have installed wash down interceptors at a number of locations for a major car rental chain with operations across the UK.
Oil interceptors, to prevent oil and fuel from entering the drainage system, are mandatory for vehicle yards, servicing areas and car parks. Again, the surface area of the facility needs to be arranged so that all effluent (and water which may be contaminated by effluent) flows into the interceptor tank.
Grease from hotel and restaurant kitchens can cause problems in drainage systems. Grease can congeal in the drainage pipes and junctions causing blockages and back ups. Also, for those premises without mains drain connections, grease is broken down very slowly in septic tanks and this may cause overflow problems.
The size and type of grease interceptor depends upon the scale of the premises kitchen. Grease interceptors and traps remove the grease from the waste water which then flows into the drainage system. These types of interceptor will need to be emptied and cleaned on a regular basis. There are other types of interceptor which actually convert the grease into biodegradeable substances which can be left in the waste water.