Onsite surface water processing

Onsite surface water processing

Across the Gatwick estate there are over 50 interceptors in the surface water drainage system. These below-ground tanks collect grit, sediment and oil from car parks and industrial areas preventing these contaminants from reaching our local rivers. Regular maintenance of these interceptors would normally involve tankers removing the entire tank contents with disposal at a suitable waste treatment facility (in our case a 90-mile round trip).

In partnership with local business Sweeptech Environmental Services Ltd, we now utilise an innovative KSA tanker which processes the contaminated water on board, returning only the clean water to the drain. The contaminants are filtered out using chemical flocculants leaving a cake of sludge which is returned to Sweeptech’s local facility for treatment and, where possible, is recycled into building materials. It is estimated that this new process saves in the region of 5 tonnes CO2 per annum.