Teeside Airport

Constructed Wetlands: Groundwater Treatment Plants (GWT)

Created at: 25 Aug 2016

Description

Needs<br>The International Fire Training Centre (IFTC) is based at Teeside Airport in County Durham. They provide specific aviation based training for fire crews from around the world running session 4-5 times per day. Significant amounts of water contaminated with hydrocarbons and fire fighting foam is generated in the form of run-off from the site. The IFTC required that this be treated to Environment Agency specifications prior to discharge into a local watercourse. They also requested that ARM Ltd consider recycling of the water for reuse on the training ground. The required distance of the training ground from infrastructure necessitated the use of a decentralised treatment solution. Flows and loads were variable based on client demand and thus required some form of balancing. Also, the training ground, being hard standing, has a significant rainwater catchment and so in quiet periods a facility was needed for this water, being within consent, to bypass the treatment system and discharge to watercourse. Average flows of 130m3/d were determined with average loads of 808 mg/l COD. Discharge parameters were set at 20 mg/l BOD and 30 mg/l suspended solids.<br><br>Solution<br>A surface water collection system was installed which delivered the effluent into an oil separator. The collected oil could then be reused as an ignition source for fire training purposes. Water then passes into a ‘dirty water’ lagoon where flows and loads are balanced. These flows are then pumped forward through a passive three stage vertical

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