Valero led a project at its refinery in Pembroke, Wales, to upgrade the effluent plant due to high COD loadings (4000 and above mg/l) associated with the processing of crude oil from Russia and the Middle East.
Aquasystems International NV UK Manager Peter Wood had been working with the Valero design, process and purchasing sections of the company for a number of years on several applications within the effluent plant.
Valero initially used 4 x 18.5kW, 2 x 22kW and 2 x 45kW Aqua Turbo® aerators on a trial basis for a 6 month period and during this time the effluent plant outlet levels were well below the consent set points.
Following this extended trial period, Valero purchased 8 x 30kW Aqua Turbo® AER-AS floating aerators.
Aquasystems International supplied and commissioned the aerators on time and within budget.
Valero has been extremely pleased with the design, quality and performance. COD levels have been significantly reduced, as have suspended solids and ammonia.