Municipal WWTP, Spain: A Case Study

The oxidation ditch configuration based wastewater treatment plant in Spain required a quick upgrade in order to comply with new inflow and quality requirements.

Requirements

The existing plant was operating with two parallel Oxidation Ditch modules with a flow rate of 600 m³/d each, and exhibited very poor nitrification capacity. The plant was to be expanded (at the final stage) to treat a total of 2,400 m³/d t and to achieve the EU Total Nitrogen limit of 15 mg/l.