Sewage treatment plan for Aragon: Zone 11

The project includes management and supervision of 13 WWTPs and their external connections for treatment of waste water from 14 towns and villages, including health and safety coordination. In all cases, treatment is by means of activated sludge in prolonged aeration with design population equivalents varying between 1,000 and 6,250. The total population equivalent for the 13 WWTPs is 33,153.