Project Details

Project Delivery

Discussion

Situation

An important football club in Spain was expanding its premises with the construction of new training grounds. In the first phase, the new academy will hold only the sessions of their main professional team, as well as some associated staff.

Since the area selected for the facility is located outside of an urban area, a decentralized treatment unit was required to ensure the wastewaters could be safely discharged into a nearby stream.

Problem

The nearby city has plans of expanding its local collection network. However, that can take a few years, so the team could not risk inaugurating their new grounds without ensuring a proper destination to its sewage.

In this initial phase, the biggest challenge were the fluctuating flows, since the daily amount of wastewater produced highly depends on the training schedule of the professional team. That means the treatment solution needed to be capable of handling well varying flows and loads.

As the customer wanted to discharge the treated wastewater directly into the environment, this required a particularly reliable treatment solution.

Solution

PPU supplied the customer with a ClearFox® QuickOne+ unit, which is a single-chamber SBR system, designed according to DWA’s requisitions. It is particularly suitable for the treatment of grey and black waters, and it meets all requirements for direct discharge in accordance with discharge class N.

The SBR was assembled in a prefabricated concrete tank, suitable for below ground installation, which ensured the required civil works on site were minimal. Thanks to its simple installation, the small sewage treatment plant could be put into operation quickly, meaning that the wastewater disposal of the academy could be ensured from the day of its inauguration.

The SBR system operates in cycles. The core of the treatment is the aeration phase, in which the microorganisms in the wastewater are supplied with air to ensure the degradation of the contaminants in the water. This step is followed by a resting phase, in which the sludge settles to the bottom of the plant. Due to the aerobic sludge stabilisation, very little secondary sludge is produced. Finally, there is an extraction phase, where clear water is discharged safely back to the environment.