Testing

All air main pipe assemblies are pressure tested during the installation phase,
mobile compressors are used in conjunction with blanking plates and isolators to
pressurise specific areas and check that pressure drops are within predetermined
limits. A test rig using calibrated gauges ensures consistent and accurate results.

As soon as the blowers are ready and air is made available a dry leak test will be
carried out on each drop leg and diffuser joint using a soap based solution. Once
this has been completed sufficient clean water or good quality final effluent will
be required to a depth of 100mm above the diffuser membranes. A wet inspection
can then be carried out.

Once basic leak testing is complete, a diffuser pattern test will be performed to
ensure that the diffusers have uniform air distribution and there are no dead zones
within the aeration lanes.

Oxygen Transfer Efficiency (OTE) tests can then be undertaken if required.

Scaled tests can be carried out at the Aquaconsult technical facility in Vienna as
an economic alternate to commissioning full scale tests on large tanks.