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.