Balmoral CAP process description
Crude sewage enters the main outer chamber (1) where the initial settlement takes place, with the heaviest solids sinking and the floating matter rising. The liquor from the main section is transferred to the central chamber (2) where it is continuously aerated by the fine bubble diffuser (3) which encourages bacteria to provide the second stage of treatment.
The mid section of this treated effluent is then removed from the chamber through a calming pipe which allows a further brief settlement before discharge (4).
The air compressor (5) runs continuously. It is contained within the neck of the tank (6) and is accessible for maintenance if required.
Easy access is available to both chambers for desludging (7) which is an annual operation.
Effluent distribution drains
Although CAP treated effluent will, in most cases, discharge directly into a watercourse (Subject to consent to discharge from relevant Environment Agency), there will be instances where it is necessary to distribute the effluent into a soakaway system.
A sampling chamber should be provided approximately 2m downstream from the outlet of the CAP to fully comply with the sampling requirements of the Environment Agency and the Scottish Environment Protection Agency.
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