Sewage Treatment Plants

Domestic sewage treatment plant systems can be used when it is not possible to install a septic tank.

This can be due to high water tables, high levels of bedrock or clay soils giving poor soakaway test results.  They solve many drainage disposal problems when mains drains are not available.

There is no such thing as the PERFECT sewage treatment plant - although the manufacturers will all claim that theirs is the BEST. Each type has plus and minus points, depending on the individual site and some types are not suitable for low occupation or intermittent use, although, again, the manufacturer will not disclose this.

Crystal Tanks can survey your individual site and advise which system, either a septic tank or a particular wastewater treatment unit, would be most suitable.

Please click below for details of our domestic and commercial sewage treatment units and wastewater advice:-

PureFlo	ClearFlo		Crystal CUBE	Above Ground

Other Information: 

• Sewage Treatment Options
• Percolation Tests
• Soakaway advice, design, and installation
• Can roofwater go into a sewage system?
• Surveys
• Septic Tank - Sewage Treatment Plant - DIFFERENCES
• New sewage regulations, EPP2 legislation and EN 12566-3 2005
• Which is the current British Standard for wastewater treatment systems?
• Extended aeration explained
• Our Treatment Services
• Optional extras and spares

The sewage treatment process falls into two main categories; electrically operated and non-electric systems.

The electric systems comprise of a small electrically driven packaged unit, usually all contained in one tank or housing. The sewage is first settled to remove the gross solids and then biologically treated in a biozone, comprising of rotating discs, or air injection, with a final settlement stage to remove the fine solids. The effluent can be discharged about 95% clean, to a land drainage system or watercourse, (subject to Local Authority and Environment Agency Consents). Maintenance and emptying of the system will be required at regular intervals. There are numerous variants of packaged plants available on the market; the PureFlo, Clearflo and the Crystal CUBE are three of them.

The non-electric treatment process uses natural air currents to power the process; the BIOROCK is an example of this.