Sewage Treatment Plant and Waste Water Systems

Types of wastewater treatment plant system processes

IMPORTANT - CLICK HERE for a comparison of different sewage treatment system EN 12566-3 Test Results - read this first before you buy to see if your treatment plant choice is the CLEANEST, or did it only just scrape through the test.

Non-Electric Filter Plants

FilterPod non-electric sewage treatment plantFilterPod Sewage Treatment Plant

No electricity required for the FilterPod

It can be installed either below or above ground.

Can be fitted after an existing septic tank.

Three Stage Sewage Plants

Falcon sewage treatment plant



Some of these wastewater systems can also be built as above ground and mobile installations if required

Activated Sludge Plants

Vortex sewage treatment plant


The Vortex plant can be installed either below or above ground.

It gives one of the cleanest effluents of any treatment system.

Can be fitted after an existing septic tank.

Fully adjustable for varying populations.

Very low energy consumption.

Septic Tank Conversion Units

BioKube Venus septic tank conversion


These fit after a septic tank, either existing or new.

Click here for the steps to take for a successful, legal installation, here for an explanation of the wastewater treatment process, and here for wastewater treatment systems for flood plains


FILTERPOD non-electric sewage treatment plants are our own design.. They use non-degradable RDX filter media.

  • 1 to 2 year emptying interval
  • No electricity used for the treatment process
  • Can be solar-powered if required - the only solar-powered sewage treatment plant in the world
  • UK Design
  • 10 year tank warranty


FilterPod non-electric sewage treatment plant


FALCON wastewater systems can work down to very low populations, unlike most plants which struggle when underloaded below 50% of what they were designed to do.
  • 6 to 18 month average emptying intervals
  • Very clean effluent 11BOD:16SS:7NH4 standard
  • OK for holiday homes and underloaded situations, campsites, hotels, visitor centres and domestic houses

DISC plants (rotating biological contactors or RBC's)) are the original package wastewater treatment systems. RBC's are now made by only a few companies as technology has changed.

  • They range from 6 to 350 person systems
  • 3 monthly to annual emptying intervals
  • Relies on extensive internal moving parts
  • Servicing is expensive
  • Best known brand is Klargester
RBC Sewage treatment unit


VORTEX™ sewage treatment plants produce some of the cleanest effluent of them all and have an unbeatable ammonia reduction. They have an EN 12566-3 test effluent standard of an amazing 0.4mg/L ammoniacal nitrogen, which is over 40 times lower than the Environment Agency requirements. The VORTEX™ treatment process reduces pollutants by up to 98.9%.

  • The only ADJUSTABLE sewage treatment plant that can be turned down for lower populations.
  • The VORTEX™ only uses  from 24 watts/hour (£25/year at 12p/Kw) and is the most energy-efficient electric system on the market.Click to find out Why the VORTEX™ is so energy-efficient
  • The VORTEX™ also has an internal sampling point and does not need a separate sampling chamber, reducing your costs by a further £300.
  • The VORTEX™ is the ONLY system suitable for sewage treatment for flood plain sites.
  • With a price of only £1730 plus VAT, delivered for a 6 person plant, they are unbeatable value
  • They range from 6 to 30 persons
  • Annual emptying interval
  • Superb Effluent Standard 9BOD : 16S.S . :0.4NH4
Vortex wastewater treatment system 6 person



BIOKUBE septic tank conversion treatment unit produces a very high standard of effluent, but is, like the Balmoral SBR, a sequencing batch reactor. The domestic range extends up to 30 persons and the units above 10 persons need a pumping station added to the system.

  • Annual emptying
  • Guaranteed sewage effluent quality for the treatment process
  • Ideal for strict discharge standards
Biocube Mars treatment plant image

All makes of sewage treatment plants, including Klargester, are serviced by Sapphire Environmental Ltd

Septic Tank or Sewage Treatment System?

If you are considering using a septic tank instead of a sewage treatment unit, make sure that the ground is suitable for a foul water soakaway drainfield, as over 60% of UK sites fail the mandatory tests that allow them to be installed. Either the Soakaway Trial Site Assessment Hole or Percolation Tests fail these tests, or, the property does not own enough land to enable a soakaway drainfield to be installed. You need a VERY large, treeless garden for a soakaway drainfield!

If your site passes these tests and you have enough land, then, in our opinion, the best septic tank on the market at the moment is the Traditional Design Low Profile Crystal Septic Tank.