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Klargester BC BioDisc Sewage Treatment System (up to 18 person)

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Current Leadtime 20 Working Days


  BioDisc Domestic Certification

  BC BioDisc Product Brochure

  BioDisc BC Installation Guidelines Manual

  BioDisc Owners Manuel Handbook for Domestic Systems

  BioDisc BC Line Drawing


The Klargester BC BioDisc delivers a reliable, effective and ecologically safe solution for anyone with off-mains sewage disposal needs with the lowest running and maintenance costs of any packaged treatment plant in its class.


The drive motor within the BioDisc runs virtually silently and has a much lower power consumption and a significantly greater life expectancy than a typical aeration unit. Low running costs, combined with the quality and durability of the equipment, all add up to a significantly lower lifetime cost. The BioDisc now also comes with a Loss of Rotation alarm (and Pump alarm on the IPS system) as standard.



Features of the Klargester BC BioDisc

In 2005, the Klargester BioDisc went through 40 weeks of rigorous testing to evaluate its treatment efficiency as part of Klargester's dedication to satisfy the new European Standard for small treatment plants.

After delivering remarkably high levels of pollution elimination (95%) under varying loads and conditions, the Klargester BioDisc was awarded its Performance Certificate. The test report also highlighted: 

  • The Klargester BioDisc operates without noise or smell
  • Servicing requirements are reduced with very good access
  • No technical or mechanical faults
  • Low energy usage at 1.3 kw/d - approx 10-14 pence per day
  • Low sludge accumulation and sizeable storage capacity
  • Certified to European Standard EN 12566 - Part 3 - Annexe B - Performance Tests
  • The unique design of the system means that the Klargester BioDisc® is the only packaged sewage treatment system utilitising Rotating Biological Contactor technology for small domestic applications. This process offers inherent cost and performance benefits with a low carbon footprint.


How a Klargester BC BioDisc works


The Klargester BioDisc is ideal for domestic wastewater areas where discharge is to sub-surface irrigation or to a suitable watercourse if permitted. The Rotating Biological Contractor is unique to the BioDisc, and comprises of media discs onto which aerobic micro-organisms, naturally found in sewage, become established. Natural breakdown of sewage can then occur via the 'breakdown process': 


  1. Wastewater and sewage flows into the primary settlement zone where solids are settled out and retained. This accumulated sludge should be drawn out periodically.
  2. Partially-clarified liquor containing fine suspended solids flows upwards into the first stage Biozone for breaking down by micro-organisms on the RBC.
  3. Suspended solids return to the primary settlement zone and the liquor is transferred to the second stage Biozone for further treatment.
  4. Any solids remaining are settled out in the final settlement tank. The resulting very high quality effluent can be discharged to a watercourse.


Klargester BC BioDisc - Sizing Your System


Browse the alternative sizes of Klargester BioDisc sewage treatment systems available via the links below:

BA BioDisc - suitable for up to 6 population (up to 4 bedrooms)

BA-X BioDisc - suitable for up to 9 population (up to 7 bedrooms)

BB BioDisc - suitable for up to 12 population (up to 10 bedrooms)

BC BioDisc - suitable for up to 18 population (up to 16 bedrooms)

For commercial-sized systems please contact us for more information, on 01388 537050


Invert Depth options on the BC BioDisc:

  • Standard 600mm
  • 1100mm

Delivery Information


Free delivery to UK mainland postcodes. Offloading is the responsibility of the customer.


How much does a sewage treatment system cost to run?

The Klargester BioDisc has the lowest running and maintenance costs of any packaged treatment plant in its class. An important design feature is the drive motor which runs virtually silently, has low power consumption and a significantly greater design life expectancy than a typical compressor. Low running costs, combined with the quality and durability of the equipment, all add up to a significantly lower lifetime cost.


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