Sewage treatment system installed
barely visible above ground
Biorock sewage treatment plant
With pump
Biorock sewage treatment plant
Without pump, no electricity needed

BIOROCK, the best residential wastewater treatment system without electricity, zero energy. 25 years warranty!

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Multiple advantages

Revolutionary technology

  • No electricity required
  • No moving parts
  • 24 hour start-up
  • Long absence periods acceptable

Unique comfort

  • Completely silent
  • Lowest operational costs
  • Superb effluent quality
  • Septic tank conversion unit (retrofit)

Most sustainable

  • Long lifespan BIOROCK®® Media
  • Low carbon footprint
  • Minimum annual maintenance
  • Long de-sludge interval


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Our residential Sewage Treatment Plants

BIOROCK® offers a complete range of compact and non-electric residential waste water treatment plants, denominated into 6, 8, 10, 15 & 30 person systems. If installed in parallel the treatment units can also cater for 60, 90, 120 people and so on. BIOROCK non-electrical sewage treatment plants offers an ideal solution for residential, domestic sewage water treatment in the United Kingdom

The BIOROCK® residential wastewater treatment system consists of a separate settlement tank, which can be an existing traditional brick or concrete septic tank, followed by the BIOROCK ECOROCK sewage treatment plant.

BIOROCK® provides a revolutionary, efficient and reliablecompact wastewater treatment solution. Very compact, our systems are free from any blower or air diffusors. They don’t need any electricity for the treatment process, leading to minimal maintenance and repair costs, the lowest operational costs and the longest desludge intervals.  These unique advantages lead to significant costs savings for the user compared toconventional wastewater treatment plants, as the reliability of the system is maximized with no possible breakdowns thus no need for expensive spare parts.

The costs-saving domestic Sewage Treatment Unit

The BIOROCK® non-electric sewage treatment plant will save you between £300-£700 and over 0.5 tonnes CO2 emissions every year for 5 person plants when compared to the current UK market Sewage Treatment Systems. BIOROCK prices are no more than that of Biodisc systems.

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Testimonials and case studies from all around the UK

With 25 years in the wastewater industry, we pride ourselves on our ability to supply our customers with the most economic, sustainable and effective residential sewage treatment solutions.

Click on the pictures for an overview of some BIOROCK® installations throughout UK.


Significant savings through very low maintenance and running costs

No energy costs for the treatment process:
Cost savings per year £60 to £100
Long emptying intervals of the primary tank:
3-4 years only. Cost savings per year: £200(*)
Minimal maintenance and repair costs. Not prone to failure. No breakdowns
Thus no need for expensive spare parts

(*) Compared to conventional wastewater treatment plants


When buying a sewage treatment plant in the United Kingdom: BIOROCK®! The low-maintenance. non-electric waste water treatment plant.

Installation for all type of ground conditions and applications

  • Reinforced and durable. the BIOROCK® tanks are reinforced as standard enabling them to be structurally sound in all ground conditions such as high ground-water sites.
  • The BIOROCK® has the ability to handle intermittent (seasonal) wastewater loadings, even during long absence periods. Holiday Homes, Campsites, Caravan Parks, etc.
  • The BIOROCK® can also handle low utilization levels without compromising the treated effluent quality. 
  • BIOROCK® Non-Electric septic Tank Conversion Unit: Our plant uses no electricity for the treatment process and can be added to an existing septic tank. 

The best final effluent testing results in the UK

BIOROCK® residential sewage treatment plants clean the sewage to an astonishing level of purity. They achieved a final effluent with a 99% reduction in pollutants during the EN 12566-3 test period when following a 2 stage settlement tank. This is a lot cleaner than the leading UK electric sewage treatment plant that sells for the same price. BIOROCK units can be used anywhere where no water treatment works is available. 

More information: Read Traditional VS BIOROCK

Unique advantages

  • Completely odourless and silent
  • Excellent treatment performance
  • Free Initial Consultation
  • Installation supervised by trained BIOROCK® Certified professionals 

About the BIOROCK Media

BIOROCK® uses a material with huge surface area which allows colonization of the necessary bacteria, a process which is essential for the effective treatment of domestic wastewater.

The BIOROCK® media is highly resistant to degradation and remains extremely stable over the long term - our 25 years' experience in the industry being proof of this.

  • Very stable inorganic material - does not break down over time, unlike "organic" media.
  • Requires little maintenance - scraping and scarification is not necessary, unlike for organic media.
  • The structure and composition ensures unsurpassed and unique surface treatment with exceptional purification results.
  • Ecological material, locally produced and 100% recyclable.

BIOROCK® offers a much more efficient and ecological wastewater treatment technique compared to traditional techniques that are very high in maintenance and energy consumption. 





Media: 10 years
Tanks: 25 years

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