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!

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

Traditional versus BIOROCK

In order to support sustainable development, BIOROCK® has developed a sewage treatment plant that does not need electricity or chemicals to work. Making the choice to install a BIOROCK is a sound environmental decision.

Selecting a product that offers a sustainable solution to the problem of waste disposal is a key factor in protecting the local environment. The construction market is becoming increasingly aware of the need for environmentally sustainable solutions for  issues such as sewage treatment and the disposal of effluent from off-mains systems. There is a clear shift towards responsible and sustainable products. BIOROCK® sewage treatment systems are the acknowledged leader in this rapidly changing market.

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BIOROCK products

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 reliable compact 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 to conventional 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 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 leading Sewage Treatment Systems. BIOROCK® prices are no more than that of Biodisc systems.

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 anywhare where no water treatment works is available.

BIOROCK sewage treatment solutions

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.


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® units and Primary 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.

(*) BIOROCK® systems only need a small, easy to exchange pump to reuse the treated effluent if needed.