BIOROCK®, the best compact sewage treatment without electricity, zero energy. 25 years warranty!

The original!

Revolutionary technology

  • Septic tank replacement / upgrade
  • No electricity sewage treatment process
  • Very light maintenance
  • 24 Hour start-up period
  • Long absence periods acceptable

Unique advantages

  • Completely silent
  • Low operational costs
  • Superb effluent quality
  • Septic tank conversion unit (retrofit)
  • Non-electrical
  • Optimized for England


  • Low carbon footprint
  • Minimum annual maintenance
  • Long desludge interval


When buying a sewage treatment plant in the United Kingdom: BIOROCK®! The low-maintenance, non-electrical(*) waste water treatment plant.

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

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® products

Sewage Treatment Plant

BIOROCK®® offers a complete range of compact non-electrical waste water treatment plants, denominated into 5, 10 & 15 person systems. If installed in parallel the treatment units can also cater for 30, 45, 60 people and so on. BIOROCK® non-electrical sewage treatment plants offers an ideal solution for domestic sewage waste water treatment in the United Kingdom

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

The costs-saving domestic treatment unit

The BIOROCK® non-electrical 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® 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