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BIOROCK®, the best compact on-site wastewater treatment without electricity, zero energy. 15 years warranty!

Biorock, the original!

Revolutionary technology

  • Septic tank replacement / upgrade
  • No electricity wastewater 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 New Zealand


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


When buying a wastewater treatment plant in New Zealand: BIOROCK! The low-maintenance, non-electric(*) onsite waste water treatment system.

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 high-level discharge requires the use of a small 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 on-site sewerage facilities

Our On-site Wastewater Treatment Systems

BIOROCK® offers a complete range of compact non-electric Residential Aerobic Treatment Units, denominated into 6, 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-electric residential onsite wastewater treatment systems offer an ideal solution for domestic waste water treatment in New Zealand.

The BIOROCK systems are very compact and 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.

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 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.

The best final effluent testing results in New Zealand

BIOROCK wastewater treatment systems clean the sewage to an astonishing level of purity. BIOROCK is one of Europe’s most popular home treatment plants and is fast becoming the system of choice in New Zealand. Our residential wastewater treatment systems can be used anywhere where no water treatment works is available.

BIOROCK also stands out as one of the most successful systems at the independent test facility in Rotorua. It is a proven system that meets NZ performance requirements: BIOROCK is certified to meet the secondary effluent quality requirements of AS/NZS 1547:2012.