High purification capacity
The ROTO purifying plants operates safely and reliably, without unpleasant smell and noise. Moreover, they are not sensitive to temperature fluctuations in the environment. Waste water from toilets, bathrooms, kitchens and similar households sources of pollution are purified to such extent that water can be safley released to surface waters, or can be used for watering of lawns and trees with additional treatment. Purifying plants are constructed in accordance with standard SIST EN 12566-3 which is valid in EU (BOD 5

Low operation costs
High level of economic and energy efficiency.

Reliability and trust
Over 20.000 purifying plants, oil separators, septic tanks and rain water tanks are installed in more than 50 countries around the world. ROTO is a pioneer in the field of waste water treatment production in Europe. Company also recevied ZRMK Building and Civil Engineering Institute’s award, which is selected by experts in civil engineering, which proves product’s excellence.

Container sized
Completed purifying plant can be delevered in containers. In 40 ft container we can fit 50.000 L tank.

EU products
Purifying plants are manufactured and cetificated in EU countries

Size of the purifying plant

Determining the size of the purifying plant

  • The size of the purifying plant is determined by population units (PU) or equivalent users, while at the same time defining the biochemical capacity of the treatment plant.
  • The PU unit signifies the specific consumption of water ranging from 0.15 to 0.20 m3/person/day and the biochemical load of 0.06 kg BNO5/person/day.
  • Working volume which is necessary to purify the waste water is from 500 to 800 liters per person.

Plug and play
Ready to use product, easy and quick installation in few days.
Suitable for remote installation without infrastructure.

Underground installation
All our waste water plants are designed for underground
installation. This way they do not use space above ground level.

Modular building
Possibility to add capacity and to move plant to another location.

Tank is made FROM polyethylene
Polyethylene can be 100 % recycled, has good mechanical
resistance. Tanks are produced in one part and are 100% watertight.

Excellent service and technical support
Quick supply, maintenance, start-up and servicing performed by expert staff. Servicing by the ROTO company comprises the checking of mechanical parts in a plant, general cleaning services and operating situation control, as well as the testing of all functions performed by individual plant parts. The user is instructed about maintenance and the correct use of treatment plant. We can also organise or supervise the installation of plant.

ROTO purifying plant is the right decision!


  • 3-person = 1 PU


  • 2-person = 1 PU


  • with kitchen – 2-person = 1 PU
  • without kitchen – 3-person = 1 PU
  • garden terrace – 10-person = 1 PU (without kitchen)

Information is important in the design, structure, calculation of PU AND OF COURSE THE PURCHASE.