Biolan Separating Dry Toilet

A tidy toilet to be installed on the floor!

  • the daily use of the toilet is tidy and pleasant  
  • the ventilation pipe leading from the toilet tank to the roof ensures the room space remains odourless  
  • the smooth plastic surfaces of the unit are easy to keep clean  
  • the seat ring is a thermal seat that feels comfortable even if the room space is chilly 
  • separates urine from solid waste in the seat part 
  • easy-to-operate batcher of bedding 
  • two separate inner receptacles inside the waste tank


Dark gray
Product number: 70570360

Product number: 70574200

Using the Biolan Separating Dry Toilet

The Separating Dry Toilet must be used and maintained in accordance with the instructions. This makes use and maintenance of the toilet more pleasant. Separation of the liquid and the solid waste requires that the Separating Dry Toilet must always be used in the seated position. When operating the unit for the first few times, the users should verify that their own seating distance and habits are suitable for it. Guests should also be instructed on how to use the toilet.

The Separating Dry Toilet is intended for composting toilet waste also including toilet paper. Do not put into the toilet anything that could hamper post-treatment of the toilet waste, such as:

  • debris, sanitary towels 
  • chemicals, lime 
  • detergents, washing water 
  • ash, cigarette butts


Before use

Put a layer a couple of centimetres thick of the Biolan Komposti and Huussi Dry Bedding on the bottom of the foremost inner receptacle. Fill the bedding container with bedding.

Using bedding

The bedding batcher is located in the bedding container at the rear of the toilet unit. It is operated by depressing the batcher"s knob. The dry bedding does not need to be added every time the toilet is used; adding it after defecation is sufficient.

Applying suitable dry bedding is essential for proper operation of the toilet. We recommend using as bedding Biolan Komposti and Huussi Dry Bedding. The Komposti and Huussi Dry Bedding efficiently absorbs odours and keeps the toilet compost airy.

Year-round use of the toilet

A toilet, installed in a warm space, can be used around the year. This requires that thermal insulation of the ventilation and the liquid removal systems in cold spaces is taken into account.

A toilet, installed in a cold space, can freeze during winter. The toilet unit is manufactured of frost-proof polyethylene, so freezing does not damage it. A toilet, located in a cold space, can be used occasionally during winter. If the liquid is collected in a canister, the canister must be emptied in the autumn in order to avoid damage caused by freezing of the liquid. If the bedding in the container is moist, it may freeze during winter. Thus the batcher of the bedding will not work and the bedding needs to be added manually.

aintenance of the Separating Dry Toilet

The Separating Dry Toilet must be used and maintained in accordance with the instructions. This makes use and maintenance of the toilet more pleasant.

Emptying the inner receptacle

There are two separate inner receptacles inside the tank of the Separating Dry Toilet. Only one of them is used at a time. When one of the receptacles fills up, it is moved to the rear part of the unit and the other receptacle is put into use. As required, the surface of the waste can be levelled using, for example, a stick. The covers for the inner receptacles are intended for use while transporting the receptacles for emptying. Leave the cover ajar when storing. Once both the toilet receptacles have filled up, empty the one that filled up first into the compost.

Disconnect the toilet"s ventilation pipe from the top of the unit for emptying. Turn the top part of the toilet unit to the side or lift it away to enable the inner receptacles to be lifted out. There is no need to wash the inner receptacles when emptying them.

While putting the inner receptacles back, make sure that the receptacle that will be used is in the correct location against the separating bowl. Put a couple of centimetres thick layer of the Biolan Komposti and Huussi Dry Bedding on the bottom of the receptacle.

Emptying the liquid tank

Empty the liquid tank when necessary. The emptying intervals are determined by the size of the liquid tank and by how often the toilet is being used. One person produces 1-1,5 litres of liquid daily.

The liquid, rich in nutrients, in particular nitrogen, can be utilized as fertilizer in the yard and garden. Although urine is sterile, it is recommended to keep it in storage for about a year before using it in the garden. A small amount of undiluted liquid can be used as a source of nitrogen for the garden compost and the compost of separated toilet waste. Optionally the liquid can be taken to the wastewater treatment plant.

Cleaning the Separating Dry Toilet

The Separating Dry Toilet must be washed and cleaned when needed. Any common domestic cleaning agents can be used for cleaning. The toilet can be dismantled to enable proper cleaning. Wash the liquid bowl in the seat ring, the liquid funnel and the removal pipe with warm water and mild detergent or crystallized sodium at least once a year to remove any precipitate the urine has formed.

The operation of the Toilet is based on separation of the solid waste and liquid in the seat part. The toilet requires neither water nor electricity supply.

Location of the Biolan Separating Dry Toilet

While building and selecting the location for the Biolan Separating Dry Toilet, it is essential to provide sufficient space for use and maintenance of the toilet. Also, the ventilation pipe must be conducted without any bends through the roof above the ridge.

The liquid shall be collected in a closed tank to be utilized later, or treated together with other wastewater from the property, or forwarded to the wastewater treatment plant. When dimensioning and selecting the location for the liquid tank, you need to take into account that daily amount of liquid from the separating toilet is 1-1,5 litres per user.

Post-treatment of the solid toilet waste and selection of the location must also be carefully planned in order to enable easy servicing of the unit.

Placing the Separating Dry Toilet in the toilet space

Place the Separating Dry Toilet at a level position on the floor surface. When selecting the location for the unit, the space required for ventilation, the liquid removal system and maintenance of the unit needs to be taken into account.

Installing the ventilation pipe

The ventilation pipe is led from the toilet unit straight up above the roof ridge. Any bends in the ventilation pipe impede natural ventilation, causing odour problems. The ventilation pipe is joined up in accordance with the operating instructions and the lead-through on the roof is sealed using sealant suitable for the roofing material. As required, the ventilation pipe can be extended using a sewage pipe 75 mm in diameter.

In complicated installations, or if the toilet is being built in connection with living quarters, it is recommended that the ventilation be ensured using the separate Biolan Exhaust Ventilator (5754) or the Biolan Wind Ventilator (5725). The Exhaust Ventilator is available as an option and, as required, it can be retrofitted.

Conducting the liquid away after separation

After separation the liquid is conducted from the toilet unit into either the liquid tank or the wastewater disposal system. During installation, provide the required gradient to enable unobstructed flow of the liquid all the way down. Depending on the installation location, the lead-through can be accomplished as a sewer, a lead-through pipe through the wall or the floor. The diameter of the toilet unit liquid hose is 32 mm. Sewer pipe parts or a hose 32 mm in diameter are suitable for conducting the liquid away. We recommend using a coupling sleeve at the pipe or hose joint.

The toilet unit has no drain trap. If the liquid is conducted into a tank, the hose must extend all the way to the bottom, in which case the surface of the liquid in the tank makes a drain trap in the hose. Thus the air cannot flow from the liquid tank back to the toilet unit. If the liquid is conducted to the sewer system, then ventilation of the sewer system and the toilet must be explicitly taken into account during planning.


Dimension drawings

  • Width: 59,4 cm
  • Sitting height: 53 cm
  • Height: 85 cm
  • Height to the batcher's knob: 98,5 cm
  • Weight: about 16 kg
  • Volume of the bedding container: 30 litres
  • Size of the inner receptacle: 28 litres
  • Diameter of the ventilation pipe: 75 mm
  • Diameter of the liquid removal pipe: 32 mm