Human waste is not only one of the largest sources of environmental pollution (and waste of clean drinking water) It is also an enormous potential resource in the form of biogas & nutrients (fertilizer). We can advise on the best solution to handle sewerage and black water in a way that turns it into a resource and returns it to the soil, where it belongs.

More than 80% of sewage in developing countries is discharged untreated, polluting rivers, lakes and coastal areas. -

A property or house has to deal with their “Sh#@t” to be truly off the grid & sustainable. There are effectively 3 technologies we endorse, biodigestors, compost toilets and vermicompost toilets.


Everyone in Cape Town is now painfully aware of how wasteful it is to wash your poo away with precious drinking water. What If you could return that water to the soil and provide your kitchen with all the cooking gas you need?

A Biodigestor receives your existing sewer outlet and creates gas for you to cook with in the kitchen.

  •  It works with existing flush toilets
  • The gas does not smell at all (unless the flame is put out)
  • It can be installed above or underground
  • Provides 45 minutes of cooking gas p/day (household of 4)
  •  Will reduce your sewage by 80%. Wetlands can be used to further recycle all waste

TOP RIGHT - Biogas being used in the kitchen. BELOW - The tank is generally installed below the round to allow sewerage to flow in.

Compost Toilets

A compost toilet is a dry system using sawdust instead of water - this makes it the most water-wise solution one can have. They can be designed built in a very sophisticated manner that allows them to be incorporated into a regular bathroom and toilet with ZERO odour. The only difference is that you have to empty a cup of sawdust down the loo instead of flushing.

  • A great option for a new builds but difficult to retrofit to existing bathrooms.
  • Every 6 months the composted waste is taken out and can be used in the garden and with fruit trees.

Vermicompost Toilets

Another option that can be used with existing flushing toilets. The effluent is redirected through a tank the contains worms who in turn process all the waste for you. The remaining liquid that comes out is then channeled into a green filter. Essentially a 2m x 2m bed of reeds and nutrient hungry plants. The green filter can be designed to be a beautiful feature of a garden or landscape.