Dunny BioChar – How to improve Composting Toilet

Biochar for composting toilet label and bottle of samurai wood smoke vinegar

In keeping with our principle of embracing unique and innovative green smart technologies. AHCP’s provides an environmental solution for a circular economy and at the same time generating benefits and opportunities for urban, rural and remote communities.


AHCP is an active member of Industry 5.0 which is based on the principles of INDUSTRIAL UPCYCLING – the methodology of systematic Waste prevention. https://ecoametsolutions.com/industry-5-0/


Composting toilets, together with the secondary composting step, produce a humus-like end product that can be used to enrich soil if local regulations allow this. Some composting toilets have urine diversion systems in the toilet bowl to collect the urine separately and control excess moisture.
Composting toilets do not require a connection to septic tanks or sewer systems unlike flush toilets. Common applications include national parks, remote holiday cottages, ecotourism resorts, off-grid homes, mobile homes and rural areas in developing countries.


AHCP uses it’s unique products to enhance the composting action of these toilets, while addressing the smell and the end product is environmentally friendly, which can be returned to the soil.

Composting toilets normally have two different functions, they divert the wet waste (Urine) into a separate canister and the solid waste goes into the main canister. With our system you need not separate the two processes, as our Activate BioChar takes care of them and Samurai Smoked Wood Vinegar substantially reduces any offensive odder. The end product of AHCP’s process is to create a environmentally friendly solid waste which can be returned to the soil. Supplying a high-quality fertiliser and returning Carbon to the soil, both of which enhance the environment and reduce the waste products removing the need to be treated with chemicals and energy.

Why Use BioChar

Our unique product has two highly sort after properties.

  • The first feature of the charcoal component of the BioChar, which is a very effective agent for binding odour. Our charcoal is specifically manufactured to have a very high number of pores and channels, which create the extremely large surface area. It is this surface area which binds the odour molecules when they come in contact with the charcoal. It also readily absorbs moisture, which inhibits the growth of mould and bacteria.
  • Our second feature of BioChar is the unique process by which we enhance the charcoal with Rehab to the charcoal which becomes the food for the protozoa. The protozoa eat the sugar from the rehab and they break down the human waste they pass the resultant poo out it is clear of any harmful byproducts. The protozoa breaks down the human waste and the result is a product which can be used to enhance gardens, farmland or natural bush without any harmful side effects. Remember it is not good on vegetable or root crops.

How to use BioChar

  • First we recommend that inside the composting toilet you use a paper bag as this will an easy way to remove the combined products of BioChar and human waste from the composting toilet. You may also use a degradable plastic bag outside of the paper bag.
  • Then sprinkle approx. 1/2 cups of BioChar into the paper bag. This will then soak up any fluid and start to break down any solid waste which is deposited in the composting toilet.
  • After the end of your session, sprinkle 1 cup of BioChar over the solid waste. As with a conventional toilet you deposit the toilet paper into the composting toilet. Also before closing the lid you should give it a short spray of Samurai Smoked Wood Vinegar as this will also decease the odor from the Composting Toilet.
  • Once the bag becomes full you can then leave it in a separate container for a couple of days or so, then use it as you would any other fertiliser. The BioChar has broken down the contents into a harmless product which is rich in nutrients and carbon that will enhance the soil/garden. Remember it is not good on vegetable or root crops.

How to Clean

We recommend using our Samurai Wood Vinegar which is a byproduct of our Charcoal making process. As well as being a plant bio-stimulant, helping to to improve water and nutrient absorption through their roots. It is also an excellent for cleaning your composting toilets, as it will effectively disinfect the surfaces it is applied to, while being non toxic to humans when used in the right concentrations.
Mix it with water (1:10 ratio) and use it to clean and disinfect your composting toilet

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See our article on Samurai Wood Vinegar on our website https://www.ahcp.au/2023/10/19/ahcp-samurai-wood-vinegar-uses/ for dilution figures.