Composting toilets
Kompost og Jytte Abildstrøm.jpg
Long live the composting toilet - when the end is good everything is good. The Danish artist Jytte Abildstrom

Renewable Energy has for many years installed composting toilets in Denmark - despite of the nervousness and opposition of the Danish authorities.

Composting toilets remove the "black wastewater", and safe the water for bad nutrient salts and reduce the use of our water resources.

The technology of the future.
The principle to separate waste at the source, is common know in the area of waste. Strangely, our culture mix the waste from humans - feces and urine - with lots of clean drinking water, and wastewater from industries and houses. Then we transport all the mixed wastewater -using a lot of energy - to waste water cleaning plants  - where we one more time use a lot of energy, to try to clean the waste water for certain nutrients and material then we let the water go to our lakes, fjords and oceans. We call the composting toilet for the sanitary technology of the future because we separate urine and feces, so that it is possible to treat both best possible seen in the light of the environment.

What is a composting toilet?
A composting toilet is a toilet, where feces and urine is separated in the toilet chair. Afterwards you compost the feces (together with material as sawdust, grass, leaves which have lot of carbon, the urine is collected and spread on non-eatable crops in the growing season.

  1. When you compost the feces you use no water in the toilet, instead you add a little organic material with a high carbon as cut-up hemp fibers, straw, grass or alike. An average Dane produces 50 kg feces a year, but after composting, it reduces to very small amounts.  A compost is a living organism, and when you work with a compost, you take care of it, to make the right conditions, for the composting process. After composting the feces over years, very little "soil-like" compost is left - you can spread beyond your roses, bushes to give value to the soil. To learn how to compost your own personal waste, when your body has taken the necessary nutrient, is a task, but not a big task, but it demands consciousness and care.
  2. Urine - in Denmark we pee around 500 liters urine a year pr. Person. The urine is rich of nitrogen and other nutrient salts. From the composting chair the urine is collected to containers with the capacity for storage of urine in wintertime (4 seasons)
    As cow urine, the human urine is spread  very thin on growing non-eatable crops.

Vira diseases reproduce itself in a large scale in water environment. Much medicine cannot be "cleaned away" in the "cleaning plants". Why do we use clean drinking water to mix together with our own personal waste???

The global perspective.
In Denmark we can easily dig wastewater pipes in the underground. In our neighbor countries Norway,  Sweden and Finland, they have the solid rocks under the houses and cities, why it has been so difficult to create all the drains and pipes to send everything mixed with water to the sewage plants. In Finland there are more than 400.000 toilets without water, here different types of composting / dry toilets is daily praxis for nearly 1 mill. People.

In India 70% of the population have no toilets (this is a special problem for the women, the girls cannot go to the school, if there is no toilet at the school). In USA MacDonald's build composting toilet in the areas outside the public sewage systems. Also in the states there are a lot of home-build composting toilets. In Japan the universities have research teams lead by  a professor in composting toilets. In Japan very many people live on little space and of course clean drinking water is a huge problem.

Many places in Africa the women spend the day walking hours and hours for water - at the same time the rich consumer consumes more and more water in their toilets.

At water flushing toilets has been a status symbol in the poor part of the world is absurd.

If you ever have stayed at a resort in Asia and seen how the coral reefs are spoiled by the water flushing toilets of the tourists, you might consider if you want to continue to flush water in your toilet, or rather be a good composter !

Underneath you see 2 pictures of a composting toilet building we build on a workshop in Kerala, India. There is an extra hole for washing water (no use of toiletpaper)

Vores komposttoilethus i Sydindien.jpg         fra Indien, vi laver 3 separation urin, fæces og vaskevand.jpg

Fornyet Energi ApS, Øbrovej 9, 4295 Stenlille, Denmark
Phone: 57 80 45 22, E-mail:, 26108225
Copyright Fornyet Energi, All Rights Reserved
Design og CMS by