In our Kild Wiki you'll find many terms and explanations on the subject of toilet, composting and much more. In the future, we would like to provide you with an encyclopaedia that expands step by step. We would like to reach that goal together with you. Therefore, you are welcome to send us topics that can't be found in the Kild Wiki yet. After reviewing your suggestion, we will expand the Kild wiki accordingly.

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In aerobic composting processes, the biological decomposition processes (composting, rotting, and decomposition) are carried out by organisms that breathe oxygen.

Algae lime or algae flour

Algae flour is preferably used in organic horticulture and obtained from the deposits of red algae. It is used in composting as enrichment. You can also use seaweed lime as an emergency measure in case of acidification of the solids container of your DCT.


In anaerobic composting processes, the biological decomposition processes (decay or fermentation) occur by means of organisms that avoid oxygen.

Bark chips

Bark chips can be used as litter for the solids container, in contrast to bark mulch, which is used as a cover for weed control for beds. When buying bark chips you should keep in mind that no further additives are included.

Biological residues

Organic residues are all organic left overs from the garden (grass clippings, fallen fruits, leaves ...) and household (coffee grounds, egg shells, fruit and vegetable remains ...) which are biodegradable, for example via composting.

birch plywood

plywood plates are manufactured to achieve extreme dimensional stability and solidity. At least three layers of wood are used in production, whose grain is pressed and glued at a 90-degree angle. In contrast to untreated wood panels, plywood hardly changes its shape - it is therefore an optimal wood material, for example in the production of furniture.

Black water

According to German law (ISO 6107-7: 1997), domestic sewage without greywater is considered to be black water with faecal solids.


The term "Bokashi" comes from the Japanese and means "fermented organic mixture". Bokashi is a high-quality fertilizer, you can either buy it ready made or you can produce Bokashi yourself. For this purpose, complete kits are available in stores. In contrast to normal composting, in which oxygen plays a major role, in the Bokashi process oxygen is excluded, instead fermentation occurs, lactic acid fermentation. In this case, the addition of effective microorganisms is required; they can sanitize hygienic hazardous material (e.g. faeces).

Brown water

Brown water is defined as waste water containing faeces, urine, grey water and toilet paper. This water is contaminated by viruses, bacteria and parasites in such a way that complete reprocessing is very difficult.

Cassette toilet

Cassette toilet is another term for chemical toilet; there are versions with and without flushing.

Chemical toilet

In a chemical toilet, excreta - faeces and urine - are collected together in a tank. Chemical substances are used for disinfection and decay reduction as well as against odours. Big solid tank toilets, e.g. "Dixi" toilets are chemical toilets too. The additions to the chemical toilets pose a great burden on the environment and our health. The emptying of chemical toilets should never be carried out in nature under any circumstances, but only at special disposal stations.

Coconut fibres

Coconut fibres, also known as coir, are extracted from the casing of the immature coconut (Mesokarp). The fibres are made into ropes, mats, carpets and much more. Coconut fibres can be used as litter for the solids tank, but are not suitable for composting because they are difficult to decompose via bacteria and fungi.

Compost worm

The compost worm is one of the most widespread earthworm species in Europe. It is also called dung worm. The animals reach a size of 60 to 120 millimeters and are hermaphrodites; two worms are still needed for reproduction. Because they consume 1.5 times their bodyweight per day, they are excellent recyclers of organic matter.

Composting toilet

Compost toilets are not connected to the public sewerage system and work without water flushing. The excretions are usually collected in a single container and then composted.

Cremation toilets

In cremation toilets faeces and urine are not separated. The precipitates are burned at temperatures up to 500 degrees - leaving only a pile of ashes. The combustion takes place using gas or electricity.


Shortcut for "dry composting toilet"

DN – diameter nominal

This is the name of the nominal value of pipes. DN means diameter nominal and indicates the diameter of outer tubes in millimeters.

Dump toilet

Anyone who has ever used a dump toilet will remember the unpleasant odour. A separation toilet has nothing in common with the outhouse, except that both do not require water and are filled with litter. Since urine and faeces meet in the dump toilet, a rotting process begins, which brings with it the distinctive pungent odour. Due to the wetness of the faeces, leftovers cannot be composted - in contrast to the DCT.

EU standard DIN EN 13432

This DIN standard covers the regulations for biodegradable plastics. (L: blog article EU standard)


Faeces are human excretions, which are also called excrements or excreta. They are composed of solid (faeces or faeces) and liquid (urine) excreta.

Finished compost

Finished compost, also called compost earth, is the name given to plant-tolerant soil improvement material after completion of the construction phase in the compost heap. Especially with more sensitive plants, blending with garden soil or sand is recommended.

Grey water

Grey water refers to the collection of water that is created during cleaning processes, e.g. when bathing or showering, from the sink, the dishwasher or the washing machine. Grey water is only slightly contaminated and can be recycled relatively easily.

Lime or carbonate of lime

Lime, referred to in technical language as calcium carbonate, is composed of the elements oxygen, carbon and calcium. In separation toilets, lime is used in the case of acidification of the solids.


Miscanthus is a native plant of Asia and Africa, which is now grown in Germany too. It belongs to the grass family, grows very fast and up to 3 meters high. The plant is very robust and does not require fertilizers or pesticides. Many things can be produced from Miscanthus, such as paper and packaging, bedding for livestock, insulation materials etc.


Paruresis is a phobia that denotes the fear of urinating in public restrooms.


Peat is organic sediment from decayed plant remains. There are 2 kinds, low and high peat. Peat can be used as litter for the solids container, but from an ecological point of view it is not recommended, as peat is a very slow growing raw material and ecosystems are destroyed during its harvest.


The pH value for liquids indicates whether they are acidic or alkaline. Values from 0-5 are in the acidic range, 6-7 in the neutral range and 8-14 in the alkaline (basic) range. The value can be determined with a litmus strip, which is available in pharmacies and drugstores.


Phypophobia is a phobia that denotes the fear of pooping in public toilets.

Pine bark

The chopped bark of pine trees can be used as litter for the solids container. Since pine trees are largely grown in monocultures, this litter variant is not really optimal. (L: the right litter).

polystyrene (PS)

The Kildwick separators are made of polystyrene (PS) - a plastic that is used in many areas of life and can be recycled optimally.


Self-composting is the composting process used by allotment gardeners and garden owners, garden centres or even garden and cemetery offices. The resulting compost is composted and used on the spot. It may not be resold.

Separation toilet

A separation toilet uses a separating insert. This means that there is a separate opening for urine and faeces. The precipitates can thus be directed into two separate directions / tanks.

Septic pit

A septic pit often occurs in connection with a dump toilet. As the name suggests, it is a deep hole, the outer walls usually consist of concrete. The ground, however, is free of concrete; it has a porous surface, usually earth. Faeces and urine are passed through a pipe into the pit. Liquids seep into the soil; Solids (droppings, toilet paper, etc.) remain in the septic tank. When the tank is filled to a certain level, it is pumped out or closed with soil and a new pit is created. For environmental reasons, septic pits are now banned in many areas in Germany, but are still widespread in other countries (e.g. Canada, USA, Spain and France).

Terra Preta

Terra Preta, also called black soil, is a method developed by the Indians thousands of years ago, to make soil more fertile. For decades, biomass, ashes, bones, human faecal matter and much more have been added to the soil as fertilizer. Many gardeners refer to Terra Preta as the new secret weapon in the garden and there are many rumours surrounding the miracles of the Indian earth. Agronomists disenchant the myth, however: From their point of view, its sale in specialist markets is not only overpriced, but largely superfluous.


The term toilet comes from the French and means a sanitary device for the absorption of body wastes.


TT ist im deutschen Sprachgebrauch als Abkürzung für den Begriff Trenntoilette gängig.

Spelt litter

Spelt litter is the shell of the spelt grain. It absorbs moisture reliably, is easily compostable and binds odours. However the litter dusts a lot and can cause allergic reactions for people with allergies.


The antibacterial additive SteriTouch ensures that the growth of bacteria, fungi and moulds is prevented. SteriTouch is a silver-based ionic material that kills bacteria, mould, etc. on surfaces by damaging cellular respiration. Although SteriTouch cannot kill all bacteria and fungi, at least a majority of them can be reliably eliminated.

Vacuum toilet

In the vacuum toilet, water and feces are removed by means of negative pressure. The extraction is done electronically or pneumatically. Vacuum toilets are mainly used on ships, in airplanes or trains.

wastewater guidelines

Each municipality has its own wastewater directive. Proper handling of the DCT will not conflict with this directive. See also Disposal of urine or solids container


Water Closet.

Worm composting

Worm composting is a composting method in which compost worms are used for the recovery of organic matter. Worm faeces (also called worm tea) are an excellent fertilizer. Bagged worm composter is available for purchase.

Yellow water

Yellow water is the urine collection from separation toilets.