![Nuevo ArborLoo para Miguelillo 2](https://upload.wikimedia.org/wikipedia/commons/f/fa/Nuevo_ArborLoo_para_Miguelillo_2.jpg)
A treebog is a type of
low-tech
Low technology (low tech; adjective forms: low-technology, low-tech, lo-tech) is simple technology, as opposed to '' high technology''.
History Historical origin
Primitive technologies such as bushcraft, tools that use wood, stone, whoo ...
compost toilet
A composting toilet is a type of dry toilet that treats human waste by a biological process called composting. This process leads to the decomposition of organic matter and turns human waste into compost-like material. Composting is carried ou ...
. It consists of a raised platform above a compost pile surrounded by densely planted
willow trees
Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist so ...
or other nutrient-hungry vegetation. It can be considered an example of
permaculture
Permaculture is an approach to land management and settlement design that adopts arrangements observed in flourishing natural ecosystems. It includes a set of design principles derived using whole-systems thinking. It applies these principle ...
design, as it functions as a system for converting urine and feces to
biomass
Biomass is plant-based material used as a fuel for heat or electricity production. It can be in the form of wood, wood residues, energy crops, agricultural residues, and waste from industry, farms, and households. Some people use the terms bi ...
, without the need to handle excreta.
Defecating in nature is frowned upon in most countries, as it pollutes the environment and causes health problems. High levels of open defecation are linked to high
child mortality
Child mortality is the mortality of children under the age of five. The child mortality rate, also under-five mortality rate, refers to the probability of dying between birth and exactly five years of age expressed per 1,000 live births.
It en ...
,
poor nutrition,
poverty
Poverty is the state of having few material possessions or little income. Poverty can have diverse social, economic, and political causes and effects. When evaluating poverty in ...
, and large disparities between the rich and the poor.
Human faeces normally take about a year to biodegrade outdoors. In the UK, a system like this is potentially legal, so long as it not in a public place, i.e. on a large private estate.
Etymology
The term "Treebog" was coined by Jay Abrahams. ''
Bog'' is a
British English
British English (BrE, en-GB, or BE) is, according to Lexico, Oxford Dictionaries, "English language, English as used in Great Britain, as distinct from that used elsewhere". More narrowly, it can refer specifically to the English language in ...
slang word for
toilet
A toilet is a piece of sanitary hardware that collects human urine and feces, and sometimes toilet paper, usually for disposal. Flush toilets use water, while dry or non-flush toilets do not. They can be designed for a sitting position popu ...
, not to be confused with its other meaning of
wetland
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...
.
History
![Plastic snow mesh](https://upload.wikimedia.org/wikipedia/commons/1/1f/Plastic_snow_mesh.jpg)
The treebog is a simple method of composting wastes. Abrahams claims that from 1995-2011, around 1500 treebogs may have been built in Britain.
In 2011, Abrahams claimed that the treebog had attracted the attention of NGOs and aid workers who hope to develop its potential for shanty towns or refugee camps - anywhere that water is scarce and the
population pressure
Population pressure, a term summarizing the stress brought about by an excessive population density and its consequences, is used both in conjunction with human overpopulation and with other animal populations that suffer from too many individuals ...
on resources is high.
Plant growth
A treebog is simply a controlled
compost heap
Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical and biological properties. It is commonly prepared by decomposing plant, food waste, recycling organic materials and manure. The resulting m ...
whose function has been enhanced by use of moisture or nutrient-hungry trees. They use no water, purify waste as they create a biomass resource, and also contain the organic waste material, thus preventing the spread of disease.
The main requirement is that the planted species should be nutrient-hungry. It is a bonus if they can be harvested or
pollarded for productive uses, e.g. willow cultivars. Apart from willows, mint will thrive around a treebog. If left unmanaged, a treebog will soon be surrounded by weed species, such as nettles.
Both the solids and liquids are deposited within the treebog base, where the solids compost and the liquids soak through the soil. The roots and associated mycorrhizal species allow the nitrogen to be absorbed. The faeces should be well ventilated to allow aerobic decomposition.
Construction
![Short rotation coppice (SRC) willow - geograph](https://upload.wikimedia.org/wikipedia/commons/2/24/Short_rotation_coppice_%28SRC%29_willow_-_geograph.org.uk_-_848097.jpg)
A seating platform/cubicle is mounted at least one meter high. The area beneath the seating platform is enclosed by two layers of
chicken wire
Chicken wire, or poultry netting, is a mesh of wire commonly used to fence in fowl, such as chickens, in a run or coop. It is made of thin, flexible, galvanized steel wire with hexagonal gaps. Available in 1 inch (about 2.5 cm) diameter, ...
or plastic
mesh
A mesh is a barrier made of connected strands of metal, fiber, or other flexible or ductile materials. A mesh is similar to a web or a net in that it has many attached or woven strands.
Types
* A plastic mesh may be extruded, oriented, ex ...
, which act as an effective child-proof barrier and allows air to circulate through the compost heap. Plastic mesh or chicken wire coated in plastic would prevent problems with rusting.
Sawdust, straw, woodchip, ash or other high-carbon matter is used to cover the excrement and balance the high nitrogen content of the urine. One design uses bran to help mitigate the odours.
The space between the two layers of mesh is stuffed with straw, which acts as a wick to help sop up excess urine, preventing the likelihood of odour problems due to incomplete biological absorption of the nitrogen from the urine. The straw-filled wire also enables the pile to be well-aerated whilst acting as a visual screen for the first year’s use.
The structure is surrounded by two closely planted rows of ''
Salix viminalis
''Salix viminalis'', the basket willow, common osier or osier, is a species of willow native to Europe, Western Asia, and the Himalayas.Meikle, R. D. (1984). ''Willows and Poplars of Great Britain and Ireland''. BSBI Handbook No. 4. .Rushforth, K ...
'' or other
willow
Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist s ...
cuttings; this living wall of willow can then be woven into a hurdle-like structure and its annual growth can be harvested.
See also
*
Arborloo
An arborloo is a simple type of composting toilet in which feces are collected in a shallow pit and a fruit tree is later planted in the fertile soil of the full pit. Arborloos have: a pit like a pit latrine but less deep; a concrete, ferrocement ...
, a similar concept, in which excrement goes into a hole in the ground and, when the hole starts to fill, the outhouse is moved to another hole, and a tree is planted in the old hole.
*
Ecological sanitation
Ecological sanitation, commonly abbreviated as ecosan (also spelled eco-san or EcoSan), is an approach to sanitation provision which aims to safely reuse excreta in agriculture. It is an approach, rather than a technology or a device which is ch ...
*
Reuse of excreta
Reuse of human excreta is the safe, beneficial use of treated human excreta after applying suitable treatment steps and risk management approaches that are customized for the intended reuse application. Beneficial uses of the treated excreta may ...
*
Urine-diverting Dry Toilet
A urine-diverting dry toilet (UDDT) is a type of dry toilet with urine diversion that can be used to provide safe, affordable sanitation in a variety of contexts worldwide. The separate collection of feces and urine without any flush water has m ...
References
*
External links
Build your own Treebog
{{DEFAULTSORT:Tree Bog
Toilets
Toilet types
Phytoremediation plants
Home composting
Permaculture
Sustainable building
Sustainable technologies
Bioremediation