Night soil is a euphemism for human excrement collected at night from cesspools, privies, etc. and sometimes used as a fertilizer.[1] Night soil is produced as a result of a waste management system in areas without community infrastructure such as a sewage treatment facility, or individual septic disposal. In this system of waste management, the human feces are collected in solid form.
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Waste management
Collection
Feces are excreted into a container or bucket, and are sometimes collected in the container with urine and other waste. Often the deposition or excretion occurs within the residence, such as in a shophouse faced with overpopulation. This system is used in isolated rural areas and is important in developing nations or in areas that lack the adequate infrastructure to have running water. The material is collected for temporary storage and is disposed of depending on local custom.
Disposal
Disposal has varied through time. In urban areas, usually slums, a night soil collector will arrive regularly, at varying time periods depending on the supply and demand for night soil collection. Usually this occurs during the night, giving the night soil its name.
In isolated rural areas such as in farms, the household will usually dispose of the night soil themselves, but this practice is generally not referred to as night soil, though the eventual fate of the night soil, and style of handling, is similar.[citation needed]
After arriving at a collection point, usually as a special treatment center within the city, or perhaps an open cesspit, methods of dealing with the waste vary. The waste may go on being shipped to another larger center to be ultimately taken care of, or be disposed of at that particular juncture.
Sanitation issues
The use of human feces as fertilizer is a risky practice as it may contain disease-causing pathogens and because it contains heavy metals. Nevertheless, in developing nations it is widespread. Common parasitic worm infections, such as ascariasis, in these countries are linked to night soil, since their eggs are in feces. There have also been cases of disease-carrying tomatoes, lettuce, and other vegetables being imported from undeveloped nations into more developed nations.[citation needed]
Human waste may be attractive as fertilizer because of the high demand for fertilizer and the relative availability of the material to create night soil. In areas where native soil is of poor quality, the local population may weigh the risk of using night soil.
The safe reduction of human waste into compost is possible. Many municipalities create compost from the sewage system biosolids, but then recommend that it only be used on flower beds, not vegetable gardens. Some claims have been made that this is dangerous or inappropriate without the expensive removal of heavy metals. There are other simple yet effective ways to process the compost into safe and usable material. One method that has been successful is known as "humanure" where the material is composted with kitchen refuse and high-carbon materials, such as yard waste, heated through biological activity (fermentation), and kept for an optimal period of time, whereby the pathogens are destroyed. Many people in the United States and other countries have been practicing this method for over ten years now without any negative consequences.[2]
Historical examples
Ancient Attica
The use of sewage as fertilizer was common in ancient Attica. The sewage system of ancient Athens collected the sewage of the city in a large reservoir and thence channeled it to the Cephissus river valley for use as fertilizer.[3]
China and Singapore
The term is known, or even infamous, among the generations that were born in parts of China or Chinatowns (depending on the development of the infrastructure) before 1960. Post-World War II Chinatown, Singapore, before the independence of Singapore utilized night-soil collection as a primary means of waste disposal, especially as much of the infrastructure was damaged and took a long time to rebuild following the Battle of Singapore and subsequent Japanese Occupation of Singapore. Following the development of the economy and the standard of living after independence, the night soil system in Singapore is now merely a curious anecdote from the time of colonial rule when new systems developed. This system is now obsolete in virtually all provinces in China[citation needed].
The collection method is generally very manual and heavily relies on close human contact with the waste. During the Nationalist era when the Kuomintang ruled mainland China, as well as Chinatown in Singapore, the night soil collector usually arrived with spare and relatively empty honey buckets to exchange for the full honey buckets. The method of transporting the honey buckets from individual households to collection centers was very similar to delivering water supplies by an unskilled laborer, with the exception that the item being transported was not at all potable and it was being delivered from the household, rather than to the household. The collector would hang full honey buckets onto each end of a pole he carried on his shoulder and then proceeded to carry it through the streets until he reached the collection point. This was an unpleasant occupation.
United Kingdom
A gong farmer was the term used in Tudor England for a person employed to remove human excrement from privies and cesspits. Gong farmers were only allowed to work at night and the waste they collected had to be taken outside the city or town boundaries. They later became known as "night soil men" or "nightmen".[4]
India
People responsible for the disposal of night soil were considered untouchables in Medieval India. The practice of untouchability was banned when India gained independence. This "manual scavenging" is now illegal in all Indian states, although the practice reportedly continues in many rural areas.[5]
Japan
The reuse of feces as fertilizer was common in Japan. Waste products of rich people were sold at higher prices because their diet was better; therefore, more nutrients remained in their waste. Various historic documents[6] dating from the 9th century detail the disposal procedures for toilet waste.
Selling human waste products as fertilizers became much less common after World War II, both for sanitary reasons and because of the proliferation of chemical fertilizers, and less than 1% is used for night soil fertilization.[7] The presence of the United States occupying force, to whom the use of human waste as fertilizer was seen as unhygienic and suspect, was also a contributing factor: "the Occupationaires condemned the practice, and tried to prevent their compatriots from eating vegetables and fruit from the local markets."[8]
Modern Japan still has areas with ongoing night soil collection and disposal. The Japanese name for the 'outhouse within the house' style toilet, where night soil is collected for disposal, is Kumitori Benjo (汲み取り便所). The proper disposal or recycling of sewage remains an important research area that is highly political.
See also
- Commode
- Composting toilet
- Pail closet
- Ecological sanitation
- Greywater
- Historical Digging
- Humanure
- Jenkem
- Slopping out
- Sewage treatment
References
- ^ "night soil". free online dictionary. Farlex, Inc.. http://www.thefreedictionary.com/night+soil. Retrieved 1 August 2010.
- ^ Jenkins,Joseph The Humanure Handbook ISBN 0964425831 [Amazon-US | Amazon-UK]
- ^ Durant, Will, The Life of Greece, PP. 269
- ^ Fullerton, Susannah (29 January 2004). "How clean was Jane Austen’s London?". www.jasa.net.au. http://www.jasa.net.au/london/sanitation.htm. Retrieved 1 August 2010.
- ^ Zaidi Annie (2006). "Manual scavenging is still a disgusting reality in most States despite an Act of Parliament banning it, Frontline, Volume 23, Issue 18". http://www.flonnet.com/fl2318/stories/20060922005900400.htm. Retrieved 2007-05-07.
- ^ Ebrey, P., Walthall. A., & Palias, J. (2006). Modern east asia: A cultural, social, & political history. Houghton Mifflin Company. Boston & New York. p. 337
- ^ Masao Ukita and Hiroshi Nakanishi (1999). "Pollutant Load Analysis for the Environmental Management of Enclosed Sea in Japan" (PDF). pp. 122. http://www.emecs.or.jp/joint4/joint-pdf/pdf/p121.pdf. Retrieved 2006-10-30.
- ^ http://library.osu.edu/sites/rarebooks/japan/2_7_photos.html
External links
- Necessary and Sufficient - Night soil in colonial America
- Thailand - Pollution from Solid waste and Night Soil
- "feedback on NIGHT SOIL". Mother Earth News. 1973. http://www.motherearthnews.com/arc/4955/.
- Arjun Makhijani and Alan Poole. "Vignettes of Third World Agriculture". Energy and Agriculture in the Third World: A Report to the Energy Policy Project of the Ford Foundation. http://www.fordfound.org/elibrary/documents/0338/toc.cfm.
- Dennis T. Avery. "Why Not A Declaration for Sustainable Farming And Forestry?". Center for Global Food Issues. http://www.cgfi.org/materials/articles/2002/may_22_02.htm.
- "Establishment of Small Scale Business Through Night Soil in Kabul". http://www.pcpafg.org/appeal/appeal1999/compendium_of_project_proposals/sub_provision/sub_folders/wat3_brr.htm.
- The Night Soil Man A novel by T.Wignesan
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