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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. Night soil is a euphemistic term for intentionally collected human feces.

Contents 1 Waste management 1.1 Collection 1.2 Disposal 2 Sanitation issues 3 Historical examples 3.1 China 3.2 Tudor Britain 3.3 India 3.4 Japan 4 See also 5 References 6 External links

Feces are excreted into a container or honey bucket. 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 temporarily and will be disposed of depending on local custom.

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 centre within the city, or perhaps an open cesspit, methods on dealing with the waste varies. The waste may go on being shipped to another larger centre to be ultimately taken care of, or be disposed of at that particular juncture.

Without proper treatment, the use of human feces as fertiliser is a highly hazardous practice because of disease-causing microbes they contain. Nevertheless, in developing nations it is a common practice. Parasitic worm infections, such as Ascariasis in these countries are linked to night soil, since the larvae 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. However, night soil does not necessarily need to be reused as fertiliser and may merely be disposed of and remain unused.

Generally, the human waste is very attractive as fertiliser and is used for this purpose because of the high demand for fertiliser and the relative availability of the material to create night soil. In areas where native soil is of poor quality, the local population weigh the risk of using night soil. Choosing between starvation and ultimate death due to low crop yields or the possibility of serious illness due to disease is easy.

The safe reduction of human waste into compost is possible, but fairly complex. Many municipalities create compost from the city sewage system, 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.

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 utilised 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 subsequent 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. The system has been replaced in most parts of the People's Republic of China although still present in some places.

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 centres 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 and was predominately done by manual labourers.

A gong farmer was the term used in Tudor Britain 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.

India's ancient caste system assigned untouchables with the disposal of night soil. This "manual scavenging" is now illegal in most Indian states, although the practice undoubtedly continues in many rural areas.^{[citation needed]}

The reuse of feces as fertilizer^[1] was common in Japan. Waste products of rich people were sold at higher prices because their diet was better.^[2] Various historic documents dating from the 9th century detail the disposal procedures for toilet waste.^[3]

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.^[4][5]

The proper disposal or recycling of sewage remains an important research area that is highly political.

• Humanure
• Composting toilet
• Ecological sanitation
• Greywater
• Slopping out
• Sewage treatment

1. ^ The History of Toilets in Japan. Web Japan. Retrieved on October 30, 2006.
2. ^
3. ^
4. ^ Masao Ukita and Hiroshi Nakanishi (1999). Pollutant Load Analysis for the Environmental Management of Enclosed Sea in Japan (PDF) 122. Retrieved on October 30, 2006.
5. ^

• Thailand - Pollution from Solid waste and Night Soil
• feedback on NIGHT SOIL. Mother Earth News (1973).
• 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. 
• Dennis T. Avery. Why Not A Declaration for Sustainable Farming And Forestry?. Center for Global Food Issues.
• Establishment of Small Scale Business Through Night Soil in Kabul.

	Topics related to waste management	edit
Anaerobic digestion | Composting | Incineration | Landfill | Mechanical biological treatment | Radioactive waste | Recycling | Regiving | Sewerage | Waste | Waste collection | Waste sorting | Waste hierarchy | Waste management | Waste management concepts | Waste legislation | Waste treatment technology