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|style="width:50%;"|{{santable_new|
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Input1=Excreta|Input2=Faeces Blackwater |Input3=Anal cleansing waterFaeces| Input4= Anal Cleansing Water |Input5=Dry Cleansing Materials|Output1=ExcretaSludge | Output2=Faecal sludge | Output3= | Output4= | Output5=|english_link=Single_Pit|french_link=Latrine_traditionnelle|spanish_link=Pozo_Simple|hindi_link=Hindi - coming soon|malayalam_link=Malayalam - coming soon|tamil_link=Tamil - coming soon|korean_link=Korean - coming soon
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A [[Single Ventilated Improved Pit|Ventilated Improved Pit]] (VIP, S.3) is slightly more expensive than a single pit, but greatly reduces the nuisance of flies and odours, while increasing comfort. If a urine-diverting User Interface is used, only faeces are collected in the pit and leaching can be minimized.
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Another variation is the unlined shallow pit that may be appropriate for areas where digging is difficult. When the shallow pit is full, it can be covered with leaves and soil and a small tree can be planted. This concept is called the Arborloo and is a successful way of avoiding costly emptying, while containing excreta, and reforesting an area. The Arborloo is discussed in more detail on the [[Fill and Cover - Arborloo]] section.
===References ===
* ARGOSS (2001). [http://nora.nerc.ac.uk/id/eprint/20757/1/ARGOSS%20Manual.PDF Guidelines for Assessing the Risk to Groundwater from on-Site Sanitation]. British Geological Survey Commissioned Report, CR/01/142, Keyworth, UK. Available at: www.bgs.ac.uk * Brandberg, B. (1997). Latrine Building. A Handbook for Implementation of the Sanplat System. Intermediate Technology Publications, London, UK. (A Book; a good summary of common construction problems and how to avoid mistakes) * Franceys, R., Pickford, J. and Reed, R. (1992). [https://www.susana.org/_resources/documents/default/2-1651-who-a-guide-to-the-development-of-on-site-sanitation.pdf A Guide to the Development of on-Site Sanitation]. WHO, Geneva, CH. Available at: www.susana.org/library (For information on accumulation rates, infiltration rates, general construction and example design calculations) * Graham, J. P. and Polizzotto, M. L. (2013). [https://pubmed.ncbi.nlm.nih.gov/23518813/ Pit Latrines and Their Impacts on Groundwater Quality: A Systematic Review]. Environmental Health Perspectives, National Institute of Environmental Health Sciences, Research Triangle Park, US. Available at: www.ehponline.org * Pickford, J. (1995). Low Cost Sanitation. A Survey of Practical Experience. Intermediate Technology Publications, London, UK.(Book; Information on how to calculate pit size and technology life) * Robens Institute (1996). [http://helid.digicollection.org/en/d/Js13461e/3.4.html Fact Sheets on Environmental Sanitation. Fact Sheet 3.4: Simple Pit Latrines]. University of Surrey, UK and WHO, Geneva, CH. Available at * [http: //www.who.int/water_sanitation_health/publications/guidelines-on-sanitation-and-health/en/ WHO: Guidelines on sanitation and health - 2018]
===Acknowledgements===
{{:Acknowledgements Sanitation}}