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cerrar este libroA Guide to the Development of on-site Sanitation (WHO; 1992; 246 pages)
Ver el documentoPreface
cerrar esta carpetaPart I. Foundations of sanitary practice
abrir esta carpeta y ver su contenidoChapter 1. The need for on-site sanitation
abrir esta carpeta y ver su contenidoChapter 2. Sanitation and disease transmission
abrir esta carpeta y ver su contenidoChapter 3. Social and cultural considerations
cerrar esta carpetaChapter 4. Technical options
Ver el documentoOpen defecation
Ver el documentoShallow pit
Ver el documentoSimple pit latrine
Ver el documentoBorehole latrine
Ver el documentoVentilated pit latrine
Ver el documentoPour-flush latrine
Ver el documentoSingle or double pit
Ver el documentoComposting latrine
Ver el documentoSeptic tank
Ver el documentoAqua-privy
Ver el documentoRemoval systems for excreta
abrir esta carpeta y ver su contenidoPart II. Detailed design, construction, operation and maintenance
abrir esta carpeta y ver su contenidoPart III. Planning and development of on-site sanitation projects
Ver el documentoReferences
Ver el documentoSelected further reading
Ver el documentoGlossary of terms used in this book
Ver el documentoAnnex 1. Reuse of excreta
Ver el documentoAnnex 2. Sullage
Ver el documentoAnnex 3. Reviewers
Ver el documentoSelected WHO publications of related interest
Ver el documentoBack Cover
 

Shallow pit

People working on farms may dig a small hole each time they defecate and then cover the faeces with soil. This is sometimes known as the "cat" method. Pits about 300 mm deep may be used for several weeks. Excavated soil is heaped beside the pit and some is put over the faeces after each use. Decomposition in shallow pits is rapid because of the large bacterial population in the topsoil, but flies breed in large numbers and hookworm larvae spread around the holes. Hookworm larvae can migrate upwards from excreta buried less than 1 m deep, to penetrate the soles of the feet of subsequent users.

Advantages

Disadvantages

No cost

Considerable fly nuisance

Benefit to farmers as fertilizer

Spread of hookworm larvae

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