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fermer ce livreA Guide to the Development of on-site Sanitation (WHO; 1992; 246 pages)
Afficher le documentPreface
fermer ce répertoirePart I. Foundations of sanitary practice
ouvrir ce répertoire et afficher son contenuChapter 1. The need for on-site sanitation
ouvrir ce répertoire et afficher son contenuChapter 2. Sanitation and disease transmission
ouvrir ce répertoire et afficher son contenuChapter 3. Social and cultural considerations
fermer ce répertoireChapter 4. Technical options
Afficher le documentOpen defecation
Afficher le documentShallow pit
Afficher le documentSimple pit latrine
Afficher le documentBorehole latrine
Afficher le documentVentilated pit latrine
Afficher le documentPour-flush latrine
Afficher le documentSingle or double pit
Afficher le documentComposting latrine
Afficher le documentSeptic tank
Afficher le documentAqua-privy
Afficher le documentRemoval systems for excreta
ouvrir ce répertoire et afficher son contenuPart II. Detailed design, construction, operation and maintenance
ouvrir ce répertoire et afficher son contenuPart III. Planning and development of on-site sanitation projects
Afficher le documentReferences
Afficher le documentSelected further reading
Afficher le documentGlossary of terms used in this book
Afficher le documentAnnex 1. Reuse of excreta
Afficher le documentAnnex 2. Sullage
Afficher le documentAnnex 3. Reviewers
Afficher le documentSelected WHO publications of related interest
Afficher le documentBack Cover
 

Septic tank

A septic tank is an underground watertight settling chamber into which raw sewage is delivered through a pipe from plumbing fixtures inside a house or other building. The sewage is partially treated in the tank by separation of solids to form sludge and scum. Effluent from the tank infiltrates into the ground through drains or a soakpit. The system works well where the soil is permeable and not liable to flooding or waterlogging, provided the sludge is removed at appropriate intervals to ensure that it does not occupy too great a proportion of the tank capacity.

Advantages

Disadvantages

Gives the users the convenience of a WC

High cost

 

Reliable and ample piped water required

 

Only suitable for low-density housing

 

Regular desludging required, and sludge needs careful handling

 

Permeable soil required

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