Waste Management

R. Franceys's A Guide to the Development of On-Site Sanitation PDF

By R. Franceys

ISBN-10: 9241544430

ISBN-13: 9789241544436

Offers designated functional and technical suggestion meant to steer the choice, layout, building, and upkeep of on-site amenities for the removing of human excreta. Addressed to engineers, sanitarians, clinical officials, and undertaking planners, the publication concentrates on technical innovations appropriate for homeowners construction their very own latrines, even if in small groups, rural components, or disadvantaged city settlements. information variety from line drawings illustrating beneficial properties of layout and development, via a listing of the explanation why more desirable sanitation might elicit unfavourable responses from clients, to directions for calculating the inner dimensions of a septic tank.
The publication positive aspects 11 chapters in 3 components. Chapters within the first half introduce the rules of sanitary perform, describe the hyperlinks among excreta and sickness, and clarify the various social and cultural elements that has to be thought of on the making plans section. Chapters within the moment and so much large half offer a close technical consultant to the layout, building, operation and upkeep of the entire major techniques for on-site sanitation. Chapters describe how the differing kinds of latrine paintings, talk about their relative advantages, and set out distinct plans for the development of latrines and their parts. the ultimate half beneficial properties 3 chapters at the making plans and improvement of on-site sanitation tasks, underscoring the necessity for a radical research of cultural in addition to layout positive aspects.

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Extra info for A Guide to the Development of On-Site Sanitation

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1. Comparison of the numbers of files leaving the squat holes of a simple pit latrine and a VIP latrine a Period of trapping No. trapped in unvented privy No. trapped in vented privy 8 October-5 November 1723 5 5 November-3 December 5742 20 3-24 December 6488 121 a Source: Morgan, 1977. Ventilated double-pit latrines Although it is usually best to provide large deep pits, this may not be possible where rock or groundwater lie within one or two metres of the ground surface. A variation of the VIP latrine suitable for such situations has two shallow pits side by side under a single superstructure (Fig.

40-41. 4. Recommended infiltration capacities a Type of soil Infiltration capacity, settled sewage (I per m² per day) Coarse or medium sand 50 Fine sand, loamy sand 33 Sandy loam, loam 25 Porous silty clay and porous silty clay loam 20 Compact silty loam, compact silty clay loam and non-expansive clay 10 Expansive clay <10 a Source: US Environmental Protection Agency 1980 Groundwater pollution risk This section summarizes the likely effects of on-site sanitation systems on groundwater and the ways in which pollution can be minimized.

The superstructure design is irrelevant to the operation of the latrine but crucial to the acceptability of the latrine to the user. Superstructures range from a simple shelter of sacks or sticks to a building of bricks or blocks costing more than the rest of the latrine. The choice of superstructure will reflect the income and customs of the user. Fig. 3. Simple pit latrine The cover slab should be raised at least 150 mm above the surrounding ground to divert surface water away from the pit. Commonly, the cover slab sits directly on the lining, but if the lining is made of very thin material, such as an old oil drum, a concrete foundation beam may be necessary to distribute the load of the slab to the lining and surrounding ground (Fig.

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A Guide to the Development of On-Site Sanitation by R. Franceys

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