Proceedings

Solids-Free Sewer and Ponds Provide Sustainable Sanitation for a Sri Lankan Hospital

J. Broome1* and G. Morgan2

1 Arup, 78 East Street, Leeds, LS9 8EE, United Kingdom 2 Arup International Development, Arup, 13 Fitzroy Street, London W1T 4B

(free)

International assistance following the Civil War includes a wastewater collection and treatment system for a hospital in northern Sri Lanka.

The hospital is located on an extremely congested site with no room for conventional sewerage or sewage treatment on site. Existing septic tanks are failing and polluting the groundwater while sullage drains untreated from the site causing significant nuisance and health hazards.

The solution adopted uses an ingenious combination of simplified and solids-free sewerage to convey the wastewater, without the need for pumping, to the facultative and maturation ponds located 2 km away on a small site, which floods seasonally.

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