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Journal Articles Water Science and Technology Year : 1990

Sludge Removal from Some Wastewater Stabilization Ponds

M. Laigre
  • Function : Author

Abstract

The study of sludge accumulation in the first ponds of 12 treatment plants under oceanic climate showed a mean rate of accumulation of 2.8 cm per year corresponding to 0.12 m3 of sludge per inhabitant per year. Desludging was required about operation periods of 6 or 7 years. Sludge removal by pumping after or without emptying water is the most convenient and with a mean cost of 40FF per m3 the cheapest method. Mean desludging cost is eight times lower than mean investment cost. With regard to their agronomic characteristics stabilization pond sludges have a low fertilizer value because of their long maturation time.
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Dates and versions

hal-04065002 , version 1 (11-04-2023)

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Jean Carré, M. Laigre, Michèle Legeas. Sludge Removal from Some Wastewater Stabilization Ponds. Water Science and Technology, 1990, 22 (3-4), pp.247-252. ⟨10.2166/wst.1990.0208⟩. ⟨hal-04065002⟩

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EHESP UNIV-RENNES
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