Sludge removal from some wastewater stabilization ponds

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 pumpin...

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Bibliographic Details
Published inWater science and technology Vol. 22; no. 3-4; pp. 247 - 252
Main Authors CARRE, J, LAIGRE, M. P, LEGEAS, M
Format Conference Proceeding Journal Article
LanguageEnglish
Published London IWA Publishing 01.03.1990
Subjects
Accumulation
Agronomy
Applied sciences
Emptying
Environmental Sciences
Exact sciences and technology
Fertilizers
Pollution
Ponds
Removal
Sludge
Stabilization
Stabilization ponds
Wastewater
Wastewater treatment
Water treatment and pollution
desludging
Wastewater stabilization pond
technical and economical aspects
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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SourceType-Scholarly Journals-2
SourceType-Conference Papers & Proceedings-1
ObjectType-Conference-3
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1990.0208