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Association of stabilization ponds and intermittent sand filters: an appropriate wastewater treatment system for small communities

Abstract : For the treatment of wastewater generated by a small community (Aurignac), a scheme was built consisting on a Settling Tank (ST), a Wastewater Stabilization Pond (WSP) and Intermittent Sand Filters (ISFs). The sludge train consists on a device pumping the sludge from the small settling tank before the pond, which is sent to Sludge Dewatering Reed Beds (SDRBs). The performance of the full-scale demonstration facility was evaluated during 2 years. The setting-up of the ST with SDRBs resulted to be a simple and effective option to diminish the SS load (50 %) arriving to the WSP; thus reducing sludge accumulation in the bottom of the WSP. The WSP performed well with high removal rates for all contaminants. The WSP effluent quality was not sufficient according to the limits set by the French regulations for disposal into sensitive areas or for reuse; which corroborates the necessity of an additional treatment. The implementation of ISFs after WSP was confirmed to be a good alternative. The results demonstrated the suitability of this wastewater treatment train for rural communities with combined sewerage system, due to its simplicity for operation and maintenance, the hydraulic capability of the system (allowing the plant to withstand high flow variations) and the high quality of the final effluent (< 100 mg/L COD,
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  • HAL Id : hal-02588336, version 1
  • IRSTEA : PUB00020389

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A. Torrens, Pascal Molle, Catherine Boutin, M. Salgot. Association of stabilization ponds and intermittent sand filters: an appropriate wastewater treatment system for small communities. 7th Specialised Conference on Small Water and Wastewater Systems, Mexico, MEX, 7-10 mars 2006, Mar 2006, Mexico, Mexico. pp.9. ⟨hal-02588336⟩

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