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Comparaison théorique de dispositifs d'ANC : les filières par "cultures fixées sur support grossier" autorisées au 15 novembre 2014

Abstract : The order liying down the technical requirements relating to the onsite treatment system receiving a daily organic load lower or equal to 1,2 kg of BOD5 lead to the development of new technical devices. This report is designed to summarize the regulation elements available on interdepartmental website about on site treatment. This report deals only with one type of devices: the attached growth system on big media. This synthesis report includes 5 technical approvals bases on bio discs and their related available user manuals; it concerns only one manufacturer. The sizes are between 5 and 18 PE. The base of sizing used for biological degradation is similar to those used for collective sewerage. User manuals mention coherent frequencies of emptying of sludge storages with the classical knowledge. This important rhythm of twice a year, main part of maintenance, represents a significant operation cost. One of the models for the size 5PE presents an exception: biological muds are stored in the clarifier. To prevent the degradation of the effluent quality by the rises of muds due to the anaerobic degradation, it is necessary to increase the frequencies of emptying the sludge storage. This theoretical analysis will be completed by in situ measurements which should emphasize the relevance of the constructive elements of the new devices.
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https://hal.inrae.fr/hal-02601647
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Submitted on : Saturday, May 16, 2020 - 6:52:41 AM
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  • HAL Id : hal-02601647, version 1
  • IRSTEA : PUB00044833

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C. Gervasi, Catherine Boutin, Vivien Dubois. Comparaison théorique de dispositifs d'ANC : les filières par "cultures fixées sur support grossier" autorisées au 15 novembre 2014. [Rapport de recherche] irstea. 2014, pp.16. ⟨hal-02601647⟩

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