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Phosphorus Treatment by Steel Slag Filters Modelling of Removal Mechanisms and Application for Phosphorus Removal from Septic Tank Effluents

Dominique Claveau-Mallet

Ph.D. thesis (2017)

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Abstract

The first objective of this thesis was to propose a phosphorus treatment system based on a steel slag filter integrated to a septic tank-infiltration bed system. The use of a recirculating steel slag filter was studied in an experimental program (paper #1). Two recirculation modes with various recirculation ratios were tested. The best system was the one with a recirculation from the end to the inlet of the second compartment of a septic tank with a 50% recirculation ratio in the slag filter, achieving 4.2 and 1.9 mg P/L at the effluent for TP and o-PO4, respectively. The 1 mg P/L level goal was not reached, but 79% of phosphorus was kept in the system, compared to 29% without the slag filter.

Résumé

Le premier objectif de cette thèse était de proposer un système de traitement du P incluant un filtre à scories intégré à une chaîne de traitement de fosse septique et élément épurateur. L'utilisation d'un filtre à scories en recirculation dans la fosse septique a été étudiée (article #1). Deux modes de recirculation ont été testés. Le meilleur système a été la recirculation du 2e compartiment vers le 1er compartiment à 50% de recirculation, avec 4.2 et 1.9 mg P/L à l'effluent en P total et ortho-phosphates, respectivement. La cible de 1 mg /L à l'effluent n'a pas été atteinte, mais l'ajout du filtre à scories a permis la rétention de 79% du phosphore, comparativement à 29% sans filtre.

Department: Department of Civil, Geological and Mining Engineering
Program: Génie civil
Academic/Research Directors: Yves Comeau, Benoit Courcelles and Bernard Clément
PolyPublie URL: https://publications.polymtl.ca/2689/
Institution: École Polytechnique de Montréal
Date Deposited: 30 Oct 2017 15:10
Last Modified: 08 Apr 2024 09:03
Cite in APA 7: Claveau-Mallet, D. (2017). Phosphorus Treatment by Steel Slag Filters Modelling of Removal Mechanisms and Application for Phosphorus Removal from Septic Tank Effluents [Ph.D. thesis, École Polytechnique de Montréal]. PolyPublie. https://publications.polymtl.ca/2689/

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