ChazarencBrissonComeau2007

Référence

Chazarenc, F., Brisson, J. and Comeau, Y. (2007) Slag columns for upgrading phosphorus removal from constructed wetland effluents. Water Science and Technology, 56(3):109-115. (Scopus )

Résumé

The current best option to upgrade constructed wetlands (CWs) for phosphorus (P) retention, in terms of efficiency, cost and simplicity, consists in using media having a strong P affinity. The media can be used either in the planted beds or in a filtration system downstream of the beds. The use of slag filters was shown to be efficient for removing P from wastewater as it represented a slow release source of calcium and hydroxide, favouring the formation of hydroxyapatite. Our study aimed at maximising the P retention capacity of slag filters located at the outlet of CWs since electric arc furnace slag has been shown to inhibit the growth of macrophytes when used in the filtration matrix. Bench-scale columns (Vtot = 6.2 L) filled with various combinations of filter media (slag, granite, limestone) of different sizes (2-5, 5-10, 10-20 mm) were fed on-site during four months with a CW effluent (in mg/ L: 30 COD, 30 TSS, 10 Pt). Results showed that the best media combination enabling the maximum o-PO4 retention (more than 80% removal without clogging) consisted in a series of a ternary mix column (slag 5-10 mm, granite 2-5 mm, limestone 5-10 mm) followed by a slag column (slag 5-10 mm). Plilot scale columns (Vtot = 300 L), filled with the best media combination, were installed at the outlet of a 28m2 CW. These columns showed more than 75% removal efficiency during one year and were designed to be easily replaced each year. © IWA Publishing 2007.

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@ARTICLE { ChazarencBrissonComeau2007,
    AUTHOR = { Chazarenc, F. and Brisson, J. and Comeau, Y. },
    TITLE = { Slag columns for upgrading phosphorus removal from constructed wetland effluents },
    JOURNAL = { Water Science and Technology },
    YEAR = { 2007 },
    VOLUME = { 56 },
    PAGES = { 109-115 },
    NUMBER = { 3 },
    ABSTRACT = { The current best option to upgrade constructed wetlands (CWs) for phosphorus (P) retention, in terms of efficiency, cost and simplicity, consists in using media having a strong P affinity. The media can be used either in the planted beds or in a filtration system downstream of the beds. The use of slag filters was shown to be efficient for removing P from wastewater as it represented a slow release source of calcium and hydroxide, favouring the formation of hydroxyapatite. Our study aimed at maximising the P retention capacity of slag filters located at the outlet of CWs since electric arc furnace slag has been shown to inhibit the growth of macrophytes when used in the filtration matrix. Bench-scale columns (Vtot = 6.2 L) filled with various combinations of filter media (slag, granite, limestone) of different sizes (2-5, 5-10, 10-20 mm) were fed on-site during four months with a CW effluent (in mg/ L: 30 COD, 30 TSS, 10 Pt). Results showed that the best media combination enabling the maximum o-PO4 retention (more than 80% removal without clogging) consisted in a series of a ternary mix column (slag 5-10 mm, granite 2-5 mm, limestone 5-10 mm) followed by a slag column (slag 5-10 mm). Plilot scale columns (Vtot = 300 L), filled with the best media combination, were installed at the outlet of a 28m2 CW. These columns showed more than 75% removal efficiency during one year and were designed to be easily replaced each year. © IWA Publishing 2007. },
    COMMENT = { Export Date: 1 June 2009 Source: Scopus doi: 10.2166/wst.2007.499 },
    EDITOR = { J.M., Novais },
    KEYWORDS = { Electric arc furnace steel slag, Limestone, Phosphorus retention, Electric furnaces, Filters (for fluids), Filtration, Phosphorus, Removal, Constructed wetland, Electric arc furnace, Phosphorus retention, Slag filter, Ternary mix column, Effluent treatment, calcium, hydroxide, hydroxyapatite, limestone, oxygen, phosphate, phosphorus, Effluent treatment, Electric furnaces, Filters (for fluids), Filtration, Phosphorus, Removal, constructed wetland, efficiency measurement, effluent, filtration, phosphorus, retention, slag, wastewater, chemical oxygen demand, conference paper, constructed wetland, controlled study, effluent, filtration, granite, macrophyte, pisciculture, quantitative analysis, slag, sludge treatment, waste component removal, waste water management, Biodegradation, Environmental, Environment Design, Filtration, Phosphorus, Plants, Waste Disposal, Fluid, Water Purification, Wetlands },
    OWNER = { Luc },
    TIMESTAMP = { 2009.06.01 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-34548269994&partnerID=40 },
}

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