Solid/Liquid Separation of Pig Manure by Biological Flotation: Pilot-Scale Study

Many problems are associated with pig manure production like high biochemical oxygen demand, chemical oxygen demand, nitrogen, and phosphorus contents. Manure produces may be used in land spreading for agricultural purposes. Over application of liquid manure or runoff caused by precipitation contrib...

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Veröffentlicht in:Journal of environmental engineering (New York, N.Y.) N.Y.), 2009-09, Vol.135 (9), p.869-875
Hauptverfasser: Meunier, Nathalie, Chartier, Myriam, Mercier, Guy, Blais, Jean-François
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container_end_page 875
container_issue 9
container_start_page 869
container_title Journal of environmental engineering (New York, N.Y.)
container_volume 135
creator Meunier, Nathalie
Chartier, Myriam
Mercier, Guy
Blais, Jean-François
description Many problems are associated with pig manure production like high biochemical oxygen demand, chemical oxygen demand, nitrogen, and phosphorus contents. Manure produces may be used in land spreading for agricultural purposes. Over application of liquid manure or runoff caused by precipitation contribute notably to surface or overland flow of phosphorus. In this study, the LISOX process is proposed for use in medium size farms, namely a 2,000-head swine farm. The LISOX process uses biological passive flotation, without any gas addition, to enable the flocs to rise to the surface. Results show that this technology is able to considerably reduce the solids content in the final effluent to 1.1±0.3% and reached solids content of 17.9±2.6% in the combined solid manure obtained at the end of the LISOX process. Total phosphorus ( Pt ) concentrations have been reduced from 1,234±428 mg/L to 146±46 mg/L in the final effluent, while a value of Pt of 20.6±7.9 g/kg has been obtained in the final solid fraction of the treated manure. The initial ammonium ion/total phosphorus ratio of 2.3±1.0 has been increased to respectively 16.4±4.6 and 17.6±5.4 after the primary and the secondary flotation, which is clearly much higher than the target value ( NH4 / Pt >7 ) .
doi_str_mv 10.1061/(ASCE)EE.1943-7870.0000046
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source American Society of Civil Engineers:NESLI2:Journals:2014; Business Source Complete
subjects Applied sciences
Exact sciences and technology
General treatment and storage processes
Natural water pollution
Pollution
Rainwaters, run off water and others
TECHNICAL PAPERS
Wastes
Water treatment and pollution
title Solid/Liquid Separation of Pig Manure by Biological Flotation: Pilot-Scale Study
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