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Precipitation of Liquid Swine Manure Phosphates Using Magnesium Smelting By-Products

^a Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre, 2560 Hochelaga Blvd., Quebec, QC, Canada G1V 2J3
^b Norsk Hydro Canada Inc., 7000 Raoul-Duchesne Blvd., Bécancour, QC, Canada G9H 2V3

View larger version (19K): [in this window] [in a new window]   Fig. 1. Total P concentration in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before each sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.

View larger version (21K): [in this window] [in a new window]   Fig. 2. Soluble phosphorus (PO4–P) concentration in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.

View larger version (20K): [in this window] [in a new window]   Fig. 3. Total N concentration in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.

View larger version (22K): [in this window] [in a new window]   Fig. 4. Total Mg concentration in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.

View larger version (21K): [in this window] [in a new window]   Fig. 5. pH in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.

View larger version (21K): [in this window] [in a new window]   Fig. 6. Total Ca concentration in the liquid fraction of two types of liquid swine manure (nursery and grower-finisher) treated with different amounts of Mg in the form of by-product of electrolysis and foundries (BPEF) as a function of time (2–360 h) with x-axis on a log scale; the mixed control treatment received no BPEF but was stirred before sampling. Vertical bars represent the LSD values (P 0.05) at each sampling time.