Solid–liquid separation of animal slurry in theory and practice. A review | Agronomy for Sustainable Development, Agronomy

EDPS Account

Volume 30 / No 1 (January-March 2010)

Agron. Sustain. Dev., 30 1 (2010) 153-180

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Review

Table X

Separation efficiency of struvite precipitation and sedimentation.

Addition	Slurry			Separation index (%)²

	Origin¹	Dry matter (%)		N-total	P-total	Reference
Mean				16	63
(Standard deviation)				(1)	(37)
Mg, OH⁻	P				85	Nelson et al., 2003
Mg, NH₃	P				60	Bowers and Westerman, 2003
Mg, increase pH	P	18			18	Suzuki et al., 2007
Mg, increase pH	P	18			49	Suzuki et al., 2007
Mg, increase pH	P				96	Burns et al., 2003
Mg, increase pH	P				98	Burns et al., 2003
Fe, OH	P			17	98	Laridi et al., 2005
Fe, OH	P			15	99	Laridi et al., 2005
Mg, NH₃	C				8	Sheffield et al., 2005
Mg, NH₃	C				19	Sheffield et al., 2005

¹

P = pig, C = cattle.

²

Separation index is the mass of a compound in the solid fraction compared to the mass of a compound in the original raw slurry.