Struvite crystallization mitigates reactive N losses from swine manure in-vessel composting.

ABSTRACT: We assessed the addition Mg and P salts to promote struvite crystallization and mitigate reactive N losses from a rotating drum (12 m3 ) used for in-vessel composting of swine manure. The tested treatments were: mixture of sawdust and swine manure (baseline) and the same mixture with the addition of magnesium sulfate and phosphoric acid (MgSO4+H3PO4). Struvite crystallization decreased NH3-N and TN losses by 96.5 and 46%, respectively. Higher N2O-N emissions were related with resolubilization of the struvite under lower pH conditions. Further research is needed to assess strategies for the stabilization of struvite crystals, minoring N losses and increasing nutrient concentration value of the organic compost.

Bibliographic Details

Main Authors:	NICOLOSO, R. da S., HIGARASHI, M. M., OLIVEIRA, L. V., DALLA COSTA, M.
Other Authors:	RODRIGO DA SILVEIRA NICOLOSO, CNPSA; MARTHA MAYUMI HIGARASHI, CNPSA; LILIANE VIEIRA OLIVEIRA, UDESC/Lages; MORGANA DALLA COSTA, FACC.
Format:	Separatas biblioteca
Language:	English eng
Published:	2017-10-27
Subjects:	Suíno, Abate, Compostagem, Adubo orgânico,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078327
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