Resumo

RODRIGUEZ-SUAREZ, Leonardo; FALCON-ACOSTA, María del Carmen  e  ORDONEZ-SANCHEZ, Yan Carlos. Characterization of solid waste to liming and fertilizing carrier calcium and nitrogen. cultrop [online]. 2020, vol.41, n.2  Epub 08-Abr-2020. ISSN 1819-4087.

Liquid calcium nitrate is obtained from the reaction between nitric acid and lime hydrate, carriers of the nutrients nitrogen and calcium respectively; the latter coming from the Holguín and Pinar del Río limestone quarries. The generation of solid waste results in the greatest environmental impact of this process. In order to reduce the environmental damage in the Company of Fertilizers and Pesticides of Nuevitas, Camagüey, it is investigated and characterized the residues of the process of obtaining liquid calcium nitrate the objective is to use it as a carrier of nutrients for the crops. It known that these residues still contain nutrients easily assimilated by plants, therefore these can be useful as fertilizer or as an agricultural amendment. The chemical characterization of the residues was used the Cuban Norm 1121: 2016, Cuban Norm 1117: 2016 and American Chemical Society Specifications. The characterization of the sludge obtained in the sedimentation and the insoluble solid of the neutralization reaction give lower nitrogen and calcium values in the solid. Based on the results this waste can use in the agriculture.

Palavras-chave : fertilizers; agricultural amendments; acid soils; environmental impact; NPK.

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