Abstract

MARTINEZ-HERNANDEZ, Carlos M. et al. Use of effluents from Oxidation Lagoons of the “Carlos Baliño” Complex as Organic Fertilizers. Rev Cie Téc Agr [online]. 2021, vol.30, n.1  Epub Mar 01, 2021. ISSN 2071-0054.

The work was carried out with the objective of determining the properties of the effluents of the oxidation lagoon of "Carlos Baliño" and "Melanio Hernández" sugar mills as organic fertilizer; as well as the possibility of their decontamination. The effluents were taken at the central region of Cuba (Santo Domingo, Villa Clara and Tuinicú, Sancti Spíritus). The decontamination effect of a slow filter of sand was proven in cascades before different dilutions in distilled water of the samples of the valued treatment T1 (10%), T2 (25%), T3 (50%), T4 (75%), T5 and T6 (not diluted). Physical-chemical and microbiologic characteristics of effluents were determined, before and after their passing through slow filters of sand; later on, their effect like organic bio fertilizer was valued. Corn (Zea mays) was taken as indicator cultivation whose morphological and physiological parameters were valued. Physical-chemical properties of the soil samples were also valued. The analysis of the effluents like bio-fertilizers showed that none of the valued treatments exceeded the control TO (93,33%) in the germination percent variable (mean value). Treatment T2 (86,66%) presented the best behavior compared to the control TO, while in treatments T3 (60%) and T6 (40%), a fall of this variable was presented. In the case of treatment T6, the abrupt fall of this variable, could be related to the aggressiveness of the non-dilute effluents of the sugar mill "Melanio Hernández" oxidation lagoon.

Keywords : effluents of oxidation lagoons; organic fertilizer; slow filters of sand.

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