Abstract

MARTINEZ-HERNANDEZ, Carlos M.; SANCHEZ-JASSA, Jesús A.; MARTINEZ-FLORES, Nilda Rosa  and  GOMEZ-RIOS, István. Application of Slow Sand Filters for the Decontamination of Effluents from Oxidation Lagoons. Rev Cie Téc Agr [online]. 2022, vol.31, n.4  Epub Nov 01, 2022. ISSN 2071-0054.

Using slow sand filters on a small scale, their decontaminating effect was tested. The work was carried out with the objective of eliminating the contamination of the effluents from the oxidation lagoons of two sugar mills "Carlos Baliño" and "Melanio Hernández". The effluents were taken in the central region of the country (Santo Domingo, Villa Clara and Tuinicú, Sancti Spíritus). The decontaminating effect of effluents from oxidation ponds after their passage through a slow sand filter in cascades was tested for different investigated treatments. The effluents were diluted in distilled water in the following proportions: T1 (10%), T2 (25%), T3 (50%), T4 (75%), T5 and T6 (undiluted). In the effluents, the following were determined: their physical-chemical and microbiological characteristics, before and after their passage through the slow sand filters. In most of the effluents evaluated, both their physical-chemical characteristics and the microbial load showed a notable reduction; obtaining values ​​below the indicators allowed by current Cuban standards (NC-27: 2012; NC-1095: 2015 and NC-855: 2011).

Keywords : Oxidation Ponds; Physical-Chemical and Microbiological Characteristics; Slow Sand Filters.

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