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Open AccessArticle

Hydraulic Behavior and Chemical Characterization of Lapilli as Material for Natural Filtering of Slurry

1
Departamento de Producción Animal, Grupo Investigación GEOVOL, Universidad de Las Palmas de Gran Canaria, Fac. Veterinaria, Arucas 35013, Spain
2
Laboratorio agroalimentario y fitopatológico del Cabildo de Gran Canaria, Arucas 35013, Spain
3
Departamento de Biología Animal, Edafología y Geología, Universidad de La Laguna, San Cristóbal de La Laguna 38071, Spain
4
Departamento de Ingeniería de Procesos, Control Analítico de Fuentes Medioambientales, CAFMA Universidad de Las Palmas de Gran Canaria, Campus Tafira, Las Palmas de Gran Canaria 35017, Spain
5
Departamento de Ingeniería, Producción y Economía Agraria, Universidad de La Laguna, San Cristóbal de La Laguna 38071, Spain
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Miklas Scholz
Water 2015, 7(6), 2840-2850; https://doi.org/10.3390/w7062840
Received: 13 April 2015 / Accepted: 5 June 2015 / Published: 15 June 2015
(This article belongs to the Special Issue Study, Development and Management of Water in Volcanic Areas)
Livestock effluents are a beneficial nutrient supply for crops, whereby their use is critical to ensure the sustainability of the farms global management. However, they can cause serious ecological problems if misused, polluting soils and groundwater. Combining “soft technology” and local materials is a low cost solution in terms of finance and energy. The REAGUA project (REuso AGUA, Water reuse in Spanish) analyzes the possibility of using “picon” (lapilli) as a material for the treatment of liquid manure from ruminants, for later use in subsurface drip irrigation system to produce forage and biofuels, in which the soil acts as a subsequent advanced treatment. A three-phase system, in which the effluent was poured with a vertical subsurface flow in an unsaturated medium, is designed. In order to determine the management conditions that optimize the filter, it was necessary to characterize the hydraulic behavior of lapilli and its ability to remove substances. Using three lapilli-filled columns, unsaturated flux, and a ruminant effluent, the reduction of chemical oxygen demand (COD), biochemical oxygen demand after 5 days (BOD5) and ammonia, phosphorus and suspension solids (SS) obtained was over 80%, 90%, and 95% respectively, assumable values for irrigation. View Full-Text
Keywords: lapilli; slurry; advanced treatment; forage species lapilli; slurry; advanced treatment; forage species
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Falcón-Cardona, N.; Mendoza-Grimón, V.; Fernández-Vera, J.R.; Hernández-Brito, I.; Hernández-Moreno, J.M.; Báez, S.O.P.; Ritter, A.; Palacios-Díaz, M.D.P. Hydraulic Behavior and Chemical Characterization of Lapilli as Material for Natural Filtering of Slurry. Water 2015, 7, 2840-2850.

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