Removal of cypermethrin from cattle bath by using constructed wetland system

• Main Authors: José Luis Marrugo Negrete, José Gregorio Ortega-Ruíz, Amado Enrique Navarro Frómeta, Germán Holland Enamorado Montes, Iván David Urango Cárdenas, José Joaquín Pinedo Hernández, José David Durango Hernández, Arnulfo José Estrada Martínez
• Format: Article
• Language: Spanish
• Published: Corporación Colombiana de Investigación Agropecuaria (Corpoica) 2016-05-01
• Series: Ciencia y Tecnología Agropecuaria
• Subjects: Pest control; Cattle; Pesticide residues; Livestock farms; Water management; Aquatic plants
• Online Access: http://revista.corpoica.org.co/index.php/revista/article/view/489/389

Ectoparasite control in the livestock sector involves the use of chemicals to prevent production losses. In small farms that produce milk in the Córdoba department, the use of the pumping system for the cattle bath is common between farmers. In this work, cypermethrin degradation efficiency was evaluated in three lab-scale subsurface flow constructed wetland planted with Limnocharis flava, Cyperus papyrus and Alpinia purpurata sp., and one unplanted system, all of the beds were gravel based; then, total suspended solids and total phosphorus retention, and elimination of chemical oxygen demand were measured as water quality parameters. The wastewater was pretreated in a descending-ascending slow sand filter, and then was conducted to a wetland continuous flow fed at 7 ml/min. Limnocharis flavabed was higher for the degradation of organic compounds, with 97.9 ± 2.5 % and 69.1 ± 3.7 % for cypermethrin and chemical oxygen demand respectively, with statistically significant differences (p < 0,05) respect to unplanted bed. The higher SST removal were found in the Cyperus papyruswetland, with 62,0 %, however, no differences were observed with the other evaluated planted systems, as opposed these were significantly higher than unplanted wetlands.