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2 resultados encontrados para: AUTOR: Rojas Valencia, María Neftalí
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Artículo
*En hemeroteca, SIBE-Tapachula
Implementación y caracterización de un sistema de captación y aprovechamiento de agua de lluvia
Rojas Valencia, María Neftalí (autora) ; Gallardo Bolaños, José Roberto (autor) ; Martínez Coto, Alberto (autor) ;
Disponible en línea
Contenido en: Tip. Revista Especializada en Ciencias Químico-Biológicas Vol. 15, no. 1 (junio 2012), p. 16-23 ISSN: 1405-888X
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
51799-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
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Resumen en: Español | Inglés |
Resumen en español

En este trabajo, se presenta la implementación de un sistema de captación y aprovechamiento de agua de lluvia, para conocer su calidad, se realizaron análisis microbiológicos y fisicoquímicos basados en la normatividad vigente en México. Los resultados microbiológicos mostraron diversos tipos de bacterias como bacillos, cocos y coliformes, entre ellos Escherichia coli y Enterobacter aerogenes, mientras que los fisicoquímicos reportaron concentraciones bajas de Sólidos Suspendidos Totales (8.9 mg/L), Demanda Biológica de Oxígeno (2.7 mg/L), Demanda Química de Oxígeno (6.7 mg/L) y Carbón Orgánico Total (1.9 mg/L). En este trabajo, también se propone la adaptación de un sistema de captación en una edificación ya construida con un tren de tratamiento, el cual debe proporcionar la calidad del agua adecuada para las necesidades actuales

Resumen en inglés

This work relates to the implementation of a rainwater catchment system and its use. To determine rainwater quality, microbiological and physical-chemical analyses based on Mexican standards were conducted. The microbiological results showed various types of bacteria, such as bacilli, cocci and coliforms, among them Escherichia coli and Enterobacter aerogenes, while the physico-chemical results showed low TSS (8.9 mg/L), BOD (2.7 mg/L), COD (6.7 mg/L) and TOC (1.9 mg/L) concentrations. Moreover, a catchment system, with a treatment train supplying water with an adequate quality for the current needs, is proposed


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Resumen en: Inglés |
Resumen en inglés

Mature leachates are a significant cause of soil and water contamination because they contain high organic loads of recalcitrant materials. The application of a physicochemical process is normally insufficient to remove the organic load from these liquids. The objective of the study was to evaluate removal efficiencies in terms of Chemical Oxygen Demand in mature leachates from the Tuxtla Gutierrez landfill applying a physicochemical Coagulation-Flocculation-Fenton system. In the first stage, ferric chloride (FeCl ) and ferrous sulfate (FeSO ) coagulants were used at different doses (2.2, 3 4 2.6 and 2.8 g L-1) and pH values (4, 5 and 6) in a 2 x 3 x 3 experimental arrangement. This effluent was treated in a second stage (Fenton), testing several mass ratios, ranging from 1 to 3, of the oxidant to the catalyst (H O /Fe2+), maintaining the constant catalyst dose (0.434 g L-1 Fe2+). The tests were 2 2 performed unde r a 32 factoria l design a t variou s pH values (2.5, 3.0 and 3.5) and H O doses (300, 550 2 2 and 800 mg L-1). The oxidation and flocculation stages were performed at 135 rpm for 80 min and at 20 rpm for 20 min, respectively. The highest COD removal (66%) in the coagulation-flocculation process was obtained with 2.2 g L-1 of FeCl at pH = 6. With the best treatment Fenton reached 70% 3 COD removal at pH 2.5 and 800 mg L-1 of H O . The tests under this physicochemical system are the 2 2 first application to recalcitrant leachates in Mexico, reaching a 90% overall efficiency and improving the biodegradability index by 64% from 0.14 to 0.23.