Agua potable y saneamiento ambiental en América Latina, 1981-1990 = Drinking water supply and sanitation in Latin America, 1981-1990

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Coeficiente de operación de un sistema formado por un refrigerador doméstico acoplado a un acumulador de agua caliente para la recuperación de energía

An experimental apparatus containing a domestic refrigerator coupled to a vertical hot water storage tank was used for energy recovery. The original condenser of the refrigerator was maintained, but modified with a concentric tubes heat exchanger with countercurrent water and refrigerating gas flows. The coefficient of performance for the heat pump is calculated by the ratio of energy in the heat storage and the electric power consumed by the domestic refrigerator compressor. The results show that the increasing of hydrostatic pressure in the storage tank increases the water flow rate and the coefficient of performance. The proposed device also reduces the heat dissipation to the surroundings. This is more important in small confinements found in low-cost houses.

América Latina y el Caribe: el manejo de la escasez de agua

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Estimación de indicadores de costo eficiencia en proyectos de agua potable: documento de trabajo

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Manual de identificación, preparación y evaluación de proyectos de agua potable

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Efeitos do extrato de parede de levedura em dieta seca sobre a Microbiologia, ácidos graxos de cadeia curta e redução do odor das fezes de gatos adultos

The aim of this study was to evaluate the effects of yeast cell wall extract (YCW) in dry diet on the fecal microbiota, concentration of short-chain fatty acids (SCFA) and on the odor reduction of cats feces. We used 20 animals of both sexes, randomly assigned to four treatments and five repetitions totaling 20 experimental units: 1) dry commercial diet (control); 2) control + 0.2%, 3) control + 0.4%, and 4) control + 0.6% of YCW in dry matter. Enterobacteriaceae and lactic acid bacteria, fecal concentration of acetic, propionic and butyric acids, ammonia nitrogen and sensory panel were performed. There were no significant differences (p> 0.05) for bacterial counts and the concentration of SCFA and ammonia, but in sensory panel a reduction in the odor of feces could be noted with the use of 0.2% of YCW. We concluded that the addition of up to 0.6% YCW had no effect on the microbiology and the concentration of fatty acids, but there is potential for its use as an additive because of the improvement in the odor of feces. However, further studies are needed to understand the mechanisms of action and the effects of prebiotics for domestic cats.

Los desastres naturales relacionados con el agua = Water-related natural hazards

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Necesidades financieras del Decenio Internacional del Agua Potable y del Saneamiento Ambiental en América Latina = Financial demands of the International Drinking Water Supply and Sanitation Decade in Latin America

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Suministro de servicios de agua potable y saneamiento a la población rural de América Latina = Provision of drinking water and sanitation services to the rural population of Latin America

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Decenio Internacional del Agua Potable y del Saneamiento Ambiental: la situación en América Latina al comenzar el Decenio y las perspectivas para el futuro = International Drinking Water Supply and Sanitation Decade: the situation in Latin America on the eve of the decade and the prospects for the future

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El poblador andino, el agua y el papel del Estado

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Mercado y reforma de la gestión del agua en Perú

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Una opción de financiamiento para la provisión de agua y servicios sanitarios

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Régimen jurídico del agua: la experiencia de Estados Unidos

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La gestión del agua y las cuencas en América Latina

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