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Tratamiento de lactosuero ácido en un reactor UASB a diferentes cargas constantes y puntuales

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Date

2013

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Publisher

Corporación Universitaria Lasallista
Área Metropolitana del Valle de Aburrá

Abstract

Intro duction. For this research work, the acid whey produced by Oaxaca cheese industry in a UASB reactor was used. The reactor was subjected to three constant charges and three punctual charges of the whey. The reactor had a nominal capacity of 2.9 L with 1.9 days of hydraulic retention with an upward flow and a sludge blanket of 40% of the reactor´s volume. Objective. Evaluate the behavior of the UASB reactor with three di-fferent charges of whey. materials and methods. Three different constant charges of whey were used (5200, 7800 and 10500 mg CDO/L each one) during 22 days, and punctual charges of 32000, 47000 and 65000 mg DQO/L per day of whey, for each one, during 24 hours. Both the influent and the effluent were determined: total of sugars, volatile fatty acids (VFA´s) protein, pH, methane and CDO. Results. The findings demonstrated that in the constant charges used the removal efficiency of CDO was 26 %, and for the punctual charges was 57 %. The sugar degradation efficiency was 95% for the constant and the punctual charges. For the protein, the removal efficiencies in the constant charges were above 27 % and for the punctual charges the efficiency was 46 %. Conclusion. The values of volatile fatty acids and methane were all within the limits for a good functioning of the reactor. Nevertheless, the pH had acid values below the ones recommended.

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Keywords

Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Lactosuero, Industria láctea, Digestión anaerobia

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