Aprovechamiento de estiércol vacuno y pasto seco en la vermiestabilización de lodos residuales de la PTAR (planta de tratamiento de aguas residuales) Magollo
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Rev. Cien. Tec. In.
Abstract
El tratamiento de aguas residuales en la Planta de Tratamiento de Magollo genera considerables cantidades de lodos residuales, mismos que carecen de un tratamiento eficiente y una disposición final adecuada, significando una grave problemática ambiental para la región de Tacna, Perú. Ante esto, nace la importancia de buscar alternativas sostenibles y económicas que puedan hacerle frente. La vermiestabilización consiste en el uso de lombrices californianas (Eisenia foetida) para el tratamiento de lodos residuales coadyuvada por otros materiales orgánicos. El presente estudio tiene como objetivo aprovechar estiércol vacuno y pasto seco para vermiestabilizar los lodos residuales de la Planta de Tratamiento de Aguas Residulaes de Magollo, Tacna - Perú. Se aplicó un diseño factorial multinivel 4 x 2 con tres repeticiones. Se establecieron diversas cantidades de estiércol y de pasto, en tanto la cantidad de lodos residuales y de E. foetida se mantuvo constante en todos los tratamientos. Se analizó el pH y la conductividad eléctrica (CE) de los sustratos. Los resultados indicaron que a mayor cantidad de material orgánico, se obtuvo un incremento en el pH y conductividad eléctrica. Se determinó que el tratamiento 8 (1 kg de estiércol y 0,5 kg de pasto seco) tuvo un mayor índice de germinación al 5 % de extractos de lodo igual al 89,90 %, demostrando que la vermiestabilización es una técnica efectiva en el tratamiento de lodos residuales y la disminución en su toxicidad.
The wastewater treatment at the Magollo Treatment Plant generates considerable amounts of residual sludge, which lack efficient treatment and adequate final disposal. In fact, this means a serious environmental problem for Tacna region, Peru. With all this in mind, there is the need of seeking sustainable and economic alternatives that can cope with it. Vermistabilization consists of using Californian earthworms (Eisenia foetida) for residual sludge treatment, aided by other organic materials. This paper aims at taking advantage of cattle manure and dry grass to vermistabilize the residual sludge from the Magollo Wastewater Treatment Plant, Tacna - Peru. This study applied a 4 x 2 multilevel factorial design with three repetitions, and established several amounts of manure and grass, while the amount of sewage sludge and E. foetida remained constant in all treatments. This study also involves an analysis on the pH and electrical conductivity (EC) of substrates. The results showed that the more amount of organic material, the more increase obtained in pH and electrical conductivity. It was determined that treatment 8 (1 kg of manure and 0.5 kg of dry grass) had a higher germination rate at 5% of mud extracts equal to 89.90%, showing that vermistabilization is an effective technique for residual sludge treatment and reduction in its toxicity.
The wastewater treatment at the Magollo Treatment Plant generates considerable amounts of residual sludge, which lack efficient treatment and adequate final disposal. In fact, this means a serious environmental problem for Tacna region, Peru. With all this in mind, there is the need of seeking sustainable and economic alternatives that can cope with it. Vermistabilization consists of using Californian earthworms (Eisenia foetida) for residual sludge treatment, aided by other organic materials. This paper aims at taking advantage of cattle manure and dry grass to vermistabilize the residual sludge from the Magollo Wastewater Treatment Plant, Tacna - Peru. This study applied a 4 x 2 multilevel factorial design with three repetitions, and established several amounts of manure and grass, while the amount of sewage sludge and E. foetida remained constant in all treatments. This study also involves an analysis on the pH and electrical conductivity (EC) of substrates. The results showed that the more amount of organic material, the more increase obtained in pH and electrical conductivity. It was determined that treatment 8 (1 kg of manure and 0.5 kg of dry grass) had a higher germination rate at 5% of mud extracts equal to 89.90%, showing that vermistabilization is an effective technique for residual sludge treatment and reduction in its toxicity.
Description
Vol. 20, No. 26