Some hardware and instrumentation aspects of the development of an automation system for Jar Tests in drinking water treatment

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Some hardware and instrumentation aspects of the development of an automation system for Jar Tests in drinking water treatment

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Title: Some hardware and instrumentation aspects of the development of an automation system for Jar Tests in drinking water treatment
Author: Calderón Godoy, Antonio José; González Pérez, Isaías
Abstract: El llamado Jar Test (JT) desempeña un papel vital en los tratamientos de agua potable y aguas residuales para establecer la dosis de floculantes y coagulantes. Esta prueba es un procedimiento instrumental de laboratorio bien probado realizado por personal capacitado. En este trabajo, se presenta un sistema completamente novedoso para la automatización y el monitoreo de una JT dedicada al tratamiento de agua potable. Se ha implementado utilizando un controlador industrial programable y sensores e instrumentos seleccionados específicamente para este propósito. Una vez que se han ingresado los parámetros de la prueba, las etapas que componen la JT (agitación, adición de coagulante, etc.) se realizan secuencialmente sin intervención humana. Además, todas las mediciones involucradas de los sensores se recolectan y hacen accesibles para un monitoreo continuo del proceso. Por medio del sistema propuesto, el procedimiento JT se realiza de forma totalmente automática y puede ser monitoreado local y remotamente en tiempo real. Además, el sistema desarrollado constituye un laboratorio portátil que ofrece características ventajosas como escalabilidad y capacidad de transporte. El sistema propuesto se describe centrándose en los aspectos de hardware e instrumentación, y se informan los resultados exitosos.The so-called Jar Test (JT) plays a vital role in the drinking water and wastewater treatments for establishing the dosage of flocculants and coagulant. This test is a well-proved laboratory instrumental procedure performed by trained personnel. In this work, a completely novel system for the automation and monitoring of a JT devoted to drinking water treatment is presented. It has been implemented using an industrial programmable controller and sensors and instruments specifically selected for this purpose. Once the parameters of the test have been entered, the stages that compose the JT (stirring, coagulant addition, etc.) are sequentially performed without human intervention. Moreover, all the involved measurements from sensors are collected and made accessible for continuous monitoring of the process. By means of the proposed system, the JT procedure is conducted fully automatically and can be locally and remotely monitored in real-time. Furthermore, the developed system constitutes a portable laboratory that offers advantageous features like scalability and transportability. The proposed system is described focusing on hardware and instrumentation aspects, and successful results are reported.
URI: http://hdl.handle.net/10662/9352
Date: 2017


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