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A semi-automatic system for gray water recycling in a residential house located in a metropolitan area is reported in this paper. The purpose is to recover the water used in household cleaning activities (washing clothes, floors, etc.) that are normally sent to the local sewage system, without a treatment. Gray water recycling involves a physical–chemical process (flocculation, coagulation). Nopal mucilage can generate molecular networks and strongly retain large amounts of water. It is an alternative coagulant. The proposed prototype has double filtration and ultraviolet light disinfection. In addition, it has an ON–OFF control. The components of the prototype communicate with the controllers through the MQTT protocol. A star connection topology is used. The system is controlled with an interface within the Node-RED program. Under these conditions, the user can monitor and perform actions on the system. This is done by measuring the pH and turbidity variables. The minimum permissible limits of the Mexican standard NOM-127-SSA1 are considered. Water is obtained, with a minimum of suspended solids for daily activities. However, it is not potable.

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A System for the Recycling of Gray Water Through the Use of Mucilage as a Flocculant

  • 章节

  • 发表日期：

    2025年

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  • Mauricio Aarón Pérez Romero,
  • Luis Héctor Hernández Gómez,
  • Luis Fernando Franco Guzmán,
  • Alejandra Armenta Molina,
  • Armando Josué Piña Díaz,
  • Felipe Escalona Cambray

摘要

A semi-automatic system for gray water recycling in a residential house located in a metropolitan area is reported in this paper. The purpose is to recover the water used in household cleaning activities (washing clothes, floors, etc.) that are normally sent to the local sewage system, without a treatment. Gray water recycling involves a physical–chemical process (flocculation, coagulation). Nopal mucilage can generate molecular networks and strongly retain large amounts of water. It is an alternative coagulant. The proposed prototype has double filtration and ultraviolet light disinfection. In addition, it has an ON–OFF control. The components of the prototype communicate with the controllers through the MQTT protocol. A star connection topology is used. The system is controlled with an interface within the Node-RED program. Under these conditions, the user can monitor and perform actions on the system. This is done by measuring the pH and turbidity variables. The minimum permissible limits of the Mexican standard NOM-127-SSA1 are considered. Water is obtained, with a minimum of suspended solids for daily activities. However, it is not potable.