Study and Design of Appropriate Sewage Methods in KMUTT Bang Khun Thian

Abstract

The King Mongkut's University of Technology Thonburi (KMUTT), in the education service area Bang Khun Thian is located near a mangrove forest. As a result, the soil therefore becomes more salinized than usual, which also disturbs the salinity of the local water sources and causes a higher level of salinity in the wastewater in this area. This project aimed to study and design a suitable wastewater treatment method in KMUTT Bang Khun Thian to reduce water salinity until it is safe to use for watering freshwater plants. One of the desalination methods that utilizes the distillation concept is the solar still. When saltwater is placed in a container with a transparent material cover and exposed to direct sunlight, the water will heat up and vaporize. The steam produced will adhere to the covering material and condense into less saline water. Using PVC pipes to construct the prototype's rectangular, trapezoidal shape. As a result, it can reduce salinity by up to 86.24 percent. Because of the slow rate of evaporation, there is still an issue. A small amount of steam escapes from the system and sticks to the plastic where it is not needed, preventing some water droplets from falling down the gutter. The quantity of water received is, therefore, less than expected. The machine will eventually be changed to improve its suitability.