DEVELOPMENT OF BULK-MODULUS MEASUREMENT APPARATUS FOR CHARACTERIZING MECHANICAL PROPERTIES OF NON-DARCY MEMBRANE

• Main Author: Achmad Syarofi, Ismu
• Format: Final Project
• Language: Indonesia
• Subjects: Fisika
• Online Access: https://digilib.itb.ac.id/gdl/view/47480
• Institution: Institut Teknologi Bandung

Water is one of the natural resources that has a very important function for the life of the entire world, including humans. However, the effectiveness in the use of water is still lacking because of the lack of clean water that is needed requires small (micro) and large (micro) impurities using membranes as the filtration medium. Darcy's law explains the relationship between the discharge rate and the fluid passing through the porous media caused by changes in pressure. To find out the membrane can be used for the filtration process, a filter test using fluid (water) that carried out. Some types of membranes such as glass microfiber membranes show an interesting phenomenon where compilation is carried out on these tests, not fulfilling the Darcy equation. It happens because of the fiber permeability factor in this type of membrane that changes due to changes in pressure must be approached by the non-Darcy equation. To test the pressure change factor, a measuring instrument was made that can change the pressure of the bulk membrane modulus with an atomized system with a high level of accuracy. Calibration of the system that has been made shows good results with a linear regression value (R2) of more than 0.95 in the process of conversion from position (step) to position (?m). The system consists of digital scales based on load cell sensors with micrometers as a medium for compressing automated membranes using a 28BYJ-48 stepper motor with ULN2003APG driver. In testing this system, variations in the type of membrane used are Whatman membrane (GF / F, GF / B) and filter membrane (MFIHPF, MFPN, IPF), as well as variations in the membrane suppressor cross-sectional area.. The results obtained on the test membrane are displayed in a graph. From the resulting graph we can also see the mechanical properties of the tested membrane.