The development of membrane technology as a waste treatment unit is currently very rapidly and widely used in the separation process, such as batik waste (rhodamine B). The purpose of this research is to make a composite membrane of cellulose acetate derived from banana peel fermentation with polystyrene and determine its application in waste separation process of batik waste (rhodamine B). The method of making the membrane is phase inversion, i.e the process of a polymer modified in a controlled manner from liquid phase to solid phase. This research begins with manufacturing of cellulose (nata de banana skin) through fermentation by Acetobacter xylinum. The second stage is acetylation process of cellulose into cellulose acetate. The next stage is manufacturing composite membranes CA-PS and its application in batik waste (rhodamine B) separation process with the application on "dead-end" reactor. Characterization of CA-PS composite membrane has been done with the determination of flux, rejection coefficient, tensile strength and strain as well as the morphology and pore size of the membrane using SEM. The measurement results obtained the water flux are of 4.3889 L / (m2.h) and sample flux are 1.4629 L / (m2.h), rejection coefficient are 16%, tensile test are 10.38 MPa, and the average pore size are 5.114 µm.
Key words: cellulose acetate, nata, rhodamine B, CA-PS, dead-end
