PROSES FOTOKATALISIS UNTUK PENYISIHAN E.coli DENGAN KOMBINASI TiO2,KARBON AKTIF DAN SINAR UV

One of bacteria which the most found in drinking water is E.coli as pathogenic bacteria. Contamination of ground water occurs because of pathogenic bacteria. Close distance between ground water and surface water or septic tank made contamination of ground water. E.coli bacteria had to remove from ground water, so that the people deserved ground water as drinking water. This research aimed to design reactor to remove E. Coli bacteria. The processes were photolysis process and phothocatalysis process. Both of them in a Fixed Bed Reactor used for removal of E.coli bacteria. Photolysis process in Fixed Bed Reactor using a 10 watt ultra violet lamp. Photocatalysis is process using to combine TiO2powder as catalyst with variation of the concentration of 10 g / L, and 20 g / L on screen and activated carbon as buffer media. Catalyst preparation by mixing the activated carbon and TiO2coating on the screen was performed before contact in the reactor. Photolysis process and the photocatalysis process was done by detention time 20,40,60 and 90 minutes. Analysis of the data used the correlation between the removal of E.coli with the process of photolysis and combination photocatalysis process. Removal E. coli reached 100% within 60 minutes and 90 minutes on the photocatalysis process by screen buffer. While the photocatalysis process by activated carbon media, removal E. coli reached 100% allowance on detention time of 90 minutes. Key words :Photolysis, photocatalysis, E.coli, TiO2, acti