#TITLE_ALTERNATIVE#

• Main Author: LARASATI ( NIM 15309087 ), AMANDA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21003
• Institution: Institut Teknologi Bandung

Iron and manganese can be found easily in shallow groundwater. One of the most convenient technologies to eliminate iron and manganese is aeration method. Therefore, an instrument that can be used for the method is air bubble reactor. Expected iron (II) and manganese (II) in the dissolved phase can be oxidized by oxygen to precipitate iron and manganese oxides that can then be removed by filtration methods. This study aims to determine the optimum operation conditions of the air bubble reactor to oxidize iron and manganese, such as knowing the optimum of reactor height, optimum aeration time, and the efficiency of iron and manganese removal. The research was conducted in batches with initial total iron concentration of 3 mg / l and initial manganese concentration 1 mg / l based on the concentrations commonly found in shallow groundwater wells in Bandung. Variations that done are variation in the water level in the reactor; 60 cm, 120 cm, 180 cm, and 240 cm, and the variance of aeration time; 0, 10, 20, 30, 45, 60, 90, and 120 minutes. The results showed that the removal efficiency was greatest when the water level in the reactor was 180 cm, iron removal efficiency of 49-68% and the manganese removal efficiency was about 57-82%. The optimum aeration time about 10-40 minutes, after that time, removal efficiency showed no significant improvement. By pH variations, found that increasing the pH of the water, the iron and manganese removal efficiency also increased. Iron removal efficiency for water sample taken from well is 85% and the manganese removal efficiency is 27%.