Penggunaan Aerasi Venturi Dalam Menurunkan Kadar Besi (Fe) dan Mangan (Mn) pada Pengolahan Air Sumur

Intan Maria Novia Dorty Hulu; Euis Nurul Hidayah

Authors

Intan Maria Novia Dorty Hulu Universitas Pembangunan Nasional “Veteran” Jawa Timur Author
Euis Nurul Hidayah Universitas Pembangunan Nasional “Veteran” Jawa Timur Author

Keywords:

Difusi oksigen, aerasi venturi, air tanah, besi, mangan, oksigen terlarut

Abstract

The increase in oxygen diffusion in water is carried out to sustain the life of organisms present in the water. Moreover, the enhancement of oxygen diffusion can be used as an alternative to reduce iron and manganese levels found in water. This study aims to test the effect of varying the number of air holes in a venturi aerator on increasing dissolved oxygen in water to see if it can influence the decrease in iron and manganese parameters. The diameter of the air holes used is 12 mm, with variations in the number of aeration holes being 1, 2, and 3 aeration holes. The results showed that the more air holes there were, the higher the dissolved oxygen in the water. The highest increase in dissolved oxygen occurred with aeration using 3 venturi holes, reaching 9.2 mg/L after 60 minutes. The greatest reduction in iron content occurred during aeration using 3 venturi holes, which amounted to 100%, caused by an initial concentration that was relatively low at 0.7182 mg/L, decreasing to 0.0088 mg/L at the 60th minute. The reduction of manganese content during aeration using 3 venturi air holes was 67%, with an initial value of 0.3022 mg/L decreasing to 0.0997 mg/L at the 60th minute. It is more difficult to reduce manganese levels in the aeration process compared to iron. Therefore, if manganese reduction is desired, additional processes beyond aeration are required.

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