VARIASI KETEBALAN MEDIA FILTER BIO CERAMIC BALL UNTUK MENURUNKAN TOTAL COLIFORM PADA AIR MINUM

Abstract

Drinking water is one of the most important things for humans, so it must be in accordance with established regulations. The drinking water in the canteen of PT. X is processed only by cooking until it boils. The results of the bacteriological quality inspection do not meet the requirements for the Coliform parameter of 119 APM/100 ml according to the Regulation of the Minister of Health of the Republic of Indonesia No. 492 of 2010 concerning Drinking Water Quality. The source of water comes from drilled wells. The borehole is < 10 meters from the source of pollution. There is a need for additional processing with a filtration method using a Bio Ceramic Ball Filter to reduce the total Coliform value. The purpose of this study was to determine the effectiveness of the thickness variation of the bio ceramic ball filter on total Coliform reduction with variations in thickness of 25 cm, 30 cm, and 35 cm. This type of research is experimental research with a pretest-posttest design without control. The sample size is 36 samples with the need for drinking water for examination as much as 3.6 liters. The test was carried out using the one-way anova test because the research data was normally distributed. The average decrease in the total Coliform value at a thickness variation of 25 cm is 104 APM/100 ml, a thickness variation of 30 cm is 112 APM/100 ml, and a thickness variation of 35 cm is 116 APM/100 ml. This shows the most effective research results in reducing total Coliform Bacteria is the thickness of the Bio Ceramic Ball filter 35 cm which reaches 99.02%. The thickness can be increased so that the results are better.