Analysis of Multimedia Filter Effectiveness to Improve the Quality of Rainwater Runoff in Fulfilling Urban Raw Water Supply Arma Oktaviani (*a), Nyoman Suwartha (a)
a) Department of Civil Engineering, University of Indonesia, Depok City, 16424, Indonesia
*arma.oktaviani[at]ui.ac.id
Abstract
Rainwater is recommended as drinking water because it does not have deficiencies in several parameters. However, based on preliminary data test results in the study area has several parameters that exceed sanitary hygiene water. Multimedia filters are proposed to improve the effluent quality of rainwater runoff. The combination of silica sand added with activated carbon and zeolite media was varied into three reactor thickness designs as the first experiment and the difference in hydraulic loading rate (HLR) as a second experiment on a pilot-scale of 1:2. Based on the first experimental results, it was found that the reactor thickness variation factor did not have a significant effect (p-value 0.615) on improving effluent quality. However, the use of proposed media had a significant effect (p-value ~ 0) on several parameters. Effluent quality improvement reached 100% in nitrites, 29% in nitrates, and 94.4% in total coliform. Then, based on the second experiment results, variations in HLR did not have a significant effect (p-value 0.769) on improving effluent quality. However, HLR variation gave a significant effect (p-value of 0.001) on several parameters. Effluent quality improvement reached 71.4% in nitrites, 100% in nitrates, and 91.9% in total coliform.
