Analysis of modification sedimentation process at communal scale water treatment with electrocoagulation technique

Abstract

One of the main sources of drinking water commonly used as raw water is river water. This study aims to analyze the efficiency of the Water Treatment Plant using electrocoagulation techniques with modification of sedimentation unit to reduce turbidity concentration in raw water. The drinking water treatment methods without chemicals such as electrocoagulation is an alternative that is being developed as a more efficient alternative treatment. This study was conducted by testing the sample water into a Communal Scale Drinking Water Treatment Plant, with variants of aluminium pairs plates, voltages, and the addition of plate settlers to the sedimentation unit. This study was conducted at flow rates of 0.06 L/sec and 0.08 L/sec. This research results show that the optimal variation with initial turbidity of 100 NTU is 5 pairs of plates with 15 Volt electricity with a percentage of turbidity removal of 93.5% at a flowrate of 0.06 L/sec and 88.2 % at 0.08 L/sec flowrates. Under the optimal conditions, the turbidity removal is increasing in line with the increase of turbidity removal in sedimentation units. This condition shows that modification of the sedimentation process by adding plate settlers increase the turbidity removal.