UNS Conference Portal, The 1st International Conference on Science, Mathematics, Environment and Education 2017

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INFLUENCE OF MIXING AND DETENTION TIME IN ELECTROCOAGULATION PROCESS TO TREAT RAW WATER AT BADAK SINGA WATER TREATMENT PLANT
hary pradiko, evi afiatun

Last modified: 2017-07-04

Abstract


Source of raw water used at Badak Singa Water Treatment Plant come from surface water that is Cikapundung River and Cisangkuy River. This source of raw water is affected by conditions in the upstream, pollution along the stream, climate and weather, which cause the change of surface water quality thus requires treatment so that it can be used. Turbidity is one of the contaminants which become the major concern because it often exceeds the quality standards. In the drinking water supply system, turbidity is one important factor for several reasons such as aesthetic factor, burden to filtration, and interfere the desinfection process. Electrocoagulation is one of water treatment method that combines the process of coagulation, flotation, and electrochemical. This research aims to see at the ability of the electrocoagulation process in reducing turbidity as an alternative to substitute the conventional coagulation system such as affixing Poly Aluminium Chloride (PAC). This research carried out by testing electrocoagulation with variations in mixing, current density produced by voltage 10, 20 and 30 volt and detention time 5, 10, 20 and 30 minute to reduce the initial turbudity of 100 NTU. The result are that: the efficiency of electrocoagulation with mixing is better than electrocoagulation without mixing to reduce the initial turbidity of 100 NTU; the final turbidity value of the processing result is better as the length of detention time used and meet the quality standard from detention time of 10 minute; the higher the current density given and the longer the detention time used, the higher the processing efficiency and the formed floc volume is deposited.