Application of Waste Water Treatment Technology from Jewelry Electroplating Process Using Electro-coagulation Method
Suparni Setyowati Rahayu, Dewi Wahyuningtyas

Institut Sains & Teknologi AKPRIND Yogyakarta

Abstract

Production process in small jewelry industry releases waste water from without any pre-treatment. It contains plating from Nickel divalent as much as 74,467 mg/l, which is more that the electroplated waste water quality limit of 0,5 mg/l for Nickel concentration. In addition Nickel is categorized as toxic and dangerous waste substances. This research is aimed at studying the fundamental characteristics of Nickel separated from electroplated waste water in jewelry industrials by means of electro- Coagulation. To get a comprehensive understanding of process characteristics, two intrinsic parameters are the focus of this research. This include electro-chemistry installed voltage and current gain and psycho-chemistry-fluid process time and contaminant concentration. It also a characteristic study of separation process by varying both electro- chemistry and psycho-chemistry-fluid parameters, whilst developing a characteristic model Nickel separation. The research method involved designing assembly and fabrication of an electro-coagulation unit in the laboratory scale. Those research stages provided measured contributions that resulted in a prototype of a compact and modular electrocoagulation device. This was designed with seven pairs of aluminum electrodes that capable of separating nickel with a gain of 84.28%.

Keywords: electro-coagulation, electroplating, jewelry industry, waste water treatment

Topic: Environmental, disaster management and mitigation