International Journal on Advanced Science, Engineering and Information Technology, Vol. 13 (2023) No. 2, pages: 592-598, DOI:10.18517/ijaseit.13.2.16667

Hydrogen Recovery from Electroplating Wastewater Electrocoagulation Treatment

Abstract

The electroplating industry is one of the industries that contribute to liquid waste that can pollute the environment. An increase must also follow the rapid development of the electroplating industry in the wastewater treatment system. The presence of heavy metals such as chromium (Cr) and nickel (Ni) in electroplating wastewater can cause problems for humans and the environment; hence, electroplating wastewater treatment needs to be done. One form of electroplating wastewater treatment is that it can be processed as a material to obtain hydrogen gas (H2) as a new energy source. Electroplating wastewater can be processed into hydrogen gas by the electrocoagulation method using metal electrodes. In this study, the production of hydrogen gas from electroplating wastewater was carried out with a 2 (two)-step process, namely the treatment of electroplating wastewater with an electrocoagulation device and followed by the process of processing electroplating wastewater into hydrogen gas using an oxyhydrogen reactor. In the process of treating electroplating wastewater into hydrogen gas, KOH catalyst is added with varying concentrations, and the electrolysis time is 5 minutes. The purpose of adding a KOH catalyst is to obtain optimum hydrogen gas in the electroplating wastewater treatment process into hydrogen gas. The optimum KOH catalyst concentration for electroplating wastewater treatment into hydrogen gas after 5 minutes is 0.5 M, with a volume of hydrogen gas generated of 2.875 L and H2 content of 554 mg/m3.

Keywords:

Electroplating wastewater; electrocoagulation; hydrogen recovery; treatment

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