International Journal on Advanced Science, Engineering and Information Technology, Vol. 12 (2022) No. 2, pages: 703-711, DOI:10.18517/ijaseit.12.2.12884

Produced Water Treatment using Electrocoagulation Combination Method with Aluminum (Al) and Iron (Fe) Electrodes and Activated Carbon Adsorption Treatment

Putra Anugrah, Muhammad Said, David Bahrin

Abstract

Oil is the main source of energy and income for various countries today, and its production has become one of the most important industrial activities in the 21st century. Besides being produced, the oil and gas industry also has a problem with a large volume of waste, and 80% of the liquid waste produced is water, which is also referred to as produced water. Produced water is a by-product of oil and gas processing. This water is different from water because it contains hazardous chemicals and other elements in oil and gas. In this study, a combination of electrocoagulation processes using aluminum (Al) and iron (Fe) electrodes with filtration treatment using activated carbon from a coconut shell, comparing the performance of three processes: electrocoagulation process and adsorption and combination of the electrocoagulation-adsorption process with a continuous process. Electrocoagulation is a process using designed electric currents such as voltmeter circuits with voltage variations of 3, 6, 9, and 12 V, and time variations of 30, 60, 90, 120, and 150 minutes with Al and Fe electrodes were then carried out by their adsorption process using activated carbon from coconut shell waste. The main advantage of this method is the relatively short contact time, and electrode material is easily obtained, and this method is proposed as a substitute for a coagulation system with alum/alum material. The results showed that the decrease in the optimum decrease in COD (98.39%) from the initial content of 737.57 mg/L to 11.90 mg/L, TDS (93.54%) from the initial content of 16,610 mg/L to 1,073 mg/L ammonia (75.16%) from the initial content of 24.24 mg/ L to 6.02 mg/L, oil content (97.56%) from the initial content of 364.2 mg/L to 8.9 mg/L, and phenol (92.5%) from the initial content of 1.20 to 0.09 mg/L. With the optimum voltage parameters at 12 V and a time of 150 minutes. The result achieved in this process is the combination of electrocoagulation and adsorption obtained at 12 V for 150 minutes able to reduce the produced water so that it meets the quality standard by the regulation of the state minister of the environment concerning wastewater quality raw for businesses or oil and gas as well as geothermal activities.

Keywords:

Electrocoagulation; adsorption; produced water.

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