Performance of electrocoagulation process for batik-modified sasirangan textiles wastewater using aluminum electrode waste from furniture industry (Al6061-T6 type).

In the home industry of textiles, called batik-modified Sasirangan textiles, wastewater was treated by an electrocoagulation process. The electrocoagulation process occurred by using aluminum electrodes (Al6061-T6) from the waste of the aluminum industry. The effect of parameters such as reaction time (5, 10 15, 30, 45, 60, 90, and 120 min), current density (3.5, 4.5, and 5.5 mA/cm2), and the distance between the electrodes (2, 3, 4 and 5 cm) was evaluated to determine the optimum condition for color, turbidity, and total suspended solid (TSS) removal. Batch experiments at room temperature were carried out at an initial pH of 4 with monopolar electrodes connected in parallel with the DC power supply. The optimum condition was selected at a time of 15 min, 5.5 mA/cm2 of current density, and 2 cm of electrode distances. Under those conditions around 89.5% of color, 87.1% of turbidity, and 71.9% of TSS removal efficiencies were achieved. The electrocoagulation reaction followed the first and second-order reaction kinetics in color intensity and TSS removal. It was also demonstrated that reusing the treated Batik-modified Sasirangan textiles wastewater for the next process production does not harm the quality of the product. Thus, it is possible to implement a continuous electrocoagulation process for reducing the consumption of water in batik-modified Sasirangan textiles industry processes in South Kalimantan, Indonesia. [ABSTRACT FROM AUTHOR]