Kinerja Metode Elektroflotasi pada Pengolahan Air Limbah Pewarna Tekstil Dispersi

Abstract

Disposal of textile wastewater above the maximum quality standard into the environment will cause many negative impacts on the ecosystem in the environment. The textile industry utilizes about 2/3 of the total dye products. About 10-15% of the use of these dyes is wasted as waste water. Dispersion dyes are a type of synthetic dye that is relatively widely used in the textile industry. Disperse dyes are insoluble in water and have relatively high chemical resistance. One of the suitable methods applied to treat textile dye dispersion wastewater is electroflotation. Electroflotation works on the basic principle of an electrolytic cell. The performance of electroflotation is influenced by several factors, including the difference in electric potential and the length of time for electroflotation. The purpose of this study was to study the effect of electric potential difference and processing time on the performance of the electroflotation method in textile dye dispersion wastewater treatment. In this study, the electroflotation performance was measured based on the ability of the method to reduce the COD (Chemical Oxygen Demand) value and the color level of the treated textile wastewater. In addition, the specific electrical energy requirements and the value of the decrease in dye concentration per unit of electrical energy are also calculated. The results showed that the optimum conditions for electroflotation were achieved by using an electric potential difference of 12 V and an electroflotation time of 60 minutes. Under these conditions, the COD value and color level of textile wastewater can be reduced with separation efficiency of 88.9% and 93.3%, respectively, with a specific electrical energy requirement of 200 kWh/m3. Meanwhile, the decreasing value of dye concentration per kWh of electrical energy based on COD value and color level were 16293.3 ppm/kWh and 23333.3 Pt-Co/kWh, respectively