Pollution Load Assessment Of Batik Industry Wastewater Using Key Water Quality Parameters

Abstract

The batik industry is one of the leading creative economy sectors in Indonesia that contributes significantly to the regional economy. However, the production process produces large amounts of liquid waste containing synthetic dyes, salts, surfactants, oxidizing agents, as well as alkaline and organic chemicals such as costic soda, sodium silicate, and wax. The purpose of the study was to analyze the quality of liquid waste in the batik industry based on Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and Total Dissolved Solid (TDS) test data on seven samples (A-G) produced by the batik industry in Yogyakarta. The BOD test is carried out with the SNI 6989.72:2009 test method, the COD test is carried out with the SNI 6989.73:2019 test method, the TSS test is carried out with the SNI 6989.3:2019 test method, and the TDS test is carried out with the SNI 6989.27:2019 test method. The results showed that some samples (especially samples D and C) had a very high pollutant load that required multistage processing such as neutralization/pretreatment, coagulation-flocculation, advanced oxidation processes (AOPs) or a combination of biological and adsorption.