The Effect of Material Characteristics on the Quality of Hand-crafted Batik Wastewater

Batik Sidomulyo Batu City is one of the hand-crafted batik Small and Medium Enterprises (SMEs) that uses synthetic dyes. The use of dyeing technology in batik making process generates a large amount of wastewater, which can lead a harmful effect to the environment. To date, Batik Sidomulyo SME uses two types of mori cloth material before dyeing process include mori cloth with and without the mordanting process. The mori cloth with mordanting process was soaked in the alum for 24 hours before the grafting process was carried out. The purpose of this study was to analyze the quality of batik wastewater produced based on the characteristics of the treatment of the fabric material before the embedding process was carried out. Wastewater treatment technology uses technology transfer from Mini Wastewater Treatment Plant (WWTP) which utilizes biofilter technology using two treatment compartment including (1) separation of wax content from wastewater and (2) separation of wastewater from toxic and hazardous material waste by mixing with a coagulant. Measurements of pH, BOD, COD, TSS, and oil/fat were carried out before and after the treatment of Mini WWTP. The results showed that the pH of the wastewater generated from the mini WWTP outlet was following the quality standard of 6.86 and the total suspended solids (TSS) value of 90.16 mg/L. Meanwhile, the values of BOD, COD, and oil/fat content have been significantly reduced but still exceeded that of the quality standards, with the value of 90.16, 253.8, and 4.5 mg/L, respectively.