Efficiency Assessment of Batik Industry Wastewater Treatment Plant in Center for Handicraft and Batik Indonesia

摘要

Batik as Indonesian cultural heritage has gained growing interest from international customers as well as local ones. However, the increasing production is also followed by negative impacts to environment in the form of wastewater. Most of batik industries dispose their wastewater directly into the environment without prior treatment. Therefore, it is necessary to build a wastewater treatment plant (WWTP) as a pilot project for the industries. This paper is focused on efficiency evaluation of the wastewater treatment process for batik industry WWTP at the Center for Handicraft and Batik which can serve as a model for small scales industries. Wastewater samples were taken from each treatment unit outlets. Eleven parameters were analyzed from the samples: pH, temperature, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total dissolved solids (TDS), phenol, total chrome, total ammonia (NH3-N), sulphides (S), and oil and grease. Treatment efficiency was calculated for all parameters and the effluent analysis results were compared with permissible maximum values as stated in Local Regulation of Special Region of Yogyakarta No. 7 of 2016 on Wastewater Discharged Standards. The results indicate that each treatment process could reduce the concentration of the pollutants. The overall value final effluent was below the standard so the effluent could be discharged safely to the environment.