Detergent Concentrate and Carwash Water Residue Purity Using Charcoal, Rock, and Sand as Filter

Carwash industries emerge in many area as a result of vehicle ownership. Aside from having the advantage economically, carwash industry also causes many problems such as land and water pollution that resulted from the carwash’s soap waste. This research aimed to create a simple container to filter the waste so the water output could meet the waste water quality standard. Soap contains detergent that if not managed properly, could cause pollution inside the earth surface and/or the river that are used to discard the carwash waste. The method of this research is to create a prototype and test using the multi-tiered filter that are using charcoal combination (wood and coconut shell), rock (river rock and mountain rock) and sand. One of the parameter that are used in this research is detergent concentration and purity of the filtered water. The result of the filtering process using the prototype device showed that the detergent concentration is still higher than 0,5 mg/L, however, the display of the filtered water itself that are using coconut shell looked clear, while the result that are using the wooden charcoal still looked opaqued or still the same with the sample in the beginning (before being filtered using the device).