Lecturer University Eleven March (UNS) in Solo, Central Java, has invented a mobile batik wastewater treatment. The unit is a simple tool called Electrochemical Reactor Wastewater Treatment (UPAL RE).
UPAL RE is the result of research since 2009, which deliberately made mobile or can be taken anywhere for easy reach batik artisans located in the township.
Chairman of the Research Faculty of Engineering UNS, Budi Utomo expect with such a device, a former water-colored batik washing process and contains several natural and synthetic dyes can be decomposed into more clear.
“The result could be more clear because the color has been separated substance, other than that the content of COD (Chemical Oxygen Demand) is also reduced. Hopefully batik waste water discharged into the river, can meet the environmental quality standards,” said Budi told reporters in UNS Solo on Tuesday ( 15/1).
The tool is in the form of a tub that can accommodate about 250 liters of waste water. Water bath is equipped with a metal plate arrangement consisting of aluminum and iron. Later plate serves as the cathode or negative flows while aluminum serves as the anode or positive current.
“We also need a 220 Volt AC power source which we converted into DC 15 Volt by using an adapter. Function is to assist chemical reactions that are passed in an electrolyte solution,” he continued.
Budi explained, if the waste water is inserted into the tub, it will appear or flog bubbles that float to the top. The bubble is able to bind the dye contained in the waste water batik in between 30 to 40 minutes.
According to Budi, the institute has conducted experiments in Kampung Batik Solo Kauman. The results COD content of wastewater treated batik using UPAL RE is able to be reduced to 95 percent in batik using natural dyes. While on trial for batik using synthetic dyes capable of minus 85 percent.
“With these tools, the actual COD of the treated wastewater reaches 22 mg / liter or still under water quality standards that may be discharged into the river up to 150 mg / l. Meanwhile dyes we were able to reduce from 339 to 70 PtCo PtCo , “he said.