STUDY OF WASTEWATER TREATMENT OF WATER USED FROM JEANS WASHING BY USING BIOLOGICAL METHODATIEK MOESRIATI AND LAILY KUSUMA WARDANI
Jeans industry has chosen relocation to developing countries as a preferred way of reducing production cost. Jeans washing industry prepare jeans before its ready to be colored. The produced wastewater from its operation contain high concentration of COD, BOS, TSS, oil and grease, which flowed to the river without any treatment. Therefore, 3 pilot scale anaerobic biofilters were built to remove COD, TSS, and color as the highest pollutant. The reactor was designed to treat 24 liter of wastewater with HRT of 8 hours. The reactor consist of inlet tank, filter units, and outflow tank. Before the wastewater reach filter units, it aerated with 7 L/minute air. Filter media variation used for this research was roof fragment, bioball, and gravel stone with porosity 0,83; 0,92; and 0,4; respectively. The main parameter of organic pollutant analyzed were Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and decoloring. All reactor can remove approximately above 50% of COD, 60% of TSS, and 25% of color in the initial day of reactor operation. At the optimum rate, biofilter with bioball media can degrade up to 91,67% of COD, 88,89% of TSS, and 82,66% of color, which made it as the best filter media to treat jeans washing wastewater.
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