ACTIVE BACTERIA CONSORTIUM IDENTIFICATION AND ITS USING OPTIMIZATION IN PAINTING WASTEWATER TREATMENT

• Main Author: Amalia Shafdar, Amrini
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/35031
• Institution: Institut Teknologi Bandung

Waste treatment in an industry other than has an objective in reducing the risk of environmental pollution can also be used as an attempt to apply the clean technology process by reusing the waste. One of many industries that has applied the attempt is manufacture industry, or in this case X company, which reusing water from the painting process. The reused water is discharged from the painting wastewater treatment with the microbiology method. The method that has been used is activated sludge which applied to treat the wastewater by using bacterial consortium as a degrader. Consortium that has been added should be suitable and appropriate thus the treatment will be optimal. Therefore, the objectives of this research were to optimize the using of active bacteria consortium through the combination of bacteria composition and bacteria spesies variation due to used paint. In this research, consortium bacteria that has been used in the activated sludge were taken from five tanks consisted of five dominant bacterial species. There were four types of paint that has been used to this application: C/T U/C silver, Axis Grey, Phantom Silver, and Deep Black Gloss. The optimum variation could be obtained by the combination between consortium and paint. Effectivity of consortium combination is based on the ratio of dissolved COD (Chemical Oxygen Demand) and bacterial VSS (Volatile Suspended Solid) as known as COD/VSSb ratio. Bacteria identification and the elimination of heavy metals performance is then being conducted after composition test is done. The result showed that the optimum variation of CT/UC Silver paint with the composition of tank 1 : tank 2 : tank 3 : tank 4 : tank 5 was 10%, 20%, 10%, 10%, 50% respectively, while the optimum combination for Axis Grey paint was 20%, 30%, 20%, 10%, 20%, for Phantom Silver paint was 10%, 50%, 10%, 10%, 20%, and for Deep Black Gloss paint was 20%, 20%, 20%, 10%, 30%. Besides, the COD/VSSb ratio value in successive of each application were 21.65; 23.03; 16.68; and 24.04. The identified bacteria species after the composition test were Bacillus licheneformis, Bacillus megaterium, Bacillus cereus, and Bacillus subtilis. While the most optimum efficiency of heavy metals elimination was 63.76% for Zn metal in Axis Grey paint and for the Ni elimination was 78.42% for Ni metal in C/T U/C Silver.