Yeast using for Color Removal in Wastewater
Jaruwan Chutrtong1, Waradoon Chutrtong2
1Jaruwan Chutrtong, Department of Industrail Microbiology, Suan Sunandha Rajabhat University, Bangkok, Thailand.
2Waradoon Chutrtong, Department of Chemistry, Srinarinwirot University, Bangkok, Thailand.

Manuscript received on 02 April 2019 | Revised Manuscript received on 10 May 2019 | Manuscript published on 30 May 2019 | PP: 2178-2181 | Volume-8 Issue-1, May 2019 | Retrieval Number: A1966058119 /19©BEIESP
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Abstract: Molasses wastewater is waste from alcohol beverage industry which is huge industry. Its properties are high pollution. If released to environments without treatment, it can cause a lot of environmental problems. So, there are varieties methods for molasses wastewater treatment which highly effective in reducing the COD and BOD levels of the residue to the level that does not pose any problem to the environment. However, molasses wastewater contains difficult to remove melanoidin substance which causes dark colors. So the treated water is still dark. If discharged treated water to natural water sources, the water will be darker. The use of microorganisms in wastewater treatment is a costly method and is relatively safe, even take a long time. This research is to study the optimum conditions for microorganism usage to remove dark color from wastewater by biological methods. Three yeasts, Citeromyces siamensis, Issatchenkia orientalis and Saccharomyces cerevisiae, were selected for this study. Conducted the experiment by adding 1-3 % of glucose, sucrose, lactose, yeast extract, peptone and urea in synthetic molasses wastewater to find the appropriate ratio that will promote molasses wastewater color reduction of those yeast species. Cultured at 30 degrees Celsius for 7 days and measure color intensity with spectrophotometer at wavelength 660 nm. It is found that the addition of 1 percent glucose resulted in the best color loss by all three yeasts compared to the addition of sucrose and lactose. It is also found that the addition of 1 percent peptone gave the best color removal efficiency by Citeromyces siamensis and Issatchenkia orientalis compared to the addition of peptone and urea. While Saccharomyces cerevisiae is effective in reducing the color of molasses wastewater when adding yeast extract 1 percent.
Index Terms: Decolorization, Molasses, Wastewater, Yeast.

Scope of the Article: Water Supply and Drainage