Seed yeast cultivation for salad oil manufacturing wastewater treatment |
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Authors: | Zheng Shao-kui Yang Min Li Pei-rui |
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Institution: | 1. State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China. 2. Faculty of Life Sciences, Henan Normal University, Henan 453002, China |
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Abstract: | The mixture of five yeast strains obtained from soil could remove about 85% TOC of oil-rich wastewater in batch test. While the highest MLSS was obtained at an N:C of 1:5, the oil removal decreased with the increase of N:C during yeast sludge cultivation. Ammonium chloride was the best nitrogen source for yeast cultivation from the viewpoint of yeast growth and oil utilization. An ammonia concentration of over 1300 mg/L led to mass death of yeast at a pH of 5. The ammonia concentration should be controlled at a level of 1000 mg/L or lower. |
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Keywords: | yeast seed sludge cultivation nutrient ammonia toxicity wastewater treatment |
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