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KMID : 0896219990190010119
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Journal of Daegu Health College
1999 Volume.19 No. 1 p.119 ~ p.135
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Anaerobic Treatment of Wastewater containing Nitrate by Upflow Process
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Eun Jong-Keug
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Abstract
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This research was investigated with denitrification of wastewater containing nitrate, using upflow anaerobic sludge blanket process. The upflow anaerobic sludge blanket process is also used for both artifical and industrial wastewater. Main ingredients investigated in the artifical and industrial wastewater experiment were the determination of optimum organism/nitrate ratios, nitrate removal efficiency by various hydrogen donor addition. From the experimental results the following conclusions were made： In case of adding methanol, ethanol and sodium acetate as hydrogen donor granular sludge was formed 50days after seeding. Average diameter of granular sludge was 4.8㎜ and settling velocity was 55㎝/min. Production rate of gas was 3.5 L/d in case of adding methanol as hydrogen donor in wastewater containing 150㎎/L nitrate. However adding ethanol and sodium acetate as hydrogen donor, gas production rate were 2.2~2.7 L/d respectively. In case of adding methanol as hydrogen donor treatability of artifical wastewater contained 150㎎/L as nitrate was about 91%. But in addition of ethanol and sodium acetate in wastewater contained 40㎎/L as nitrate, nitrate removal efficiency was 80%.
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