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URN etd-0728104-155339 Statistics This thesis had been viewed 3211 times. Download 1752 times. Author Ching-Long Lei Author's Email Address email@example.com Department Bioengineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 103 Title STUDIES ON DENITRIFICATION OF MILITARY EXPLOSIVE (LEAD AZIDE) PRODUCE
Keyword Vorticalla convalleria Anaerobic sludge Denitrification Lead azide pH value Temperature Temperature pH value Lead azide Denitrification Anaerobic sludge Vorticalla convalleria Abstract Abstract
To effectively remove nitrate-N from the wastewater of lead azide processing plant, a bio-denitrification process was studies. The anaerobic sludge was provided from the President Food Company, which had been culture 15-day for activation. The major bacteria of the activate sludge were identified to be Vorticalla convalleria and Aspidiacs spp., both were considered as responding to denitrification of high nitrate-N of lead azide wastewater. In this study, two major factors ( pH and temperature) related to denitrification rate were discussed. We set three temperatures( 20℃, 25℃, and 30℃) with five pH values ( 6.5, 7, 7.5, 8, and 8.5) to investigate the optimal denitrification conditions. In the process of denitrification with the activated sludge, ethanol was added as carbon source and electron donor. The results revealed that the denitrification optimal pH and temperature was at pH 7.5 and 30℃.Under the optimal conditions, used a miniaturized fermented for continuous reaction for 96 h, the content of nitrate-N was decreased from 3500 ppm to 240 ppm. This meant about 90﹪denitrification rate could be obtained.
Keyword: Anaerobic sludge, Vorticalla convalleria, Denitrification,
Lead azide, pH value, Temperature
Advisor Committee Tsong-Rong Yan - advisor
none - co-chair
Files Date of Defense 2004-06-24 Date of Submission 2004-07-28