Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


Sulfides from Kraft mills and other processes are an odor problem. Using Thiobacillus thiooxidans as bacteria to be inoculated into an aerobic biological reactor can be an alternative to reducing the quantity and improving the quality of effluent gases. Approximately, two to three months was needed to insure that the Thiobacillus thiooxidans were growing in chains and colonies. So, this thesis was not fully completed due to the fact that the bacteria did not have enough time to grow. No conclusion can be made on the feasibility of using an aerobic biological reactor with an inert packing to degrade or eliminate odorous gases such as hydrogen sulfides. The Kitagawa Precision tubes proved to a be a good and easy method for analyzing the concentration of hydrogen sulfides (inlet or exit).