Date of Award
Fall 1972
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Civil and Environmental Engineering
First Advisor
Carter, John
Second Advisor
Crandall, Clifford J.
Third Advisor
Zanoni, A. E.
Abstract
Laboratory scale, activated sludge reactors were run during the course of this research. One unit was continuously operated at J5°C and the second at 50°C. The biological units were seeded with raw sewage and fed powdered milk as substrate. The units were batch fed daily and allowed to establish equilibrium conditions. The effect of shock temperature loadings to each unit was performed by placing a sample of the biological culture in a Karburg respirometer which had been adjusted to the shock temperature desired. A record of oxygen usage was kept throughout the length of the Warburg test. Periodic sampling of the Warburg flasks was also employed and the contents sampled for total and soluble COD and volatile suspended solids. Results of the research show that the J5°C control unit was able to tolerate shock temperature decreases of up to l5°C and shock temperature increases up to 10°C without seriously effecting the treatment efficiencies. For a l5°C shock temperature increase biological activity was seriously impaired for approximately 5 hours. The 50°C control unit was effected only mildly by a 5°C shock temperature decrease. The time of organic conversion into cell material remained the same but the rate of oxygen uptake increased. Substantial reduction in the rate of biological metabolism and rate of oxygen uptake was noted when this unit was subjected to shock temperature decreases of l5°C and J0°C.
Recommended Citation
Barry, William F., "Shock Temperature Effects on Thermophilic Activated Sludge" (1972). Master's Theses (1922-2009) Access restricted to Marquette Campus. 3961.
https://epublications.marquette.edu/theses/3961