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Evaluation of IMETTM Technology for Enhancement of Wastewater Sludge Digestion

Dissanayake, Mevan C.
http://rave.ohiolink.edu/etdc/view?acc_num=ysu1403531914

Abstract Details

2014, Master of Science in Engineering, Youngstown State University, Department of Civil/Environmental and Chemical Engineering.
This study evaluated the IMETTM technology for the enhancement of sludge digestion in comparison to the existing aerobic digesters at the Columbiana WWTP, where the study took place. This evaluation was based on changes in solids and organic matter, and the fate of nutrients, in an IMET pilot plant system. For a study period of eleven weeks, samples were collected from seven different locations in the IMET system, on a weekly basis, and were tested for various parameters included under the study's scope of work. The analysis of data focused on sludge digestion in three process tanks that contained IMET bioreactor modules, and the process of biosolids breakdown in the system's solubilization tank. The results of this study showed decreases of less than 2% of all solids and organic matter parameters in the IMET process tanks, which were considered statistically insignificant by the t-test for paired observations. Weak evidence was shown that the system's venturi and/or ozonation units had some impact on the solubilization of biosludge. Small decreases in nutrient concentrations (< 10.0%) were observed and deemed statistically plausible by the t-test for paired observations, thus, showing signs of biological activity in the IMET process tanks. A comparison between the IMET system and the aerobic digesters, at equivalent detention times, showed a slightly higher reduction of total COD and VSS in the IMET system. This difference was deemed statistically insignificant, after calculating confidence intervals for the mean values of IMET system's outflow concentrations, at confidence levels as low as 20%.
Scott Martin, PhD (Advisor)
Suresh Sharma, PhD (Committee Member)
Douglas Price, PhD (Committee Member)
98 p.
Civil Engineering; Environmental Engineering
Wastewater sludge digestion; Sludge digestion; Submerged attached growth process; IMET; Solubilization of biosolids; Wastewater treatment

Recommended Citations

Citations

  • Dissanayake, M. C. (2014). Evaluation of IMETTM Technology for Enhancement of Wastewater Sludge Digestion [Master's thesis, Youngstown State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1403531914

    APA Style (7th edition)

  • Dissanayake, Mevan. Evaluation of IMETTM Technology for Enhancement of Wastewater Sludge Digestion. 2014. Youngstown State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ysu1403531914.

    MLA Style (8th edition)

  • Dissanayake, Mevan. "Evaluation of IMETTM Technology for Enhancement of Wastewater Sludge Digestion." Master's thesis, Youngstown State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1403531914

    Chicago Manual of Style (17th edition)

ysu1403531914
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© 2014, all rights reserved.
This open access ETD is published by Youngstown State University and OhioLINK.