Miller, Charles Justin
(2004)
Biological Nitrification within the fouling layer of Cross-Flow Micro-Filtration.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
With the fouling layer being established in most membrane filtration applications, a study of the possible benefits of the fouling layer was researched. This investigation was aimed at the determination of a viable nitrifying biofilm within the fouling layer of membrane filtration which could oxidize ammonia. The membrane used was a 0.2 µm ceramic tubular membrane used in cross-flow operation. Nitrifying organisms were inoculated into a bench top filtration apparatus to oxidize ammonia and the corresponding rates of ammonia oxidation were determined in two different operating modes. A "filtering mode" included the process of membrane filtration by enabling filtration and "a non-filtering mode" established the ammonia oxidation rate occurring in the apparatus without the process of filtration. The comparison of the two modes showed a significant increase in the oxidation rate of the filtering mode. The ammonia oxidation rates seen in the six experimental runs corresponding to the surface of the membrane were: 0.94, 2.38, 3.81, 3.14, 6.24, and 9.30 (mg/l-hr-m2) compared to the internal surface of the bench top apparatus which were: 0.12, 0.12, 0.12, 0.11, 0.20, and 0.29 (mg/l-hr-m2) respective to each run. The differences in ammonia oxidation rate suggests that not only will viable nitrifying organisms grow within the fouling layer of a membrane they will grow at rate approximately 20 times faster than that seen occurring on the internal surface of the bench top apparatus. Also discussed in the research is the ammonia oxidation rate as a function of cross-flow velocity and trans-membrane pressure. Varying the cross-flow velocity and trans-membrane pressure suggested that the organisms on the membrane surface may actually be undergoing nitrification from the influent end of the membrane to effluent end of the membrane.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
| Creators | Email | Pitt Username | ORCID  |
|---|
| Miller, Charles Justin | cjm9@pitt.edu | CJM9 | |
|
| ETD Committee: |
| Title | Member | Email Address | Pitt Username | ORCID |
|---|
| Committee Chair | Neufeld, Ronald | | | | | Committee Member | Casson, Leornard | | | | | Committee Member | Reis, Robert | | | |
|
| Date: |
13 September 2004 |
| Date Type: |
Completion |
| Defense Date: |
3 June 2004 |
| Approval Date: |
13 September 2004 |
| Submission Date: |
17 March 2004 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Civil and Environmental Engineering |
| Degree: |
MSCE - Master of Science in Civil Engineering |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Cross-Flow Micro-Filtration; Fouling Layer; Nitrification |
| Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-03172004-131702/, etd-03172004-131702 |
| Date Deposited: |
10 Nov 2011 19:32 |
| Last Modified: |
15 Nov 2016 13:37 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/6517 |
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