Bendick, John A
(2003)
FEASIBILITY OF CROSS-FLOW MICROFILTRATIONFOR COMBINED SEWER OVERFLOWS.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
Combined sewer overflows contribute high levels of suspended solids, pathogenic microorganisms, oxygen-demanding compounds and other pollutants into the receiving stream [US EPA, 2001]. The level of pollution coupled with regulatory pressure is challenging communities to find feasible treatment alternatives. Microfiltration may be a preferred treatment alternative. The feasibility of cross-flow microfiltration for the treatment of a dilute primary sewage effluent simulating combined sewer overflow wastewater was investigated. Ceramic membranes of various pores sizes (0.05 - 5.0 um) were tested at the bench and field scale to understand the impact of operating conditions on the permeate water quality and flux rate. A 0.2 um membrane operated with a 1.8 m/s cross flow velocity, a transmembrane pressure less than 2.1 bar and a backpulse frequency of 60 seconds were selected as the preferred operating conditions. The 0.2 um membrane consistently met water quality objectives for fecal coliforms, E Coli, enterococci, BOD5 and SS. The steady state flux rates are impacted by the feed suspended solids concentration and temperature, and an understanding of these parameters is critical to commercial scale design.
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Details
| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
3 September 2003 |
| Date Type: |
Completion |
| Defense Date: |
4 June 2003 |
| Approval Date: |
3 September 2003 |
| Submission Date: |
4 August 2003 |
| 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: |
BOD; Combined Sewer Overflow; Cross Flow Velocity; Microfiltration; NH3-N; Primary Sewage Effluent; Bacteria; Transmembrane Pressure |
| Other ID: |
http://etd.library.pitt.edu:80/ETD/available/etd-08042003-201758/, etd-08042003-201758 |
| Date Deposited: |
10 Nov 2011 19:56 |
| Last Modified: |
15 Nov 2016 13:48 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/8873 |
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