A recent long-range water-planning study concluded that Dallas Water Utilities will need to reuse 120 mgd of treated wastewater effluent in the near future. It is envisioned that 60 mgd of this requirement will come from the Southside Wastewater Treatment Plant (Southside). The Phase IV Expansion provides a timely opportunity to produce effluent suitable for reuse. The reuse water, which would be used for lake augmentation, must meet stringent nitrogen and phosphorus limits. To achieve these standards, microfiltration and cloth-media filtration were pilot tested to provide phosphorous polishing and pathogen removal for all Phases. The purpose of the pilot study was to confirm the basis of design, provide performance data, and allow the Southside staff to become familiar with the technologies being considered. In particular, the study aimed to determine and compare the design flux rates for membrane filtration of secondary effluent versus granular-media filter effluent. Additionally, it was desired to test the phosphorous removal capabilities of cloth-media filtration to better evaluate this technology for use in the Phase IV Expansion instead of granular-media filters, which are used in Phases I through III.
This presentation is available to AMTA Members only.
- Adam Evans, PE
- HDR Engineering, Inc.
- AMTA Biennial Conference, Las Vegas, NV
- Biennial Conference
- Phosphorous Removal, reuse, water supply augmentation, microfiltration, cloth-media filtration, Dallas Water Utilities (DWU)