TROPHY CLUB MUNICIPAL UTILITY DISTRICT WASTEWATER TREATMENT PLANT PROBLEMS & POSSIBLE SOLUTIONS Presented by: 1825 Market Center Blvd Dallas, Texas 75207
Work Completed • Performed elevation survey of key components of the WWTP equipment in order to study the hydraulic profile of the plant. • Performed calculations for the sizing of various units and pipe sizing per flow requirements and loading parameters. • Reviewed previous permitting and design documents as well as past and existing permits. • Conducted meetings with Jennifer McKnight and Karl Schlielig in order to assess how the plant is currently being operated and what problems they observe from operations and managements spectrums.
TCMUD WWTP Original Design vs Current Conditions Original Design Current Conditions • Population* – 10,000 • Population* – 13,000 -14,000 • BOD – 10mg/l • BOD – 5 mg/l • TSS – 15mg/l • TSS – 10mg/l • Raw – 180mg/l • Raw – 200-240mg/l • Q = 1.75 MGD • Q = 1.90 MGD *Town of Trophy Club Only
Aeration Basins Aeration Basins Issues • Limited Capacity & Number • Wall Elevations Too Low • Splitter Box Too High
Tertiary Filters Filter Issues • Limited Hydraulically • No Redundancy
RAS/WAS Pump Station Pump Issues • RAS and WAS Pump Limitations • Capacity and Operating Flexibility
Effluent Lift Station Effluent Lift Station Issues • Insufficient Pump Capacity • UV Channel/Weirs Surcharging
Recommendations • Complete detailed Preliminary Engineering Report (PER) to consider options, sizes, locations and cost estimates: – Detailed Unit Process Assessment – Submit PER to TCEQ – Construct Third Treatment Basin & Modify Existing Basins – Construct Third Tertiary Filter Basin – Upgrade Pump Stations – RAS/WAS and Effluent – Biosolids/Sludge Operations Enhancements • Investigate Funding Options
Funding Options TYPE DURATION RATE Open Market 3 months 3.75 – 4.25% TWDBD 8 months 4.1% Development Fund TWDBD Clean Water 2 years 3.1% Supply Revolving Fund
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