Town of Taos Taos Valley Regional Wastewater Treatment

MBR Upgrade Project Description Headworks – no change Aeration basins – divided into anaerobic

Funding • Grant and Loan funding combination • Water Trust Board (2 funds): •

MBR Selection • Similar or lower costs • Combines aeration, clarification and filtration into

Membrane Treatment • GE/Zenon Zee. Weed 500 D Module – Immersed Hollow-Fiber Ultrafiltration Technology

Train Components • Four Trains with five slots each for 20 total slots •

Photovoltaic Array 79. 2 k. W array (360 panels @ 220 W each) Roof

Slides: 13

Download presentation

Town of Taos / Taos Valley Regional Wastewater Treatment Facility MBR Upgrade Emerging Technologies 2012 Infrastructure Finance Conference Kari Edenfield, PE – Souder, Miller & Associates

MBR Upgrade Project Description Headworks – no change Aeration basins – divided into anaerobic (no oxygen) and aerobic (oxygen) sections. • MBR basins • • • Additional aeration with for concentrated biomass • Pumps will pull water through hollow fiber • • • membranes No more clarifiers for settling solids Recycle biomass – no change Effluent and Solids – no change (UV to golf course and arroyo; solids thickening/processing)

Funding • Grant and Loan funding combination • Water Trust Board (2 funds): • Grant: $3, 570, 000; Loan: $730, 000 • American Reinvestment and Recovery Act of 2009 (ARRA): • Grant: $2, 100, 000; Loan: $1, 000 • • Match Amount Total: Grant: $5, 670, 000; Loan: $1, 730, 000

MBR Selection • Similar or lower costs • Combines aeration, clarification and filtration into a single step (reduced footprint-25% size of conventional plant) • Less process steps to monitor, lower energy costs, best quality effluent Influent Headw orks Aeration Clarifiers Aeration Tertiary Treatment UV Conventional Treatment Influent Headw orks MBR Alternative Aeration /Anoxic basin MBR UV Effluent

Process Flow

Membrane Treatment • GE/Zenon Zee. Weed 500 D Module – Immersed Hollow-Fiber Ultrafiltration Technology • Nominal Surface Area = 340 sq ft/module • 48 Modules per Cassette Parameter Influent NPDES Permit Current Requirements Treatment Future Permit MBR Requirements BOD 250 mg/l < 30 mg/L 2 -15 mg/L < 10 mg/L < 1 mg/L TSS 300 mg/L < 30 mg/L 3 -16 mg/L < 10 mg/L < 1 mg/L TKN 30 mg/L < 3 mg/L • table 20 mg/L < 1 mg/L Ammonia Nitrates Fecal Coliform > 1000 per 100 mls < 100 2 -18 mg/L < 10 mg/L < 3 mg/L 2 – 124 <5 0

Train Components • Four Trains with five slots each for 20 total slots • 16 Cassettes currently with buildout of four more

Photovoltaic Array 79. 2 k. W array (360 panels @ 220 W each) Roof slope = 1: 12 for more direct exposure Cost = approx. $560, 000 Portion of Green Component (of ARRA 2009 funding) • Mounted 2’ above roof for airflow and increased efficiency • Tied in to grid (not direct use) • •