Case Studies on Membrane Systems
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A presentation about wastewater improvement projects using membrane systems. Presented by Joe Longo and Tom Lee from Horsley Witten Group during the Buzzards Bay Coalition's 2011 Decision Makers Workshop series. Learn more at www.savebuzzardsbay.org/DecisionMakers
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Case Studies on Membrane Systems
- 1. Wastewater Improvement Projects Massachusetts Correctional Facilities Plymouth and Norfolk/Walpole, MA Joe Longo jlongo@horsleywitten.com Tom Lee fplee@horsleywitten.com 508-833-6600 Horsley Witten Group, Inc.
- 2. MCI Plymouth Horsley Witten Group, Inc.
- 3. MCI Plymouth • Existing Title 5 System – Serving 200 Inmates, 15 staff = 13,825 GPD – Failed Inspection in Sept 2007 • Need - Expanding Population – Design System to Serve 300 inmates, 21 staff for 31,000 GPD (**100 GPD/Inmate**) • Reason for MBR - Campus is located within several Drinking Water Zone IIs – Effluent Quality to Meet DEP’s Interim Guidelines on Reclaimed Water Horsley Witten Group, Inc.
- 4. Permits (Plymouth) • Groundwater Discharge Permit – Engineering / Hydrogeologic Reports • MEPA-ENF: >10,000 GPD in Zone II • MESA- Priority Habitat (8 moths and box turtle) • New Source Approval (new water supply well) • NOI – less than 100’ of Bumps Pond (well) Horsley Witten Group, Inc.
- 5. Existing Influent (Plymouth) • Daily Flow – 13,000+ GPD – 200 inmates – 15 staff • BOD – 358* mg/L (120 current longer term influent data) • TSS – 210 mg/L • TKN - 124 mg/L • Alkalinity 163 mg/L *24 hour sample during design Horsley Witten Group, Inc.
- 6. Design Effluent* (Plymouth) • Daily Flow – 31,000 GPD – 300 inmates – 21 staff • BOD <30 mg/L • TSS – 10 mg/L • Total Nitrogen <10 mg/L *Based on DEP Interim Guidelines on Reclaimed Water (BRP/DWM/PeP/P00-3) Horsley Witten Group, Inc.
- 7. Evaluate Alternatives (Plymouth) • Evaluated treatment alternatives: – Membrane Bioreactor (MBR) • $2.0 Million * – Sequencing Batch Reactors (SBR) • $2.6 Million – Rotating Biological Contactors (RBC) • $2.9 Million *DCAM Accepted Low Bid – Prevailing Wage Horsley Witten Group, Inc.
- 8. MBR Pros/Cons (Plymouth) Horsley Witten Group, Inc.
- 9. Primary Settling/Trash Rack Two 10,000 gal. EQ Tanks WWTP 1,200 s.f. (31,000 GPD) Leaching Beds Influent from Lift Station Dosing Tank 10,000 gal.
- 10. Permeate Pump UV Post Anoxic Zone/Carbon Dosing Tank 10,000 gal. Membrane Quick Connect for Wasting Effluent To Disposal Field RAS AerationKaiser Blowers EQ 10,000 gal. Anoxic/Mixing EQ 10,000 gal. Primary Settling/ Trash Tank 10,000 gal. Influent
- 11. Operation and Results (Plymouth) • Clear Water Test and Start-Up March/April 2010 • Mixed Liquor Conc 8,000 mg/L • Wasting – 3,000 gal/month • MBR Cleaning In Place (CIP) – 5% NaOCl Solution – Twice Since Startup Horsley Witten Group, Inc.
- 12. Operation and Results (Plymouth) GOOD RESULTS!! • TSS 0.1 – 0.2 mg/L (<10) • BOD 0.5 – 3.0 mg/L (<30) • Total Nitrogen 3.5 – 8 mg/L (<10) • Still optimizing plant operation Horsley Witten Group, Inc.
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- 18. MCI-Norfolk • Existing 0.486MGD WWTP with Sanitaire Package Treatment Units (PTUs) to Sand Filter Beds then surface water discharge • Interruption of Service Not Option • Upgrade Required to meet new NPDES Discharge Permit (discharge by 12/2012) – BOD 7 mg/L – Total Ammonia Nitrogen 1 mg/L – Total Phosphorus 0.1 mg/L (April - Oct) Horsley Witten Group, Inc.
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- 20. Getting Started • • • • • (Norfolk) HW hired by DCAM – March 2009 DEP Approved design – November 13, 2009 Bid Date – December 2009 Start Construction – February 2010 Start-up – March 2011 Horsley Witten Group, Inc.
- 21. Existing Influent (Norfolk) • Ave Daily Flow – 0.486 MGD – 3,000 inmates – 1,400 staff • • • • BOD – 350 mg/L TSS – 347 mg/L Total P – 4.1 mg/L TKN – 31 mg/L Horsley Witten Group, Inc.
- 22. Evaluate Technologies/Cost (Norfolk) • MBR Selected based on recent success at Plymouth, and flexibility of installing MBR without Interruption of Facility Operation • Membrane - $7.7Million (DCAM accepted contractor low bid)- *Includes Conversion of EQ tanks, Headworks, UV, etc. Horsley Witten Group, Inc.
- 23. UV Effluent to UV Sludge Wasting Tanks Existing EQ Tanks (75,000 gal. each) Existing Office/Lab New WWTP (10,000 s.f) 0.5 MGD Headworks Coarse/Fine Screen Distribution Box Convert to Anerobic Tank (200,000 gal.) Convert PTU’s to EQ (400,000 gal. total)
- 24. Train 1 To Anerobic Tank Train 2 To Anerobic Tank Influent Anoxic Tank, Mixing & Carbon Addition Kaiser Blowers Aeration Membrane RAS Permeate Pumps (Under Vacuum) Effluent to UV RAS Sludge Wasting
- 25. From “Sticks n Bricks” to the Real Thing Horsley Witten Group, Inc.
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- 30. Questions • Anyone interested in touring either facility let us know. Joe Longo jlongo@horsleywitten.com Tom Lee fplee@horsleywitten.com 508-833-6600 Horsley Witten Group, Inc.