Maximizing Secondary Wet Weather Treatment Capacity at ... - pncwa

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Conclusion 1. Project is currently under construction and will come online by June of 2014 2. CFD helped us understand clarifier failure mechanism but no cost effective improvements found 3. Wet weather flows receiving secondary treatment will be maximized by: – Incorporating step feed for normal operation and two wet weather operating modes – Addressing sludge settleability issues and providing tools to maintain well settling sludge – Implementing a high degree of automation to accommodate the highly dynamic winter time flows and simplify treatment plant operation 40
Thank You! Questions Contact InformaBon adrienne.menniti@ch2m.com
Page 1 and 2: Maximizing Secondary Wet Weather Ca
Page 3 and 4: Portland Rainfall Patterns 180 We
Page 5 and 6: Columbia Boulevard WWTP Largest was
Page 7 and 8: Columbia Boulevard WWTP Wet Weather
Page 9 and 10: Challenges to Maximizing Secondary
Page 11 and 12: Challenges to Maximizing Secondary
Page 13 and 14: Project Goals 1. Maximize peak flow
Page 15 and 16: Two Types of Wet Weather Events 1.
Page 17 and 18: Two Wet Weather Operating Modes Ste
Page 19 and 20: Two Wet Weather Operating Modes Ste
Page 21 and 22: Maintain Well Settling Sludge Two t
Page 23 and 24: Provide Tools for Sludge Settleabil
Page 27 and 28: Decision to Shift Operating Mode is
Page 31 and 32: Clarifier Capacity Analysis Based o
Page 37 and 38: Clarifier Failure Mechanism Also us
Page 39: Clarifier Improvements Failure mech

Maximizing Secondary Wet Weather Treatment Capacity at ... - pncwa

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