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

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Project Goals 1. Maximize peak flow treated through secondary process Provide wet weather operating modes 2. Maintain stable operation during all flow conditions Maintain well settling sludge across all operating modes, provide tools to address settleability issues 20
Maintain Well Settling Sludge Two types of selectors provided: Anaerobic selector at Zones 1 and 2 Aerobic selector at Zone 6 RAS 1 2 3 4 5 6 7 65% 35% To Secondary Clarifiers RAS 1 2 3 4 5 6 7 To Secondary Clarifiers Aerobic RAS Storage Primary Effluent Encourages PAO growth to remove soluble BOD anaerobically. Pipe Bridge Small, baffled zone creates high F:M, encouraging rapid uptake and storage of soluble BOD by heterotrophs Anaerobic Anaerobic/aerobic swing Aerobic 21
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: Two Wet Weather Operating Modes Ste
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 and 40: Clarifier Improvements Failure mech
Page 41 and 42: Thank You! Questions Contact Infor

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

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