Solutions to Mitigate Effects of Microthrix parvicella at the ... - pncwa

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Why is Microthrix a Problem? • Foaming • Aesthetics • Carryover to effluent • Breeding ground for filaments • Digester foaming • Poor Settling • Formation of high sludge blankets • High effluent TSS • Loss of Clarifier capacity • Requires low SRT to wash out or chemicals to kill • Nitrification can be a problem with both solutions Bulking sludge overflowing clarifier Brown and Caldwell 6
Meridian Microthrix Issues Seasonal MP blooms (winter and spring) lead to: • Microthrix bulking = reduced capacity of clarifiers • Microthrix foam leads to high TSS = increased filter backwashing Biological foam on AS basin
Page 1 and 2: PNCWA 2012 Annual Conference Daniel
Page 3 and 4: Background
Page 5: What is Microthrix Parvicella (MP)?
Page 9 and 10: City Needed Help Controlling MP •
Page 11 and 12: Control of Microthrix Various contr
Page 13 and 14: Investigating Solutions Can we elim
Page 15 and 16: Investigating Solutions Can we chan
Page 17 and 18: Investigating Solutions Chemical ad
Page 19 and 20: BC led investigations - effects of
Page 21 and 22: Investigating Solutions Can we elim
Page 23 and 24: BC led investigations - eliminate f
Page 25 and 26: BC led investigations - Foam Wastin
Page 27 and 28: Eliminating MP in Meridian • Inst
Page 29 and 30: Eliminate foam trapping - Repipe RA
Page 31 and 32: Eliminate Foam Trapping - New RAS P
Page 33 and 34: Classifying selectors have downside
Page 35 and 36: PAX vs. Classifying Selector - Whic
Page 37 and 38: Concluding Remarks
Page 39 and 40: Questions Brown and Caldwell 39

Solutions to Mitigate Effects of Microthrix parvicella at the ... - pncwa

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