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

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Meridian Microthrix Control Methods • Reduce SRT and/or add chlorine for bulking control • Inhibited nitrification • Increased effluent TSS • High effluent TSS = reduced tertiary filter capacity • No nitrification = no reclaimed water production • 15.5 mg/L TN limit SVI (mL/g) 250 200 150 100 50 0 Oct-‐08 Dec-‐08 Feb-‐09 Mar-‐09 May-‐09 Jul-‐09 Aug-‐09 Oct-‐09 Dec-‐09 Jan-‐10 SVI plot for Meridian Plant
City Needed Help Controlling MP • BC retained to review entire process
Page 1 and 2: PNCWA 2012 Annual Conference Daniel
Page 3 and 4: Background
Page 5 and 6: What is Microthrix Parvicella (MP)?
Page 7: Meridian Microthrix Issues Seasonal
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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