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Measuring viscosity Viscosity testing using both a Searle & Hache viscometer
Municipal wastewater sludge • Municipal wastewater sludge is a Non-Newtonian Fluid. • Sludge can start out at 300,000 cps and with the addition of shear can come down to less then 300 cps. • A centrifugal pump can not pump a viscosity >350 cps and a sludge density of >6-8 percent. Beware: water treatment sludge uses ALUM which is dilatant or shear thickening.
Page 1 and 2: Wastewater Treatment Techniques for
Page 3 and 4: …is like selecting the correct go
Page 5 and 6: What’s your application? − Retu
Page 7 and 8: Sludge video #2
Page 9 and 10: Sludge video #4
Page 11 and 12: Viscosity • Viscosity, property o
Page 13: NEWTONIAN • Viscosity decreases w
Page 17 and 18: What is the Rheology of the sludge?
Page 19 and 20: Laboratory & Field test results •
Page 21 and 22: Things we learned: • When designi
Page 23 and 24: • Hydraulic gradient • Pressure
Page 25 and 26: TR 185 h where, 2 V F K 2 g K= po
Page 27 and 28: Flygt’s Sludge Module within FLYP
Page 29 and 30: Types of pumps used for “Thickene
Page 31 and 32: What’s really important to WWTP?
Page 33 and 34: PD versus Centrifugal pumps • Pos
Page 35 and 36: Progressing Cavity Pumps
Page 37 and 38: Progressive Cavity Pumps A single h
Page 39 and 40: Failure points…
Page 41 and 42: Manufacturer’s of Rotary Lobe pum
Page 43 and 44: Failures…
Page 45 and 46: NON-CLOG PRODUCT FEATURES Tangentia
Page 47 and 48: Non-clog Pumps
Page 49 and 50: RECESSED IMPELLER or Vortex Spheric
Page 51 and 52: Centrifugal Screw Pump Vertical lea
Page 53 and 54: WEAR: Cast iron impeller & insert r
Page 55 and 56: FLYGT “Chopper” pumps Advantage
Page 57 and 58: Let’s talk clogging…
Page 59 and 60: …or these modern day clogging hea
Page 61 and 62: JEA - Jacksonville, Florida
Page 63 and 64: Oak Ridge, TN
Page 65 and 66:
Summary If it flows, use gravity.
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• What’s really important to th
Page 70 and 71:
But to properly select a pump, you
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Types of pumps used for sludge Plun
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PD vs. Centrifugal pumps • Positi
Page 76 and 77:
Competing Technologies
Page 78 and 79:
How does a Plunger pump work?
Page 80 and 81:
Easy to Maintain????
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Advantages • Positive displacemen
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New TWAS Pump • NT3102 - 5hp was
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Manufacturers of Disk or Diaphragm
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Operation sequence of Diaphragm pum
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Do It Yourself with genuine Double
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Midland, Texas - Diaphragm pump •
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Manufacturers of “PC” pumps •
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Advantages •Pressures to 400 psig
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6,000 5,000 4,000 3,000 2,000 1,000
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Digester Recirculation • Digester
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Rotary Lobe Pumps
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ROTARY LOBE Advantages •Metered f
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Replace RLP with Npumps • Custome
Page 108 and 109:
Screw Conveyor Pumps
Page 110 and 111:
Screw Conveyor Pump Manufacturers
Page 112 and 113:
Screw Conveyor Pumps
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Screw Pump Replacement O’Fallon,
Page 117 and 118:
Cutter Pumps • Vaughan • Landia
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Competitor’s pump
Page 121 and 122:
Weakness as perceived by the compet
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Advantages • Heavy duty design
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Flygt N-Pump Advantages •Solids H
Page 127 and 128:
Vaughan Chopper Replacement • Req
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MACERATORS
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…because they cannot handle rags!
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Npumps do not require a Macerator!
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For ALL Treatment Plant Pump Activi
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THANK YOU! Paul A. Nelsen Market Ma
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