Partners In Development, Mott MacDonald With material so variable as - PowerPoint PPT Presentation

Oct 29, 2023 •372 likes •542 views

A rapid, , low-cost test for faecal sludge strength used to evaluate pump performance David Still Chloe Underdown, Jamie Radford, Kapanda Kapanda Partners In Development, Mott MacDonald With material so variable as faecal sludge, how can one

A rapid, , low-cost test for faecal sludge strength used to evaluate pump performance David Still Chloe Underdown, Jamie Radford, Kapanda Kapanda Partners In Development, Mott MacDonald
With material so variable as faecal sludge, how can one objectively compare the performance of different pit emptying technologies?
eVac – a portable pit it emptying machine ● Vacuum pumping machine ● Powered by a 2hp motor/engine ● < 70 kg
eVac – a a portable pit it emptying machin ine But how good is it? How can one compare performance objectively, quantitatively, when the medium is faecal sludge?
The penetrometer – widely used for testing bearing strength in roads and foundations
Cone replaced with ball
Penetrometer for faecal slu ludge
P-li lite Lightweight manual penetrometer
P-li lite Lightweight manual penetrometer ● Improved sensitivity at low strengths
Trialing digital P-li lite measurement using Hammer and anvil accelerometer
Accelerometer data – can be used to measure dis isplacement against tim ime
Lusaka Fie ield ld Tria ials ● GIZ funded ● Demonstrate eVac ● Measure performance ● Comparison to manual emptying (steel pole and bucket)
Conversion to Strength
eVac Performance ● Flow rate combined with strength data and field observations
P-li lite Performance ● Easy to use ● 5 minutes / test ● Quantitatively evaluate pump performance How to improve digital measurement?
How good is is your emptying technology?

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