Reinventing the toilet. Gates Foundation challenge.

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Presentation transcript:

Reinventing the toilet

Gates Foundation challenge

Condensing nanobeads Hollow fibre membrane Pathogen free water Waterless flush system Nano- sprayer

Action

Hollow fibre membrane

The membrane

7

Low energy, unacceptable flux Relatively low energy demand, acceptable flux Highest energy requirement, highest flux Membrane data highlight

Condensing nanobeads Pathogen free water

Condensing

11

Condensing results Initial data sets benchmarking standard glass media have shown ~ 40 % water capture from the vapour stream

Drainage rate (or passive collection) 32˚ 67.7˚ 78.7˚ Synthetic urine vapour. Flow rate (4 LPM), BV (0.13 L), v (2.9 m/min), EBCT (1.95 s), temperature differential (< 2°C) 32.0° Increased hydrophilicity apparently enhances moisture retention Does hydrophobicity govern drainage efficiency?

Nano- sprayer

Weetabix challenge After 2 months at room temperature: dewatered and mould free

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