point-of-use water systems: the landscape dr jo burgess 2 nd october 2012
TRANSCRIPT
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Point-of-Use Water Systems: The LandscapeDr Jo Burgess2nd October 2012
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Physical landscape
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Research landscape
Peaks of expertise exist:Durban University of TechnologyCouncil for Scientific and Industrial ResearchUniversity of VendaUniversity of the Western CapeUniversity of JohannesburgTshwane University of Technology Stellenbosch University
Some successesLots more to do
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Durban University of Technology
Remote Rural Water Treatment System (RRWTS)
Simple gravity-driven microfiltration unit Removes suspended solids, colloids and 95% bacteria from raw water, gives a clear permeate which can be easily disinfectedLab prototype small scale manufacture community-based testing in KZN / E Cape borderlandsEasy to use…
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Council for Scientific and Industrial Research
AdvantagesAccompanying hygiene education programme.All-in-one treatment (coag/floc, clarification, filtration, disinfection).Locally manufactured.
Some success, fell into disuse
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University of Venda
Evaluation of numerous POU devices (Centres for Disease Control and Prevention (CDC), Potters for Peace (PfP), etc.)Thorough, multidisciplinary, highly collegialPatel Smart Pot Grand Challenge entryAvoid problems observed with CDC, PfP, etc. designsBetter covers, seals, stands. Lid = washing container for filter.
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University of the Western Cape
Environmental chemistry / technologyPatel Smart Pot Grand Challenge entryApplying PfP principles to local materialsZeolites & coal fly ashLocally mixed, pressed, dried and fired ceramic filtersImpregnated with silver, thus includes disinfection
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University of Johannesburg
Patel Smart Pot Grand Challenge finalist: one of only four worldwide.Water and health research focus; microbiology & molecular biologyBacked up by community-based evaluationsThorough, multidisciplinary, highly collegialDeveloped in collaboration with industrial designerSingle container for treatment and storage of water
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Tshwane University of Technology
Comparative evaluation of many types of filters:
Ceramic, w & w/out silverBiosand, w & w/out zeoliteClay pots, w & w/out silver
Multidisciplinary projects
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Stellenbosch University
Numerous projects:Nano “teabag”Kleinmond housing - disinfection systems for domestic RWH tanksMultidisciplinary, many collaborations
ServicesSubstructure
Finishes
Roof assembly
RWH Tank
Superstructure
Solar geyser
Photo-voltaic panel
Filtration cartridge systemPhysical filtration, sorption, and biocidal actionNanofibre based filter with carbonFor immediate use (no storage)Comparison to solar pasteurisation
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In summary
Multidiscplin
ary work
‘Relevant s
cience
does not
automatica
lly sig
nify
socia
l acce
ptance
’
Very ac
tive, h
ighly
colle
gial re
search
ers
Cart before th
e horse
inventions
Recontam
ination of
treate
d wate
r