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2013
06. Safe fragrances
05. DNA mass information store
04. Garden mounds for permaculture
03. Silver as high-tech material
02. Micro needle transmits medications and light
01. Electricity storage in gravity systems

2012
12. An eye on space hazards
11. Water purification through freezing
10. Solar shingles
09. Trinary code
08. Vegetation-based battery materials
07. Indoor position location
06. The interface industry
05. Hypersonic aircraft
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02. Magnet making bacteria
01. Ultra-light solids

2011
12. Ultrasound in water
11. Projected touchscreen
10. Electric airplane
08. Glass hard disc
04. Nuclear hazard
03. Clearing “sewer soap”
02. Water harvesting
01. Tea bag size personal water filter

2010
12. Human powered water transport
11. The Technium
08. Bio-remediation of oil spills
07. Cleaner coal
05. Oil spill remediation
04. Solar towers
03. Brain-computer
02. Biodiesel producing bacteria
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2009
12. Levitating living organisms
11. A new blue
10. Polymer magnets
09. Electric vehicle batteries
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02. Implantable ID chips
01. Air cleansing building material

2008
12. ebooks
11. Energy Harvesting
10. Private space-flights
09. Virus identification chip
08. Bio-fuels
07. Electronic financial trading
06. Bio-remediation
05. New tech agriculture
04. Manufactured Hotels
03. Magnetic Induction
02. Genetic Vaults
01. Solid-state lighting

2007
12 Bacteria in agriculture and industry
11. Blue revolution
10. Electronic nose
09. Nuclear sarcophagus
08. Shape shifting technology
07. Thought activated technology
06. Green is cool - make me look green
05. Electronic 'drugs'
04. Super-canals and super-ships
03. Environmentally friendly technology: greens versus grays
02. Agriculture: food,fiber and fuel
01. FPGA floating-point performance surpasses microprocessor

2006
08. Energy sources for electricity compete
07. Universal interface (UI)
06. Magnetic levitation
05. Light pipes
04. Storage of electricity
03. Automotive engines
02. Molecular assembly
01. Introducing Technoscan Newsbriefs


Vol. 6, No. 1. January 31, 2011
ISSN 1932-3018

Tea bag size personal water filter
Positioning this technology in the
Functionality Grid
  Output
Matter
(M)
Energy
(E)
Information
(I)
A
C
T
I
O
N
Process
Transport
Storage
Reformatted from: Van Wyk, Rias J: Technology - A Unifying Code, 2004, SMG, Cape Town, p.34. Based on: Ropohl, Gunter: Eine Systemtheorie der Technik, 1979, Carl Hanser Verlag, Munich and Vienna, p.178.
This Newsbrief deals with a new personal filter to purify polluted water for drinking— a tea bag size device that fits into the neck of a bottle. In terms of the Atlas of Technological Megatrends. it is concerned with the functionality of matter processing.
In 2010 the University of Stellenbosch in South Africa announced a further step forward in providing clean drinking water to needy communities. http://blogs.sun.ac.za/news/2010/07/28/su-scientists-develop-a-high-tech-‘tea-bag’-filter-for-cleaner-water/
Water purification involves a number of possible approaches. These include:
  • Filtration - pollutants are physically removed
  • Osmosis - pure water migrates from a contaminated environment
  • Bio-remediation - living organisms break down or absorb pollutants
Filtration usually requires large-scale plants, advanced equipment, and much energy. By reducing the filter to an extremely convenient format, the size of a tea bag, filtration technology becomes simple, personal and accessible. The filter in question consists of a tiny porous bag, filled with active carbon granules that remove harmful chemicals. The bag is made of a standard material used in off-the-shelf rooibos tea bags. The inside is coated with a thin film of biocides encapsulated within minute nanofibres, which kills all disease-causing microbes. The bag is biodegradable. The device can filter one liter of contaminated water and is then disposed of.
The invention is a unique combination of nano-technology needed for the nanofibres, a new size, and conventionally available components. In terms of NASA’s nine level scale of technology readiness, the device is at TRL 5.

© Rias J. van Wyk, 2013. Editor.