Rural Water - Quarter 3, 2016 - 14


technology from MIT promise five times
more water generation simply by adjusting
the netting material.
According to a press release,
researchers found that the best
performance comes from a mesh made of
stainless steel filaments about three or four
times the thickness of a human hair, and
with a spacing of about twice that between
fibers. The mesh is dip-coated using a
solution that decreases a characteristic
called contact-angle hysteresis. This allows
small droplets to more easily slide down
into the collecting gutter as soon as they

form, before the wind blows them off
the surface.
The system is currently deployed in the
coastal mountains of Chile at the edge of
the Atacama Desert, yielding a few liters
of drinking water per day for each square
meter of mesh, though the theoretical
calculations show that newly designed
systems operating at certain times of the
year (stronger wind, denser fog) could yield
up to 12 liters per day or more.
The researchers suggest that large
mesh structures could be set up relatively
inexpensively and, once in place, would

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14

THIRD QUARTER 2016

618635_Central.indd 1

30/03/13 5:53 PM

cost virtually nothing to operate-
only occasionally needing brushing to
remove particles.

Who said water and
electricity don't mix?
Cost and infrastructure requirements
can sometimes be a barrier to utilizing
desalination. But MIT researchers have
devised a new alternative to traditional
desalination technology that could help
address those challenges. The process is
called shock electrodialysis, whereby an
electric shock is introduced to a stream of
flowing water.
The treatment does not rely on barriers
to strain sodium particles from water.
Instead, it uses a "frit"-porous material
made of small glass particles-with
electrodes attached to the sides. When a
charge is applied, water with higher salt
content begins to separate itself from
the sodium-depleted water. When the
electrical current reaches a certain point,
the water flow breaks into two channels.
The fresh water can then be collected
and used.
The system not only removes salt but
also other contaminants, and because
an electrical current passes through the
stream, it may also sterilize the water
in the process. Because the "filter"
in the treatment process is relatively
inexpensive (glass), the scalable nature of
the technology could greatly impact the
world water crisis.
"Unlike some other approaches
to desalination, this one requires little
infrastructure, so it might be useful for
portable systems for use in remote
locations, or for emergencies where
water supplies are disrupted by storms
or earthquakes," graduate student
and research team member Sven
Schlumpberger said in a statement. Though
the technology has only been produced in a
lab, the next step is to scale the system for
practical testing.
But MIT isn't the only university getting
in on the action. Also using electricity to
take the salt out of water, researchers from
the University of Texas at Austin and the
University of Marburg in Germany have
developed a "water chip" that creates a
small electrical field that separates salt
from seawater. The technology, which
is still under development and works at


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Table of Contents for the Digital Edition of Rural Water - Quarter 3, 2016

The Latest Drinking Water Innovations
Potable Reuse of Water: A View from Arizona
Getting the Public on Board with Your Potable Water Reuse Plan
Recapturing Revenue from Water Loss
Water Depletion and the Customer
Boardroom Courtesy
From the President
Finance: Audit Requirements
Technology: The New System that Uses Sound to Alleviate Water Shortage
Emergency Management: Creating a Drought Response Plan
A Day in the Life of a Circuit Rider
Regulatory Update
Throwing My Loop: An Old Familiar Tune
Index to Advertisers/ Advertisers.com
Rural Water - Quarter 3, 2016 - cover1
Rural Water - Quarter 3, 2016 - cover2
Rural Water - Quarter 3, 2016 - 3
Rural Water - Quarter 3, 2016 - 4
Rural Water - Quarter 3, 2016 - 5
Rural Water - Quarter 3, 2016 - 6
Rural Water - Quarter 3, 2016 - 7
Rural Water - Quarter 3, 2016 - 8
Rural Water - Quarter 3, 2016 - 9
Rural Water - Quarter 3, 2016 - 10
Rural Water - Quarter 3, 2016 - From the President
Rural Water - Quarter 3, 2016 - The Latest Drinking Water Innovations
Rural Water - Quarter 3, 2016 - 13
Rural Water - Quarter 3, 2016 - 14
Rural Water - Quarter 3, 2016 - 15
Rural Water - Quarter 3, 2016 - 16
Rural Water - Quarter 3, 2016 - 17
Rural Water - Quarter 3, 2016 - Potable Reuse of Water: A View from Arizona
Rural Water - Quarter 3, 2016 - 19
Rural Water - Quarter 3, 2016 - 20
Rural Water - Quarter 3, 2016 - 21
Rural Water - Quarter 3, 2016 - Getting the Public on Board with Your Potable Water Reuse Plan
Rural Water - Quarter 3, 2016 - 23
Rural Water - Quarter 3, 2016 - 24
Rural Water - Quarter 3, 2016 - 25
Rural Water - Quarter 3, 2016 - Recapturing Revenue from Water Loss
Rural Water - Quarter 3, 2016 - 27
Rural Water - Quarter 3, 2016 - 28
Rural Water - Quarter 3, 2016 - 29
Rural Water - Quarter 3, 2016 - 30
Rural Water - Quarter 3, 2016 - Finance: Audit Requirements
Rural Water - Quarter 3, 2016 - 32
Rural Water - Quarter 3, 2016 - 33
Rural Water - Quarter 3, 2016 - 34
Rural Water - Quarter 3, 2016 - Technology: The New System that Uses Sound to Alleviate Water Shortage
Rural Water - Quarter 3, 2016 - 36
Rural Water - Quarter 3, 2016 - Emergency Management: Creating a Drought Response Plan
Rural Water - Quarter 3, 2016 - 38
Rural Water - Quarter 3, 2016 - 39
Rural Water - Quarter 3, 2016 - A Day in the Life of a Circuit Rider
Rural Water - Quarter 3, 2016 - 41
Rural Water - Quarter 3, 2016 - 42
Rural Water - Quarter 3, 2016 - Water Depletion and the Customer
Rural Water - Quarter 3, 2016 - 44
Rural Water - Quarter 3, 2016 - Boardroom Courtesy
Rural Water - Quarter 3, 2016 - 46
Rural Water - Quarter 3, 2016 - 47
Rural Water - Quarter 3, 2016 - Regulatory Update
Rural Water - Quarter 3, 2016 - 49
Rural Water - Quarter 3, 2016 - 50
Rural Water - Quarter 3, 2016 - Throwing My Loop: An Old Familiar Tune
Rural Water - Quarter 3, 2016 - 52
Rural Water - Quarter 3, 2016 - 53
Rural Water - Quarter 3, 2016 - Index to Advertisers/ Advertisers.com
Rural Water - Quarter 3, 2016 - 55
Rural Water - Quarter 3, 2016 - 56
Rural Water - Quarter 3, 2016 - 57
Rural Water - Quarter 3, 2016 - 58
Rural Water - Quarter 3, 2016 - cover3
Rural Water - Quarter 3, 2016 - cover4
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http://www.nxtbookMEDIA.com