|
Pressure Exchanger cuts Desalination Costs
 Germany
-- An isobaric energy recovery system developed by KSB
started operation in the Pembroke seawater desalination
plant on Malta this past July. Consisting of two SalTec
DT250 operating in parallel, the system uses hydraulic power
transmission to reduce energy costs compared with
conventional solutions, such as turbines, for example.
The key element is a pressure
exchanger which transfers the energy of the concentrated
brine directly to the raw seawater without the need for
mechanical conversion. An electronic control system records
all operating modes of the higher-level reverse osmosis (RO)
system and adjusts pump and pressure exchanger control as
required. It ensures that the water column in the pressure
exchanger vessels is accelerated and decelerated so gently
that switching the rotating valve of the pressure exchanger
does not cause pulsations.
KSB also supplied the
high-pressure pump employed to generate the pressure
required for the reverse osmosis process and the booster
pump used to compensate for the pressure losses in the
pressure exchanger circuit. All components are designed to
ensure that the production costs for a cubic meter of
desalinated water are lower than those of other systems. KSB
is the first manufacturer to supply this type of all-in
package for the RO process.
The Pembroke plant produces more
than 40,000 cubic meters of desalinated water per day and is
therefore an important drinking water supplier, both for
400,000 inhabitants and for more than one million tourists
who visit Malta every year. By using state-of-the-art pumps
and pressure exchanger technology, the plant operator uses
around 35 % less energy.
Since as early as August 2003, a
SalTec pilot system has been operating in Frankenthal and a
further system in Sharm El Sheik, Egypt, since mid-May 2004.
Source:
http://www.ksbgroup.com/
|
|
|
i
i |
|
This
newsletter is sponsored by:
|
|
|
|
|
i
i |
|
Basin Water acquires assets from
Shaw
 RANCHO
CUCAMONGA, CA -- Basin Water, Inc. today announced that it
has acquired the bioreactor and biofilter business of Shaw
Environmental & Infrastructure, Inc., (Shaw) for $1.5
million cash (subject to adjustment for working capital)
plus the settlement of a disputed claim against Shaw for
amounts Basin Water claims to be owed by Shaw.
That dispute involves an ion
exchange unit purchase agreement executed by Basin Water and
Shaw on December 23, 2005, (2005 Purchase Agreement) which
was structured as a $5 million sale of water treatment units
by Basin Water to Shaw in two parts: (1) a sale of three
water treatment systems in 2005 for total consideration of
approximately $2.3 million and (ii) a sale of additional
water treatment systems in 2006 for total consideration of
approximately $2.7 million (subsequently adjusted to $2.5
million).
In settling this dispute, Shaw
relinquishes whatever claims to or rights it may have under
the 2005 Purchase Agreement generally, and in particular to
the ion exchange units that were the subject of the
agreement.
In the transaction, Basin Water
acquired the assets of Shaw’s bioreactor and biofilter
business, which include the design and supply of fluidized
bed, membrane, and suspended carrier bioreactors for the
treatment of groundwater and wastewater streams in
industrial, municipal and federal applications. The business
also includes the design and supply of biofilters for the
treatment of air streams from municipalities and industry
for the removal of odor-causing and other contaminants.
“We believe this transaction will
further enhance our ability to treat organic contaminants in
both the municipal and industrial arenas,” said Basin Water
President and Chief Executive Officer Michael Stark. “By
applying our business model of providing systems along with
long-term service contracts to the bioreactor product lines,
we expect, over time, to add a new growth element to the
process design, project execution and intellectual property
base that makes up the acquired business,”
Mr. Stark said. "Where customers
with installed bioreactors so desire, we expect to provide
them with long-term service contracts that guarantee
performance and costs of controllable elements of operation.
We also expect to provide service options to new customers
going forward."
The acquisition also will bring
to Basin Water a team of approximately 20 experienced and
capable engineers, scientists and design professionals who
will enhance our ability to provide our full line of
cost-effective, technology driven treatment systems to the
market. This team developed the bio-filtration technologies
that we are acquiring. They share our passion for excellence
and commitment to customer service through implementation of
superior technologies."
“In addition, the transaction
will provide Basin Water with a significant presence in the
Northeast via a facility in the Trenton, N.J. area,” Mr.
Stark said.
In addition, Basin Water shall
have the title to and the right to resell the ion exchange
treatment units that are the subject of the 2005 Purchase
Agreement with Shaw. Basin Water can deploy these units very
rapidly to customers whose requirements can be met by those
units, the Company said.
Source:
http://www.basinwater.com/ |
|
|
i
i |
|
Solar Borehole Water Pumps Prove
Viable
 Bowburn,
UK -- Working with a partner, C&A have demonstrated the
feasibility of a new solar powered pumping system under UK
conditions, with an initial installation on an MoD site
which is soon to be followed by a second.
The
initial site has a special combination of magnesium rich
serpentine rocks whose waterlogged soils have led to a
unique range of heath-land habitats with a remarkable array
of rare plants and animals that must be protected for the
benefit of the nation. A guaranteed water supply was
required to provide water for the cattle which graze the
conservation area in the summer months. The cattle are
critical to maintaining the natural habitat and delicate
ecosystem of this conservation area.
Two
30m deep boreholes were sunk in different locations on the
350 hectare site and Sun-Sub solar powered borehole systems
were installed. Due to the site’s remoteness and
sensitivity, laying mains electric cables was not an option
and so the solar powered pumps provide a welcome alternative
to fuel burning engines.
Photovoltaic panels produce electricity from sunlight using
silicon cells, these have no moving parts so are therefore
very reliable. They work well in hot or cold weather. Solar
water pumps are designed to utilize DC electric power from
photovoltaic panels. They must work during low light
conditions at reduced power without stalling or overheating.
Low
volume pumps use positive displacement mechanisms, which
seal water in cavities and force it upward, lift capacity is
maintained even while pumping slowly. These differ from
conventional centrifugal pumps which need to spin rapidly to
work efficiently. A controller or current booster is used in
most solar pumps; this is an electronic device that acts
like an automatic transmission, helping the pump to start
and not stall in weak sunlight.
Compared with windmills, solar pumps are less expensive and
much easier to install and maintain. A GPS tracking array is
used to tilt the panels as the sun moves across the sky;
this increases the water produced by approximately 30%. At
night the panels revert to a horizontal position to reduce
wind resistance.
Storage tanks are generally used as reservoirs to gravity
feed to several troughs. Control can either be carried out
by a float switch situated in the tank or by pressure.
Source:
http://www.capumps.com/
|
|
i
i |
|
RFP : Removing Trace
Organics in Wastewater
 ALEXANDRIA,
VA -- The Water Environment Research Foundation
announced a request for proposals (RFP) for research
that will reduce or remove trace organic compounds from
the liquid wastewater treatment stream. The research
will allow wastewater agencies to apply site-specific
processes in their treatment facilities.
Trace organic compounds
(TOrC) generally encompass endocrine disruptors and
other pharmaceuticals and personal care products. In
this project, researchers will identify the suite of
TOrC they will use as indicator compounds in their
research. Researchers should justify their selection and
demonstrate the ability to reliably analyze these
compounds in wastewater.
The research will inform the
wastewater treatment and the regulatory communities on a
number of fronts. First, it must identify missing
empirical information on the fates of specific TOrC
during conventional wastewater treatment. It must
explain the functional relationships between process
variables and TOrC fate in conventional treatment.
Finally, the research must provide predictive models
relating compound removal efficiency to process
operational variables and compound-specific
physical/chemical parameters.
WERF expects that
first-generation models will be basic, but will seek
model refinement as the scientific community gains more
understanding of the fates of additional TOrC during
wastewater treatment.
Proposals must be received by
5:00 p.m. (EDT), November 11, 2008.
This RFP is one component of
WERF's TOrC research program. The Water Environment
Research Foundation, formed in 1989, is America's
leading independent scientific research organization
dedicated to wastewater and stormwater issues. We have
managed nearly 400 research projects, valued at more
than $85 million.
Go to
http://www.werf.org/
to access the complete request for proposals |
|
|
i
i |
|
|
|
i
i |
|
|
|
i
i |
|
Featured Videos
Share
your videos with everyone - promote your plant, your
product and your company, free.
|
|
|
i
i |
| Help Forum :
Hot Messages from the Help Forum
People post their requests
for help and offer their suggestions to others in our open
forum.
Mr. McCarthy wants help with
high BOD cheese effluent:
Help, at one of our
operations treating cheese production wastewater where we
have anaerobic treatment followed by SBR (with nitrogen
removal), the final effluent COD has been ranging between 20
and 60 mg/l, the final effluent cBOD has been less than 5
mg/l, the final effluent ammonia has been less than 0.5 mg/l
and the final effluent TSS has been less than 10 mg/l, yet
the BOD has been 20 to 40 mg/l.
There seems to be some
interference with the BOD test, that does not impact the
cBOD test. Some have suggested quaternary ammonia compounds
but if they were present in high concentrations they may
impact the anaerobic reactor? Any other suggestions or
similar experiences?
There is no DAF at this
facility. (Click
here to post a reply)
Thanks,
Peter McCarthy
ADI Systems Inc.
Email: pjm@adi.ca
Help Forum:
Share your
expertise with others in our
Help
Forum. |
|
i
i |
|
|
|
|
i
i |
| From the Job
Fair: Coastal Engineer
Needed - Hawaii
PURPOSE/FUNCTION
Design, plan, or perform engineering duties in the
prevention, control, and remediation of environmental health
hazards utilizing various engineering disciplines. Work may
include waste treatment, site remediation, or pollution
control technology.
Duties and responsibilities
will include but not limited to the following:
• Analysis of coastal and oceanographic processes and the
interactions among waves, currents,
sediments, and structures
• Assistance with collection and analysis of field data
• Analytic and numerical modeling of waves, currents, and
sediment transport in open coast, inlet, and
estuarine environments
• Analysis, visualization, and interpretation of geospatial
data, and time-series
• Oral and written communication of analysis and results
REQUIREMENTS
• BS Civil Engineering (Masters a plus)
• 6 + years of relevant experience and project management of
coastal or ocean engineering projects
required.
• Good communication, technical writing, and ability to work
independently and as an integral part of a
project team.
A strong candidate should
have working knowledge of MATLAB , proficient in office
computer applications (AutoCAD, MS Project, Matlab, MathCAD,
Civil 3D, Word, Excel, PowerPoint, etc.), CAD, and/or GIS.
Contact:
jmurphy@adecco-hawaii.com
The Job Fair:
A free
service of Water and Wastewater.com. You can post job
opening for managers, engineers, sales, reps or other
talented people you need. ...Or one can post their resume
for companies who are looking to add talented people to
their staff.
Do you have a position
you need to fill? Visit the Job
Fair. |
|
|
i
i |
| About Us :
Water and Wastewater Newsletter
© 1999-2008 Water and Wastewater.com
Home page: http://www.waterandwastewater.com
Joseph Taylor, Editor
Water and Wastewater Newsletter
3948 South Third Street, No. 121
Jacksonville Beach, FL 32250
Phone: 904-280-4656
Fax: 904-273-1399
Email: jtaylor@waterandwastewater.com
Water and Wastewater
Newsletter is a 100% opt-in e-mail list of information for
the water and wastewater treatment professional. Do
you have company news, a new product, new service or other
information you would like to share with our subscribers?
Please submit articles via e-mail, only to: news@waterandwastewater.com |
|
|
::
Pressure Exchanger cuts
Desalination Costs
::
Basin Water acquires assets
from Shaw
::
Solar Borehole Water Pumps
Prove Viable
::
RFP : Removing Trace Organics
in Wastewater
:: The News Center : More headlines
:: The Water and Wastewater Blog
:: Video Center
:: Help Forum
::
Water and Wastewater Plant
Directory : Featured Plant
:: The Job Fair
:: Top Picks at Amazon.com
:: Ask Tom! Column!
:: 180,000+ visitors in August !
:: Call For Photographs!
:: Subscribe, Unsubscribe
:: Archive Information
:: About Us
|
|
|
|
| Hi Everyone,
WEFTEC Video Interview slots
filled
We would like to thank
everyone who has signed up for video interviews at WEFTEC
Show in Chicago. All our interview slots are filled,
so we will not be able to accept any additional interview
requests.
With over 10,000+ subscribers,
our goal is to provide information
to improve your business by using the resources available on the
Internet.
Thanks,
Joe Taylor, Editor
jtaylor@waterandwastewater.com
|
|
|
|
|
|
|
|
|
Send
a copy of this newsletter
to a friend or associate! |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| This
months Ask Tom! article |
|
|
|
|
Featured
Case History |
|
 |
|
Kruger Case Study : City of Palm Coast, FL
The City of Palm Coast, located on the east coast of
Florida, expanded their existing Wastewater
Treatment Plant (WWTP) to increase capacity to 6.83
MGD due to population growth, as well as add the
production of reclaimed reuse water for use within
the City. The existing facility disposed effluent
wastewater at rapid infiltration basin sites, spray
fields, and a wet weather discharge site....(more) |
More case histories...
|
|
|
|
180,000+ visitors in August ! |
|
|
Banner Advertising
How
can you reach the world's top water and wastewater executives, engineers, managers and service personnel? By
placing a banner ad on the industry's most popular web
site.
Water and Wastewater.com is
your strategic link to the precise audience interested in
your products and services. Both nationally and
internationally. Rates are reasonable - and results are
more than satisfying!
Get your rate card
now! Email
us at
rates@waterandwastewater.com
Click
here for
Advertising Opportunities
|
|
|
|
| Call For
Photographs
This weeks photo
is of a VSEP that is being tested at a major winery as a
wastewater treatment alternative to a "land grabbing"
conventional digester systems. The pilot testing is
evaluating VSEP as a treatment option for barrel wash water,
equipment cleaning solutions and high TDS ground water.
Photo courtesy
Greg Johnson of New Logic Research
Send us
your photos: We would love to have your photo of
a water or wastewater treatment "action shot" for
inclusion on our home page, free of charge. Send your
photograph and description to: news@waterandwastewater.com
|
|
|
|
| This issue of
Water and Wastewater Newsletter was sent to 10,293 water and wastewater treatment professionals at the time of this
mailing.
|
|
|
|
|
To subscribe to
our newsletter enter your email address and click the
"Subscribe Now" button below.
|
|
|
|
|
|
|
|
| To unsubscribe,
click the hyperlink provided at the bottom of this email
|
|
|
|
|
|
|
"Presents
today's best techniques for residuals management...."
"It
is a monumental work, very clear and well written. We needed
this book."
We
Need Your