Click here

Vol. 13 - No. 427  
February 7, 2011  
ISSN: 1533-449X  
Copyright 1999-2010  

 In the News
 This issue

Natgun and DYK Merge to form DN Tanks

Wakefield, MA and El Cajon, CA -- Natgun Corporation of Wakefield, MA and DYK Incorporated of El Cajon, CA jointly announced the merger of their companies on January 4, 2011, and the formation of their new parent company “DN Tanks, Inc.”.

Both companies specialize in the design and construction of prestressed concrete storage tanks used for potable water, waste water, chilled water, and other liquids. The merger of the two companies, with over 130 years of combined experience, creates the largest producer of wire and strand-wound prestressed concrete tanks in the world.

Initially, Natgun and DYK will operate under their existing names, as divisions of DN Tanks. As the integration process takes place, they will evolve into a single operating company. A four-member Board of Directors, comprised of Charles Crowley, William Hendrickson, William Crowley, and David Gourley, will lead DN Tanks, Inc. Charles Crowley and William Hendrickson will serve as Co-CEO’s.

Both DYK and Natgun design and construct prestressed concrete tanks in accordance with the American Water Works Association Standard D110. Each company brings specialized skills to meet varying project requirements. While there are some differences in the methods of tank construction, both companies share a commitment to quality, durability, and to delivering long-term value for their customers. The merger of the two companies into DN Tanks results in expanded construction capacity, unmatched technical expertise, and proficiency in multiple types of proven tank designs to provide customized liquid storage solutions for their customers.

“Our vision for the merger is to leverage the strengths of each company to become more efficient, and to increase construction capacity. That results in expanded opportunity for utilities and industries to enjoy the benefits of prestressed concrete tanks”, said DN Tanks Co-CEO Charles Crowley. He also noted opportunity for employees. “By combining our two organizations, we will create an environment that will allow dedicated and talented employees from DYK and Natgun to thrive in the future.”

William Hendrickson, DN Tanks Co-CEO stated, “The combination of DYK and Natgun into the newly formed DN Tanks brings together two very strong organizations. With our combined resources, we will expand our ability to deliver the best product and service to our clients. As a combined company, DN Tanks will excel in terms of solving problems, creating solutions, and delivering well-managed, conservatively designed, safe projects on time and within budget.”

With Operations Centers in Massachusetts, Texas, and California, as well as multiple Regional Offices, DN Tanks will serve clients nationally and internationally.




This newsletter is sponsored by:

Click Here!



WaterRF Funds Perchlorate Treatment Research

Denver, CO -- The Water Research Foundation (WaterRF) is funding a special project to assess the current state of science related to perchlorate treatment technologies and regulations in the United States. The Foundation’s new research anticipates new regulations from the U.S. Environmental Protection Agency regulating perchlorate in drinking water.

Perchlorate is a chemical primarily used in the manufacturing of explosives and rocket propellants for the defense and aerospace industries. Low levels of ammonium perchlorate have also been found to occur naturally in the environment. Perchlorate contamination is becoming a widespread concern as sources of such contamination continue to be identified and more sensitive analytical methods are developed that can detect this compound in soil, groundwater, and surface water.

WaterRF’s Rapid Response Project titled, “State of Science on Perchlorate Treatment Technologies and Regulations,” will be conducted by Dr. Geno Lehman, P.E. and Dr. Arun Subramani, both from the MWH Americas, Inc. The study is scheduled to be completed in April 2011. Once finalized, WaterRF will host two informational workshops for subscribers.

“It is crucial that EPA’s new regulations pertaining to perchlorate be based on sound science,” said Rob Renner, Executive Director of WaterRF. “The research we are initiating will help establish a solid benchmark of the current state of the science and existing regulations from which EPA and other interested parties can make informed decisions.”




Siemens’ Disc Filters Increase Capacity at Ohio WWTP

Warrendale, PA -- The Metropolitan Sewer District of Greater Cincinnati (Ohio, USA) will be installing four Forty-X disc filters from Siemens Water Technologies at its Sycamore Creek Wastewater Treatment Plant. Part of a wastewater treatment improvement project, the filters will allow the plant to increase design flow capacity from 6 to 9 mgd (22,712 to 34,069 m3/d), with a peak flow capacity of 18 mgd (68,137 m3/d). The project also changes the plant’s process from conventional activated sludge treatment to advanced biological phosphorus removal.

The disc filters will replace the Sycamore Creek plant’s current sand filtration system, which has reached its usefulness due to increased flow volumes. Three of the disc filters will be operational, with one remaining in stand-by mode. The Forty-X disc filters’ small footprint and versatile hydraulic capabilities will allow them to be easily retrofitted into the sand filters’ existing concrete tankage, using only four of the eight filter concrete basins to meet the increased plant capacity.

The Forty-X disc filter’s pleated filter media panel design provides 40% more filtration area, compared to flat panel designs. The inside-out filtration design offers many distinct advantages over the outside-in filtration technology. For example, all mechanical and functional hardware as well as the filtration panels are accessible from the top of the filter without draining the filter tank.

The filter panel’s spoke (housing) design discourages floatable materials from catching and impeding water flow through the filter. Additionally, for safety and convenience, permanently mounted sliding covers allow operators easy access to all the filter components as well as keeping blowing debris out of the tank and deterring algae growth within the filter tank.



Innovative Biogas Solution for Alaskan WWTP

Weston, MA -- A year ago, Palmer, Alaska, faced a problem common to thousands of towns and cities: its aging 3-lagoon wastewater treatment plant was failing—and faced an estimated $60 million price tag for upgrades. Today, Palmer’s treatment plant is on track to treat more wastewater with less energy, and even generate power—without expanding the facility’s size or paying staggering upgrade costs.

“We’re going to significantly reduce capital costs,” says Palmer’s Public Works Director Carter Cole. “But this has so many other implications. We’re taking the waste out of wastewater.”

The town contracted wastewater system consulting firm, Ecological Engineering Group (EEG), which designed a phased solution to optimize the performance of the existing lagoons by adding floating insulation (Phase 1) and injecting free waste heat from a combined heat and power plant fueled with biogas from an anaerobic digester (Phase 2). The digester will use organic wastes such as animal manures, garbage and sewage sludge as feedstock to produce methane to power the entire plant — and sell excess power to reduce the town’s utility rates through energy recovery.

These low-cost additions to the wastewater treatment facility, funded by the American Recovery and Reinvestment Act, boost natural processes to get more and better treatment in a smaller space, stabilizing the town’s utility rates. A second part of phase 2 will collect and re-inject the waste heat from a proposed natural gas fueled electric power plant into the lagoons, allowing even more wastewater to be treated in the same space. The current 1 million-gallon-per-day (gpd) plant will increase in capacity to 8 million gpd simply by adding sufficient heat to the influent to maintain an optimum environment for microbial growth and reproduction. The result will be cleaner water, reduced operating costs, and increased energy efficiency and production.

“Ecological Engineering Group is the front-runner in this field,” Cole says. “No other firm came close to meeting our needs. Other firms didn’t want to even consider this approach. They wanted to sell us an expensive new treatment plant. EEG was the only one that gave us accurate information about what was going on in the treatment works and what could be done to solve our problems without starting over, eliminating a $60 million-dollar upgrade cost.”

The principle behind the design is a patent-pending EEG approach known as the Del Porto Q10 System. “Q10” refers to the biological principle that warming a metabolic process by 10 degrees Centigrade will boost the rate of activity by a factor of two. For Palmer, it means doubling the amount of treatment in the lagoon for every ten degrees rise in temperature. The result is treating more wastewater to a higher standard - producing cleaner discharges to surface waters and creating opportunities for water reuse.

“This has huge potential for cities and the private sector, “according to Cole, “it shows that wastewater utilities can be self-sufficient for costs and energy, and even serve as generators of significant volumes of clean energy. What we learned in Palmer should go statewide – the energy in wastewater is an untapped resource, the EEG approach simply makes economic and ecological sense.”




The News Center : More headlines
EPA Plans Scientific Assessment of Alaskan Watershed
Bristol Bay, Alaska is an important source of wild Pacific salmon for commercial, recreational, and subsistence users.

Visalia Increases Use of Recycled Water with GE
Visalia's upgraded plant will feature GE’s membrane bioreactor (MBR) technology and will be the largest MBR plant in California.
Clark County Solids Dewatering Facility Wins Award
CH2M HILL designed facility earns praise from Southwest Contractor and the American Public Works Association-Nevada Section.

Click here to visit the News Center...



Water and Wastewater Blog
Don Dunnington, Moderator
The 21st Century Arrives on the Internet
"...since we're in the Internet Age, and things happen faster in Internet time, the 21st century's Next Age, whatever we call it, is likely to arrive sooner than expected."
Why My Holiday Gift List Starts with "i"
"People have asked me what gifts are on my short list for those wanting the latest in technology. The short answer is anything that starts with "i" as in iPhone and iPad..."
How Talent Drives Success for Organizations that Follow "Third Path"
"John Hagel III had just 10 minutes to tell us how he's found a "third path" to growing an organization's success..."

..enter the Water and Wastewater Blog



 Video Center : Featured Videos

Share your water and wastewater treatment videos with everyone - promote your plant, your product and your company.  Get you video featured in our newsletter, FREE.

PHI Wastewater Mixing Demonstration

Bay 101 : Wastewater Treatment Plants

New Hybrid Aeration Technology Saves 30% Energy In WWTP

 ...see your company video featured, here in our newsletter!

Upload your company videos here



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. Jamil needs help with oily water:

I have a requirement of a client that needs to use disc oil to be added upstream the API, in order to remove oil and sediment.

The question is any one knows more info about both disc oil & API (even suppliers might work), What will be the efficiency for removing oil?

Dania Jamil
Veolia Water
Click here to post a reply)


Help Forum:  Share your expertise with others in our Help Forum.



 Water and Wastewater Plant Directory - Featured Plant

Ashland Water Treatment Plant
Ashland, Kentucky

Maximum of 15.5 MGD using Actiflo and rapid sand gravity filters...(Click here to read more...)


Click here to add your plant to our directory:  Water and Wastewater Plants Directory



From the Job Fair:

We have a number of job openings on the Job Fair, here are just a few of them we would like to share with you.  If you know someone in need, please forward our newsletter to them, so they can check on a job that might suit them.

Help Someone to Find a Job - Today!

New Openings:

Industrial Wastewater Facility Manager - Class A

Waste Water Treatment Plant Operator - Bermuda

Western United States Regional Sales Manager

Estimator needed for wastewater plant division

Water and Wastewater operator opening

Wastewater Process Engineer - Georgia

For job more listings, and we have lots of them, visit our Job Fair.

The Job Fair:  A free service of Water and  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.



About Us : Water and Wastewater Newsletter

© 1999-2010 Water and
Home page:

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


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:

:: Natgun and DYK Merge to form
   DN Tanks

:: WaterRF Funds Perchlorate
   Treatment Research

Siemens’ Disc Filters Increase
   Capacity at Ohio WWTP

:: Innovative Biogas Solution for
   Alaskan WWTP

:: 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
:: Ask Tom! Column!
:: 203,000+ visitors in January !
:: Call For Photographs!
:: Subscribe, Unsubscribe
:: Archive Information
:: About Us
 From the editor
Hi Everyone,

With over 13,000+ subscribers, our goal is to provide information to improve your business by using the resources available on the Internet.

Joe Taylor, Editor


 On the web
 Tell a friend

Send a copy of this newsletter
to a friend or associate!

 From the Reading Room
Click here "Covers sampling methods and practices; manual and automatic sampling; equipment and flow devices."

Wastewater Sampling for Process and Quality Control (Manual of Practice)
by: Water Environment Federation, Hardcover


Click here " of the finest books about facilities systems I have ever found."

Facility Piping Systems Handbook
by Michael Frankel
Hardcover, 1200 pages


Click here stars-5-0.gif (430 bytes)"It is a monumental work, very clear and well written. We needed this book."

Wastewater Engineering:
Treatment & Reuse

by George Tchobanoglous, Metcalf & Eddy, et al, Hardcover, 1848 pages


 More books and journals

Find more books online in our Reading Room.

Analyzers & Sampling
Air Quality Control
AWWA-WEF Publications
Conveying & Feeding
Dewatering & Filtration
EIT & PE Exam Prep
Business & Internet
Operator Training and Certification
Piping, Valves & Distribution
Pumps & Pumping
Water Treatment
Wastewater Treatment
Amazon Best Seller's

New! - Trade Journals & Magazines


 This months Ask Tom! article

Water & Wastewater – Liquid Tank Selection

In liquid storage containment, quality and value drives today’s tank selection process. With advances in fabrication technologies, engineering design, coating processes and field construction techniques, some storage products utilized in the past have become outdated, while other products have pushed to the “front of the line” in product development and field performance...(click here for more)


We Need Your
Guest Articles!

Do you have an area of expertise in water and wastewater treatment, have you solved a difficult problem? Share your knowledge with others and promote yourself too, by contributing an article to the Ask Tom! Column.  For more information, please contact Tom Keenan.

Click here for past
Ask Tom! Archived Articles


 Featured Case History

Taskmaster Grinder Solves String Problem

Essilor Labs of America, Omega Optical Laboratory in Dallas, Texas specializes in the production of state-of-the-art ophthalmic lenses. One of the products produced in the laboratory is a prescription lens composed of a polycarbonate material. The lens blank is generated using specialized CNC machinery. During the generating process, the machine sprays water based coolant on the lens to remove the waste material...(more)

More case histories...

 203,000+ visitors in January!
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 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

Click here for
Advertising Opportunities


 Action shots wanted!
Call For Photographs

This week's photo is of a TecTank digester being erected at a wastewater treatment plant. Columbian TecTank has delivered over 150,000 tanks to hundreds of different applications in over 125 different countries around the world.

Photo courtesy of Declan McLaughlin of CST StorageColumbian-TecTank.


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:


This issue of Water and Wastewater Newsletter was sent to 13,464 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.

Enter your email address


 Read past issues
To read past issues, visit our Newsletter Archive.


To unsubscribe, click the hyperlink provided at the bottom of this email