Arsenic Treatment Options for the Southwest

While high concentrations of arsenic are found mostly in the Western region of the United States, parts of the Midwest and New England show levels of arsenic
that exceed the newly approved U.S. Environmental Protection Agency (EPA) standard of 10 parts per billion (ppb). Individuals not willing to wait for their water system's compliance with the arsenic standard currently are looking for treatment systems to use in their homes. POU and even point-of-entry (POE) treatment systems are an attractive solution for these individuals. The process should begin with a basic understanding of arsenic contamination and the element's chemistry, a complete water quality analysis of the application-specific water and the knowledge of available technologies.

Activation Date: 
January 31, 2003
Files: 
Issue Reference: 
Legacy
Legacy ID: 
13655

Dried Up: Raisin Producer's New Process Cuts Wastewater and Odors

Thanks to a new membrane filtration system, National Raisin Company, Fowler, Calif., not only has been able to cut its wastewater costs, but it also has opened up a potentially lucrative source of additional income.

About The Author: 

David Pearson is the general manager of PCI Membranes, Inc., Cincinnati, OH.

Activation Date: 
January 9, 2003
Files: 
Legacy
Legacy ID: 
13505

A New Option in Valve Actuators Strengthens Control of Filtering Operations

Water works engineers are now turning to a new generation of pneumatic valve actuators that are capable of executing the instructions of electronic control systems with the necessary precision to accurately control effluent flow. Surprisingly simple but rugged in construction, this new breed of actuators also is meeting the need to reduce downtime, as some of the first ones to debut in 1981 are still in operation without needing a spare (new) part.

Deck: 

Control Systems

About The Author: 

Information for this story was provided by K-Tork, Dallas, Texas.

Activation Date: 
January 9, 2003
Files: 
Legacy
Legacy ID: 
13504

Reverse Osmosis - Anion-Filtration Water Plant Run by a Single Automation Platform with Fieldbus Communications

A new 3.0 mgd water treatment plant on North Carolina's Cape Hatteras is believed to be the first in the United States to apply Foundation fieldbus for device-level control communications. The plant, built by the Dare County Water Department near the famous Cape Hatteras Lighthouse, has been operating without a problem since startup more than two years ago. Fieldbus has been widely applied in all process industries including electric power generation, an industry also cautious to adapt new technology.

About The Author: 

Robert Oreskovich is the director of the Dare County Water Department, Manteo, N.C.
John Contestable is the Frisco plant superintendent of the Dare County Water Department, Buxton, N.C.
Ken Flatt is the water systems analyses superintendent of the Dare County Water Department, Buxton, N.C.
Ian C. Watson, P.E., is president of RosTek Associates, Tampa, Fla., and the consulting engineer for the Dare County Water Department.
John Rifleman is a control systems engineer for Water Equipment Technologies, Inc., West Palm Beach, Fla. He was the installation superintendent for the reverse osmosis system as well as the control systems integrator for the single automation platform.

Activation Date: 
January 9, 2003
Files: 
Legacy
Legacy ID: 
13501

ETV Testing Verifies Membrane Filtration Plant Treats Surface Water, Meets D/DBP Rule

A study published as part of the EPA's Environmental Technology Verification (ETV) Program verifies the performance of a Fyne Process membrane filtration plant tested on high organic-laden surface water in Barrow, Ark. The plant was able to remove significant levels of organics--precursors to disinfection byproducts such as trihalomethanes (THM) and haloacetic acids (HAA)--producing water that easily met the disinfection byproduct standards set by the EPA's stringent Stage 1 D/DBP Rule.

About The Author: 

PCI Membrane Systems offers complete water treatment packages including containerized plants, and also can provide remote monitoring of system performance. In addition to tubular membranes for liquids containing suspended or colloidal materials, PCI also supplies spiral-wound or hollow fiber membranes for clean solutions and ceramic membranes for high chemical compatibility and thermal resistance.

Activation Date: 
November 27, 2002
Files: 
Legacy
Legacy ID: 
13439

Filter Housing Design Fits Height, Seismic Stress Needs

Occasionally, height is an issue in a filtration system's housing design. A few years ago, Eden Equipment Company of Huntington Beach, Calif., was approached by a client with just this issue. Due to the client's specific requirements for their system, Eden's original ideas and drawings for this horizontal vessel needed to be redesigned. In addition to the height restrictions on their system, they also needed a design that could withstand a Seismic Zone 4 earthquake.

About The Author: 

For further information, phone Eden Equipment Company at 714-842-8181.

Activation Date: 
November 12, 2002
Legacy
Legacy ID: 
13426

Australian Microfiltration System is World's Largest For Potable Water Treatment

The AQUA 2000 Project is a build-own-operate-transfer (BOOT)
project, delivered and operated by Vivendi Water Australia. It includes the
construction and operation for 25 years of a water treatment scheme for the
Coliban Water Authority in Victoria, located in southeastern Australia.

Deck: 

Products in Action

About The Author: 

For more information, phone USFilter Memcor at 800-547-1202.

Activation Date: 
November 12, 2002
Legacy
Legacy ID: 
13423

Desalination in America

On average there are 50 to 75 significant desalination projects per year in the United States with an average capacity of approximately 1 million gallons per day. The majority of these projects utilize membrane processes such as nanofiltration (NF) or reverse osmosis (RO).

Deck: 

Technology Update

About The Author: 

John B. Tonner is the vice president and senior consultant - BSME 1985 for Water Consultants International. He has more than 17years of water technology experience with particular emphasis on advanced water treatment analysis, desalination process, operational analysis and training. He may be reached at jtonner@WaterCI.com; www.WaterCI.com.

Activation Date: 
October 29, 2002
Files: 
Issue Reference: 
Legacy
Legacy ID: 
13402

Integrated Technology Simplifies Dewatering Process at Two Municipal STPs

In the late 1990s, one western Pennsylvania sewage treatment plant (STP) sought to process Class B biosolids on-site, eliminating the expense of hauling liquid off-site and significantly decreasing associated labor costs. At the same time, the plant needed to achieve higher cake solids and provide strict odor control. In addition, the selected equipment also had to be able to greatly enhance process efficiencies at not just the one plant, but its sister facility as well. Fortunately, USFilter offered a fairly simple solution to meet the STP's seemingly complex needs.

Deck: 

Robert W. Mau and Dean Clemons

About The Author: 

Robert W. (Bob) Mau is USFilter's municipal wastewater dewatering systems technical sales manager for the eastern United States. Mau joined USFilter in 1993 as southeast technical sales manager for both municipal and industrial applications. He has spent more than 30 years in the liquid filtration and sludge dewatering industry, and has held positions in product development, site testing, direct sales and sales management. Mau has a bachelor's degree in mechanical engineering from General Motors Institute and a MBA from Baldwin Wallace College.
Dean Clemons is the operations manager for the West Mifflin Sanitary Sewer Municipal Authority. During his 32 years with the WMSSMA, Clemons has worked as plant operator at the Thompson Run and New England plants, plant mechanic, and belt filter press operator. He is certified by the State of Pennsylvania Department of Environmental Protection.

Activation Date: 
October 8, 2002
Legacy
Legacy ID: 
13375

Small Site Dictates Stormwater Treatment Solution in Mich. Redevelopment

Ann Arbor, a densely populated university town of 180,000, has been seeing an increase in urban redevelopment pressure in recent years as developable land has become scarce and land values have risen. The city of Ann Arbor has worked closely with the County Drain Commissioner’s office to use this redevelopment as an opportunity to improve the quality of stormwater flowing into the county drains.

Activation Date: 
July 10, 2002
Legacy
Legacy ID: 
13204