Filtronics, Inc. Approved by TCEQ for Treatment Technology for Arsenic, Iron and

Filtronics, Inc. of Anaheim, California is pleased to announce they are one of the
first companies to receive approval from the Texas Commission on
Environmental Quality (TCEQ) for their treatment technology for the removal of
arsenic, iron and manganese at the filtration rate of 10 gallons per minute per
square foot.
This high filtration rate is significant for several reasons. Conventional systems
must operate at a much lower rate to achieve comparable results, often 3 to 5
gallons per minute. The benefit is substantial savings in the initial capital investment
for smaller, compact equipment and a very small footprint. Significant
cost savings are realized by the construction and use of smaller facilities and the
increased water production from the high filtration rate with less waste and
handling. The smaller filter size also translates into lower wash water
requirements and further enhances the backwash-to-filtration ratio for a more
efficient system.
The leading environmental agency for the state of Texas issued their approval
early last year. Filtronics has two filtration systems operating very successfully,
continually exceeding the effluent requirements imposed by the Environmental
Protection Agency (EPA) and the TCEQ.
About Filtronics, Inc.
Filtronics, Inc. is a leading manufacturer of municipal and industrial water
treatment systems. Founded in 1974, the internationally acclaimed company with
headquarters in Anaheim, California has been in the forefront of water
purification technology for nearly 40 years. An authorized dealer of NXT-2Ò
media, along with their full product line of ElectromediaÒ products, the company
is well known as successful arsenic, iron and manganese removal specialists
producing the highest quality environmentally friendly systems using the best
available technology.
Contact: Filtronics, Inc.

NXT-2 is highly stable and extends bed volumes.

NXT-2 is a patented media which provides users with the lowest treatment costs per thousand gallons for adsorption technology. This is due to the high surface area of the media, which is often times greater than 250 m2/gram.  High surface area increases the medias capacity for arsenic adsorption and extends bed volumes.

In addition to the high surface area, NXT-2 is stable. Once the arsenic is bound to the media, NXT-2 will not release the bound arsenic in the event of pH upset. Release or “spiking” occurs when the pH of the water exceeds the zeta point pH of the media. NXT-2 has a high zeta point pH of 9.5 while many iron based medias have a zeta point of 7.8 pH. This stability reduces the potential to distribute water which has high arsenic concentrations  in excess of the EPA standard, due to loss of pH control.

For your smaller arsenic removal projects, NXT-2 is a cost-effective solution over other leading adsorptive media.

Learn more by downloading our technical bulletin here:

Arsenic Basic Process Assessment Guide

The concentraion of Iron in source water can be one of the main drivers in technology selection, therefore the presnece of iron will play a prominent role in technology selection and the treatability of a given water source.  The most effective arsenic removal processes available are iron-based treatment technologies such as chemical coagulation/filtration with iron salts and adsorptive media with iron-based products.  These methods are particularly effective in removing arsenic because iron has a strong affinity to adsorb arsenic.  Because of the unique role iron plays in facilitating arsenic removal, the level of iron in the source water is a primary consideration in the selection of an optimal treatment approach.

Arsenic to Iron ratio chart

The above chart shows a detailed description of the range of iron concentrations relative to arsenic concentrations and how the Fe:As ration could influence the treatment technology chosen.

  • HIGH iron levels (>0.3 mg/L).  HIGH Fe:As ratio (>20:1)
    Iron removal processes can be used to promote arsenic removal from drinking water via adsorption and co-precipitation.  Source waters with this ratio are potential candidates for arsenic removal by iron removal.  (A)
  • MODERATE iron levels (>0.3 mg/L). LOW Fe:As ratio (<20:1)
    If the iron to arsenic ratio in the source water is less than 20:1, then a modified treatment process such as coagulation/filtration with the addition of iron salts should be considered. (B)
  • LOW iron levels (<0.3 mg/L).
    Technologies such as adsorptive media, coagulation/filtration, and ion exchange are best suited for sites with relatively low iron levels in their source waters at less than 300 ug/L, the secondary MCL for iron. (C)

This process selection is very basic and the removal capacities depicted are meant to be a general rule of thumb.  It is important to run a General Mineral Analysis on your water to determine the best treatment approach.

Filtronics announces new EM-Mini low flow system for the removal of arsenic, iron, manganese and other metals.

Filtronics EM-mini SystemFiltronics EM-mini packaged water treatment systems are factory assembled, fully self-contained and specifically designed for applications 100 gpm or less. Coming in standard configurations, the EM-mini features a smaller footprint at the lowest capital cost in the industry making them perfect for budget minded small communities, schools, commercial or industrial facilites needinga simple, economical solution. To optimize performance, the EM-mini utilizes our NSF certified Electromedia® which allows for higher filtration rates, minimal chemical dosage, and never needs replacement.

Contact your local Filtronics Rep to learn more.

Envirowash® - Filtronics Efficient Backwash/Reclaim System

Among the key features to any of the Filtronics Electromedia® filters is the efficient use of water for backwash. For a typical application:

A. Our Electromedia filters only require a four minute backwash.
B. The backwash to filtration ratio is less than one percent.
C. Recover after backwash is short, generally five minutes.

With a raw water turbidity of 15 NTU or less, we conservatively estimate the interval filter run time duration to be 18 hours. The backwash to filtration ratio for a typical 750 gpm application is:

¬ 750 gpm x 18 hours x 60 minutes = 810,000 gallons produced.

¬ The backwash cycle lasts four minutes at 1800 gpm and surface wash lasts one minute at 180 gpm. (The backwash rate assumes 20 degrees Centigrade temperature of the source water).

¬ The total volume of water used for surface wash and backwash total 7,380 gallons.

¬ The backwash to filtration ratio is 7380/810,000 = 0.009 or 0.9% for a 99+% efficiency.

Filtronics systems have a very short recovery after backwash. The filter system produces a filtrate of less than 0.2 NTU in only five minutes after a backwash. Thus, not only adding to the efficiency of the system but producing a high water quality quickly to the potable water system.

Assuring a two minute rinse to waste water cycle, the overall efficiency is 98.9%.

To further reduce the amount of water lost, many applications include our highly efficient Envirowash®, a backwash water reclaim system to recover more than 99.999% of the water used for backwash. That’s water that can be sold to the customer, meeting the same effluent requirements as the raw source.

This video shows a 22MGD plant with a four minute backwash. When you view the video, think about the sheer volume of water saved by such a short backwash cycle. As stated above, this water can be reclaimed and sold to the customer. Efficient AND Revenue generating! :)

Naturally Occurring Arsenic Contaminates Groundwater in Many U.S. Locales

Natural Arsenic Contaminates WaterArsenic, a chemical element toxic to humans, can be found in relative abundance in many underground rock formations around the world. Because of this fact of geology, arsenic in groundwater supplies that are used as sources of drinking water is a common problem.

Consumption of arsenic can cause or contribute to a variety of serious long-term health problems – cancers of the skin, lungs and bladder, cardiovascular disease and peripheral neuropathy, for example. High levels of arsenic contamination can even cause acute poisoning resulting in death. Needless to say, wherever naturally occurring arsenic leaches into a local water supply, effective decontamination is essential to protect human health.

In the United States, groundwater containing unacceptable levels of arsenic is more common in the western half of the country. Localized arsenic hotspots can occur anywhere – high levels of arsenic have been found in wells in Appalachia, and relatively high levels of arsenic occur in groundwater in the state of Maine – but the areas of greatest concern are west of the Mississippi River. Analyses of groundwater in many areas of Southern California, Nevada, Arizona, Montana, the Texas Panhandle, western Minnesota, western Nebraska and the lower Rio Grande Valley all have shown particularly high levels of arsenic.

U.S. standards for the allowable amount of arsenic in drinking water, known as the maximum containment level or MCL, changed considerably in the mid-2000s. The U.S. Public Health Service originally set a limit for arsenic of 50 parts per billion (ppb) in 1942. Almost 60 years later, the Environmental Protection Agency proposed lowering the MCL to just 10 ppb. After much debate, this new standard went into effect in January 2006. More than a third of the existing supply wells in California and Arizona at the time produced water that did not comply with the 10 ppb standard.

The EPA regulations apply only to public water supplies, but owners of private wells should also be concerned about dangerously high concentrations of arsenic in their drinking water. Fortunately, water can be treated to reduce to achieve arsenic levels of well under 10 ppb.

For reducing arsenic in drinking water, Filtronics offers Electromedia® I, a filtration system with a proprietary filter medium that can bring arsenic concentrations down below the detectable level of 2 ppb. Electromedia® I can also filter out iron, manganese, radium and other heavy metals. Designed for flows from 100 to 20,000+ gpm, our EM-I systems have the lowest annual operating costs compared to any competing system. To find out more about a water treatment solution that will serve your precise needs at the lowest possible cost, call the experts at Filtronics at (714) 630-5040.