H2S Control and Removal

Complete removal of H2S can best be accomplished by oxidation by chlorine; conversion of chlorine, resulting colloidal sulfur and polysulfides by metabisulfite or sulfur dioxide to thiosulfates, and then converting to sulfates by rechlorination.

Filtronics series of reaction vessels takes advantage of this mechanism by insuring break point chlorination and carrying a 0.5 mg/l free chlorine residual to the distribution system for disinfection and sulfur bacteria control. The reaction is begun in the first reaction vessel where all the forms of sulfur are produced. Between the first and second reaction vessel, sulfite is added where the thiosulfate is then formed. The thiosulfate oxidizes very rapidly producing a sulfate and a sulfite. Thus another sulfite is available to continue the conversion of any sulfur or polysulfides. By going to breakpoint and carrying a free residual through the system, re-chlorination is not necessary. 

For more information, check out our H2S Technical Bulletin at http://bit.ly/1cidoY4

 

NXT-2 Media 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.

Learn more by downloading our technical bulletin here:  http://www.filtronics.com/literature/technical/media/nxt-2-technical.pdf

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:  http://www.filtronics.com/literature/technical/media/nxt-2-technical.pdf

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 is excited to announce TD Rooke as new Canadian Representative

Filtronics Inc., a leading municipal and industrial water treatment solutions company, is delighted to have TD Rooke Associates, Ltd. as one of their new sales representatives. TD Rooke Associates, Ltd. recently joined The Filtronics representative team and is managing the Provence of Ontario, Canada.

Stephen Smee, Vice President of operations for Filtronics says, “TD Rooke Associates, values customer support which aligns perfectly with Filtronics Inc., core beliefs. We are very happy to have them working with us to create a strong representative team in the Canadian industrial and municipal market.”

TD Rooke Associates, Ltd. is one of the leading sales representatives in Canada. They provide quality engineered products to the industry that offer excellent value to the customer by providing prompt, knowledgeable, and reliable support. They are constantly expanding through the introduction of innovative concepts and products.

Filtronics is widely known as a technological leader in the municipal and industrial water treatment industry throughout the United States, Canada and Mexico. They have a comprehensive line of products featuring their ElectromediaÒ and EnvirowashÒ backwash reclaim systems.  Filtronics is also a supplier of NXT-2 media, and GE Water & Process Technologies Reverse Osmosis Water Treatment Systems. Filtronics focus has always been to give their customers the best service possible. For more information on Filtronics and their extensive water treatment solutions please visit www.filtronics.com or call (714) 630-5040.

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Filtronics signs on Marshall Bond Pumps as Rep for Northern Illinois.

Anaheim, CA:  Filtronics Inc., a leading municipal and industrial water treatment solutions company, is overjoyed to have Marshall Bond Pumps Inc. as one of their outstanding sales representatives for Northern Illinois. Marshall Bond Pumps Inc. officially joined  the Filtronics representative team in November of 2012. Stephen Smee, Vice President of operations for Filtronics says, “We are creating an unstoppable representative team in the municipal and industrial market and are excited to bring Marshall Bond on board. Not only does Marshall Bond bring exceptional technical knowledge but they provide great customer service which aligns perfectly with the Filtronics model.”

Marshall Bond Pumps Inc. was founded in 1965 by William Marshall and George Bond and specializes in manufacturing engineered pumps and process solutions. They offer a wide range of pumps, clarifiers, bar screens, blowers, processes and many other products to create unique solutions to customers in the municipal and industrial market.

Filtronics is widely known as a technological leader in the municipal and industrial water treatment industry throughout the United States, Canada and Mexico. They have a comprehensive line of products featuring their Electromedia and Envirowash backwash reclaim systems. Filtronics is also a supplier of NXT-2 media, and GE Water & Process Technologies Reverse Osmosis Water Treatment Systems. Filtronics always places great effort in giving their customers the best service possible. For more information on Filtronics and their extensive water treatment solutions please visit www.filtronics.com or call (714) 630-5040.