Multipure is the Leader in Solid Carbon Block Water Filter Technology
The Effectiveness of Multipure’s Solid Carbon Block Filters
Drinking water pollution comes from many sources. Surface water can become contaminated with agricultural runoff, community landfills, and hazardous waste from manufacturing byproducts. Groundwater can become contaminated from gasoline and MTBE leaks from underground storage tanks, or from the injection of hazardous waste into deep wells. Significant growth of the drinking water treatment industry can be attributed to the consumer demand for products that can 1) protect them from potentially harmful contaminants in their drinking water, and 2) improve the aesthetics of their drinking water.
The effectiveness of any drinking water treatment device is measured by the performance of its filter. A close review of drinking water treatment unit certifications shows that Solid Carbon Block filters are the most effective for reducing a wide range of contaminants, including those that may be found in groundwater. Certain drinking water treatment units utilizing Solid Carbon Block filters have been tested and certified to reduce upwards of 65 contaminants.
Solid carbon block filter technology was developed by Multipure in the early 1970s for the purpose of treating water contaminants for health and aesthetic reasons. This technology combines mechanical filtration, chemical reaction, and physical adsorption into a single device to reduce a broad spectrum of harmful contaminants.
Activated carbon is the primary raw material used in Solid Carbon Block filters. These activated carbons are effective in reducing disinfection by-products (DBPs), volatile organic compounds (VOCs), PCBs, MTBE, and other contaminants.
Technological Advantages. As evidenced by independent laboratory testing and the certification of Solid Carbon Block filters, Multipure has been successful in developing the technology to produce filters that provide greater chemical adsorption and mechanical filtration. Materials are formed into a densely compacted Solid Carbon Block; compression enhances the kinetics of the filter and provides performance that cannot be achieved with granular activated carbon (GAC) filters. Compacted Solid Carbon Block filters have a large surface area to better facilitate adsorption. With a Solid Carbon Block, the water contact time is longer and provides for greater adsorption of many different chemicals, including pesticides, herbicides, and certain heavy metals. A close review of product listings confirms that Multipure’s Drinking Water Systems are among the few that have been certified to reduce PCBs – a particularly difficult contaminant to reduce.
In addition, the densely compacted carbon block mechanically filters particles down to 0.5 microns, including Giardia and Cryptosporidium, asbestos, turbidity, and particulates. Multipure’s filter design also incorporates a pre-filter to remove large particles and prevent premature clogging. Because Multipure’s Solid Carbon Block filters are exceptionally uniform, they don’t allow channeling or bypass – drawbacks inherent to GAC filters.
Filter capacity varies depending on the density and size of the filter. The activated carbons and their amount used by Multipure determines the capacity of the water filters. Capacity ratings apply to the chemical adsorption capabilities of the carbon and specialized filter media – carbon with a high surface area allows for longer life and higher adsorption capacity. Capacity ratings for Multipure Drinking Water Systems range from 600 gallons to 1200 gallons, depending on the model.
Capacity claims are not applicable to contaminants reduced by mechanical filtration, because of the broad variations in the physical matter potentially present in the drinking water. Multipure’s Solid Carbon Block filter is engineered so that contaminants removed by mechanical filtration cause the flow rate to decrease and the filters to narrow, thus offering protection to the consumer from Giardia, Cryptosporidium and other contaminants with a specific physical size.
Summary. Solid carbon block filters effectively treat contaminants such as lead, chlorine, benzene, MTBE, chloramines, and PCBs. Solid carbon block filters will likely prove capable of significantly reducing contaminants that may be found in drinking water supplies in the future, such as antibiotics, drugs, and other personal care products. The effectiveness of Solid Carbon Block filters in treating a broad spectrum of contaminants of aesthetic as well as health concern makes it the bona fide technology of choice consumers throughout the country.
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More About How the Multipure® Solid Carbon Filter Works
Multipure® Drinking Water Systems, featuring Multipure’s unique Solid Carbon Block filter technology, are designed to provide superior performance, health safety, and convenience. The replaceable filter cartridge combines three different approaches to filtration to produce the most effective water filter with proven performance. Multipure utilizes only the highest quality, FDA-approved food-grade materials that are formulated to provide the cleanest, freshest drinking water without removing healthy, naturally occurring minerals.
Multipure® Solid Carbon Block filters combine mechanical filtration, electrokinetic adsorption, and physical adsorption to provide the most effective contaminant reduction possible. Water enters the filter through a graded density pre-filter, which acquires a positive molecular charge in a moving stream of water. Since most colloidal contaminants exhibit a negative charge in solution, the media fibers electrokinetically adsorb charged colloidal particles too small for removal by mechanical straining. The pre-filter media combines the technology of mechanical straining, for the removal and retention of solid and semi-solid contaminants that can cause premature clogging, with electrokinetic adsorption for the reduction of colloidal contaminants down to the submicron (0.5 micron) range.
Then the water passes through the highly compacted solid carbon block filter that also is designed to mechanically filter particles down to submicron size, including cysts. The highly compacted carbon block filter media is a blend of selected activated carbons and other materials that reduce inorganic as well as organic compounds. Only coconut shell-based carbons, a renewable natural resource, are selected for their far greater surface area and high retentivity characteristics. For select Multipure® Solid Carbon Block filters, the filter formulation includes a specially developed arsenic adsorbtive media that is blended with the carbon media specifically to reduce Arsenic V.
The materials are formed into a compressed carbon block, which is densely compacted to enhance the kinetics of the filter and provide performance that cannot be achieved with other filtration technologies. With the Multipure® Solid Carbon Block filter, the water contact time is longer and provides for greater adsorption of many different chemicals, pesticides, herbicides, and certain heavy metals. The Multipure® Solid Carbon Block filters are exceptionally uniform and do not channel or allow bypass as conventional granular activated carbon filters (GAC) are known to do. Unlike conventional GAC filters that can become incubators of bacteria, the densely compacted Multipure® Solid Carbon Block filter eliminates this health problem because there is no room for bacteria growth in the compressed carbon. Finally, the water passes through a post-filter, which provides integral strength to the carbon block section and prevents material degradation of the filter. The threaded polypropylene end caps seal the carbon block and assure the integrity of the seal between the filter cartridge and the housing.
Capacity ratings apply to the chemical adsorption capabilities of the carbon and specialized media. Filter life will vary in proportion to the amount of water used and the level of impurities in the water being processed. Claims of capacity are not applicable to contaminants reduced by mechanical filtration because of broad variations in the quality and quantity of physical matter in the drinking water. The Solid Carbon Block filter is engineered so that contaminants removed by mechanical filtration will cause the flow rate to decrease and the filter will clog. It is recommended that the filter be replaced when the first of the following occurs: (a) the filter’s rated capacity is reached; (b) the flow rate diminishes; (c) the filter becomes saturated with bad tastes and odors; or (d) annually.
The effectiveness of any drinking water treatment device is measured by the performance of its underlying filter. Multipure submits all of its Multipure-branded products to NSF International for rigorous testing and certification against the applicable NSF/ANSI Standards. For Point Of Use Drinking Water Treatment devices such as the ones Multipure manufactures, the applicable Standards are NSF/ANSI Standards 42 (Aesthetic Effects) and 53 (Health Effects). Multipure has proven through independent testing and certification that its products are the most effective water filters available in the market, reducing the widest range of contaminants of health concern.