Drinking Water Filtration

Gore Hill Water Treatment Plant’s Backwash Recycle System Conserves More Than 1.5 Million Gallons Of Water Annually
The emphasis on sustainability in recent years has placed an increased demand on environmentally friendly solutions that adhere to strict regulatory standards. The H2Zero^TM backwash/recycle system from AdEdge Water Technologies conserves water by storing and treating contaminated backwash water from filtration and treatment systems.

White Paper: Comparing Conventional Settling Basin Clarification To Leopold Clari-DAF System Clarification

The source waters for the Greenville Water System were so clear that for over 70 years the water from the mountain reservoirs was unfiltered and only treated with chlorine. However, in the mid-1980s, the Adkins Plant, designed at 30 MGD and employing conventional settling basin clarification technology, was built to filter water drawn from Lake Keowee. Increasing regulations required all surface water systems to be filtered, so a new state-of-the-art filter plant was placed in service to provide filtration for all of the water drawn from the Table Rock and Poinsett Reservoirs. This paper compares the performances of the two treatment processes, given the fact that the source water is very similar and the treatment chemicals are identical

Membranes Deserve Multi-Stage Protection

Membranes are extraordinarily effective at water purification at the sub-micron level – which is exactly why they need to be protected from particulate contamination. Membranes last longer, operate more productively, and require fewer cleaning cycles when they are shielded from the silt, sand, fibrous material, algae, bacteria, mollusk larvae, scale, and the other contaminants that can cripple millions of dollars’ worth of membranes in weeks or even days. Multi-stage filtration can be both efficient and cost-effective in protecting membranes

Case Study: West Warwick, RI

Infilco Degremont, Inc. was awarded the contract to supply a biological filtration system (Biofor®) to the Town of West Warwick. By Degremont Technologies - Infilco

Solve High Alkalinity With Membrane Contactors

When City Public Service discovered that high bicarbonate alkalinity was negatively affecting anion bed life, the San Antonio, TX utility decided to install a membrane degassing system as budget constraints prevented a complete system replacement. This case study reviews how the membrane degassing system was installed and the operational and economic benefits realized by the utility.

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Pretreatment Systems

Aquatech’s pretreatment solutions include clarification, softening, filtration (both pressure & gravity), chemical feed systems and sludge handling.

Filtration: Filtomat MCFM Series

The MCFM filters remove dirt particles as water flows through the coarse and fine screens to the outlet. The PLC controls the self-cleaning modes required according to the type of dirt and the dirt loads

Filtration: Pleated Paper Filter Series

Shelco's Pleated Paper Series housings are the most versitile filtration units produced in the industry.

Whittier™ Filtration and Separation

Whittier Filtration offers a broad range of advanced filtration treatment solutions for the removal of solid matter and impurities from liquid streams and for oil/water separation. Technologies include precoated pressure leaf filters, nutshell filters, media filters and softeners

Ferazur/Mangazur Systems For Biological Iron And Manganese Removal

Ferazur/Mangazur are biological filtration processes for the removal of iron, manganese and arsenic from groundwater sources. The precipate is removed by using Biolite "S", our specially developed media that requires no replacement.

Baker Filtration Systems

High and low-pressure carbon and specialty media vessels. Odor control systems. Sand filters. Duplex cartridges. Bag filters and auxiliary equipment.

High Efficiency Filter Cartridges

Shelco Filters' MicroVantage™ high efficiency filter cartridges are the ideal choice when high retention efficiency and outstanding value are essential. Our product range includes high efficiency and absolute rated melt blown depth and pleated filter cartridges to provide multiple options for the filtration process.

Filtration: FA Series Air and Gas Filters

Shelco's FA Filtration Series are ideal for all types of gases and compressed air filtration.

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Water treatment filtration involves the removal of suspended particles from water by passing the water through a filtration medium. As the water passes through the filter, floc, minerals, microorganisms and other impurities get stuck in the filter and are removed from the filtered water. Passage can be blocked by physical obstruction, biological action, adsorption, absorption or a combination of ways. Filtration is usually the final step in the solids removal process during water treatment which typically begins with coagulation and advances through flocculation and sedimentation.

Unfiltered or turbid water is difficult to disinfect because microorganisms growing on suspended particles are often harder to kill than when they are separated from the particles. Turbidity can also cause unwanted taste and odor issues in the potable water supply. Drinking water filtration is also used to remove microorganisms that are resistant to traditional methods of disinfection such as chlorination. By requiring a low turbidity in finished water, water treatment plants are ensuring that few or no microorganisms such as Giardia are present in finished drinking water.

There are three typical methods of clean water filtration used during the water treatment process. Conventional filtration follows coagulation, flocculation and sedimentation and precedes disinfection. Direct Filtration follows coagulation and flocculation when there is no sedimentation step. The final method called In-Line Filtration takes place without flocculation or sedimentation. A coagulant chemical is added to the water just before filtration and coagulation occurs in the filter.

There are many types of filter media being used in today’s water treatment industry.

Video: Amiad AMF Filters

The Amiad automatic microfiber (AMF) filtration system delivers filtration down to the 2-micron level without the use of disposable cartridges. Polyester microfibers wound tightly around specially designed cores capture suspended solids.