Pre-Filtration for Advanced Groundwater Treatment Systems
Protecting Reverse Osmosis and Advanced Treatment Systems Through Reliable Suspended Solids Removal
Groundwater is an essential source of drinking and process water for municipalities, utilities, and industrial facilities. However, groundwater treatment has become increasingly complex as facilities address contaminants such as PFAS, radium, iron, manganese, arsenic, nitrates, and other regulated substances.
Advanced treatment technologies, including reverse osmosis, ion exchange, granular activated carbon, oxidation, and media filtration, can effectively target these contaminants. According to the U.S. Environmental Protection Agency, granular activated carbon, ion exchange, reverse osmosis, and nanofiltration are among the best available technologies for treating PFAS in drinking water.
However, the performance of these advanced processes often depends on what happens before the water reaches them.
Effective pre-filtration removes suspended solids from groundwater, helping protect membranes, resin beds, adsorptive media, and other critical treatment equipment. By reducing the particulate load entering downstream systems, facilities can improve treatment reliability, reduce maintenance, and lower lifecycle operating costs.
Why Suspended Solids Matter
Groundwater may appear relatively clear, but it can still contain sand, silt, clay, corrosion products, precipitated minerals, and oxidized iron or manganese. These particles can accumulate inside downstream treatment systems and interfere with their performance.
Without proper pre-filtration, suspended solids may contribute to:
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Premature membrane fouling.
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Increased differential pressure.
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More frequent membrane cleaning.
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Clogged cartridge filters.
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Reduced adsorption capacity.
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Contaminated ion-exchange resin beds.
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Higher maintenance requirements.
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Unplanned interruptions to treatment.
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Shorter equipment and media life.
These issues can increase operating costs and make it more difficult for a facility to maintain consistent water quality and treatment capacity.
A reliable pre-filter acts as the first line of protection, continuously removing suspended solids before they reach sensitive treatment equipment.
Supporting PFAS Treatment
PFAS treatment systems commonly use granular activated carbon, ion exchange, reverse osmosis, or nanofiltration. These technologies are designed to remove dissolved contaminants, but suspended solids can occupy valuable media capacity, foul membranes, and increase the operational burden placed on the treatment system.
Installing a Tekleen automatic self-cleaning filter upstream helps remove particulate buildup before it reaches the treatment media or membrane system. This allows the downstream process to focus on the contaminants it was designed to address.
Pre-filtration may help:
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Protect the available adsorption capacity of granular activated carbon.
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Reduce suspended solids entering ion-exchange resin beds.
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Minimize particulate fouling on reverse osmosis membranes.
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Extend intervals between cleaning or media servicing.
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Support more consistent treatment performance.
Tekleen pre-filtration does not remove dissolved PFAS compounds directly. Its role is to protect and support the downstream technology responsible for PFAS removal.
Protecting Reverse Osmosis Membranes
Reverse osmosis systems depend on stable feedwater quality. Suspended solids can deposit on membrane surfaces, restrict flow, increase differential pressure, and contribute to more frequent cleaning.
Tekleen automatic self-cleaning water filters remove particles before they enter the RO system, helping reduce the solids load placed on membranes and cartridge filters. Depending on the application and water-quality requirements, Tekleen filtration solutions are available with filtration levels down to 2 microns.
By improving feedwater quality, facilities can potentially:
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Reduce membrane fouling.
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Extend membrane cleaning intervals.
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Reduce cartridge filter consumption.
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Maintain more consistent differential pressure.
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Improve process availability.
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Lower maintenance and replacement costs.
Unlike disposable cartridge filters, Tekleen filters automatically clean and reuse their stainless-steel screens, reducing routine filter replacement, labor, inventory, and waste.
Supporting Radium, Iron, Manganese, Arsenic, and Nitrate Treatment
Pre-filtration also supports a variety of other advanced groundwater treatment processes.
Radium removal
Ion exchange and reverse osmosis may be used for radium treatment. Removing sediment and precipitated iron or manganese upstream helps keep resin beds and membranes cleaner, supporting longer and more reliable operating cycles.
Iron and manganese treatment
Iron and manganese are frequently treated through oxidation followed by filtration. Once oxidized, these contaminants form particles that can create a significant solids load. Tekleen automatic self-cleaning filters can remove these particles while reducing the need for manual cleaning or disposable filter replacement.
Arsenic removal
Arsenic treatment may use adsorptive media, iron-based media, or reverse osmosis. Upstream suspended solids removal helps maintain consistent flow and surface contact within the media bed while reducing particulate accumulation.
Nitrate reduction
Anion-exchange resins and reverse osmosis membranes can be affected by sediment entering the treatment process. Pre-filtration helps protect these systems and may reduce cleaning and regeneration demands associated with particulate fouling.
Uninterrupted Flow During Backwash
For groundwater treatment facilities, stopping the process every time a filter requires cleaning is often impractical. Tekleen filters are engineered to clean automatically while the system remains online.
When the differential-pressure setting is reached, the filter initiates an automatic backwash cycle. Accumulated debris is removed from the screen in less than 10 seconds, while filtered water continues flowing to the downstream process.
This uninterrupted flow during backwash helps facilities maintain treatment continuity without requiring redundant filtration equipment solely to accommodate cleaning cycles.
The result is:
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Continuous filtration during automatic backwash.
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Backwash cycles completed in less than 10 seconds.
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Minimal backwash water consumption.
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No interruption to downstream treatment.
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No need to manually clean screens.
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No disposable cartridges.
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Reduced labor and maintenance demands.
It is the Tekleen promise: Flow. Uninterrupted.
Lowering the Lifecycle Cost of Groundwater Treatment
The value of pre-filtration extends beyond particle removal. Protecting expensive downstream equipment can reduce operating costs throughout the life of the treatment system.
A properly selected Tekleen automatic self-cleaning filter can help reduce:
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Membrane cleaning frequency.
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Cartridge filter purchases.
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Media fouling and premature replacement.
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Maintenance labor.
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Treatment downtime.
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Backwash water consumption.
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Waste generation and disposal.
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Overall lifecycle operating costs.
Tekleen systems are available in a broad range of configurations for municipal, commercial, and industrial applications, with flow capacities up to 20,000 GPM. Their compact design also makes them suitable for new treatment plants, system expansions, and retrofit projects where space may be limited.
More Than 40 Years of Proven Performance
For more than 40 years, Tekleen has helped municipalities and industrial facilities protect critical water systems through reliable automatic self-cleaning filtration.
Every groundwater source and treatment process is different. Flow rate, particle size, solids concentration, operating pressure, water chemistry, and downstream treatment requirements must all be considered when selecting a pre-filtration system.
Tekleen works with engineers, operators, and facility managers to evaluate these conditions and develop a filtration solution that supports long-term system performance.
By removing suspended solids before they reach advanced treatment equipment, Tekleen helps facilities protect their investment, reduce operating demands, and maintain dependable water treatment.
Protect advanced groundwater treatment with automatic self-cleaning filtration and uninterrupted flow during backwash.
