Reclaimed Water Treatment with VSEP® | Advanced RO Solutions for Water Reuse
High‑Recovery, High‑Quality Water Reclamation for a Water‑Stressed World
Across drought‑prone regions, communities and industries are urgently searching for reliable, sustainable sources of clean water. As freshwater scarcity continues to intensify, reclaimed water, highly treated municipal effluent purified for beneficial reuse—has emerged as one of the most powerful tools for water resilience. Modern water reuse programs allow cities to irrigate landscapes, supply industrial processes, recharge aquifers, protect environmental flows, and reduce the discharge of emerging contaminants into rivers and groundwater systems. With VSEP® (Vibratory Shear Enhanced Process), these goals become achievable through advanced membrane treatment that exceeds the performance of conventional systems.
What Is Reclaimed Water?
Reclaimed water is municipal wastewater that has undergone advanced purification to achieve a high level of quality appropriate for non‑potable or even indirect potable reuse. Regulatory frameworks in the United States, including those used in states such as Nevada, require reclaimed water to meet strict microbiological and chemical criteria before it can be recycled, particularly when used for aquifer recharge or potable reuse. These standards include substantial log‑reductions of viruses, Giardia, and Cryptosporidium to ensure public health protection.
As communities face growing water demands and decreasing natural supplies, reclaimed water has become an essential resource. It can replace potable water in irrigation and industrial systems, support groundwater augmentation during drought, mitigate coastal seawater intrusion, reduce salinity in inland rivers, and limit the release of emerging pollutants by reducing the volume of treated wastewater discharged into the environment.
How Reclaimed Water Is Treated
Producing safe, high‑quality reclaimed water generally requires a multi‑stage purification train. A typical conventional treatment configuration begins with microfiltration or ultrafiltration, which removes suspended solids and pathogens. This is often followed by reverse osmosis (RO), which eliminates dissolved salts, trace organic chemicals, PFAS, and most pharmaceutical residues. The final stage commonly includes ultraviolet disinfection with advanced oxidation, which further degrades difficult‑to‑treat compounds, ensuring a purified product suitable for indirect potable reuse or aquifer recharge.
While effective, these traditional systems can be complex to manage. They frequently require significant pretreatment, high energy input, and extensive maintenance, especially when treating wastewater streams with high fouling potential.
Why Traditional Reclaimed Water Treatment Can Be Challenging
Conventional MF/RO/UV systems are well established, but their performance often depends on maintaining low membrane fouling rates and stable feedwater quality. For many utilities, this means investing in substantial pretreatment, dealing with high chemical consumption, and managing large volumes of RO concentrate—particularly difficult for inland facilities with limited disposal options. These factors collectively increase costs and limit recoveries, reducing the overall efficiency of water recycling programs. Unless the brine reject from the spiral can be evaporated, then it is discharged which does not help to reduce inland surface water salinity problems such as the San Joaquin River in California. Maximum recovery and minimization of the brine is essential to producing good benefits.
How VSEP® RO Transforms Reclaimed Water Treatment
The Vibratory Shear Enhanced Process (VSEP®) introduces a fundamentally different approach to membrane separation. By applying high‑frequency vibratory shear to the membrane surface, VSEP prevents the accumulation of solids and biofouling that quickly degrade performance in conventional systems and limit the recovery rate. As a result, VSEP allows RO membranes to operate directly on challenging wastewater streams with far fewer operational constraints.
VSEP’s high‑shear mechanism enables superior flux, higher recovery, and more stable long‑term operation. More importantly, it produces permeate quality equal to, or better than conventional RO systems, but with reduced chemical demand, lower fouling rates, and dramatically smaller concentrate volumes. In comparative studies, VSEP was found to be more cost‑effective and capable of producing high‑quality water suitable for blending back into the treated effluent stream.
This makes VSEP an ideal solution for utilities seeking to maximize reclaimed water production while simplifying system operations.
Applications for VSEP‑Produced Reclaimed Water
VSEP RO’s high permeate quality enables reclaimed water suitable for:
- Aquifer recharge & indirect potable reuse
- Aquifer recharge to block seawater intrusion
- Irrigation for golf courses, parks, and agriculture
- Industrial uses such as cooling towers and boiler feedwater
- Environmental restoration and surface water augmentation
- Salinity management in stressed inland watersheds
- Reducing POTW discharge of emerging pollutants such as PFAS and PPCPs
An Example where Recycling Municipal Effluent Rather than Discharging it can Help – Salinity Challenges in the San Joaquin River
The San Joaquin River faces growing and persistent salinity problems driven by decades of agricultural, municipal, and industrial discharges that introduce dissolved salts throughout the Central Valley watershed. Normal activities including municipal wastewater treatment, industrial processing, irrigation return flows, and broader water‑management practices continuously add salts to soils, groundwater, and surface waters, contributing to elevated salinity levels in the river system. [norcalwater.org]
Managing this salinity burden requires coordinated action, and the State of California routinely relies on strategic releases of potable fresh water from upstream reservoirs to help maintain mandated salinity objectives at key compliance points such as Vernalis. These reservoir releases, originating from facilities like New Melones Reservoir, are used to dilute saline inflows and maintain electrical conductivity within regulatory limits, ensuring that downstream agricultural users, ecosystems, and municipal systems receive water of acceptable quality. This results in consumption of drinking water supplies from the New Melones Reservoir simply to dilute the salt discharged into the river.
Several Publicly Owned Treatment Works (POTWs) are permitted to discharge treated municipal effluent directly into the San Joaquin River under NPDES authorization. Based on available regulatory records, the following POTW systems are confirmed dischargers:
1. City of Stockton – Regional Wastewater Control Facility
The City of Stockton Regional Wastewater Control Facility is one of the largest municipal dischargers to the San Joaquin River. It is authorized to discharge up to 55 million gallons per day of tertiary-treated effluent through multiple outfalls to the river within the Sacramento–San Joaquin Delta.
Effluent treatment includes primary sedimentation, biological treatment, facultative ponds, engineered treatment wetlands, tertiary media filtration, and chlorination/dechlorination prior to discharge. The treatment process used does not remove dissolved salt, PFAS, PPCPs, or phosphorus.
2. City of Lathrop – Consolidated Treatment Facility
The City of Lathrop Consolidated Treatment Facility is another POTW permitted to discharge treated wastewater to the San Joaquin River. The facility, serving approximately 13,200 residents, is authorized for up to 2.5 million gallons per day of treated effluent. A new dedicated surface‑water outfall has been constructed to discharge directly into the San Joaquin River as part of ongoing system upgrades.
VSEP® Performance at Big Bear – A Landmark Demonstration with CH2M Hill
One of the most influential demonstrations of VSEP’s performance in municipal reuse occurred in the Big Bear Valley of Southern California, where CH2M Hill, working with the Big Bear Area Regional Wastewater Agency (BBARWA), evaluated advanced treatment technologies to support groundwater replenishment and long‑term water sustainability in a region home to major ski resorts and sensitive alpine ecosystems. [vsep.com]
In this study, seven concentrate‑management strategies were assessed, but VSEP was the only technology that could be tested on‑site. The demonstration used concentrate from a pilot conventional MF/RO system to determine whether VSEP could further reduce waste volumes while maintaining or improving water quality. The results showed that VSEP not only reduced concentrate effectively, but also produced high‑quality permeate suitable for blending with BBARWA’s treated effluent while continuing to meet land‑application quality guidelines. Without concentrate management, the conventional spiral would not be practical due to the high volume of brine reject remaining. VSEP decreased this volume to a small amount making the approach to advanced treatment feasible. VSEP was also identified as more cost‑effective than electrodialysis reversal (EDR) and several other alternative concentrate management technologies for managing spiral RO concentrate in the project’s long‑term planning.
The Big Bear project ultimately helped shape the broader Replenish Big Bear Program, which is designed to upgrade the region’s treatment plant to a full advanced treatment system capable of returning purified water to the Big Bear watershed for aquifer recharge and drought resilience. [bbarwa.org]
The Value of Pilot Testing with VSEP®
Pilot testing plays a critical role in designing successful reclaimed water systems, especially when treating complex municipal effluents. Every wastewater source carries its own blend of solids, dissolved contaminants, organics, and potential fouling agents, and these variables can dramatically affect full‑scale system performance. A dedicated VSEP® pilot allows utilities to observe real‑world operation on their specific feedwater, generating high‑resolution data on flux stability, recovery rates, permeate quality, cleaning intervals, and energy consumption. Because VSEP’s vibratory shear greatly minimizes membrane fouling, pilot testing often reveals performance capabilities that far exceed what traditional RO systems can achieve on similar wastewater streams.
Beyond technical validation, pilot testing provides confidence for stakeholders, engineers, and regulatory reviewers who require empirical performance data before approving water reuse and concentrate‑management strategies. For reclaimed water projects intended for aquifer recharge, environmental protection, or indirect potable reuse, the pilot results become an essential part of demonstrating treatment reliability and regulatory compliance. A VSEP® pilot is frequently the key step that allows a project to move from concept to implementation with clarity and certainty.
Ready to Advance Your Reclaimed Water Program?
If your organization is exploring the production of high‑quality reclaimed water, improving water recovery, or reducing RO concentrate volumes, VSEP® offers a proven pathway to superior performance. Whether you are dealing with challenging municipal effluent, inland salinity constraints, complex regulatory requirements, or the need to secure drought‑resilient water supplies, VSEP® provides a technology platform capable of meeting both present and future demands. The next step is simple: let us help you evaluate your water with a tailored pilot program or system design review.
Email info@vsep.com to connect with our applications team, schedule a pilot demonstration, or begin exploring how VSEP® can help your facility achieve higher efficiency, lower operating costs, and exceptional water quality for reuse and recharge. Your reclaimed water future starts here.
Contact New Logic Research Today
- Request a community‑specific treatment design
- Schedule an on‑site VSEP® pilot test
- Speak with a process engineer about feasibility and permitting
- Receive a detailed performance and cost analysis
Email: info@vsep.com
Call: +1 (775) 783-7600
Learn More:
See a full description of Pilot Testing: https://www.vsep.com/technology/pilot-testing/
Case study for Big Bear Valley: https://www.vsep.com/pdf/articles/Big-Bear-RO-Reject-Report.pdf
Frequently Asked Questions (FAQ) About Reclaimed Water Treatment and VSEP® Technology
What is reclaimed water and why is it important?
Reclaimed water is municipal wastewater that has undergone advanced treatment to produce high‑quality water suitable for non‑potable or indirect potable reuse. As water scarcity worsens across drought‑prone regions, reclaimed water provides a sustainable supply for irrigation, industrial processes, aquifer recharge, and environmental restoration. It also reduces the discharge of emerging contaminants into rivers and groundwater systems.
How is reclaimed water traditionally treated?
Conventional advanced treatment typically includes microfiltration or ultrafiltration, followed by reverse osmosis (RO), and ultraviolet (UV) disinfection with advanced oxidation. These processes remove solids, pathogens, salts, PFAS, pharmaceuticals, and trace organics. While effective, they can be energy‑intensive, complex, and susceptible to fouling, especially when treating challenging municipal effluent. They also leave large volumes of brine reject
What makes VSEP® different from standard RO systems?
VSEP® (Vibratory Shear Enhanced Process) uses high‑frequency vibration to keep the membrane surface clean, dramatically reducing fouling and enabling RO to operate at higher flux and higher recovery on wastewater streams that would overwhelm conventional systems. VSEP® produces permeate quality equal to or better than traditional RO while generating far less concentrate, lowering chemical usage, and reducing operating costs.
Why is high recovery important in inland water reuse applications?
In inland areas, RO brine discharge often adds salinity to rivers and groundwater, worsening existing water‑quality challenges. High recovery reduces the volume of brine produced. By minimizing concentrate generation, VSEP® helps prevent salinity impacts in stressed watersheds such as the San Joaquin River, where municipal and agricultural discharges already elevate dissolved salts.
How does reclaimed water reuse help manage salinity in inland rivers?
Instead of discharging effluent containing dissolved salts into the river, utilities can recycle municipal wastewater into high‑quality reclaimed water using VSEP®. This reduces salt loading to the river and decreases the need for states to release potable fresh water from reservoirs, such as New Melones, to dilute salinity at key compliance locations like Vernalis.
What tertiary filtration method does the City of Stockton use?
Stockton uses dual‑media tertiary filtration as part of its treatment train, following biological treatment and dissolved air flotation. While effective for solids removal, this process does not remove dissolved salts or emerging contaminants.
How was VSEP® demonstrated at Big Bear?
A landmark pilot led by CH2M Hill and the Big Bear Area Regional Wastewater Agency showed that VSEP® could dramatically reduce RO concentrate volume while still producing high‑quality permeate suitable for blending and land‑application requirements. This demonstration proved that advanced treatment could be made feasible in regions where conventional RO alone would generate impractically large volumes of brine.
Why is pilot testing important before installing a full‑scale VSEP® system?
Every wastewater source has unique characteristics, including solids content, organics, and fouling potential. Pilot testing allows utilities to observe real‑world performance on their specific feedwater, evaluate achievable flux and recovery, forecast OPEX, and demonstrate regulatory compliance. This de‑risks project development and builds confidence among engineers, stakeholders, and permitting agencies.
What types of reuse applications are possible with VSEP®‑treated water?
VSEP® permeate can support a wide range of uses, including:
- Aquifer recharge and indirect potable reuse
- Seawater intrusion prevention
- Irrigation for agriculture and landscapes
- Industrial cooling and boiler feed
- Surface water augmentation and environmental restoration
- Salinity management in inland watersheds