WaterSurplus Innovations
Collaborative innovation has been a hallmark of the WaterSurplus business model for more than 30 years. From unlocking capital for both buyers and sellers by introducing the concept of a surplus equipment marketplace, to developing patented innovations that transform decades old standard practices. We identify areas of opportunity, apply engineering rigor, tap strategic relationships, and tenaciously challenge the status quo in order to advance the cause of sustainable water treatment. Watch this space to learn about our latest innovations.
30 years of innovations

The Membrane Opportunity:

RO membrane recycling has long been a core focus of our surplus division. For most RO operators, membrane replacement is the largest RO operating expense. Our used membranes provide significant savings, but we didn't stop there. Our customers count on us to continue delivering more value, so we began researching ways to mitigate fouling and improve post-cleaning resilience.


NanoStack® Hydrophilic Coating:

Our research quickly brought us to polydopamine being as a hydrophilic conformal coating on Ultra-Filtration membranes for produced water. Our initial research found that the technology was transferrable across different types of membranes including Micro-, Ultra-, Nano-, and RO elements. We then secured an exclusive world-wide license to develop the coating for all membrane types and began piloting our concept.

Membrane Surface Detail

Contact Angle

Fouling Resistance

Fouling Resilience

Speak with our Design Engineering Team about the benefits of our Hydrophilic Coating in your system.


Design Engineernig Team

John Barelli

Dileep Agnihotri, PhD
Chief Technology Officer

The RO Opportunity:

As the performance improvements of the NanoStack Coating became clear, our customers asked if even more could be done to leverage the benefits of the new coating. With that, our new goal became to design a reverse osmosis system that protects or even extends the life of the RO elements, while reducing cleaning frequency and chemicals, energy consumption, and concentrate to waste.

Impact RO™

Tasked with modernizing the existing RO design paradigm, our team of engineers and researchers developed several innovations that create improved operation and reduce membrane fouling. These patented modifications leveraged the attributes of the improved surface chemistry of the membrane with active micro-disruptions of the concentration polarization cake layer, further reducing fouling during normal operation. We have accomplished this in several interesting ways. The most notable include:

Feed-forward Design Creates Improved Flux

Improved Flux Across Stages

Variable Recovery


Continued Production During 3rd Stage Isolation & Maintenance

Impact RO™

Getting Started:

We understand that the capital expenditure cycle of RO system owners is relatively long and fixed. Therefore, we have developed a stage-gate process to accommodate the OPEX and CAPEX requirements of every organization. This also allows for a pilot period wherein our technology can be tested in any specific application with minimal initial cost.

Our application engineers are scheduling pilot programs now. Contact us to discuss the details of your water treatment program.

  1. Our membrane experts audit and optimize all phases of your current reverse osmosis operations and membrane cleaning.
  2. Pilot our NanoStack coated membranes with a 5 gpm side stream system or in an existing RO.
  3. If required implement a design retrofit to the existing RO in order to provide some of the basic benefits of a new Impact RO with a smaller expenditure. This will significantly reduce operating costs and membrane cleaning and disposal costs.
4. Lastly, purchase a custom Impact RO System. Each system is engineered specifically to enhance the performance of our NanoStack coated membranes. The RO is designed to protect and extend the life of the elements, while reducing cleaning frequency and chemicals, lowering overall energy usage and minimize your brine waste to drain. With a significantly lower cost of ownership than standard RO units, the Impact RO will deliver high quality water while achieving high recoveries and providing accelerated returns on your capital investment.