Scaling-resistant RO/NF membrane for concentrate minimization | BOR DO 18 N016

Frequently Asked Questions (FAQs)

What is the title of this grant opportunity?

The opportunity is titled "Scaling-resistant RO/NF membrane for concentrate minimization."

Which federal agency is offering this award?

This is a Bureau of Reclamation (Department of the Interior) research and development award.

What is the main goal of the project?

The core goal is to improve reverse osmosis (RO) and nanofiltration (NF) membrane performance under difficult water treatment conditions by reducing scaling. By limiting scale formation on membranes, the project aims to minimize the amount of concentrate (brine waste) produced and increase overall water recovery from impaired or hard-to-treat source waters.

What does "concentrate minimization" mean in this context?

In this context, concentrate minimization refers to reducing the volume of brine (concentrate) generated during RO/NF treatment. If membranes can run at higher recovery before scaling limits performance, more treated water can be produced from the same feed source with less waste concentrate.

Why is membrane scaling such a focus for this work?

Scaling can limit how long membranes can operate and how high recovery can be pushed before performance declines. Reducing scaling can allow longer operation and higher recoveries, which can lower operating costs and increase the amount of treated water available.

What technical approaches are being evaluated to reduce scaling?

The project centers on evaluating and potentially combining two scaling-mitigation approaches: (1) a chlorine-resistant membrane chemistry developed by the Bureau of Reclamation that is described as having inherent scaling resistance, and (2) nanoscale surface patterning (including nanoimprinted membrane surfaces), which prior work suggests can also reduce scaling.

What is Reclamation's chlorine-resistant membrane chemistry, and why does it matter here?

Reclamation has developed a proprietary chlorine-resistant membrane chemistry. Chlorine resistance is practically important because it can enable certain cleaning or pretreatment strategies. In this opportunity, that chemistry is also described as having inherent scaling resistance, meaning its surface/material properties may naturally discourage mineral scale formation or adhesion.

What is nanoscale surface patterning (nanoimprinting) in this opportunity?

Nanoscale surface patterning refers to creating engineered features at the nanometer scale on membrane surfaces, including nanoimprinted patterns. Prior work cited in the opportunity suggests these patterns can reduce scaling, and the project includes evaluating patterned versus unpatterned surfaces.

Will the project compare multiple membrane options?

Yes. The opportunity is structured to compare Reclamation's chlorine-resistant chemistry against similar chlorine-resistant chemistry options, both with and without nanoscale patterns. The results are intended to guide development of new membrane products.

Is the goal to create a commercially viable membrane product?

Yes. The stated intent is to use evaluation results to guide development of new, commercially viable membrane products that industry could realistically produce and deploy.

What types of waters or operating conditions are targeted?

The work targets challenging water treatment conditions, specifically impaired or difficult-to-treat source waters where scaling tends to be a limiting factor in RO/NF operations.

What is the funding mechanism for this award?

The award is offered as a cooperative agreement, which typically indicates substantial involvement by the federal agency during the project rather than a fully hands-off grant.

What is the funding activity category?

The funding activity category is science and technology and other research and development, consistent with applied R and D work intended to move toward deployable membrane designs.

How long is the project period?

The project timeframe is three years.

What types of costs are federal funds intended to cover?

Federal funds are specifically intended to cover personnel and travel costs required to meet the development objectives over the three-year period.

Who is eligible to apply?

Eligibility is limited to public and state-controlled institutions of higher education, such as state universities and similar public academic institutions.

How many awards are anticipated?

The opportunity anticipated a single award.

What is the maximum (ceiling) amount for the award?

The award ceiling is $206,334.

What is the Funding Opportunity Number (FON)?

The Funding Opportunity Number is BOR DO 18 N016.

What is the CFDA number associated with this opportunity?

The CFDA number is 15.560.

What does it mean that this is a "Notice of Intent to Award"?

The notice is labeled as a "Notice of Intent to Award," which typically implies the agency had already identified a likely recipient or is signaling an intent to proceed with an award under defined terms, rather than conducting a broad, fully competitive solicitation.

How does chlorine resistance relate to scaling resistance in this project?

The opportunity emphasizes that chlorine resistance can support certain cleaning or pretreatment approaches, and that combining chlorine tolerance with scaling resistance could reduce downtime and chemical use while improving system reliability. The project focuses on membranes that can operate longer and at higher recoveries before scale formation becomes limiting.

What is the practical impact if the project succeeds?

If successful, the work could enable higher-recovery RO/NF treatment with less concentrate generation, longer operating runs before scaling limits performance, and potentially lower operating costs and improved reliability for treating impaired waters.