Explore GSR technologies for farms, digesters, processors, utilities, fertilizer, and energy systems.
GSR BOLT™ is GSR’s core nutrient transformation platform for manure, food, digestate, and other nutrient-rich waste streams. It provides the foundation for GSR’s platform pathways across waste-to-value, water-quality, agriscience, and alternative energy applications.
Organizations managing nutrient-rich liquid waste streams looking to recover value and improve nutrient management.
The GSR BOLT™ platform captures nitrogen, phosphorus, and organic value from nutrient-rich liquid waste streams, converting them into fertilizer, cleaner water, and other resource outputs. All BOLT pathways integrate seamlessly with existing farm, digester, and processor operations.
GSR BOLT™ fits where nutrient-rich liquid residuals create treatment, hauling, land-application, or water-quality challenges that can be improved through recovery and reuse. USDA NRCS, VT also noted that nutrient recovery work demonstrated with GSR Solutions can broaden the conservation-planning options available to producers.
Conservation Planning Relevance
“Managing nutrients in manure and wastewater is a priority for protecting soil and water resources. Waste treatment and nutrient management practices can help address on-farm nutrient challenges and support water quality goals. Demonstration efforts evaluating nutrient recovery approaches, including one demonstrated with GSR Solutions, can expand the options producers can consider as part of conservation planning in different farm settings.”
— USDA NRCS, VT
Source: Agriculture Industry Today, EIN Presswire, February 11, 2026
GSR Insights Series | Nutrient Recovery & Water Quality
A closer look at how excess nutrients, particularly nitrogen and phosphorus, from farms, food and beverage facilities, and anaerobic digesters can become runoff, and how a practical nutrient recovery solution can keep them in productive use instead of becoming pollutants.
See why this issue matters →GSR BOLT™ is designed to recover nutrients from waste streams and convert them into more useful downstream outputs while supporting water-quality improvement and broader resource-recovery goals.
For anaerobic digester operations managing liquid digestate.
For farms and processors managing nutrient-rich liquid residuals.
For nutrient recovery and fertilizer production.
For optional water polishing and cleaner recycled water outputs.
Tell GSR about your site, waste stream, product need, partnership interest, or project opportunity. GSR can help evaluate nutrient recovery, fertilizer, water-quality, agriscience, and resource-recovery opportunities.
GSR BOLT™ is the core nutrient-recovery platform. Its pathways are configured around site type, waste stream, and desired outputs, including fertilizer recovery, cleaner recycled water, and optional water polishing.
GSR BOLT™ can be deployed based on site readiness, project goals, and commercialization pathway, from feasibility screening and pilot validation to full-scale implementation with nutrient recovery, fertilizer production, and optional ClearFlow™ water polishing.
Anaerobic digesters convert organic waste into biogas, RNG, or electricity, but liquid digestate can still contain significant nitrogen, phosphorus, and organic residual value. GSR AD BOLT™ adds a nutrient recovery and value-creation layer for digester operations.
Anaerobic digester systems used for Combined Heat and Power (CHP) or Renewable Natural Gas (RNG) production often generate nutrient-rich liquid digestate that must be managed under site-specific nutrient-management and water-quality requirements. These systems are effective primarily in treating biochemical oxygen demand (BOD), which measures the level of organic pollution in water. However, these systems do not effectively manage nutrients like nitrogen and phosphorus. In many cases, digestate effluent may require additional treatment, separation, or nutrient-management controls before broader reuse, discharge, or higher-value recovery pathways are practical. Many operations lack the capability to manage this additional treatment process. GSR-AD-BOLT™ is designed to help close this treatment and value-recovery gap.
The GSR-AD-BOLT™ system uses a proprietary biological process to recover nutrients from digested effluent in controlled stages. Depending on site configuration, the process can support additional BOD reduction and produce useful downstream outputs such as organic fertilizer products, cleaner recycled water options, biomass-based inputs, and renewable resource pathways.
GSR has worked with dairy farms and project partners operating anaerobic digesters, including systems producing electricity or renewable gas. The GSR AD BOLT™ pathway is designed to complement these operations by adding nutrient transformation, fertilizer production, water-quality, and resource-recovery value to the digester platform.
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Explore our featured projects to see examples of our completed projects.
One example features a GSR AD BOLT™ system integrated with a large dairy farm operating an anaerobic digester. In 2023, USDA NRCS Hub Co-leads from ten different USDA offices, along with other USDA leaders from across the country, visited this dairy farm site to observe the biodigester with GSR AD BOLT™ system and its products (image below). The nutrient recovery samples are displayed on the digester top, set against the backdrop of the cow barn that supplies dairy manure for the digester, and an organic fertilizer booth display (images below).
During the tour, the USDA team observed the farm’s biodigester and the commercial production of organic fertilizer supported by the GSR AD BOLT™ system. The system captures nutrients from liquid manure digestate and supports a circular process in which recovered materials can be reused, spent bedding and manure can return to the digester, and the operation can connect energy production, nutrient recovery, and organic fertilizer production.
Another example is one of five pilot projects undertaken with a mid-sized dairy farm prior to the pandemic. Two additional projects are in progress.
Photo source: Google Maps
A broader utility-partner example involved project planning completed in 2018. A similar multi-farm feasibility project began in 2022 and remains in progress.
Photo
source: Green
Mountain Power Google Map in VPR News
Not every site has or needs an anaerobic digester. GSR BOLT FLO™ is designed for farms, processors, breweries, and other operations managing nutrient-rich liquid residuals that need treatment, nutrient recovery, and value creation without adding a full digester system.
Potential sites for the GSR BOLT FLO™ system include dairy farms, food and beverage processors, breweries, and municipal or utility operations managing nutrient-rich wastewater. The system is designed to add treatment, nutrient transformation, and value-recovery options without requiring anaerobic digestion.
Explore our case studies to see examples of our completed projects. These include dairy farms managing manure and food waste, as well as breweries handling wastewater.
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For many farms and food and beverage facilities, growth can be constrained by the cost and complexity of managing nutrient-rich waste streams. GSR BOLT FLO™ is designed to help address this challenge by adding treatment, nutrient transformation, and value-recovery options without requiring an anaerobic digester.
How the GSR BOLT™ Platform Works Across Pathways
Across GSR AD BOLT™ and GSR BOLT FLO™ the GSR BOLT™ platform applies a common nutrient transformation approach that can be configured for different waste streams, site conditions, and downstream value pathways. While each system is adapted to its operating environment, the core process combines biological treatment, nutrient capture, and physical separation to support fertilizer production, cleaner water outputs, biomass-based inputs, and other value-added uses.
Many animal farms, food & beverage industries, and other operations generate liquid waste rich in nitrogen and phosphorus. Anaerobic digesters can reduce organic load, commonly measured as biochemical oxygen demand (BOD), but they are not primarily designed to remove excess nitrogen and phosphorus from liquid effluent. As a result, digestate or other treated effluents may require additional treatment before they can be reused, discharged, or managed in ways that meet site-specific water-quality and regulatory goals.
GSR’s waste to value process uses proprietary biological technology to modify the properties of incoming waste streams, with the goal of removing excess nutrients and improving water quality. The system employs microbial-based biomass and separation steps to capture nitrogen and phosphorus from wastewater, producing a cleaner treated-water output. After treatment, the solid fraction is separated and converted into target molecules and products, while the treated water is recycled for reuse. In certain variations, additional biogenic materials such as biochar or plant-derived materials are incorporated to further enhance treatment efficiency.
Tell GSR about your site, waste stream, product need, partnership interest, or project opportunity.
GSR Agriscience develops organic fertilizer and plant nutrition products that help return recovered nutrient value to productive use in crop, soil, and garden applications.
GSR Agriscience turns nutrient transformation into practical plant nutrition. By converting recovered nutrients into organic fertilizer, the platform connects waste-to-value innovation with crop performance, soil health, and resilient agriculture.
Independent field evaluations show how GSR’s plant nutrition products can support crop performance and nutrient efficiency. View GSR Agriscience field-trial highlights →
Agriscience is part of GSR Solutions’ broader nutrient transformation platform. While GSR also works across water, energy, and nutrient-management applications, this business area is focused on plant nutrition, fertilizer development, and product commercialization.
Tell GSR about your product need, partnership interest, or project opportunity.
GSR’s broader waste-to-value experience can support selected resource-recovery and energy-linked opportunities, including biomass-based intermediates, digester value enhancement, fuel-related pathways, and other applications where project conditions align.
The platforms are designed for project partners working at the intersection of waste management, nutrient transformation, anaerobic digestion, renewable fuels, and resource recovery. Depending on site configuration, these pathways can support improved digester economics, biomass-based energy development, fertilizer production, and other waste-to-value opportunities.
GSR’s alternative energy platforms extend the company’s patented nutrient transformation capabilities into waste-derived energy and fuel pathways. By linking digesters, nutrient-rich residuals, recovered biomass, and downstream conversion systems, these platforms are designed to support fertilizer production, low-carbon fuels, alternative energy opportunities, and other value-added outputs.
Potential partners include livestock farms, food and beverage processors, anaerobic digester operators, utilities, and project developers managing nutrient-rich waste streams. For these partners, the opportunity is to improve waste handling and water stewardship while creating new value from residuals, biomass, and nutrient streams that are often costly to manage.
GSR AD EE2-OIL™ is an alternative liquid-fuel pathway designed to support alternative fuel opportunities, including renewable jet fuel, SAF-related pathways, biodiesel, and related transportation or heating-fuel applications. The system can work with anaerobic digesters and may also be configured for non-digester operations where suitable biomass or waste-derived feedstocks are available.
This pathway is connected to GSR’s Farm-to-Fly work. The Farm-to-Fly initiative was associated with national efforts involving USDA, DOE, and the Commercial Aviation Alternative Fuels Initiative (CAAFI).
GSR completed Phase 1 of its Farm-to-Fly project in 2018. A Phase 2 pathway remains under planning as GSR continues to evaluate waste-derived and biomass-based opportunities connected to alternative aviation fuel and renewable liquid-fuel development.
GSR’s Farm-to-Fly work explored waste-derived and biomass-based pathways connected to renewable liquid fuels and alternative aviation fuel development.
> View the Farm-to-Fly featured project →
GSR AD EE2™ is an alternative energy pathway focused on enhanced economic and environmental performance for anaerobic digester systems. The platform is designed to support biogas-based outputs such as RNG, CHP, and recovered bedding, while also connecting digestate management with fertilizer production and broader resource-recovery opportunities.
Project status: Multiple dairy farm projects are in the planning stage.
GSR H2™ is a hydrogen pathway focused on converting advanced biomass into low-carbon hydrogen through integrated bio-conversion and downstream processing. The platform is designed to cultivate or source biomass, route it through conversion steps, and support modular integration with compatible water, waste, or renewable energy infrastructure.
Project status: GSR H2™ planning was completed prior to the pandemic, and a subsequent phase is currently underway.
Project sites: GSR AD H2™ planning was completed prior to the pandemic, and subsequent the phase is currently underway.
Across GSR AD EE2™, GSR AD EE2-OIL™, and GSR H2™, GSR’s alternative energy platforms are designed to connect waste management, nutrient transformation, recovered biomass, and energy production. Depending on the project configuration, these pathways can support improved digester value, fertilizer production, alternative fuels, hydrogen, and other waste-to-value outputs.
Tell GSR about your site, waste stream, product need, partnership interest, or project opportunity.
Common questions about GSR’s bolt-on nutrient recovery platform, how it fits into farm and digester operations, and how nutrient-rich residuals can be transformed into useful water, agriscience, energy, and resource-recovery pathways.
Tell GSR about your site, waste stream, product need, partnership interest, or project opportunity.