Floating Covers for Dairy Wastewater Lagoons — Ammonia Containment, Odor Control & Evaporation Reduction
Reduce dairy lagoon ammonia losses by up to 85%, suppress odors by 90%, and protect lagoon capacity with AWTT's modular floating covers.
Dairy lagoons and manure storage ponds use floating covers to contain odors, capture methane, reduce evaporation, and maintain compliance with state agricultural waste management regulations. Dairy manure lagoons are significant sources of ammonia nitrogen, hydrogen sulfide, and volatile organic compound (VOC) emissions. Uncovered lagoons lose up to 100% of their ammonia nitrogen to the atmosphere — waste that represents both a nutrient management compliance liability and a lost fertilizer value. AWTT's floating cover systems address this directly: peer-reviewed studies document that covering cattle slurry tanks reduces ammonia losses to approximately 15% compared to 100% for uncovered controls.
Beyond ammonia, AWTT floating covers deliver up to 99% surface coverage to suppress H₂S and odor emissions by up to 90%, reduce evaporation by up to 95%, block algae-stimulating sunlight, and exclude waterfowl from manure storage — creating a comprehensive solution for dairy wastewater lagoon management. For northern dairy operations, the Hexprotect® MAX R insulated floating cover adds R-17+ thermal insulation, maintaining biological treatment activity through winter and reducing lagoon heating costs by up to 85%.
Common Dairies Industry Challenges
Uncovered water storage creates measurable operational, environmental, and compliance risks specific to dairies facilities.
Ammonia Emissions from Manure Lagoons
Uncovered dairy manure lagoons release 100% of their ammonia nitrogen to the atmosphere. Studies document up to 15% of total nitrogen lost from cattle slurry as ammonia within 24 hours of application — air permit and nutrient management compliance depends on containment.
Persistent Odor & Neighbor Complaints
H₂S, ammonia, and volatile organic compounds from uncovered dairy lagoons generate pervasive odors that drift downwind for miles. Community complaints trigger regulatory investigations and threaten dairy operating permits in proximity to residential zones.
Excessive Evaporation Losses
Dairy lagoons in warm or arid climates can lose 50–80 inches of water per year to evaporation, concentrating nutrients and solids above permit thresholds and requiring costly freshwater makeup to maintain lagoon capacity.
Algae Growth & Effluent Quality
Sunlight on uncovered lagoon surfaces drives algal growth that raises Total Suspended Solids (TSS) and CBOD5 in effluent — threatening Clean Water Act discharge permit compliance and increasing treatment costs before land application.
Cold-Climate Lagoon Performance
In northern dairy regions, winter temperatures reduce biological activity in treatment lagoons, extending the retention time needed for nutrient reduction and increasing the volume of lagoon storage required before spring field application.
Waterfowl Contamination
Open lagoons attract geese and ducks that introduce pathogens including Campylobacter, Salmonella, and E. coli into manure storage — complicating nutrient management and presenting biosecurity risks to nearby milking facilities.
AWTT Floating Cover Solutions for Dairies
Modular, maintenance-free floating covers engineered specifically to address the liquid containment challenges of dairies operations.
Ammonia Containment: 15% vs. 100% Loss
AWTT floating covers reduce cattle slurry ammonia losses from 100% (uncovered) to approximately 15% — a 85% reduction documented in peer-reviewed studies. Hexprotect® AQUA's 99% surface coverage creates the physical barrier required to contain nitrogen and support nutrient management plan compliance.
Odor Reduction Up to 90%
AWTT's Hexprotect® floating covers reduce odor-causing compound emissions by up to 90%, eliminating the volatile H₂S and ammonia plumes that trigger community complaints and regulatory scrutiny at dairy facilities.
Insulated Covers for Cold-Climate Dairies
The Hexprotect® MAX R insulated floating cover (R-17+) maintains lagoon temperatures above biological activity thresholds in northern dairy regions, reducing heating costs by up to 85% and shortening winter retention times.
Evaporation Reduction Up to 95%
Covering dairy lagoons with AWTT floating covers reduces evaporation by up to 95%, protecting lagoon capacity, maintaining nutrient concentrations within permit ranges, and eliminating freshwater makeup requirements in arid dairy regions.
Algae Blocking for Cleaner Effluent
AWTT floating covers block the sunlight that drives algal growth in dairy wastewater lagoons, reducing TSS and CBOD5 in effluent and supporting compliance with state wastewater discharge and land application permits.
Bird Exclusion & Biosecurity
With 99% surface coverage, AWTT floating covers deny waterfowl access to manure lagoon surfaces, reducing pathogen introduction risk and supporting the biosecurity protocols required by modern dairy certification programs.
Quick Facts — Dairies Floating Cover Performance
Recommended Products for Dairies
AWTT engineers recommend these floating cover systems for dairies applications.
Coverage: up to 99% | Odor reduction up to 90%
Hexprotect® AQUA
The leading choice for dairy manure lagoon applications. Up to 99% surface coverage creates the physical barrier needed to reduce ammonia nitrogen losses by up to 85%, suppress H₂S and odor emissions by up to 90%, block algae, and deter waterfowl.
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R-Value: ≥17 | –70°F frost resistance
Hexprotect® MAX R
Designed for dairy operations in cold climates. The R-17+ insulation layer maintains biological activity in lagoons through winter, reducing heating costs by up to 85% and ensuring year-round nitrogen treatment efficiency for nutrient management compliance.
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Evaporation reduction: up to 98%
Rhombo Hexoshield®
For dairy operations in arid climates where water conservation is critical, the Rhombo Hexoshield® achieves up to 98% evaporation reduction — the highest performance in the AWTT floating cover line — preserving lagoon capacity and preventing nutrient over-concentration.
Learn more →Frequently Asked Questions — Dairies
Common questions from dairies operators and engineers evaluating AWTT floating cover systems.
How much do floating covers reduce ammonia emissions from dairy manure lagoons?
Can floating covers help dairies meet EPA and state nutrient management requirements?
Are floating covers compatible with manure lagoon agitation and pumping equipment?
What floating cover system is best for dairy operations in cold northern climates?
Ready to Solve Your Dairies Water Storage Challenges?
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Engineering Tools & Resources
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Technical Specifications
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