Large growing surface
Geometry is designed around light, climate, hydraulic performance, and site constraints.
The technology
Not a pond. Not a tube.
Open ponds and photobioreactors grow algae suspended in water. Aeroponic Algal Culture (AAC) is designed to supply nutrient-bearing water to algae growing on exposed, rigid surfaces.
The design thesis
Change the relationship between algae and water.
AAC treats wastewater primarily as a nutrient-delivery medium. The algae is intended to live on fixed, exposed infrastructure, not as a dilute suspension throughout the treatment volume.
Nutrient-bearing water is distributed across the surface. Algae grow as an attached biofilm, incorporating nitrogen and phosphorus into biomass. That biomass is removed directly from the rigid surface and measured as part of treatment performance.
The Ridges
Folded surface, fixed infrastructure.
The ridge geometry is intended to place substantially more active algal growing surface within a facility footprint while keeping the biofilm exposed and accessible.
Thin-film delivery
Nutrient-bearing moisture supplies attached growth without making the entire water volume the growth chamber.
Stationary surfaces
The primary growing surfaces remain fixed during normal operation.
Direct access
Exposed rigid surfaces are intended to support inspection, maintenance, and mechanical harvesting.
Why existing systems matter
AAC builds on decades of algal-cultivation and attached-growth work.
Earlier attached-growth systems demonstrated an important principle: algae can grow as a harvestable biofilm on a surface rather than remaining suspended throughout a water volume. AAC applies that principle to fixed, exposed, rigid infrastructure.
Open ponds
Shallow basins cultivate algae suspended throughout a large water surface.
Photobioreactors
Transparent tubes or panels cultivate suspended algae in a more enclosed and controlled water volume.
Attached-growth systems
Algae grow as a biofilm on media, making the biomass more accessible than a dilute suspended culture.
| Design challenge | Open ponds | Photobioreactors | Earlier attached-growth systems | AAC design intent |
|---|---|---|---|---|
| Light | Penetrates a shallow water layer; dense culture self-shades | Enters through transparent vessels; fouling can reduce transmission | Biofilm grows closer to light | Expose the active biofilm directly on fixed surfaces |
| Carbon transfer | Mixed through water or absorbed from air | Often injected and circulated | Varies by geometry | Use thin films and a large air-water-biofilm interface |
| Harvest | Separate dilute cells from the pond water | Separate suspended cells from the reactor water | Remove biofilm from media | Remove biomass directly from rigid surfaces |
| Surface density | Primarily horizontal | Determined by vessel geometry and spacing | Often limited by screen, belt, or support geometry | Fold active growing surface into a compact footprint |
| Infrastructure model | Pond earthwork | Specialized transparent process equipment | Often mechanical or flexible assemblies | Permanent civil infrastructure with serviceable equipment |
The signature mechanism
The harvest is the treatment.
Algal growth captures nutrients in biomass. Harvest completes the treatment by physically carrying that nitrogen and phosphorus out of the water system.
Assimilate
Algae and associated microorganisms incorporate available nutrients into cellular material.
Remove
Biomass is taken off the growth surface, carrying nutrients out of the water system.
Match biomass to a suitable use
Testing determines whether the harvested material is suited to industrial processing, energy recovery, nutrient recovery, or safe managed handling.
Designed around a treatment need
There is no single wastewater.
Every deployment must be configured around source water, nutrient load, flow, climate, land, treatment objectives, discharge requirements, biomass restrictions, and operating resources.
Begin with the actual stream.
Municipal effluent, food-processing water, direct industrial discharge, and agricultural drainage differ in nutrient form, organics, pathogens, contaminants, variability, and permitted downstream pathways.
Design inputSource characterization comes before facility
configuration.
Design for real conditions.
Temperature, solar exposure, wind, land, hydraulic elevation, service access, winter operation, and community context shape the facility.
Design inputGeometry and enclosure strategy must respond to the
site.
Size to mass, not appearances.
Flow and concentration determine the annual nitrogen and phosphorus load. Nutrient balance, availability, and carbon then constrain algal production.
Design inputLoad equals flow multiplied by concentration over
time.
Start with the treatment objective.
The relevant goal might be nitrogen reduction, phosphorus recovery, seasonal polishing, compliance, watershed restoration, industrial reuse, or an integrated combination.
Design inputThe facility is judged against the specific treatment
result agreed with the host.