Research
R&D Bio-Engineering
Our research starts with questions from pond and tank operations, aquafeed mills and water treatment plants. We study how microbes perform in those environments, from a pond bottom to a feed extrusion line.
Seven research programs explore water quality, spore delivery and aquatic animal health.
Fig. 01–07Conceptual illustrations of the organisms and processes under study.
01 / 03
Water, pond and tank systems
How selected cultures behave in pond and tank water, pond bottoms and treatment systems.
Processing microbial cultures for phosphate management
We study how downstream processing affects the ability of selected cultures to take up dissolved phosphate once their cells are active. The work is relevant to nutrient management in ponds and treatment systems.
Fig. 01Active cells among dissolved phosphate in water. Acclimating cultures to nitrite
We investigate how selected bacterial cultures respond to nitrite in pond and treatment water. Monitoring nitrite over time helps assess whether conditioning supports more consistent conversion.
Fig. 02Bacterial cultures in nitrite-bearing water. Microbial sulfide conversion
We evaluate selected bacteria for their ability to transform dissolved sulfide under conditions relevant to pond bottoms and treatment media.
Fig. 03Bacteria above a pond-bottom sediment layer with dissolved sulfide.
02 / 03
Aquafeed processing and spore delivery
What happens to spores on the way from an aquafeed line to the place where they are meant to work.
Heat-tolerant spores for aquafeed extrusion
We measure how many bacterial spores remain viable after aquafeed extrusion. A process temperature of 120 °C is a research target. Recovery is evaluated under the conditions of each feed line.
Fig. 04Spores passing through a heated feed extruder. Timing spore germination
We study when dormant spores begin to germinate under conditions found at the intended site of use. The timing of that transition matters for when cells can become active.
Fig. 05A dormant spore, a germinating spore and an active cell. pH-responsive spore coatings
We investigate coatings that respond to changes in pH and release intact spores in the intended environment. Release from the coating and subsequent germination are evaluated separately.
Fig. 06A coating opens to release an intact spore.
03 / 03
Aquatic animal health
How the crustaceans under study respond to spore-based preparations.
Immune priming in crustaceans
We study whether spore-based preparations can prime the innate immune response of crustaceans. Controlled challenge studies help assess the response and survival of the animals under study.
Fig. 07A crustacean, an immune cell and a spore.
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