Showing a Recirculating Aquaculture System in Action
Vložit
- čas přidán 23. 04. 2024
- Tyler Firkus, UWSP NADF Facility Operations and Research Programs Manager, walks through the facility's two, semi-commercial scale recirculating systems, highlighting important equipment and components utilized.
- Věda a technologie
Really great video man! I have not found such informative video about RAS than this video. For me it is fascinating, thank you man!
youtube.com/@aquacultureguru178?si=o4GGc5y-Xlam90qE
Hi , i 'm curious how you make the water circulation flow in a circular motion in the tank
Hello @YeeKhaiify we can do this several different ways. In our Atlantic salmon tanks, the tanks have been manufactured with water jets that are formed into the side of the fiberglass tank. The inflow water is supplied to these jets to create velocity in one direction. In addition, we can also create velocity using a capped PVC pipe with holes drilled down in a line for our inflow pipe. The size and amount of holes determines the velocity of flow (larger and more holes creates lower velocity, fewer and smaller holes creates greater velocity). I would be happy to discuss or send photos, email us at: ehauser@uwsp.edu
What are you doing with the solids wastes? I am guessing that it can be used as a soil amendment or fertilizer for growing food. Like using it to grow duckweed or other plants to feed back to the fish?
The effluent stream is sent to a settling basin where we collect the solids and can land apply as fertilizer, we donate this fertilizer to local farmers. The water that overflows the settling basin then is sent to a created wetland where nutrients are taken up by cattails and wild rice. Both the settling basins and wetland size was designed to handle a maximum feed load for our facility.
@@uw-stevenspointnorthernaqu8491 That is good to hear.
@@uw-stevenspointnorthernaqu8491 How many kilowatts of energy do you consume per month?
So are you using nano bubbles to oxygenate the water?
We have done research on nano bubbles but in these two RAS in this video, we are not using nano bubble technology, we are using oxygen speece cones (for our warm water system) and low head oxygenation unit (four our cold water system).
I have a question my friend: How many kilowatts of energy do you consume per month?
@uw-stevenspointnorthernaqu8491
Hello @gabimatei855 our facility is 8500 square-foot production barn (what you are seeing in the video) which has the two RAS along with incubation, larval and flow through systems. We also have four half acre ponds that utilize power for aeration throughout the summer months. It is difficult for us to give you an exact number for one of our RAS apart from everything else, but an estimate would be around 28600 kilowatt hours per month for one of the RAS systems. The salmon RAS has three, 4hp, 3-phase pumps running consistently, which is most of the systems energy consumption.
@@uw-stevenspointnorthernaqu8491 Thanks for your response. I wanted to calculate roughly how much I would consume if I opened a 600 square meter facility. If I had two pumps, I still think that I would consume around 2000 kilowatts/per month.
I don't know much at the moment, I'm new to this topic but I'm documenting myself day by day. Thank you for your answer!
@@gabimatei855 if you are pursuing RAS, it is critical that you utilize a proven system and design. If you like we can share with you some further resources for this, feel free to contact us: ehauser@uwsp.edu
Seems like a large expense to grow fish this way. How much co2 is generated doing all of this?
CO2 levels is of course dependent on the species, age, water temperature and more factors, we have make up air units in the facility that remove the CO2 from the facility and bring fresh air in. Yes RAS can be an expensive system but also enables optimal control over the fish environment while reusing water. Regardless, economic and biological planning is critical for these systems to be economically sustainable and successful.
So you always have some water that is waste water? That dirty water could also be used to help grow plants for food, right?
Depending on the project, system and densities, we do have some overflow or supplemental water that is coming into the system as makeup water. This gives us a bit of a buffer for water quality, cleaning, evaporation, etc. Yes, this water could be collected and used as irrigation or sent to a separate aquaponics set up. Please reach out to us and I can explain further: ehauser@uwsp.edu
youtube.com/@aquacultureguru178?si=o4GGc5y-Xlam90qE