Partial Recirculating Aquaculture System
Вставка
- Опубліковано 2 вер 2015
- The University of Wisconsin-Stevens Point Northern Aquaculture
Demonstration Facility is demonstrating a partial recirculation system which enables 50-70% water reusage without the use of a biofilter or drum filter. More information visit: www.uwsp.edu/cols-ap/nadf/Pag... - Наука та технологія
Thank you for this video. This is what we need, a cost effective solution. All other RAS videos have been about expensive solution. Problem is not everyone has the money to support such project.
Thanks for the comment Dylan, if you want more details on this please visit: www3.uwsp.edu/cols-ap/nadf/Pages/New-Outdoor-Demonstration-Building.aspx
Do you guys think RAS would work in a country where summers are hot, and winters are cold ???
Our system is located in Northern Wisconsin and raises cold water species. During the hot months we can add more fresh water (at 8deg C) to cool if needed. Winters we also can adjust flow and open valves to prevent freezing drains. For example, sometimes, the bottom drain water is wasted from the system (bottom drain valve is left open) and only side drain water is reused to prevent bottom drains from freezing.
Amazing..👍
sorry to be so off topic but does anyone know of a trick to log back into an Instagram account?
I somehow forgot my login password. I appreciate any assistance you can offer me!
@Timothy Kyler Instablaster :)
@Casen Ace Thanks for your reply. I got to the site on google and im in the hacking process atm.
Takes quite some time so I will get back to you later with my results.
@Casen Ace It worked and I finally got access to my account again. I'm so happy!
Thanks so much, you really help me out!
@Timothy Kyler Glad I could help xD
How much cost for this project
I’m curios. I thought pvc was infused with an anti microbial and that pvc glue and primer were toxic. Is there a way you solve this problem or does that amount not effect the fish
Hello Makayla, thank you for your question. UWSP NADF has always used PVC, primer and glue. We let the glue cure properly (for at least 24 hours) and let the systems run and rinse thoroughly several times before the addition of fish. We have raised over 15 different species of fish on site and have not had an issue with PVC glue or primer toxicity. Feel free to reach out with other questions: ehauser@uwsp.edu
Mam can you explain where over flow water going from sunk?
The overflow from the sump is precautionary to ensure we have enough water flow into the sump. The water leaving the sump combines with our effluent to our settling ponds and created wetland
How much biomass can this support - lbs per cubic meter?
This will depend on species and water quality of the system but we suggested about 60kg/m3 which is about 0.5lb/gallon. Oxygen became a limiting factor in this system with cold water trout species, higher densities may require oxygen supplementation as well as careful monitoring of other water quality factors such as CO2. Contact for more information: ewiermaa@uwsp.edu
which bio filter using there ?
This system does not require a biofilter, we are exchanging enough water through partial reuse and keeping densities low enough to not accumulate toxic levels of ammonia
Can somebody acquire this system?
The system was designed by an experienced design team, but the tanks with radial flow settlers attached can be purchased email ewiermaa@uwsp.edu if would like further information on that contact.
Could you tell me what is the percentage of reused water flow in total flow rate ?
Hello, thank you for your question, generally this system has about a 60% water reuse potential, mainly the limiting factor was oxygen. Again, this system does not have a drum filter or biofilter so we relied on the fresh water to flush ammonia and solids from the system. We had 8 tanks in this system, calculation for reusing the water is approximated here:
8 tanks 2000L each, 2 exchanges an hour
8X2000X2=32000 Liters per hour 533LPM 141Gallons per minute
60% of that is 19200LPH of recirc water
19200/60=320LPM, about 85 Gallons per minute.
The remaining is 12800LPH = 213LPM or 56GPM fresh water.
@@uw-stevenspointnorthernaqu8491 Where does this new water come from because 56 gpm is a lot of water, 3360 gph, or 80000 gallons per day . That would be expensive here. About 84 dollars a day or 2400 a month.
@@vtecmissle thanks for your question. The facility has two high-capacity wells, they are able to provide around 800 gallons per minute each, although generally we are using a maximum of 500 gallons per minute for the entire research facility, most of this flow is going to our flow through larval and raceway systems. Yes, depending on your location, 56 gallons per minute may be significant to run, but this idea was comparing against a flow through system. In that case we would have to run 141 gallons per minute if this system was flow through. This system was created as a way to save water without using a drum or biofilter.
We need caption by Arabic and Spansh please for we can helpers American product selling international