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.

@uw-stevenspointnorthernaqu8491

2 жыл бұрын

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 ???

@uw-stevenspointnorthernaqu8491

5 жыл бұрын

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.

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

@uw-stevenspointnorthernaqu8491

Жыл бұрын

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?

@uw-stevenspointnorthernaqu8491

5 жыл бұрын

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 cost for this project

How much biomass can this support - lbs per cubic meter?

@uw-stevenspointnorthernaqu8491

3 жыл бұрын

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 ?

@uw-stevenspointnorthernaqu8491

5 жыл бұрын

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

Amazing..👍

@timothykyler5845

2 жыл бұрын

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!

@casenace5722

2 жыл бұрын

@Timothy Kyler Instablaster :)

@timothykyler5845

2 жыл бұрын

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@timothykyler5845

2 жыл бұрын

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@casenace5722

2 жыл бұрын

@Timothy Kyler Glad I could help xD

Can somebody acquire this system?

@uw-stevenspointnorthernaqu8491

5 жыл бұрын

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.

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Could you tell me what is the percentage of reused water flow in total flow rate ?

@uw-stevenspointnorthernaqu8491

6 ай бұрын

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.

@vtecmissle

5 ай бұрын

@@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.

@uw-stevenspointnorthernaqu8491

5 ай бұрын

@@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.