ASTRAL Project - Integrated Multi-Trophic Aquaculture System at Federal University of Rio Grande 🇧🇷
Вставка
- Опубліковано 21 кві 2022
- Prof. Dr. Luis Poersch introduces our Integrated Multi-Trophic Aquaculture System at Federal University of Rio Grande, Brazil.
First discussing Shrimp and Biofloc, with an amazing 450-500 Shrimp per square metre, FURG are using Biofloc to maintain the water quality in the tank. Biofloc is responsible for consuming the amonia & nitrites, transforming these nutrients into nitrates! As the biofloc increase during this process, the water needs to be transported to a separate tank where Tilapia will eat the biofloc. From here, the water is filtered into another tank where green seaweed known as 'Ulva fasciata' is present. This seaweed is responsible for reducing nutrients; phosphates and nitrates, which allows the water to be filtered and moved back into the Shrimp tank, recirculating the water 🔄💧
Continue watching to learn more! 💡
All Atlantic Ocean Sustainable, Profitable and Resilient Aquaculture (ASTRAL) is a Horizon 2020 collaborative project that focuses on integrated multi-trophic aquaculture (IMTA) farming and defines, supports and promotes this type of sustainable aquaculture production in the Atlantic area. The project spans three continents in order to ensure a reliable solution applicable in all Atlantic regions. It will bring together labs in Ireland and Scotland (open offshore labs), South Africa (flow-through inshore) and Brazil (recirculation inshore) as well as Argentina (prospective IMTA lab).
For further information, please visit www.astral-project.eu
Follow ASTRAL on social media for regular project updates! 🦞 🌊
Twitter: @ASTRAL_H2020
Linkedin: @ASTRAProject
Facebook: @ASTRALH2020
The ASTRAL project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 863034 🇪🇺
This material reflects only the author’s view and the Commission is not responsible for any use that may be made of the information it contains. - Наука та технологія
Um forte abraco meu querido professor.
Great !
Thank you for the video. Few questions, appreciate the response.
1. What's the salinity of the system, tilapia can't tolerate higher than 8ppt, but shrimp may need higher than that?
2. The water is cycled multiple times?
3. How to estimate the seaweed needed to remove the nitrates?
4. Why the seaweed tank is aerated? Circulation is needed to expose the weed to light?
We use salinity 20 in the system and we don't have problems with tilapia mortality. The water is circulate 24 hours per day / 7 days a week by submersed pomp (700L/h) and the seaweed density is 1g/L of water.
We keep the aeration in all tanks to avoid Biofloc sedimentation and we use baskets to maintain the seaweed in the surface (no more than 20 cm), where the light is adequate. The Biofloc affect negatively the light in the water column.
@@luispoersch7100 Thank you for answering. In the beginning of the culture, the water do not have biofloc, so I believe there can be ammonia spikes. Do you recommend to begin with heterotrophic and slowly convert it to mixotrophic or fully Autotrophic?
Dr Luis, how many times have you harvest shrimp in this system? cycles.
The shrimp harvest occur every 110 days with no water renewal.
Training
Teach me the set up please