I am looking for out-door aquaculture technique which takes advantage of gravity so as to conserve energy inputs. Are there such techniques available, I am particularly interested in algae. Any comments in this aspect is highly appreciative.
Yes, many outdoor systems utilize gravity to minimize energy inputs. The only drawback is that these systems tend to be flow-through. For example, some freshwater ornamental aquaculture farms are sited on the sides of hills or mountains below natural springs. Water is channeled from the spring through the farm and flows via gravity through ponds, raceways or other culture systems and is then released into water treatment ponds sited at the lowest point on the farm. The water is then evaporated or treated and released. Gravity-fed flow-through may be good for macro-algae, but would be impractical for micro-algae given the difficulties of retaining microalgae within your culture system.
A method that may be applicable in recirculating microalgae culture systems would be airlift - pumping air into the water as a method for lifting water. A basic explaination can be found here:
https://en.wikipedia.org/wiki/Airlift_pump
Air pumps can be more energy efficient than water pumps in some situations, but this will depend on the size and requirements of your system.
The best way to reduce energy costs in any recirculating system is to minimize head height - the difference in height between the lowest point in the system and the highest. For example, using gravity to return water from a header tank or filtration system held above a culture tank still requires the water to be pumped against gravity to the height of the header tank/filtration system. In contrast, using a filtration system that sits only slightly above horizontal with the culture tank minimizes the height that water must be pumped against gravity.
https://en.wikipedia.org/wiki/Airlift_pump
Gravity based aquaculture techniques r available for exotic tryouts,Indian tryouts,Chinese craps,managers in hills .in culture practice the eater is drawn from a stream,retained in pond in desire quantity and period,feeding.g process is modified in frequency,quantity and type of feed pallets needed. The water is caramelized microphones in series of parallel series and drained from th Farmington stream. The drained water again can be reused for fish culture without disturbing the needs of other stake holders of stream water.sorry no idea 2 culture algae in such waters.
Koushik thanks for updates, Could you send me some links for outdoor recirculatory aquaculture systems?
- Badges
- Science topic
- Similar topics
- Chemistry
- Biochemistry