Traditional and advance technology in Aquaculture and Fisheries

Ultra violet system in Aquaculture

ULTRAAQUA UV systems continuously disinfect more than 100,000 m³/h of water in aquaculture systems. Millions of salmon, sturgeons, eels, turbot, sea bass etc. are produced in aquaculture systems worldwide. Here ULTRAAQUA UV systems have been chosen to increase security from infection diseases thereby protecting millions of invested dollars. Diseases such as Infectious Salmon Anemia (ISA) are prevented in Chile through the use of ULTRAAQUA UV systems. This has given the respected fish farms security and reassurance that the fish is not infected. The UV systems are also easy to maintain, the lamp lifetime is 16.000 hours guarantied and they do not take up time in the daily routines. This is why our UV systems are highly recommended and used in several hundreds of aquaculture systems worldwide. Water abundance and purity continue to decline while disease concerns found in source waters continue to increase. Simultaneously, increased consumption of fish has led to growing demands for higher stock densities in the same hatchery footprint. Aquafina UV Systems are perfect for use in: Fish hatcheries , Incubation, rehabilitation facilities, Depuration facilities, Aquariums Processing Plants Influent/effluent treatment

UV Applications in Aquaculture

  • Disinfection – the most common application of UV in water treatment. UV systems significantly reduce pathogen counts in incubation and rearing facilities and have proven to be the most cost-effective disinfection technology for the inactivation of many types of bacteria, viruses and parasites harmful to many species of fish.
  • Ozone Destruction – ozone is often used in a fish hatchery to enhance the quality of problematic water sources used for incubating and rearing fish. However, residual ozone in the water can be extremely toxic or fatal to the aquatic life being reared. UV light systems are applied to consume the residual ozone in the bulk water prior to contacting the fish.

Automatic Self-cleaning Micro screen Filters used in aquaculture

Aqua care specifies micro screen Filters as a highly efficient solids removal filter for aquaculture applications. It is effective for fine and soft solids removal.

The filter provides high capacity single stage filtration to gently separate soft solids with minimal head loss. The grid supported micro screen removes larger and fine particles. Screen sizes are available with openings as small as 15 microns. Most aquaculture operations use a screen opening of 60-100 microns. This makes the filter ideal for recirculation facilities where solids removal is essential for efficient performance of the bio-filtration system. Water flows through the lower part of the filter and through the moving filter drum. Solids in the water collect on the drum and are carried into the path of the screen wash spray, which blows the solids into the solids collection channel. The filter should be gravity fed to avoid particle size reduction by a pump impeller. The filter is continuously self-cleaning using cold water, with available periodic programmable hot water rinses to remove biological fouling that can eventually clog the screens. The filter operates with a low energy consumption. The Drum micro screen Filter features a stainless steel micro screen for strength and durability. The drum is turned by a fractional HP motor coupled to a heavy-duty permanently lubricated gear box. The strong motor and extra strength gearbox add to the filter’s service life significantly. Electronic variable speed controllers are standard. Solids dewatering is available as an option. The filters are available in many configurations including drop in channel mount units. All wetted parts used in manufacturing the filter are made of non-corrosive materials.

Aquaculture Pond Buoy

The Aquaculture Pond Buoy allows easy remote monitoring of dissolved oxygen levels and temperature in aquaculture pond raceways. The solar-powered buoy has an easy-to-use optical RDO Titan probe for 24-hour dissolved oxygen monitoring, plus a transceiver that transmits data wirelessly, right to your laptop or PC.

Features:

  • Rugged optical dissolved oxygen probe
  • Automatic temperature compensation
  • Solar panel and battery
  • Automated self-cleaning system
  • Automatic alarms via text message or email
  • Custom programming for your site’s needs

Benefits:

Save time, money, and labor — Reduces spot-checking rounds, automates aerator control and eliminates calibration for an entire season.

Mitigate risks — Automated real-time alerts reduce the risk of fish kills.

Increase yields – Real-time oxygen monitoring lets you optimize feed ratios while minimizing fish stress, disease and mortality.

Electro pulse fishing

Electrofishing is a technique whereby electrical energy is put into the water and fish .Electrofishing relies on two electrodes which deliver direct current at high-voltage from the anode to the cathode through the water. When a fish encounters a large enough potential gradient on this path, it becomes affected by the electricity. Usually pulsed direct current (DC) is applied, which causes muscular vibration in the fish, intercepting this energy, are drawn toward the probes and incapacitated in such a way that they can be captured with nets. The movement of fish toward the source of electricity is called galvanotaxis (uncontrolled involuntary muscular convulsion that results in the fish swimming toward the anode) and is believed to be a result of direct stimulation of the central and autonomic nervous systems which control the fish‘s voluntary and involuntary reactions.

The effectiveness of electrofishing is influenced by a variety of biological, technical, logistical, and environmental factors. The catch is often selectively biased as to fish size and species composition. When using pulsed DC for fishing, the pulse rate and the intensity of the electric field strongly influence the size and nature of the catch. The conductivity of the water, which is determined by the concentration in the water of charge carriers (ions), influences the shape and extent of the electric field in the water and thus affects the field's ability to induce capture-prone behavior in the fish.

How it actually works

When a fish swims into a weak electrical field, it's going to not be affected in the slightest degree. There's a threshold of electrical charge that has to be emitted into the water in order to effect on the fish. Once the electrical charge within the water is sufficient to allow transport of the charge across the nerve cells within the body, then the fish‘s muscles can endure involuntary contraction. The contractions can cause increased exercise of the muscle and a buildup of feed within the blood stream. This method is incredibly almost like what happens to the muscles of a runner or a swimmer UN agency exerts a great deal of exercise. The runner or swimmer might eventually get a cramp within the muscle and can't move it effectively. once the fish cramps up, it floats to the surface and removed from the electrical field. The method to stun a fish is sometimes five – ten seconds.

 

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