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Recirculating aquaculture system. Recirculating aquaculture systems (RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. [ 1 ] Other types of filtration and environmental control are often also necessary to maintain clean water and provide a ...
Bio-degradation of ballast tank coatings takes place in marine environments. Ballast tanks usually carry bacteria and other organisms, some of which can damage the ballast tank coating and structure. [9] Micro-cracks and small holes have been found in ballast tanks. Acidic bacteria created holes with 0.2–0.9 μm in length and 4–9 μm in width.
A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs. The lamps use a tube that is curved or folded to fit into the space of an ...
Ballast water discharges by ships can have a negative impact on the marine environment. The discharge of ballast water and sediments by ships is governed globally under the Ballast Water Management Convention, since its entry into force in September 2017. It is also controlled through national regulations, which may be separate from the ...
A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides [1][2] (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp. [1] Developed in the 1960s, they are similar to mercury vapor lamps, [1] but ...
It has a blue metal-and-glass exterior. The world's largest when it opened in November 2005, the aquarium originally encompassed 550,000 square feet (5.1 ha; 13 acres) of covered space, and its exhibits held 8 million US gallons (30,000,000 L) of fresh and saltwater.
Shedd Aquarium (formally the John G. Shedd Aquarium) is an indoor public aquarium in Chicago. Opened on May 30, 1930, the 5 million US gal (19,000,000 L; 4,200,000 imp gal) aquarium holds about 32,000 animals and is the third largest aquarium in the Western Hemisphere , after the Georgia Aquarium and Monterey Bay Aquarium .
Ballast. Cross section of a vessel with a single ballast tank at the bottom. Ballast is dense material used as a weight to provide stability to a vehicle or structure. Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or airship, to provide stability. A compartment within a boat, ship, submarine, or ...
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