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These flies are commonly encountered in temperate areas of Europe, Siberia, and northern China. They have been introduced to North America. [12] They are parasites of elk, deer, and other deer family members, burrowing through the fur and sucking the blood of the host animals. Adults are only 5–7 mm (0.20–0.28 in) in length and brownish in ...
One commonly-used tool to reduce the severity of these lake management problems is to eliminate or lessen thermal stratification through aeration. [2] Many types of aeration equipment have been used to reduce or eliminate thermal stratification. Aeration has met with some success, although it has rarely proved to be a panacea. [10]
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The ponds or basins may range in depth from 1.5 to 5.0 meters. [ 6 ] In a surface-aerated system, the aerators provide two functions: they transfer air into the basins required by the biological oxidation reactions, and they provide the mixing required for dispersing the air and for contacting the reactants (that is, oxygen, wastewater and ...
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To minimize leakage of animal waste into the ground water, newer lagoons are generally lined with clay [8] Studies have shown that in fact the lagoons typically leak at a rate of approximately 1 millimetre (0.04 inches) per day, with or without a clay liner, [9] because it is the sludge deposited at the base of the lagoon that limits the ...
Aeration (also called aerification or aeriation) is the process by which air is circulated through, mixed with or dissolved in a liquid or other substances that act as a fluid (such as soil). Aeration processes create additional surface area in the mixture, allowing greater chemical or suspension reactions.
Chrysopsinae is an insect subfamily in the family Tabanidae commonly known as deer flies or sheep flies and are bloodsucking insects considered pests to humans and cattle. [3] They are large flies with large brightly-coloured compound eyes, and large clear wings with dark bands. [4] They are larger than the common housefly and smaller than the ...
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