Abstract
The main component of waste water of livestock enterprises is the urine of cattle and pigs. The chemical composition of urine is determined by diet and animal species and can not be changed under any techniques. Analysis of water balances allows to make the conclusion that the termination of the reset of highly concentrated waste water by recycling in hydroponicum opens up the prospect of the creation of undrained water supply in animal breeding farms. The use of household waste water for the purposes of technical water supply will allow dramatically reduce the withdrawal of fresh water from a natural water pool, and discharge into it of waste water. Implementation of complex of measures on rational use of water in livestock enterprises allows to move from the closed water systems of individual plants (production of green feed by hydroponic method) to undrained water supply enterprises at all.
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