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По запросу «pond» — результатов: 46: Словари

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Biological ponds английский

ponds used for biological treatment of sewage. Used independently – for treatment by micro-organisms and algae of sinks, saturated with easily oxidizing organic matters, or as the intermediate objects between the industrial treatment facilities and the natural water receivers. They operate by a principle of self-treating of water, accrue sludgy mass which can be used in agriculture as fertilizer or as a raw material for its production.

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