The theoretical and experimental study of wastewater treatment technology pools for pinnipeds content for their return to the use of recycling. The quantitative and qualitative composition of impurities in the pool enclosure for pinnipeds. The technology of cleaning, proven on existing dolphinarium in Gelendzhik. Experimental results presented in the paper allow us to recommend the proposed technology for use. The paper presents results of calculation of the economic efficiency of the proposed technology. Keywords: dolphin, waste water treatment, sea water, pinnipeds, ultraviolet light, ozone filtration.
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