It has been found that the strain Chlorella vulgaris AK №. 001 eliminates the unpleasantodour in the samples of waste water and sewage sludge even on the 16-17th days of the carried out investigation. In terms of the
samples with the lowest concentration of sewage sludge, the unpleasant odor disappears rapidly. For the sample «Sludge + wastewater + Chlorella vulgaris AK №. 001 - 6.25ml / 43.75ml», there has been a sufficient amount of initially applicated cells with a titer of 10 million. There was also a noticeable improvement in the turbidity of the studied samples. On the 20th day of this research, samples with the lowest concentration of sewage sludge had got opalescence. The decrease in pH of these samples has occurred so this amount has dropped from an alkaline value (9.5)
to a neutral value (7). The greatest number of cells of the strain Chlorella vulgaris AK №. 001 in samples, in which the only source of nutrition was the contaminants present in them, has been obtained on the 15th day from the moment the experiment began. On the 17-20 days of the study, the phase of cell death has begun.

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