Abstract
Sludge from a purification plant for waste waters are studied for presence of pathogenic and non-pathogenic microflora. Their disinfection is carried out by applying lime treatment (10%, 20%, 30% lime) with two species vegetation – lavender (Lavandula) and basil (Ocimum). The results obtained after the processing of the sludge about the quantity microflora in them are studied for presence of a correlation connection between the concentration of the lime solution and the quantity of microorganisms. The obtained results show a strong correlation connection among the studied quantities. This gives grounds to be looked for a mathematical model on description of the microflora quantity in the sludge. More factors are added for the purpose – temperature, humidity and pH. In the article are presented the regression equations for the different methods of disinfection. The results give grounds to be affirmed that most of them can be used successfully for finding the quantity microflora in studied sludge with known data for concentration of the solution, temperature, humidity and pH.
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