The object of the study is the distillary stillage storage located within the boundaries of the federal protected area “Samarskaya Luka”, near the village of Rozhdestveno in the Samara region. Testing of the technology for utilizing long-term storage distillery waste (stored in the environment for more than 3 years) through aerobic composting at an industrial site has been conducted. During the three-week composting cycle, measurements of temperature and the chemical composition analysis of the composting mass were conducted. The volumetric fractions in the initial compostable mixture, including long-stored dis-
tillery stillage, immature (recycled) compost, and sawdust, were 30–35% for each of the components. In the selected samples, the following parameters were monitored: moisture, pH, and the content of organic matter, as well as nitrate (N-NO3-), nitrite (N-NO2-), and ammonium nitrogen (N-NH4+). Aldehydes, ketones, esters, higher alcohols, organic acids (including aromatic)content was also determined. Only acetic and butanoic acids with a slight difference of 0.91 mg/kg were detected when assessing the concentration of organic components in samples taken after the second and third week of composting. There wasa significant decrease in the N-NH4+ and N-NO2- content as well as an increase in N-NO3- content after two weeks of composting. As a result of composting, the proportion of organic matter decreased, and the pH stabilized to values above 6.0 units. The results of the experiment demonstrated the effectiveness of aerobic composting as a method for the disposal of distillery stillage. The addition of recycled compost and sawdust contributed to reducing the duration of composting from 21 to 14 days.
ISSN 1995-4301
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