12. Analysis of energy consumption of the process of composting dairy sludge in hyperbaric conditions

Analiza energochłonności procesu kompostowania osadów mleczarskich w warunkach hiperbarycznych
 Bryan Romankiewicz, Michał Reguła, Rafał Różański, Marta Potempska, Błażej Gaze, Bernard Knutel, Paulina Wojtko, Iryna Drozdovych, Krzysztof Kawa
dairy sewage, composting, energy consumption
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The article presents the results of the energy consumption analysis of the process of composting dairy sewage sludge in hyperbaric conditions. The experiment assumed eight different tests, four of which took place with an air exchange frequency (tAE) of 4 h, and another four with tAE = 8 h. Additionally, the tests were carried out in four different pressure variants: 0 kPa (atmospheric pressure), 50 kPa, 100 kPa and 150 kPa. All tests were based on the same input material, characterized by an original humidity of 80% and a mass of 2000 g. During the sewage sludge composting process, various parameters of the obtained compost were analyzed, including moisture content, pH, loss on ignition (LOI), C:N ratio, nutrient content (P, K), and microbial respiratory activity (AT4). Electricity consumption was measured for each of the eight experiments, and the results were analyzed. The research aimed to determine the impact of various factors on the composting process and electricity consumption.