https://doi.org/10.15255/KUI.2019.029
Published: Kem. Ind. 68 (9-10) (2019) 381–388
Paper reference number: KUI-29/2019
Paper type: Original scientific paper
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Composting of Agroindustrial Waste, Biowaste and Biodegradable Municipal Solid Waste in Adiabatic Reactor

D. Kučić Grgić, F. Briški, V. Ocelić Bulatović, M. Vuković Domanovac, T. Domanovac, M. Šabić Runjavec, M. Miloloža and M. Cvetnić

Abstract

The aim of this work was biological treatment of agroindustrial waste (P1), biowaste (P2) and biodegradable municipal solid waste (P3) by the composting process in adiabatic reactor during 21 days. In experiments P1, P2, and P3, a maximum temperature of 52, 55, and 57 °C was reached, and the thermophilic phase lasted 8, 5, and 6 days. The cumulative evolved CO₂ and NH₃ was 122, 407, and 389 g kg_VM0^–1 and 89, 148, and 559 mg kg_VM0^–1, respectively. The pH value at the beginning of the process was in the neutral and at the end in the slightly alkaline domain. The substrate humidity increased by about 5 %, while the C/N ratio decreased due to a decrease in the organic C content and an increase in N content. Consequently, a conversion of 48 %, 71 %, and 56 %, respectively, was achieved in experiments P1, P2, and P3.

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Keywords

agroindustrial waste, biowaste, biodegradable municipal solid waste, composting process, adiabatic reactor