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Composting process parameters of different types of manure in a bioreactor

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dc.contributor.authorBojarski, W.
dc.contributor.authorCzekała, W.
dc.contributor.authorNowak, M.
dc.contributor.authorKupryaniuk, K.
dc.contributor.authorMachaieie, L.
dc.date.accessioned2026-08-12T06:33:47Z
dc.date.available2026-08-12T06:33:47Z
dc.date.issued2026
dc.descriptionReceived: February 12th, 2026 ; Accepted: June 18th, 2026 ; Published: June 30th, 2026 ; Correspondence: wiktor.bojarski@up.poznan.pleng
dc.description.abstractComposting has been practiced since ancient times, where it was used to enhance soil fertility and support crop production. It is therefore regarded as the oldest known method of biowaste treatment. Over time, the process has been systematically optimized through studies on the dynamics of aerobic biodegradation of various organic substrates, making it one of the most extensively investigated biological treatment technologies. Despite this long history, composting remains an important research topic, particularly in the context of circular economy strategies and sustainable development objectives. The aim of this study was to evaluate the composting dynamics of manure-based substrates differing in manure type, moisture content, and structural properties under controlled aerobic conditions. Experiments were conducted at the Ecotechnology Laboratory of the Poznań University of Life Sciences using four isothermal bioreactors (125 dm³ each) designed for controlled aerobic degradation. The tested materials included cattle manure (≈70% moisture), pig manure (> 80%), a mixture of cattle and pig manure (≈65%), and cattle manure (> 80%). During the process, O2 and CO2 concentrations, temperature, pH, bulk density, and mass loss were monitored, and dry matter, organic dry matter, organic carbon, and ash content were determined. The results showed clear differences in composting dynamics depending on manure type and moisture content. The cattle manure (70% moisture) exhibited rapid heating and a stable thermophilic phase, whereas highly moist pig manure showed slower temperature increase and lower intensity. The manure mixture demonstrated the highest microbiological activity, while excessive moisture in cattle manure (> 80%) reduced process efficiency. These findings confirm that manure type and moisture are key determinants of composting performance.eng
dc.identifier.citationBojarski, W., Czekała, W., Nowak, M., Kupryaniuk, K., & Machaieie, L. (2026). Composting process parameters of different types of manure in a bioreactor. Estonian University of Life Sciences. https://doi.org/10.15159/AR.26.050en
dc.identifier.issn2228-4907
dc.identifier.publicationAgronomy Research, 2026, vol. 24, no. 2, pp. 273–290eng
dc.identifier.urihttp://hdl.handle.net/10492/10965
dc.identifier.urihttps://doi.org/10.15159/ar.26.050
dc.publisherEstonian University of Life Scienceseng
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)eng
dc.rightsinfo:eu-repo/semantics/openAccesseng
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectcomposteng
dc.subjectcomposting processeng
dc.subjectmanure compostingeng
dc.subjectbioreactoreng
dc.subjectphysico-chemical changeseng
dc.subjectarticleseng
dc.titleComposting process parameters of different types of manure in a bioreactoreng
dc.typeArticleeng

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