Abstract
In the present work, the influence of feedstock composition (high and low lignin percentage) and addition of lignocellulose degrading bacterial isolates on final compost quality has been studied. The evaluation is based on respiration activity, temperature, nitrate and humic acid concentrations, elemental analysis, C/N ratio, pH, humic acids’ functional groups, and FTIR monitoring over the composting period. The results exhibited that the highest lignin feedstocks lead to higher respiration activity, spectral absorbance, total acidity, C/N ratio, nitrate concentration, pH, and temperature than low lignin feedstocks. Conversely, low lignin feedstocks generated higher humic acid and carboxylic group’s density than high lignin feedstocks. At the end of the composting period, FTIR absorption, oxygen, sulfur, and O/C ratio increased in all treatments while carbon, hydrogen, C/N, and H/C ratios decreased. Bacterial consortium addition to low/high lignin feedstocks contribute to a prolonged thermophilic phase for one and two days, respectively, shortening the compost production duration by about four and eight weeks, respectively.
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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.
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Arash Hemati: Conducted experimental verification, analyzed the data, and wrote the first draft and revised the manuscript.
Nasser Aliasgharzad and Reza Khakvar: Contributed to the research idea and designed the study.
Nasser Delangiz: Contributed to the wrote the first draft and revised the manuscript.
Behnam Asgari Lajayer: Contributed to the wrote the first draft, revised and submitted the manuscript.
Eric D. van Hullebusch: Helped with constructive discussions and revised the manuscript.
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Hemati, A., Aliasgharzad, N., Khakvar, R. et al. Bioaugmentation of thermophilic lignocellulose degrading bacteria accelerate the composting process of lignocellulosic materials. Biomass Conv. Bioref. 13, 15887–15901 (2023). https://doi.org/10.1007/s13399-021-02238-7
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DOI: https://doi.org/10.1007/s13399-021-02238-7