Enzymatic characterization of microbial isolates from lignocellulose waste composting: Chronological evolution
Successful composting is dependent upon microbial performance. An interdependent relationship is established between environmental and nutritional properties that rule the process and characteristics of the dominant microbial communities. To reach a better understanding of this relationship, the d...
| Main Authors: | , , , , , |
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| Format: | info:eu-repo/semantics/article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10835/14962 https://doi.org/10.1016/j.jenvman.2014.06.019 |
| Summary: | Successful composting is dependent upon microbial performance. An interdependent relationship is
established between environmental and nutritional properties that rule the process and characteristics
of the dominant microbial communities. To reach a better understanding of this relationship, the dynamics
of major metabolic activities associated with cultivable isolates according to composting phases
were evaluated. Ammonification (72.04%), amylolysis (35.65%), hemicellulolyis (30.75%), and proteolysis
(33.61%) were the more frequent activities among isolates, with mesophilic bacteria and fungi as the
prevalent microbial communities. Bacteria were mainly responsible for starch hydrolysis, while a higher
percentage of hemicellulolytic and proteolytic isolates were ascribable to fungi. Composting seems to
exert a functional selective effect on microbial communities by promoting the presence of specific
metabolically dominant groups at each stage of the process. Moreover, the application of conglomerate
analysis led to the statement of a clear correlation between the chronology of the process and characteristics
of the associated microbiota. According to metabolic capabilities of the isolates and their density,
three clear clusters were obtained corresponding to the start of the process, including the first thermophilic
peak, the rest of the bio-oxidative stage, and the maturation phase. |
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