A two-step composting process for woody resources
| Autor: | Yoshimasa Takahara, Akio Mimura, Masaaki Kakezawa |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
chemistry.chemical_classification
Chemistry Compost fungi food and beverages Fraction (chemistry) engineering.material Pulp and paper industry complex mixtures Applied Microbiology and Biotechnology chemistry.chemical_compound Botany engineering Cation-exchange capacity Lignin Humic acid Degradation (geology) Fermentation Water content Biotechnology |
| Zdroj: | Journal of Fermentation and Bioengineering. 70:173-176 |
| ISSN: | 0922-338X |
| Popis: | A novel process has been developed for converting woody resources into compost with high cation exchange capacity and humic acid content by two-step fermentation. The 1st step consists of lignin degradation with Coriolus versicolor, while the 2nd step is a general composting procedure. The influence of the degradation conditions (initial C/N ratio, temperature and moisture content) on the degradation of beech wood lignin by C. versicolor was studied in order to develop a composting process from woody resources. The lignin degradation rate, which was maximal with no added nitrogen source, was 23% and 31% after 4 weeks and 8 weeks of fermentation, respectively. The fulvic acid fraction increased as lignin degradation progressed, indicating that the precursor of humic acid was formed and accumulated as the result of lignin degradation. The cation exchange capacity and humic acid content of the compost after two-step fermentation reached 93 meq/100 g and 5.3%, respectively, as compared to 65 meq/100 g and 3.0%, respectively in fermentation using the 2nd step alone. |
| Databáze: | OpenAIRE |
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