Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8869311 | Waste Management | 2018 | 7 Pages |
Abstract
The use of industrial Eucalyptus globulus bark residues for organic growing media formulation was studied. Hydrothermal treatments were tested using Response Surface Methodology approach. Model design consisted of twelve combinations of temperature (T: 60-140â¯Â°C) and residential time (t: 20-60â²) to evaluate the effect on bark properties. Temperature had a significant effect in C mineralization and N immobilization rates, where the lowest responses (111.8â¯mmol CO2 kgâ1â¯dâ1 and NIRâ¯=â¯4.1â¯mmolâ¯Nâ¯kgâ1â¯dâ1, respectively) compared to IEB (214.6â¯mmol CO2 kgâ1â¯dâ1 and 8.9â¯Nâ¯kgâ1â¯dâ1, respectively) were suggested after modeling at 40â¯Â°C during 70â². Industrial bark was phytotoxic and treatments were effective for phytotoxicity removal. Industrial bark presented high air content but low water availability; treatments had no effect on bark physical properties and the use of demineralized water may have leached nutrient content. Results from pot experiment recommend the use of 25% (v vâ1) of treated barks in future growing media formulations.
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Authors
C. Chemetova, A. Fabião, J. Gominho, H. Ribeiro,