Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues
Abstract Purpose Stevia rebaudiana residues composting is studied and optimized using a central composite experimental design Methods The influence of controllable composting variables [moisture (40–70%), aeration (0.05–0.30 Lair min−1 kg−1), and time (0–50 days)] on the temperature history and the...
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| Format: | Article |
| Language: | English |
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OICC Press
2018-08-01
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| Series: | International Journal of Recycling of Organic Waste in Agriculture |
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| Online Access: | http://link.springer.com/article/10.1007/s40093-018-0214-x |
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| author | J. J. Castro-Fernández A. Serrato-González M. Ruiz-Montoya M. J. Díaz |
| author_facet | J. J. Castro-Fernández A. Serrato-González M. Ruiz-Montoya M. J. Díaz |
| author_sort | J. J. Castro-Fernández |
| collection | DOAJ |
| description | Abstract Purpose Stevia rebaudiana residues composting is studied and optimized using a central composite experimental design Methods The influence of controllable composting variables [moisture (40–70%), aeration (0.05–0.30 Lair min−1 kg−1), and time (0–50 days)] on the temperature history and the properties of the compost (pH, organic matter) produced to determine suitable composting conditions. Mass balance and emitted gases of all the composting reactors have been done. Results Compost with high degradation entails operating at 50 days of composting under high moisture content (70%) and aeration level with values close to 0.05 Lair min−1 kg−1. Moreover, the composting process kinetic for Stevia rebaudiana residues has been studied. The magnitude of the kinetic parameters on the studied conditions varies among 1/42 and 1/46 for 1/K 1 and 0.15 and 1.6 for K 2. Where 1/K 1 is a value that measures the affinity between microorganisms and substrate and K 2 depends on the composting variable optimization. Conclusions Both moisture and aeration affects positively and negatively the composting process. Moreover, low effect of aeration has been found. The values of 1/K 1 and K 2 obtained showed higher values (higher degradation kinetic) under 55% moisture content and 0.30 Lair min−1 kg−1. |
| format | Article |
| id | doaj-art-a17ef39efa5a4d61bf76dc8ce6557a80 |
| institution | Kabale University |
| issn | 2195-3228 2251-7715 |
| language | English |
| publishDate | 2018-08-01 |
| publisher | OICC Press |
| record_format | Article |
| series | International Journal of Recycling of Organic Waste in Agriculture |
| spelling | doaj-art-a17ef39efa5a4d61bf76dc8ce6557a802025-02-03T09:59:39ZengOICC PressInternational Journal of Recycling of Organic Waste in Agriculture2195-32282251-77152018-08-017427728610.1007/s40093-018-0214-xInfluence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residuesJ. J. Castro-Fernández0A. Serrato-González1M. Ruiz-Montoya2M. J. Díaz3Chemical Engineering Department, Facultad de Ciencias Experimentales, Chemical Process and Product Technology Research Center (Pro2TecS), Universidad de HuelvaChemical Engineering Department, Facultad de Ciencias Experimentales, Chemical Process and Product Technology Research Center (Pro2TecS), Universidad de HuelvaChemical Engineering Department, Facultad de Ciencias Experimentales, Chemical Process and Product Technology Research Center (Pro2TecS), Universidad de HuelvaChemical Engineering Department, Facultad de Ciencias Experimentales, Chemical Process and Product Technology Research Center (Pro2TecS), Universidad de HuelvaAbstract Purpose Stevia rebaudiana residues composting is studied and optimized using a central composite experimental design Methods The influence of controllable composting variables [moisture (40–70%), aeration (0.05–0.30 Lair min−1 kg−1), and time (0–50 days)] on the temperature history and the properties of the compost (pH, organic matter) produced to determine suitable composting conditions. Mass balance and emitted gases of all the composting reactors have been done. Results Compost with high degradation entails operating at 50 days of composting under high moisture content (70%) and aeration level with values close to 0.05 Lair min−1 kg−1. Moreover, the composting process kinetic for Stevia rebaudiana residues has been studied. The magnitude of the kinetic parameters on the studied conditions varies among 1/42 and 1/46 for 1/K 1 and 0.15 and 1.6 for K 2. Where 1/K 1 is a value that measures the affinity between microorganisms and substrate and K 2 depends on the composting variable optimization. Conclusions Both moisture and aeration affects positively and negatively the composting process. Moreover, low effect of aeration has been found. The values of 1/K 1 and K 2 obtained showed higher values (higher degradation kinetic) under 55% moisture content and 0.30 Lair min−1 kg−1.http://link.springer.com/article/10.1007/s40093-018-0214-xStevia rebaudiana residuesComposting controllable variablesComposting kinetic |
| spellingShingle | J. J. Castro-Fernández A. Serrato-González M. Ruiz-Montoya M. J. Díaz Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues International Journal of Recycling of Organic Waste in Agriculture Stevia rebaudiana residues Composting controllable variables Composting kinetic |
| title | Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues |
| title_full | Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues |
| title_fullStr | Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues |
| title_full_unstemmed | Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues |
| title_short | Influence of controllable variables on the composting process, kinetic, and maturity of Stevia rebaudiana residues |
| title_sort | influence of controllable variables on the composting process kinetic and maturity of stevia rebaudiana residues |
| topic | Stevia rebaudiana residues Composting controllable variables Composting kinetic |
| url | http://link.springer.com/article/10.1007/s40093-018-0214-x |
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