Co-composting rice hulls and/or sawdust with poultry manure in NE Argentina |
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| Authors: | MC Leconte MJ Mazzarino P Satti MC Iglesias F Laos |
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| Institution: | 1. Microbiología Agrícola, FCA, Univ. Nac. Nordeste, Sargento Cabral 2131, 3400 Corrientes, Argentina;2. CONICET-CRUB, Univ. Nac. Comahue, Quintral 1250, 8400 Bariloche, Argentina;3. Sede Andina, Univ. Nac. Río Negro. Villegas 137, 8400 Bariloche, Argentina;1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China;2. Institute of Microbiology, Heilongjiang Academy of Sciences, 150010 Harbin, China;3. Institute of Advanced Technology, Heilongjiang Academy of Sciences, 150020 Harbin, China;4. State Key Laboratory of Urban Water Resource and Enviroment, Harbin Institute of Technology, 150090 Harbin, China;1. Laboratory of Ecology and Environment (L2E) (Unit Associated with the CNRST, URAC32), Faculty of Science Semlalia, Cadi Ayyad University, BP: 2390, Marrakesh, Morocco;2. Laboratory of Physico-Chemical of Materials and Environment (LPCME), Faculty of Science Semlalia, Cadi Ayyad University, BP: 2390, Marrakech, Morocco;3. School of Science and Engineering, Al akhawayn University in Ifrane, BP: 1846, Ifrane, Morocco;1. Centre for Environmental Risk Assessment and Remediation (CERAR), Building X, University Blvd., University of South Australia, Mawson Lakes, SA 5095, Australia;2. Cooperative Research Centre for Contaminants Assessment and Remediation of the Environment (CRC CARE), Building X, University Blvd., University of South Australia, Mawson Lakes, SA 5095, Australia;3. School of Natural and Built Environments, University of South Australia, Building P, Materials Lane, Mawson Lakes, SA 5095, Australia;4. Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Department of Soil Conservation and Waste Management, Campus Universitario de Espinardo, 30100 Murcia, Spain;5. Environmental and Natural Resource Management Consultants Pty Ltd, 59 Solomon St., Fremantle, WA 6160, Australia;6. Scientific and Technological Bio-recourse Nucleus, BIOREN-UFRO, Universidad de la Frontera, P.O. 54-D, Temuco, Chile;1. Aarhus University, Department of Engineering, Blichers Allé 20, DK-8830 Tjele, Denmark;2. Bangladesh Sugarcrop Research Institute, Ishurdi-6620, Pabna, Bangladesh;3. Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh;4. Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway;1. School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;3. School of Civil Engineering, Sichuan University of Science and Engineering, Zigong, 643000, China;1. Jiangsu Key Laboratory for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China;2. Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China |
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| Abstract: | Rice hulls and sawdust are two common C-rich wastes derived from rice and timber agro-industries in subtropical NE Argentina. An alternative to the current management of these wastes (from bedding to uncontrolled burning) is composting. However, given their C-rich nature and high C/N ratio, adequate composting requires mixing with a N-rich waste, such as poultry manure. The effect of different proportions of poultry manure, rice hulls and/or sawdust on composting efficiency and final compost quality was studied. Five piles were prepared with a 2:1 and 1:1 ratio of sawdust or rice hulls to poultry manure, and 1:1:1 of all three materials (V/V). Different indicators of compost stability and quality were measured. Thermophilic phase was shorter for piles with rice hulls than for piles with sawdust (60 days vs. 105 days). Time required for stability was similar for both C-rich wastes (about 180 days). Characteristics of final composts were: pH 5.8–7.2, electrical conductivity 2.5–3.3 mS/cm, organic C 20–26%, total N 2.2–2.9%, lignin 19–22%, total Ca 18–24 g/kg, and extractable P 6–8 g/kg, the latter representing 60% of total P. Nitrogen conservation was high in all piles, especially in the one containing both C-rich wastes. Piles with sawdust were characterized by high total and available N, while piles with only rice hulls had higher Si, K and pH. Extractable P was higher in 1:1 piles, and organic C in 2:1 piles. |
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