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Abstract(s)
Portugal é o quarto maior produtor de azeite da União Europeia, gerando grande quantidade de bagaço de azeitona (BA), subproduto fitotóxico. A compostagem é uma alternativa para seu tratamento e este trabalho avaliou dois agentes estruturantes (AE): biomassa florestal (BF) e casca de amêndoa (CA), em 7 pilhas, sendo: pilha BA+ (100%BA; C/N 19); pilha BABF+ (50%BA, 50%BF; C/N 26); pilha BACA+ (50%BA, 50%CA; C/N 33); pilha BABFCA+ (50%BA, 25%BF, 25%CA; C/N 33); pilha BACA- (50%BA, 50%CA; C/N 33); pilha BABF- (50%BA, 50%BF; C/N 26); pilha BA- (100%BA; C/N 19), onde (+) indica pilhas revolvidas e (-) estáticas. Monitorizou-se temperatura (T), humidade, densidade, pH, condutividade elétrica, cinzas e fitotoxicidade. As concentrações de C orgânico total (COT), azoto total (Nt), C/O, H/C e C/N foram obtidas por análise química elementar. Como principais resultados, as pilhas (-) apresentaram valores mais baixos de T e cinzas e maior COT e Nt, indicando a decomposição mais lenta do material. BA+ e BA- apresentaram os maiores teores de Nt e tardaram mais na perda da fitotoxicidade. Conclui-se que houve efeito positivo dos AE e revolvimento na decomposição do material, perda de fitotoxicidade e consequentemente, na estabilização e mineralização da matéria orgânica.
Portugal is the fourth largest producer of olive oil in the European Union, resulting in a large generation of olive pomace (BA), a phytotoxic by-product. Composting is an alternative for its treatment and this study evaluated two bulking agents (AE): forest biomass (BF) and almond husk (CA), in 7 piles: pile BA+ (100%BA; C/N 19); BABF+ (50%BA, 50%BF; C/N 26); BACA+ (50%BA, 50%CA; C/N 33); BABFCA+ (50%BA, 25%BF, 25%CA; C/N 33); BACA- (50%BA, 50%CA; C/N 33); BABF- (50%BA, 50%BF; C/N 26); BA- (100%BA; C/N 19), the sign (+) indicates turned piles and (-) static piles. Temperature (T), humidity, density, pH, EC, ash and phytotoxicity were monitored. Concentrations of total organic carbon (COT), total nitrogen (Nt), C/O, H/C and C/N ratios were determined through elemental chemical analyses. As the main results, piles (-) showed lower T and ash content and higher COT and Nt, indicating slower decomposition. BA+ and BA- showed the highest Nt values and the piles lost their phytotoxicity. It was concluded that there was a positive effect of AE and turning, improving the decomposition of the material, losing phytotoxicity and consequently, enhancing the stabilization and mineralization of organic matter
Portugal is the fourth largest producer of olive oil in the European Union, resulting in a large generation of olive pomace (BA), a phytotoxic by-product. Composting is an alternative for its treatment and this study evaluated two bulking agents (AE): forest biomass (BF) and almond husk (CA), in 7 piles: pile BA+ (100%BA; C/N 19); BABF+ (50%BA, 50%BF; C/N 26); BACA+ (50%BA, 50%CA; C/N 33); BABFCA+ (50%BA, 25%BF, 25%CA; C/N 33); BACA- (50%BA, 50%CA; C/N 33); BABF- (50%BA, 50%BF; C/N 26); BA- (100%BA; C/N 19), the sign (+) indicates turned piles and (-) static piles. Temperature (T), humidity, density, pH, EC, ash and phytotoxicity were monitored. Concentrations of total organic carbon (COT), total nitrogen (Nt), C/O, H/C and C/N ratios were determined through elemental chemical analyses. As the main results, piles (-) showed lower T and ash content and higher COT and Nt, indicating slower decomposition. BA+ and BA- showed the highest Nt values and the piles lost their phytotoxicity. It was concluded that there was a positive effect of AE and turning, improving the decomposition of the material, losing phytotoxicity and consequently, enhancing the stabilization and mineralization of organic matter
Description
Keywords
Análise química elementar Biomassa florestal Casca de amêndoa Fitotoxicidade Subproduto agroindustrial
Citation
Segatelli, Ana; Figueiredo, Daniel; Hernandez Hernandez, Zulimar; Figueiredo, Tomás de (2024). Efeito de diferentes agentes estruturantes e revolvimentos na compostagem do bagaço de azeitona = Effect of different bulking agents and turning on composting of olive pomace. Revista de Ciências Agrárias. ISSN 0871-018X. 46 (Esp.), p. 122-128
Publisher
Sociedade de Ciências Agrárias de Portugal