Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/4135 |
Resumo: | The drying of seeds of the pioneer species Cecropia glaziovii Snethlage is motivated due to its restoration characteristics of heterogeneous degraded forests. In this work the main goal is the physical and drying characterization of Cecropia glaziovii seeds in batch fluidized bed, as well as the physiological quality. The dimensions and shapes of seeds were obtained by image analysis, assessing the reproducibility of these measures for in natura samples and those classified by sieving. The drying characterization in fluidized bed drying was performed, with initial fixed bed heights of 3 and 5 cm, with air temperature (40 ± 2)°C and drying air velocity (1.0 ± 0.3) m/s. It was noted that the dimensions and shapes of seeds classified by sieving have higher reproducibility than the in natura ones. Therefore, the seeds retained on the 20 mesh sieve were used for the drying characterization. By using the moisture ratio as a function of time, it could be seen that the mixture in the fluidized bed was homogeneous, as the variation between the bed heights of 3 and 5 cm was negligible. Based on the dimensionless drying rate as a function of moisture ratio, only the decreasing rate period was observed. It was also found that the seeds constitute a porous and hygroscopic particulate system in the conditions used in this study. Therefore, samples with statistical reproduction of sizes and shapes were obtained by physical characterization, and for these seeds, drying characterization was carried out, obtaining the classification of the particulate system as porous and hygroscopic medium without reporting constant drying rate period. The germination index of Cecropia glaziovii seeds was 77%, this value is consistent with government reforestation programs. |
id |
SCAR_513659f6e4ab27a60eb9a7e2c870baf7 |
---|---|
oai_identifier_str |
oai:repositorio.ufscar.br:ufscar/4135 |
network_acronym_str |
SCAR |
network_name_str |
Repositório Institucional da UFSCAR |
repository_id_str |
4322 |
spelling |
Felizardo, Marcos PauloSartori, Dermeval José Mazzinihttp://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4787341D7http://lattes.cnpq.br/26198215302786481f0bd566-414c-4f3d-80d6-35f9828c8d5a2016-06-02T19:56:54Z2014-07-142016-06-02T19:56:54Z2014-02-28FELIZARDO, Marcos Paulo. Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage). 2014. 88 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2014.https://repositorio.ufscar.br/handle/ufscar/4135The drying of seeds of the pioneer species Cecropia glaziovii Snethlage is motivated due to its restoration characteristics of heterogeneous degraded forests. In this work the main goal is the physical and drying characterization of Cecropia glaziovii seeds in batch fluidized bed, as well as the physiological quality. The dimensions and shapes of seeds were obtained by image analysis, assessing the reproducibility of these measures for in natura samples and those classified by sieving. The drying characterization in fluidized bed drying was performed, with initial fixed bed heights of 3 and 5 cm, with air temperature (40 ± 2)°C and drying air velocity (1.0 ± 0.3) m/s. It was noted that the dimensions and shapes of seeds classified by sieving have higher reproducibility than the in natura ones. Therefore, the seeds retained on the 20 mesh sieve were used for the drying characterization. By using the moisture ratio as a function of time, it could be seen that the mixture in the fluidized bed was homogeneous, as the variation between the bed heights of 3 and 5 cm was negligible. Based on the dimensionless drying rate as a function of moisture ratio, only the decreasing rate period was observed. It was also found that the seeds constitute a porous and hygroscopic particulate system in the conditions used in this study. Therefore, samples with statistical reproduction of sizes and shapes were obtained by physical characterization, and for these seeds, drying characterization was carried out, obtaining the classification of the particulate system as porous and hygroscopic medium without reporting constant drying rate period. The germination index of Cecropia glaziovii seeds was 77%, this value is consistent with government reforestation programs.A secagem de sementes da espécie pioneira Cecropia glaziovii Snethlage é motivada devido às suas características de recuperação de florestas heterogêneas degradadas. Neste trabalho o principal objetivo é a caracterização física e de secagem de sementes de Cecropia glaziovii em leito fluidizado em batelada, bem como a qualidade fisiológica. As dimensões e formas das sementes foram obtidas através de análise de imagens, avaliando a reprodutibilidade destas medidas para amostras in natura e classificadas por peneiramento. Foi realizada a caracterização de secagem em leito fluidizado com alturas de leitos fixos iniciais de 3 e 5 cm, com temperatura do ar de (40±2)°C e velocidade do ar de secagem de (1,0±0,3) m/s. Foi observado que as dimensões e formas das sementes classificadas por peneiramento apresentam maior reprodutibilidade que as in natura. Portanto, foram utilizadas as sementes retidas na peneira de 20 mesh para a caracterização de secagem. Através do adimensional de umidade em função do tempo pode-se constatar que a mistura no leito fluidizado foi homogênea, pois a variação foi desprezível entre as alturas de leito de 3 e 5 cm. Com base no adimensional de taxa de secagem em função do adimensional de umidade observou-se apenas o período de taxa de secagem decrescente, também se constatou que as sementes de embaúba constituem um sistema de partículas poroso e higroscópico nas condições utilizadas neste trabalho. Portanto, através da caracterização física obtiveram-se amostras com reprodução estatística das medidas de dimensões e formas, e para estas sementes foi realizada a caracterização de secagem, obtendo-se a classificação deste sistema de partícula como meio poroso e higroscópico e sem apresentação de período de taxa constante. O índice de germinação das sementes de embaúba foi de 77%, valores adequados para programas governamentais de reflorestamento.Universidade Federal de Sao Carlosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Engenharia Química - PPGEQUFSCarBRSecagemPropriedades físicasEsfericidadeFluidizaçãoCecropiaGerminaçãoPhysical propertiesSphericityFluidizationGerminationENGENHARIAS::ENGENHARIA QUIMICACaracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-16fa44ad7-30e8-4754-9c21-059bf7644520info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL5890.pdfapplication/pdf8136490https://repositorio.ufscar.br/bitstream/ufscar/4135/1/5890.pdff4dc359468928494ebdd96e3f1c64ebeMD51TEXT5890.pdf.txt5890.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/4135/2/5890.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAIL5890.pdf.jpg5890.pdf.jpgIM Thumbnailimage/jpeg6500https://repositorio.ufscar.br/bitstream/ufscar/4135/3/5890.pdf.jpgd3fff03a3bff1272edd04f2b86e6fbf3MD53ufscar/41352023-09-18 18:31:33.71oai:repositorio.ufscar.br:ufscar/4135Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:33Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
title |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
spellingShingle |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) Felizardo, Marcos Paulo Secagem Propriedades físicas Esfericidade Fluidização Cecropia Germinação Physical properties Sphericity Fluidization Germination ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
title_full |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
title_fullStr |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
title_full_unstemmed |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
title_sort |
Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage) |
author |
Felizardo, Marcos Paulo |
author_facet |
Felizardo, Marcos Paulo |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/2619821530278648 |
dc.contributor.author.fl_str_mv |
Felizardo, Marcos Paulo |
dc.contributor.advisor1.fl_str_mv |
Sartori, Dermeval José Mazzini |
dc.contributor.advisor1Lattes.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4787341D7 |
dc.contributor.authorID.fl_str_mv |
1f0bd566-414c-4f3d-80d6-35f9828c8d5a |
contributor_str_mv |
Sartori, Dermeval José Mazzini |
dc.subject.por.fl_str_mv |
Secagem Propriedades físicas Esfericidade Fluidização Cecropia Germinação |
topic |
Secagem Propriedades físicas Esfericidade Fluidização Cecropia Germinação Physical properties Sphericity Fluidization Germination ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Physical properties Sphericity Fluidization Germination |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA |
description |
The drying of seeds of the pioneer species Cecropia glaziovii Snethlage is motivated due to its restoration characteristics of heterogeneous degraded forests. In this work the main goal is the physical and drying characterization of Cecropia glaziovii seeds in batch fluidized bed, as well as the physiological quality. The dimensions and shapes of seeds were obtained by image analysis, assessing the reproducibility of these measures for in natura samples and those classified by sieving. The drying characterization in fluidized bed drying was performed, with initial fixed bed heights of 3 and 5 cm, with air temperature (40 ± 2)°C and drying air velocity (1.0 ± 0.3) m/s. It was noted that the dimensions and shapes of seeds classified by sieving have higher reproducibility than the in natura ones. Therefore, the seeds retained on the 20 mesh sieve were used for the drying characterization. By using the moisture ratio as a function of time, it could be seen that the mixture in the fluidized bed was homogeneous, as the variation between the bed heights of 3 and 5 cm was negligible. Based on the dimensionless drying rate as a function of moisture ratio, only the decreasing rate period was observed. It was also found that the seeds constitute a porous and hygroscopic particulate system in the conditions used in this study. Therefore, samples with statistical reproduction of sizes and shapes were obtained by physical characterization, and for these seeds, drying characterization was carried out, obtaining the classification of the particulate system as porous and hygroscopic medium without reporting constant drying rate period. The germination index of Cecropia glaziovii seeds was 77%, this value is consistent with government reforestation programs. |
publishDate |
2014 |
dc.date.available.fl_str_mv |
2014-07-14 2016-06-02T19:56:54Z |
dc.date.issued.fl_str_mv |
2014-02-28 |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:56:54Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
FELIZARDO, Marcos Paulo. Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage). 2014. 88 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2014. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/4135 |
identifier_str_mv |
FELIZARDO, Marcos Paulo. Caracterização física e de secagem de sementes de embaúba (Cecropia glaziovii Snethlage). 2014. 88 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2014. |
url |
https://repositorio.ufscar.br/handle/ufscar/4135 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
-1 -1 |
dc.relation.authority.fl_str_mv |
6fa44ad7-30e8-4754-9c21-059bf7644520 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Química - PPGEQ |
dc.publisher.initials.fl_str_mv |
UFSCar |
dc.publisher.country.fl_str_mv |
BR |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
UFSCAR |
institution |
UFSCAR |
reponame_str |
Repositório Institucional da UFSCAR |
collection |
Repositório Institucional da UFSCAR |
bitstream.url.fl_str_mv |
https://repositorio.ufscar.br/bitstream/ufscar/4135/1/5890.pdf https://repositorio.ufscar.br/bitstream/ufscar/4135/2/5890.pdf.txt https://repositorio.ufscar.br/bitstream/ufscar/4135/3/5890.pdf.jpg |
bitstream.checksum.fl_str_mv |
f4dc359468928494ebdd96e3f1c64ebe d41d8cd98f00b204e9800998ecf8427e d3fff03a3bff1272edd04f2b86e6fbf3 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
|
_version_ |
1802136272972546048 |