Penetration of ozone into columns of stored grains and effects on chemical composition and processing performance

Méndez, Fernando Torres; Maier, Dirk E.; Mason, Linda J.; Woloshuk, Charles P.

doi:10.1016/s0022-474x(02)00015-2

Cited by 190 publications

(131 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Os resultados observados referentes à concentração residual do ozônio nos grãos de amendoim durante o processo de saturação, nas diferentes combinações de concentração inicial e altura da coluna dos grãos, seguiram tendência semelhante à descrita por Strait (1998), Kells et al (2001) e Mendez et al (2003). De acordo com esses autores, o movimento do ozônio em meio poroso contendo grãos apresenta duas fases.…”

Section: Resultsunclassified

Saturação do ozônio em coluna contendo grãos de amendoim e efeito na qualidade

Roberto

Alencar

Ferreira

et al. 2016

Braz. J. Food Technol.

View full text Add to dashboard Cite

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. Saturação do ozônio em coluna contendo grãos de amendoim e efeito na qualidade Ozone saturation in a column containing peanut kernels and the effect on quality ResumoObjetivou-se com este trabalho avaliar o processo de saturação do ozônio em coluna contendo amendoim e o efeito na qualidade de produto. Utilizaram-se grãos com teor de umidade em torno de 6,8% (b.u.), acondicionados em recipientes cilíndricos de PVC, com 1,10 m de altura e 15 cm de diâmetro. O gás, nas concentrações de 1,59 e 2,78 mg L -1 , foi injetado na base da coluna e os valores adotados de altura da coluna de grãos foram de 0,25, 0,50 e 0,75 m. Determinaram-se os tempos e as concentrações de saturação e avaliou-se a qualidade dos grãos ozonizados. Para os grãos ozonizados na concentração de 1,59 mg L -1 , obteve-se tempo de saturação na faixa entre 222 e 449 min. No que tange à relação C Sat /C 0 , obtiveram-se valores entre 0,32 e 0,48. Com relação aos grãos submetidos à ozonização na concentração de 2,78 mg L -1 , obteve-se tempo de saturação na faixa entre 78 e 251 min. No que se refere à relação C Sat /C 0 , para a concentração inicial de 2,78 mg L -1 , os valores permaneceram entre 0,46 e 0,81. É possível concluir, a partir dos resultados obtidos, que, à medida que se aumenta a altura da coluna de grãos de amendoim, há aumento do tempo de saturação e decréscimo da concentração de saturação. Não houve alteração na qualidade do produto durante o processo de ozonização. Palavras-chave:Ozonização; Saturação; Alteração qualitativa. SummaryThe objective of this study was to evaluate the ozone saturation process in a column containing peanuts and the effect on product quality. Peanuts with a moisture content of about 6.8% (w.b.) were used, packed in cylindrical PVC containers with 1.10 m in height and 15 cm in diameter. Ozone was injected into the base of the cylindrical column and the corresponding values adopted for the heights of the grain columns were 0.25, 0.50 and 0.75 m. The peanuts were ozonized at concentrations of 1.59 and 2.78 mg L -1 , a temperature of 25 °C and a gas flow rate of 5.0 L min -1 . The ozone saturation times and concentrations were determined and also the quality of the ozonized peanuts. For peanut kernels ozonated at a concentration of 1.59 mg L -1 , saturation times ranging between 222 and 449 min were obtained. Regarding the C Sat /C 0 ratio, values between 0.32 and 0.48 were obtained. For peanut kernels ozonated at a concentration of 2.78 mg L -1 , saturation times between 78 and 251 min were obtained, and the C Sat /C 0 ratio for an initial concentration of 2.78 mg L -1 was between 0.46 and 0.81. It was concluded from the results that an increase in height of the peanut kernel column resulted in an increased saturation time and decreased saturation concentration. There was no change i...

show abstract

Section: Resultsunclassified

Saturação do ozônio em coluna contendo grãos de amendoim e efeito na qualidade

Roberto

Alencar

Ferreira

et al. 2016

Braz. J. Food Technol.

View full text Add to dashboard Cite

show abstract

“…Fixed bed ozonation trials were performed at PHERC on the same grain bins with conventional yellow maize maintained from 2005 to 2008 using a minimum air velocity of 0.03 m/s based on Mendez et al (2003). This velocity assures proper ozone movement through a grain mass.…”

Section: Ozonation Trials With Conventional Yellow Maize At Phercmentioning

confidence: 99%

“…No substantial difference in insect mortality between MW and RFB adults exposed to the same CTPs was determined in this first set of experiments. The high insect mortality results proved that ozonation could be successfully scaled up from the lab scale (Kells et al, 2001;Mendez et al, 2003) to the pilot scale and utilized as an effective tool for pest control in stored grain.…”

Section: First Ozonation Trial At Pherc In 2005mentioning

confidence: 99%

“…(2) Ozone application has been approved as generally recognized as safe for sanitation and sterilization purposes (FDA, 2001) and it has been regulated as a non-chemical and environmentally friendly alternative (EPA, 1999) in the food processing industry. (3) Ozone decomposes rapidly into oxygen due to its instability characteristics, therefore leaving no residue (Khadre et al, 2001;Mendez et al, 2003). Its half-life time can be up to 24 h in still air, but much less in flowing air depending on its air temperature and relative humidity (McClurkin, 2009).…”

mentioning

confidence: 99%

“…This stage is called Phase 2. It has been reported that a minimum air velocity of 0.03 m/s must move through the grain mass to achieve an optimal ozone concentration and treatment effect (Kells et al, 2001;Mendez et al, 2003) during Phase 1 and a minimum air velocity of 0.02 m/s during Phase 2 (Kells et al, 2001). The primary objective of this research was to undertake scale-up demonstration trials for the fixed bed ozonation treatment system and to confirm efficacy to control insect pests in stored bulk grain without affecting end-use quality.…”

mentioning

confidence: 99%

See 2 more Smart Citations