SciELO - Scientific Electronic Library Online

 
vol.30 número2Limites na utilização de um modelo de balanço hídrico decendial em função da capacidade de água disponível no soloAvaliação da deposição da calda de pulverização em função da vazão e do tipo de bico hidráulico na cultura da soja índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Acta Scientiarum. Agronomy

versão On-line ISSN 1807-8621

Resumo

SILVA, Nara Cristina Lima et al. Variation in the static pressure of insufflated air under different specific flow rates in columns of organic material at distinct biochemical stages. Acta Sci., Agron. [online]. 2008, vol.30, n.2, pp.165-170. ISSN 1807-8621.  http://dx.doi.org/10.4025/actasciagron.v30i2.1790.

Little is known about the power requirements of the exhaust fan throughout the composting period of a forced aeration systems. This study was conducted in order to adjust the variation curves for static air pressure, when forced into piles of organic material at different biochemical degradation stages. To that end, a composting pile with both sugarcane bagasse (BC) and poultry litter (CF) was stacked, by preparing the mixture in such a way as to obtain an initial C/N ratio of 30/1. The material was revolved every three days during the first month, followed by revolutions at regular 5-day intervals for two more months. Load loss was measured at 1m column height for the BC under the same conditions used in the mixture, as well as in the BC + CF mixture under the conditions at 30, 60 and 90 days of composting. The higher the specific air flow and the biochemical degradation time of the material under composting, the higher the decrease in the static pressure of the air insufflated in it. The Shedd model was well adjusted to the experimental data in the air specific flow range under investigation, and can be used to predict the static pressure gradients in organic compost.

Palavras-chave : composting; aerated static piles; aeration.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons