Efeito da concentração inicial de oxigênio no coeficiente de aeração para experimentos de DBO de longo prazo - DOI: 10.4025/actascibiolsci.v25i2.1976

Marcela Bianchessi da Cunha Santino; Irineu Bianchini Junior

doi:10.4025/actascibiolsci.v25i2.1976

Effect of initial concentration of dissolved oxygen in aeration coefficient for long-term BOD experiments- DOI: 10.4025/actascibiolsci.v25i2.1976

Authors

Marcela Bianchessi da Cunha Santino UFSCAR Author
Irineu Bianchini Junior UFSCAR Author

DOI:

https://doi.org/10.4025/actascibiolsci.v25i2.1976

Keywords:

oxigênio dissolvido, coeficiente de aeração, experimentos de DBO de longo prazo

Abstract

Long-term incubations of biochemical oxygen demand (BOD) were performed to determine the aeration coefficient derived from oxygen uptake experiments. The BOD bottles were prepared with distilled water and the incubation occurred in the dark, under controlled temperature (19.4ºC). The bottles were submitted to two different treatments based on the initial dissolved oxygen (DO) concentrations (Treatment 1: 1.43mg L^-1 and Treatment 2: 7.67mg L^-1). The DO concentrations were measured with an OD meter during 52 days. The results were fitted to a first-order kinetics model. The BOD bottles showed an increase in DO concentration for both treatments and the mean aeration coefficient (ka) was 0.065 a day^-1. The fittings pointed to some dispersion in the ka values, and the initial concentration of DO in the BOD bottles does not interfere in the aeration process, being a random process

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Author Biography

Irineu Bianchini Junior, UFSCAR

possui graduação em Licenciatura Em Ciências Biológicas pela Universidade Federal de São Carlos (1980) , graduação em Bacharelado em Ciências Biológicas pela Universidade Federal de São Carlos (1978) , mestrado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1982) , doutorado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1985) e pos-doutorado pela Universidade Federal de São Carlos (1986) . Atualmente é professor titular da Universidade Federal de São Carlos. Tem experiência na área de Ecologia , com ênfase em Ecologia Aplicada. Atuando principalmente nos seguintes temas: macrófitas aquáticas, substâncias húmicas, Ciclo do Carbono, ecossistemas aquáticos, matéria orgânica e Detritos

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Published

2008-04-17

Issue

Vol. 25 No. 2 (2003)

Section

Biology Sciences

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How to Cite

Effect of initial concentration of dissolved oxygen in aeration coefficient for long-term BOD experiments- DOI: 10.4025/actascibiolsci.v25i2.1976. (2008). Acta Scientiarum. Biological Sciences, 25(2), 253-256. https://doi.org/10.4025/actascibiolsci.v25i2.1976