Effect of the irrigation with residual wastewaters on microbial soil activity of the ornamental flowers (<Emphasis Type="Italic">Dahlia pinnata)</Emphasis> cultures monitored by isothermal calorimetry |
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| Authors: | Alexandre G S Prado Sheila M Evangelista Jurandir R SouzaDe Jeane G S Matos Marco A A Souza Denise A Oliveira Claudio Airoldi |
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| Institution: | 1.QuiCSI Team and LQAA, Institute of Chemistry,University of Brasilia,Brasilia D.C.,Brazil;2.Department of Environmental and Civil Engineering, Technology Faculty,University of Brasilia,Brasília D.C.,Brazil;3.Institute of Chemistry,State University of Campinas,Campinas,Brazil |
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| Abstract: | A microcalorimetric method was applied to study microbial soil activity of ornamental flower (Dahlia pinnata) plantations when irrigated with potable water and wastewaters. The samples were irrigated with potable water PW sample (reference)
and treated wastewaters from Municipal Wastewater Treatment Station of Asa Norte in Brasilia City (Brazil). Three different
water treatments were applied to irrigate soil samples, named TW1, TW2, and TW3 samples. The increase of the microbial soil
activity observed in TW1 sample must have occurred because of the high amount of organic waste dissolved in wastewater used
for irrigation. This rise indicates that the present treated wastewater can affect natural life cycle. However, only a low
alteration in microbial soil activity was observed in the TW2 and TW3 samples, which suggests that these wastewater treatments
can be normally used to irrigate soils without bringing environmental consequences, once they offer a great opportunity to
upgrade and protect the environment. |
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