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Reuse of treated domestic sewage effluent as an alternative water source for the production of sugarcane/Efluente de esgoto domestico tratado e reutilizado como fonte hidrica alternativa para a producao de cana-de-acucar

With the excessive consumption of water in agricultural production, and the expansion of the cultivation of sugarcane due to growing demand for ethanol, in this context, a rational use of water for irrigation and use of wastewater in agricultural production has been raised. Therefore, the objective...

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Published in:Revista brasileira de engenharia agrĂ­cola e ambiental 2013-07, Vol.17 (7), p.727
Main Authors: de Freitas, Cley A.S, da Silva, Alexandre R.A, Bezerra, Francisco M.L, Mota, Francisco S.B, Goncalves, Luciana R.B, Barros, Emanuel M
Format: Article
Language:Portuguese
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Summary:With the excessive consumption of water in agricultural production, and the expansion of the cultivation of sugarcane due to growing demand for ethanol, in this context, a rational use of water for irrigation and use of wastewater in agricultural production has been raised. Therefore, the objective of this study was to evaluate the effects of reuse of treated domestic sewage effluent for irrigation of sugarcane. The study was conducted at the Research Center on Treatment and Reuse of Wastewater, in Aquiraz, CE. The experimental design was randomized blocks in split plots with four replications. In the plots were evaluated the effects of two types of water (well water and treated domestic sewage); in the subplots five irrigation water depths were allocated, based on percentage of evaporation in a Class "A" tank. It can be concluded that wastewater provided the highest potential yield of stem (272.1 Mg [ha.sup.-1]) and higher plant density (126,000 plants [ha.sup.-1]). The increase in irrigation water depths provided increase in potential yield and plant density, regardless of the type of water. Key words: water reuse, drip irrigation, Saccharum officinarum L. Com base no consumo hidrico excessivo na producao agricola e da expansao do cultivo da cana-de-acucar impulsionada pela crescente demanda de etanol, tem-se questionado em relacao a um uso mais racional da agua de irrigacao e ao reuso de agua na producao agricola. Desta forma objetivou-se, com o presente trabalho, avaliar os efeitos do reuso de efluente de esgoto domestico tratado na irrigacao da cana-deacucar. O estudo foi conduzido no Centro de Pesquisa sobre Tratamento e Reuso de Aguas Residuarias, em Aquiraz, CE. O delineamento experimental adotado foi o de blocos ao acaso, no esquema de parcelas subdivididas, com quatro repeticoes. Nas parcelas avaliaram-se os efeitos de dois tipos de agua (agua potavel e esgoto domestico tratado); e nas subparcelas se alocaram cinco laminas de irrigacao baseadas em percentuais da evaporacao medida em um tanque do tipo classe A (ECA). Concluiu-se que a agua residuaria proporcionou o maior potencial produtivo de colmos (272,1 Mg [ha.sup.-1]) e a maior densidade de plantas (126.000 plantas [ha.sup.-1]). O aumento das laminas de irrigacao proporcionou incrementos no potencial produtivo e na densidade de plantas, independente do tipo de agua. Palavras-chave: reuso de agua, gotejamento, Saccharum officinarum L.
ISSN:1415-4366