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This paper was carried out in the Irrigation Technical Center of Universidade Estadual de Maringá. It aimed to evaluate filter capacity to waste water of the compound soil columns with 83% of sand, 1% of silt and 16% of clay. Six columns were utilized with 0.20 m of diameter (superficial area of 0.031 m2) by 0.50 m of high (total volume of 0.015 m3). The presence of starch was identified in the percolated grass effluent of the columns and, by the acid starch hydrolysis method the present soluble sugar content was quantified in the same percolated effluent, after columns saturation. It was possible to conclude that the starch from waste water was totality retained into the soil columns, percolating only hydrolyzed sugar and water. Results also showed that the concentration of cyanide and the DBO and DQO rates from percolated waste water were over the maximum rate permitted by Environmental Law to be used in the soil; 87.07% of all present solids in the waste water of manioc starch are organic matter and that justifies its high DBO (and/or DQO).Este trabalho foi realizado no Centro Técnico de irrigação da Universidade Estadual de Maringá, com o objetivo de avaliar a capacidade filtrante, para água residuária, das colunas de solo composto de 83% de areia, 1% de silte e 16% de argila. Foram utilizadas seis colunas com secção transversal de 0,20 m de diâmetro (área superficial de 0,031 m2) por 0,50 m de altura (volume total de 0,015 m3). Procurou-se quantificar, pelo método da hidrólise ácida do amido os teores de açúcares solúveis no percolado. Concluiu-se que o amido contido na água residuária de fecularia de mandioca, quando aplicado na coluna de solo, ficou totalmente retido, percolando apenas água e açúcares já hidrolisados. A concentração de cianeto e as taxas de DBO e DQO da água residuária percolada, mesmo sofrendo diminuição quando comparadas com o efluente bruto aplicado, encontraram-se acima dos valores máximo permitidos pela legislação ambiental, para serem aplicados ao solo e 87,07% de todos os sólidos presentes na água residuária de fecularia de mandioca são matéria orgânica, o que justifica a sua elevada DBO (e/ou DQO)

Desdobramento do amido em glicose para identificar água residuária de indústria de mandioca no perfil do solo