Utilização de mantas não tecidas como elemento filtrante em sistemas de irrigação localizada

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The objective of this work was to evaluate the efficiency of non woven synthetic fabrics on algae removal from water used in trickle and drip irrigation systems. For the evaluation of the non woven synthetic fabrics, the assays have been divided in three stages: in the first stage eight types of synthetic fabrics were evaluated in relation to the head loss evolution, as a function of the outflow, in laboratory using treated water without impurities that could be restrained and cause increase in the head loss. On the second stage, three selected non woven synthetic fabrics have been placed together with screen and disks filters of 120MESH for comparative evaluations related to suspended solids removal from the irrigation water and the evolution in the head loss. For the third stage it was selected one of the non woven synthetic fabrics, putting it together with the screen and disks filters for evaluating it in relation to algae removal from the water and dripper clogging with outflow of 4L/h and 8L/h, installed after the filters. The evaluation of the filter efficiency was made collecting water samples of the inffluent and effluent of the filters, determining the suspended solid concentration (mg/L) in the second stage and counting algaes by the method of Sedgwick-Rafter in the third stage. The percentages of suspended solids and algae have been analyzed applying the test F for analysis of the variance. The data, in percentage, has been transformed according to arc sine of the root of x / 100. (...continue)

ASSUNTO(S)

agua - qualidade. filtros e filtração irrigação

ACESSO AO ARTIGO

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