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Constructed rapid infiltration system ( CRI ) is simulated through two groups of 3 soil columns with the height of 30 cm, 55 cm and 80 cm respectively. After pretreatment, the mixed wastewater of regenerated-paper making is put into the six soil columns. There are 16 kinds of hydraulic loading cycles made of 4 kinds of flooding-drying ratios (1:6, 1:4, 1:2, 1:1) and 4 kinds of flooding time (4 h,...
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