Enhanced dewater efficiency for river sediment by top-to-bottom water transmitting channels with different materials

摘要: Artificial top-to-bottom water transmitting channels made of threads wool blend (WT), cotton (CT), flax (FT), and polyethylene (PET) were used to enhance the dewater efficiency for river sediment. In addition, disordered composed 3-mm-long WT segments mixed randomly into sediment also employed. The most effective dewatering found be with absorption capacity 8.7 ± 0.5 g · g-1 volume compressibility 2.94 ± 0.11. On application 0.1 MPa pressure mud surface, initial content 60.0 ± 0.2 wt%, obtained channel material weight 0.411 wt% dry solids a cake height ratio 0.95 upon 90-min was 39.6 ± 0.7 wt% enhanced dewaterability, compared that without 74.9 ± 0.9 kg · kg-1 · h-1. Using same parameters, dewaterability only 69.1 ± 0.3, 55.2 ± 2.8, 9.1 ± 0.9 kg · kg-1 · h-1 CT, FT, PET channels, respectively. Moreover, final dewatered in presence at dosage 1.10 wt% 49.8 ± 0.7 wt% 5.9 ± 0.5 kg · kg-1 · h-1 only. These demonstrate is main factor affecting being important.