Effects of sawdust-CPAM on textile dyeing sludge dewaterability and filter cake properties

The high compressibility of flocculated sludge results in the sludge cake particles being deformed during the compressed filtrated stage. The lower layer forms a continuous and compacted cake with no channels or voids during the compressed filtration step, making it hard for the upper moisture to pass through. In the case of the sawdust-conditioned flocculated sludge, a skeleton construction with many pores and channels was built among the sawdust. The flocculated sludge, being a highly compressible material, is captured within the skeleton construction and coats the sawdust particles. As a result, the sawdust-conditioned flocculated sludge can form permeable and more rigid lattice structures that prevent the formation of an impermeable layer of sludge.