Dehydration model test of high moisture content mud

A new flocculation-absorption combined treatment method is proposed for a large amount of dredged mud and waste mud in actual projects, effectively solving the problem of slow treatment and the high cost of traditional mud treatment methods. The suitability of the optimal flocculant type for the original state dredged sediment was verified through flocculation tests. The dewatering effect of different water absorption methods on the flocculated mud through an indoor modeling test was analyzed. The results show that: for the primary dredged mud, cationic polyacrylamide (CPAM), anionic polyacrylamide (APAM), and nonionic polyacrylamide (NPAM) can achieve a high flocculation effect, and the best flocculant type can be 0.4% of cationic polyacrylamide (CPAM); vertical water absorption is the most effective way to reduce the water content of the mud, which can reduce the water content to 52%, slightly lower than the liquid limit of 53% of the mud; vertical water absorption and vertical + surface water absorption can be used to obtain a more uniform drying effect at different depths; the water content of the mud was reduced to 1.8～1.9 times of the optimal water content to mark the completion of the absorption process, which provides a basis for the judgment of the completion of the absorption process in the actual project.