Modularized dehydration method and dehydration system for polluted bottom mud of rivers, lakes, reservoirs and ponds

Abstract

The invention discloses a modularized dehydration method for polluted bottom mud of rivers, lakes, reservoirs and ponds. The method comprises the steps: sequentially carrying out pretreatment on the polluted bottom mud, carrying out primary slurry concentration, carrying out secondary slurry treatment, carrying out slurry dehydration treatment, buffering and collecting residual water, carrying out physical and chemical treatment on the residual water and carrying out deep treatment on the residual water. The dredged mud is primarily concentrated after being subjected to impurity removal and screening, the solid content of the mud is increased to 15-20% from 1%-5% of that of pretreatment; compared with a traditional sedimentation tank concentration process, the method has the advantages that the mud concentration can be remarkably increased, then secondary dosing treatment is carried out, along with the increase of the mud concentration after primary concentration, and the dosage in the link is reduced by about 20%; ad finally, dehydrating is carrying out to produce solidified soil and residual water, the collected soil is recycled, the residual water is purified by matching with recycling modes such as a baking-free brick process, a greening soil process and the like, and the residual water is discharged to a receiving water body after the residual water meets the discharge requirement. Through multistage treatment in the dehydration method, the dehydration speed of the polluted bottom mud can be integrally accelerated, and the treatment efficiency of the polluted bottom mud is improved.

Description

technical field [0001] The invention belongs to the technical field of river and lake sediment treatment, and in particular relates to a modular dehydration method and a dehydration system for river, lake, reservoir and pond polluted sediment. Background technique [0002] With the acceleration of the construction of ecological civilization in our country, the requirements for water ecological governance are becoming increasingly stringent. Endogenous pollution is an important factor affecting black and odorous water bodies. It is an important measure in the comprehensive improvement of water environment. Environmental dredging is a measure aimed at improving the water environment of rivers and lakes, removing sediment containing pollutants in the water body, blocking pollution sources, and reducing water pollution. Among them, a large amount of removed silt also needs to be properly disposed of, and a large amount of silt is more convenient for environmental protection in ...

AI Technical Summary

Problems solved by technology

The above method has problems such as long construction period, large floor space, poor environmental protection, etc.

The mechanical dehydration method promotes the endogenous pollution control process of rivers, lakes, reservoirs and ponds due to its small footprint, short construction period, and strong environmental protection. However, the mechanical dehydration method has long construction periods, high infrastructure investment, and low availability of sediment. And the high cost of subsequent residual water treatment makes the method of mechanical dehydration difficult to sustainably apply

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