In-situ landfill and island creation method for recycling polluted bed-mud dehydrated by geotextile tubes

Abstract

The invention provides a technical method for treating polluted bed-mud of rivers, lakes and reservoirs, and provides a safe, energy-saving, environment-friendly and low-cost treatment method to overcome defects of methods for treating polluted bed-mud of lakes and reservoirs. The method comprises the following steps of: creating an island for landfill, dredging in an environment-friendly way, dehydrating and reducing volume by using geotextile tubes, and performing closure cover, so that a polluted lake and reservoir area is transformed into an environment-friendly landscape island. The method has the advantages that: secondary pollution is avoided in the treatment process, a process is simple, the water content of the treated sludge is low, and the treated sludge is conveniently subjected to landfill in situ; and three aims of dredging the sludge, performing treatment and landfill in situ, and dehydrating and reducing volume of the sludge are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of treating rivers, lakes, and reservoir polluted bottom mud, and particularly relates to a treatment method for using the treated mud to build islands and fill them in situ. Background technique [0002] In recent years, 70 million tons of sludge have been produced in river and lake dredging projects in my country every year. How to deal with these sludge in an energy-saving and environmentally-friendly way is an urgent problem to be solved. Such sediment treatment projects usually have harsh site conditions, usually requiring short construction periods and high processing costs. At present, environmental protection dredging is the preferred method for internal source pollution control of lakes and reservoirs. However, the conventional method of this method is to transport the dredged sludge to the sludge dump for disposal, which not only occupies a large amount of valuable land resources, but also is prone...

AI Technical Summary

Problems solved by technology

The in-situ island landfill saves land to the greatest extent, solves the problem of large-scale land occupation for the disposal of polluted sediment, and saves the cost of sludge transportation to the greatest extent; prevents the sludge from dredging to the greatest extent through environmental protection dredging Secondary pollution caused by disturbance; conveying through closed pipelines to ensure that the dredged sludge will not leak before entering the bag and causing secondary pollution; replacing mechanical dewatering with geotechnical tube bag dehydration saves equipment investment and operating costs; through sludge flocculation Dosing of additives to strengthen the dehydration effect of geotube bags

Therefore, this method can effectively solve the problems of high cost, high energy consumption, and large land occupation for lake sediment treatment.

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