A method for ecological drainage and comprehensive utilization of dredged sludge storage yard

Abstract

The invention relates to an ecological drainage and comprehensive utilization method of dredging mud storage yards. An ecological hard shell layer is made on the surface of the sludge dump, and the upper and lower mud of the hard shell layer has both drainage capacity and certain Strength, and at the same time, it can provide oxygen and nutrient drainage for the growth of loach or eel. Tensile straw nutrient bag can realize the purpose of feeding loach or eel in deep silt in the yard, accelerating deep silt drainage, and improving the bearing capacity of the surface hard shell; at the same time , using the organic matter in the excrement of loach or rice field eel during the growth process, to accelerate the agglomeration of sludge particles around the drainage body, and to use the characteristics of loach or rice field eel drilling in the mud during the life process to increase the drainage channels in the mud around the drainage body, Further accelerate the silt drainage.

Description

technical field [0001] The invention relates to a method for ecological drainage and comprehensive utilization of a dredged silt yard, belonging to the field of dredging mud treatment. Background technique [0002] Every year in my country, a large number of river channels are dredged, resulting in a large amount of dredged silt. At present, mud dumps are generally set up on the waste land on both sides of the river, and the dredged fluid dredging sludge is blown into the mud dump for disposal. Due to the extremely high moisture content of the dredged mud, it cannot be directly used as a project construction. In addition, many storage yards are expropriated agricultural land. Therefore, the common practice is to carry out ecological reinforcement treatment on the surface silt of the silt yard to form a hard shell layer. Consolidation (5-10 years). Obviously, if the drainage and consolidation of the lower silt is accelerated without affecting the planting function of the u...

AI Technical Summary

Problems solved by technology

Although report utilizes traditional ditching technology in some existing technologies, the feeding depth of loach reaches 1.5 meters, but ditching depth is limited, and depth is darker, and the soil body on both sides of ditch collapses easily, causes ditch and can not form; In good soft clay, the depth of the trench is difficult to exceed 2 meters, and for the silt foundation, the trench generally does not exceed 0.5m. If it is newly dredged silt, it is in a fluid state, and it is basically impossible to form a trench

In addition, the excavation of the trench will also occupy the surface area. If the surface is planted, the planting area will be greatly reduced.

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