Soil conditioner prepared from sludge and preparation method thereof

Abstract

The invention belongs to the field of solid waste reclamation comprehensive utilization and particularly relates to a soil conditioner prepared from sludge and a preparation method thereof. The soil conditioner is prepared from river and lake bottom mud, conditioner, medium sand, agricultural and forestry residues, biological manure and plant ash, wherein the conditioner is 5% to 8% of the mass of the river and lake bottom mud, the medium sand is 5% to 10% of the mass of the river and lake bottom mud, the agricultural and forestry residues are 5% to 10% of the mass of the river and lake bottom mud, the biological manure is 1% to 5% of the mass of the river and lake bottom mud, and the plant ash is 1% to 3% of the mass of the river and lake bottom mud. The soil conditioner prepared from sludge disclosed by the invention achieves resource utilization of sludge, also fully utilizes sludge, tailings or river and lake sand, tailing sand, pipe network sand and agricultural and forestry residues at the same, achieves the purpose of treating waste through waste, avoids solid waste landfill, land occupancy and secondary pollution, reduces engineering cost of land reclamation, landscaping, forest land plant and the like and is beneficial to ecological environment; in addition, the river and lake sand, the tailing sand, the pipe network sand and the agricultural and forestry residues are separated and sorted from pipe network sludge.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste resources, and in particular relates to a soil conditioner prepared from sludge and a preparation method thereof. Background technique [0002] River and lake bottom mud is a flocculent and honeycomb structure formed by the deposition of fine particles such as clay minerals under the action of intergranular electrostatic force and molecular gravity in slow flowing water environments such as lake areas. It has the basic physical and chemical properties of terrestrial soil , rich in various nutrients needed for plant growth, can promote the growth of trees and lawns, so it can be used for land improvement, landscaping and woodland, but it has high salt content, low clay content, and no soil structure, so It cannot be directly used as planting soil for cultivation, and it needs to be used after certain treatment. In developed countries, silt is used as a valuable resource for ...

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Problems solved by technology

[0004] It is not uncommon to use silt as a planting substrate to use patented technologies for land utilization, but most of them are treated with compost or dried silt, which greatly increases the processing cost and is difficult to apply in engineering

For example, the invention patent of China Construction Third Bureau Group Co., Ltd. "A planting soil prepared by solidification of silt, its preparation method and its application" (Patent No.: 201510667416.3) discloses a kind of sludge that is used as raw material to add a curing agent for curing and then crushed. The method of adding organic fertilizer to prepare planting soil, this method will lead to high alkalinity of planting soil, soil compaction, and affect the normal growth of plants

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