Method for ecologically restoring pits

Abstract

The invention relates to a method for ecologically restoring pits. The method is used for vegetation restoration by adopting a combination method of foreign soil greening and palisades spray seeding on slope toe platforms, improves the crumble structure and the smell of sludge, reduces the quantity of pathogenic bacteria and parasitic ova, and improves the available contents of nutrient indexes comprising N, P, K and the like by utilizing the organic fertilizer features of urban sludge per se, medicine dregs, agricultural wastes and the like through fertilizer composting so that the fertilizers are more beneficial to plant adsorption. The method ensures that a great amount of urban sludge is effectively handled, can be also used for improving the pits having no soil substrates for vegetation growth into soil suitable for reclamation, and is a good method which has the advantages of low improving cost, waste reclamation, simple and easy enforcement and effectiveness and can create huge environmental benefits, economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for ecological restoration of dangkou utilization sludge, medicinal residues or / and straws and other wastes, and belongs to the field of environmental protection. Background technique [0002] Dangkou refers to the unusable land destroyed by mining activities without certain treatment. In recent years, the area of ​​land abandoned due to mining has increased year by year. The large area of ​​the mouth not only reduces the available land resources, but also has many negative impacts on the regional ecological environment. From a technical point of view, the biggest difficulty in plant restoration in abandoned mines is that the abandoned soil is barren and the content of organic matter is very low. It is a soil matrix that does not have vegetation growth and becomes a new barren hill. [0003] On the other hand, with the rapid development of urban construction, domestic sewage treatment plants in various places are bei...

AI Technical Summary

Problems solved by technology

The moisture content is 70-80%, and it is very difficult to develop and utilize

As a result, the sludge discharged from sewage treatment plants accumulates in large quantities and is difficult to dispose of. It has become an extremely fragile weak link and has evolved into a "threshold" that hinders the healthy development of the sewage treatment industry.

[0004] On the other hand, a large amount of agricultural waste such as crop stalks, a large amount of livestock and poultry manure produced by large-scale livestock and poultry breeding in agricultural production, and a large amount of rice husk and sawdust produced by production and processing industries are still very limited. The utilization rate is still very low, and there are still phenomena such as burning straw and randomly dischargi