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Ecological restoration method using urban sludge

A technology for ecological restoration and urban sludge, applied in the fields of ecological restoration, environmental protection and ecological restoration, can solve problems such as pollution, increase sludge disposal costs, increase safety, etc., and achieve high nutrient content, favorable slope stability and soil and water conservation. , the effect of improving air permeability

Inactive Publication Date: 2017-08-22
BEIJING UNIV OF AGRI
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Problems solved by technology

Therefore, the land use of sludge needs to solve the problem of heavy metal pollution. At present, most of the sludge is composted to reduce the content of harmful substances, but while increasing the safety, it also increases the cost of sludge disposal.

Method used

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  • Ecological restoration method using urban sludge
  • Ecological restoration method using urban sludge
  • Ecological restoration method using urban sludge

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Embodiment Construction

[0037] The present invention will be described more fully below using examples. This invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

[0038] The sludge is taken from the Xiaotangshan Sewage Treatment Plant of the Water Affairs Bureau of Changping District, Beijing. The main sources of sewage from this plant are domestic sewage in Changping City, Beijing, industrial sewage in Changping Science and Technology Park, and sewage in Shahe University Town. The construction waste was collected from a construction site near Tingzizhuang Village, Changping District, Beijing. The main components are muck, bricks, rubble, gravel, concrete blocks, and a small amount of wood and broken glass. See Table 1 and Table 2 for the basic physical and chemical properties of sludge and construction waste mixed in various proportions. The plant materials were seedlings of Ailanthus altissima, and the seeds were p...

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Abstract

The invention discloses an ecological restoration method using urban sludge. The method is characterized in that the sludge and waste construction soil are mixed based on volume ratio to prepare a mixed substrate, wherein the volume percent of the sludge is 40-60%, and the balance is the waste construction soil. According to the method, the sludge and the construction wastes are reasonably mixed, so that the capability of ailanthus and other trees absorbing heavy metal in the sludge can be effectively improved; the pretreatment of plant seeds and later-period management of water are carried out, so that the plant seed germination rate and the later growth are ensured, and as a result, the enriching and transferring of the plants to harmful materials such as heavy metal can be improved, and the land can be effectively improved.

Description

technical field [0001] The invention relates to the fields of environmental protection and ecological restoration, in particular to a method for using urban sludge for ecological restoration. Background technique [0002] With the rapid development of my country's economy and urbanization, the amount of urban sludge and construction waste has increased dramatically. Construction waste is construction waste generated in the process of urban construction, with extremely low nutrient content, less soil, more hard lumps, and low utilization rate of resources; urban sewage sludge (sewage sludge) is produced in the process of wastewater treatment by urban sewage treatment plants. It is rich in various nutrients needed for plant growth, and its nourishing effect is obviously better than that of isotrophic fertilizers. Therefore, land use is a positive and effective disposal method for sludge, but sludge also contains harmful Heavy metal elements, such as As, Cd, Cu, Ni, Pb, Zn, et...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/10A01G17/00
CPCA01G17/005A01G24/00
Inventor 冷平生胡增辉窦德泉甄晨光高凡
Owner BEIJING UNIV OF AGRI
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