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Method for repairing heavy metal pollution in town domestic refuse compost by dicotyledonous ruderal

A technology for municipal solid waste and heavy metals, which is applied in the field of environmental pollution remediation engineering, can solve problems such as no literature reports in research, and achieve the effects of convenient operation, reduced content, and reduced transportation costs.

Inactive Publication Date: 2008-05-28
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no literature report on this

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Sorting and sieving the municipal solid waste compost containing heavy metal pollution from the Xiaodian Compost Plant to remove the water in the compost and prepare it as a weed substrate;

[0056] (2) In the compost substrate experimental base of Tianjin Normal University, the soil with weed propagules was inoculated at normal temperature, and the weed vegetation system was established; the soil contained amaranth, purslane, gray vegetable, and Dawanhua , narrow-leaf amaranth and other seeds. The soil of the weed propagule: the ratio of parts by weight of the compost substrate is 1:1000 parts.

[0057] (3) Maintain the moisture of the substrate during the growth of weeds, and uniformly ration water every day to ensure good humidity in the experimental field;

[0058] (4) After the weeds have grown for 60 days, the weeds are cut, and then rinsed with water to remove the soil and dirt adhering to the weeds; then divided into three parts: roots, stems, and leaves, a...

Embodiment 2

[0062] (1) Sorting and sieving the compost of urban domestic waste polluted by heavy metals to remove the water in the compost and prepare it as a weed substrate;

[0063] (2) In the compost matrix experimental base at normal temperature, inoculate the soil with weed propagules to establish the weed vegetation system; the soil contains amaranth, purslane, gray vegetable, syringa, narrow leaf amaranth. The soil of the weed propagule: the weight and number ratio of the compost substrate is 0.5: 1000 parts.

[0064] (3) Keep the moisture in the substrate after the weeds are sown and during the weed growth period, and provide uniform and quantitative water every day to ensure good humidity in the experimental field.

[0065] (4) After the weeds have grown for 90 days, the weeds are cut, and then fully rinsed with tap water to remove the soil and dirt adhering to the plant samples; then divided into three parts: roots, stems and leaves, and then used Rinse with ionized water, dra...

Embodiment 3

[0069] Sorting the heavy metal-polluted urban domestic waste compost, sieving to remove the water in the compost and preparing it as a weed substrate; in the experimental field at room temperature, inoculate the soil with weed propagules on the compost substrate to carry out the weed vegetation system Planting; the soil contains seeds such as amaranth, purslane, gray vegetable, dawanhua, narrow-leaved amaranth. Weed propagule soil: the weight and number ratio of compost substrate is 0.7:1000 parts.

[0070]Maintain the moisture of the substrate after sowing and weed growth, and uniformly ration water every day to ensure good humidity in the experimental field. After the weeds have grown for 90 days, cut the weeds, and then rinse with water to remove the soil and dirt adhering to the weeds; then divide them into three parts: roots, stems, and leaves, rinse with deionized water, and drain the water Finally, put it in an oven and dry it to constant weight; the dried sample is pu...

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PUM

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Abstract

The invention discloses a method of utilizing dicot weeds to remedy heavy metal pollution in compost of municipal domestic waste, and inoculates zero point five per mill to one per mill of soil with weeds propagule to compost substrate to carry out the construction of a weeds vegetation system; when the weeds grow for 45 to 90 days, the weeds are cradled and divided in three parts of roots, stems and leaves, then are washed with deionized water; after dehydrated, the weeds are put in an oven and are roasted to constant weight; dried samples are grinded, and the heavy metal of Mn, Ni, Cu, Zn and Cd or Pb contents in the weeds are measured. The processing method of the invention can enrich a great quantity of heavy metal into the weeds and transport the heavy metal to parts above ground; the heavy metal can be recycled after the weeds are harvested and incinerated; thus the content of the heavy metal in the compost of waste can be reduced, and the aim of innoxious utilization of the compost of municipal domestic waste can be realized.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution restoration engineering, and relates to a restoration method for heavy metals in urban domestic waste composting. More specifically, it is a method of using dicotyledon weeds to remediate heavy metal pollution in municipal solid waste composting. Background technique [0002] With the rapid development of my country's economy, urban environmental problems have become increasingly prominent. As a very prominent problem of urban environmental pollution, domestic waste has become a major aspect that plagues the sustainable development of my country's urban economy and affects the lives and health of residents. At present, the output of domestic waste in most cities in my country continues to increase. According to statistics, by 1998, my country had accumulated 6 billion tons of urban solid waste, occupying about 540 million m3 of land. 2 , about more than 200 cities are surrounded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00
CPCY02W30/40
Inventor 多立安赵树兰廉菲
Owner TIANJIN NORMAL UNIVERSITY
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