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Combination repair method of heavy metal pollution soil using energy-source plant and mushroom

A technology of energy plants and polluted soil, which is applied in the field of environmental new energy, to achieve the effects of mature cultivation technology, short growth cycle and wide repair range

Inactive Publication Date: 2009-03-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings of plants and mushrooms alone in remediating heavy metal pollution, through the joint planting of energy plants and mushrooms, to improve the ability of biological associations to enrich heavy metals, and to obtain energy benefits at the same time, to provide a short-cycle, Composite restoration technology that is easy to implement and fully utilizes land resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, the interplanting of energy plant sweet sorghum (Sorghum bicolor) and golden blessing mushroom (Tricholoma giganteum Massee), which can highly enrich soil heavy metals, is used to remove soil cadmium (Cd) pollution.

[0030] Restoration process: sowing sweet sorghum in heavy metal-contaminated soil → preparation, fermentation, and germination of golden blessing mushroom culture medium → golden blessing mushroom interplanting between sweet sorghum → golden blessing mushroom and sweet sorghum grow and enrich heavy metals → harvest and mature Mushroom body → harvest sweet sorghum → ferment sweet sorghum to produce fuel ethanol → ferment mushroom and plant residue to produce biogas → biogas slurry sedimentation to remove heavy metals → sedimentation and biogas residue centralized landfill.

[0031] (1), sowing sweet sorghum

[0032] Sow sweet sorghum in mid-June, and dry the seeds for 2 to 3 days before sowing, adopt the method of on-demand sowing, with a r...

Embodiment 2

[0046] In this example, the energy plant castor (Ricinus communis) was intercropped with the big cup umbrella (Clitocybe maxima) to remove cadmium, lead, zinc, copper, and arsenic from heavy metal-polluted soil.

[0047] Restoration process: preparation and fermentation of the culture material of the umbella culture medium → laying the culture material in the heavy metal-contaminated soil ditch → inoculating the umbella and growing bacteria → interplanting castor in the rows → growing and combining the umbel and the castor Enrich heavy metals→harvest mature mushroom body→harvest castor fruit, harvest castor oil→castor bean fruit to produce biodiesel, stalks are used for papermaking, building materials→big cup umbrella mushroom body and plant residue fermented to produce biogas→biogas slurry sedimentation Removal of heavy metals→sedimentation and biogas residue centralized landfill.

[0048] (1) Preparation of Dabei umbrella cultivation ditch

[0049] In February, two ditches ...

Embodiment 3

[0064] In this example, the energy plant rape (brassica napus) and Coprinus comatus (Coprinus comatus) are intercropped to restore heavy metal ions such as lead, zinc, and cadmium in heavy metal-polluted soil.

[0065] Restoration process: Coprinus comatus culture material preparation, fermentation and germination → Coprinus comatus and rapeseed interplanted in heavy metal contaminated soil → Harvesting Coprinus comatus → Harvesting rapeseed → Rapeseed used for biodiesel production → Plant stems and Coprinus comatus Biogas production by fermentation → chemical precipitation to remove heavy metals from biogas slurry → centralized landfill of biogas residue and sediment.

[0066] Rapeseed is currently an energy plant that our country is focusing on developing. It is widely cultivated in various parts of our country, especially in the southern region, and can grow on various soil types. Coprinus comatus interplanted rapeseed yields about 100kg of rapeseed per mu, about 28kg of bi...

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PUM

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Abstract

The invention relates to an energy source plant-mushroom fungus combined renovating technique for heavy metal polluted soil, belonging to the technical field of environmental energy sources. Energy source plants and mushroom fungus are planted in intercrop, interplanting or crop rotation on the polluted soil for enriching heavy metal ions; after materializing processing or biofermentation, the mature plants generate energy source substance to be used in the field of industrial fuel; plant residue and mushroom fungus body are put in a biogas tank with certain proportion to generate biogas; heavy metal ions in the methane liquid can be removed through chemical deposition; and the chemical deposition and biogas residues are intensively filled and buried. The energy source plant enricher in the invention can renovate deep soil, beautify the environment and generate energy source benefits and can be planted in large area, while the mushroom fungus enricher has the advantages of strong heavy metal ion enriching ability, short growth period and mature planting technique; the energy source plant and the mushroom fungus are combined to renovate the heavy metal polluted soil so as to achieve higher renovating efficiency and get energy benefits. 10-20 percent of polluted heavy metal can be removed in the cultivation layer of the soil per year.

Description

Technical field: [0001] The invention belongs to the technical field of new environmental energy, and in particular relates to a method for jointly repairing heavy metal-contaminated soil by energy plants and mushrooms. Background technique: [0002] The development of industry and agriculture and the acceleration of urbanization have made the problem of soil heavy metal pollution increasingly prominent, including cadmium (Cd), lead (Pb), chromium (Cr), mercury (Hg), arsenic (As), nickel (Ni), copper (Cu), zinc (Zn) and so on are more common heavy metals polluting. The global average annual emission of Hg is about 15,000 tons, Cu is 3.4 million tons, Pb is 5 million tons, Mn is 15 million tons, and Ni is 1 million tons, which seriously damages the ecological environment balance and the sound development of agricultural economy. At present, the farmland soil polluted by heavy metals in my country is about 2500×10 4 Hectares, as many as 12 million tons of grain are polluted ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09B5/00
Inventor 徐恒姬凌云冯军黄海燕敬小兵戴九州袁恬
Owner SICHUAN UNIV
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