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 abil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example one

[0029] In this example, the energy plant sweet sorghum (Sorghum bicolor) and the enoki mushroom (Tricholoma giganteum Masse) which can highly enrich soil heavy metals are interplanted to remove soil cadmium (Cd) pollution.

[0030] Remediation process: sowing sweet sorghum in heavy metal contaminated soil → preparation, fermentation, and growth of enoki mushroom medium material → interplanting enoki mushroom between sweet sorghum → enoki mushroom and sweet sorghum grow and accumulate heavy metals → harvest mature Mushroom body → harvest sweet sorghum → sweet sorghum fermentation to produce fuel ethanol → enoki mushroom and plant residue fermentation to produce biogas → biogas slurry precipitation 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. Use on-demand sowing. The row spacing is 80-100cm, and the plant ...

Example Embodiment

[0045] Example two

[0046] In this example, the energy plant Ricinus communis and Clitocybe maxima are intercropped to remove cadmium, lead, zinc, copper, and arsenic in soil contaminated by heavy metals.

[0047] Remediation process: preparation and fermentation of large cup umbrella medium material→spread the medium material in the heavy metal contaminated soil ditch→inoculate large cup umbrella and develop bacteria→interplanting castor-oil plant between rows→large cup umbrella and castor-oil plant grow together Enrichment of heavy metals → harvesting mature mushroom bodies → harvesting castor beans, harvesting castor beans → making biodiesel from castor beans, using stalks for papermaking and building materials → fermentation of large cup mushroom bodies and plant residues to produce biogas → biogas slurry precipitation Removal of heavy metals → centralized landfill of sediment and biogas residue.

[0048] (1) Preparation of cultivating ditch for big cup umbrella

[0049] In F...

Example Embodiment

[0063] Example three

[0064] In this example, the energy plant rape (brassica napus) and Coprinus comatus (Coprinus comatus) were used as an interplant to repair heavy metal ions such as lead, zinc, and cadmium in the soil contaminated by heavy metals.

[0065] Remediation process: preparation of culture medium for Coprinus comatus, fermentation and growth → Coprinus comatus, rape interplanted in heavy metal contaminated soil → Harvesting of Coprinus comatus → harvesting of rapeseed → Rapeseed for biodiesel production → Plant stalk and Coprinus comatus Fermentation to produce biogas → chemical precipitation to remove heavy metals from biogas slurry → centralized landfill of biogas residue and sediment.

[0066] Rapeseed is currently the energy plant that our country is developing vigorously. It is widely cultivated in various parts of our country, especially in the south, and can grow in various soil qualities. The rapeseed produced by intercropping Coprinus comatus has a yield o...

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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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