CN110496853A - A method of improving Soil self-purification - Google Patents
A method of improving Soil self-purification Download PDFInfo
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- CN110496853A CN110496853A CN201910672939.5A CN201910672939A CN110496853A CN 110496853 A CN110496853 A CN 110496853A CN 201910672939 A CN201910672939 A CN 201910672939A CN 110496853 A CN110496853 A CN 110496853A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention relates to technical field of soil remediation, more particularly to and disclose it is a kind of improve Soil self-purification method, include the following steps: that Soil tillage screens out solid refuse and dries；Dig fermentation hole；Fermented material is rubbed to stir evenly into fermentation hole, and surface water spray keeps the temperature one time fermentation；Temperature is raised to 60 DEG C of turnings, primary at interval of turning in 4-5 days, after 25-30 days, if temperature drops to 40 DEG C, addition moisture to moisture content 35%, continue fermentation until in 3 days temperature < 40 DEG C, terminate fermentation；Fermented material is according to 20-100g/m3Amount be uniformly mixed in and turn in the contaminated soil dried, appropriate potassium fulvate is added, earthworm is uniformly mixed, surface covers the straw of moisture content 40-50%, keeps the temperature secondary fermentation 30 days, natural degradation.The present invention it is a kind of improve Soil self-purification method, it is without secondary pollution, have it is at low cost, self-purification capacity is strong, easily promote the advantages of.
Description
Technical field
The present invention relates to technical field of soil remediation more particularly to a kind of methods for improving Soil self-purification.
Background technique
Soil be a movement, balance, the complex material system that is always at semisteady-state.When foreign substance into
When entering soil, it makes great efforts to keep the stabilization of self property by various effects, it is known as Soil self-purification by us.Soil
Purification speed is that comparison is slow, and detergent power is also limited.So putting into a certain amount of pollutant into soil is to be permitted
It perhaps, but has been more than that limit will result in harm, therefore the assurance measured is extremely important.When the quantity or pollution speed of pollutant
When degree has been more than the detergent power of soil, the natural dynamic equilibrium of soil itself will be destroyed, make the cumulative process of pollutant by
It is gradually dominant, so as to cause the imbalance of soil normal function, soil quality decline.
With deepening continuously for China's process of industrialization, various industries are developed on a large scale very much, petroleum, municipal refuse,
The continuous infiltration of harmful substance, causes the soil contamination problem in China to be on the rise in industrial residue, pesticide, has been more than soil
Self-purification capacity, seriously threaten the mankind living environment and agricultural sustainable development.Currently, although the physics of contaminated soil
It repairs, chemical remediation and Engineering Remediation Techniques have obtained and be centainly in progress and some practical techniques, but these reparation sides occur
Method often destroys the physicochemical property of contaminated soil, or even will cause the secondary pollution to environment, it is huge for contaminated area and
The lighter soil of pollution level is substantially difficult to apply.The phytoremediation of the inorganic pollutions such as heavy metal and the biology of organic contamination
Overcome these disadvantages although repairing, by these technologies itself intrinsic some application conditions limitation, it is real repairing
It is also difficult to promote in trampling, even being only at the experimental stage mostly is phase of basic research.In this case, ecosystem is utilized
The self-repairing capability of system solves the problems, such as the reparation of pollution environment especially contaminated soil from the height of ecological principle, for
Realize that the harmonious development of man and nature is of great significance.
Existing various drawbacks are repaired in view of current physics, chemistry and engineering, develop a kind of raising Soil self-purification
Method be more in line with ecological disciplines to accelerate the natural degradation of soil pollutant, it is without secondary pollution, at low cost, for green
Color soil restoring technology has particularly important practical application value.
Summary of the invention
In view of the defects existing in the prior art, the present invention provides one kind and does not add any chemical substance, does not change soil
Mass-energy, it is without secondary pollution, it is at low cost, the natural degradation of each pollutant in soil can be accelerated, the strong raising soil of self-purification capacity is certainly
The method of net effect.
For achieving the above object, the present invention adopts the following technical scheme that:
A method of Soil self-purification is improved, further includes following steps:
1) contaminated soil is turned over, ploughed depth 20-40cm, screens out solid refuse therein, dried 5-7 days；To subsoil
Earth carries out sunning disinfection, and removes solid refuse.
2) select one piece of topography flat, the leeward area without shade close to water source digs at least one fermentation hole；Close to the leeward of water source
Area without shade, it is convenient to add water in time, and it is conducive to heat-preservation fermentation.The number cheated of fermenting is related with contaminated soil area to be treated.
Can be spaced a distance one fermentation hole of digging, and subsequent fermentation material is facilitated to be transported to the different zones of contaminated soil.
3) it is put into after rubbing fermented material in the fermentation hole of step 2 and forms a heap, stirred evenly, sprayed water, make on surface
Its moisture content reaches 45%-60%, one layer of straw in fermented material surface cover；Straw ensures that temperature improves as thermal insulation material
While, it can available ventilation.
4) turning after the fermented material temperature that step 3) is handled well rises to 60 degrees Celsius, later at interval of turning in 4-5 days
Once, after fermenting 25-30 days, if temperature drops to 40 degrees Celsius, addition moisture to being 35% to fermented material moisture content, after
Supervention ferment terminates fermentation until fermented material temperature is respectively less than 40 degrees Celsius in 3 days；
5) fermented material for fermenting step 4) digs up, and is uniformly mixed in step 1) treated in contaminated soil, ferment material
The additive amount of material is 20-100g/m3, specific that how many depending on pollutant kind and concentration, addition potassium fulvate 30- is added
It 60Kg/ mus, Kg/ mus of earthworm 30-60, is uniformly mixed, surface covers one layer of straw, and straw surface water spray reaches straw moisture content
40%-50% keeps the temperature secondary fermentation 30 days later, natural degradation.Fermented material is all taken at nature, fermented rear all kinds of micro- lifes
Object growth is vigorous, can increase Soil Microorganism chain after being added to contaminated soil, then with earthworm chesson, make each quasi-microorganism
It preferably plays a role, to promote the self-purification capacity of soil.
By turning over lower soil, sunning disinfection removes solid refuse, is added to Polluted Soil after fermented material one time fermentation
Earth secondary fermentation again carries out natural degradation, and the restorative procedure is environmentally protective, administers in soil course and does not generate two to natural environment
Secondary pollution, simple process are easy to spread.
Preferably, the hole of fermentation described in step 2 is 2 meters wide, deep 1.5 meters, length regard contaminated area and pollution concentration and
It is fixed.This depth and width setting is conducive to the fermentation of fermented material.
Preferably, fermented material described in step 3) is the withered branch of 20%-40% weight ratio, 30%-40% weight ratio
Rubbish from cooking, the coconut husk of 10%-20% weight ratio, the cattle and sheep excrement of 10%-30% weight ratio.The rubbish from cooking include vegetables,
The one or more of rice or meat.Withered branch, rubbish from cooking, coconut husk, cattle and sheep excrement are all easy to obtain, can become give up into
Treasured, it is very economical, and secondary chemical contamination will not be caused to soil.
Preferably, withered branch of the fermented material described in step 3) for 40% weight ratio, the rubbish from cooking of 40% weight ratio,
The coconut husk of 10% weight ratio, the cattle and sheep excrement of 10% weight ratio.
Preferably, withered branch of the fermented material described in step 3) for 30% weight ratio, the rubbish from cooking of 30% weight ratio,
The coconut husk of 20% weight ratio, the cattle and sheep excrement of 20% weight ratio.
Preferably, withered branch of the fermented material described in step 3) for 20% weight ratio, the rubbish from cooking of 30% weight ratio,
The coconut husk of 20% weight ratio, the cattle and sheep excrement of 30% weight ratio.
A kind of method of raising Soil self-purification of the invention, by turning over lower soil, solid is removed in sunning disinfection
Rubbish is added to contaminated soil after fermented material one time fermentation and carries out secondary fermentation natural decomposition again, do not add any chemicals
Matter does not change soil property, without secondary pollution, can accelerate the natural degradation of each pollutant in soil, have it is at low cost, from net energy
The advantages of power is strong, easily promotes.
Specific embodiment
The present invention is described further for specific embodiment below.
Embodiment 1
A method of Soil self-purification is improved, further includes following steps:
1) contaminated soil is turned over, ploughed depth 20cm, screens out solid refuse therein, dried 5 days；
2) select one piece of topography flat, the leeward area without shade close to water source digs a fermentation hole, and fermentation hole is 2 meters wide, and it is 1.5 meters deep, it is long
2 meters；
3) it is put into after rubbing fermented material in the fermentation hole of step 2 and forms a heap, stirred evenly, sprayed water on surface, contain it
Water rate reaches 45%, one layer of straw in fermented material surface cover；
4) turning after the fermented material temperature that step 3) is handled well rises to 60 degrees Celsius, primary at interval of turning in 4 days later, hair
After ferment 25 days, if temperature drops to 40 degrees Celsius, the moisture content of addition moisture to fermented material is 35%, continues to ferment, until
Temperature is respectively less than 40 degrees Celsius in 3 days, terminates fermentation；
5) fermented material for fermenting step 4) digs up, and is uniformly mixed in step 1) treated in contaminated soil, ferment material
The additive amount of material is 50g/m3, it is added potassium fulvate 30Kg/ mus, 50 Kg/ mus of earthworm, is uniformly mixed, surface covers one layer of rice
Grass, straw surface water spray, makes straw moisture content up to 40%, keeps the temperature secondary fermentation 30 days later, natural degradation.
Fermented material described in step 3) is the withered branch of 40% weight ratio, the rubbish from cooking of 40% weight ratio, 10% weight ratio
Coconut husk, the cattle and sheep excrement of 10% weight ratio.Rubbish from cooking includes vegetables, rice and meat.
Embodiment 2
A kind of method and step improving Soil self-purification is as described in Example 1, the difference is that: the ploughed depth of step 1)
For 30cm, dry 7 days；The fermented material of step 3) is the withered branch of 30% weight ratio, the rubbish from cooking of 30% weight ratio, 20% weight
The coconut husk of ratio is measured, the cattle and sheep excrement of 20% weight ratio, water content is 50% after surface is sprayed water；Step 4) is primary at interval of turning in 5 days,
If temperature drops to 40 degrees Celsius after fermentation 30 days, the moisture content of addition moisture to fermented material is 35%, continues to ferment；Step
The additive amount of rapid 5) fermented material is 20g/m3, it is added potassium fulvate 50Kg/ mus, 40 Kg/ mus of earthworm, is uniformly mixed, surface is covered
One layer of straw of lid, straw surface water spray, makes straw moisture content up to 50%.
Embodiment 3
A kind of method and step improving Soil self-purification is as described in Example 1, the difference is that: the ploughed depth of step 1)
For 25cm, dry 6 days；The fermented material of step 3) is the withered branch of 20% weight ratio, the rubbish from cooking of 30% weight ratio, 20% weight
The coconut husk of ratio is measured, the cattle and sheep excrement of 30% weight ratio, water content is 60% after surface is sprayed water；Step 4) is primary at interval of turning in 5 days,
If temperature drops to 40 degrees Celsius after fermentation 28 days, the moisture content of addition moisture to moisture content fermented material is 35%, after supervention
Ferment；The additive amount of step 5) fermented material is 100g/m3, it is added potassium fulvate 60Kg/ mus, 30 Kg/ mus of earthworm, is uniformly mixed,
Surface covers one layer of straw, and straw surface water spray makes straw moisture content up to 45%.
Using a kind of method for improving Soil self-purification, pollutant in soil content compares above-described embodiment before and after the processing
It is as shown in Table 1:
Table one
As can be seen from Table I, by this method, (pH, BOD5, ammonia nitrogen, Cd cadmium, Cu copper) in contaminated soil is substantially reduced,
Contaminated soil is purified, while not having secondary pollution, at low cost, good purification.
It is in summary only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention, Fan Yibenshen
Please equivalent changes and modifications made by the content of the scope of the patents, all should be technology scope of the invention.
Claims (6)
1. a kind of method for improving Soil self-purification, it is characterised in that: further include following steps:
1) contaminated soil is turned over, ploughed depth 20-40cm, screens out solid refuse therein, dried 5-7 days；
2) select one piece of topography flat, the leeward area without shade close to water source digs at least one fermentation hole；
3) it is put into after rubbing fermented material in the hole of fermentation described in step 2 and forms a heap, stirred evenly, sprayed water, make on surface
Its moisture content reaches 45%-60%, one layer of straw in fermented material surface cover；
4) turning after the fermented material temperature that step 3) is handled well rises to 60 degrees Celsius, it is primary at interval of turning in 4-5 days later,
After fermentation 25-30 days, if temperature drops to 40 degrees Celsius, addition moisture to fermented material moisture content is 35%, continues to ferment,
Until fermented material temperature is respectively less than 40 degrees Celsius in 3 days, terminate fermentation；
5) fermented material for fermenting step 4) digs up, and is uniformly mixed in step 1) treated in contaminated soil, ferment material
The additive amount of material is 20-100g/m3, it is added potassium fulvate 30-60Kg/ mus, Kg/ mus of earthworm 30-60, is uniformly mixed, surface is covered
One layer of straw of lid, straw surface water spray, makes straw moisture content up to 40%-50%, keeps the temperature secondary fermentation 30 days later, natural degradation.
2. a kind of method for improving Soil self-purification according to claim 1, it is characterised in that: hair described in step 2
Ferment hole is 2 meters wide, and 1.5 meters deep, length is depending on contaminated area and pollution concentration.
3. a kind of method for improving Soil self-purification according to claim 1, it is characterised in that: hair described in step 3)
Withered branch of the ferment material for 20%-40% weight ratio, the rubbish from cooking of 30%-40% weight ratio, the coconut husk of 10%-20% weight ratio,
The cattle and sheep excrement of 10%-30% weight ratio.
4. a kind of method for improving Soil self-purification according to claim 3, it is characterised in that: hair described in step 3)
Ferment material is the withered branch of 40% weight ratio, the rubbish from cooking of 40% weight ratio, the coconut husk of 10% weight ratio, the cattle and sheep of 10% weight ratio
Excrement.
5. a kind of method for improving Soil self-purification according to claim 3, it is characterised in that: hair described in step 3)
Ferment material is the withered branch of 30% weight ratio, the rubbish from cooking of 30% weight ratio, the coconut husk of 20% weight ratio, the cattle and sheep of 20% weight ratio
Excrement.
6. a kind of method for improving Soil self-purification according to claim 3, it is characterised in that: hair described in step 3)
Ferment material is the withered branch of 20% weight ratio, the rubbish from cooking of 30% weight ratio, the coconut husk of 20% weight ratio, the cattle and sheep of 30% weight ratio
Excrement.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014266A (en) * | 2019-12-26 | 2020-04-17 | 中国有色金属长沙勘察设计研究院有限公司 | Red mud yard soil improvement method |
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