CN106311733A - Method for remediating soil by using thermal desorption and microbial technology - Google Patents
Method for remediating soil by using thermal desorption and microbial technology Download PDFInfo
- Publication number
- CN106311733A CN106311733A CN201610830066.2A CN201610830066A CN106311733A CN 106311733 A CN106311733 A CN 106311733A CN 201610830066 A CN201610830066 A CN 201610830066A CN 106311733 A CN106311733 A CN 106311733A
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- soil
- thermal desorption
- microbial
- heat
- remediating
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Classifications
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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
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
-
- 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
-
- 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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mycology (AREA)
- Soil Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Botany (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a method for remediating soil by using thermal desorption and a microbial technology. The soil is remediated by utilizing a thermal desorption soil remediating system, and the method comprises the following steps: firstly, preheating contaminated soil by adopting a preheating device, then, heating the preheated contaminated soil by adopting a heating device to separate contaminants in the soil, and finally, recovering heat of the soil from which the contaminants are separated by adopting a heat recovery device; remediating the soil by utilizing the microbial technology; applying organic fertilizer to the soil treated by thermal desorption per mu, and plowing the organic fertilizer under the soil by a rotary cultivator; then, sprinkling the soil to keep soil humidity, and then, evenly spraying microbial soil remediating inoculant; and evenly spraying the microbial soil remediating inoculant once after two months to finish soil remediation after three months. According to the method disclosed by the invention, by adopting thermal desorption and the microbial technology, a breeding condition in favor of microbial strains is created by utilizing a physical and biological method, and the soil is remediated in manner of nature, return and equilibrium.
Description
Technical field
The invention belongs to the technical field of soil remediation in environmental conservation, particularly relate to a kind of use Thermal desorption and
The method of microbial technique rehabilitating soil.
Background technology
Soil is organic matter, the soil life produced by the mineral of rock decay, animals and plants, microorganism residuum decomposition
Thing and moisture, air, the composition such as humus of oxidation.Its composition is substantially: air and water respectively accounts for 25%, solid accounts for
45%, organic matter accounts for 3%～4%, microorganism accounts for about 1%, and this ratio is once lacked of proper care, and is unhealthy soil.They are mutual
It is associated, conditions each other, provide required goods and materials condition for plant growth.For the formation of soil, the various factors of soil formation
Having property of equal importance and mutual irreplaceability, wherein microorganism plays mastery reaction.It may be said that soil is at certain gas
Waiting and under orographic condition, the microorganism species lived act on soil parent material and formed, soil is lived, because healthy
Soil also exist about 1% beneficial microbe.
The arable land of China causes nutrient to run off in a large number owing to robbing the continuous farming of formula in decades, ploughs and is seriously broken
Bad, the excess of chemical pesticide and all kinds of waste pollution, chemical fertilizer is unbalance in addition uses, and causes the sustainable output capacity of soil continuous
Reduce, arrived and weakened national power, shake state's base, jeopardize the degree of descendants.Count according to domestic nearly 200 soil nutrients detection
According to analysis, the whole nation arable soil content of organic matter is on the low side, and the most only 1.8%, nonirrigated farmland is only about 1%, with American-European countries
Soil fertility level differs 1-3 times, over nearly 10 years, and the soil organic matter of cultivated land content continuous decrease in some province, decrease by more than 20%；
Plough and all apply fertilizer imbalance, lavishment chemical fertilizer, generally occur that soil degradation, topsoil shoal, tilth is deteriorated, degradation under water holding capacity
Phenomenon.Northwest, North China's large area frequently occur sandstorm, with the deterioration of arable land physics and chemistry, crumb structure destruction, desertifying has ten
Divide close relationship.
According to World Health Organization's data, 3 months babies can be caused a disease, be produced blue baby's disease by nitrate, and mortality rate is up to
8‰；Secondly, nitrate can be converted into nitrite and secondary amine or other amine synthesis nitrosamine in human body, causes digestion
Gastric cancers.According to agricultural university of China data, year absorbs nitrate 1,000,000 milligram/year people per capita.Strange sick, strange illness in urban and rural residents
All relevant with this, heavy metal migrates into the human body by food chain, accumulates gradually in human body, causes in the chronic heavy metal of human body
Poison, causes kidney, liver, pulmonary, skeleton, genitals, immune system, cardiovascular system injury, health is caused pole
Big harm.
Along with the development of society with industrialized gradually aggravate, industrial pollution place is gradually increased, in order to ensure ecological ring
Border and the health of human body, in contaminated site, the reparation of contaminated soil has become the problem needing to solve too impatient to wait.The most existing
For having technology, soil restoring technology includes burning, Thermal desorption, Soil leaching, dystopy stabilization technology and biodegradation etc..Its
Middle China mostly uses incineration technology when processing hazardous waste and contaminated soil, but burns the property directly destroying soil itself
Matter, makes soil lose original function, and energy consumption is higher, easily produces secondary pollution.For comparing incineration technology, Thermal desorption
Technology receives increasing attention by the pollutant in mode of heating separation soil.But existing soil remediation is pyrolyzed
Analysis technical costs is higher, especially when a large amount of soil are heated by needs, needs substantial amounts of heat.In view of this, the most effectively drop
The hot rehabilitation cost of low stain soil, is those skilled in the art's problems of needing solution badly.
Summary of the invention
The deficiency that the present invention exists to overcome prior art, it is provided that a kind of rehabilitation cost is cheap, repairing effect is preferable
Use Thermal desorption and the method for microbial technique rehabilitating soil.
The present invention is achieved by the following technical solutions: a kind of side using Thermal desorption and microbial technique rehabilitating soil
Method, it comprises the steps:
A, utilize Thermal desorption soil repair system that soil is repaired；Soil repair system includes preheating device and pre-hot charging
Put the heater being connected and the heat reclamation device being connected with heater；
B, initially with preheating device, contaminated soil is preheated, then use heater, after heating the pre-heat treatment
Contaminated soil, separates the pollutant in soil, finally uses heat reclamation device to reclaim the heat of the soil being separated pollutant
Amount；
C, utilize microbial technique that soil is repaired: by every mu of the soil ground application of organic fertilizers 1 processed through Thermal desorption～
1.5 tons, fertilizer rotary cultivator is ploughed under in soil；
D, then on soil watering keep soil moisture 60%～80%, more uniformly spray microbe soil remediation microbial inoculum；
E, after 2 months the most uniformly spray a microbe soil remediation microbial inoculum, i.e. complete soil remediation after 3 months, make to be repaired
The physical and chemical index of soil reaches the soil secondary standard of Chinese soil standard.
Soil remediation microbial inoculum in step d and step e uses the microorganism fungus kind formula mutually not producing antagonism, this formula
Including actinomycetes, yeast actinomycetes, bacillus cereus, mycete, photosynthetic bacteria, rhizosphere bacterium and multiple beneficial microorganism and various born of the same parents
Outer enzyme, its flora acts on soil jointly, produces the material phosphoglycan of a kind of glue, by all kinds of molecules in soil
Bond together, form good crumb structure.
Heater in step a is rotary kiln, and preheating device includes soil preheating channel and for logical to soil preheating
What road heated adds hot channel, and soil preheating channel is connected with rotary kiln.Soil repair system in step a also includes Heat transmission
Device, heat reclamation device is connected with preheating device through heat transfer apparatus, make heat reclamation device as the thermal source of preheating device, i.e.
Use heat transfer apparatus that the heat of recovery is used for being contaminated the thermal source of soil the pre-heat treatment.
The present invention utilizes the special microorganism species not producing antagonism jointly to act on soil, produces the thing of a kind of glue
Molecules all kinds of in soil are bonded together, form good crumb structure by matter phosphoglycan, be beneficial to water, fertilizer, gas,
Naturally the circulation of heat, soil would not harden, desertify.The most substantial amounts of beneficial microorganism frequent activities, from reproduction, procreation to
In death process, moreover it is possible to decompose the pesticide in soil and fertilizer residue；Utilize the mineralization process of heavy metal ion by free state
Heavy metal ion is progressively converted into solidfied material, and by physics settlement action, thus the polluter in successive elimination soil.To
Soil puts into fertilizer, both kept soil moisture content, helped microbial reproduction, enhancing soil remediation strength, moreover it is possible to given back soil
The a large amount of nutrients taken away by product in planting process.This method use heavy metal ion, chemical residue dispel have aobvious
Write the unique microorganisms strain formula of effect, when temperature more than 10 degrees Celsius, general about 35 days heavy metal ion contents
Can reduce by 50%, chemical residue can reduce by 60%.
By soil compaction, desertification, disease is serious, as a example by the green house of vegetables that cannot plant: when temperature more than 10 degrees Celsius,
Treated fertilizer 1～1.5 tons are used in every mu of ground, plough under in soil with rotary cultivator；Watering keeps soil moisture 60%
～80%, more uniformly spraying special microbe soil remediation microbial inoculum, microbial inoculum consumption determines depending on soil degradation situation；After 60 days again
Uniformly spraying a microbe soil remediation microbial inoculum, consumption is identical with first time, and after 3 months, soil remediation is basically completed, soil
Physical and chemical index is up to GB15618-1995 secondary standard.Using the soil remediation method that the present invention provides, booth every mu ground is average
Comprehensive repair cost about 2000 yuan, is that booth builds the 5%～10% of total cost, the degeneration in open ground soil such as hillside fields, field etc.
Situation is generally below booth, and its restorative procedure is developed programs according to the actual degenerate case of soil layer, and rehabilitation cost is relatively low.
The invention has the beneficial effects as follows: the present invention is existing carries out Thermal desorption process to soil, and recycling microbial technique is to soil
Earth is repaired, and makes soil remediation reach optimum efficiency, and the present invention is that a kind of rehabilitation cost is cheap, repairing effect preferably uses
Thermal desorption and the method for microbial technique rehabilitating soil.The present invention has given full play to the waste heat of the soil that is heated isolating pollutant
Effect, using the heat of waste heat as the thermal source of soil Heat Treatment, effectively reduce the Cost Problems of hot repairing polluted soil；
And the soil of the present invention is after discharging, soil having carried out the recycling of heat, therefore the present invention is not only advantageous to soil
Fast cooling, but also be prone to the quickly stuffing of soil.
Soil remediation method in the present invention contains to reduce heavy metal pollution of soil and the raising soil organism and microorganism
Amount is target, makes it produce absorption, sedimentation, oxidoreduction and ion by changing heavy metal physicochemical properties in soil
The series reaction such as exchange, reduce its transportable property in soil environment and biological effectiveness, reduce plant heavy metal
Absorb, reduce heavy metal to ecological environment and the harm of health.The present invention puts into fertilizer in soil, keeps soil moisture in the soil
Feelings, help microbial reproduction, enhancing soil remediation strength, give back a large amount of nutrients that soil is taken away by product in planting process.
Soil remediation method in the present invention uses the most state-of-the-art microbial technique, utilizes physics and biological method to create favourable
In the Reproduction Conditions of microbial strains, by nature, return, balance in the way of soil is repaired.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
A kind of method using Thermal desorption and microbial technique rehabilitating soil, it comprises the steps: a, utilizes Thermal desorption
Soil is repaired by soil repair system；Soil repair system includes that what preheating device was connected with preheating device adds hot charging
The heat reclamation device put and be connected with heater；B, initially with preheating device, contaminated soil is preheated, so
Rear employing heater, the contaminated soil after heating the pre-heat treatment, separate the pollutant in soil, finally use recuperation of heat dress
Put back into the heat receiving the soil being separated pollutant；C, utilize microbial technique that soil is repaired: will be through Thermal desorption
Every mu of the soil ground application of organic fertilizers 1～1.5 tons processed, ploughs under fertilizer rotary cultivator in soil；D, then on soil
Watering holding soil moisture is 60%～80%, more uniformly sprays microbe soil remediation microbial inoculum；E, the most uniformly spray after 2 months
Microbe soil remediation microbial inoculum, i.e. completes soil remediation after 3 months, make the physical and chemical index being repaired soil reach middle territory
The soil secondary standard of earth standard.
Soil remediation microbial inoculum in step d and step e uses the microorganism fungus kind formula mutually not producing antagonism, this formula
Including actinomycetes, yeast actinomycetes, bacillus cereus, mycete, photosynthetic bacteria, rhizosphere bacterium and multiple beneficial microorganism and various born of the same parents
Outer enzyme, its flora acts on soil jointly, produces the material phosphoglycan of a kind of glue, by all kinds of molecules in soil
Bond together, form good crumb structure.Heater in step a is rotary kiln, and preheating device includes that soil preheats
Passage and for soil preheating channel heating is added hot channel, soil preheating channel is connected with rotary kiln.Soil in step a
Earth repair system also includes heat transfer apparatus, and heat reclamation device is connected with preheating device through heat transfer apparatus, makes recuperation of heat fill
Put the thermal source as preheating device, use heat transfer apparatus that the heat of recovery is used for being contaminated the thermal source of soil the pre-heat treatment.
Last it should be noted that, above content is only in order to illustrate technical scheme, rather than the present invention is protected
The restriction of scope, simple modification that technical scheme is carried out by those of ordinary skill in the art or equivalent,
Spirit and scope all without departing from technical solution of the present invention.
Claims (4)
1. the method using Thermal desorption and microbial technique rehabilitating soil, it is characterised in that: described use Thermal desorption and micro-
The method of biotechnology rehabilitating soil comprises the steps:
A, utilize Thermal desorption soil repair system that soil is repaired；Described soil repair system includes preheating device and pre-
Heater that thermal is connected and the heat reclamation device being connected with heater；
B, initially with preheating device, contaminated soil is preheated, then use heater, after heating the pre-heat treatment
Contaminated soil, separates the pollutant in soil, finally uses heat reclamation device to reclaim the heat of the soil being separated pollutant
Amount；
C, utilize microbial technique that soil is repaired: by every mu of the soil ground application of organic fertilizers 1 processed through Thermal desorption～
1.5 tons, fertilizer rotary cultivator is ploughed under in soil；
D, then on soil watering keep soil moisture 60%～80%, more uniformly spray microbe soil remediation microbial inoculum；
E, after 2 months the most uniformly spray a microbe soil remediation microbial inoculum, i.e. complete soil remediation after 3 months, make to be repaired
The physical and chemical index of soil reaches the soil secondary standard of Chinese soil standard.
A kind of method using Thermal desorption and microbial technique rehabilitating soil the most according to claim 1, it is characterised in that:
Soil remediation microbial inoculum in described step d and step e uses the microorganism fungus kind formula mutually not producing antagonism, and this formula includes
Actinomycetes, yeast actinomycetes, bacillus cereus, mycete, photosynthetic bacteria, rhizosphere bacterium and multiple beneficial microorganism and various exoenzyme
Class, its flora acts on soil jointly, produces the material phosphoglycan of a kind of glue, by bonding for all kinds of molecules in soil
Together, good crumb structure is formed.
A kind of method using Thermal desorption and microbial technique rehabilitating soil the most according to claim 1, it is characterised in that:
Heater in described step a is rotary kiln, and described preheating device includes soil preheating channel and for pre-to described soil
What the passage of heat heated adds hot channel, and soil preheating channel is connected with described rotary kiln.
A kind of method using Thermal desorption and microbial technique rehabilitating soil the most according to claim 1, it is characterised in that:
Soil repair system in described step a also includes heat transfer apparatus, and described heat reclamation device is pre-with described through heat transfer apparatus
Thermal is connected, and makes heat reclamation device as the thermal source of preheating device, i.e. uses heat transfer apparatus to be used for by the heat of recovery
The thermal source of contaminated soil the pre-heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830066.2A CN106311733A (en) | 2016-09-19 | 2016-09-19 | Method for remediating soil by using thermal desorption and microbial technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830066.2A CN106311733A (en) | 2016-09-19 | 2016-09-19 | Method for remediating soil by using thermal desorption and microbial technology |
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| CN106311733A true CN106311733A (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610830066.2A Pending CN106311733A (en) | 2016-09-19 | 2016-09-19 | Method for remediating soil by using thermal desorption and microbial technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941187A (en) * | 2018-07-19 | 2018-12-07 | 珠海市万顺睿通科技有限公司 | A kind of abatement of pollution method of contaminated soil |
| CN109794501A (en) * | 2019-03-13 | 2019-05-24 | 上海市园林科学规划研究院 | A method of matching the raw-soil using petroleum hydrocarbon contaminated soil preparation |
| CN112453049A (en) * | 2020-11-08 | 2021-03-09 | 浙江和宸环保科技有限公司 | Environment-friendly soil remediation method |
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| US20030196789A1 (en) * | 2001-10-24 | 2003-10-23 | Wellington Scott Lee | In situ thermal processing of a hydrocarbon containing formation and upgrading of produced fluids prior to further treatment |
| CN102873087A (en) * | 2012-10-10 | 2013-01-16 | 北京中科通用能源环保有限责任公司 | Soil repairing system and soil repairing method |
| CN104056858A (en) * | 2014-06-24 | 2014-09-24 | 喻彬 | Soil restoration method |
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2016
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| US20030196789A1 (en) * | 2001-10-24 | 2003-10-23 | Wellington Scott Lee | In situ thermal processing of a hydrocarbon containing formation and upgrading of produced fluids prior to further treatment |
| CN102873087A (en) * | 2012-10-10 | 2013-01-16 | 北京中科通用能源环保有限责任公司 | Soil repairing system and soil repairing method |
| CN104056858A (en) * | 2014-06-24 | 2014-09-24 | 喻彬 | Soil restoration method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941187A (en) * | 2018-07-19 | 2018-12-07 | 珠海市万顺睿通科技有限公司 | A kind of abatement of pollution method of contaminated soil |
| CN108941187B (en) * | 2018-07-19 | 2020-10-23 | 洲际环境科学研究院(广州)有限公司 | Pollution eliminating method for polluted soil |
| CN109794501A (en) * | 2019-03-13 | 2019-05-24 | 上海市园林科学规划研究院 | A method of matching the raw-soil using petroleum hydrocarbon contaminated soil preparation |
| CN112453049A (en) * | 2020-11-08 | 2021-03-09 | 浙江和宸环保科技有限公司 | Environment-friendly soil remediation method |
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