CN103878172A - Method for jointly treating polycyclic aromatic hydrocarbon polluted soil and urban organic waste - Google Patents
Method for jointly treating polycyclic aromatic hydrocarbon polluted soil and urban organic waste Download PDFInfo
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- CN103878172A CN103878172A CN201410147551.0A CN201410147551A CN103878172A CN 103878172 A CN103878172 A CN 103878172A CN 201410147551 A CN201410147551 A CN 201410147551A CN 103878172 A CN103878172 A CN 103878172A
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- organic waste
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- aromatic hydrocarbons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention discloses a method for jointly treating polycyclic aromatic hydrocarbon polluted soil and urban organic waste. The method comprises the following steps of mixing, stacking and fermenting domestic garbage, sludge, kitchen waste, poultry manure, polycyclic aromatic hydrocarbon polluted soil, straw, rice shell, wooden chippings, bark, sugarcane residues and mushroom residues; adding an additive consisting of diatomite, active carbon, FeCl3 and magnesia mixture in the mixing and stacking process of the organic waste, the polycyclic aromatic polluted soil and the waste biomass. By adopting the method, the soil and organ organic solid waste can be simultaneously treated, so that the independent treatment cost can be greatly reduced. Materials are convenient to acquire, the method is simple, effective and rapid, the treated soil can be directly used for the agricultural planting after the organic fertilizer or other additive is directly added, the polycyclic aromatic hydrocarbon polluted soil is treated, a great amount of domestic garbage, sludge, kitchen waste and livestock manure in the city also an be treated, and the land occupied by the urban garbage treatment can be greatly reduced.
Description
Technical field
The present invention relates to solid waste recycling field, the particularly a kind of method of polycyclic aromatic hydrocarbons contaminated soil and city organic waste Combined Treatment is one for multiring aromatic hydrocarbon organic polluted soil and rubbish from cooking,
The organic solid waste Combined Treatment technology such as mud, changing food waste, feces of livestock and poultry.
Background technology
Soil is the material base that the mankind depend on for existence, is the important component part of human ecological environment.Along with the development of industrial or agricultural and the expansion of urbanization process, in agricultural, in being widely used of fertilizer and pesticide, industrial wastewater, poisonous and harmful substance invasion and attack farmland, solid waste are stacked the leakage etc. of the poisonous and harmful substance that landfill causes, make various polluters by different approaches constantly accumulation in soil, purification capacity of soil day hastens towards saturation, soil quality obviously declines, and China's soil pollution situation has started Sustainable Use of Soil Resources and agricultural product ecological safety to constitute a threat to.According to statistics, the farmland that the whole nation is polluted by organic pollution (agricultural chemicals, petroleum hydrocarbon and PAHs) reaches 3.6 × 10
7hm
2, these contaminated sites show that type is many, pollution sources are complicated, endanger the features such as wide, and the grain that lose because of soil pollution every year in the whole nation reaches 1.2 × 10
10kg.Soil pollution not only causes quality of agricultural product to decline, and is detrimental to health, and also causes atmosphere and water body environment pollution.Soil pollution has typical time bomb character, once large area outburst, will cause impact difficult to the appraisal to national sustainable development, therefore, how rationally disposing contaminated soil becomes current urgent problem, carries out the research of contaminated soil disposal technology very urgent.The recovery technique research of contaminated soil is becoming the emphasis of countries in the world research, with
Yang Yeshi China is in important topic and the research direction of field of Environment Protection.
Multiring aromatic hydrocarbon organic pollution in soil, as the special soil pollutant of a class, has its polluting property that is different from other pollutants, and because of its complicated component and harmfulness, is listed in the toxic pollutant that potentially danger in environment is large, should preferentially control.Therefore, external many developed countries expressly provide, to being subject to
Multiring aromatic hydrocarbon contaminated soil must be carried out appropriate disposal, to guarantee the safety of biology and environment thereof.
The domestic at present treatment technology of organic contamination soil being mainly contained: hot analytic technique, high-level oxidation technology and biological extracting, biological restoration etc.Soil after biological restoration can continue agricultural, the soil after the technical finesses such as hot analytic technique, advanced oxidation all needs to add can agricultural profit after fertilizer or other additives
With.Therefore, lack the method for more effectively administering.
Summary of the invention
The object of the present invention is to provide a kind of method of polycyclic aromatic hydrocarbons contaminated soil and city organic waste Combined Treatment, the present invention is directed to multiring aromatic hydrocarbon organic polluted soil, adopt the mode of Polluted Soil and organic waste Combined Treatment, process in position soil, soil after treatment can be directly used in agricultural planting etc.
To achieve these goals, technical scheme of the present invention is:
A method for polycyclic aromatic hydrocarbons contaminated soil and city organic waste Combined Treatment, is included under the condition that environment temperature is not less than subzero 10 degrees Celsius organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass is carried out to mixed-stacking fermentation; Wherein, in carrying out the process of mixed-stacking, described organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass add by diatomite, active carbon, FeCl
3and the additive of magnesia compositions of mixtures, the ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 40～50
Polycyclic aromatic hydrocarbons contaminated soil: 25～40
Abandoned biomass: 5～10
Additive: 5～30
Wherein: described organic waste comprises: rubbish from cooking, mud, changing food waste, feces of livestock and poultry or combination; Described abandoned biomass comprises: stalk, rice husk, wood chip, bark, bagasse and mushroom residue or combination.
Method is further: described diatomite, active carbon, FeCl
3and the quality proportioning of magnesia is 2:4:1:1.
Method is further: the moisture control after described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive mixed-stacking is being between 55%-60%.
Method is further: described accumulation is to pile up under the formula condition of the storehouse of unlimited slot type or sealing, and the width of described groove is 5～6m, and the height of groove is 2.0～2.5m; The width in described storehouse is 9～10m, and the height in storehouse is 2.5～3.0m; Described accumulation adopts trapezoidal buttress mode to pile up, and the width of trapezoidal buttress is 4～6m, is highly 1.5～2.0m.
Method is further: the process of described fermentation is: by trapezoidal the buttress turning in every 3 to 7 days after piling up once, after 3 weeks, stop turning, maintenance at least 5 days after temperature rises to more than 55 degree in buttress, fermentation ends.
The present invention compared with prior art tool has the following advantages: can process soil and city organic solid waste simultaneously, greatly reduce the cost of processing separately.Material obtains convenience, method is simple, effective, quick, soil after treatment need not add fertilizer or other additives just can be directly used in agricultural planting, in processing in polycyclic aromatic hydrocarbons contaminated soil also to city, a large amount of rubbish from cooking, mud, changing food waste, feces of livestock and poultry processed, and greatly reduced the occupation of land of these treatments of urban garbage.
Below in conjunction with embodiment, the present invention is described in detail.
The specific embodiment
A kind of method of polycyclic aromatic hydrocarbons contaminated soil and city organic waste Combined Treatment: described method is included under the condition that environment temperature is not less than subzero 10 degrees Celsius carries out mixed-stacking fermentation by organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass; Wherein, in carrying out the process of mixed-stacking, described organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass add by diatomite, active carbon, FeCl
3and the additive of magnesia compositions of mixtures, the ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 40～50
Polycyclic aromatic hydrocarbons contaminated soil: 25～40
Abandoned biomass: 5～10
Additive: 5～30
Wherein: described organic waste comprises: rubbish from cooking, mud, changing food waste, feces of livestock and poultry or combination; Described abandoned biomass comprises: stalk, rice husk, wood chip, bark, bagasse and mushroom residue or combination.
In embodiment: described diatomite, active carbon, FeCl
3and the quality proportioning of magnesia (weight fraction ratio) is 2:4:1:1, the Main Function of additive is the stink of removing in composting process, wherein: the effect of diatomite, active carbon is the foul smell volatilizing in absorption composting process, FeCl
3and the effect of magnesia be with material in ammonia generate guanite crystal.
In embodiment: the moisture control after described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive mixed-stacking is being between 55%-60%.
In embodiment: described accumulation is to pile up under the formula condition of the storehouse of unlimited slot type or sealing, and the width of described groove is 5～6m, and the height of groove is 2.0～2.5m; The width in described storehouse is 9～10m, and the height in storehouse is 2.5～3.0m; Described accumulation adopts trapezoidal buttress mode to pile up, and the width of trapezoidal buttress is 4～6m, is highly 1.5～2.0m.
In embodiment: the process of described fermentation is: by trapezoidal the buttress turning in every 3 to 7 days after piling up once, after 3 weeks, stop turning, after in buttress, temperature rises to more than 55 degree, keep at least 5 days, fermentation ends, remains on temperature between 55 degrees Celsius to 70 degrees Celsius conventionally.
Said method has adopted bar buttress formula compost, slot type compost or storehouse formula compost, the organic solid wastes such as polycyclic aromatic hydrocarbon organic contamination soil and rubbish from cooking, mud, changing food waste, feces of livestock and poultry are mixed according to different proportion, as degraded and the in-situ treatment mode of polycyclic aromatic hydrocarbon organic contamination soil, gained contaminated soil after treatment can directly use as agricultural planting soil, can process soil and city organic solid waste simultaneously, greatly reduce the cost of processing separately.
In this method banking process, be destitute of smell and distribute; Pile up multiring aromatic hydrocarbon organic pollution in last finished product and obtained decomposition as the carbon source of compost microbe; Conventionally banking up after surrounding, the degrading polycyclic aromatic hydrocarbons rate of soil reaches national Soil standard; Product directly Planting Crops or can be used as soil conditioner use.
Below the embodiment of several reality.
Embodiment 1:
The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10
That is: get the mud that the moisture content of 500Kg is 80%, mix agricultural stalk 100Kg, that particle diameter is 10cm, sending into mixer together with removing the polycyclic aromatic hydrocarbons contaminated soil of 300Kg after foreign material and the additive of 100Kg fully mixes, stir after 10 minutes, heap is set to wide 6m, the bar buttress of high 1.5m, heap postpone turning in every 4 days once, after 3 weeks, stop turning, temperature in heap is controlled between 55 degree to 65 degree, banks up after surrounding, and the polycyclic aromatic hydrocarbon in soil is reduced to 0.02mg/kg, soil is as planting soil, directly Planting Crops.
Embodiment 2:
The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 45
Polycyclic aromatic hydrocarbons contaminated soil: 20
Abandoned biomass: 10
Additive: 20.
That is: get the rubbish from cooking that the moisture content of 450Kg is 70%, mix mushroom residue 100Kg, that particle diameter is 6cm, send into mixer with the polycyclic aromatic hydrocarbons contaminated soil of the 200Kg after impurity elimination thing and 200Kg additive and fully mix, stir after 10 minutes, send into into wide 5m, the slot type in-vessel composting system of high 2.0m, heap postpone turning in every 6 days once, stops turning after 3 weeks, temperature in heap is between 55 degree to 65 degree, bank up after surrounding, the polycyclic aromatic hydrocarbon in soil is reduced to 0.01mg/kg, directly Planting Crops.
Embodiment 3:
The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 45
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 15
Additive: 10.
That is: get the feces of livestock and poultry that the moisture content of 450Kg is 60%, mix wood chip 150Kg, that particle diameter is 8cm, with remove after building waste, large part foreign material, the polycyclic aromatic hydrocarbons contaminated soil of 300Kg and the additive of 100Kg, sending into mixer fully mixes, stir after 10 minutes, send into in-vessel composting system, heap is set to wide 10m, the heap body of high 2.5m, heap postpone turning in every 5 days once, stops turning after 3 weeks, temperature in heap is between 55 degree to 65 degree, bank up after surrounding, the polycyclic aromatic hydrocarbon in soil is reduced to 0.005mg/kg, directly Planting Crops.
Embodiment 4:
The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50, wherein: mud 30, rubbish from cooking 20
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10.
That is: get the mud that the moisture content of 300Kg is 80%, the rubbish from cooking that the moisture content of getting 200Kg is 70%, mix agricultural stalk 100Kg, that particle diameter is 10cm and the additive of 100Kg, sending into mixer with polycyclic aromatic hydrocarbons contaminated soil after removal building waste, large part foreign material, 300Kg fully mixes, stir after 10 minutes, heap is set to wide 6m, the bar buttress of high 2m, the every 6d turning of heap postpone once, stops turning after 3 weeks.Bank up after surrounding, the temperature in heap is between 55 degree to 65 degree, and the polycyclic aromatic hydrocarbon in soil is reduced to 0.02mg/kg, and the soil improvement after analysing as pyrolysis is used.
Embodiment 5:
The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10.
That is: get the changing food waste that the moisture content of 500Kg is 80%, mix the agricultural stalk that 100Kg particle diameter is 10cm, sending into mixer together with the polycyclic aromatic hydrocarbons contaminated soil of 300Kg and the additive of 100Kg fully mixes, stir after 10 minutes, heap is set to wide 6m, the bar buttress of high 1.5m, the every 7d turning of heap postpone once, stops turning after 3 weeks.Temperature in heap, between 55 degree to 65 degree, is banked up after surrounding, and the polycyclic aromatic hydrocarbon in soil is reduced to 0.03mg/kg, and the soil improvement after analysing as pyrolysis is used.
Claims (10)
1. a method for polycyclic aromatic hydrocarbons contaminated soil and city organic waste Combined Treatment, is included under the condition that environment temperature is not less than subzero 10 degrees Celsius organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass is carried out to mixed-stacking fermentation; It is characterized in that, in described organic waste, polycyclic aromatic hydrocarbons contaminated soil and abandoned biomass carry out the process of mixed-stacking, add by diatomite, active carbon, FeCl
3and the additive of magnesia compositions of mixtures, the ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 40～50
Polycyclic aromatic hydrocarbons contaminated soil: 25～40
Abandoned biomass: 5～10
Additive: 5～30
Wherein: described organic waste comprises: rubbish from cooking, mud, changing food waste, feces of livestock and poultry or combination; Described abandoned biomass comprises: stalk, rice husk, wood chip, bark, bagasse and mushroom residue or combination.
2. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 1 and city organic waste Combined Treatment, is characterized in that described diatomite, active carbon, FeCl
3and the quality proportioning of magnesia is 2:4:1:1.
3. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 1 and 2 and city organic waste Combined Treatment, it is characterized in that, the moisture control after described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive mixed-stacking is being between 55%-60%.
4. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 3 and city organic waste Combined Treatment, it is characterized in that, described accumulation is to pile up under the formula condition of the storehouse of unlimited slot type or sealing, and the width of described groove is 5～6m, and the height of groove is 2.0～2.5m; The width in described storehouse is 9～10m, and the height in storehouse is 2.5～3.0m; Described accumulation adopts trapezoidal buttress mode to pile up, and the width of trapezoidal buttress is 4～6m, is highly 1.5～2.0m.
5. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 4 and city organic waste Combined Treatment, it is characterized in that, the process of described fermentation is: by trapezoidal the buttress turning in every 3 to 7 days after piling up once, after 3 weeks, stop turning, after temperature rises to more than 55 degree in buttress, keep at least 5 days fermentation ends.
6. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 2 and city organic waste Combined Treatment, is characterized in that, described organic waste is that moisture content is that 80% mud, abandoned biomass are that particle diameter is the agricultural stalk of 10cm; The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10.
7. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 2 and city organic waste Combined Treatment, is characterized in that, described organic waste is that moisture content is that 70% rubbish from cooking, abandoned biomass are that particle diameter is the mushroom residue of 6cm; The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 45
Polycyclic aromatic hydrocarbons contaminated soil: 20
Abandoned biomass: 10
Additive: 20.
8. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 2 and city organic waste Combined Treatment, is characterized in that, described organic waste is that moisture content is that 60% feces of livestock and poultry, abandoned biomass are that particle diameter is the wood chip of 8cm; The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 45
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 15
Additive: 10.
9. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 2 and city organic waste Combined Treatment, it is characterized in that, described organic waste is that moisture content is that 80% mud and 70% rubbish from cooking mixture, abandoned biomass are that particle diameter is the agricultural stalk of 10cm; The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50, wherein: mud 30, rubbish from cooking 20
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10.
10. the method for a kind of polycyclic aromatic hydrocarbons contaminated soil according to claim 2 and city organic waste Combined Treatment, is characterized in that, described organic waste is that moisture content is that 80% changing food waste, abandoned biomass are that particle diameter is the agricultural stalk of 10cm; The ratio of weight and number of described organic waste, polycyclic aromatic hydrocarbons contaminated soil, abandoned biomass and additive is:
Organic waste: 50
Polycyclic aromatic hydrocarbons contaminated soil: 30
Abandoned biomass: 10
Additive: 10.
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