CN102642879A - Method for treating landfill leachate and waste incineration fly ash simultaneously by adopting formulation and synergistic technology - Google Patents
Method for treating landfill leachate and waste incineration fly ash simultaneously by adopting formulation and synergistic technology Download PDFInfo
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Abstract
The invention discloses a method for treating landfill leachate and waste incineration fly ash simultaneously by adopting formulation and synergistic technology, which is substantially a stabilization method of the incineration fly ash. The method is characterized in that the landfill leachate is adopted, the city waste incineration fly ash is used as base materials, a monomer stabilizer is selected, formulation is performed, a composite stabilizer is prepared, and stabilization disposal is performed on the fly ash and the leachate; the proportion is 60-70wt% of the city waste incineration fly ash, 0.1-0.5wt% of the stabilizer and 30-40wt% of the landfill leachate; and the processing method includes: taking the formulated composite stabilizer to be evenly mixed with the fly ash, spraying in the landfill leachate, stirring evenly, forming a thick ash slurry mixture, maintaining for three days at normal temperature, and being embedded in a landfill after natural drying. The method can not only utilize and treat the city waste fly ash, but also can treat the harmful landfill leachate, and is an effective environmental protection measure which achieves two things at one stroke.
Description
Technical field
The present invention relates to WWT simultaneously and Hazardous wastes is innoxious, the stabilization treatment method, and the concentrated waste percolate after the reverse osmosis membrane processing that particularly relates to a kind of environmental protection is handled and the stabilization treatment of incineration of refuse flyash.
Background technology
Along with developing rapidly of industrial and agricultural production and improving constantly of living standards of the people; The generation of municipal wastes is also in continuous increase; At present; China's year discharging municipal wastes has reached more than 11,500,000,000 tons, but also constantly increases in the rate of increase with annual 8 %～10 %. and therefore, handling so how rationally, effectively, huge municipal wastes has become an environmental issue that needs to be resolved hurrily.China's municipal wastes adopts the method for landfill to handle mostly at present, adopts landfill method to handle municipal wastes and can produce a large amount of percolates.Landfill percolate has the Pollutant levels height, water quantity and quality changes the characteristics that wait greatly, does not also have cost-effective especially treatment process at present in the world.Membrane treatment process is very fast in the development of percolate process field, and with respect to other treatment process, the reverse osmosis membrane separation process can be carried out at normal temperatures; And there is not phase transformation; Less energy-consumption can be removed inorganic salt and organic molecule impurity effectively, has higher water reclamation rate; Can guarantee good treatment effect, at present domestic existing bulky refuse landfill yard adopts reverse osmosis process to handle percolate.But r-o-only is a sepn process, and the cycles of concentration of reverse osmosis process receives certain restriction, when r-o-is isolated clear water from percolate, also has one liquid concentrator that accounts for feed liquor amount 30% to need further to handle.The reverse osmosis concentrated liquid of percolate is a kind of organic liquid waste of high density, and its COD and conductivity value be 3 ~ 4 times of primary percolate often, even 5 times, therefore, still have the quite high liquid concentrator of a large amount of Pollutant levels to need properly to dispose.The processing of liquid concentrator mainly contains methods such as burning, curing, distillation is dry and recharge, but this type of processing exists serious problems such as power consumption is big, energy wastage.Therefore along with the reverse osmosis process further application of landfill yard at home, the treatment process of research reverse osmosis concentrated liquid is very necessary.
In addition, be the contradiction between the landfill yard capacity of the sustainable growth of alleviating domestic waste output and growing tension, all parts of the country are all at positive construction garbage burning factory.Burning can make waste reduction about 90%; But can produce the incineration residue of some amount in the burning process; Different according to rubbish composition and incineration temperature, time; And the difference of Pollution abatement measure, the amount of residue accounts for about 25% of the preceding total mass of waste incineration, and wherein flying ash accounts for about 4%.Expect 2010, China only flying dust of burning city domestic garbage generation just will reach 520,000 t.The heavy metal such as lead, good fortune that contains higher concentration in the flying ash; And organism such as trace level dioxin; " Hazardous wastes pollution prevention technique policy " (State Environmental Protection Administration; 2001) clearly classify flying ash as Hazardous wastes in, environment is had potential hazardness, must deal carefully with.
Summary of the invention
The method that the purpose of this invention is to provide compound synergic technology while treating refuse percolate and incineration of refuse flyash; Realize the common processing of percolate and flying dust, this method cost is low, and treatment effect is stable; Can not cause secondary pollution to environment, concrete technical scheme is following.
The method of compound synergic technology while treating refuse percolate and incineration of refuse flyash comprises the steps:
(1) selects monomer stablizer and carry out compositely, be prepared into one package stabilizer;
(2) with one package stabilizer and incineration of refuse flyash uniform mixing;
(3) percolate is joined in the mixture of flying dust and one package stabilizer, continue to stir, make heavy metal and stablizer and percolate complete reaction in the flying dust, form thick shape mortar mix;
(4) then with the dry back security landfill under the natural ventilation condition of said thick shape mortar mix.
As the technical scheme of further optimization, one package stabilizer comprises organic monomer stablizer and inorganic monomer stablizer described in the step (1).
As the technical scheme of further optimization, one package stabilizer described in the step (1) comprises EDTA disodium, organic phosphoric acid hydroxy ethylene diphosphonic acid (HEDP), phosphoric acid salt (NaH
2PO
4), two or more in Sulfothiorine, sodium sulphite, sodium sulfate and the nabam.
As the technical scheme of further optimization, the weight ratio of incineration of refuse flyash and one package stabilizer is 100:0.1 ~ 100:0.5 in the step (1).
Technical scheme as further optimization; The percolate of step (3) is sprayed onto in the mixture of flying dust and one package stabilizer; Percolate is 0.3 ~ 0.7:1 (ml/g) with the volume mass ratio of incineration of refuse flyash, and percolate adds the back and continues to stir 15 ~ 30min.
As the technical scheme of further optimization, step (4) was with said thick shape mortar mix under the natural ventilation condition dry 3 ~ 6 days.
In the above-mentioned compound synergic technology while treating refuse percolate and the method for incineration of refuse flyash, said rubbish can be domestic refuse.
With respect to prior art, the present invention has following advantage:
The invention provides the method for utilizing compounded technology while treating refuse percolate and flying ash, realized the stabilization landfill up to standard of percolate and zero release and flying ash.The stablizer of the present invention's preparation is cheap, is easy to get.The present invention utilizes the pollutent and the agent of stable composition chemical drug such as phosphoric acid salt, sulfide and humic acids of percolate middle and high concentration simultaneously; React with heavy metal ion in the flying dust and to form stable complex compound; At one package stabilizer: percolate: Gu the solid-liquid of incineration of refuse flyash-than being under the condition of 0.1 ~ 0.5:30 ~ 70:100 (g/ml/g); The leaching toxicity of fly-ash heavy metal satisfies " Hazardous wastes judging standard-leaching toxicity is differentiated " requirement (GB5085.3-2007) after the stabilization treatment, and the flying dust after the stabilization satisfies " household refuse landfill sites pollution control criterion " standard of landfill (GB16889-2008) simultaneously.The heavy metal leaching toxicity test shows, is under 12 ~ 13 the condition at pH, with former gray scale, the fly-ash heavy metal Pb after the stabilization treatment; Cd, Cu, Zn, Cr; The leaching amount of Ni has all descended more than 90%, satisfies the Hazardous wastes standard of perfection, thereby has reduced the flying ash risk of contaminate environment once more; In addition, realized the zero release of percolate, can not work the mischief environment.
The method of utilizing compounded technology while treating refuse percolate and flying ash that the present invention proposes; Working method is convenient; Processing costs is low, and after the stabilized processing, the leaching concentration of flying dust is lower than " household refuse landfill sites pollution control criterion " standard of landfill (GB16889-2008); Can directly send landfill yard to dispose, and percolate has been realized zero release.
Description of drawings
Fig. 1 is for adopting the method flow sketch of compounded technology while treating refuse percolate and flying ash.
Embodiment
Below through embodiment the present invention is described further.But the scope that the present invention requires to protect is the scope represented in embodiment of limitation not.
Adopt China's " solid waste leaches the horizontal succusion of toxicity leaching method " (HJ557-2009) the leaching toxicity of flying dust to be differentiated; The content of Cu, Zn, Pb, Cd, Cr and Ni is used the atomic absorption flame sectional light absorbance technique determining in the flying dust leach liquor, and the result sees table 1.
The leaching toxicity test result (mg/L) of table 1 incineration of refuse flyash leach liquor
| Project | Measured value | Threshold limit value | ? |
| pH | 12.36 | ? | ? |
| Cu | 5.4 | 100 | ? |
| Zn | 170.4 | 100 | ? |
| Pb | 205 | 5 | ? |
| Cd | 2.8 | 1 | ? |
| Cr | 38.4 | 15 | ? |
| Ni | 0.4 | 5 | ? |
Table 2 percolate specificity analysis
| Project | Measured value |
| pH | 7.86 |
| COD（mg/L） | 3210 |
| Humic acids (mg/L) | 1428 |
| Cu | 0.51 |
| Zn | 1.5 |
| Pb | <0.5 |
| Cd | 0.03 |
| Cr | 2.6 |
| Ni | 1 |
The method flow of following examples can be with reference to figure 1.
Embodiment 1:
Get flying ash 100g, add 0.1 g one package stabilizer (organic phosphoric acid hydroxy ethylene diphosphonic acid (HEDP), phosphoric acid salt (NaH
2PO
4), the mol ratio of Sulfothiorine is 0.5:5:2), after stirring, evenly spray 50ml liquid concentrator percolate, make flying ash soak into liquid concentrator fully, form thick shape mortar.Under the natural air drying condition, left standstill 3 days dry back security landfill then.According to China's " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007); Flying dust after the stabilization (HJ557-2009) is carried out leaching toxicity test by " solid waste leaches the horizontal succusion of toxicity leaching method "; It is 5.8 mg/L that the element Zn that exceeds standard leaches concentration, and it is 2.6 mg/L that Pb leaches concentration, and it is 0.21 mg/L that Cd leaches concentration; It is 1.25 mg/L that Cr leaches concentration, satisfies Hazardous wastes judging standard and Hazardous wastes standard of landfill.In addition, in the leach liquor, COD is 66 mg/L, and humic acids concentration is 4.8 mg/L.Reached liquid concentrator zero release purpose.
Embodiment 2:
Get flying ash 100g; Add 0.5 g one package stabilizer (EDTA disodium, organic phosphoric acid hydroxy ethylene diphosphonic acid (HEDP), sodium sulphite and nabam mol ratio are 0.1:0.5:2.5:1); After stirring; Evenly spray 30ml liquid concentrator percolate, make flying ash soak into liquid concentrator fully, form thick shape mortar.Under the natural air drying condition, left standstill 3 days dry back security landfill then.According to China's " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007); Flying dust after the stabilization (HJ557-2009) is carried out leaching toxicity test by " solid waste leaches the horizontal succusion of toxicity leaching method "; It is 3.6 mg/L that the element Zn that exceeds standard leaches concentration, and it is 1.25 mg/L that Pb leaches concentration, and it is 0.28 mg/L that Cd leaches concentration; It is 0.94 mg/L that Cr leaches concentration, satisfies Hazardous wastes judging standard and Hazardous wastes standard of landfill.In addition, in the leach liquor, COD is 46 mg/L, and humic acids concentration is 2.45 mg/L.Reached liquid concentrator zero release purpose.
Embodiment 3:
Get flying ash 100g, add 0.2 g one package stabilizer (organic phosphoric acid hydroxy ethylene diphosphonic acid (HEDP), phosphoric acid salt (NaH
2PO
4), the nabam mol ratio is 0.5:2.0:1), after stirring, evenly spray 50ml liquid concentrator percolate, make flying ash soak into liquid concentrator fully, form thick shape mortar.Under the natural air drying condition, left standstill 6 days dry back security landfill then.According to China's " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007); Flying dust after the stabilization (HJ557-2009) is carried out leaching toxicity test by " solid waste leaches the horizontal succusion of toxicity leaching method "; It is 4.7 mg/L that the element Zn that exceeds standard leaches concentration, and it is 2.21 mg/L that Pb leaches concentration, and it is 0.29 mg/L that Cd leaches concentration; It is 1.05 mg/L that Cr leaches concentration, satisfies Hazardous wastes judging standard and Hazardous wastes standard of landfill.In addition, in the leach liquor, COD is 60 mg/L, and humic acids concentration is 4.6 mg/L.Reached liquid concentrator zero release purpose.
Embodiment 4:
Get flying ash 100g, add 0.3 g one package stabilizer (phosphoric acid salt (NaH2PO4) and Sulfothiorine mol ratio are 2:1), after stirring, evenly spray 70ml liquid concentrator percolate, make flying ash soak into liquid concentrator fully, form thick shape mortar.Under the natural air drying condition, left standstill 4 days dry back security landfill then.According to China's " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007); Flying dust after the stabilization (HJ557-2009) is carried out leaching toxicity test by " solid waste leaches the horizontal succusion of toxicity leaching method "; It is 5.1 mg/L that the element Zn that exceeds standard leaches concentration, and it is 2.18 mg/L that Pb leaches concentration, and it is 0.16 mg/L that Cd leaches concentration; It is 1.01 mg/L that Cr leaches concentration, satisfies Hazardous wastes judging standard and Hazardous wastes standard of landfill.In addition, in the leach liquor, COD is 75mg/L, and humic acids concentration is 5.2 mg/L.Reached liquid concentrator zero release purpose.
Embodiment 5:
Get flying ash 100g, add 0.5 g one package stabilizer (EDTA disodium, Sulfothiorine mol ratio are 1:5), after stirring, evenly spray 70ml liquid concentrator percolate, make flying ash soak into liquid concentrator fully, form thick shape mortar.Under the natural air drying condition, left standstill 3 days dry back security landfill then.According to China's " the Hazardous wastes judging standard leaches toxicity and differentiates " (GB5085.3-2007); Flying dust after the stabilization (HJ557-2009) is carried out leaching toxicity test by " solid waste leaches the horizontal succusion of toxicity leaching method "; It is 3.8 mg/L that the element Zn that exceeds standard leaches concentration, and it is 1.42 mg/L that Pb leaches concentration, and it is 0.11 mg/L that Cd leaches concentration; It is 0.84 mg/L that Cr leaches concentration, satisfies Hazardous wastes judging standard and Hazardous wastes standard of landfill.In addition, in the leach liquor, COD is 64 mg/L, and humic acids concentration is 5.0 mg/L.Reached liquid concentrator zero release purpose.
The use percolate that the present invention proposes is the method for flying ash fixedly, and flying dust leaches toxicity and satisfies " household refuse landfill sites pollution control criterion " (GB16889-2008), and percolate has also reached the purpose of zero release simultaneously.
Claims (7)
1. the method for compound synergic technology while treating refuse percolate and incineration of refuse flyash is characterized in that comprising the steps:
(1) selects monomer stablizer and carry out compositely, be prepared into one package stabilizer;
(2) with one package stabilizer and incineration of refuse flyash uniform mixing;
(3) percolate is joined in the mixture of flying dust and one package stabilizer, continue to stir, make heavy metal and stablizer and percolate complete reaction in the flying dust, form thick shape mortar mix;
(4) then with the dry back security landfill under the natural ventilation condition of said thick shape mortar mix.
2. the method for compound synergic technology while treating refuse percolate according to claim 1 and incineration of refuse flyash, it is characterized in that: one package stabilizer comprises organic monomer stablizer and inorganic monomer stablizer described in the step (1).
3. compound synergic according to claim 2 technology is the method for treating refuse percolate and incineration of refuse flyash simultaneously, it is characterized in that: one package stabilizer described in the step (1) comprises two or more in EDTA disodium, organic phosphoric acid hydroxy ethylene diphosphonic acid, phosphoric acid salt, Sulfothiorine, sodium sulphite, sodium sulfate and the nabam.
4. the method for compound synergic technology while treating refuse percolate according to claim 1 and incineration of refuse flyash, it is characterized in that: the weight ratio of incineration of refuse flyash and one package stabilizer is 100:0.1 ~ 100:0.5 in the step (1).
5. the method for compound synergic technology while treating refuse percolate according to claim 1 and incineration of refuse flyash; It is characterized in that: the percolate of step (3) is sprayed onto in the mixture of flying dust and one package stabilizer; Percolate is 0.3 ~ 0.7:1 (ml/g) with the volume mass ratio of incineration of refuse flyash, and percolate adds the back and continues to stir 15 ~ 30min.
6. compound synergic according to claim 1 technology is the method for treating refuse percolate and incineration of refuse flyash simultaneously, it is characterized in that: step (4) is with said thick shape mortar mix drying 3 ~ 6 days under the natural ventilation condition.
7. according to the method for each described compound synergic technology while treating refuse percolate of claim 1 ~ 6 and incineration of refuse flyash, it is characterized in that: said rubbish is domestic refuse.
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| CN104084415A (en) * | 2014-07-02 | 2014-10-08 | 天津壹鸣环境工程有限公司 | Technology for reducing waste incineration fly ash via water logging pretreatment |
| CN106217925A (en) * | 2016-08-02 | 2016-12-14 | 天津泰达环保有限公司 | A kind of method of pretreatment before incineration of refuse flyash is melted |
| CN107596613A (en) * | 2017-08-09 | 2018-01-19 | 河海大学 | A kind of method of heavy metal ion in stabilization, solidification flying ash |
| CN108379765A (en) * | 2018-03-06 | 2018-08-10 | 成都恒鑫和环保科技有限公司 | A kind of heavy metal chelant and preparation method thereof |
| CN108500030A (en) * | 2018-02-23 | 2018-09-07 | 河南师范大学 | A kind of Na2The method that EDTA couples heavy metal in Zero-valent Iron removal medical refuse burning flyash |
| CN108706802A (en) * | 2018-04-25 | 2018-10-26 | 中广核研究院有限公司 | The processing method and its processing system for the pollutant that consumer waste incineration generates |
| CN108744383A (en) * | 2018-08-06 | 2018-11-06 | 成都市兴蓉再生能源有限公司 | A kind of compound incineration of refuse flyash chelating agent and preparation method thereof |
| CN108980853A (en) * | 2018-09-12 | 2018-12-11 | 中国环境科学研究院 | Incineration of refuse flyash and percolate cooperative processing method and device |
| CN109047295A (en) * | 2018-09-12 | 2018-12-21 | 中国环境科学研究院 | The processing method and processing device of landfill leachate leaching flying ash |
| CN109622560A (en) * | 2018-12-04 | 2019-04-16 | 合肥全晟环保科技有限公司 | The processing method of incineration of refuse flyash |
| CN109719110A (en) * | 2017-10-27 | 2019-05-07 | 永清环保股份有限公司 | A method of processing incineration of refuse flyash |
| CN109821863A (en) * | 2019-03-28 | 2019-05-31 | 北京科技大学 | A kind of method of percolate and flying ash cooperative disposal |
| CN111265810A (en) * | 2019-09-20 | 2020-06-12 | 连云港新江环保材料有限公司 | Efficient fly ash chelating agent and preparation method thereof |
| CN111318544A (en) * | 2018-12-14 | 2020-06-23 | 湖南军信环保股份有限公司 | Method for cooperatively treating concentrated solution and household garbage incineration fly ash |
| CN112718788A (en) * | 2020-12-08 | 2021-04-30 | 中节能（连云港）清洁技术发展有限公司 | Landfill pretreatment method for acidic waste salt containing organic matters |
| CN113024051A (en) * | 2019-12-24 | 2021-06-25 | 湖南军信环保股份有限公司 | Targeting chelating agent and method for treating refuse leachate membrane filtration concentrated solution salt slurry |
| CN114618114A (en) * | 2022-04-15 | 2022-06-14 | 安徽理工大学 | Method for stabilizing heavy metals in waste incineration fly ash based on landfill leachate |
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| CN104084415A (en) * | 2014-07-02 | 2014-10-08 | 天津壹鸣环境工程有限公司 | Technology for reducing waste incineration fly ash via water logging pretreatment |
| CN106217925A (en) * | 2016-08-02 | 2016-12-14 | 天津泰达环保有限公司 | A kind of method of pretreatment before incineration of refuse flyash is melted |
| CN107596613A (en) * | 2017-08-09 | 2018-01-19 | 河海大学 | A kind of method of heavy metal ion in stabilization, solidification flying ash |
| CN109719110A (en) * | 2017-10-27 | 2019-05-07 | 永清环保股份有限公司 | A method of processing incineration of refuse flyash |
| CN108500030A (en) * | 2018-02-23 | 2018-09-07 | 河南师范大学 | A kind of Na2The method that EDTA couples heavy metal in Zero-valent Iron removal medical refuse burning flyash |
| CN108379765A (en) * | 2018-03-06 | 2018-08-10 | 成都恒鑫和环保科技有限公司 | A kind of heavy metal chelant and preparation method thereof |
| CN108706802A (en) * | 2018-04-25 | 2018-10-26 | 中广核研究院有限公司 | The processing method and its processing system for the pollutant that consumer waste incineration generates |
| CN108744383A (en) * | 2018-08-06 | 2018-11-06 | 成都市兴蓉再生能源有限公司 | A kind of compound incineration of refuse flyash chelating agent and preparation method thereof |
| CN109047295A (en) * | 2018-09-12 | 2018-12-21 | 中国环境科学研究院 | The processing method and processing device of landfill leachate leaching flying ash |
| CN108980853A (en) * | 2018-09-12 | 2018-12-11 | 中国环境科学研究院 | Incineration of refuse flyash and percolate cooperative processing method and device |
| CN109622560A (en) * | 2018-12-04 | 2019-04-16 | 合肥全晟环保科技有限公司 | The processing method of incineration of refuse flyash |
| CN111318544A (en) * | 2018-12-14 | 2020-06-23 | 湖南军信环保股份有限公司 | Method for cooperatively treating concentrated solution and household garbage incineration fly ash |
| CN109821863A (en) * | 2019-03-28 | 2019-05-31 | 北京科技大学 | A kind of method of percolate and flying ash cooperative disposal |
| CN109821863B (en) * | 2019-03-28 | 2021-04-06 | 北京科技大学 | Method for cooperative treatment of leachate and incineration fly ash |
| CN111265810A (en) * | 2019-09-20 | 2020-06-12 | 连云港新江环保材料有限公司 | Efficient fly ash chelating agent and preparation method thereof |
| CN113024051A (en) * | 2019-12-24 | 2021-06-25 | 湖南军信环保股份有限公司 | Targeting chelating agent and method for treating refuse leachate membrane filtration concentrated solution salt slurry |
| CN112718788A (en) * | 2020-12-08 | 2021-04-30 | 中节能（连云港）清洁技术发展有限公司 | Landfill pretreatment method for acidic waste salt containing organic matters |
| CN114618114A (en) * | 2022-04-15 | 2022-06-14 | 安徽理工大学 | Method for stabilizing heavy metals in waste incineration fly ash based on landfill leachate |
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Application publication date: 20120822 |