CN103739158A - Method for treating early-stage landfill leachate - Google Patents
Method for treating early-stage landfill leachate Download PDFInfo
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- CN103739158A CN103739158A CN201310720198.6A CN201310720198A CN103739158A CN 103739158 A CN103739158 A CN 103739158A CN 201310720198 A CN201310720198 A CN 201310720198A CN 103739158 A CN103739158 A CN 103739158A
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Abstract
The invention relates to a method for treating early-stage landfill leachate. The method comprises the following steps: collecting early-stage landfill leachate through a regulating reservoir, transferring the leachate to a complete mixing anaerobic reactor through a pump for anaerobic reaction, subsequently transferring to an integrated denitrification reactor for denitrification reaction, subsequently transferring to an integrated iron-carbon Fenton reactor for Fenton reaction, subsequently transferring to a coagulating sedimentation device for coagulating sedimentation, subsequently transferring to an activated sludge reactor for activated sludge treatment, subsequently transferring to a filter tank for filtering, subsequently transferring to a disinfecting tank for disinfecting, and finally discharging the solution which meets the national discharge standards into municipal living sewage pipelines. The environment is effectively protected.
Description
[technical field]
The present invention relates to a kind for the treatment of process of early stage percolate.
[background technology]
Early stage percolate is the sewage oozing out from newly-built refuse landfill, because it has dissolved the many materials in component of refuse, thereby make the composition complex of percolate, principal pollutant comprise that large amount of organic is as organic hydrocarbons and their derivates, sour lipid, heavy metal, nitrogen salt etc., COD is high for its characteristic organic pollutants index, its scope is 5000-10000mg/L, total nitrogen is high, its scope is: 800-1000mg/L, ammonia nitrogen is low, Yan Se ?, smell special smell, if without harmless treatment, by severe contamination environment and water system around.Up to now, the method for the domestic relatively ripe treating refuse percolate with studying mainly contains biological treatment and chemical method, and biochemical process comprises anaerobism, aerobic treatment, AB method (being adsorption-flocculation, bio-oxidation double diffusion), bio-oxidation pond etc.Chemical method mainly contains Ozonation, hydrogen peroxide oxidation process, active carbon adsorption etc.The method that developed countries adopts is more, and what more generally use is materialization and the biochemical technique combining, and due to by the more difficult emission request that reaches of biochemical process, generally after biochemical treatment, all will adopt membrane filtration process.Some adopts concentrated distillation method, the processing of osmosis filtration method, and these two kinds of methods pollute the major defect of thing accumulation because construction investment and high, the dense water of working cost recharge and apply at home in how-do-you-do.The disposal site percolate of at present domestic many large-and-medium size cities all exists treatment effect poor, and efficiency is lower, and cost is higher.
[summary of the invention]
Technical problem to be solved by this invention is, for above-mentioned deficiency of the prior art, to provide a kind for the treatment of process of early stage percolate, and the method is effectively processed discharging standards by early stage percolate and discharged, and has effectively protected environment.
For achieving the above object, the present invention has adopted following technical proposals:
A treatment process for early stage percolate, is characterized in that:
(1) the leachate collection, early stage rubbish being produced is among equalizing tank.
(2), carry out anaerobic reaction among the percolate among described equalizing tank being transferred to complete mixed anaerobic reactor by water pump, under the condition of anaerobic, utilize the Degradation of anaerobion to make the most of organic substance decomposing in percolate that early stage rubbish produces, reach deodorizing and larger molecular organics is degraded to the object of small organic molecule.
(3), will transfer to integration denitrification reactor through the solution after anaerobic reaction, hydrophilic group urethane filler is installed in nitrification zone, in denitrification zone, place slowly-releasing carbon source type macromolecular material, aerating apparatus is installed in bottom, nitrification zone at described integration denitrification reactor, and to the nitrification zone aeration of described integration denitrification reactor, the lift that utilizes aeration to produce moves upward the solution of bottom, described integration denitrification reactor nitrification zone, and at top, produce the overflow of cleaving and enter denitrification zone, thereby realized the backflow of nitrification and denitrification.
(4), to transfer to Integral iron-carbon fenton reactor through the solution after denitrification reaction, described Integral iron-carbon fenton reactor comprises scum silica frost disengaging zone, iron carbon hydrogen peroxide Fenton's reaction district, rear reaction zone, among solution, add sulfuric acid and hydrogen peroxide, to aeration among described Integral iron-carbon fenton reactor, iron carbon produces micro-electrolysis reaction in acidic solution, and in Fenton's reaction, produce stronger oxygenizement, in the process of redox reaction, make organic macromolecule that fracture degraded occur, thereby eliminated the colourity of solution, improved the biodegradability of solution, under the powerful oxygenizement of hydroxyl radical free radical, chemical oxygen demand (COD) is able to more removal.
(5), among transferring to coagulating sedimentation device through the solution after Fenton's reaction, carry out coagulating sedimentation, among solution, add sodium hydroxide, flocculation agent, after flocculation reaction, enters settling tank solid-liquid separation, and the mud producing in this process is transferred to landfill yard.
(6), among transferring to activated sludge reactor through the solution after coagulating sedimentation, process, continue to pass into air among described activated sludge reactor, the mud producing among this process is transferred to landfill yard.
(7), among transferring to filtering basin through the solution after active sludge treatment, carry out filtration treatment, greatly reduce the suspended substance among sewage, make suspended substance reach emission standard.
, by filter after clear water transfer among sterilization pool, among solution, add dioxide peroxide disinfection, kill intestinal bacteria and again reduce chemical oxygen demand (COD).
(9), will be disposed to city domestic sewage pipeline through the solution of disinfecting, reach emission standard.
Described above the, (3) among step, in denitrification zone, place described slowly-releasing carbon source type macromolecular material for poly-β hydroxy fatty acid.
Described above the, (4) among step, among solution, add sulfuric acid, the pH value of regulator solution is 3～3.5.
Concentration at the described above the hydrogen peroxide (4) adding among step is 7.5%.
At the described above the flocculation agent (5) adding among step, it is polyacrylamide.
The invention has the beneficial effects as follows:
1, among the present invention, by a series of technical matters, combine, the first discharge standard of early stage percolate being processed to national regulation discharges.
2, the mud that among the present invention, complete mixed method anaerobic reactor is a kind of Forced Mixing, precipitation adopts gravity from the brand-new anaerobic system refluxing, complicated triphase separator and water distributor have been saved, biological respinse balance has been broken in the instant separation of bubble that the shearing force of Forced Mixing produces anaerobic sludge surface, and reaction is carried out towards aerogenesis direction.
3, among the present invention, anaerobism adopts complete mixed method anaerobic technology; Denitrogenation has adopted integrated nitration denitrification denitrogenation device, denitrification filler has adopted slowly-releasing carbon source type macromolecular material-poly-β hydroxy fatty acid (PHA), this material be the ground of the parasitism of denitrifying microorganism be also the nutrition source that this microorganism is liked most--β hydroxy fatty acid; Chemical oxidation has adopted iron-carbon micro-electrolysis and hydrogen peroxide hybrid technique to reach micro-electrolysis and Fenton process is oxidized the efficient oxidation function of simultaneously carrying out.
4, among the present invention in integration denitrification reactor, the lift that the nitrification zone of integration denitrification reactor has utilized aeration to produce moves upward the solution of bottom, and at top, produce the overflow of cleaving and enter denitrification zone, thereby realized the backflow of nitrification and denitrification, the effect refluxing has: the one, and the nitric acid nitrite anions that aerobic nitrification is produced is transported to denitrification zone, for denitrification provides nutrition source and nitric acid nitrite anions is converted into nitrogen, removes; The 2nd, the acid group that aerobic nitrification produces is transported to denitrification zone, with the hydroxide radical neutralization reaction that denitrification produces, has saved the interpolation of acid with alkali.Above function has not only been saved refluxing unit but also saved medicament, the electricity charge; The removal efficiency that has improved nitrate is used in the application of denitrification slowly-releasing carbon source type macromolecular material, has solved available organic carbon source in this waste water and has lacked the poky difficult problem of denitrifying bacteria.
[accompanying drawing explanation]
Fig. 1 is process flow diagram of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, the present invention is done to further detailed description.
As shown in Figure 1, a kind for the treatment of process of early stage percolate,
(1) the leachate collection, early stage rubbish being produced is among equalizing tank 1.
(2), among the percolate among described equalizing tank 1 being transferred to complete mixed anaerobic reactor 3 by water pump 2, carry out anaerobic reaction, under the condition of anaerobic, utilize the Degradation of anaerobion to make the most of organic substance decomposing in percolate that early stage rubbish produces, reach deodorizing and larger molecular organics is degraded to the object of small organic molecule, complete mixed method anaerobic reactor is a kind of Forced Mixing, the mud of precipitation adopts gravity from the brand-new anaerobic system refluxing, complicated triphase separator and water distributor have been saved, biological respinse balance has been broken in the instant separation of bubble that the shearing force of Forced Mixing produces anaerobic sludge surface, reaction is carried out towards aerogenesis direction.
(3), to transfer to integration denitrification reactor 4 through the solution after anaerobic reaction, hydrophilic group urethane filler is installed in nitrification zone, in denitrification zone, place slowly-releasing carbon source type macromolecular material, described slowly-releasing carbon source type macromolecular material is preferably poly-β hydroxy fatty acid, aerating apparatus is installed in bottom, nitrification zone at described integration denitrification reactor 4, and to the nitrification zone aeration of described integration denitrification reactor, the lift that utilizes aeration to produce moves upward the solution of described integration denitrification reactor 4 bottoms, nitrification zone, and at top, produce the overflow of cleaving and enter denitrification zone, thereby realized the backflow of nitrification and denitrification, the effect refluxing has: the one, and the nitric acid nitrite anions that aerobic nitrification is produced is transported to denitrification zone, for providing nutrition source and nitric acid nitrite anions is converted into nitrogen, removes denitrification, the 2nd, the acid group that aerobic nitrification produces is transported to denitrification zone, with the hydroxide radical neutralization reaction that denitrification produces, has saved the interpolation of acid with alkali.Above function has not only been saved refluxing unit but also saved medicament, the electricity charge; The removal efficiency that has improved nitrate is used in the application of denitrification slowly-releasing carbon source type macromolecular material, has solved available organic carbon source in this waste water and has lacked the poky difficult problem of denitrifying bacteria.
(4), to transfer to Integral iron-carbon fenton reactor 5 through the solution after denitrification reaction, described Integral iron-carbon fenton reactor 5 comprises scum silica frost disengaging zone, iron carbon hydrogen peroxide Fenton's reaction district, rear reaction zone, among solution, add sulfuric acid and hydrogen peroxide, pH value to 3～3.5 of regulator solution, the concentration of hydrogen peroxide is 7.5%, to aeration among described Integral iron-carbon fenton reactor 5, iron carbon produces micro-electrolysis reaction in acidic solution, and in Fenton's reaction, produce stronger oxygenizement, in the process of redox reaction, make organic macromolecule that fracture degraded occur, thereby eliminated the colourity of solution, improved the biodegradability of solution, under the powerful oxygenizement of hydroxyl radical free radical, chemical oxygen demand (COD) is able to more removal.
(5), among transferring to coagulating sedimentation device 6 through the solution after Fenton's reaction, carry out coagulating sedimentation, among solution, add sodium hydroxide, flocculation agent, after flocculation reaction, enters settling tank solid-liquid separation, and the mud producing in this process is transferred to landfill yard.
(6), among transferring to activated sludge reactor 7 through the solution after coagulating sedimentation, process, continue to pass into air among described activated sludge reactor 7, the mud producing among this process is transferred to landfill yard, activated sludge process is the main method of the biological wastewater treatment take active sludge as main body, activated sludge process is to pass into continuously air in waste water, the sludge-like throw out forming because of aerobic microbial reproduction after certain hour.On it, perching take zoogloea as main micropopulation, thering is very strong absorption and the ability of oxidation of organic compounds.By the effect of microorganism, the organism in Decomposition Wastewater, by the effect of aerobic microbiological, further removes the organism among solution, reduces chemical oxygen demand value, reaches emission standard.
(7), among transferring to filtering basin 8 through the solution after active sludge treatment, carry out filtration treatment, greatly reduce the suspended substance among sewage, make suspended substance reach emission standard.
, by filter after clear water transfer among sterilization pool 9, among solution, add dioxide peroxide disinfection, kill intestinal bacteria and again reduce chemical oxygen demand (COD).
(9), will be disposed to city domestic sewage pipeline through the solution of disinfecting, reach emission standard.
Claims (5)
1. a treatment process for early stage percolate, is characterized in that:
(1) the leachate collection, early stage rubbish being produced is among equalizing tank (1).
(2), carry out anaerobic reaction among the percolate among described equalizing tank (1) being transferred to complete mixed anaerobic reactor (3) by water pump (2), under the condition of anaerobic, utilize the Degradation of anaerobion to make the most of organic substance decomposing in percolate that early stage rubbish produces, reach deodorizing and larger molecular organics is degraded to the object of small organic molecule.
(3), will transfer to integration denitrification reactor (4) through the solution after anaerobic reaction, hydrophilic group urethane filler is installed in nitrification zone, in denitrification zone, place slowly-releasing carbon source type macromolecular material, aerating apparatus is installed in bottom, nitrification zone at described integration denitrification reactor (4), and to the nitrification zone aeration of described integration denitrification reactor, the lift that utilizes aeration to produce moves upward the solution of bottom, described integration denitrification reactor (4) nitrification zone, and at top, produce the overflow of cleaving and enter denitrification zone, thereby realized the backflow of nitrification and denitrification.
(4), to transfer to Integral iron-carbon fenton reactor (5) through the solution after denitrification reaction, described Integral iron-carbon fenton reactor (5) comprises scum silica frost disengaging zone, iron carbon hydrogen peroxide Fenton's reaction district, rear reaction zone, among solution, add sulfuric acid and hydrogen peroxide, to aeration among described Integral iron-carbon fenton reactor (5), iron carbon produces micro-electrolysis reaction in acidic solution, and in Fenton's reaction, produce stronger oxygenizement, in the process of redox reaction, make organic macromolecule that fracture degraded occur, thereby eliminated the colourity of solution, improved the biodegradability of solution, under the powerful oxygenizement of hydroxyl radical free radical, chemical oxygen demand (COD) is able to more removal.
(5), among transferring to coagulating sedimentation device (6) through the solution after Fenton's reaction, carry out coagulating sedimentation, among solution, add sodium hydroxide, flocculation agent, after flocculation reaction, enter settling tank solid-liquid separation, the mud producing in this process is transferred to landfill yard.
(6), among transferring to activated sludge reactor (7) through the solution after coagulating sedimentation, process, continue to pass into air among described activated sludge reactor (7), the mud producing among this process is transferred to landfill yard.
(7), among transferring to filtering basin (8) through the solution after active sludge treatment, carry out filtration treatment, greatly reduce the suspended substance among sewage, make suspended substance reach emission standard.
, by filter after clear water transfer among sterilization pool (9), among solution, add dioxide peroxide disinfection, kill intestinal bacteria and again reduce chemical oxygen demand (COD).
(9), will be disposed to city domestic sewage pipeline through the solution of disinfecting, reach emission standard.
2. the treatment process of early stage percolate according to claim 1, is characterized in that: described the, (3) among step, place described slowly-releasing carbon source type macromolecular material for poly-β hydroxy fatty acid in denitrification zone.
3. the treatment process of early stage percolate according to claim 1, is characterized in that: described the, (4) among step, among solution, add sulfuric acid, the pH value of regulator solution is 3～3.5.
4. the treatment process of early stage percolate according to claim 1, is characterized in that: the concentration at the described the hydrogen peroxide (4) adding among step is 7.5%.
5. the treatment process of early stage percolate according to claim 1, is characterized in that: at the described the flocculation agent (5) adding among step, be polyacrylamide.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152375A (en) * | 2014-07-18 | 2014-11-19 | 齐齐哈尔大学 | Deamination and deodorization bacterial strain QDN01 and application thereof in biological deodorization |
| CN109775930A (en) * | 2019-02-18 | 2019-05-21 | 江西盖亚环保科技有限公司 | The processing method of landfill leachate based on GY-3 type filler matrix |
| CN110240357A (en) * | 2019-06-17 | 2019-09-17 | 重庆耐德环境技术有限公司 | A kind of processing equipment and method of landfill leachate |
| CN112759200A (en) * | 2021-01-13 | 2021-05-07 | 中国科学院城市环境研究所 | Treatment method for achieving full quantity of landfill leachate to standard |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104152375A (en) * | 2014-07-18 | 2014-11-19 | 齐齐哈尔大学 | Deamination and deodorization bacterial strain QDN01 and application thereof in biological deodorization |
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| CN112759200A (en) * | 2021-01-13 | 2021-05-07 | 中国科学院城市环境研究所 | Treatment method for achieving full quantity of landfill leachate to standard |
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