CN103342426A - Percolate treatment method and device - Google Patents
Percolate treatment method and device Download PDFInfo
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- CN103342426A CN103342426A CN201310332421XA CN201310332421A CN103342426A CN 103342426 A CN103342426 A CN 103342426A CN 201310332421X A CN201310332421X A CN 201310332421XA CN 201310332421 A CN201310332421 A CN 201310332421A CN 103342426 A CN103342426 A CN 103342426A
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- percolate
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- iron powder
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Abstract
The invention discloses a percolate treatment method and a percolate treatment device. The percolate treatment method comprises the following steps of: S1, pretreating percolate by virtue of a rough filtration material; and S2, carrying out aftertreatment on the percolate treated by the step S1 by virtue of iron powder and a fine filtration material modified by activated carbon particles. According to the percolate treatment method, the percolate is treated by the rough filtration material as well as the iron powder and the fine filtration material modified by the activated carbon particles, ferric carbon internal electrolysis is carried out between the iron powder and the activated carbon particles, further a small current is produced, decomposition of a refractory organic matter is promoted, endogenous respiration of microorganisms in the filtration materials is enhanced, treatment effect of mineralized refuse for treating the percolate as a filtration material is further enhanced, and removal rate of total nitrogen is increased.
Description
Technical field
The invention belongs to technical field of waste water processing, be specifically related to a kind of leachate processing method and the percolate treatment unit corresponding with this method.
Background technology
Percolate is the secondary pollutant that produces in the consumer waste filling and embedding process, and its water quality and quantity is changeful, is subjected to factor affecting such as rubbish composition, landfill time and land-fill method bigger.The pollutent that contains multiple complexity in the percolate is as the organism (COD 2000 ~ 50000 mg/L) of high density, high ammonia nitrogen (800 ~ 3500 mg/L), various heavy (Zn, Cr, Pb, Ni, Cu etc.) and inorganic ion (Ca
2+, Mg
2+, K
+, Na
+, Cl
-, SO2-4 etc.), for the processing of percolate brings difficulty.
Percolate prior biological preconditioning technique has aerobic (as oxidation pond), anaerobism (as UASB, EGSB etc.) technology, membrane bioreactor (MBR) etc.But there is long, the more high deficiency of investment running cost start time.Mineralized refuse bioreactor is in the application of handling aspect the percolate, utilizes the material of mineralized waste cheap, the high degree of adaptability of microorganism and percolate wherein, shortened start time effectively, reduced investment and running cost.But, because being mainly anaerobic reaction, bed body inside has the part aerobic reaction concurrently, make that the ammonia nitrogen major part is converted into nitrate nitrogen and nitrite nitrogen accumulates in effective degradation of organic substances, and the clearance of total nitrogen is lower.
Summary of the invention
One of purpose of the present invention is to provide a kind of leachate processing method, can strengthen the total nitrogen removal effect of percolate effectively.
The present invention also aims to provide a kind of percolate treatment unit.
For solving one of foregoing invention purpose, the invention provides a kind of leachate processing method, this method may further comprise the steps:
S1, percolate is carried out pre-treatment by coarse media;
S2, the percolate after step S1 handles is carried out aftertreatment by the fine filtering material through iron powder and grain active carbon modification.
As a further improvement on the present invention, described step S2 specifically comprises:
With percolate successively by through iron powder and activated carbon modification but not handling by the fine filtering material of oxygen aeration and through iron powder and activated carbon modification and by the fine filtering material of oxygen aeration.
As a further improvement on the present invention, step S2 also comprises:
Earlier the fine filtering material was soaked in the percolate of COD＜1000mg/L 20 days, and grain active carbon is soaked in 48h in the percolate of COD＜1000mg/L.
As a further improvement on the present invention, the coarse media described in the step S1 is that particle size range is the mineralized waste of 20mm ~ 40mm.
As a further improvement on the present invention, the particle size range of the iron powder described in the step S2 is that the particle diameter of 150 μ m ~ 18 μ m, described grain active carbon is selected from the mineralized waste that can cross 1mm sieve less than 1mm, described fine filtering material.
As a further improvement on the present invention, the proportional range of the fine filtering material described in the step S2, iron powder, grain active carbon is 20:2:1 ~ 100:5:1 by mass.
As a further improvement on the present invention, carbon-nitrogen ratio＞4 of percolate and COD concentration range are 5000 ~ 10000mg/L among the step S1.
As a further improvement on the present invention, in the percolate treating processes, coarse media and through the solid-to-liquid ratio of the fine filtering material of iron powder and grain active carbon modification and percolate greater than 20:1.
For solving above-mentioned another goal of the invention, the invention provides a kind of percolate treatment unit, comprising:
Divide the coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material that is separated with fluid connection in the tank body, described tank body;
Be arranged at the perforation gas distribution pipe between the described anaerobism fine filtering bed of material and the aerobic fine filtering bed of material, offer the some pores that face the aerobic fine filtering bed of material on the described perforation gas distribution pipe;
Water delivery mechanism is used for extraneous percolate is driven successively by the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material, and discharges by the water outlet that is arranged on the described tank body.
As a further improvement on the present invention, the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material are arranged in described tank body from bottom to top, and the floor height proportional range of the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material is 1:2:2 ~ 1:5:5.
Compared with prior art; leachate processing method provided by the invention is by handling percolate through coarse media and through the fine filtering material of iron powder and grain active carbon modification; electrolysis in the iron carbon takes place between iron powder and the grain active carbon; and then generation Weak current; when promoting the organism decomposition of difficult degradation; improve microorganism endogenous respiration in the filtrate, and then strengthened the treatment effect of mineralized waste as filtrate processing percolate, improved the clearance of total nitrogen.
Description of drawings
Fig. 1 is the schema of an embodiment of leachate processing method of the present invention;
Fig. 2 is the structural representation of an embodiment of percolate treatment unit of the present invention;
Fig. 3 be among leachate processing method one embodiment of the present invention in the control group to the removal effect figure of COD;
Fig. 4 is the removal effect figure that adopts among the embodiment of leachate processing method of the present invention COD;
Fig. 5 be among leachate processing method one embodiment of the present invention in the control group to the removal effect figure of ammonia nitrogen;
Fig. 6 is the removal effect figure that adopts among the embodiment of leachate processing method of the present invention ammonia nitrogen;
Fig. 7 be among leachate processing method one embodiment of the present invention in the control group to the removal effect figure of total nitrogen;
Fig. 8 is the removal effect figure that adopts among the embodiment of leachate processing method of the present invention total nitrogen.
Embodiment
Describe the present invention below with reference to embodiment shown in the drawings.But these embodiments do not limit the present invention, and the conversion on the structure that those of ordinary skill in the art makes according to these embodiments, method or the function all is included in protection scope of the present invention.
Join Fig. 1, introduce an embodiment of leachate processing method of the present invention.This method may further comprise the steps in the present embodiment:
S1, percolate is carried out pre-treatment by coarse media.
The coarse media here is that particle size range is the mineralized waste of 20mm ~ 40mm, and the requirement of percolate is that carbon-nitrogen ratio＞4 and COD concentration range are 5000 ~ 10000mg/L.
S2, the percolate after step S1 handles is carried out aftertreatment by the fine filtering material through iron powder and grain active carbon modification.
The particle size range of the iron powder of selecting for use particularly, is that the particle diameter of 150 μ m ~ 18 μ m, grain active carbon is selected from the mineralized waste that can cross the 1mm sieve less than 1mm, fine filtering material.
In the concrete application process, earlier the fine filtering material was soaked in the percolate of COD＜1000mg/L 20 days, makes microorganism wherein obtain domestication, and grain active carbon is soaked in equally 48h in the percolate of COD＜1000mg/L, with the adsorption of eliminate activity carbon; And the proportional range of fine filtering material, iron powder, grain active carbon is 20:2:1 ~ 100:5:1 by mass.
Subsequently, with percolate successively by through iron powder and activated carbon modification but not handling by the fine filtering material of oxygen aeration and through iron powder and activated carbon modification and by the fine filtering material of oxygen aeration, make that the effect of nitrification and denitrification is comparatively balanced, the removal effect of ammonia nitrogen and total nitrogen in the reinforcement percolate.
In the treating processes of whole percolate, coarse media and through the solid-to-liquid ratio of the fine filtering material of iron powder and grain active carbon modification and percolate greater than 20:1, to guarantee percolate treatment effect preferably.
Join Fig. 2, introduce an embodiment of percolate treatment unit of the present invention.In the present embodiment, this percolate treatment unit comprises tank body 1, perforation gas distribution pipe 8 and water delivery mechanism 2.
Divide the coarse filtration bed of material 4, the anaerobism fine filtering bed of material 5, the aerobic fine filtering bed of material 6 that is separated with fluid connection in the tank body 1, perforation gas distribution pipe 8 is arranged between the anaerobism fine filtering bed of material 4 and the aerobic fine filtering bed of material 6, offer the some pores (not indicating) that face the aerobic fine filtering bed of material 6 on the perforation gas distribution pipe 8, need to prove, in fact, the anaerobism fine filtering bed of material 4 here and the aerobic fine filtering bed of material 6 namely are to separate definition by perforation gas distribution pipe 8, the part that faces some pores is defined as the aerobic fine filtering bed of material, otherwise, be the anaerobism fine filtering bed of material.Perforation gas distribution pipe 8 surfaces are twined and are enclosed with the filter cloth (not shown), in case filtrate stops up the pore on it.Perforation gas distribution pipe 8 external oxygen charging pumps 8 are to provide the aeration of oxygen.
The coarse filtration bed of material 4, the anaerobism fine filtering bed of material 5, the aerobic fine filtering bed of material 6 are arranged in described tank body 1 from bottom to top, and the floor height proportional range of the described coarse filtration bed of material 4, the anaerobism fine filtering bed of material 5, the aerobic fine filtering bed of material 6 is 1:2:2 ~ 1:5:5, the bottom of tank body 1 is provided with water-in 3, water delivery mechanism 2 pumps into tank body 1 by this water-in 3 with pending percolate, and successively by the coarse filtration bed of material 4, the anaerobism fine filtering bed of material 5, the aerobic fine filtering bed of material 6, finally discharge by water outlet 9 overflows on tank body 1 top.
Below contrast by specific embodiment more and to adopt leachate processing method of the present invention and common treatment process for the treatment effect of percolate.
Set up two pilot plants in the laboratory.The high 2.5m of cylindricality tank body, diameter 1m.Tank body A is control group, only fills the mineralized waste filler in inside, is divided into coarse stuff district (crossing 40 mm sieve, high 0.3m) and flour filler district (cross 1mm and shine high 1.5 m); Tank body B is the percolate treatment unit group of employing leachate processing method of the present invention, wherein, filtrate, 74 μ m iron powders: the mass ratio of grain active carbon (with dry weight basis)=50:5:3, at the fine filtering bed of material middle part gas distribution pipe is set, the aperture is upwards.During operation, percolate flows into from bottom to top, and keeping the interior solid-to-liquid ratio of tank body is 50:1, and the cycle of operation is 3 h.
Pending water sample comes from the mixed solution of aged percolate of 3 phases of Shanghai Lao Gang household refuse landfill sites and fresh percolate of 4 phases.Influent quality COD 4800-5400 mg/L, NH
3-N concentration is 1100-1400 mg/L, TN 1700-1850 mg/L.Concrete treatment effect is as follows:
(1) treatment effect to COD contrasts:
Join Fig. 3 and Fig. 4, represent the removal effect of tank body A and the COD of B respectively.COD is 4800-5400 mg/L in water inlet, and temperature is under the 21-37 ℃ of condition, and the COD removal effect of tank body B obviously is better than A, and the colourity of its water outlet also is far superior to A; The COD clearance of the two is respectively 79.8%-86.6%(tank body A) and 83.4%-97.4%(tank body B); The A water outlet is pale yellow inclined to one side brown, and the B water outlet is extremely yellowish inclined to one side white.When reaction bed moves 40 days, tank body B water outlet COD＜200 mg/L, A water outlet COD is between 700-900 mg/L.
(2) treatment effect to ammonia nitrogen contrasts:
Join Fig. 5 and Fig. 6, represent the NH of tank body A and B respectively
3-N(ammonia nitrogen) removes test-results.As can be seen, under same test conditions, the NH of tank body B
3-N removal effect obviously is better than A.At water inlet NH
3-N concentration is under the 1100-1400 mg/L condition, the NH of tank body B
3The clearance of-N is 91.7-96.8%, and the NH of tank body A
3The clearance of-N is 86.0-93.3%.Move after 30 days tank body A water outlet NH
3-N＜100 mg/L; Tank body B water outlet NH
3-N＜70 mg/L, and reducing water outlet NH after 45 days along with the prolongation in reaction times always always
3-N＜50 mg/L.
(3) treatment effect to total nitrogen contrasts:
Join Fig. 7 and Fig. 8, represent the removal test-results of the total nitrogen (TN) of tank body A and B respectively.Under same test conditions, the removal effect of the total nitrogen of tank body B obviously is better than A, and the clearance of the total nitrogen of tank body A is 38.4-47.5%, and after the mineralized waste modification added aeration, the clearance of the total nitrogen of tank body B was increased to 68.7-76.4%, has improved 1 times.At run duration, tank body A water outlet total nitrogen maintains about 1000 mg/L substantially, and tank body B water outlet total nitrogen significantly reduces, and can be down to about 400 mg/L.This mainly is because the anaerobic and aerobic district exists simultaneously among the tank body B, has strengthened the nitrification and denitrification process, makes the total nitrogen major part be converted into N
2Overflow.
The present invention is by above embodiment; have following beneficial effect: leachate processing method provided by the invention is by handling percolate through coarse media and through the fine filtering material of iron powder and grain active carbon modification; electrolysis in the iron carbon takes place between iron powder and the grain active carbon; and then generation Weak current; when promoting the organism decomposition of difficult degradation; improved microorganism endogenous respiration in the filtrate; and then strengthened the treatment effect of mineralized waste as filtrate processing percolate, improve the clearance of total nitrogen.
Be to be understood that, though this specification sheets is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets only is for clarity sake, those skilled in the art should make specification sheets as a whole, technical scheme in each embodiment also can form other embodiments that it will be appreciated by those skilled in the art that through appropriate combination.
Above listed a series of detailed description only is specifying at feasibility embodiment of the present invention; they are not in order to limiting protection scope of the present invention, allly do not break away from equivalent embodiment or the change that skill spirit of the present invention does and all should be included within protection scope of the present invention.
Claims (10)
1. a leachate processing method is characterized in that, this method may further comprise the steps:
S1, percolate is carried out pre-treatment by coarse media;
S2, the percolate after step S1 handles is carried out aftertreatment by the fine filtering material through iron powder and grain active carbon modification.
2. method according to claim 1 is characterized in that, step S2 specifically comprises:
With percolate successively by through iron powder and activated carbon modification but not handling by the fine filtering material of oxygen aeration and through iron powder and activated carbon modification and by the fine filtering material of oxygen aeration.
3. method according to claim 1 is characterized in that, step S2 also comprises:
Earlier the fine filtering material was soaked in the percolate of COD＜1000mg/L 20 days, and grain active carbon is soaked in 48h in the percolate of COD＜1000mg/L.
4. method according to claim 1 is characterized in that, the coarse media described in the step S1 is that particle size range is the mineralized waste of 20mm ~ 40mm.
5. method according to claim 1 is characterized in that, the particle size range of the iron powder described in the step S2 is that the particle diameter of 150 μ m ~ 18 μ m, described grain active carbon is selected from the mineralized waste that can cross the 1mm sieve less than 1mm, described fine filtering material.
6. method according to claim 1 is characterized in that, the proportional range of the fine filtering material described in the step S2, iron powder, grain active carbon is 20:2:1 ~ 100:5:1 by mass.
7. method according to claim 1 is characterized in that, the carbon-nitrogen ratio of percolate＞4 and COD concentration range are 5000 ~ 10000mg/L among the step S1.
8. method according to claim 1 is characterized in that, in the percolate treating processes, coarse media and through the solid-to-liquid ratio of the fine filtering material of iron powder and grain active carbon modification and percolate greater than 20:1.
9. a percolate treatment unit is characterized in that, comprising:
Divide the coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material that is separated with fluid connection in the tank body, described tank body;
Be arranged at the perforation gas distribution pipe between the described anaerobism fine filtering bed of material and the aerobic fine filtering bed of material, offer the some pores that face the aerobic fine filtering bed of material on the described perforation gas distribution pipe;
Water delivery mechanism is used for extraneous percolate is driven successively by the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material, and discharges by the water outlet that is arranged on the described tank body.
10. percolate treatment unit according to claim 9, it is characterized in that, the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material are arranged in described tank body from bottom to top, and the floor height proportional range of the described coarse filtration bed of material, the anaerobism fine filtering bed of material, the aerobic fine filtering bed of material is 1:2:2 ~ 1:5:5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915502A (en) * | 2018-01-30 | 2018-04-17 | 常州大学 | A kind of rubbish from cooking collector |
| 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 |
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| CN1789173A (en) * | 2005-12-27 | 2006-06-21 | 同济大学 | Method for treating leachate in domestic refuses landfill site by tower type aged-refuse bioreactor |
| KR20090133038A (en) * | 2008-06-23 | 2009-12-31 | 에코랜드 주식회사 | Clean-up treatment of leachate in unsanitary waste landfill |
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2013
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| CN2741969Y (en) * | 2004-10-26 | 2005-11-23 | 苏州科技学院 | Ouasi aerobic biological reaction bed |
| CN1789173A (en) * | 2005-12-27 | 2006-06-21 | 同济大学 | Method for treating leachate in domestic refuses landfill site by tower type aged-refuse bioreactor |
| KR20090133038A (en) * | 2008-06-23 | 2009-12-31 | 에코랜드 주식회사 | Clean-up treatment of leachate in unsanitary waste landfill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915502A (en) * | 2018-01-30 | 2018-04-17 | 常州大学 | A kind of rubbish from cooking collector |
| 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 |
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Application publication date: 20131009 |