CN110330147A - Rapid treatment method for sludge landfill leachate - Google Patents
Rapid treatment method for sludge landfill leachate Download PDFInfo
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- CN110330147A CN110330147A CN201910691182.4A CN201910691182A CN110330147A CN 110330147 A CN110330147 A CN 110330147A CN 201910691182 A CN201910691182 A CN 201910691182A CN 110330147 A CN110330147 A CN 110330147A
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- percolate
- sludge
- processing method
- sludge landfill
- immediate processing
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- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000149 chemical water pollutant Substances 0.000 title 1
- 239000000701 coagulant Substances 0.000 claims abstract description 17
- 239000007800 oxidant agent Substances 0.000 claims abstract description 16
- 230000001590 oxidative effect Effects 0.000 claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 7
- 238000003672 processing method Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 13
- 238000005345 coagulation Methods 0.000 claims description 12
- 230000015271 coagulation Effects 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 8
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 7
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 7
- 238000005189 flocculation Methods 0.000 claims description 5
- 230000016615 flocculation Effects 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000001112 coagulating effect Effects 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000000575 pesticide Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011026 diafiltration Methods 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- KQPBSBAEBKRAAU-UHFFFAOYSA-N hypochlorous acid;sodium Chemical group [Na].ClO KQPBSBAEBKRAAU-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002846 particulate organic matter Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a method for quickly treating percolate in a sludge landfill, which comprises the steps of adding a coagulant into the sludge percolate to be treated, stirring, coagulating, separating, adding an oxidant into the obtained supernatant, and stirring. Compared with the prior art, the optimal condition for treating the sludge leachate by the coagulation-oxidation process is obtained by optimization, so that pollutants in the sludge leachate are quickly and effectively reduced, and the effect of the pesticide is exerted to the maximum. The method provides a referential technical support for the treatment and disposal of the sludge landfill, and has important practical significance.
Description
Technical field
The invention belongs to the leachate treatment technology fields of sludge landfill, and it is quick to be related to a kind of sludge landfill percolate
Processing method.
Background technique
For a long time, the sludge of most of sewage treatment plants, China carries out landfill stabilization after dehydration.In " cities and towns dirt
Water treatment plant's sludge treatment blended landfill shale " (GB/T 23485-2009) issuing and implementation before, the sludge into landfill yard contains
Water rate is usually 80% or so, and it is high to have the defects that landfill volume occupies.As landfill resource tightens, advanced age sludge landfill
Exploitation, the processing of sludge percolate and resource reclaim become new research hotspot.With the extension of landfill time, sludge is in anaerobism
Under the conditions of, sludge mud has changed a lot, and generated metabolite and moisture form the high concentration of complicated component
Percolate.The quick processing of sludge percolate is the key that exploitation and the social need-oriented for solving the problems, such as landfill yard.
Coagulant sedimentation is the conventional method in Wastewater Pretreatment, after adding chemical floc into waste water, flocculant and
Colloid and suspended particulate in waste water generate wadding body precipitating；Can effectively reduce after coagulating treatment organic matter in waste water, turbidity and
The indexs such as coloration, effluent quality can be improved significantly.Sodium hypochlorite oxidization can depth remove Organic substance in water, add excess
NaClO the ammonia nitrogen in waste water can be made to be completely converted into nitrogen, to remove ammonia nitrogen in waste water.
Sludge is during long-term landfill, with the continuous degradation of sludge under anaerobic condition, a large amount of sludge percolate
It can generate therewith.Its water quality characteristic is influenced by factors such as landfill time, weather conditions, rainfalls, even if in the same landfill yard
Interior, sample point is different, and water quality can also generate biggish difference.Organic concentration and ammonia-nitrogen content are higher in landfill percolate,
Especially the concentration of ammonia nitrogen begins to be continuously increased after landfill yard enters the methane phase stage.But due in percolate total phosphorus it is dense
Relatively low, the nutrient growth out of proportion for being unfavorable for microorganism is spent, traditional bioanalysis is not suitable for the processing of sludge percolate.
Therefore, for the water quality characteristics of sludge percolate, finding suitable leachate processing method is to solve Sludge landfill
The exploitation of field and the key of social need-oriented.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of sludge landfills to seep
Filtrate immediate processing method.The optimum condition that coagulation-oxidation technology handles sludge percolate is obtained by optimization processing, is quickly had
Pollutant in the abatement sludge percolate of effect, and pharmacy effect is made to obtain maximum performance.It is mentioned for the processing disposition of sludge landfill
For referential technical support, there is important practical significance.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of sludge landfill percolate immediate processing method is first added coagulant into pending mud percolate, stirs
Coagulation is mixed, is separated, then add oxidant into gained supernatant, stir process is completed.
Further, the COD of pending mud percolate is 1000~3000mg/L, NH4 +- N concentration be 2000~
5000mg/L。
Further, the coagulant is the combination of one or both of iron chloride or bodied ferric sulfate, dosage
For 200~500mg/L.
Further, it after coagulant processing is added, is also subsequently added into flocculant and carries out flocculation treatment, then, separate institute
It obtains in supernatant and the oxidant is added.
Further, the flocculant is polyacrylamide (PAM), and dosage is 2~8mg/L.
Further, during flocculation treatment, mixing speed 25-100rpm, the processing time is 10-30min.
Further, it stirs in coagulation process, 10~40s is first handled under 200~600rpm speed of agitator, is then existed
10~30min is handled under (flocculant can also be added herein) 25~100rpm speed of agitator, while may be optionally added flocculant.
Further, the oxidant is sodium hypochlorite, and dosage meets: oxidant and NH4 +The molar ratio of-N is
0.65-2.5。
Further, after adding oxidant, the revolving speed of stir process is 20-60rpm, time 10-40min.
Total nitrogen (TN) content is up to 2000mg/L or more in sludge landfill percolate, wherein with NH4 +- N is to be primarily present
Form accounts for the 78% of TN concentration.Ultraviolet spectrogram analysis shows that, hardly degraded organic substance content is higher in landfill percolate, no
Biochemical method is easily used, small organic molecule accounting is larger, and coagulation is limited to its removal effect.Different types of coagulant
It differs greatly to the removal rate of turbidity, coloration and organic matter.By preferred coagulant, after coagulating treatment, particulate organic matter
Removal effect is significant, and larger molecular organics part removes in dissolved organic matter, and the total removal rate of COD concentration is about 50%, needs
Further advanced treating.Sodium hypochlorite has the characteristics that oxidisability is strong, good economy performance, and oxidation processes can remove in percolate simultaneously
Small organic molecule and ammonia nitrogen, COD and NH4 +- N removal rate is up to 95% or more.
Based on the above water quality characteristic, the present invention mainly uses coagulation-oxidation processing technique quickly to remove sludge diafiltration
COD and NH in liquid4 +- N compensates for the blank of domestic sludge landfill percolate treatment industry at present.
Compared with prior art, the invention has the following advantages that
(1) by optimised coagulation agent dosage and reaction condition, turbidity, the color of sludge percolate efficiently can quickly be removed
Degree and partial organic substances, the water outlet of sludge percolate is limpid after guarantee processing while reducing coagulant charging quantity, COD content
It is greatly reduced.
(2) by optimization oxidant dosage and reaction condition, while reducing oxidant dosage after guarantee processing
The water outlet COD and NH of sludge percolate4 +- N removal rate reaches 95% or more.
(3) rapid treating technology of sludge percolate reduces processing cost while guaranteeing treatment effect, has good
Good economy.
Detailed description of the invention
Fig. 1 is different coagulants treated effect picture；
Fig. 2 is COD in sludge percolate after coagulating treatment, the treatment effect figure of turbidity, coloration；
Fig. 3 is COD and NH in sludge percolate after oxidation processes4 +The removal effect figure of-N.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment 1
Present embodiments provide a kind of sludge landfill percolate immediate processing method, comprising the following steps:
Step 1: carrying out coagulating treatment to sludge percolate, the COD concentration of pending mud percolate is 1391.3mg/
L, NH4 +- N concentration is 3561.6mg/L.Coagulation experiment on coagulation experiment blender in carrying out, coagulation detailed process are as follows: is added mixed
Quickly (200rpm) stirs 30s after solidifying agent, and sludge percolate is made sufficiently to carry out coagulating；It is added followed by flocculant at a slow speed
(50rpm) stirs 20min, promotes preliminarily forming for wadding body.
Dosing coagulant is anhydrous FeCl3+ bodied ferric sulfate (mass ratio 1:1), additive amount are about 250mg/L, are mixed
Retrogradation obtains supernatant after forming sediment.Effect picture as shown in Figure 2, removal effect shadow of the coagulation agent dose to turbidity, coloration and organic matter
It rings significantly, for the maximum material removal rate of optimum dosage 400mg/L, COD up to 63.33%, minimal turbidity and coloration are respectively 21NTU
With 424.
Step 2: adding oxidant into supernatant described in the first step, oxidation processes, the oxidant is hypochlorous acid
Sodium, oxidation experiment on magnetic stirring apparatus in carrying out.The dosing molar ratio of oxidant is NaClO and NH4 +The molar ratio of-N, dosing rub
You are than about 1.2 or so, oxidation treatment time 30min.
Effect picture is shown in Figure 3 after oxidation processes, after oxidation processes, COD and NH4 +The removal rate of-N up to 98% with
On.
Different type coagulant is selected to carry out coagulation experiment under the process conditions of embodiment 1, coagulant charging quantity is
400mg/L, effect picture are shown in Figure 1.There are larger for removal effect of the different type coagulant to turbidity, coloration and organic matter
Difference, optimal coagulant are anhydrous FeCl3+ bodied ferric sulfate.Fig. 1 Chinese medicine is respectively anhydrous FeCl3(A), it polymerize AlCl3
(B)、Al2(SO4)3·18H2O (C), bodied ferric sulfate (D), anhydrous FeCl3+ bodied ferric sulfate (E), Al2(SO4)3·18H2O+
Bodied ferric sulfate (F).
Embodiment 2
Compared with Example 1, the overwhelming majority is all identical, in addition in the present embodiment, the additive amount of coagulant is 50mg/L.
Embodiment 3
Compared with Example 1, the overwhelming majority is all identical, in addition in the present embodiment, the additive amount of coagulant is 500mg/L.
Embodiment 4
Compared with Example 1, the overwhelming majority is all identical, in addition in the present embodiment, oxidant NaClO and NH4 +Mole of-N
Than being 0.65.
Embodiment 5
Compared with Example 1, the overwhelming majority is all identical, in addition in the present embodiment, oxidant NaClO and NH4 +Mole of-N
Than being 2.5.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (9)
1. a kind of sludge landfill percolate immediate processing method, which is characterized in that be first added into pending mud percolate
Coagulant and flocculant stir coagulation, separation, then add oxidant into gained supernatant, stir process is completed.
2. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that dirt to be processed
The COD of mud percolate is 1000~3000mg/L, NH4 +- N concentration is 2000~5000mg/L.
3. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that the coagulation
Agent is the combination of one or both of iron chloride or bodied ferric sulfate, and dosage is 100~600mg/L.
4. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that mixed being added
After solidifying agent processing, also it is subsequently added into flocculant progress flocculation treatment and the oxidant is then added in separating obtained supernatant.
5. a kind of sludge landfill percolate immediate processing method according to claim 4, which is characterized in that the flocculation
Agent is polyacrylamide, and dosage is 2~8mg/L.
6. a kind of sludge landfill percolate immediate processing method according to claim 4, which is characterized in that flocculation treatment
In the process, mixing speed 25-100rpm, processing time are 10-30min.
7. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that stirring coagulation
In the process, 10~40s is first handled under 200~600rpm speed of agitator, then handles 10 under 25~100rpm speed of agitator
~30min.
8. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that the oxidation
Agent is sodium hypochlorite, and dosage meets: oxidant and NH4 +The molar ratio of-N is 0.65-2.5.
9. a kind of sludge landfill percolate immediate processing method according to claim 1, which is characterized in that add oxidation
After agent, the revolving speed of stir process is 20-60rpm, time 10-40min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910691182.4A CN110330147A (en) | 2019-07-29 | 2019-07-29 | Rapid treatment method for sludge landfill leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691182.4A CN110330147A (en) | 2019-07-29 | 2019-07-29 | Rapid treatment method for sludge landfill leachate |
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| Publication Number | Publication Date |
|---|---|
| CN110330147A true CN110330147A (en) | 2019-10-15 |
Family
ID=68147905
Family Applications (1)
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| CN201910691182.4A Pending CN110330147A (en) | 2019-07-29 | 2019-07-29 | Rapid treatment method for sludge landfill leachate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762912A (en) * | 2020-06-09 | 2020-10-13 | 天津渤化环境修复股份有限公司 | Pretreatment method for underground water of pesticide plant |
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| US20070003370A1 (en) * | 2005-07-04 | 2007-01-04 | Liao Zhi Min | A method for treating landfill leachate |
| CN101767854A (en) * | 2010-01-13 | 2010-07-07 | 昆明理工大学 | Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills |
| CN104310638A (en) * | 2014-10-13 | 2015-01-28 | 西安华陆环保设备有限公司 | Method for pre-treating landfill leachate by coagulation-ozonation |
-
2019
- 2019-07-29 CN CN201910691182.4A patent/CN110330147A/en active Pending
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| US20070003370A1 (en) * | 2005-07-04 | 2007-01-04 | Liao Zhi Min | A method for treating landfill leachate |
| CN101767854A (en) * | 2010-01-13 | 2010-07-07 | 昆明理工大学 | Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111762912A (en) * | 2020-06-09 | 2020-10-13 | 天津渤化环境修复股份有限公司 | Pretreatment method for underground water of pesticide plant |
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Application publication date: 20191015 |