CN101767854A - Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills - Google Patents
Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills Download PDFInfo
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- CN101767854A CN101767854A CN201010039157A CN201010039157A CN101767854A CN 101767854 A CN101767854 A CN 101767854A CN 201010039157 A CN201010039157 A CN 201010039157A CN 201010039157 A CN201010039157 A CN 201010039157A CN 101767854 A CN101767854 A CN 101767854A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000001112 coagulating effect Effects 0.000 title claims abstract description 12
- 230000003311 flocculating effect Effects 0.000 title claims abstract description 7
- 238000001728 nano-filtration Methods 0.000 title abstract description 8
- 239000012141 concentrate Substances 0.000 title abstract 4
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 239000002131 composite material Chemical class 0.000 claims abstract description 3
- 238000005345 coagulation Methods 0.000 claims description 29
- 230000015271 coagulation Effects 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000005189 flocculation Methods 0.000 claims description 16
- 230000016615 flocculation Effects 0.000 claims description 16
- 230000003851 biochemical process Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000000701 coagulant Substances 0.000 abstract 6
- 239000008394 flocculating agent Substances 0.000 abstract 6
- 238000006116 polymerization reaction Methods 0.000 abstract 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical class [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000012528 membrane Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000005325 percolation Methods 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 2
- 239000004021 humic acid Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills, which belongs to the technical field of environment protection. The present invention uses reasonable coagulating/flocculating agent kinds, coagulating/flocculating agent dosage, pH-value processing time and stirring time to adjust the pH-valve range of the nanofiltration concentrate reject stream to 7.5 to 10. Polymerization aluminum salt, polymerization alite, or composite salt is used as coagulating/flocculating agent. The feeding amount of the coagulating/flocculating agent is 50 to 1000 mg/L accounted by Al2O3. The coagulating/flocculating agent is stirred rapidly first at 100 to 280 r/min for 0.5 to 5 min; then, the coagulating/flocculating agent is stirred slowly at 20 to 100 r/min for 3 to 30 min; and solid-liquid separation is done. By the processing of the coagulating/flocculating method, the nanofiltration concentrate reject stream of early percolate can be discharged within controlling index of national standard.
Description
Technical field
The invention belongs to environmental protection technical field, relate to the handling problem that the refuse landfill percolate adopts the membrane concentration liquid of " biochemical process+embrane method advanced treatment " back generation, particularly relate to the processing of the early stage percolation liquid membrane concentrated solution of refuse landfill.
Background technology
Sanitary landfill method is the topmost treatment and disposal method of present China domestic refuse, also is the main methods of external most countries.The treatment technology of the percolate practical application that refuse landfill produces is mainly: 1. biological and treatment technology that physico-chemical process combines; 2. biochemical process+membrane filtration is the treatment technology of main body; 3. leachate recirculation landfill yard method.But the most effective treatment process of percolate is " biochemical process+film is handled " technology at present.
In " biochemical process+film is handled " treatment technology, ultrafiltration (UF) replaces second pond generally as conventional processing (MBR); And nanofiltration (NF) and reverse osmosis (RO) are generally as the advanced treatment means.The film-filter concentration liquid that relates among the application mainly is meant nanofiltration membrane concentrated solution and reverse osmosis membrane concentrated solution.
The concentrated solution water yield that membrane treatment process produces is bigger, accounts for to handle 10%～15% of the water yield.The rubbish percolation liquid membrane concentrated solution belongs to the organic waste water of high density, difficult for biological degradation, wherein contains a large amount of humic acid macromolecule organism, and intractability is big, has limited application and the development of " biochemical process+film is handled " process integration in percolate is handled.Therefore, fast, effectively, economically the percolate film-filter concentration liquid is handled or pre-treatment, effective disposal of percolate and the popularization of " biochemical process+film is handled " combination technique had vital role.
At present, the main methods of percolate film-filter concentration liquid rarely has report for method of recharging and method of evaporation, other treatment process.But these two kinds of methods all exist certain shortcoming and limitation.The method of recharging can make some pollutent circulation accumulation, reduces the life-span of film processing system, and might make landfill yard enter " aging " in advance; Method of evaporation temporarily is difficult to promote owing to energy consumption height, apparatus expensive.Therefore, research and development concentrated solution economy, effectively treatment process is extremely urgent.The applicant studies show that the water quality of percolate film-filter concentration liquid exists than big-difference with the variation at landfill age, and the organic content in the early stage percolate film-filter concentration liquid is starkly lower than organic content in the middle and advanced stage concentrated solution.Therefore different landfill percolate in age film-filter concentration liquids should adopt different treatment process.The present method of recharging and method of evaporation are not generally considered the situation that the water quality of concentrated solution changed with the refuse landfill landfill age.
The applicant studies show that, coagulation/flocculence is better to removal effect of organic matter in the early stage percolation liquid membrane filter concentration liquid of refuse landfill, water outlet can reach reuse or emission request, can simplify the treatment process of early stage percolation liquid membrane filter concentration liquid effectively, coagulation/throw out that coagulation/flocculence is produced can carry out recycling simultaneously.
Coagulation/flocculence is handled the research of early stage percolate film-filter concentration liquid and is used and also do not see the report similar with the application as yet.
Summary of the invention
For solving the processing difficult problem of percolate film-filter concentration liquid, the film processing unit is promoted as the deep treatment method of percolate, the purpose of this invention is to provide a kind of method of the economic, practical early stage percolate film-filter concentration liquid of processing.
The technical solution adopted for the present invention to solve the technical problems is: according to the water quality characteristics of early stage percolate film-filter concentration liquid, determine coagulation/flocculation agent kind, coagulation/flocculation agent consumption that coagulation/flocculence adopted when handling early stage percolate film-filter concentration liquid, handle pH value and churning time.
Concrete grammar of the present invention is that for the film-filter concentration liquid that film unit in " biochemical process+film is handled " technology produces, adjusting to the pH scope is 7.5～10; Coagulation/flocculation agent adopts polyaluminium salts, polymeric aluminum molysite or based on the composite salt of polyaluminium salts; Coagulation/flocculant dosage is with Al
2O
3Count 50～1000mg/L, stir fast earlier, speed 100～280r/min, time 0.5～5min stirs speed 20～100r/min, time 3～30min, solid-liquid separation then more at a slow speed.
Above-mentioned coagulation/flocculation agent the preferred kind of the present invention is: polyaluminium salts (PA) adopts polymerize aluminum chloride (PAC), polyaluminium sulfate (PAS) and polymer aluminium silicate (PASi); Polymeric aluminum molysite (PAF) adopts aluminium iron polychloride (PAFC), PAFS (PAFS) and polymeric aluminium ferrum silicate (PAFSi); Be mixed with 5%～30% polymeric ferric salt or ferric-polysilicate salt in complex coagulation/flocculation agent based on polyaluminium salts (PA).
Beneficial effect of the present invention is:
Early stage coagulation/the flocculating effect of concentrated solution under weak basic condition is better, and by selecting suitable coagulation/flocculation agent for use, more effectively the organism in the planar water makes the functional group of metal-salt and humic acid that complexing or chelatropic reaction take place.Relative method of evaporation and recharge method, that coagulation/flocculence has is simple to operate, working cost is low, can not influence the advantages such as normal operation of landfill yard.Early stage percolate film-filter concentration liquid is after coagulation/flocculence is handled, and water outlet can reach the emission request among the GB16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
Embodiment
In specific embodiment, embodiment 1 and embodiment 2 process object are the early stage percolate nanofiltration of A landfill yard concentrated solution, and the landfill age is 1 year; Embodiment 3 and embodiment 4 process object are the early stage percolate reverse osmosis concentrated liquid of B landfill yard, and the landfill age is half a year; Embodiment 5 and embodiment 6 process object are the early stage percolate reverse osmosis concentrated liquid of C landfill yard, and the landfill age is half a year.
(1) embodiment 1: for the early stage percolate film-filter concentration liquid of A landfill yard, former concentrated solution pH value is 8.3, belongs to the weakly alkaline scope, water sample pH value need not to adjust, open stirrer, coagulation/flocculation agent adopts aluminium iron polychloride (PAFC), adds aluminium iron polychloride PAFC (with Al
2O
3Meter) 800mg/L stirs earlier fast, speed 100r/min, and time 5min stirs at a slow speed again, speed 20r/min, time 30min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 1, the early stage percolate film-filter concentration liquid of the A landfill yard water-quality guideline of being got is: 160 times of colourities, COD 280mg/L.Under the operation steps and parameter condition of embodiment 1, the effluent quality index is: 35 times of colourities, COD 90mg/L, clearance reaches 78% and 68% respectively, and water outlet reaches the emission request among the GB 16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
(2) embodiment 2: for the early stage percolate film-filter concentration liquid of A landfill yard, former concentrated solution pH value is 8.3, and water sample pH value need not to adjust, and opens stirrer, and coagulation/flocculation agent adopts polymerize aluminum chloride (PAC), and add-on is (with Al
2O
3Meter) be 1000mg/L, stir fast earlier, speed 280r/min, time 0.5min stirs at a slow speed again, speed 100r/min, time 3min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 2, the early stage percolate film-filter concentration liquid of the A landfill yard water-quality guideline of being got is: 160 times of colourities, COD 280mg/L.Under the operation steps and parameter condition of embodiment 2, the effluent quality index is: 30 times of colourities, COD 82mg/L, clearance reaches 81% and 71% respectively, and water outlet reaches the emission request among the GB16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
(3) embodiment 3: for the early stage percolate film-filter concentration liquid of B landfill yard, former concentrated solution pH value is 7.7, and adjusting water sample pH value is 10, opens stirrer, and coagulation/flocculation agent adopts PAFS (PAFS), and add-on is (with Al
2O
3Meter) be 500mg/L, stir fast earlier, speed 200r/min, time 2min stirs at a slow speed again, speed 50r/min, time 10min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 3, the early stage percolate film-filter concentration liquid of the B landfill yard water-quality guideline of being got is: 150 times of colourities, COD 250mg/L.Under the operation steps and parameter condition of embodiment 3, the effluent quality index is: 35 times of colourities, COD 85mg/L, clearance reaches 77% and 66% respectively, and water outlet reaches the emission request among the GB16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
(4) embodiment 4: for the early stage percolate film-filter concentration liquid of B landfill yard, former concentrated solution pH value is 7.7, and adjusting water sample pH value is 10, opens stirrer, and coagulation/flocculation agent adopts polyaluminium sulfate (PAS), and add-on is (with Al
2O
3Meter) be 400mg/L, stir fast earlier, speed 200r/min, time 3min stirs at a slow speed again, speed 50r/min, time 15min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 4, the early stage percolate film-filter concentration liquid of the B landfill yard water-quality guideline of being got is: 150 times of colourities, COD 250mg/L.Under the operation steps and parameter condition of embodiment 4, the effluent quality index is: 35 times of colourities, COD 92mg/L, clearance reaches 77% and 63% respectively, and water outlet reaches the emission request among the GB16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
(5) embodiment 5: for the early stage percolate film-filter concentration liquid of C landfill yard, former concentrated solution pH value is 6.5, and adjusting water sample pH value is 7.5, opens stirrer, coagulation/flocculation agent adopts complex coagulation/flocculation agent, and (PAC: PAS=95%: 5%), add-on is (with Al
2O
3Meter) be 50mg/L, stir fast earlier, speed 100r/min, time 5min stirs at a slow speed again, speed 20r/min, time 30min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 5, the early stage percolate film-filter concentration liquid of the C landfill yard water-quality guideline of being got is: 100 times of colourities, COD 160mg/L.Under the operation steps and parameter condition of embodiment 5, the effluent quality index is: 28 times of colourities, COD 80mg/L, clearance reaches 72% and 50% respectively, and water outlet reaches the emission request among the GB 16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
(6) embodiment 6: for the early stage percolate film-filter concentration liquid of C landfill yard, former concentrated solution pH value is 6.5, and adjusting water sample pH value is 7.5, opens stirrer, coagulation/flocculation agent adopts complex coagulation/flocculation agent, and (PAC: PAS=70%: 30%), add-on is (with Al
2O
3Meter) be 100mg/L, stir fast earlier, speed 280r/min, time 0.5min stirs at a slow speed again, speed 100r/min, time 3min, clear liquid reaches discharging and reuse requirement after the solid-liquid separation.
Among the embodiment 6, the early stage percolate film-filter concentration liquid of the C landfill yard water-quality guideline of being got is: 100 times of colourities, COD 160mg/L.Under the operation steps and parameter condition of embodiment 6, the effluent quality index is: 20 times of colourities, COD 74mg/L, clearance reaches 80% and 54% respectively, and water outlet reaches the emission request among the GB 16889-2008 " household refuse landfill sites pollution control criterion ", can directly discharge.
Claims (2)
1. coagulation/the coagulating/flocculating method for processing of an early stage percolate film-filter concentration liquid is characterized in that: for the film-filter concentration liquid that film unit in " biochemical process+film is handled " technology produces, adjusting to the pH scope is 7.5～10; Coagulation/flocculation agent adopts polyaluminium salts, polymeric aluminum molysite or based on the composite salt of polyaluminium salts; Coagulation/flocculant dosage is with Al
2O
3Count 50～1000mg/L, stir fast earlier, speed 100～280r/min, time 0.5～5min stirs speed 20～100r/min, time 3～30min, solid-liquid separation then more at a slow speed.
2. coagulation/the coagulating/flocculating method for processing of early stage percolate film-filter concentration liquid according to claim 1 is characterized in that: polyaluminium salts adopts polymerize aluminum chloride, polyaluminium sulfate and polymer aluminium silicate; The polymeric aluminum molysite adopts aluminium iron polychloride, PAFS and polymeric aluminium ferrum silicate; Be mixed with 5%～30% polymeric ferric salt or ferric-polysilicate salt in complex coagulation/flocculation agent based on polyaluminium salts.
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| CN201010039157A CN101767854A (en) | 2010-01-13 | 2010-01-13 | Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills |
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| CN201010039157A CN101767854A (en) | 2010-01-13 | 2010-01-13 | Coagulating/flocculating method for processing nanofiltration concentrate reject stream of early percolate at refuse landfills |
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| CN101767854A true CN101767854A (en) | 2010-07-07 |
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103910419A (en) * | 2013-01-07 | 2014-07-09 | 北京大学 | Method for treating landfill leachate membrane concentration solution by using covalent bond composite flocculant |
| CN104402100A (en) * | 2014-10-16 | 2015-03-11 | 天津科技大学 | Preparation method and applications of inorganic flocculant adopting vermiculite mineral as raw material |
| CN110330147A (en) * | 2019-07-29 | 2019-10-15 | 上海电力大学 | Rapid treatment method for sludge landfill leachate |
| CN111762791A (en) * | 2020-05-21 | 2020-10-13 | 北京市城市管理研究院 | Method for preparing flocculating agent by utilizing furnace slag and application thereof |
| CN113371804A (en) * | 2021-07-27 | 2021-09-10 | 新疆水佳源科技有限公司 | Efficient coagulant aid suitable for sewage treatment system and preparation method thereof |
| CN113955879A (en) * | 2021-11-09 | 2022-01-21 | 遵义师范学院 | Flocculation method for treating landfill leachate |
| CN114573300A (en) * | 2022-03-25 | 2022-06-03 | 中国建筑科学研究院有限公司 | Domestic garbage leachate membrane concentrated solution, curing material for evaporating mother liquor and application of curing material |
-
2010
- 2010-01-13 CN CN201010039157A patent/CN101767854A/en active Pending
Non-Patent Citations (1)
| Title |
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| 李淑芬等: "铝系聚合絮凝剂处理垃圾渗滤液的特性研究", 《苏州科技学院学报（工程技术版）》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103910419A (en) * | 2013-01-07 | 2014-07-09 | 北京大学 | Method for treating landfill leachate membrane concentration solution by using covalent bond composite flocculant |
| CN103910419B (en) * | 2013-01-07 | 2016-02-10 | 北京大学 | A kind of method utilizing covalent linkage composite flocculation agent treating refuse percolation liquid membrane concentrated solution |
| CN104402100A (en) * | 2014-10-16 | 2015-03-11 | 天津科技大学 | Preparation method and applications of inorganic flocculant adopting vermiculite mineral as raw material |
| CN104402100B (en) * | 2014-10-16 | 2016-10-26 | 天津科技大学 | The preparation method and applications of the inorganic flocculating agent with vermiculite mineral as raw material |
| CN110330147A (en) * | 2019-07-29 | 2019-10-15 | 上海电力大学 | Rapid treatment method for sludge landfill leachate |
| CN111762791A (en) * | 2020-05-21 | 2020-10-13 | 北京市城市管理研究院 | Method for preparing flocculating agent by utilizing furnace slag and application thereof |
| CN113371804A (en) * | 2021-07-27 | 2021-09-10 | 新疆水佳源科技有限公司 | Efficient coagulant aid suitable for sewage treatment system and preparation method thereof |
| CN113955879A (en) * | 2021-11-09 | 2022-01-21 | 遵义师范学院 | Flocculation method for treating landfill leachate |
| CN114573300A (en) * | 2022-03-25 | 2022-06-03 | 中国建筑科学研究院有限公司 | Domestic garbage leachate membrane concentrated solution, curing material for evaporating mother liquor and application of curing material |
| CN114573300B (en) * | 2022-03-25 | 2022-11-25 | 中国建筑科学研究院有限公司 | Domestic garbage leachate membrane concentrated solution, curing material for evaporation mother solution and application of curing material |
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Application publication date: 20100707 |