CN109081510A - A kind of leachate integrated treating method and apparatus of small towns refuse transfer station - Google Patents
A kind of leachate integrated treating method and apparatus of small towns refuse transfer station Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
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- 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
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F1/722—Oxidation by peroxides
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2305/026—Fenton's reagent
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C02F3/1268—Membrane bioreactor systems
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Abstract
The invention proposes a kind of leachate integrated treating method and apparatus of small towns refuse transfer station can be percolated liquid measure flexible modulation treating capacity and processing time according to small-sized rubbish transfer station using integrated process；Using the method for hydrolysis acidification system, MBR membrane bio-reaction system in conjunction with Fenton oxidation system, biodegrade is combined with chemical oxidation, realizes the reduction of process costs；Using first with microbial degradation organic matter, recycle the OH of strong oxidizing property that macromolecular hardly degraded organic substance is degraded to CO2And H2The method of O fundamentally solves the problems, such as landfill leachate advanced treating.
Description
Technical field
The present invention relates to high concentration wastewater treatment field more particularly to a kind of leachate integrated places of small towns refuse transfer station
Manage method and apparatus.
Background technique
China in 2018 has carried out small towns residents in rural community in China and has collected transhipment disposing task, establishes
The garbage disposal delivery system of " family collection, village are received, small towns is transported, county's processing ".The yield of rural area house refuse is less, divides
Cloth is wide, and effectively to collect small towns house refuse, small-sized rubbish transfer station has been built in each small towns.Transfer station generate percolate include
Two parts, a part are the percolate stoste that household garbage-compressing generates, and another part is operating area ground flushing sewage.By
In rural area, resident is sparsely populated, and small towns refuse transfer station transhipment amount is few, therefore the diafiltration liquid measure generated is small.Existing rubbish
Transfer station is concentrated mainly on transhipment and measures big urban area, at present both at home and abroad to rural area small-sized rubbish transfer station percolate
Treatment research is less.
Chinese patent CN101708917A discloses rubbish leachate integrated treatment device and method, the device of the invention
It is efficient ammonia nitrogen stripping tower+eddy flow grid coagulation+inclined plate (pipe) precipitating+charcoal filter bed+SMBR reactor group into collection with method
The advantage in garbage leachate treatment process has been tied, has solved the problems, such as that the processing of landfill leachate is difficult costly, but the technique
Device is complicated, volume is big, is not suitable for handling a small amount of percolates, and the technique does not carry out advanced treating to percolate,
Can not degrade the organic matter of difficult for biological degradation in percolate.
Summary of the invention
In view of this, having the invention proposes a kind of leachate integrated treating method and apparatus of small towns refuse transfer station
Effect solves the problems, such as that small towns refuse transfer station percolate treating capacity is small, and handles diafiltration using the biochemical processing method combined
Liquid solves the problems, such as landfill leachate advanced treating.
The technical scheme of the present invention is realized as follows:
On the one hand, the present invention provides a kind of leachate integrated processing methods of small towns refuse transfer station, including following step
Suddenly,
Refuse transfer station leachate collection to flocculation sedimentation tank (1) is adjusted pH to 7.0~9.0 by S1, adds flocculant
Carry out flocculation sedimentation；
S2, imports hydrolysis acidification pool (2) for flocculation sedimentation tank (1) supernatant, and stirring converts large biological molecule substance to
It is easy to the small-molecule substance degraded；
The water outlet of step S2 is imported MBR membrane bioreactor (3) by S3, will be seeped under aerobic conditions using activated sludge
Organic nitrogen is converted to nitrate in filtrate, is decomposed nitrate reduction using activated sludge in anoxia condition, processed infiltration
Filtrate is filtered by MBR film, obtains filtered fluid；
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank (4), adjust pH to 3.0~5.0, are added sub-
Ferrous solution and hydrogen peroxide carry out Fenton oxidation reaction；
Fenton oxidation reactor tank (4) are discharged and import sedimentation basin (5) by S5, adjust pH to 8.0~10.0, and flocculant is added,
It is precipitated；
S6, imports filtering ponds (6) for sedimentation basin (5) supernatant, and clear water is collected after ultrafiltration membrance filter to producing pond (7).
On the basis of above technical scheme, it is preferred that in the step S1, flocculant uses PAC and PAM, with configuration
Mass concentration 10% is counted, and PAC, which is added, compares 5L/m3~15L/m3；In terms of configuration quality concentration 0.2%, PAM, which is added, compares 5L/m3~
15L/m3, coagulation dosing incorporation time 10min~20min, the flocculation sedimentation time is no less than 3h.
On the basis of above technical scheme, it is preferred that in the step S2, mixing plant output power density is 4-
8W/m3, hydrolytic acidification time is 10h~12h.
On the basis of above technical scheme, it is preferred that in step S3, hydrolysis acidification pool (2) water outlet imports denitrification zone
(31), Fenton oxidation reactor tank (4) is imported afterwards then in turn through nitrification zone (32) and MBR film filtering area (33), wherein to anti-
To nitrification zone (32), the sludge circulation generated to denitrification zone (31) is back to the nitrate circulating reflux that nitrification zone (31) generates
Nitrification zone (32).Still more preferably, denitrification zone (31) residence time is no less than 1d, and nitrification zone (32) residence time is many
In 4.0d, nitrate reflux ratio 4~10, return sludge ratio 3~8 is aerated air quantity 1m3/ min~2m3/min。
On the basis of above technical scheme, it is preferred that in step S4, the Fenton oxidation reaction time is no less than 2h；Step
In S5, the flocculation sedimentation time is not less than 1h.
On the basis of above technical scheme, it is preferred that in step S6, filtering ponds (6) water inlet flow control is in 0.5m/
S~1.5m/s, water outlet flow control use KJ-MBR2-13-PVDF type dry film in 1.0m/s~2.0m/s, ultrafiltration membrane.
Second aspect, the present invention provides a kind of leachate integrated processing units of small towns refuse transfer station, including successively
The flocculation sedimentation tank (1) of connection, hydrolysis acidification pool (2), MBR membrane bioreactor (3), Fenton oxidation reactor tank (4), sedimentation basin
(5), filtering ponds (6) and production pond (7), wherein flocculation sedimentation tank (1) selectivity is externally connected to sour storage container, alkali stores and holds
Device, PAC storage container and PAM storage container, it is molten that Fenton oxidation reactor tank (4) selectivity is externally connected to sour storage container, ferrous iron
Liquid storage container and hydrogen peroxide storage container, filtering ponds (6) are interior to be arranged ultrafiltration membrane, and sedimentation basin (5) selectivity externally deposit by connection alkali
Storage container and PAM storage container.
On the basis of above technical scheme, it is preferred that the MBR membrane bioreactor (3) include denitrification zone (31),
Activated sludge, hydrolysis acidification pool is arranged in nitrification zone (32) and MBR film filtering area (33) in denitrification zone (31) and nitrification zone (32)
(2) denitrification zone (31) are connected to, denitrification zone (31) supernatant regional connectivity nitrification zone (32), nitrification zone (32) supernatant region
It is connected to MBR film filtering area (33), MBR film filtering area (33) exhalant region is connected to Fenton oxidation reactor tank (4).It is further preferred that
Nitrate return flow line and sludge reflux channel are provided between the denitrification zone (31) and nitrification zone (32).
Refuse transfer station leachate integrated treating method and apparatus in small towns of the invention have compared with the existing technology with
It is lower the utility model has the advantages that
(1) integrated process is used, liquid measure flexible modulation treating capacity and place can be percolated according to small-sized rubbish transfer station
The time is managed, occupied area is small, and it is easy to operate, convenient for management；
(2) method of hydrolysis acidification system, MBR membrane bio-reaction system in conjunction with Fenton oxidation system is used, it will be biological
Degradation combines with chemical oxidation, and low energy consumption, without secondary pollution；
(3) using first with microbial degradation organic matter, recycle the OH of strong oxidizing property that macromolecular is difficult to degrade organic
Object is degraded to CO2And H2The method of O fundamentally solves the problems, such as landfill leachate advanced treating.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of refuse transfer station leachate integrated processing method in small towns of the invention；
Fig. 2 is the connection relationship diagram of refuse transfer station leachate integrated processing unit in small towns of the invention.
Specific embodiment
Below in conjunction with embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only some embodiments of the invention, rather than whole embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
For the deficiency of current small-sized rubbish transfer station percolate further treatment technique, the present invention provides a kind of small towns rubbish
The leachate integrated treating method and apparatus of rubbish transfer station efficiently solves the depth of small towns small-sized rubbish transfer station percolate
Reason problem, and the technique uses integrated device, and design treatment amount is 5m3/ d, can be according to small-sized transfer station percolate
Treating capacity flexible arrangement handles the time, and utilization rate of equipment and installations is high, easy to operate.
As shown in Figure 1, in conjunction with Fig. 2, refuse transfer station leachate integrated processing method in small towns of the invention, including it is following
Step,
Refuse transfer station leachate collection to flocculation sedimentation tank 1 is adjusted pH to 7.0~9.0 by S1, addition flocculant into
Row flocculation sedimentation.Wherein, flocculation sedimentation tank 1, selectivity be externally connected to sour storage container, alkali storage container, PAC storage container and
PAM storage container, specifically, setting pH meter and agitating device in flocculation sedimentation tank 1.Refuse transfer station percolate collect first to
Flocculation sedimentation tank 1 first passes through pH meter detection pH value, and the addition acid or alkali of reselection are adjusted between pH to 7.0~9.0, then
Flocculant PAC, PAM is added and carries out flocculation sedimentation, flocculation sedimentation area mainly removes the impurity such as oil removal, silt, precipitates generation
Sludge is discharged into sludge concentration device 8.Wherein, PAC, which is added, compares 5L/m3~15L/m3(in terms of configuration quality concentration 10%), PAM are thrown
Add and compares 5L/m3~15L/m3(in terms of configuration quality concentration 0.2%), coagulation dosing incorporation time 10min~20min, design stop
Time is no less than 1h.This stage CODcrRemoval rate is 15%~20%, BOD5Removal rate is that 10%~15%, SS removal rate is
45%~55%.
1 supernatant of flocculation sedimentation tank is imported hydrolysis acidification pool 2 by S2, and stirring converts large biological molecule substance to and is easy to
The small-molecule substance of degradation.Wherein, hydrolysis acidification pool 2, interior agitating device.Supernatant enters hydrolysis acidification pool after flocculation sedimentation
2, the hydrolysis acidification stage mainly converts large biological molecule substance to the small-molecule substance for being easy to degrade, and it is biochemical to improve percolate
Property, predominantly subsequent MBR membrane bioreactor 3 provides condition.Specifically, the percolate hydrolysis acidification residence time is designed as 10h
~12h, by every 4W/m3~8W/m3Power density matches mixing plant.This stage CODcrRemoval rate is 30%~40%, BOD5
Removal rate is 25%~35%, and ammonia nitrogen removal frank is 45%~55%, and nitrogen removal rate is that 50%~60%, SS removal rate is
65%~75%.
The water outlet of step S2 is imported MBR membrane bioreactor 3 by S3, will be percolated under aerobic conditions using activated sludge
Organic nitrogen is converted to nitrate in liquid, is decomposed nitrate reduction using activated sludge in anoxia condition, processed diafiltration
Liquid is filtered by MBR film, obtains filtered fluid.Wherein, MBR membrane bioreactor 3, including denitrification zone 31, nitrification zone 32
With MBR film filtering area 33, activated sludge is set in denitrification zone 31 and nitrification zone 32, hydrolysis acidification pool 2 is connected to denitrification zone 31,
31 supernatant regional connectivity nitrification zone 32 of denitrification zone, 32 supernatant regional connectivity MBR film filtering area 33 of nitrification zone, MBR film mistake
It filters 33 exhalant region of area and is connected to Fenton oxidation reactor tank 4.Specifically, setting aerator 34 and jet pump in the nitrification zone 32
35.Agitating device is set in the denitrification zone 31, DO analyzer is set in nitrification zone 32.Specifically, the denitrification zone 31
Nitrate return flow line and sludge reflux channel are provided between nitrification zone 32.
Wherein, denitrification zone 31, under anoxic conditions will be in 32 phegma of nitrification zone using 31 activated sludge of denitrification zone
Nitrate reduction decompose.
Organic nitrogen in percolate is converted to nitric acid using 32 activated sludge of nitrification zone under aerobic conditions by nitrification zone 32
Salt is then refluxed for denitrification zone 31 being handled.
MBR film filtering area 33, after the percolate that phase process is crossed through front enters built-in membrane bioreactor, percolate leaching
No membrane module, the activated sludge outside most pollutant envelope in mixed liquor decomposes, and treated water is inside membrane module
Discharge.
Specifically, 3 inlet flow-patterm 5~7 of MBR membrane bioreactor, 31 residence time of denitrification zone are no less than 1d, nitrification zone 32
Residence time is no less than 4.0d, nitrate reflux ratio 4~10, and return sludge ratio 3~8 is aerated air quantity 1m3/ min~2m3/min。
This stage CODcrRemoval rate is 85%~95%, BOD5Removal rate is 96%~98%, and ammonia nitrogen removal frank is 95%~98%,
Nitrogen removal rate is that 85%~95%, SS removal rate is 99%~100%.
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank 4, adjust pH to 3.0~5.0, are added ferrous
Solution and hydrogen peroxide carry out Fenton oxidation reaction.Specifically, Fenton oxidation reactor tank 4, interior agitating device, pH meter, ORP are surveyed
Determine instrument.Specifically, 4 selectivity of Fenton oxidation reactor tank is externally connected to sour storage container, ferrous iron solution storage container and hydrogen peroxide
Storage container.Through there are the organic matter of difficult for biological degradation, water outlet flows into Fenton in treated the water outlet of MBR membrane bioreactor 3
Macromolecular hardly degraded organic substance can be degraded mineralising as CO by oxidation reaction tank 4, the OH of strong oxidizing property2And H2O.When Fenton's reaction
Between no less than 2h.
Fenton oxidation reactor tank 4 is discharged and imports sedimentation basin 5 by S5, adjusts pH to 8.0~10.0, and flocculant is added, and carries out
Precipitating.Specifically, 5 selectivity of sedimentation basin is externally connected to alkali storage container and PAM storage container.Specifically, setting in sedimentation basin 5
Agitating device.Contain Fe in zoneofoxidation water outlet3+, after water outlet enters sedimentation basin 5, pH is reconciled, the further coagulating sedimentation of PAM is added, goes
Except water pollutant.Match agitating device, chemicals dosing plant in settling zone.For the control of flocculation sedimentation process pH value 8.0~10.0, flocculation is heavy
The time form sediment greater than 1h.This stage CODcrRemoval rate is 75%~80%, BOD5Removal rate is 15%~20%, ammonia nitrogen removal frank
It is 5%~10%, nitrogen removal rate is that 5%~10%, SS increased.
S6, imports filtering ponds 6 for 5 supernatant of sedimentation basin, and clear water is collected after ultrafiltration membrance filter to production pond 7.Specifically,
Filtering ponds 6, built-in ultrafiltration membrane.Waste water can generate flocculation sedimentation after Fenton oxidation reactor tank 4, and waste water reaches after ultrafiltration membrance filter
Mark discharge.System water sucking mouth flow control is in 0.5m/s~1.5m/s, and water outlet flow control is in 1.0m/s~2.0m/s.This
Stage SS removal rate is 98%~99%.This system uses KJ-MBR2-13-PVDF type dry film, film process ability 10m3/ d~
11m3/ d, outer dimension 2.3 × 1.6 × 2.0.
After above-mentioned reaction, it is finally discharged CODCr≤ 500, BOD5≤ 300, SS≤400, pH6~9, " sewage is comprehensive for satisfaction
Close discharge standard " (GB8978-1996) three-level discharge standard.
Sludge concentration device 8, flocculation sedimentation tank 1, hydrolysis acidification pool 2, denitrification zone 31, nitrification zone 32 and the filtering of MBR film
Area 33, Fenton oxidation reactor tank 4, sedimentation basin 5 and 6 sludge outlet of filtering ponds are respectively communicated with sludge concentration device 8.In sludge-tank
Sludge it is concentrated after periodically outward transport.
Below in conjunction with specific embodiment, it is further described refuse transfer station leachate integrated processing in small towns of the invention
Method and apparatus.
Embodiment 1
Refuse transfer station leachate quality is analyzed, determines that influent quality analysis data are as shown in table 1:
1 influent quality of table
Refuse transfer station leachate collection to flocculation sedimentation tank 1 is detected pH value by pH meter by S1, and be added acid solution or
Person's lye adjusts pH to 7.0, in terms of configuration quality concentration 0.2%, adds 5L/m3PAC；In terms of configuration quality concentration 10%, add
Add 5L/m3PAM carries out flocculation sedimentation, flocculation sedimentation 3h, and the sludge of generation is collected to sludge concentration device 8 and is further processed.Through
Detection, this stage CODcrRemoval rate is 18%, BOD5Removal rate is that 10%, SS removal rate is 45%.Flocculation sedimentation tank 1 generates
Sludge collect to sludge concentration device 8 and be further processed.
1 supernatant of flocculation sedimentation tank is imported hydrolysis acidification pool 2, by every 4W/m by S23Power density matches mixing plant,
10h is stirred, the sludge of generation is collected to sludge concentration device 8 and is further processed.This stage CODcrRemoval rate is 32%, BOD5
Removal rate is 27%, ammonia nitrogen removal frank 45%, nitrogen removal rate 50%, and SS removal rate is 68%.
The water outlet of step S2 is imported denitrification zone 31 by S3, and under anoxic conditions, stirring carries out denitrification processing, time
1d；Then, water outlet is imported into nitrification zone 32, under aerobic conditions, stirring carries out nitrification processing 4.0d, wherein the stage generates
Nitrate be back to denitrification zone 31, reflux ratio 4；The sludge reflux that the stage generates is to denitrification zone 31, reflux ratio 3；It adopts
It is aerated with aerator, is aerated air quantity 1m3/min；Jet-loop is carried out using jet pump；It is crossed through front phase process
Percolate enters MBR film filtering area 33 and is filtered.This stage CODcrRemoval rate is 87%, BOD5Removal rate is 96%, ammonia
Nitrogen removal efficiency is 95%, nitrogen removal rate 86%, and SS removal rate is 99%.The sludge of generation is collected to sludge concentration device 8
It is further processed.
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank 4, adjust pH to 3.0, be added ferrous iron solution and
Hydrogen peroxide carries out Fenton oxidation reaction, and the reaction time is no less than 2h, and the sludge of generation is collected further to sludge concentration device 8
Processing.
Fenton oxidation reactor tank 4 is discharged and imports sedimentation basin 5 by S5, adjusts pH to 8.0, and PAM is added, and carries out coagulating sedimentation,
Flocculation sedimentation time 1h, the sludge of generation are collected to sludge concentration device 8 and are further processed.This stage CODcrRemoval rate is
75%, BOD5Removal rate is 16%, and ammonia nitrogen removal frank 5%, nitrogen removal rate 5%, SS increased.
5 supernatant of sedimentation basin is imported filtering ponds 6 by S6, collects clear water extremely after the filtering of KJ-MBR2-13-PVDF type dry film
Pond 7 or qualified discharge are produced, system water sucking mouth flow control is in 0.5m/s, and water outlet flow control is in 1.0m/s, filtering ponds 6
The sludge of interior generation is collected to sludge concentration device 8 and is further processed.This stage SS removal rate is 99%.
After above-mentioned reaction, it is finally discharged CODCr≤ 500, BOD5≤ 300, SS≤400, pH6~9, " sewage is comprehensive for satisfaction
Close discharge standard " (GB8978-1996) three-level discharge standard.
Embodiment 2
Refuse transfer station leachate quality is analyzed, determines that influent quality analysis data are as shown in table 2:
2 influent quality of table
Refuse transfer station leachate collection to flocculation sedimentation tank 1 is detected pH value by pH meter by S1, and be added acid solution or
Person's lye adjusts pH to 8.0, in terms of configuration quality concentration 0.2%, adds 10L/m3PAC；In terms of configuration quality concentration 10%,
Add 10L/m3PAM carries out flocculation sedimentation, flocculation sedimentation 4h, and the sludge of generation is collected to sludge concentration device 8 and is further processed.
Through detecting, this stage CODcrRemoval rate is 22%, BOD5Removal rate is that 15%, SS removal rate is 55%.Flocculation sedimentation tank 1 produces
Raw sludge is collected to sludge concentration device 8 and is further processed.
1 supernatant of flocculation sedimentation tank is imported hydrolysis acidification pool 2, by every 6W/m by S23Power density matches mixing plant,
11h is stirred, the sludge of generation is collected to sludge concentration device 8 and is further processed.This stage CODcrRemoval rate is 34%, BOD5
Removal rate is 28%, ammonia nitrogen removal frank 48%, nitrogen removal rate 52%, and SS removal rate is 70%.
The water outlet of step S2 is imported denitrification zone 31 by S3, and under anoxic conditions, stirring carries out denitrification processing, time
1.5d；Then, water outlet is imported into nitrification zone 32, under aerobic conditions, stirring carries out nitrification processing 4.5d, wherein the stage produces
Raw nitrate is back to denitrification zone 31, reflux ratio 7；The sludge reflux that the stage generates is to denitrification zone 31, reflux ratio 5；
It is aerated using aerator, is aerated air quantity 1.5m3/min；Jet-loop is carried out using jet pump；Through front phase process
The percolate crossed enters MBR film filtering area 33 and is filtered.This stage CODcrRemoval rate is 89%, BOD5Removal rate is
97%, ammonia nitrogen removal frank 96%, nitrogen removal rate 90%, SS removal rate is 99.5%.The sludge of generation is collected to sludge
Enrichment facility 8 is further processed.
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank 4, adjust pH to 4.0, be added ferrous iron solution and
Hydrogen peroxide, carries out Fenton oxidation reaction, reaction time 2.5h, and the sludge of generation is collected to sludge concentration device 8 and is further processed.
Fenton oxidation reactor tank 4 is discharged and imports sedimentation basin 5 by S5, adjusts pH to 9.0, and PAM is added, and carries out coagulating sedimentation,
Flocculation sedimentation time 2h, the sludge of generation are collected to sludge concentration device 8 and are further processed.This stage CODcrRemoval rate is
77%, BOD5Removal rate is 16%, and ammonia nitrogen removal frank 7%, nitrogen removal rate 6%, SS increased.
5 supernatant of sedimentation basin is imported filtering ponds 6 by S6, collects clear water extremely after the filtering of KJ-MBR2-13-PVDF type dry film
Pond 7 or qualified discharge are produced, system water sucking mouth flow control is in 1.0m/s, and water outlet flow control is in 1.5m/s, filtering ponds 6
The sludge of interior generation is collected to sludge concentration device 8 and is further processed.This stage SS removal rate is 99%.
After above-mentioned reaction, it is finally discharged CODCr≤ 500, BOD5≤ 300, SS≤400, pH6~9, " sewage is comprehensive for satisfaction
Close discharge standard " (GB8978-1996) three-level discharge standard.
Embodiment 3
Refuse transfer station leachate quality is analyzed, determines that influent quality analysis data are as shown in table 3:
3 influent quality of table
Refuse transfer station leachate collection to flocculation sedimentation tank 1 is detected pH value by pH meter by S1, and be added acid solution or
Person's lye adjusts pH to 9.0, in terms of configuration quality concentration 0.2%, adds 15L/m3PAC；In terms of configuration quality concentration 10%,
Add 15L/m3PAM carries out flocculation sedimentation, flocculation sedimentation 5h, and the sludge of generation is collected to sludge concentration device 8 and is further processed.
Through detecting, this stage CODcrRemoval rate is 20%, BOD5Removal rate is that 10%, SS removal rate is 50%.Flocculation sedimentation tank 1 produces
Raw sludge is collected to sludge concentration device 8 and is further processed.
1 supernatant of flocculation sedimentation tank is imported hydrolysis acidification pool 2, by every 8W/m by S23Power density matches mixing plant,
12h is stirred, the sludge of generation is collected to sludge concentration device 8 and is further processed.This stage CODcrRemoval rate is 35%, BOD5
Removal rate is 31%, ammonia nitrogen removal frank 52%, nitrogen removal rate 56%, and SS removal rate is 72%.
The water outlet of step S2 is imported denitrification zone 31 by S3, and under anoxic conditions, stirring carries out denitrification processing, time
2d；Then, water outlet is imported into nitrification zone 32, under aerobic conditions, stirring carries out nitrification processing 5.0d, wherein the stage generates
Nitrate be back to denitrification zone 31, reflux ratio 10；The sludge reflux that the stage generates is to denitrification zone 31, reflux ratio 8；It adopts
It is aerated with aerator, is aerated air quantity 2m3/min；Jet-loop is carried out using jet pump；It is crossed through front phase process
Percolate enters MBR film filtering area 33 and is filtered.This stage CODcrRemoval rate is 93%, BOD5Removal rate is 98%, ammonia
Nitrogen removal efficiency is 98%, nitrogen removal rate 92%, and SS removal rate is 99.5%.The sludge of generation is collected to sludge concentration device
8 are further processed.
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank 4, adjust pH to 5.0, be added ferrous iron solution and
Hydrogen peroxide, carries out Fenton oxidation reaction, reaction time 3h, and the sludge of generation is collected to sludge concentration device 8 and is further processed.
Fenton oxidation reactor tank 4 is discharged and imports sedimentation basin 5 by S5, adjusts pH to 10.0, and PAM is added, and it is heavy to carry out coagulation
It forms sediment, flocculation sedimentation time 3h, the sludge of generation is collected to sludge concentration device 8 and is further processed.This stage CODcrRemoval rate
For 79%, BOD5Removal rate is 20%, and ammonia nitrogen removal frank 8%, nitrogen removal rate 8%, SS increased.
5 supernatant of sedimentation basin is imported filtering ponds 6 by S6, collects clear water extremely after the filtering of KJ-MBR2-13-PVDF type dry film
Pond 7 or qualified discharge are produced, system water sucking mouth flow control is in 1.5m/s, and water outlet flow control is in 2.0m/s, filtering ponds 6
The sludge of interior generation is collected to sludge concentration device 8 and is further processed.This stage SS removal rate is 98%.
After above-mentioned reaction, it is finally discharged CODCr≤ 500, BOD5≤ 300, SS≤400, pH6~9, " sewage is comprehensive for satisfaction
Close discharge standard " (GB8978-1996) three-level discharge standard.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of leachate integrated processing method of small towns refuse transfer station, it is characterised in that: include the following steps,
Refuse transfer station leachate collection to flocculation sedimentation tank (1) is adjusted pH to 7.0~9.0 by S1, and addition flocculant carries out
Flocculation sedimentation；
S2, imports hydrolysis acidification pool (2) for flocculation sedimentation tank (1) supernatant, and stirring converts large biological molecule substance to and is easy to
The small-molecule substance of degradation；
The water outlet of step S2 is imported MBR membrane bioreactor (3), utilizes activated sludge by percolate under aerobic conditions by S3
Middle organic nitrogen is converted to nitrate, is decomposed nitrate reduction using activated sludge in anoxia condition, processed percolate
Biodegrade and filtering are carried out by built-in MBR film, obtains filtered fluid；
S4, the filtered fluid that step S3 is obtained import Fenton oxidation reactor tank (4), adjust pH to 3.0~5.0, are added ferrous molten
Liquid and hydrogen peroxide carry out Fenton oxidation reaction；
Fenton oxidation reactor tank (4) are discharged and import sedimentation basin (5) by S5, adjust pH to 8.0~10.0, and flocculant is added, and carry out
Precipitating；
S6, imports filtering ponds (6) for sedimentation basin (5) supernatant, and clear water is collected after ultrafiltration membrance filter to producing pond (7).
2. refuse transfer station leachate integrated processing method in small towns as described in claim 1, it is characterised in that: the step
In S1, flocculant uses PAC and PAM, and in terms of configuration quality concentration 10%, PAC, which is added, compares 5L/m3~15L/m3；With configuration quality
Concentration 0.2% is counted, and PAM, which is added, compares 5L/m3~15L/m3, coagulation dosing incorporation time 10min~20min, the flocculation sedimentation time is not
Less than 1h.
3. refuse transfer station leachate integrated processing method in small towns as described in claim 1, it is characterised in that: the step
In S2, mixing plant output power density is 4W/m3~8W/m3, hydrolytic acidification time is 4h~12h.
4. refuse transfer station leachate integrated processing method in small towns as described in claim 1, it is characterised in that: step S3
In, hydrolysis acidification pool (2) water outlet imports denitrification zone (31), then in turn through nitrification zone (32) and MBR film filtering area (33)
Import Fenton oxidation reactor tank (4) afterwards, wherein the nitrate circulating reflux that denitrification zone (31) are generated to nitrification zone (32),
The sludge circulation generated to denitrification zone (31) is back to nitrification zone (32).
5. refuse transfer station leachate integrated processing method in small towns as claimed in claim 4, it is characterised in that: denitrification zone
(31) residence time is no less than 1d, and nitrification zone (32) residence time is no less than 4.0d, nitrate reflux ratio 4~10, sludge reflux
Than 3~8, it is aerated air quantity 1m3/ min~2m3/min。
6. refuse transfer station leachate integrated processing method in small towns as described in claim 1, it is characterised in that: step S4
In, the Fenton oxidation reaction time is no less than 2h；In step S5, the flocculation sedimentation time is not less than 1h.
7. refuse transfer station leachate integrated processing method in small towns as described in claim 1, it is characterised in that: step S6
In, filtering ponds (6) water inlet flow control surpasses in 0.5m/s~1.5m/s, water outlet flow control in 1.0m/s~2.0m/s
Filter membrane uses KJ-MBR2-13-PVDF type dry film.
8. a kind of leachate integrated processing unit of small towns refuse transfer station, it is characterised in that: the flocculation including being sequentially communicated is heavy
Shallow lake pond (1), hydrolysis acidification pool (2), MBR membrane bioreactor (3), Fenton oxidation reactor tank (4), sedimentation basin (5), filtering ponds
(6) and pond (7) are produced, wherein flocculation sedimentation tank (1) selectivity is externally connected to sour storage container, alkali storage container, PAC storage
Container and PAM storage container, Fenton oxidation reactor tank (4) selectivity are externally connected to sour storage container, ferrous iron solution storage container
With hydrogen peroxide storage container, filtering ponds (6) are interior to be arranged ultrafiltration membrane, and sedimentation basin (5) selectivity is externally connected to alkali storage container and PAM
Storage container.
9. refuse transfer station leachate integrated processing unit in small towns as claimed in claim 8, it is characterised in that: the MBR
Membrane bioreactor (3) includes denitrification zone (31), nitrification zone (32) and MBR film filtering area (33), denitrification zone (31) and nitre
Change and activated sludge is set in area (32), hydrolysis acidification pool (2) is connected to denitrification zone (31), and denitrification zone (31) supernatant region connects
Logical nitrification zone (32), nitrification zone (32) supernatant regional connectivity MBR film filtering area (33), MBR film filtering area (33) exhalant region connect
Logical Fenton oxidation reactor tank (4).
10. refuse transfer station leachate integrated processing unit in small towns as claimed in claim 9, it is characterised in that: described anti-
Nitrate return flow line and sludge reflux channel are provided between nitrification zone (31) and nitrification zone (32).
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