CN105948401A - Combined technique for treating refuse leachate membrane concentrate - Google Patents
Combined technique for treating refuse leachate membrane concentrate Download PDFInfo
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- CN105948401A CN105948401A CN201610465217.9A CN201610465217A CN105948401A CN 105948401 A CN105948401 A CN 105948401A CN 201610465217 A CN201610465217 A CN 201610465217A CN 105948401 A CN105948401 A CN 105948401A
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- concentrated solution
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- mbbr
- anoxia
- fenton oxidation
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Classifications
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- C—CHEMISTRY; METALLURGY
- 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
-
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a combined technique for treating a refuse leachate membrane concentrate. The technique comprises the following steps: carrying out Fenton oxidation on the concentrate, carrying out flocculating settling, and carrying out anoxic/aerobic MBBR (moving bed biofilm reaction). The concentrate is subjected to Fenton oxidation treatment, so that high-polymer and high-molecular organic pollutants which can not be easily degraded by microbes are decomposed into small-molecular compounds, the BOD5/CODCr value is enhanced, and the biodegradability of the concentrate is enhanced, thereby providing favorable conditions for further degrading pollutants by microbes in the subsequent anoxic/aerobic MBBR. Since the Fenton oxidation+flocculating settling process has favorable removal effects on organic matters but has unobvious removal effects on NH4<+>-N, the subsequent anoxic/aerobic MBBR which has favorable removal effects on NH4<+>-N is utilized to further degrade the organic matters. The combined technique is flexible in the operating mode, can thoroughly remove organic matters and NH4<+>-N, and does not generate secondary pollution.
Description
Technical field
The present invention relates to Technology of High Concentration OrganicWastewater Treatment field, be specifically related at a kind of rubbish percolation liquid membrane concentrated solution
The group technology of reason.
Background technology
In city house refuse treatment method, landfill method is the most most widely used current technology of garbage disposal,
Inevitably producing percolate during landfill, this percolate is a kind of high concentration with acute and chronic dual toxicity
Waste water, percolate is once revealed, and surface water and subsoil water are had great potential hazard, is acknowledged as high environment dirty
Dye risk organic wastewater.
At present, refuse leachate treatment technology aspect has been carried out substantial amounts of correlational study by the most many scholars,
Along with 2008 China " household refuse landfill sites Environmental capacity standard " (GB16889-2008) promulgation, to percolate
Process is had higher requirement, and the membrane technology such as NF, RO is more and more used in landfill leachate treatment, is used for drinking
It is increasingly becoming China's refuse landfill with the membrane technology of water process rank and processes the mainstream technology route of percolate.But
This membrane technology has simply functioned only as physical filtering effect, when percolate is after film processes, produces the same of clear water
Time, also can produce 8～30% high concentrated organic wastewater, referred to as " concentrated solution ".Extremely low (the usual BOD of concentrated solution biodegradability5/
CODCr＜ 0.1), its Main Ingredients and Appearance is Humus material, in brownish black, has high CODCr, high NH4 +-N and containing a large amount of
The feature such as inorganic ions, therefore, during secondary pollution concentrated solution has become current Treatment of landfill leachate by membrane
One unusual stubborn problem.
If concentrated solution is directly discharged in natural environment, can be to the ecological ring of the peripheries such as soil, subsoil water, surface water
Border and people's health produce high risks；If a large amount of concentrated solutions are directly discharged into municipal wastewater pipe network, too high total dissolved solid meeting
Affect the normal activity of activated sludge.Along with membrane technology is increasingly widely applied in China's landfill leachate treatment,
The membrance concentration liquid produced becomes problem demanding prompt solution.Therefore develop effective percolate concentration liquid treatment technology to show
Obtain particularly important.
At present, method, Membrane Materials method, evaporation are recharged for the processing method that rubbish percolation liquid membrane concentrated solution is common both at home and abroad
Method, combustion method, advanced oxidation processes etc..
(1) recharging method, recharging the essence of method is using the household refuse landfill sites life as with rubbish as main stuffing
Thing filter bed.The concentrated solution recharged passes through action of gravity, flows through Aerated Landfill Layers from top to bottom, and organic pollution therein is by rubbish
In Institute of Micro-biology degraded.For recharging process, hydraulic load, organic loading and recycling frequency are recharge process the heaviest
Three technical parameters wanted.
Germany is to use method of recharging to process the country of concentrated solution the earliest, starts to recharge reverse osmosis concentrated liquid to fill out from 1986
Burying field, result shows: on the basis of taking into full account the characteristic Design of landfill yard, uses after recharging process concentrated solution, and landfill yard is arranged
In the percolate gone out, major pollutants matter concentration does not occur significantly to change.But, many researcheres show, pushing away in time
Moving, the drawback recharged gradually manifests, and during recharging, current easily form short circuit so that the probability that subsoil water pollutes increases
Add；Buring layer moisture content increases, and easily causes differential settlement；Hardly degraded organic substance accumulation, salinity increase, electrical conductivity raises,
Cause film producing water ratio to decline even system can not run.
(2) Membrane Materials method, Membrane Materials is the membrane separating process that membrane technology combines with evaporation process, has an advantage in that distillation
Process is almost carried out at normal temperatures, and film both sides have only to maintain the suitable temperature difference, and equipment is simple, flexible and convenient operation, steams
Evaporate effective.Its shortcoming is that film is relatively costly, and distillating ventilating amount is little, due to the impact of the factor such as concentration polarization, temperature polarization, fortune
Row state labile.It addition, Membrane Materials is a process having phase transformation, the latent heat of vaporization makes heat utilization rate relatively low.
(3) evaporation, evaporation processes concentrated solution and refers at certain temperature and pressure, the most easily waving in concentrated solution
The process that the Component seperation sent out is gone out so that concentrated solution volume reduces 90%-98%.What application was more at present has mechanical Compression Evaporation
Method, submergence evaporation.Both technique all can encounter the etching problem of equipment in actual moving process, the main material of apparatus
Must be expensive resistant material, cause equipment manufacturing cost costliness and later maintenance costly, become process membrance concentration liquid
Major limiting factors.
(4) burning method, burning method is processing high concentrated organic waste liquid side as the effective minimizing of one, innoxious mode
Face has obtained relatively broad application.Conventional liquid waste incinerator mainly have liquid jet type incinerator, fluidized bed incinerator,
Rotation error.Burning method have occupation of land less, treatment effeciency is high, pollutant are abolished thoroughly and the advantage such as energy recycling, but
The initial investment of burning method is big, incineration technology controls complicated, operation level requirement height, and along with nuisance in burning process
The problem demanding prompt solutions such as discharge, coking and slagging and the body of heater corrosion of matter such as two English class material, these all limit burning
Method popularization and application in terms of membrance concentration liquid process.
(5) advanced oxidation processes, high-level oxidation technology is to have the hydroxyl radical free radical (OH) of Strong oxdiative ability and be to produce
Feature, under the reaction conditions such as High Temperature High Pressure, electricity, sound, photoirradiation, catalyst, makes persistent organic pollutants be oxidized to little point
Sub-material, is finally oxidized to carbon dioxide and water.Producing method according to free radical and the difference of reaction condition, can be classified as
Photochemical oxidation, sonochemical oxidation, ozone oxidation, electrochemical oxidation, Fenton oxidation etc..For Mu Qian, relative to the most several
Planting membrance concentration liquid treatment technology, high-level oxidation technology is the more excellent method processing rubbish membrance concentration liquid, and its feature is mainly: the highest
Effect, the speed of high-level oxidation technology degradation of organic substances is the fastest.2. product harmless, advanced oxidation processes is final for organic pollution oxygen
Chemical conversion carbon dioxide and water, thus reached the purpose of thorough removal COD.The most comparatively speaking, Financial cost is low, operability
By force, it is a kind of physical and chemical process, it is easy to be controlled by.But many research shows, although use advanced oxidation processes with
Coagulation sedimentation processes membrance concentration liquid good removal effect to Organic substance, but to NH4 +-N removal effect is inconspicuous.
When processing rubbish percolation liquid membrane concentrated solution, more or less there are some drawbacks, based on this in above several method
Reason, the mode that the present invention combines advanced oxidation processes, flocculation sedimentation and bioanalysis, first pass through Fenton oxidation and divide
Solve high concentration organic contaminant, the biodegradability of concentrated solution can be improved simultaneously, lay good basis for follow-up MBBR.MBBR work
Skill has used the ultimate principle of biomembrance process, the advantage taking full advantage of activated sludge process, overcomes again traditional activated sludge process
And the shortcoming of fixed type biological embrane method.Key problem in technology be developmental research proportion close to water, under gentle agitation easily with water freely
The biologic packing material of motion, and biologic packing material has effective surface area greatly, is suitable for the feature of microorganism adsorption growth.Make it have
The strong excess sludge of anti impulsion load is few, and sludge age is long, runs efficient stable, stirring is easy to operate with aerating system, it is simple to safeguard,
The feature such as flexible.
Summary of the invention
The invention provides the group technology that a kind of rubbish percolation liquid membrane concentrated solution processes, on solving
State problem present in method, for membrance concentration liquid height CODCr、NH4 +The features such as-N, biodegradability difference, simultaneously take account of minimizing
Secondary pollution, it is proposed that concentrated solution Fenton oxidation flocculating sedimentation anoxia/aerobic MBBR group technology.To high CODCr、
NH4 +-N and highly-saline membrance concentration liquid process and play good removal effect.
In order to achieve the above object, the concrete technical solution of the present invention is: at a kind of rubbish percolation liquid membrane concentrated solution
The group technology of reason, specifically comprises following operation: membrance concentration liquid is by Fenton oxidation, flocculating sedimentation, anoxia/aerobic MBBR life
The mode that change processes is combined processing.
Fenton oxidation step of the present invention includes:
(1) concentrated solution acid adding or alkali being adjusted pH value is 3-4；
(2) according to molar concentration [Fe2+]/[H2O2]=1/3-1/5；Mass concentration H2O2/CODCrThe ratio of=1/1-1.2/1 adds
Fenton medicament, adds H after first adding divalent iron salt2O2；
(3) under mechanical agitation, the Fenton oxidation time is 2-4h.
Flocculating sedimentation step of the present invention includes:
(1) regulating concentrated solution pH value before flocculating sedimentation is 7.5-8.5；
(2) flocculant PAM is made into the aqueous solution of 0.1%-0.5%, and concrete dosage is determined by pilot plant test, the flocculating sedimentation time
1-2h。
Anoxia of the present invention/aerobic MBBR step includes:
Anoxia/aerobic MBBR biochemical treatment, MBBR filler mostly is polyethylene, polypropylene and material modified etc. makes, and density should
For 0.95-1.02 g cm-3, hollow circular cylinder, long 5～8mm, diameter about 10mm, inside has cross supporting frame, outside to have wing
Sheet；
Media-filling rate is 40% the 60% of reactor dischargeable capacity；
Anoxia/aerobic MBBR, its concrete each stage HRT can adjust according to pollutant levels and C/N etc., inner circulating reflux ratio
Generally 100%-300%；
In anoxia MBBR, agitator uses has Banana Type stirring vane, and appearance profile lines are soft, do not damage filler.
In aerobic MBBR reactor, aerating system uses boring aeration guard system, is not easily blocked.
Present invention is characterized in that
(1) mode using advanced oxidation processes, coagulation sedimentation to organically combine with bioanalysis three, well solves single side
Method processes the deficiency that membrance concentration liquid exists.
(2) process membrance concentration liquid initially with Fenton oxidation method, remove the organic pollution of major part difficult degradation, convert
Become innoxious substance C O2And H2O, will not produce secondary pollution；And improve the biodegradability of concentrated solution, process for subsequent bio method
Lay the foundation.
(3) use coagulation sedimentation to remove produce during alkali tune cotton-shaped containing iron cement, and remove further SS,
CODCr。
(4) by Fenton oxidation+coagulant precipitation process combination, high-valence state salt and heavy metal ion is made to be solidified and lead to
Cross spoil disposal to remove.
(5) use anoxia/aerobic MBBR, have the advantages that resistance to impact is strong, stable, to NH4 +-N has good
Removal effect, and can be to concentrated solution CODCrRemove further；And it is little to have floor space, the advantages such as capital cost is low.
(6) this group technology method of operation is flexible, to Organic substance and NH4 +-N is respectively provided with good removal effect, the most right
High-valence state salt and heavy metal ion have preferable removal effect, have good economy, environmental and social benefits.
Accompanying drawing explanation
Fig. 1 is the group technology flow chart of the percolation liquid membrane concentrated solution process of the present invention.
Fig. 2 is the anoxia/aerobic MBBR technological principle schematic diagram of the present invention.
In the drawings, (a) is anoxia MBBR technological principle schematic diagram, (b) aerobic MBBR technological principle schematic diagram.
Detailed description of the invention
Below, it is more fully described the present invention by embodiment further, but the present invention is not limited to embodiment.
The purpose of the present invention can be realized by following measures:
Embodiment 1: right for studying with Shandong city life garbage landfill (landfill age be 2 years) percolate NF membrane concentrated solution
As, use the group technology of Fenton oxidation+flocculating sedimentation+anoxia/aerobic MBBR to carry out laboratory test research.Fig. 1 is for oozing
The group technology flow chart that filtrate membrance concentration liquid processes, Fig. 2 is anoxia/aerobic MBBR technological principle schematic diagram.Test is used dense
Contracting liquid CODCrFor 5561mg/L, NH4 +-N is 578mg/L, pH value 6.5.
(1) the Fenton oxidation stage, H is used2SO4Concentrated solution pH value is adjusted to 3.5, according to molar concentration [Fe2+]/[H2O2]=
1/4, mass concentration H2O2/CODCrThe ratio of=1.2/1 adds Fenton reagent in membrance concentration liquid, first adds divalent iron salt, after
Add H2O2, course of reaction is stirred continuously, Fenton oxidation time 4h.This stage concentrated solution CODCr、NH4 +-N clearance is respectively
For: 64%-68%, 9%-12%.By this stage it can be seen that Fenton oxidation is to NH4 +-N removal effect is very poor.
(2) the flocculating sedimentation stage, regulating concentrated solution pH value with NaOH before flocculating sedimentation is 8, uses the PAM of 0.1% to wad a quilt with cotton
Retrogradation is dropped, flocculating sedimentation time 1.5h.This stage concentrated solution CODCr、NH4 +-N clearance is respectively as follows: 10%-14%, 5%-7%.
(3) anoxia/aerobic MBBR stage, the mode of anoxia and the parallel connection of anaerobism two-stage MBBR is used to be designed, concrete work
Skill principle schematic is shown in that Fig. 2, MBBR filler is vinyon, and density, close to water, is 0.99 g cm-3Left and right, hollow circuit cylinder
Body, long 5mm, diameter 8mm, inside has cross supporting frame, outside to have fin；Media-filling rate is the 53% of reactor dischargeable capacity；
Anoxia MBBR uses Banana Type stirring vane to be stirred, and dissolved oxygen is 0.5mg L-1Left and right, aerobic MBBR uses boring aeration
Pipe carries out aeration, and dissolved oxygen is 2.6 mg L-1Left and right.Total HRT is 12h, and inner circulating reflux ratio is 200%.This stage concentrates
Liquid CODCr、NH4 +-N clearance is respectively as follows: 60%-71%, 86%-93%.
Through the group technology of Fenton oxidation+flocculating sedimentation+anoxia/aerobic MBBR, CODCr、NH4 +The final clearance of-N
It is respectively as follows: 87.0%-90.6%, 87.9%-94.3%.
Claims (6)
1. the group technology that rubbish percolation liquid membrane concentrated solution processes, specifically comprises following operation: membrance concentration liquid passes through
The mode of Fenton oxidation, flocculating sedimentation, anoxia/aerobic MBBR biochemical treatment is combined processing.
The group technology that a kind of rubbish percolation liquid membrane concentrated solution the most according to claim 1 processes, it is characterised in that: described
Fenton oxidation step includes:
(1) concentrated solution acid adding or alkali being adjusted pH value is 3-4；
(2) according to molar concentration [Fe2+]/[H2O2]=1/3-1/5；Mass concentration H2O2/CODCrThe ratio of=1/1-1.2/1 adds
Fenton medicament, adds H after first adding divalent iron salt2O2；
(3) under mechanical agitation, the Fenton oxidation time is 2-4h.
The group technology that a kind of rubbish percolation liquid membrane concentrated solution the most according to claim 1 processes, it is characterised in that: described
Flocculating sedimentation step includes:
(1) regulating concentrated solution pH value before flocculating sedimentation is 7.5-8.5；
(2) flocculant PAM is made into the aqueous solution of 0.1%-0.5%, and concrete dosage is determined by pilot plant test, the flocculating sedimentation time
1-2h。
The group technology that a kind of rubbish percolation liquid membrane concentrated solution the most according to claim 1 processes, it is characterised in that: described
Anoxia/aerobic MBBR step includes:
(1) anoxia/aerobic MBBR biochemical treatment, MBBR filler mostly is polyethylene, polypropylene and material modified makes, and density should
For 0.95-1.02 g cm-3, hollow circular cylinder, long 5～8mm, diameter about 10mm, inside has cross supporting frame, outside to have wing
Sheet；
Media-filling rate is 40% the 60% of reactor dischargeable capacity.
The group technology that a kind of rubbish percolation liquid membrane concentrated solution the most according to claim 1 processes, it is characterised in that: described
Anoxia/aerobic MBBR, its concrete each stage HRT can adjust according to pollutant levels and C/N, and inner circulating reflux is than generally
100%-300%。
The group technology that a kind of rubbish percolation liquid membrane concentrated solution the most according to claim 1 processes, it is characterised in that: described
In anoxia MBBR, agitator uses has Banana Type stirring vane, and appearance profile lines are soft, do not damage filler.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106890604A (en) * | 2017-03-29 | 2017-06-27 | 天津西敦津洋环保科技有限公司 | A kind of hybrid particles suspension system |
| CN108383333A (en) * | 2018-04-04 | 2018-08-10 | 蓝星安迪苏南京有限公司 | A method of for handling waste water |
| CN108409045A (en) * | 2018-04-12 | 2018-08-17 | 广东雅迪环保设备有限公司 | The garbage leachate treatment process and its processing system of efficient biochemical low amounts enrichment |
| CN110877947A (en) * | 2018-09-05 | 2020-03-13 | 深圳市中天环境有限公司 | Leachate treatment device |
| CN116986770A (en) * | 2023-09-06 | 2023-11-03 | 轩昂生态环境建设有限公司 | Method and device for treating landfill leachate concentrated solution in sanitation field |
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| CN102107997A (en) * | 2011-01-12 | 2011-06-29 | 北京林业大学 | Method for treating leachate of domestic waste incineration plants |
| CN204454778U (en) * | 2015-01-12 | 2015-07-08 | 桑德环境资源股份有限公司 | A kind of percolate concentrates the treatment unit of liquid |
| CN105254140A (en) * | 2015-11-23 | 2016-01-20 | 中冶赛迪上海工程技术有限公司 | MBBR (moving bed biofilm reactor) and activated sludge process composited two-stage A/O enhanced biological denitrification process for coking wastewater |
| CN105645637A (en) * | 2016-01-28 | 2016-06-08 | 嘉园环保有限公司 | Concentrated solution treatment method and device based on Fenton reaction |
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| KR100192144B1 (en) * | 1996-12-03 | 1999-06-15 | 장병주,이일쇄 | Solid waste made land leachate treatment process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106890604A (en) * | 2017-03-29 | 2017-06-27 | 天津西敦津洋环保科技有限公司 | A kind of hybrid particles suspension system |
| CN106890604B (en) * | 2017-03-29 | 2023-09-05 | 天津西敦津洋环保科技有限公司 | Mixed particle suspension system |
| CN108383333A (en) * | 2018-04-04 | 2018-08-10 | 蓝星安迪苏南京有限公司 | A method of for handling waste water |
| CN108383333B (en) * | 2018-04-04 | 2019-02-22 | 蓝星安迪苏南京有限公司 | A method of for handling waste water |
| CN108409045A (en) * | 2018-04-12 | 2018-08-17 | 广东雅迪环保设备有限公司 | The garbage leachate treatment process and its processing system of efficient biochemical low amounts enrichment |
| CN110877947A (en) * | 2018-09-05 | 2020-03-13 | 深圳市中天环境有限公司 | Leachate treatment device |
| CN116986770A (en) * | 2023-09-06 | 2023-11-03 | 轩昂生态环境建设有限公司 | Method and device for treating landfill leachate concentrated solution in sanitation field |
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Application publication date: 20160921 |