CN107032503A - A kind of biological respinse wall for handling percolate and its application - Google Patents
A kind of biological respinse wall for handling percolate and its application Download PDFInfo
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- CN107032503A CN107032503A CN201611018567.7A CN201611018567A CN107032503A CN 107032503 A CN107032503 A CN 107032503A CN 201611018567 A CN201611018567 A CN 201611018567A CN 107032503 A CN107032503 A CN 107032503A
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- percolate
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract
The invention discloses a kind of biological respinse wall for handling percolate, direction is flowed through along percolate being sequentially provided with into water and dredge area, buffering transition region, bio-reaction zone, exhalant region, activated carbon and zeolite, the particle diameter that mixing is filled with that particle diameter is 1 2mm in bio-reaction zone are 2 3mm manganese sand, the haydite that particle diameter is 4 5mm.The biological respinse wall of present invention processing percolate, has the characteristics that：(1) packing material used in reaction wall is pollution-free, be easy to get, wide material sources, and construction method is simple and easy to do and service life is long；(2) treatment effect is excellent：COD clearances are all more than 92%, and water outlet photobacteria inhibiting rate is substantially all below 30%, and TAC is overall gradually to be increased as the reaction time elapses, and is realized the weak of high toxicity percolate and is poisoned；(3) higher biocoene metabolic activity can be kept to be that contaminant degradation ability is strong everywhere in bio-reaction zone.
Description
Technical field
The invention belongs to technical field of landfill leachate treatment, and in particular to a kind of biological respinse of processing percolate
Wall, the invention further relates to the method for percolate is handled with the biological respinse wall.
Background technology
Percolate, as " byproduct " during garbage loading embeading, is a kind of higher organic wastewater of concentration, wherein
Not only contain carcinogenic substance, also more than 20 kinds of hazardous contaminant is put into " blacklist " of priority pollutant,
Complicated component, including Some Organic Pollutants, heavy metal, high ammonia nitrogen etc., water quality and quantity fluctuation is big；If dealt with improperly, it will
Severe contamination air, surface water and groundwater, cause secondary pollution, have a strong impact on environment and human health.
The characteristics of underground water pollution has complexity, disguise and is difficult to recover, once water-bearing layer is subject to pollution, recovers
Process with purification is quite very long；Current more typical groundwater remediation technology there are about kind more than ten, and according to recovery technique
Principle, four major classes, i.e. Physical, chemical method, bioanalysis and comprehensive repair technology can be divided into.It can be divided into again by repair mode different
Position recovery technique (Ex-Situ) and based technique for in-situ remediation (In-Situ).
Permeable coefficient tensor is a kind of underground water based technique for in-situ remediation for being built in underground, abbreviation PRB technologies (Permeable
Reactive Barrier).20 end of the centurys occurred, and were the focuses in current groundwater remediation research field, with application
Extensively, the advantages of high treating effect, slow reaction medium consumption, low expense, energy-conserving and environment-protective.Biological respinse wall is given birth to as PRB with reinforcing
The combination technology of thing restorative procedure, with its repair process green, it is economical, the exposure of pollutant can be reduced and Land Environment is disturbed
Dynamic small the advantages of, it has been widely used in the laboratory of foreign countries and site remediation research, it is considered to be most development potentiality
Emerging recovery technique.
Because of the toxicity and complexity of the low temperature (12~14 DEG C), oligotrophic and pollutant of groundwater environment, actually repairing
Generally require to import the microorganism with special metabolic capabilities within the walls to biological respinse in multiple, pass through microbe
Degraded and metabolism reach the purpose of purifying aqueous layer.
The content of the invention
It is an object of the invention to provide it is a kind of handle percolate biological respinse wall, the biological respinse wall it is anti-oxidant
Ability is strong and contaminant degradation ability is strong.
It is a further object to provide a kind of method that percolate is handled using above-mentioned biological respinse wall.
The technical solution adopted in the present invention is, a kind of biological respinse wall for handling percolate, along garbage filter
Liquid flow through direction be sequentially provided with into water dredge area, buffering transition region, bio-reaction zone, exhalant region.
The features of the present invention is also resided in,
The material of the biological respinse wall wall is polyethylene.
Water inlet is dredged and multiple baffle plates is provided with area, multiple baffle plate formation Z-shapeds.
Water inlet is dredged in area filled with the rubble sand that particle diameter is 2-4mm.
Buffer in transition region and exhalant region filled with the quartz sand that particle diameter is 1-2mm.
The activated carbon and zeolite, particle diameter that mixing is 1-2mm filled with particle diameter in bio-reaction zone are 2-3mm manganese sand, particle diameter
For 4-5mm haydite.
Activated carbon, zeolite, the volume ratio of manganese sand and haydite are 1~2：1~2：1~2：1.
Another technical scheme of the present invention is, a kind of to handle percolate using above-mentioned biological respinse wall
Method, specifically includes following steps：
Step 1, biological respinse wall is vertically installed in the direction of percolate diffusion, biological respinse wall width is more than rubbish
The range of scatter of rubbish percolate plume；
Step 2, hydraulic detention time is determined；
Step 3, carry out adding biological respinse after the completion of batch strain domestication outside wall, strain domestication using percolate
Area, carries out the processing of percolate.
The beneficial effects of the invention are as follows the biological respinse wall of present invention processing percolate has the characteristics that：(1)
Packing material used in reaction wall is pollution-free, be easy to get, wide material sources, and construction method is simple and easy to do and service life is long；(2) processing effect
It is really excellent：COD clearances are all more than 92%, and water outlet photobacteria inhibiting rate is substantially all below 30%, TAC
It is overall gradually to increase as the reaction time elapses, realize the weak of high toxicity percolate and poison；(3) in bio-reaction zone
Higher biocoene metabolic activity can be kept to be that contaminant degradation ability is strong everywhere.
Brief description of the drawings
Fig. 1 is the structural representation of the biological respinse wall of present invention processing percolate；
Fig. 2 is the suppression tendency chart that preliminary experiment various concentrations percolate grows to functional microorganism；
Fig. 3 is water sample photobacteria inhibiting rate；
Fig. 4 changes over time the curve map changed to go out water sample TAC；
Fig. 5 is variation diagram of the microbiologic population's metabolic activity in bio-reaction zone with flat board incubation time.
In figure, area, 2. buffering transition regions, 3. bio-reaction zones, 4. exhalant regions are dredged in 1. water inlets.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
The biological respinse wall of present invention processing percolate, structure along percolate as shown in figure 1, flow through direction
It is sequentially provided with into water and dredges area 1, buffering transition region 2, bio-reaction zone 3, exhalant region 4.
The material of the biological respinse wall wall is polyethylene.
Water inlet is dredged and multiple baffle plates is provided with area 1, and multiple baffle plates form Z-shapeds to extend percolate in wall
Residence time.
Water inlet is dredged filled with the rubble sand that particle diameter is 2-4mm in area 1, and its high mechanical strength, usage cycles are long.
Buffer in transition region 2 and exhalant region 4 filled with the quartz sand that particle diameter is 1-2mm.
The activated carbon and zeolite, particle diameter that mixing is 1-2mm filled with particle diameter in bio-reaction zone 3 are 2-3mm manganese sand, particle diameter
For 4-5mm haydite, the wherein volume ratio of activated carbon, zeolite, manganese sand and haydite is 1~2：1~2：1~2：1.Because haydite is raw
The ideal carrier of thing film, manganese sand is unique to removal effects such as arsenic, and zeolite has excellent adsorptivity, ion exchangeable, activated carbon
Colourity, stink can be effectively removed, a small amount of polyurethane foam (internal diameter about 10mm porous cube) is added if necessary to promote
Biomembrane is quickly generated.
The treatment effect of biological respinse wall of the present invention is described in detail below according to specific embodiment.
1. biological respinse wall model：It is respectively according to the total length and width of structure design, the height of biological respinse wall of the present invention first
700mm, 50mm, 60mm biological respinse wall model；Wall fixes material selection polyethylene；
2. the determination of bio-reaction zone proportion of filler：It is according to volume ratio by activated carbon, zeolite, manganese sand, haydite：①1/1/
1/1；②1/1/1/2；③1/1/2/1；④1/2/1/1；5. 2/1/1/1 mixing；5 pure water empty bottles are taken, bottom of bottle, bottle cap is pruned
Drill in (3 holes)；Eluriate the filler of 5 kinds of ratios respectively (activated carbon is individually washed, because its light weight is bubbled through the water column)；Fill in proportion successively
Enter corresponding empty bottle, be inverted (every bottle of total measurement (volume) 200mL)；The percolate of 10 times of dilution (is derived from river village ditch percolate
Treatment plant, COD about 10000mg/L) 5 bottles are poured into respectively and collect filtrate；Stoste and 5 groups of liquor C OD are determined, calculates and removes
Rate is followed successively by 64.7%, 57.6%, 67%, 83.5%, 69.4%, and selection soprano is final filling mixture ratio, therefore is defined as 4.
That is activated carbon:Zeolite:Manganese sand:Haydite=1：2：1：1.
3. reaction wall biological toxicology tolerance range is demarcated and influent concentration is determined：Take 5mL soil extractions are standby (to be intended to add
10uL)；Prepare 20mL LB culture mediums standby (160uL to be added)；Set 1.~10. 10 group dilution gradient (volume ratio is respectively rubbish
Rubbish percolate/water=1/1,1/2,1/3,1/4,1/5,1/6,1/7,1/8,1/9,1/10), 1 group of stoste compare (be intended to plus
20uL), 1 tissue culture nutrient solution+soil extraction makees reference；The 96 orifice plate positions according to arranging are loaded (all with liquid-transfering gun successively
Apparatus sterilizes and stood in advance is allowed to natural cooling)；It is loaded completion and reads 0h data with ELIASA (Multiskan FC types), it
After be placed on shaking table incubated with 70r/min, 27 DEG C of conditions, a data are read per 24h, until (i.e. 32 more than 1/3
Hole) the stopping readings of absorbance ＞ 2；This experiment passes through functional bacteria under the different percolate concentration of BIOLOG microplates technical research
The growth inhibition situation planted, determines biological respinse wall tolerance range, and comprehensive choose grows, suppresses small percolate concentration；Fig. 2
For data processed result, the percolate original absorbance of each diluted concentration is close as seen from Figure 2, but during with culture
Between passage gradually break up；Cultivate the stoste absorbance after 48h and be higher than nutrient solution+leaching liquor, illustrate that stoste promotes soil leaching
Microorganism also shows in the growth of functional microorganism in extract, the percolate of one times of dilution (percolate/water is 1/1)
Go out similar growth trend, and absorbance is overall with percolate in addition to ten times of dilutions (percolate/water is 1/10)
The reduction of concentration and successively decrease, i.e. the suppressed degree of growth of functional microorganism is incremented by, and illustrate biological toxicology tolerance in reaction wall
Scope is full concentration range, and the higher functional microorganism metabolic activity of concentration is higher, and (percolate/water is for six times of dilutions
1/6) experimental group after differs greatly with other groups；Therefore this experiment influent concentration be set to functional microorganism growth it is relatively worst
5 times of dilutions.
4. flow is determined：With peristaltic pump with the water flowing into biological respinse wall of 1r/min rotating speed, dripped out from flowing into first
Beginning timing is dripped ends to outflow first, and the time is hydraulic detention time, about 1.8h (water capacity about 300mL in wall).
In a dynamic condition, COD clearances increase, HRT extension with the extension of hydraulic detention time (HRT) in PRB pilot test systems
The organic matter of difficult for biological degradation is set also to obtain Partial digestion；Consulting literatures know most case history HRT=6h, therefore change peristaltic pump
Rotating speed is 0.1r/min, now, water outlet 100mL used times about 6h, is drafted as the flow velocity, follow-up work inspection treatment effect.
5. strain domestication and fixing means：The percolate 200mL of 5 times and 10 times dilutions is taken to be added to 250mL respectively
Each to add 10g enhanced biologicals microbial inoculum (commercially available) in triangular flask (sterilizing), cotton sealing is placed on shaking table with 70r/min, 27
DEG C incubated liquid color into bottle of condition is yellow (about 2-3 days) by blacking.Further expand numerous：Draw 100mL domestications situation good
Bacterium solution (5 times dilution) add the percolates of quantitative 5 times of dilutions to cumulative volume 500mL, ibid CMC model 2-3 days.Will
Above-mentioned completion expands numerous 500mL bacterium solutions and is poured slowly into bio-reaction zone, stands 1 day, and 10mL 5 times of dilution rubbish are during which supplemented per 6h
Rubbish percolate, takes out the flow-stopping plate at bio-reaction zone two ends afterwards.
6. reaction wall recruitment evaluation：It is raw out of water outlet COD removal effects, Ecotoxicology, inoxidizability and wall below
Thing metabolic activity is estimated to the biological respinse wall treatment effect.
1) COD removal effects.Wriggling pump operation is connected, regulation rotating speed is 0.1r/min；It is daily 9 to determine sample time：00,
15：00,21：00, and by sampling order number consecutively 1,2,3 ...；Potassium dichromate method determination sample COD is used daily and is recorded,
If fluctuation is larger, a small amount of domesticated strain is added to bio-reaction zone.As shown in appendix 1：COD clearances are stable and are both greater than
92%, principal reaction wall (5 days) COD removal effects in process phase are excellent.
Table 1 goes out water sample COD clearance situations of change
2) toxic level is tested.Photobacteria can send the light of certain wavelength under normal operation, and many noxious materials can
Suppress its luminous intensity, can realize that the acute toxicity of water quality is detected by determining luminous intensity variations；This experiment uses the party
Method detects aquatic toxicity：Prepare luminous bacterium solution (Vibrio luminous)；The water sample that goes out being collected into is numbered in chronological order,
Each sample takes 7mL (regulation sample pH value is between 7.5-8.5) and adds a spoon (special) NaCl and mixes, and 0.5mL is pipetted respectively
Sample enters to determine pipe, and blank is done with equivalent 2%NaCl liquid；Each sample adds the luminous bacterium solutions of 0.5mL to mix, and stands 15min, reading note
Record, calculates luminous inhibiting rate and compares.Such as accompanying drawing 3：Photobacteria inhibiting rate is except the inhibiting rate of No. 12 samples 32.3% is all 30%
Below.
3) inoxidizability.Inoxidizability is exactly that can effectively suppress the ability of free-radical oxidation reaction, and its mechanism of action is anti-
Oxidation material acts directly on free radical or consumes the material of easily generation free radical indirectly, prevents further anti-
Should.This experiment assesses water outlet inoxidizability using soluble transferring receptor determination method：Choose 9 and go out water sample, prepare 300mL
LB culture mediums are standby (each sample 18mL to be added)；Prepare sterilizing：Culture medium, pipette tips (1000uL, 200uL) are some, 15mL plastics
Centrifuge tube (30), 50mL triangular flasks (10)；Expand numerous strain：From culture medium with oese (alcolhol burner sterilizing) picking it is a small amount of certain
Specific bacterium colony, is inoculated with into sterilized 50mL culture mediums, is placed on shaking table with 70r/min, the incubated about 36h of 27 DEG C of conditions
(observation culture medium is muddy)；The cultured bacterium solution 1mL of Shui Yang ﹑ are added into triangular flask successively, culture medium 18mL is simultaneously numbered,
It is placed on shaking table with 70r/min, the incubated about 16h of 27 DEG C of conditions；3mL is drawn from aforesaid liquid and adds to centrifuge tube, whirlpool
Whirlpool blender concussion 3min, (notes temperature change and adjusts) at any time with 37 DEG C of water bath with thermostatic control 20min afterwards；Strictly press kit
Dosing and specification operation；The 96 orifice plate positions according to arranging are loaded that (all apparatus sterilize and quiet in advance with liquid-transfering gun successively
Put and be allowed to natural cooling), each hole is loaded 150uL, after the completion of read absorbance (ultraviolet spectrometry, wavelength 520nm), substitute into formula
Calculate oxidation resistance.As shown in Figure 4：Over time, TAC is totally in rising trend, with regard to water outlet
Speech has been phenomenon, reflects the water quality toxicity reduction through processing, and the antioxidation activity influence on microorganism is small.For the total anti-of 6h
The abnormal conditions that oxidability significantly increases suddenly, analyze and change answering for generation for external environment mainly due to microorganism
Swash reaction, filler at initial stage of intaking in addition is all novel substance, strain then adsorbs all in starvation, absorbs dirty to greatest extent
Thing is contaminated, therefore water outlet antioxidative activities are far above other；Microorganism gradually adapts to the environment afterwards, and antioxidative activities are down to normal water
Flat, then passage gradually rises again over time.
4) microbial metabolic activity.Microorganism using 31 kinds of carbon sources of Biolog ecological boards single hole color AWCD and its with
The change of time can be used for the average activity for characterizing microbiologic population's metabolism.It is raw in distance respectively when water outlet COD is basicly stable
Upper strata, middle level, lower floor at 100mm at thing reaction zone water inlet, 240mm, 470mm draw 1ml liquid standing 24h and take supernatant, 9 groups
Sample with 10 times of 0.9% normal saline dilution, is sequentially added near alcolhol burner to Biolog ecological boards according to typesetting respectively
150ul, blank adds the physiological saline of equivalent 0.9%；After the completion of with ELIASA read 0h data, be placed in afterwards on shaking table with 70r/
Min, 27 DEG C of conditions are incubated, and data and observed and recorded color change hole count are read per 24h, until more than 1/3 (i.e. 32
Hole) absorbance ＞ 2 stops.Accompanying drawing 5 is that (nine groups of data are tired and upper, middle and lower layer is finally integrated into three groups of numbers for data processed result figure
Before, during and after i.e.), the slope difference very little of bio-reaction zone Nei Ge positions AWCD change curves, illustrates difference as shown in Figure 5
Wall position microorganism is more similar to the whole utilization ability and metabolic activity of carbon source；Biological metabolism activity in bio-reaction zone
Gradually reduced with water (flow) direction, i.e. front end ＞ middle-ends ＞ rear ends, show biological respinse wall wall with the change of lateral displacement
Change, microbial degradation pollutant ability is gradually reduced.
Claims (8)
1. a kind of biological respinse wall for handling percolate, it is characterised in that flow through direction along percolate and set successively
Have into water and dredge area (1), buffering transition region (2), bio-reaction zone (3), exhalant region (4).
2. the biological respinse wall of processing percolate according to claim 1, it is characterised in that the biological respinse wall wall
The material of body is polyethylene.
3. the biological respinse wall of processing percolate according to claim 1, it is characterised in that area (1) is dredged in water inlet
It is interior to be provided with multiple baffle plates, multiple baffle plate formation Z-shapeds.
4. according to the biological respinse wall of any described processing percolate of claims 1 to 3, it is characterised in that it is described enter
Water is dredged in area (1) filled with the rubble sand that particle diameter is 2-4mm.
5. according to the biological respinse wall of any described processing percolate of claims 1 to 3, it is characterised in that described slow
Rush in transition region (2) and exhalant region (4) filled with the quartz sand that particle diameter is 1-2mm.
6. according to the biological respinse wall of any described processing percolate of claims 1 to 3, it is characterised in that the life
The activated carbon and zeolite, particle diameter that mixing is 1-2mm filled with particle diameter in thing reaction zone (3) are that 2-3mm manganese sand, particle diameter are 4-5mm
Haydite.
7. the biological respinse wall of processing percolate according to claim 6, it is characterised in that the activated carbon, boiling
The volume ratio of stone, manganese sand and haydite is 1~2：1~2：1~2：1.
8. the method that a kind of any described biological respinse wall of use claim 1~7 handles percolate, its feature exists
In specifically including following steps：
Step 1, biological respinse wall is vertically installed in the direction of percolate diffusion, biological respinse wall width oozes more than rubbish
The range of scatter of filtrate plume；
Step 2, hydraulic detention time is determined；
Step 3, carry out adding bio-reaction zone after the completion of batch strain domestication outside wall, strain domestication using percolate, enter
The processing of row percolate.
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