CN101219842A - Technique and equipment for recycling leachate of garbage - Google Patents
Technique and equipment for recycling leachate of garbage Download PDFInfo
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- CN101219842A CN101219842A CNA2008100522398A CN200810052239A CN101219842A CN 101219842 A CN101219842 A CN 101219842A CN A2008100522398 A CNA2008100522398 A CN A2008100522398A CN 200810052239 A CN200810052239 A CN 200810052239A CN 101219842 A CN101219842 A CN 101219842A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A20/131—Reverse-osmosis
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Abstract
The invention discloses a process for reusing waste leachate and a device thereof. Which comprises a homogenization process stage, an anaerobic process stage, an aerobic process stage 1, an advance oxidization stage, an aerobic process stage 2 and a reverse osmosis desalination stage.The device comprises the following equipments connected in series by pipes in turn: a water regulating tank, a collecting well, an up-flow anaerobic sludge bed reactor, a reaction tank for continuous and interval aerating, an ozonation system, a membrane biological reactor, a middle tank in which a water pump is arranged, a reverse osmosis system in which a pump, a precise filter and reverse osmosis component are arranged as well as a clean water tank.The beneficial effects of the invention lie in that: a plurality of organic matters which are difficult to degrade can be effectively resolved; a whole set of processes such as the anaerobic process, the aerobic process, the advance oxidization process and the microfiltration are used as pretreatments of the reverse osmosis(RO) system and the water quality index fully meets the water quality requirements of the reverse osmosis system. The last desalination is carried out by using reverse osmosis system to ensure the water quality index reused by the leachate.
Description
Technical field
What the present invention relates to is recycling leachate of garbage technology and equipment thereof, particularly be to adopt reverse osmosis desalination and multistage pretreated recycling leachate of garbage technology and equipment thereof.
Background technology:
At present, treating refuse technology commonly used is the garbage loading embeading technology, and the technological process of this garbage loading embeading technology is simple, cost is lower, can handle the broad variety refuse, is particularly suitable for China's national situation.But can produce percolate in garbage loading embeading technical finesse process, percolate is a kind of high-concentration waste water of complicated component, is the root that produces secondary pollution.Percolate is mainly derived from precipitation and the contained water of refuse itself, and the composition of percolate is difference with the variation of local climate, the hydrology, landfill time and technology.Not only there is the problem of the biological degradation difficulty of percolate in refuse landfill, also there is the waste water that contains high nitrogen, high organic content, highly filled, high salt amount, intractability is bigger than other percolate intractability, and the cost and the working cost of treatment facility are higher.By the end of so far, the refuse landfill that can satisfy standard-required does not also have.
Percolate is handled the normal following processing method that adopts abroad: biological treatment-coagulating sedimentation; Biological treatment-chemical oxidation-(biological aftertreatment); Biological treatment-charcoal absorption; Evaporation/the mummification of biological treatment-reverse osmosis-concentrated solution.There is following defective in above-mentioned prior art garbage leachate treatment process: percolate can not reach secondary even one-level environmental emission standard after handling.
In a word, people thirst for occurring a kind of a kind of recycling leachate of garbage technology and equipment thereof that percolate is processed into the middle water of pollution-free energy reuse especially
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of characteristics of utilizing comprehensive biotechnological, high-level oxidation technology, membrane technique are provided, the recycling leachate of garbage technology and the equipment thereof of water during percolate is treated to.
The technical scheme that solves the problems of the technologies described above is:
A kind of recycling leachate of garbage technology, described technology is by carrying out successively as the next stage:
1). the treatment stage of homogenizing: make percolate enter equalizing tank and carry out the water quality homogenizing;
2). anaerobic treatment stage: the water outlet in the equalizing tank enters through pump well carries out anaerobic biological treatment in the upflow anaerobic sludge blanket reactor, partial organic substances and suspended solid are decomposed or hold back, the sewage after the biogas of generation, mud and the purification separates by the triphase separator in the upflow anaerobic sludge blanket reactor: biogas is collected by gas skirt; Its excess sludge is discharged by the mud pipeline; Water outlet overflow after it purifies enters next unit;
3). the aerobic treatment stage 1: enter in continuous water inlet, continuous-intermittent aeration reaction tank organism and suspended solid in the percolate of further degrading by the water outlet gravity flow after the upflow anaerobic sludge blanket reactor processing;
4). the advanced oxidation stage: the water outlet after water inlet continuously, continuous-intermittent aeration reaction tank are handled is strained it into pump well by straining hydrophone, by the submersible pump in the pump well its water outlet is pumped into the ozone oxidation system again, carries out ozone Oxidation Treatment;
5). the aerobic treatment stage 2: the water outlet after the advanced oxidation stage processing enters in the membrane bioreactor, carries out aerobic treatment once more;
6). the reverse osmosis desalination stage: the water outlet of handling through aerobic stage 2 enters intermediate pool; Pump in the next stage reverse osmosis system pumps the water outlet of intermediate pool, enters accurate filter, enters reverse osmosis membrane assembly again and carries out desalting treatment, and reverse osmosis system produces water and enters clean water basin, and its water outlet is middle water.
The present invention also provides a kind of recycling leachate of garbage technology used equipment, and described equipment mainly comprises: be connected in series successively as lower device with pipeline: equalizing tank; In establish the pump well of submersible pump; Upflow anaerobic sludge blanket reactor; The continuous water inlet of connection blower fan, continuous-the intermittent aeration reaction tank; In establish the pump well of submersible pump; The ozone oxidation system; Be provided with the membrane bioreactor of microfiltration membrane in it; Intermediate pool; Be provided with the reverse osmosis system of pump, accurate filter and reverse osmosis membrane assembly in it; In set out the clean water basin of water pump.
The invention has the beneficial effects as follows:
1). with high-level oxidation technology treating refuse percolate, the organism of wherein most of difficult degradation is effectively decomposed, binding film bio-reactor, flexible configuration and effective.
2). with the pre-treatment of a complete set of technology of anaerobism, aerobic, advanced oxidation and micro-filtration as reverse osmosis (RO) system, water-quality guideline satisfies the influent quality requirement of reverse osmosis system fully.
3). owing to produce the water reuse, consider the high characteristics of percolate saltiness, utilize reverse osmosis system to carry out final desalting treatment, guaranteed the water-quality guideline of recycling leachate.
Description of drawings:
Fig. 1 is a present device syndeton synoptic diagram.
" explanation of main sequence number in the accompanying drawing "
1-1: percolate 1-2,1-3,1-4,1-5,1-6,1-7,1-8,1-9,1-10: water outlet
1-11: produce water 2: equalizing tank 3: pump well 3-1: submersible pump
4: upflow anaerobic sludge blanket reactor 4-1: triphase separator 4-2: gas skirt
4-3: sludge pipe 5: water inlet continuously, continuous-intermittent aeration reaction tank 5-1: strain hydrophone
5-2: filler 5-3: sludge pump 5-4: returned sluge pipeline 5-5: sludge pipe
6: pump well 6-1: submersible pump 7: ozone oxidation system 8: membrane bioreactor
8-1: microfiltration membrane 8-2: sludge pipe 8-3: suction pump 9: intermediate pool
10: reverse osmosis system 10-1: pump 10-2: accurate filter 10-3: reverse osmosis membrane assembly
11: clean water basin 11-1: go out water pump 12: sludge sump 13: sludge dewatering equipment
13-1: mud relief outlet 13-2: mud 14: 14-1 between blower fan: blower fan
14-2,14-3: air line
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is the present device connection diagram.
As shown in Figure 1, the invention provides a kind of recycling leachate of garbage technology, the present invention is the center with the desalting of reverse osmosis system, successively with up-flow anaerobic sludge blanket technology (UASB), continuously water inlet, continuously-intermittent aeration technology (DAT-IAT), ozone oxidation, membrane bioreactor (MBR) is as pre-treatment, guaranteed the steady running of reverse osmosis system.Described recycling leachate of garbage technology concrete steps are by carrying out successively as the next stage:
1). the treatment stage of homogenizing: make percolate 1-1 enter equalizing tank 2 and carry out the water quality homogenizing;
In the treatment stage of described homogenizing, its objective is and adjust the water yield, even water quality, and the water yield situation when taking into account height and chanting in a loud voice the phase, hydraulic detention time 10 hours be the best.
2). anaerobic treatment stage: the water outlet 1-2 in the equalizing tank 2 enters through pump well 3 and carries out anaerobic biological treatment in the upflow anaerobic sludge blanket reactor 4, partial organic substances and suspended solid are decomposed or hold back, the sewage after the biogas of generation, mud and the purification separates by the triphase separator 4-1 in the upflow anaerobic sludge blanket reactor 4; Biogas is collected by gas skirt 4-2; Its excess sludge is discharged by mud pipeline 4-3; Water outlet 1-4 overflow after it purifies enters next unit;
In described anaerobic treatment stage, enrichment is the efficient anaerobic degradation bacteria in the upflow anaerobic sludge blanket reactor 4, exists with the form of granule sludge.This stage can be removed about 60% organism, suspended solid and ammonia nitrogen, and part macrobead hard-degraded substance is broken down into the easy degradation material of small-particle.
3). the aerobic treatment stage 1: enter in continuous water inlet, continuous-intermittent aeration reaction tank 5 organism and suspended solid in the percolate of further degrading by the water outlet 1-4 gravity flow after upflow anaerobic sludge blanket reactor 4 processing;
In the described aerobic treatment stage 1, the filler 5-2 of effective enriched microorganism also is set in continuously water inlet, continuously-intermittent aeration reaction tank 5, this technology is a kind of distortion of sequencing batch active sludge, comprises into water, reaction, precipitation, water outlet and operation such as idle.Enter continuously through the water outlet 1-4 of anaerobic treatment that the active sludge hybrid junction touches reaction in continuous aeration reaction tank and the pond, enter the intermittent aeration reaction tank behind the continuous aeration again and carry out intermittent aeration and precipitation, mud is discharged through sludge pump 5-3 after the sedimentation, wherein a part of mud by returned sluge pipeline 5-4 be back to continuous water inlet, continuously-feed-water end of intermittent aeration reaction tank 5, a part drains into sludge sump 12 through sludge pipe 5-5.The effect of this technological process is: make the active sludge microorganism experience anoxic oxygen condition of becoming reconciled, circulation has certain denitrification dephosphorization function repeatedly.Continuously water inlet, continuously-intermittent aeration reaction tank 5 in this technology concrete effect and effect at patent No. ZL 97 1 16662.5, name is called in " intermittent aeration sequencing batch activated sludge sewage water treatment method continuously " detailed description, is not described in detail in this.
4). the advanced oxidation stage: the water outlet 1-5 after water inlet continuously, continuous-intermittent aeration reaction tank 5 processing strains it into pump well 6 by straining hydrophone 5-1, by the submersible pump 6-1 in the pump well 6 its water outlet 1-6 is pumped into ozone oxidation system 7 again, carry out ozone Oxidation Treatment;
In described technology 4). advanced oxidation is used ozone and water outlet 1-6 Continuous Contact in the stage, with wherein the organism and the oxidization of particulate matter of most of bio-refractory are decomposed, product is small organic molecule and inorganics, helps technology 5). the further processing of 2 pairs of percolates of aerobic stage.
At advanced oxidation in the stage, through above-mentioned technology 2). anaerobic treatment stage and technology 3). after the processing in aerobic treatment stage 1, still contain certain density hardly degraded organic substance and finely ground particle substance among the water outlet 1-6, as fulvic acid and humic acid.Utilize high-level oxidation technology,, be easy to further processing such material oxygenolysis.This stage, ozone dosage was 2～8mg/L with water outlet 1-5 and ozone Continuous Contact, and the contact reacts time is 10 minutes.
5). the aerobic treatment stage 2: the water outlet 1-7 after the advanced oxidation stage processing enters in the membrane bioreactor 8, carries out aerobic treatment once more;
In the aerobic treatment stage 2, adopt 8 couples of water outlet 1-7 of membrane bioreactor to carry out degree of depth biological treatment, with further degraded organism and finely ground particle substance wherein.Wherein, membrane module adopts curtain type film assembly, adopts the negative pressure mode water outlet.Can keep in the membrane bioreactor 8 very high biological sludge concentration (＞10g/L), and can realize separating of solid retention time and hydraulic detention time, membrane separation technique and biochemical reaction are designed to one, make technology become simply, the investment cost minimizing.The aerator blower fan 14-1 that is used for biochemical oxygen supply, but the also cleaning equipment of double as film device, gas-water ratio is about 20～30: 1.
6). the reverse osmosis desalination stage: the water outlet 1-8 that handles through aerobic stage 2 enters intermediate pool 9; Pump 10-1 in next stage reverse osmosis system 10 pumps the water outlet 1-9 of intermediate pool 9, enter accurate filter 10-2, enter reverse osmosis membrane assembly 10-3 again and carry out desalting treatment, reverse osmosis system 10 produces water 1-10 and enters clean water basin 11, and its water outlet 1-11 is middle water.
In the reverse osmosis desalination stage, utilize reverse osmosis process that the water outlet 1-8 that handles through membrane bioreactor 8 is carried out desalting treatment, make beanstalk finally reach reuse standard.This stage reverse osmosis system 10 is one of the most accurate embrane method liquid separation technologies, and it can stop all solvability salt and molecular weight greater than 100 organism, but allows water molecules to see through, and ratio of desalinization generally can be greater than 95%.
As shown in Figure 1, it is a kind of according to the used equipment of above-mentioned recycling leachate of garbage technology that the present invention also provides, and described equipment mainly comprises: be connected in series successively as lower device with pipeline: equalizing tank 2; In establish the pump well 3 of submersible pump 3-1; Upflow anaerobic sludge blanket reactor 4; The continuous water inlet of connection blower fan 14-1, continuous-intermittent aeration reaction tank 5; In establish the pump well 6 of submersible pump 6-1; Ozone oxidation system 7; Be provided with the membrane bioreactor 8 of microfiltration membrane 8-1 in it; Intermediate pool 9; Be provided with the reverse osmosis system 10 of pump 10-1, accurate filter 10-2 and reverse osmosis membrane assembly 10-3 in it; In set out 11 of water pump 11-1.
Described blower fan 14-1 is arranged between blower fan in 14; Blower fan 14-1 connects the end of air line 14-2 and air line 14-3 respectively, and the other end of air line 14-2 and air line 14-3 is connected to the bottom of continuous water inlet, continuous-intermittent aeration reaction tank 5 and membrane bioreactor 8.
Described mud discharger comprises: sludge sump 12 and sludge dewatering equipment 13; The import of described sludge sump 12 connects an end of three sludge pipes, the i.e. end of sludge pipe 4-3, sludge pipe 5-5 and sludge pipe 8-2; The other end of above-mentioned three sludge pipe 4-3, sludge pipe 5-5 and sludge pipe 8-2 is connected to the bottom of upflow anaerobic sludge blanket reactor 4, water inlet continuously, continuous-intermittent aeration reaction tank 5 and membrane bioreactor 8; The outlet of sludge sump 12 is communicated with sludge dewatering equipment 13, and sludge dewatering equipment 13 is provided with the mud relief outlet 13-1 that discharges mud 13-2.Mud 13-1 after sludge dewatering equipment 13 dehydrations directly carries out landfill in refuse landfill to be disposed.
Also be provided with returned sluge pipeline 5-4 in the present device, the end of this returned sluge pipeline 5-4 is connected on the sludge pump 5-3 of continuous water inlet, continuous-intermittent aeration reaction tank 5 bottoms, and the returned sluge pipeline 5-4 the other end is connected the feed-water end of continuous water inlet, continuous-intermittent aeration reaction tank 5.
Filler 5-2 in above-mentioned continuous water inlet, the continuous intermittent aeration reaction tank 5 are underslung plastic pellet (density is provided with wire netting less than water at the bottom of the pond, connect plastic pellet), help the apposition growth of microorganism, improve the biological concentration in the reactor.
The present invention makes full use of biology, physics and chemical action percolate is handled, and the percolate that reaches after the processing is middle water reuse.Respectively process and the result with biology, chemistry and physical action in the technology of the present invention described below:
Include with the bioprocess treatment process: 2 in the technology of the present invention). anaerobic treatment stage, 3). the aerobic treatment stage 1 and 5). the aerobic treatment stage 2.Biological treatment process is specifically: utilize each quasi-microorganism of each section biological processing unit enrichment and growth that percolate is carried out degradation treatment targetedly.Anaerobic biological process is fit to the processing of high-enriched organics, and aerobe method is fit to be organic contact scar thing processing of dissolved state and colloidal state.
Include with chemical treatment technology: in the technology of the present invention 5). advanced oxidation is used ozone Oxidation Treatment in the stage, handles the back result to be: the organism and the large particulate matter of difficult degradation in the former water of oxygenolysis.The oxidisability of ozone is extremely strong, is only second to fluorine in its redox potential of occurring in nature, is usually used in sterilization and disinfection, deodorizing and the decolouring etc. of trade effluent.In recent years, ozonize technology often is used to remove the colourity and the hardly degraded organic substance of waste water as a kind of high-level oxidation technology.Percolate 1-1 is through the aerobic oxidation of the anaerobic oxidation of upflow anaerobic sludge blanket reactor 4 with water inlet continuously, continuous-intermittent aeration reaction tank 5, still there is a certain amount of hardly degraded organic substance in water outlet, as fulvic acid and humic acid, ozone oxidation through ozone oxidation system 7, it is decomposed into the organism and the inorganics that can be degraded, improve its biodegradability, so that further handle.
Include with the physical process treatment process: 1 in the technology of the present invention). the treatment stage of homogenizing and 6) the reverse osmosis desalination stage, described physical treatment course is specifically: in technology of the present invention 1) homogenizing the treatment stage, the percolate of different time flows into equalizing tank, playing the water yield adjusts, the evenly effect of water quality is avoided because variation water quality causes bigger influence to the unitary treatment effect of subsequent disposal; In technology of the present invention 6) the reverse osmosis desalination stage, because in the technology 1) .-5). five stages can not effectively be removed mineral ion, and reverse osmosis process is one of present best desalinating process, can effectively remove the mineral ion in the processed water body, through the processing of reverse osmosis system 10, water outlet can reach the requirement of reuse standard (GB/T 18920-2002).
Claims (7)
1. a recycling leachate of garbage technology is characterized in that, described technology is by carrying out successively as the next stage:
1). the treatment stage of homogenizing: make percolate (1-1) enter equalizing tank (2) and carry out the water quality homogenizing;
2). anaerobic treatment stage: the water outlet (1-2) in the equalizing tank (2) enters in the upflow anaerobic sludge blanket reactor (4) through pump well (3) carries out anaerobic biological treatment, partial organic substances and suspended solid are decomposed or hold back, the sewage after the biogas of generation, mud and the purification separates by the triphase separator (4-1) in the upflow anaerobic sludge blanket reactor (4): biogas is by gas skirt (4-2) collection; Its excess sludge is discharged by mud pipeline (4-3); Water outlet (1-4) overflow after it purifies enters next unit;
3). the aerobic treatment stage 1: enter in continuous water inlet, continuous-intermittent aeration reaction tank (5) organism and suspended solid in the percolate of further degrading by water outlet (1-4) gravity flow after upflow anaerobic sludge blanket reactor (4) processing;
4). the advanced oxidation stage: the water outlet (1-5) after water inlet continuously, continuous-intermittent aeration reaction tank (5) are handled is strained it into pump well (6) by straining hydrophone (5-1), by the submersible pump (6-1) in the pump well (6) its water outlet (1-6) is pumped into ozone oxidation system (7) again, carry out ozone Oxidation Treatment;
5). the aerobic treatment stage 2: the water outlet after the advanced oxidation stage processing (1-7) enters in the membrane bioreactor (8), carries out aerobic treatment once more;
6). the reverse osmosis desalination stage: the water outlet of handling through aerobic stage 2 (1-8) enters intermediate pool (9); Pump (10-1) in next stage reverse osmosis system (10) pumps the water outlet (1-9) of intermediate pool (9), enter accurate filter (10-2), enter reverse osmosis membrane assembly (10-3) again and carry out desalting treatment, reverse osmosis system (10) produces water (1-10) and enters clean water basin (11), and its water outlet (1-11) is middle water.
2. according to the technology of recycling leachate of garbage described in the claim 1, it is characterized in that, the filler (5-2) of effective enriched microorganism also is set in described continuous water inlet, continuous-intermittent aeration reaction tank (5).
3. according to the technology of recycling leachate of garbage described in the claim 1, it is characterized in that, described 4). advanced oxidation is used ozone and water outlet (1-6) Continuous Contact in the stage, with wherein the organism and the oxidization of particulate matter of most of bio-refractory are decomposed, product is small organic molecule and inorganics, helps 5). the further processing of 2 pairs of percolates of aerobic stage.
4. one kind according to the used equipment of the technology of recycling leachate of garbage described in the claim 1, it is characterized in that described equipment mainly comprises: be connected in series successively as lower device with pipeline: equalizing tank (2); In establish the pump well (3) of submersible pump (3-1); Upflow anaerobic sludge blanket reactor (4); The continuous water inlet of connection blower fan (14-1), continuous-intermittent aeration reaction tank (5); In establish the pump well (6) of submersible pump (6-1); Ozone oxidation system (7); Be provided with the membrane bioreactor (8) of microfiltration membrane (8-1) in it; Intermediate pool (9); Be provided with the reverse osmosis system (10) of pump (10-1), accurate filter (10-2) and reverse osmosis membrane assembly (10-3) in it; In set out the clean water basin (11) of water pump (11-1).
5. according to equipment described in the claim 4, it is characterized in that described blower fan (14-1) is arranged between blower fan in (14); Blower fan (14-1) connects the end of two air lines (14-2,14-3) respectively, and the other end of two air lines (14-2,14-3) is connected to the bottom of continuous water inlet, continuous-intermittent aeration reaction tank (5) and membrane bioreactor (8).
6. according to equipment described in the claim 4, it is characterized in that, also include the mud discharger, this mud discharger comprises: sludge sump (12) and sludge dewatering equipment (13); The import of described sludge sump (12) connects an end of three sludge pipes (4-3,5-5,8-2), and the other end of three sludge pipes (4-3,5-5,8-2) is connected to the bottom of upflow anaerobic sludge blanket reactor (4), water inlet continuously, continuous-intermittent aeration reaction tank (5) and membrane bioreactor (8); The outlet of sludge sump (12) is communicated with sludge dewatering equipment (13), and sludge dewatering equipment (13) is provided with the mud relief outlet (13-1) of discharging mud (13-2).
7. according to equipment described in the claim 4, it is characterized in that, also be provided with returned sluge pipeline (5-4), one end of this returned sluge pipeline (5-4) is connected on the sludge pump (5-3) of continuous water inlet, continuous-intermittent aeration reaction tank (5) bottom, and returned sluge pipeline (5-4) the other end is connected the feed-water end of continuous water inlet, continuous-intermittent aeration reaction tank (5).
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