CN102503022B - Method for synthesis treatment of landfill leachate - Google Patents
Method for synthesis treatment of landfill leachate Download PDFInfo
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- CN102503022B CN102503022B CN201110336728.8A CN201110336728A CN102503022B CN 102503022 B CN102503022 B CN 102503022B CN 201110336728 A CN201110336728 A CN 201110336728A CN 102503022 B CN102503022 B CN 102503022B
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- 239000002351 wastewater Substances 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
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- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000005188 flotation Methods 0.000 abstract 2
- 230000005518 electrochemistry Effects 0.000 abstract 1
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 11
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Physical Water Treatments (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a method for synthesis treatment of landfill leachate, which adopts electrochemistry pre-oxidation treatment, biological anaerobic flotation bed treatment, photochemical catalysis decomposition treatment and biological aerobic flotation bed treatment according to water quality characteristics of the landfill leachate. The removal rate of troponin (TN) is larger than or equal to 98%, the removal rate of total protein (TP) is larger than or equal to 95%, the removal rate of chemical oxygen demand (COD) is larger than or equal to 99%, investment of waste water per ton saves by 20%, and treatment cost of the waste water per ton saves by 50%.
Description
Technical field
The present invention relates to a kind of for the synthetic Technology of processing of percolate, particularly, for the synthetic treatment process of the percolate processing of comprehensive garbage transfer, waste incineration, garbage loading embeading, use this technique effectively to remove the noxious pollutant in high density pollution water body.
Background technology
China to refuse leachate processing start late, originally mainly taking ammonia stripping+anaerobism+aerobic as main, running cost higher (15～20 yuan/ton), water outlet generally can reach percolate grade III Standard.After 2000, due to economic develop rapidly, newly-built percolate treatment plant is generally away from city, and percolate does not have condition to enter municipal sewage pipe network, and therefore also corresponding raising of processing requirements generally needs to process even first discharge standard of secondary.If percolate now only depends on biological treatment cannot reach processing requirements, generally take the method for biological treatment+advanced treatment.Representational case history has Xinfeng, Guangzhou, Chongqing Chang Shengqiao etc.What Xinfeng, Guangzhou percolate treatment plant adopted is UASB+SBR+ ro treatment technology, and treatment scale is 500m
3/ d, construction investment approximately 6,000 ten thousand (closing 120,000 yuan of ton waste water investments), approximately 25 yuan/m of processing cost
3.What Chongqing Chang Shengqiao percolate treatment plant adopted is the treatment process of reverse osmosis, treatment scale 500m
3/ d, construction investment approximately 3,700 ten thousand (closing 7.4 ten thousand yuan of ton waste water investments), approximately 10 yuan/m of processing cost
3.Because percolate and general sanitary sewage have larger difference and unstable, cause in membrane Bio-reactor Technology evolution and be faced with and hinder its difficult problem of applying.
Under the condition that film product-feed situation and Specification Design require at home at present, determine that membrane bioreactor is that a problem demanding prompt solution is for the maximum economic flow of sewage disposal: film cost is high, the life-span is short, vulnerable to pollution, is to affect the important factor that can membrane bioreactor be applied; Process not thorough, film process produce concentrated solution also need further processing.Membrane bioreactor will be according to different water quality and processing requirements, combine with different films and membrane module, and processing power and durability against pollution is restricted with various aerobic and anaerobe wastewater processing technologies.
The inventor is by utilizing the pre-oxidation treatment of electrochemical techniques as percolate, long chain molecule structural material in percolate is carried out to preoxidation open loop chain rupture, collaborative anaerobe floating bed carries out biological denitrification processing, organic pollutant is degraded, carrying out secondary oxidation decomposition with photocatalysis oxidation technique is effectively removed the TN in sewage, the oxidation biological floating movable bed that is combined carries out biological nitration processing, and TN, TP, COD in water body are effectively degraded.
Summary of the invention
The present invention is directed to that the investment existing in prior art is bigger than normal, running cost is higher and the unsettled defect of effluent quality or deficiency, for addressing the above problem, reach the object that investment is moderate, running cost is lower, the technology that the present invention adopts is: a kind of synthetic method of processing of percolate, comprises that electrochemical preoxidation decomposing system, anaerobe floating bed denitrification treatment system, photochemical catalytic oxidation decomposing system, aerobe floating bed nitration treatment system form a synthetic synthetic processing innovative technology method for percolate feature.
The synthetic method of processing of percolate, by regulating hydrolytic tank 1, electrochemical preoxidation system 2, bio anaerobic floating bed system 3, intermediate sedimentation pond 4, photocatalysis Decomposition system 5, biology aerobic floating bed system 6, terminal settling tank 7 to form a closed circuit garbage percolation liquid treating system.
Described electrochemical preoxidation system, comprises the equalizing tank that stores and have concurrently hydrolysis function mainly for the changeable and default collection of percolate water quality, and effective hydraulic detention time of equalizing tank is 12 hours; For percolate water quality characteristics, electrochemical preoxidation reactive system is set, the long-chain ring molecule in percolate is carried out to preoxidation open loop chain rupture, to improve the B/C ratio of sewage, for anaerobic biological treatment provides condition.Electrochemical preoxidation system comprises positive and negative electrode and special direct supply.
Described anaerobe floating bed nitration treatment system, comprises the rotating cage of immobilized bio-carrier bead, biological bead, transmission mechanism and power disposition, and rotating cage is submerged in water body completely.For the feature of percolate, waste water is 4 hours in the residence time of anaerobic zone, and the water body after anaerobic nitrification enters in intermediate sedimentation pond and precipitates, and the hydraulic detention time in settling tank is 40 minutes.
Described photocatalysis Decomposition system, comprises that ultraviolet source, catalytic carrier and power supply are equipped with.For the feature of percolate, ultraviolet light wavelength is 158-254nm, and water body is 5 minutes by the residence time of photocatalytic region, and the water body after photochemical catalysis enters aerobe floating bed.Water body dissolved oxygen concentration of water body after photochemical catalysis is improved, for aerobe processing provides good condition.
Described aerobe floating bed nitration treatment system, comprise the rotating cage of immobilized bio-carrier bead, biological bead, transmission mechanism and power disposition, rotating cage diameter 25% on horizontal plane, being convenient to aerobe flora inhales and takes the photograph airborne oxygen and divide, water body is 2 hours in the residence time in aerobe district, enters precipitation in terminal settling tank through aerobic denitrification water body after treatment.
Percolate is pooled to and regulates hydrolytic tank 1 interior after overregulating hydrolysis, promote and enter in electrochemical preoxidation system 2 by submersible pump, under DC Electric Field, excite, generate highly active oxygenant carries out without the oxygenolysis of selecting the organic contamination in water body taking water as medium, make the oxidized chain rupture open loop of material of the long chain molecule structure in percolate, ammonia-state nitrogen is generated nitrogen G&W by direct oxidation, and chemical oxygen demand (COD) is generated carbonic acid gas and water by direct oxidation.Water body after preoxidation, the oxidized chain rupture open loop of molecule of ring texture, enter bio anaerobic floating bed system 3 and carry out biological denitrification processing, under the effect of denitrification flora, nitric nitrogen in water body is converted, and the P in water body is deposited in the mud collection bucket that is deposited in bottom under the effect of polyP bacteria simultaneously.After bio anaerobic floating bed system 3 is processed, water body enters and in intermediate sedimentation pond 4, carries out precipitate and separate, and the water body after separation enters and in photocatalysis Decomposition system 5, carries out photocatalysis oxidation reaction.Water body enters in photocatalysis Decomposition system 5, TN, COD under the effect of decomposing in photochemical catalytic oxidation in water body are effectively decomposed, in Photocatalytic Oxidation, the dissolved oxygen in water body, carbon are improved simultaneously, for biology aerobic floating bed system 6 provides good aerobic biodegradation condition.The water body again decomposing through photochemical catalytic oxidation enters aerobe floating bed 6 and carries out biological nitration reaction, and N, P in water body, COD are decomposed by deep oxidation, carry out solid-liquid precipitate and separate in terminal settling tank 7.
Technique effect of the present invention is as follows:
The present invention compares with background technology, and the beneficial effect having is: the investment of ton waste water saves 20%; Ton wastewater treatment cost savings 50%.For percolate water quality characteristics, after adopting electrochemical preoxidation processing, the processing of bio anaerobic floating bed, photocatalysis Decomposition processing, biology aerobic floating bed to process, to clearance >=98% of TN; To clearance >=95% of TP; To clearance >=99% of COD.
Brief description of the drawings
The synthetic method of processing of a kind of percolate of accompanying drawing
Graphical indicia explanation:
1, regulate hydrolytic tank 2, electrochemical preoxidation system 3, bio anaerobic floating bed system 4, intermediate sedimentation pond 5, photocatalysis Decomposition system 6, biology aerobic floating bed system 7, terminal settling tank
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Percolate is pooled to and regulates processings that be hydrolyzed in hydrolytic tank 1 after collecting, and water body is 12 hours regulating the residence time in hydrolytic tank, the water pollutant average removal rate 15% after being hydrolyzed.
Water body after overregulating hydrolysis enters and in electrochemical preoxidation system 2, carries out strong oxidative decomposition under submersible pump effect, in water body, the molecule of organic ring texture is broken up chain rupture, fat, chemical fibre class material are decomposed by open loop, virus in water body, germ, DNA is oxidized kills, for biological Anaerobic Floating bed treatment system provides good environment.In electrochemical preoxidation system water body after treatment, COD value can obviously improve, clearance to ammonia-state nitrogen exceedes 60%, and the P surface in water body is by hydroxylation, and calcium, magnesium, iron reaction in water body generates phosphoric acid salt material and enter follow-up processing unit with water body.
After water body is processed by electrochemical preoxidation system 2, in water body, the material of polypeptide ring texture is by chain rupture open loop, affect the oxidized decomposition of organic compound of microorganism growth, water body enters bio anaerobic floating bed system 3, under the effect of denitrification flora, the oxidized reduction of most of nitric nitrogen generates nitrogen G&W, P is captured to reunite and falls to together with phosphoric acid salt material in the mud collection bucket of bottom under polyP bacteria effect, discharges system with mud.Bio anaerobic floating bed system 3 is 75% to the average removal rate of pollutent in water body.
Water body enters intermediate sedimentation pond 4 under action of gravity, and the suspended particle being free in water body obtains coagulative precipitation in intermediate sedimentation pond 4.Intermediate sedimentation pond 4 is 5% to the average removal rate of pollutent.The residence time of water body in intermediate sedimentation pond 4 is 40 minutes.
Water body overflow after precipitation enters photocatalysis Decomposition system 5, under ultraviolet catalytic, Catalytic Layer is excited and generates strong oxidizing property material the pollutent in water body is carried out without the oxidizing reaction of selecting, ammonia-state nitrogen is direct oxidation into nitrogen G&W, the oxidized nitrogen G&W that is reduced into of nitric nitrogen, oxidized carbonic acid gas and the water of resolving into of COD, phosphorus free in water body is again generated phosphoric acid salt material and is separated with water body with the metal ion reaction in water body after hydroxylation.Photocatalysis Decomposition system is 85% to the average clearance of pollutent in water body.
Water body after photocatalysis Decomposition system processing 5 enters biology aerobic floating bed system 6 and carries out biological nitration reaction under action of gravity, and water body is inspired a large amount of oxygen and carbon in photocatalysis Decomposition process, for biological aerobic treatment provides good condition.Pollutent in water body obtains oxygenolysis under nitrifier effect, and the average removal rate of pollutent is reached to 90%.Qualified discharge after aerobic floating bed system 6 water body after treatment enters terminal settling tank precipitation.
It should be pointed out that the above embodiment can make the invention of those skilled in the art's comprehend the innovation, but limit never in any form the innovation invention.Therefore, although this specification sheets is with reference to drawings and Examples, to the innovation, invention has been described in detail.But, it will be appreciated by those skilled in the art that still and can modify or be equal to replacement the present invention; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the innovation invention, it all should be encompassed in the middle of the protection domain of the innovation patent of invention.
Claims (1)
1. the synthetic method of processing of percolate, it is characterized in that: comprise and regulate hydrolytic tank (1), electrochemical preoxidation system (2), bio anaerobic floating bed system (3), intermediate sedimentation pond (4), photocatalysis Decomposition system (5), biology aerobic floating bed system (6), a closed circuit garbage percolation liquid treating system of terminal settling tank (7) composition, wherein bio anaerobic floating bed system (3) is by rotating cage, biological bead, wheelwork and power disposition system composition, photocatalysis Decomposition system (5) is by ultraviolet source, layer of carrier material, ultraviolet power source special composition, biology aerobic floating bed system (6) is by the rotating cage of immobilized bio-carrier bead, biological bead, transmission mechanism and power disposition system composition, the pre-treatment that described adjusting hydrolytic tank (1) is percolate, percolate makes pollutent obtain the removal of part by hydrolytic action, and play the effect of regulating water quality, regulating effective hydraulic detention time of hydrolytic tank (1) is 12 hours, regulating hydrolytic tank (1) that submersible pump has been installed is connected with electrochemical preoxidation system (2) by pipeline, rising of submersible pump closed fluid level controller control also and the special DC power supply of electrochemical preoxidation system (2), the chain control of ultraviolet power source special of photocatalysis Decomposition system (5), the pre-treatment that described electrochemical preoxidation system (2) is percolate, percolate is by electrochemical strong oxygenolysis, polypeptide ring texture molecule in pollutent is by chain rupture open loop, play the B/C ratio that improves water body, electrochemical preoxidation system (2) is by just, negative potential composition, just, negative potential is connected with negative pole with the positive pole of special DC power output end respectively by wire, the water outlet of electrochemical preoxidation system (2) is connected with the water-in of bio anaerobic floating bed system (3), the water outlet center absolute altitude of electrochemical preoxidation system (2) is higher than bio anaerobic floating bed system (3) water outlet center absolute altitude 10cm, water body residence time in electrochemical preoxidation system (2) is 10 minutes, the biological denitrification processing that described bio anaerobic floating bed system (3) is percolate, percolate is significantly degraded pollutent by the effect of anaerobe flora and polyP bacteria, the rotating speed of rotating cage is 1-5 rev/min, rotating cage is submerged under horizontal plane completely, the water outlet of bio anaerobic floating bed system (3) is connected with intermediate sedimentation pond 4 water-ins, the water outlet center absolute altitude of bio anaerobic floating bed system (3) is higher than intermediate sedimentation pond (4) water outlet center absolute altitude 5cm, the time that water body stops in bio anaerobic floating bed system (3) is 4 hours, the water outlet of bio anaerobic floating bed system directly enters intermediate sedimentation pond (4), and water body is 40 minutes in the residence time of intermediate sedimentation pond (4), the deep oxidation disaggregating treatment that described photocatalysis Decomposition system (5) is percolate, water body after being degraded by bio anaerobic enters in photocatalysis Decomposition system (5) and carries out Treatment by Photocatalysis Oxidation by precipitating overflow again, in percolate, the molecular chain of remaining ring texture is broken up open loop again, pollutent in water body is oxidized decomposition again, the water outlet absolute altitude of the water inlet absolute altitude of photocatalysis Decomposition system (5) and intermediate sedimentation pond (4) equates, the water outlet absolute altitude of photocatalysis Decomposition system (5) is higher than biology aerobic floating bed system (6) water outlet absolute altitude 10cm, ultraviolet light wavelength is 158-254nm, hydraulic detention time 5 minutes, the biological nitration processing that described biology aerobic floating bed system (6) is percolate, the pollutent remaining in water body obtains oxygenolysis under aerobic flora effect, rotating cage 25% is above water, 75% below horizontal plane, hydraulic detention time 2 hours, biology aerobic floating bed system (6) water outlet is connected with the water-in of terminal settling tank (7), and the residence time of water body in terminal settling tank (7) is 45 minutes.
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| CN201110336728.8A CN102503022B (en) | 2011-10-19 | 2011-10-19 | Method for synthesis treatment of landfill leachate |
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| CN201110336728.8A CN102503022B (en) | 2011-10-19 | 2011-10-19 | Method for synthesis treatment of landfill leachate |
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| CN106186513A (en) * | 2016-07-12 | 2016-12-07 | 佛山杰致信息科技有限公司 | A kind of wastewater efficient processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418832A (en) * | 2002-12-16 | 2003-05-21 | 华中科技大学 | Technology for treating and controlling waterlogging in refuse bury field |
| CN200971333Y (en) * | 2006-08-16 | 2007-11-07 | 贵州绿色环保设备工程有限责任公司 | Organic waste water regeneration water purification groove |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1418832A (en) * | 2002-12-16 | 2003-05-21 | 华中科技大学 | Technology for treating and controlling waterlogging in refuse bury field |
| CN200971333Y (en) * | 2006-08-16 | 2007-11-07 | 贵州绿色环保设备工程有限责任公司 | Organic waste water regeneration water purification groove |
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