CN102674632B - Garbage leachate zero-emission reuse treatment method - Google Patents
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Abstract
The invention discloses a garbage leachate zero-emission reuse treatment method, which is integrated with six methods, i.e. electrostatic water treatment, electro-coagulation, a three-dimensional electrode reactor, electro-adsorption, a membrane bioreactor and activated carbon adsorption. The garbage leachate zero-emission reuse treatment method comprises the following operating steps that: 1) raw garbage leachate enters a raw water regulating tank; 2) the outlet water of the raw water regulating tank passes through an electrostatic water treatment device; 3) the outlet water of the electrostatic water treatment device passes through an electro-coagulation reactor and backwashing water flows back to the raw water regulating tank; 4) the outlet water of the electro-coagulation reactor enters the three-dimensional electrode reactor and the backwashing water flows back to the raw water regulating tank; 5) the outlet water of the three-dimensional electrode reactor enters an electro-adsorption reactor, and concentration, distillation and crystallization treatment is conducted to eluting concentrate water; and 6) the outlet water of the electro-adsorption reactor enters the membrane bioreactor, the outlet water of the membrane bioreactor enters an activated carbon adsorption tank and the outlet water of the activated carbon adsorption tank can be reused. The garbage leachate zero-emission reuse treatment method has the advantages that the garbage leachate is thoroughly treated, the treatment process does not cause secondary pollution, the efficiency is high and the cost is low.
Description
Technical field
The present invention relates to method of wastewater treatment, be specifically related to zero discharge recycle treatment method for garbage leachate.
Background technology
Percolate is a kind of unmanageable high concentrated organic wastewater, is characterized in that the water quality and quantity fluctuation is large, complicated component, and hazardous and noxious substances content is high.The improvement of percolate become China current and from now on quite over a long time key subjects controlling of environment pollution (Shen is joyous, Jin Qiting, Cui Xiqin, Deng. up-flow anaerobic sludge blanket is processed the experimental study [J] of city garbage percolate. Techniques and Equipment for Environmental Pollution Control, 2004,5 (4): 1-5).Wherein the ammonia-nitrogen content of percolate is high, more is difficult to process.At present, the research of percolate denitrogenation new technology become the popular research topic that the home and abroad environment scientific worker very is concerned about (Zhang Ping, Liu Qiang. garbage leachate in domestic garbage sanitary landfill site liquid denitrification treatment technology, 2007,15(1): 6-9).
At present, the treatment technology of percolate can be divided into two large classes: biological process and physico-chemical processes.From numerous case studies, take in and stripping-biochemical process as main technique percolate is processed more difficult to meeting relevant emission standard, microorganism is very low to the degradation capability of contained difficult degradation organic matter in percolate, and if the ammonia that stripping goes out does not reclaim, can bring secondary pollution.Physico-chemical processes mainly comprises reverse osmosis, nanofiltration, ultrafiltration, ultrasonic wave, photochemical catalysis, chemical oxidation, charcoal absorption, coagulating sedimentation etc.(Yang Feihuang, Yang Shunsheng, Cao Dongmei, etc. reverse osmosis and the application in city garbage percolate is processed thereof, 2007,33(3): 6-12).
Water Treatment Technology by Electrostatic Field is the technology that grows up in recent decades, and has shown unique performance in water treatment.
Under the effect of high tension electrostatic field, can produce a certain amount of active oxygen and ozone in water, they are all strong oxidizers, can suppress, kill bacterium, algae in water, and water is carried out disinfection.The static activated water can make microorganism wall break simultaneously, and protoplasma flows out, and reaches equally the effect of bacteria inactivation rate.In addition, this technology also has the effect that stops incrustation scale to generate, this system can be applied to the occasion that Industrial Boiler, heating boiler, industrial cycle cooling system etc. need to carry out water treatment, to bring good economic benefit and social benefit (Wang Shuohe for the user, Gao Meng, Zhang Xiaomin. domestic water Water Treatment Technology by Electrostatic Field research [J]. Railway Institutes Of Shijiazhuang's journal, 2002,15 (1): 23-30).
The existing long history of the application of electricity flocculation has a wide range of applications in source water and multiple industry wastewater treatment.(Xie Guangyan, etc. the electrochemical method progress [J] of purification of waste water. water supply and drainage, 1998,24 (1): 64-68) electrocoagulation claims again the electricity flocculation, be exactly under the external voltage effect, utilize soluble anode to produce a large amount of positively charged ions, colloid waste water is carried out coagulative precipitation.Usually select iron or aluminium as anode material.Metal electrode (as aluminium) is placed in processed water, then passes to direct current, metal anode generation this moment oxidizing reaction.The aluminum ion that produces is hydrolyzed in water, polymerization, generates a series of multinuclear hydrolysates and a cohesion, and its process and mechanism and chemical coagulation process are basic identical.Simultaneously, the hydrogen of the nascent state that produces on negative electrode in the electrocoagulation device, its reducing power is very strong, can with waste water in pollutent play reduction reaction, or generate hydrogen.Also may there be oxygen to emit on anode.Hydrogen and oxygen occur with the form of microbubble, contact with suspended particle in water treatment procedure and can obtain good adhesion property, thereby improve water treatment efficiency.In addition, under the effect of electric current, the partial organic substances in waste water may be decomposed into low molecule organic matter, also might directly be oxidized to carbonic acid gas and water and not produce mud.Partly also can not separated by the aluminium hydroxide adsorption-condensation and at hydrogen and oxygen drive float downward with suspended solids by the organism of exhaustive oxidation.In a word, electrocoagulation is processed former water and waste water is the synergy of various procedures, pollutent easily be removed under these effects (Gan Li, Gan Guangfeng. the new development of electrocoagulation water technology [J]. Treatment of Industrial Water, 2002,22 (5): 2-22).
Electro-adsorption technology (electrosorption technology), it is the phenomenon of utilizing charging electrode surface adsorption water intermediate ion and charged particle, make dissolved salts and other charge specieses in water concentrated and realize a kind of new type water treatment technology (Chen Zhaolin of water purification/desalination at the surface enrichment of electrode, Sun Xiaowei, Zhu Guangdong, Deng. the research of electro-adhesion device working process [J]. environmental engineering journal, 2009,3 (7): 11-14).
In electrochemical reactor, electropotential directly affects the oxidation-reduction characteristic of reactor, and then affect the effect of wastewater treatment, and electrode potential value is subject to the impact of structure of reactor, filler and the factors such as plate material, impressed voltage simultaneously. therefore, multiple pattern has also appearred in 3 D electrode reactor, as: granular or other fragmental working electrode material of filling between the conventional two-dimensional electrolytic tank electrode; With an electrode in the structured packing replacement conventional two-dimensional electrolytic tank electrode of certain volume; Add barrier film and the modified version reactor that derives and multiple 3 D electrode reactor etc. at the reactor specific position.(model is refined, Qu Jiuhui, and Liu Suoxiang, etc. multiple three-diemsnional electrode biofilm reactor removes the nitrate [J] in tap water. ACTA Scientiae Circumstantiae, 2001,21 (1): 39-43)
The use of plate material also occurred foaming metal (Li Baoshan, Niu Yushu, Zhai Yuchun. the Global reaction Rate of foaming metal electrode [J]. Journal of Chemical Industry and Engineering, 2001,52 (7): 593-599), micropore expanding metal and spheroidal particle fixed bed etc.the three-dimensional group of filling type electrode system takes full advantage of solution in the characteristics of electrode surface reaction, increased the contact surface of solution and electrode, its spacing of particle is little, the material mass transfer effect is greatly improved, have higher current efficiency and unit space-time yield, greatly improved the volumetric efficiency of reactor, improve wastewater treatment efficiency, its application is also increasingly extensive, removal as cupric ion in trade effluent, the processing of various waste water from dyestuff, the processing of electroplating wastewater and Nitrate In Drinking Water the (Xie Jianzhi such as remove, Zhang Shuting, Zhao Xinhua. the impact [J] of different factors on using three-dimensional electrodes system electrode points position. University Of Tianjin's journal, 2005, 38 (7): 1-7).
Compare with biochemical process, membrane separation technique is subjected to the variable effect of raw water quality little, can keep stable effluent quality, has obvious advantage in the processing of the high densitys such as percolate, used water difficult to degradate; External percolate membrane treatment process is quite ripe, and is widely used.Recent years has also been carried out the correlative study of film treating refuse percolate successively, the cities such as Beijing, Shanghai, Chongqing also are applied to membrane process the processing of percolate, and obtained treatment effect (military Jiangjin preferably, Liu Guizhong, Sun Changhong. research and the application [J] of membrane separation technique in percolate is processed, membrane science and technology, 2007,27 (6): 2-5).
Although above method respectively has its characteristics, a certain specific aim pollutent in disposing waste liquid had good result, but for process complicated component, organic content is high, the water quality and quantity fluctuation is large, the hazardous and noxious substances high percolate of ammonia-nitrogen content especially, no matter which kind of method all can not be processed thoroughly it, can't process the degree of Zero-discharge reuse.
Summary of the invention
That purpose of the present invention is intended to is high to complicated component, organic content, the water quality and quantity fluctuation is large, the hazardous and noxious substances percolate that especially ammonia-nitrogen content is high provides a kind of and processes thoroughly, treating processes non-secondary pollution, efficient is high, cost is low zero discharge recycle treatment method for garbage leachate.
For realizing above purpose, zero discharge recycle treatment method for garbage leachate of the present invention fully utilizes Static Electric Water processing, electric flocculation, 3 D electrode reactor, electro-adsorption, membrane bioreactor and six kinds of methods of charcoal absorption, and its operation steps is as follows:
(1) percolate stoste enters former water equalizing tank with stabilizing water quantity and water quality;
(2) with the water outlet of former water equalizing tank by electrostatic water treating device to decompose wherein hardly degraded organic substance;
(3) water outlet of electrostatic water treating device is passed through electric flocculation reactor to remove suspended solids and impurity, electric flocculation reactor backwashing water is back to former water equalizing tank;
(4) electric flocculation reactor water outlet enters 3 D electrode reactor and removes organism, suspended solids and ammonia nitrogen to decompose, and the 3 D electrode reactor backwashing water is back to former water equalizing tank;
(5) the 3 D electrode reactor water outlet is entered the Galvanosorptive reaction device to remove freshen, the dense water of Galvanosorptive reaction device wash-out concentrates the distillation crystallization treatment.
(6) water outlet of Galvanosorptive reaction device enters membrane bioreactor, and the membrane bioreactor water outlet enters absorbent charcoal adsorption tank; The absorbent charcoal adsorption tank water outlet can be carried out reuse.
The pond body of described former water equalizing tank is made of the PE impregnating material, establishes the pH adjusting agent throwing device at the water-in of pond body, is used for the regulating water quality water yield and pH value.
Described electrostatic water treating device high-voltage DC power supply input voltage 220V voltage of alternating current, the output voltage of high-voltage DC power supply is the 4-5kV volts DS, inner tube is polyfluortetraethylene pipe, voltage breakdown 10kV.
Described electric flocculation reactor metal electrode adopts aluminium sheet, and power supply is D.C. regulated power supply, and pulse working mode, working current voltage are 5V, and working current is 0.8A.
Described 3 D electrode reactor adopts conventional sand filter to filter the back flushing operating mode, between electrode, packing material adopts activated carbon granule, particle size range 8-12mm, and carbon-point inserts in activated carbon granule as positive and negative electrode, positive and negative electrode Jian Ju＞=100mm, the 5V DC power supply.
Described Galvanosorptive reaction device adopts Galvanosorptive reaction device suite of equipment, and positive and negative electrode is carbon electrode material, and operating voltage is 1.5V.
Described membrane bioreactor is selected curtain-type polypropylene hollow fiber membrane sheet, and membrane pore size 0.2 μ m, molecular weight cut-off are 6,000 to 50,000 dalton.
Adopt the cocoanut active charcoal particle as sorbent material in described charcoal canister.
Adopt the treatment process of materialization and biochemical processing process to compare with tradition, the present invention has following remarkable advantage and effect:
1, processing method of the present invention does not need to add chemical agent, only consumes electric energy, non-secondary pollution, its processing cost of decrease.
2, technique of the present invention need not the reverse osmosis membrane desalination, but decrease cost of investment and film replacement charge have obvious economic benefit.
3, percolate can be realized the on-the-spot reuse of production technique of waste water after the technology of the present invention is processed, and producing water ratio is high, saves a large amount of water sources.
When 4, utilizing treating refuse percolate of the present invention the treatment time short, efficient is high, treatment facility is few, take up an area little, reduced investment.
5, processing method of the present invention can realize the percolate Zero-discharge reuse, realizes not discharging toxic substance in environment, preserves the ecological environment, for landfill leachate resources has solved a guardian technique difficult problem.
Four, embodiment
Below by embodiment, zero discharge recycle treatment method for garbage leachate of the present invention is described in further detail.
Zero discharge recycle treatment method for garbage leachate comprehensive utilization Static Electric Water of the present invention processing, electric flocculation, 3 D electrode reactor, electro-adsorption, membrane bioreactor and six kinds of methods of charcoal absorption, concrete treatment step is as follows:
(1) percolate stoste enters former water equalizing tank with stabilizing water quantity and water quality;
(2) with the water outlet of former water equalizing tank by electrostatic water treating device to decompose wherein hardly degraded organic substance;
(3) water outlet of electrostatic water treating device is passed through electric flocculation reactor to remove suspended solids and impurity, electric flocculation reactor backwashing water is back to former water equalizing tank;
(4) electric flocculation reactor water outlet enters 3 D electrode reactor and removes organism, suspended solids and ammonia nitrogen to decompose, and the 3 D electrode reactor backwashing water is back to former water equalizing tank;
(5) the 3 D electrode reactor water outlet is entered the Galvanosorptive reaction device to remove freshen, the dense water of Galvanosorptive reaction device wash-out concentrates the distillation crystallization treatment.
(6) water outlet of Galvanosorptive reaction device enters membrane bioreactor, and the membrane bioreactor water outlet enters absorbent charcoal adsorption tank; The absorbent charcoal adsorption tank water outlet can be carried out reuse.
Main treatment facility involved in the present invention is: former water equalizing tank, electrostatic water treating device, electric flocculation reactor, 3 D electrode reactor, Galvanosorptive reaction device, membrane bioreactor, absorbent charcoal adsorption tank.Wherein:
The pond body of former water equalizing tank is the PE impregnating material, at the default pH adjusting agent throwing device of the water-in of pond body, is used for the regulating water quality water yield and pH value.
The electrostatic water treating device model is the ESC-100 type, manufacturer is the large Water Management Equipment Ltd. in Pukou area south, this electrostatic water treating device high-voltage DC power supply input voltage 220V voltage of alternating current, the output voltage of high-voltage DC power supply is the 4-5kV volts DS, water treating device outer tube diameter 150mm, 1.2 meters of the outer length of tube of water treating device; Inner tube is polyfluortetraethylene pipe, its external diameter 110mm, voltage breakdown 10kV, tensile strength 19.6MPa, tension set 〉=250%; Water treating device water-in diameter 76.2mm, water outlet diameter 101.6, power consumption 15W, continuously-running duty, peak flow 10t/h, physical dimension 1200 * 280 * 450.
The electricity flocculation reactor adopts aluminium sheet, and power supply is D.C. regulated power supply, and pulse working mode, working current voltage are 5V, and working current is 0.8A; This reactor is model LW3J20 type, and manufacturer is for being Shanghai power friend Electric Applicance Co., Ltd.
3 D electrode reactor adopts conventional sand filter to filter the back flushing operating mode, between electrode, packing material adopts activated carbon granule, particle size range 8-12mm, carbon-point inserts in activated carbon granule as positive and negative electrode, the positive and negative electrode spacing is not less than 100mm, 5V DC power supply, this reactor are that model is the LW6J10 type, and manufacturer is for being Shanghai power friend Electric Applicance Co., Ltd.
The Galvanosorptive reaction device adopts Galvanosorptive reaction device suite of equipment, and positive and negative electrode is carbon electrode material, and operating voltage is 1.5V, and the processing water yield is 1t/d, and this reactor is that model is DLT-DX, and manufacturer is Lishui moral power water flowing business device fabrication company limited.
Membrane bioreactor is selected curtain-type polypropylene hollow fiber membrane sheet, and membrane pore size 0.2 μ m, molecular weight cut-off are 6,000 to 50,000 dalton, aquifer yield 1t/d, and model is the special-purpose diaphragm of HQM-MBR, production firm is deep spring Genie et Environnement of Hangzhou Zhejiang University.
Adopt the cocoanut active charcoal particle as sorbent material in charcoal canister, the charcoal canister model is the KQSEI-35 type, and manufacturer is Longyan Kang Qi Environmental Protection Technology Co., Ltd.
Table 1 has reflected percolate variation of water in the invention process process, adopts as can be seen from the table the technology of the present invention treating refuse percolate to reach the purpose of wastewater zero discharge reuse.
Percolate variation of water table in table 1 embodiment of the present invention
Claims (2)
1. zero discharge recycle treatment method for garbage leachate is characterized in that: its comprehensive utilization Static Electric Water processing, electric flocculation, 3 D electrode reactor, electro-adsorption, membrane bioreactor and six kinds of methods of charcoal absorption, and its operation steps is as follows:
(1) percolate stoste enters former water equalizing tank with stabilizing water quantity and water quality;
(2) with the water outlet of former water equalizing tank by electrostatic water treating device to decompose wherein hardly degraded organic substance;
(3) water outlet of electrostatic water treating device is passed through electric flocculation reactor to remove suspended solids and impurity, electric flocculation reactor backwashing water is back to former water equalizing tank;
(4) electric flocculation reactor water outlet enters 3 D electrode reactor and removes organism, suspended solids and ammonia nitrogen to decompose, and the 3 D electrode reactor backwashing water is back to former water equalizing tank;
(5) the 3 D electrode reactor water outlet is entered the Galvanosorptive reaction device to remove freshen, the dense water of Galvanosorptive reaction device wash-out concentrates the distillation crystallization treatment;
(6) water outlet of Galvanosorptive reaction device enters membrane bioreactor, and the membrane bioreactor water outlet enters absorbent charcoal adsorption tank; The absorbent charcoal adsorption tank water outlet can be carried out reuse.
2. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: the pond body of described former water equalizing tank is made of the PE impregnating material, and pond body water-in is established the pH adjusting agent throwing device, is used for the regulating water quality water yield and pH value.
3. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: described electrostatic water treating device high-voltage DC power supply input voltage 220V voltage of alternating current, the output voltage of high-voltage DC power supply is the 4-5kV volts DS, and inner tube is polyfluortetraethylene pipe, voltage breakdown 10kV.
4. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: described electric flocculation reactor metal electrode adopts aluminium sheet, and power supply is D.C. regulated power supply, and pulse working mode, working current voltage are 5V, and working current is 0.8A.
5. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: described 3 D electrode reactor adopts conventional sand filter to filter the back flushing operating mode, between electrode, packing material adopts activated carbon granule, particle size range 8-12mm, carbon-point inserts in activated carbon granule as positive and negative electrode, positive and negative electrode Jian Ju＞=100mm, the 5V DC power supply.
6. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: described Galvanosorptive reaction device adopts Galvanosorptive reaction device suite of equipment, and positive and negative electrode is carbon electrode material, and operating voltage is 1.5V.
7. zero discharge recycle treatment method for garbage leachate according to claim 1, it is characterized in that: described membrane bioreactor is selected curtain-type polypropylene hollow fiber membrane sheet, and membrane pore size 0.2 μ m, molecular weight cut-off are 6,000 to 50,000 dalton.
8. zero discharge recycle treatment method for garbage leachate according to claim 1, is characterized in that: adopt the cocoanut active charcoal particle as sorbent material in described charcoal canister.
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| CN103754995A (en) * | 2013-12-19 | 2014-04-30 | 天津工业大学 | Three-electrode coupling treatment device for nonbiodegradable wastewater treatment |
| CN109867405A (en) * | 2017-12-04 | 2019-06-11 | 上海江柘环境工程技术有限公司 | Domestic sewage processing system |
| CN108996847A (en) * | 2018-09-05 | 2018-12-14 | 上海碧禹水务工程有限公司 | A kind of sewage water treatment method can be used for landfill leachate |
| CN109626668A (en) * | 2018-11-28 | 2019-04-16 | 烟台金正环保科技有限公司 | A kind of processing method of landfill leachate |
| CN111003894B (en) * | 2019-12-25 | 2022-05-24 | 广州市环境保护工程设计院有限公司 | Compound landfill leachate processing system |
| CN111233264A (en) * | 2020-01-21 | 2020-06-05 | 鞍钢股份有限公司 | Treatment method for recycling comprehensive wastewater in metallurgical industry |
| CN111233237A (en) * | 2020-01-21 | 2020-06-05 | 鞍钢股份有限公司 | Method for realizing zero discharge of high-concentration brine in steel production enterprise |
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| CN113200633A (en) * | 2021-05-28 | 2021-08-03 | 东方电气集团东方锅炉股份有限公司 | Method and system for producing hydrogen by using landfill leachate |
| CN114573178A (en) * | 2022-02-23 | 2022-06-03 | 贵州欧瑞欣合环保股份有限公司 | Method for full-scale treatment of landfill leachate |
| CN114853239A (en) * | 2022-02-23 | 2022-08-05 | 贵州欧瑞欣合环保股份有限公司 | Method for performing full-scale treatment on landfill leachate by utilizing electro-adsorption molecular distillation |
| CN116651164B (en) * | 2023-07-18 | 2024-02-20 | 临沂市凯特莱机械制造有限责任公司 | Recovery unit of workshop floating dust is selected in freeze-drying of fruit vegetables |
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| US20100193416A1 (en) * | 2009-01-30 | 2010-08-05 | Barbaro Ronald D | Non-biological removal and recovery of nutrients from waste |
| CN201354340Y (en) * | 2009-02-17 | 2009-12-02 | 南通京源水工自动化设备有限公司 | Municipal refuse leachate processing system |
| CN101508514B (en) * | 2009-03-20 | 2011-01-05 | 厦门凯瑞尔数字环保科技有限公司 | Zero discharge recycle treatment method for garbage leachate |
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