CN1440941A - Anaerobic moleculer decomposing method of refuse percolate - Google Patents

Anaerobic moleculer decomposing method of refuse percolate Download PDF

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CN1440941A
CN1440941A CN 03109754 CN03109754A CN1440941A CN 1440941 A CN1440941 A CN 1440941A CN 03109754 CN03109754 CN 03109754 CN 03109754 A CN03109754 A CN 03109754A CN 1440941 A CN1440941 A CN 1440941A
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decomposing
water
anaerobic
producer
percolate
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CN1179896C (en
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梁瑞年
赵素平
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Shi Fushu
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Shi Fushu
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Abstract

The present invention relates to the treating method of refuse percolate. The treating process includes the steps of predecomposition, anaerobic treatment, decomposing oxidation, adsorption, flocculating precipitation and filtering. The present invention has the advantages of both physical-chemical process and biological process and has low investment, low running cost and easy management.

Description

The anaerobism molecular breakdown method of percolate
[technical field]
The present invention relates to a kind of technical field of waste water processing, more specifically, the present invention relates to a kind of rubbish leachate treatment method.
[background technology]
Municipal wastes is the solid waste that produces in processes such as resident living, activity in production.According to up-to-date " research of Chinese city domestic refuse output, composition and treatment situation " report, domestic waste output can reach 8,982 ten thousand tons in 2000, per capita rubbish day output 1.15-1.20kg.The traditional rubbish of China is dissolved and toppled over mode and have many major defects: (1) occupies a large amount of soils, and serious farmland is destroyed; (2) severe contamination air.In the place of a large amount of rubbish air storages, stinking smell assaulting one's nostrils, and mouse causes disaster, and mosquitos and flies grows, and has pollutents such as a large amount of ammonia, sulfide to discharge to atmosphere, and only volatile organic compounds just reaches kind more than 100, wherein contains many carcinogenic, teratogens.(3) severe contamination water body.The rubbish of Chu Liing not only contains pathogenic micro-organism like this, also can produce a large amount of acidity and alkaline organic pollutant, and the heavy metal in the rubbish can be dissolved out, become the Trinitarian source of pollution of organism, heavy metal and pathogenic micro-organism, its percolate flows into the peripheral ground water body and infiltrates soil, can cause surface water or phreatic severe contamination.(4) the simple covering of rubbish easily causes the anaerobic environment that produces methane gas, and the biogas of its generation can cause the place where the garage is piled up explosion hazard.(5) a large amount of municipal wastess directly are stacked in the rural area, suburb, and not only serious environment pollution causes the masses' strong dissatisfaction on every side, but also have restricted the development in city.
According to up-to-date " research of Chinese city domestic refuse output, composition and treatment situation " report, the rubbish of whole nation actual treatment is about 44-48%, wherein adopt compost and burning disposal seldom, and be difficult to reach the requirement of existing standard, in the total amount of garbage treatment, landfill disposal is about 95%, and wherein only 20% amount of landfill can reach existing specified standards.
With regard to trash processing way, landfill is the ultimate disposal means of rubbish, also is the main processing mode of present most countries.The garbage loading embeading processing is simple to operate, adaptability is strong, compares with other method, has characteristics such as construction investment is few, working cost is low, technical requirements is not high.Incineration treatment of garbage and compost treatment are subjected to all multifactor impacts, also are difficult to extensive employing at present.Therefore, present most urban construction garbage sanitary filling fields solve earlier that rubbish is dissolved and the problem of harmless treatment, consider to improve then under competent condition to handle and utilize level again.
Landfill yard is divided into mountain valley-type, pool ditch type and ground mo(u)ld top half landfill yard by the present position.Whether by taking the antiseepage processing can be divided into attenuation type and dead front type landfill yard, in China, the national standard of garbage loading embeading has clearly stipulated to be provided with impervious barrier and leachate collection treatment facility.Therefore, strict restriction percolate infiltrates in the aqueous stratum, and refuse landfill is minimized phreatic pollution.Press the landfill yard structure and divide, the dead front type landfill is divided into aerobic landfill, accurate aerobic landfill and anaerobism landfill again.The aerobic landfill is with directly air blast in landfill yard of gas blower, and accurate aerobic landfill is to utilize natural ventilation to reach a layer inner air flow at the header end.It and the difference of anaerobism landfill difference in leachate collection discharge system, the former can not seal by percolate collection water exhaust system water outlet, guarantee air admission, and conduit upper will guarantee air flow spaces; The latter antithesis, water outlet has water seal, does not consider to collect the air flow spaces of drainage pipeline.
Percolate is the product of liquid in the landfill yard gravity flowage, is mainly derived from the interior moisture of precipitation and rubbish itself.Liquid is in flow process, and many factors may influence the character of percolate, comprises physical factor, chemical factor and biotic factor etc., so the change of properties of percolate is quite big.In general, its pH value is 4~9, and COD is 2000~62000mg/L, BOD 5Be 60~45000mg/L, heavy metal concentration basically identical in heavy metal concentration and the municipal wastewater.Percolated liquid in city refuse landfill is a kind of high concentrated organic wastewater of complicated component, does not directly enter environment if do not add processing, can cause serious environmental to pollute.Different with general municipal effluent, the BOD of percolate 5Change greatly with COD concentration height, metal content height, water quality and quantity, ammonia nitrogen content is high, microbial nutrition element ratio imbalance etc.
The treatment process commonly used of percolate is as follows:
Traditional activated sludge process: traditional activated sludge process treating refuse percolate is big because of investing, and treatment effect is bad, and especially denitrification effect is bad, is substituted by other technology substantially now.
Hypoxemia, aerobic activated sludge process and SBR method: these method improvements the active sludge flow process, because of it can keep higher operating load, so weak point consuming time is than conventional activated sludge method treating refuse percolate more effectively.But be difficult to the macromolecular compound content height of degrading in the water from diffusion, inhibition of heavy metals, and the low excessively activity that has had a strong impact on biological bacteria of water temperature in winter.Therefore annually keep for a long time that water outlet is up to standard to be still a very big problem.
The aeration stabilization pond: compare with activated sludge process, aeration stabilization pond volume is big, and organic loading is low, and the degraded progress is slower, and engineering is simple, and the inexpensive area in the soil is the most economical percolate aerobic biological process for treating.The U.S., Canada, Britain, Australia and German studies show that adopt the aeration stabilization pond can obtain percolate treatment effect preferably.For example Britain sets up a 1000m for 60000 pounds in Bryn Posteg Landfill investment 3Aeration oxidation pond, establish 2 surface aeration equipments, minimum hydraulic detention time is 10 days, the oxidation pond water outlet is gone into municipal sewage system through the post precipitation long pipeline of 3 kms of flowing through.This system brings into operation nineteen eighty-three, the maximum COD of percolate CrBe 24000mg/L, maximum BOD 5Be 10000mg/L, F/M=0.05~0.3kg COD/ (kg MLSS d), 0~150 meter of water yield variation range 3/ day, water outlet BOD 5Average out to 24mg/L, but accidental when having above 50mg/L, the COD clearance reaches 97%, but need add P in operational process, consider the day-to-day operation expense, investment is repaid and interest, directly drain into city planting ductwork with percolate and compare, can save 750 pounds every year.But in conjunction with the national conditions of China, the garbage sanitary filling field of planning to build now He built mostly concentrates on large-scale, megapolis.The land use problem is very outstanding, can not provide a large amount of soils to make stabilization pond and use.Therefore this kind method is not suitable for the national conditions of China.Can not be as first process as consideration.
Anaerobic biological treatment: up to over nearly 20 years, accumulation along with discipline developments such as microbiology, biological chemistry and engineering practice, continually develop the anaerobic treatment process that makes new advances, the hydraulic detention time that has overcome traditional technology is long, characteristics such as organic loading is low, make it that very much progress arranged in theory and practice, handling high density (BOD 5〉=2000mg/L) the organic waste water aspect has obtained good result.The main advantage of anaerobic biological treatment is a less energy consumption, and is simple to operate, and therefore investment and working cost are cheap, and because the surplus sludge volume that produces is few, required nutritive substance is also few, as its BOD 5/ P only is required to be 40001, though the content of P is less than 1mg/L usually in the percolate, but still can satisfy the requirement of microorganism to P.Nitrated with common anaerobism, 35 ℃, load are for 1kgCOD/ (m .3D), 10 days residence time, the COD clearance can reach 90% in the percolate.
In recent years, the anaerobic biological treatment method of exploitation has: anaerobic biofilter, anaerobism contact tank, upflow anaerobic sludge blanket reactor and segmentation anaerobism are nitrated etc.
Adopt anaerobic technique still can not make water outlet reach the standard of emission request separately, generally adopt anaerobism+aerobic method to handle.Its method has:
Anaerobism+oxidation ditch+facultative lagoon technology: Guangzhou Lee cheats refuse landfill sewage work by flow 300m 3/ d design, water inlet BOD 5Be about 2500mg/L, COD CrBe 4000mg/L, NH 3-N is that 600mg/L, colourity are about 1000 times for about 1000mg/L, SS; Water outlet BOD 5Be 30mg/L, COD CrBe 80mg/L, NH 3-N is that 10mg/L, SS are that 70mg/L, colourity are 40 times.Select for use technical process to be: anaerobism+oxidation ditch+facultative lagoon+flocculation sediment.Better when influent quality, when the facultative lagoon water outlet is up to standard, can directly facultative lagoon water outwards be discharged; And relatively poor when influent quality, when the facultative lagoon water outlet does not reach emission standard, then enable the coagulating sedimentation system, discharge the settling tank supernatant liquor again.From overlapping the running condition of technology at present, when the COD of water inlet was higher, effluent quality was good; In case COD reduces, particularly winter low temperature is short of rain, and COD is reduced to when being unfavorable for biochemical treatment, and each water-quality constituents of water outlet is all higher to be difficult to up to standardly, and water outlet is brown, although enable flocculation sedimentation system, effect is still undesirable.This shows percolate colourity and NH 3Effective removal of-N will produce favourable influence to biochemical treatment.
Soil facture that is soil irrigation method be the human sewage treatment that adopts the earliest, but municipal sewage treatment are more common in the application of land treatment system.For the treatment process of percolate, leachate collection is got up, make it to be back to landfill yard by sprinkling irrigation.The percolate of circulation landfill yard is owing to increase rubbish humidity, thereby improved biological activity, quickens methane production and refuse and decomposes.Secondly because the Evaporation in the sprinkling irrigation reduces the percolate volume, help the running of Waste Water Treatment, but and save energy expense.North English Seamer Carr refuse landfill, some adopts percolate recirculation, and the COD value of recirculation zone percolate reduces morely after 20 months, and metal concentration has decline by a relatively large margin, and NH 3-N, Cl -Change in concentration is less.Decline that metal concentration is described is not only because diluting effect causes, also may be that inorganic components causes its absorption in the rubbish.Because China's southern area annual precipitation is bigger,, adopt the poor effect of recirculation percolate when running into rainwater season.Therefore this processing method is only applicable to quantity of precipitation in those years area seldom.
Reverse-osmosis treated method: use Rochem ' s patent disk pipe reverse osmosis system that elementary percolate is handled in Britain percolate treatment plant.This treatment technology is a segregation film system designed by southern Humberside Wen Tedun landfill yard and that produce.The key of this system is the disk pipe.This cylindrical composition comprises plate, octagons and the wear-resistant membrane bed course that pipe is interior, and it can handle those percolates that stops up common reverse osmosis membrane system fast.Percolate enters Rochem ' s treatment system and carries out aeration and pH and proofread and correct under the pressure of film.When the percolate that contains pollutent was flowed through the right cylinder intimal surface, the pollution substance in the percolate was separated owing to counter osmosis and is discharged through film.The operation of total system cleaning is automatization, when needs carry out matting to this system, the control telltale will demonstrate information, and the while automatic cleaning system is just used the chemicals that has stylized this system is carried out the inside cleaning, makes it return to initial function.Because percolate is under encapsulation situations, surface at film forms turbulent flow, reduce oxidation, produce stench, so will carry out inside to certain hour cleans, but the pitch time of this cleaning is longer, and the organism of heavy metal, suspended solid, ammonia nitrogen and deleterious difficult degradation can be removed by segregation film system, and the water after the processing satisfies strict emission control standards.
The Ihlenbery landfill yard of Germany is installed the Rochem ' s treatment system that comes into operation now, and the sewage quantity of its processing power is 50m 3/ h, the rate of recovery of water is 90%.
Embrane method is handled and is had many good qualities, but the investment of its ton water is too high, and working cost is also very high.
China really can satisfy the landfill yard of sanitary landfill standard and few at present, and many landfill yards are because the leachate collection system that can't can reach environmental protection requirement by the design requirements construction is limit in investment.Therefore, development investment is economized, and effective percolate art breading technology has been an instant thing.Domestic also do not having efficient ways on (for example percolate) treatment technology aspect the difficult biochemical waste water at present, and simple often biological treatment or physical chemistry are handled.Anaerobism molecular breakdown technology (UP ANAEROBIC MOLECULE DECOMPOSE writes a Chinese character in simplified form the UAMD technology) has been started the uncharted field of sewage disposal technology, and physical chemistry technology and biologic treating technique are organically combined cleverly.Bring into play the advantage of physico-chemical processes and biological treatment to greatest extent, low investment, low working cost is convenient to plurality of advantages such as management.Will bring once new revolution for the water technology of China.
[summary of the invention]
[technical problem that will solve]
The treatment process that the purpose of this invention is to provide a kind of percolate of refuse landfill, this method organically combines physical chemistry technology and biologic treating technique cleverly, bring into play the advantage of physico-chemical processes and biological treatment to greatest extent, thereby reach low investment, low working cost is convenient to plurality of advantages such as management.
[technical scheme]
Garbage filter liquid processing method of the present invention is made up of predecomposition unit, anaerobic unit, decomposing oxidation unit, absorbing unit, flocculation sediment unit and filtering unit.
Because a large amount of organic polymers is contained in high-concentration hardly-degradable sewage the inside,,, bring very big burden will for the processing of back if these difficult COD that decompose do not handle in advance comprising long-chain, ring-type, heterocyclic molecule.Therefore, at first use high frequency waves producer, electromagnetic field generator, electronic generator, stationary magnetic field producer to unite handles percolate in the predecomposition unit, utilize the energy of destroyed macromolecular chain that these equipment provide, ring-type, heterocycle molecule, make them be degraded to low molecule, thereby make these materials become the good material of biochemical property.
The high frequency waves producer produces the wave of oscillation that its frequency is 20-25KHz, and the little gas nuclear under this high frequency waves effect in the liquid can produce vibration, growth, the closed dynamic process of collapse, and this process is the adiabatic process of concentrating the sound field energy and discharging rapidly; Above process just is called the ultrasonic cavitation effect.During aqueous solution generation ultrasonic cavitation, system can be divided into cavitation bubble, cavitation bubble upper layer and liquid phase body region.Because have the high temperature of about 1900 ∽ 572K in the cavitation bubble and surpass the high pressure of 500atm, so, for as nonpolar easy volatile materials such as halo fat, short-chain fat hydrocarbon, will in cavitation bubble, directly burn or thermolysis.And at the cavitation bubble upper layer, this layer is the superthermal liquid phase layer of one deck around gas phase, because water is supercritical state, make many organism, can dissolve each other fully with empty G﹠W as benzene, oil of mirbane, phenols etc., the oxidizing reaction homogeneous phase is carried out, improve reaction efficiency.Because cavitation effect, but the water vapor pyrolysis produces a large amount of OH, and OH has high redox potential, and its value is 3.08V, and OH can oxidation comprises and is difficult to biodegradable various organism and makes it mineralising.In addition, ultrasonic wave can make inside ELECTRON OF MOTION be quickened under the synergy of electromagnetic field, and when the energy of electronics during greater than intermolecular bonding force, the chemical bond of molecule will rupture, and generates active free radical.
The synergy of stationary magnetic field and electromagnetic field.Magnetic is a kind of attribute of material; Because the atom of component, molecule or functional group have magnetic moment, so all materials all have paramagnetism, diamagnetism or ferromegnetism.When having external magnetic field, magnetic moment changes, and the bond angle of constitute framework, bond distance are affected, and can change thereby make in the material.So just changed the microcosmic condition of chemical reaction.Under stationary magnetic field and electromagnetic intensity combined action, not only make some compound molecule, particularly the COD macromole of indissoluble produces polarization or strengthens its polarization, and the unbound electron direction of motion in magnetic field constantly changes, and under action of ultrasonic waves, can also improve the kinetic energy of ELECTRON OF MOTION in magnetic field; Those skilled in the art know, and stationary magnetic field or electromagnetic field also help to improve reaction conditions, fast reaction speed.
Be subjected to the high-energy electron bombardment of high-speed motion when contaminant molecule after, maybe when the pollution molecule is subjected to the particular light ray irradiation, after these contaminant molecules absorb high-energy electron or photon, after molecule is stimulated, molecule is in high level, chemical bond rupture can take place in the stable molecule that at this moment is situated between, and forms corresponding free radical, these free radicals very easily with dissolved oxygen or other oxidant reaction.Perhaps after N-type semiconductor has absorbed the photon of energy more than or equal to band gap width, enter excited state, the excited electron on the valence band is crossed the forbidden band at this moment, enters conduction band, forms photo-induced hole simultaneously on valence band.Photo-induced hole has very strong trapped electron ability, and the photic electronics on the conduction band has and has very high activity, forms redox system at semiconductor surface; Redox reaction produces a large amount of OH with high activity organism is carried out decomposing oxidation.
In a word, under above-mentioned various physical actions, macromole that exists in the garbage loading embeading effusion or polymer substance can be decomposed into low molecular material, thereby obtain to contain the waste liquid of the good material of biochemical property.
Anaerobic unit: this unitary anaerobic treatment is effectively to remove organic pollutant and make its mineralising by the anaerobism effect, changes organic compound into methane and carbonic acid gas.In this process, need multiple different microorganisms population to participate in.This microorganism participates in the anaerobic treatment process and can reach:
A. the hydrolysis of biological polymer;
B. ferment amino acid and sugar is converted into hydrogen, acetate, voltaile fatty acid and ethanol;
C. anaerobic oxidation longer chain fatty acid and ethanol;
D. anaerobic oxidation intermediate product volatile acid;
E. by the acetic acid type methanogen acetate is converted into methane;
F. by producing the hydrogen methanobacteria hydrogen is converted into methane (carbon dioxide reduction).
The decomposing oxidation unit: this unit is from material microcosmic molecular structure, by the series of physical chemical action, promptly pass through the effect of high frequency waves, electromagnetic field, electronics, stationary magnetic field, hydroxyl ion, ozone, destroy the chemical bond between contaminant molecule, generate the free radical have the height reactive behavior in a large number, and the extremely strong hydroxyl oxidize of oxidized property is for becoming CO 2, H 2O, N 2Deng inorganics, thus the physico-chemical process of thorough degradation of contaminant.
Absorbing unit: through the sewage after predecomposition unit, anaerobism effect, the decomposing oxidation cell processing, although removed many organism, but wherein also contain the lower pollutent of a large amount of molecular weight, these pollutents or be ionic species perhaps are the polar molecule form.Therefore, in light of this situation, the present invention has set a kind of absorbing unit, promptly adds at the sewage handled to have the very sorbent material of ferromagnetism and absorption property, and through test, these sorbent materials are very effective to removing COD, colourity, stink, ammonia-state nitrogen.Described sorbent material can be organic or inorganic sorbent material, for example various ion exchange absorbents of organic adsorbent, and as the anionresin sorbent material, cation-exchange adsorbing substance, inorganic adsorbent is zeolite for example, various molecular sieves etc.
Flocculation unit:, should add flocculation agent and form big alumen ustum in order fully to remove sorbent material and to be ionic species or to be the formed precipitation of pollutent of polar molecule form.Described flocculation agent can be organic or inorganic flocculation agent, and organic floculant for example is a polyacrylamide, and inorganic flocculating agent for example is an iron cpd, aluminum compound etc.
Precipitation unit: will precipitate with supernatant liquor by settling tank and to separate, and thoroughly make water outlet reach emission standard.
Filtering unit: this element is to guarantee thoroughly means up to standard of final outflow water, and under the situation that COD of sewage is not very high or the water outlet emission standard is not high, the previous section processing unit can guarantee that fully water outlet reaches the emission request standard.Can not offer this element.
Can realize purpose of the present invention by following technical proposals.As indicated in accompanying drawing 1, a kind of percolate anaerobism molecular breakdown method is characterized in that this method comprises the steps:
(1) predecomposition step: percolate is united through high frequency waves, electromagnetic field, electronics and stationary magnetic field and is carried out predecomposition;
(2) anaerobism step: the predecomposition liquid that obtains is previously effectively removed organic pollutant and is made its mineralising through the anaerobic treatment of the entrained different microorganisms population of active sludge;
(3) decomposing oxidation step: the percolate after the anaerobic treatment passes through the combined action of high frequency waves, electromagnetic field, electronics, stationary magnetic field, hydroxyl ion and/or ozone again, thus thorough degradation of contaminant;
(4) adsorption step: the percolate behind the decomposing oxidation is the low molecule organic pollutant of ionic species or polar form again with adsorbents adsorb;
(5) step of flocculation precipitation: the percolate after the absorption adds flocculation agent and precipitates;
(6) filtration step: the percolate that has flocculated filters, and obtains desired waste liquid.
Described predecomposition step is carried out in the predecomposition unit, this unit by two independently decomposing pool 27 compose in parallel, pass through pipe connection between the decomposing pool 27, these decomposing pool 27 bottoms are provided with water circulating pump 23, water circulating pump 23 is extracted the circulating sewage of decomposing pool out by pipeline 20, wherein a part of sewage turns back in the decomposing pool 27 through pipeline 29 circulations, pipeline 29 is laid along decomposing pool 27 outer walls, and link to each other with the water sprayer 24 that is provided with on decomposing pool 27 outer walls, sewage is injected in the water by water sprayer 24, another part sewage enters tank 28 through threeway again, this tank 28 is installed in the decomposing pool pond along last, tank inside is equipped with the high frequency waves producer 26 and the electronic generator 25 of stack or parallel placement, in decomposing pool 27 bottoms stationary magnetic field producer 21 and electromagnetic field generator 22 are set, electromagnetic field generator 22 places in the middle of decomposing pool 27 bottoms, and stationary magnetic field producer 21 places electromagnetic field generator 22 both sides.
Described anaerobism step is carried out in anaerobic unit, this anaerobic unit structure is as follows: sewage pump 510, by pipeline 56, linking to each other with the low density water-distributing device 52 that is installed in anaerobic pond 58 bottoms, is anaerobic pond 58 bodies on this device 52, on these anaerobic pond 58 tops high-effect triphase separator 51 has been installed, its anaerobic unit top is equipped with water-sealed tank 53, biogas effuser 55, anaerobic unit are divided into two groups of ponds, between two groups of ponds shelter bridge 59 are arranged.In order to overhaul facility, hand-hole 54 is set respectively at anaerobic pond top and bottom.
Described decomposing oxidation step is carried out in the decomposing oxidation unit, its decomposing oxidation unit is divided into 4 placed in-line decomposing oxidation ponds 69, be communicated with by pipeline between each decomposing pool 69, tank 60 is installed on decomposing oxidation Chi Chi edge, tank inside is equipped with high frequency waves producer 66 and electronic generator 65, at decomposing oxidation Chi Lingyicechi along ozonizer 62 is installed, hydroxyl ion producer 61, oxygenate apparatus is installed in the air blast machine room, between each decomposing pool unit gallery is set, the ozone pipeline is laid along the decomposing pool exterior wall, and the self-priming water sprayer 611 that is provided with on exterior wall links to each other, simultaneously the waste pipe of recycle pump is also laid along exterior wall, also links to each other with the another one interface of the self-priming water sprayer 611 that is provided with on the exterior wall; Hydroxyl ion producer 61 pipelines are laid along decomposing pool intermediary gallery, and electromagnetic field generator 64, stationary magnetic field producer 63 are arranged on the bottom in pond.
Described stationary magnetic field producer by sewage import 31, air or ozone gas import 32, water sprayer 33, horizontal mixing tube 34, diffusion of moisture pipe 35 and permanent magnet 36 according to shown in Figure 3 rearranging, air or ozone gas import 32 become 165 jiaos with stationary magnetic field producer axle, water sprayer 33 is the hydraucone shape, inlet diameter is 1: 2 with the ratio of exit diameter, each permanent magnet 36 is made of eight alnico magnets, the magnetic field of magnets direction is identical, magneticstrength 4000-6000Gs.
Described electromagnetic field generator is made up of A/C alternation magnet and coil 41, stainless steel shake plate 42, magnet 43, joint pin 44 and supply lead, and its magneticstrength is more than the 4000Gs.
Described hydroxyl ion producer is made up of with power interface 76 inlet mouth 71, shell 72, high-tension circuit plate 73, discharge prong 74, hydroxyl ion air outlet 75.
Stone flour, zeolite or molecular sieve that described sorbent material was made up of according to weight ratio graphite and convex-concave rod stone in 1: 0.1 to 0.2: 1.
Preferably, the stone flour formed in 1: 0.1 to 0.2: 1 according to weight ratio by graphite and convex-concave rod stone of described sorbent material.
[beneficial effect]
Anaerobism molecular breakdown technology has been started the uncharted field of sewage disposal technology, and physical chemistry technology and biologic treating technique are organically combined cleverly.Bring into play the advantage of physico-chemical processes and biological treatment to greatest extent, low investment, low working cost is convenient to management.Reach same wastewater treatment level, for example reach the COD=80 mg/litre, BOD 5=20 mg/litre, NH 3-N=19 mg/litre, compared with prior art, gross investment can reduce by 10~30%, and working cost reduces by 20~40%, and can realize automatization control fully.
[description of drawings]
Following brief description accompanying drawing.
The brief description accompanying drawing:
Fig. 1 represents percolate processing flow chart of the present invention;
Fig. 2 represents predecomposition unit equipment diagrammatic cross-section;
Fig. 3 represents stationary magnetic field producer diagrammatic cross-section;
Fig. 4-1 expression electromagnetic field generator diagrammatic cross-section;
Fig. 4-2 expression electromagnetic field generator schematic top plan view;
Fig. 5-1 expression anaerobic unit equipment schematic top plan view;
Fig. 5-2 expression anaerobic unit device A-A diagrammatic cross-section;
Fig. 6-1 expression decomposing oxidation unit equipment schematic top plan view;
Fig. 6-2 expression decomposing oxidation unit equipment I-I diagrammatic cross-section;
Fig. 7-1 expression hydroxyl ion producer longitudinal profile synoptic diagram;
Fig. 7-2 expression hydroxyl ion producer horizontal section synoptic diagram;
[embodiment]
The specific embodiment of the present invention is described now.
From the percolate of refuse landfill (COD=45000 mg/litre wherein, BOD 5=13500 mg/litre, NH 3-N=2500 mg/litre) at first enters the predecomposition unit and implement described predecomposition step, under the comprehensive action of high frequency waves that the unitary high frequency waves producer of predecomposition, electromagnetic field generator, electronic generating, stationary magnetic field producer are produced respectively, electromagnetic field, high-velocity electrons, stationary magnetic field, after this percolate carries out decomposing in 24 hours, water outlet can reach COD=32000 mg/litre, BOD 5=12150 mg/litre, NH 3-N=1000 mg/litre.
Described predecomposition modular construction as shown in Figure 2.It by two independently decomposing pool 27 compose in parallel (2 in accompanying drawing is drawn single decomposing pool 27), pass through pipe connection between the decomposing pool 27.Between two decomposing pools 27 gallery is set and is convenient to operations such as maintenance, waste water enters decomposing pool 27 and flows out from decomposing pool 27 through position shown in Figure 2.These decomposing pool 27 bottoms are provided with water circulating pump 23, water circulating pump 23 is extracted the circulating sewage of decomposing pool out by pipeline 20, wherein a part of sewage turns back in the decomposing pool 27 through pipeline 29 circulations, pipeline 29 is laid along decomposing pool 27 outer walls, and link to each other with the water sprayer (shower nozzle) 24 that is provided with on decomposing pool 27 outer walls, sewage is injected in the water by water sprayer 24, produces negative pressure, like this air is sucked in the water, improve the purpose that oxygen is dissolved in the water thereby reach.Simultaneously, another part sewage enters tank 28 through threeway (not drawing) again, this tank 28 is installed in the decomposing pool pond along last, and tank inside is equipped with the high frequency waves producer 26 (by the product of general Jet, Inc production) and the electronic generator 25 (accompanying drawing 4) of stack or parallel placement.The high frequency waves producer is launched the 20-25KHz ultrasonic wave, the ultrasonic energy of this frequency produces the excusing from death cavitation effect in the extremely short time, the local physical energy that produces High Temperature High Pressure, a large amount of high-velocity electrons one same-action that this energy and electronic generator 25 produce, can destroy the long-chain of polymer hard-degraded substance, reach the purpose of predecomposition.
Stationary magnetic field producer 21 (accompanying drawing 3) and electromagnetic field generator 22 (product that Guangzhou China starlight electricity Industrial Co., Ltd. produces) are set in decomposing pool 27 bottoms simultaneously, electromagnetic field generator 22 places in the middle of decomposing pool 27 bottoms, stationary magnetic field producer 21 places electromagnetic field generator 22 both sides, as shown in Figure 2.This paper below will describe the structure of stationary magnetic field producer 21 in detail.This stationary magnetic field producer 21 produces the stationary magnetic field, electromagnetic field generator 22 produces the alternating magnetic field of 50Hz, the magnetic action in these magnetic fields can change the bond angle between water molecules, pollution substance between the water molecules is come off, a large amount of these pollution substances of high-octane electron-bombardment quicken the decomposition of pollution substance simultaneously.By the comprehensive action of above-mentioned physical energy, sewage has obtained sufficient predecomposition, and biodegradability is improved.For follow-up anaerobic unit processing is laid a good foundation.
Can see by Fig. 2, from described predecomposition unit effusive sewage (COD=32000 mg/litre, BOD 5=12150 mg/litre, NH 3-N=1000 mg/litre) enters described anaerobic unit through sewage pump, implement described anaerobism step.Can see by Fig. 5-1 and 5-2, sewage promotes through sewage pump 510, by pipeline 56, by bottom low density water-distributing device 52 (product that sky, Yangzhou, Jiangsu rain plumbing equipment Group Co.,Ltd produces), with the uniform water yield, suitable upflow velocity enters anaerobic pond 58 inside, and this water-distributing device can reach the effect of the anaerobic sludge that fully is stirred in anaerobic pond 58 bottoms.Anaerobic bacterium in the anaerobic pond 58 (on anaerobic sludge) under the condition of pH value and pollutant load, is resolved into methane with pollution substance at suitable water temperature (about 30 degrees centigrade), carbonic acid gas, and base substances such as water reach the purpose that purifies water.Methane, carbonic acid gas, aqueous vapor can move upward from anaerobic pond 58 bottoms with the form of gaseous state (small bubbles), always carry some mud (anerobe) in the uphill process, if these anaerobism mud are by a large amount of the taking away of bubble, whole anaerobic system is destroyed, sewage, mud (anerobe), bubble are effectively separated fully, be the key of whole anaerobic system control.For this reason, high-effect triphase separator 51 (product that sky, Yangzhou, Jiangsu rain plumbing equipment Group Co.,Ltd produces) has been installed on this anaerobic pond top, gas in the anaerobic pond, solid, liquid mixture can reach high efficiency separation after by this separator 51, isolating sewage enters the decomposing pool unit through pipeline 57 gravity flows, the biogas that produces is sent by biogas effuser 55 through water-sealed tank 53, can carry out second stage employ.Mud is after triphase separator separates through gas mud, and because of no bubble buoyancy, and slowly down sedimentation, these mud repeat foregoing process again, have reached the purpose that purifies water like this.Can reach COD=8000 mg/litre, BOD through the waste water of handling like this 5=2430 mg/litre, NH 3-N=1000 mg/litre.59 is two groups of shelter bridges between the pond among Fig. 5-1 and the 5-2.
Described decomposing oxidation step is implemented in described decomposing oxidation unit, described decomposing oxidation unit (accompanying drawing 6-1 and 6-2) is divided into 4 independent decomposing pools 69 in parallel, be communicated with by pipeline between each decomposing pool 69, waste water enters decomposing pool 69 and flows out decomposing pool 69 along direction indicated among the figure.Enter tank 60 from the effusive supernatant liquor of front anaerobic unit through pipeline 67.This tank 60 is installed in decomposing oxidation Chi Chi along last, and tank inside is equipped with high frequency waves producer 66 (by the product of general Jet, Inc production) and electronic generator 65 (product that Guangzhou China starlight electricity Industrial Co., Ltd. produces).High frequency waves producer 66 is launched the 20-25KHz ultrasonic wave, the ultrasonic energy of this frequency produces the excusing from death cavitation effect in the extremely short time, the local physical energy that produces High Temperature High Pressure, a large amount of electronics synergies that this energy and electronic generator 65 produce, can destroy the long-chain of polymer hard-degraded substance, reach the purpose of decomposition.The unitary ozonizer 62 of decomposing oxidation (the Shandong dimension is spun east environmental unit factory), hydroxyl ion producer 61 (Fig. 7) are installed in decomposing oxidation Chi Chi along last.Oxygenate apparatus (Root's blower, voltage: 220V, lift: 6 meters; Power: 6Kw, aeration quantity: 120 meters 3/ hour be installed in the air blast machine room and figure here).Between each decomposing pool unit gallery is set, the ozone pipeline is laid along the decomposing pool exterior wall, and the self-priming water sprayer 613 that is provided with on exterior wall links to each other, the waste pipe of recycle pump is also laid along exterior wall simultaneously, also link to each other with the another one interface of the self-priming water sprayer 613 that is provided with on the exterior wall, sewage is injected in the water by water sprayer 613, and produces negative pressure, and ozone is sucked in the water.Similar principle, hydroxyl ion producer 61 pipelines are laid along decomposing pool intermediary gallery, spray in the water by water sprayer 613 with circulating sewage.Oxygenate apparatus feeds oxygen in the water by traditional aeration mode.Ozone, hydroxyl ion, oxygen and water molecule reaction produce a large amount of hydroxyls.Hydroxyl has the intensive oxidisability, its energy oxidation overwhelming majority pollution substance, thus reach the purpose that purifies water.A part of in addition ozone molecule can remove colourity, the stink in anhydrating.Play the purpose of improving Working environment.Electromagnetic field generator 64 (Fig. 4), stationary magnetic field producer 63 (product that Guangzhou China starlight electricity Industrial Co., Ltd. produces), the position of electronic generator 65 (product that Guangzhou China starlight electricity Industrial Co., Ltd. produces) as shown in Fig. 6-1 are arranged on the bottom in pond, alternating magnetic field and high-energy electron combined action that they produce, directly remove pollutants in sewage matter on the one hand, also play catalytic effect on the other hand for the hydroxyl oxidize pollution substance.Can reach COD=800 mg/litre, BOD through the sewage that decomposes 5=220 mg/litre, NH 3-N=200 mg/litre, this waste water enters displacement pool again.
Sewage enters the unitary displacement pool of absorption replacement(metathesis)reaction from the gravity flow of described decomposing oxidation pond, the an adsorption device that this unit uses is the equipment that the technician of sewage treatment area knows, for example groove, pond, adsorption tower or post etc., preferably, absorption replacement(metathesis)reaction of the present invention unit uses adsorption tank, and configuration one adds the device of sorbent material on this pond.Through the sewage after decomposing, water molecules has a large amount of polarity, can influence next step precipitation and mud-water separation.In this pond, drop into sorbent material, the stone flour that for example inorganic adsorbent or organic adsorbent, inorganic adsorbent for example were made up of according to weight ratio graphite and convex-concave rod stone in 1: 0.1 to 0.2: 1, various zeolites, various molecular sieves etc., preferably stone flour.
This stone flour has very strong magnetic and absorption property, and it can be eliminated the polarity of water molecules and remove COD, colourity, stink and ammonia nitrogen simultaneously.Sewage enters the flocculation unit through gravity flow behind the absorbing unit, gives full play to the effect of precipitation agent for stone flour, also forms a large amount of alumen ustum by adding flocculation agent.Therefore be provided with the flocculation unit behind the absorbing unit.What the flocculation unit used is the equipment that those skilled in the art know, and for example settling bath or pond etc. enter settling tank after the flocculation of sewage process and carry out mud-water separation.The mud that produces is sent into refuse landfill after dewatering.Supernatant liquor can reach COD=120 mg/litre, BOD 5=40 mg/litre, NH 3-N=25 mg/litre, treated sewage has reached emission standard.
In order to satisfy the strict more standard of sewage discharge in the future, the sand filter and the activated carbon filtration that use in the conventional sewage treatment process can also be set in the settling tank back.Strict emission control standards more can be satisfied through filtering sewage, the COD=80 mg/litre can be reached, BOD 5=20 mg/litre, NH 3-N=19 mg/litre.
Below with several equipment that use in the embodiment of detailed front.
Stationary magnetic field producer (accompanying drawing 3), it by sewage import 31, air or ozone gas import 32, water sprayer 33, horizontal mixing tube 34, diffusion of moisture pipe 35 and permanent magnet 36 according to shown in Figure 3 rearranging.Air or ozone gas import 32 become 165 jiaos with stationary magnetic field producer axle, water sprayer 33 is the hydraucone shape, inlet diameter is 1: 2 with the ratio of exit diameter, the negative pressure that the sewage that flows into from sewage import 34 produces sucks air or ozone gas, jet action through water sprayer 33 arrives horizontal mixing tube 34, magnetize by permanent magnet 36 through diffusion of moisture pipe 35 again, each permanent magnet 36 is made of eight alnico magnets, the magnetic field of magnets direction is identical, magneticstrength 4000-6000Gs, when current passed through from the pipeline of water sprayer formula stationary magnetic field producer, molecule was subjected to the cutting of magnetic line of force, internal energy of molecular is changed, the promote the oxidation reaction.
Electromagnetic field generator (Fig. 4-1, be to produce the pole change of per second 50 times and the equipment of vibrational energy 4-2) by the AC single phase poaer supply, it is made up of alternation magnet and coil 41, stainless steel shake plate 42, magnet 43, joint pin 44 and supply lead, this equipment is A/C alternating electromagnetism iron, and the magneticstrength of design is more than the 4000Gs.Waste water changes the waste water with magnetic into after being shone by high-intensity magnetic field.The structure of pollutent and water molecules can be upset and destroy when in having the waste water of magnetic, the N utmost point and S utmost point change frequency being increased to 50Hz, change the molecular structure water of waste water.The magnetic wave energy of the oscillating plate that has connected electro-magnet by alternating magnetic field vibrated in waste water and produced ripple.This vibrational energy is separated from each other pollutant component and comes off, and promotes to decompose.
The hydroxyl ion producer is the ionic air generating unit that the organism of decomposing pool is carried out oxygenolysis, decolouring, deodorizing processing, and this apparatus structure as shown in Figure 7.It is made up of with power interface 76 inlet mouth 71, shell 72, high-tension circuit plate 73, discharge prong 74, hydroxyl ion air outlet 75.It produces negative ion by the cathodic electricity corona, and as connecting negative voltage at prong electrode 74, by the electronic energy generation ionization of high voltage electric on the prong pin end of electronegative pressure, thereby snap-out release goes out electronics, and combines with airborne molecule, produces negative ion.Ionised air is to utilize high-voltage electric energy and photochemical reaction, generates a large amount of free radicals, and can very easily react with water oxygen, generates hydroxyl radical free radical (OH-).Ionised air can resolve into small-molecule substance with organism in the waste water and aromatics matter, and divalent, the organic combination of 3 valencys as dirt settling in the waste water resolved into small molecules particles such as acetaldehyde and organic oxygen acid, by decolouring bleaching actions such as hydrogen peroxide, produce decolorizing effect, with the RNA and the DNA that destroy microorganism in the water, promote dirt oxidation, decomposition, decolouring, deodorizing and sterilization in the decomposing pool.
Embodiment: Hangzhou refuse landfill percolate Processing Test purpose: checking UAMD water treatment technology and running cost
Date of test: test major equipment and medicine totally on September 2,7 days to 2002 July in 2002 (57 days): experimental scale such as high-effect triphase separator, low density water-distributing device, water-sealed tank, ozonizer, oxygenate apparatus, backflow sump pump, high frequency waves device, alternating magnetic field generator, standing field producer, stone flour, PAM, Tai-Ace S 150: Q=12 ton (considering daily variation factor 1.33) test water quality: COD:5000-10000mg/l BOD 5: 2000-4000mg/l NH 3-N:700-1350mg/l
The SS:500-700mg/l main result:
Anaerobic system unit debug results
The anaerobism debugging principle
Anaerobic system mainly relies on degrade organic pollutant in the garbage leachate of anaerobion.Its principle of work be sewage from the reactor bottom water distribution, be upward through sludge blanket, this sludge blanket is the granule sludge that is formed by anaerobion, usually, the concentration of this sludge blanket can reach 30g/l.When oozing drop liquid by sludge blanket, organic pollutant is wherein decomposed by anaerobion, forms CH 4And CO 2, make the COD and the BOD that ooze drop liquid 5Deng being minimized.Anaerobic process are to NH 3Not high with total phosphorus and removal rate of heavy metal, general only by the small portion content in the sludge drainage system reduction water.
Debug the unloading phase of anaerobism
The anaerobic effect depends primarily on the Rational structure of the water distribution system of the triphase separator on its top and bottom, and to form good sludge blanket, this mud can mode such as separation and Culture or inoculation culture, inoculation domestication obtain from ooze drop liquid.If but only relied on former water planting to support, the cycle of startup would generally have needed more than 3 months, adopted the method for inoculation domestication then can shorten start-up period greatly, generally finished in 20~30 days.The mud of inoculation is the fresh dewatered sludge of Hangzhou sewage work digester, adopts the refuse landfill conventional garbage to ooze and adds in reaction tank with submersible sewage pump after drop liquid is mixed all.The about 28m of testing apparatus useful volume 3, add fresh wet mud 6-8t (water ratio about 75%~80%) altogether, add time 36h.After mud added and finished June 13, begin water inlet, the water yield is 200l/h, loads to be 0.1kg (COD)/m 3D, and stable flooding quantity 9 days, the COD load increases to 1.5kg/m 3D, water outlet COD is reduced to about 2500mg/l gradually by 5000mg/l-6000mg/l.Since the 10th day, flooding velocity reached 350l/h, continued to be reduced to 1500mg/l through water outlet COD after 9 days by the 2400mg/l of beginning again; From the 19th day to the 27th day, water inlet 520l/h (12.5m 3/ d), water outlet COD reduces to below the 1300mg/l about by 2000mg/l, and the COD load increases to 3.5kg/m 3D, from the 28th day to the 40th day, the water inlet still be about 520l/h, water outlet COD basicly stable about 1000mg/l (681~1152mg/l), reached steady state, this shows that this pilot scale anaerobism starting period is about 27 days.
Because conditioning groove water outlet pH value is all about 8.0, VFA and pH value influence lessly between the starting period to anaerobism, thereby do not regulate the pH value or add medicament in this stage, the unloading phase test-results list in table 1.
The test result unloading phase of table 1 anaerobic system
Water inlet COD (mg/h) Water outlet COD (mg/h) Clearance (%)
??200l/h ?6.12~6.21 ??5300~8100 ??2600~4900 ??30~53
??350l/h ?6.22~6.39 ??2000~9120 ??1350~2700 ??24~71
??520l/h ?7.1~7.8 ??3700~6400 ??1300~1930 ??49~74
The design discharge test
Anaerobic system carries out design discharge test and begins after the starting period finishes, and from July 9 to July 22 days, last 14 days altogether, test situation is as follows:
Amount of inlet water: 12.5m 3/ h (520l/h)
Influent quality: COD2276~8834mg/h
Effluent quality: COD681~1152mg/l
COD load: 2.1~3.8kg/m 3D hydraulic detention time: about 2.3d operating performance:
COD clearance: 51%~87%, average 81%
BOD 5Clearance: 92%~97%, average 96%
NH 3-N clearance :-7%~21%, average 11%
SS clearance :-32%~80%, average 32%
PH value: 7.6~8.20
Test run result during table 2 anaerobic system design discharge
Time Water inlet (mg/l) Water outlet (mg/l) Clearance (%)
??COD ??BOD 5 ?NH 3-N ?SS ?COD ?BOD 5 ?NH 3-N ?SS ????COD ???BOD 5 ?NH 3-N ??SS
?7.9 ?5270 ??4010 ??- ?56 ?1046 ?212 ???- ?75 ????81 ????95 ????- ??-33
?7.10 ?7282 ??- ??898 ?67 ?998 ?- ???712 ?23 ????86 ????- ????21 ??34
?7.11 ?5892 ??3170 ??- ?120 ?1005 ?244 ???- ?106 ????83 ????92 ????- ??12
?7.12 ?5394 ??- ??832 ?146 ?1152 ?- ???706 ?66 ????79 ????- ????15 ??45
?7.13 ?2276 ??- ??- ?- ?1115 ?- ???- ?- ????51 ????- ????- ??-
?7.14 ?6220 ??- ??821 ?40 ?1004 ?- ???699 ?24 ????84 ????- ????15 ??40
?7.15 ?5395 ??2618 ??- ?44 ?1013 ?129 ???- ?28 ????81 ????95 ????- ??54
?7.16 ?7485 ??- ??1080 ?117 ?998 ?- ???828 ?32 ????87 ????- ????23 ??63
?7.17 ?8834 ??3212 ??- ?- ?1020 ?54 ???- ?- ????88 ????98 ????- ??-
?7.18 ?4813 ??- ??839 ?126 ?1040 ?- ???853 ?59 ????78 ????- ????-1 ??53
?7.19 ?5020 ??3820 ??- ?- ?873 ?94 ???- ?- ????82 ????97 ????- ??-
?7.20 ?6230 ??2750 ??- ?166 ?907 ?102 ???- ?60 ????85 ????96 ????- ??74
?7.22 ?5355 ??3767 ??- ?121 ?681 ?94 ???- ?25 ????87 ????97 ????-7 ??80
The pilot scale normal operation period, we have carried out the biophase observation to 40 times of biomicroscopes of the sampling of the mud in anaerobism employing.The microscopy result shows that anaerobic sludge mostly is coccus and bacillus, and crumb structure is more obvious, shows that granule sludge forms.
The influence test that influent quality changes the clearance effect shows, when anaerobic system water inlet during at COD5200~9000mg/l, the COD clearance is stabilized in about 83%.
The anti-shock loading test
According to the pilot scale requirement, water yield variation factor is 1.33, and pollution load variation factor 1.13 (expressing with change in concentration) has carried out 10 days proof test.Table 4-3 is a water yield variation factor 1.33, the test-results when promptly pressing flooding quantity 700l/h, the effect when Fig. 4-3 and Fig. 4-4 is load variations.Test-results shows that Technology and equipment that design is selected for use have the ability of bearing the water yield and water quality impact variation more by force, can reach contracted requirement.
Table 4-3 water yield variation factor is 1.33 o'clock anaerobic system test-results
???????????COD ?????????????BOD 5 ?????????????NH 3-N ?????????????SS The pH value
Water inlet Water outlet Clearance Water inlet Water outlet The removal dish Water inlet Water outlet Clearance Water inlet Water outlet Clearance Water inlet Water outlet
7.23 ~ 8.1 ?4857 ?~ ?7782 ?632 ?~ ?1050 ?84 ?~???? ?92????? ????3080 ????~?? ????5060 68 ~ 104 ?96 ?~ ?98 ??658 ??~ ??1108 ?600 ?~ ?910 ??20 ??~ ??38 ??56 ??~ ??248 ??32 ??~ ??243 ????7.6 ????~ ????8.2 ????7.6 ????~ ????8.0
On average ?7180 ?840 ?88 ????3847 80 ?97 ??1035 ?760 ??27 ??151 ??102 ?32
Calculate by above-mentioned load, anaerobism design volumetric loading can reach 4kgCOD/m 3More than the d.Gone up as seen by table, when the water yield improves (Q=700L/h), intake actual COD when the 6800mg/L left and right sides, water outlet COD is all about 800mg/L.The observation of anaerobic system influence factor
(1) the pH value changes and influence
Anerobic sowage biochemistry is having relatively high expectations to the pH value generally speaking, suitable value is 6.8~7.8, the pH value of oozing drop liquid during this pilot scale is stabilized in 7.6~8.2 basically, according to observations when the pH value 8.10 when following, the COD water outlet generally all is stabilized in below the 1100mg/l, occurs pH value 〉=8.10 o'clock once in a while, water outlet COD reaches 1500~1900mg/l, but most of the time pH value is all below 8.10, and therefore, the pH value of oozing drop liquid influences not clearly anaerobic system.
(2) temperature is to the influence of anaerobism operating performance
The sewage biochemical treatment also has certain requirement to temperature, and for the normal temperature anaerobic biological, the temperature of general requirement water when water temperature relative variation of effect during less than 20 ℃, is lower than 15 ℃ of anaerobion activity and reduces greatly about 25 ℃.During this pilot scale daytime and evening the temperature difference reach 3 ℃~5 ℃, the variation of this temperature difference has corresponding influence to anaerobic methane production tolerance, daytime, gas production rate generally was night (containing morning) 1.5 times of gas production rate, 2 times of Gao Shida (at 3 o'clock in noon to afternoon).This test gas production rate night and morning about 0.4~1.2m 3/ m 3(water), daytime gas production rate 1.0~2.4m 3/ m 3(water).
Because water quality sampling is generally in the morning 8 o'clock to 8: 40 in the process of the test, therefore can find out that according to daily monitoring result anaerobism is when temperature Change, to COD, BOD 5Clearance influence little, all much better than design load.According to the investigation to process unit operation of the same type, even in the winter time, as long as the water inlet water temperature reaches 18 ℃, the clearance of COD still can guarantee more than 60%.
(3) NH 3The influence of-N and TP
General biochemical treatment has the certain proportion requirement to the C in the water, N, P, be generally 100: 5: 1, in the pilot scale process, originally ooze that drop liquid shows as the N height, P is low, C: N: P is 10~30: 5: 0.03~0.08, this shows, should add phosphoric by normal requirement, but in the actual motion, anaerobism is not the ten minutes needs to the demand of phosphorus, therefore, the anaerobism water inlet needn't add phosphorus specially.In addition, NH 3-N concentration also has certain restraining effect to microorganism growth, this pilot scale operational process NH during greater than 1000mg/l 3-N concentration is general all to be changed at 726~1300mg/l, and that TP is 7.8~17mg/l is obviously on the low side, to anaerobic COD and BOD 5Removal effect almost do not have influence.This shows NH in this pilot scale process 3-N, TP are less to the influence of anaerobic treatment effect.
Decomposing pool single test result
The startup of decomposing pool system
Decomposing pool equipment transported the scene to July 6 to carry out equipment installation, pipe installation and electrical equipment and is installed on and July 10 finished and began the 25m of intaking 3, commissioning device and equipment carried out local rectification then; Began to intake July 13 and carry out the test of resolving time and effect.Former water influent concentration is 3980mg/L, enters after the first road decomposing pool operation to decompose 5 days continuously altogether.The COD treatment effect sees Table 4-4.
The treatment effect unloading phase of table 4-4 decomposing pool system
Project Water inlet One day Two days Three days Four days Five days
Look, smell flavor Black, smelly Reddish brown Reddish brown Reddish brown Dark brown Dark brown
Smelly Substantially tasteless Substantially tasteless Substantially tasteless Substantially tasteless
?pH ??8.30 ??8.34 ????8.42 ????8.58 ????- ????-
?COD Cr(mg/L) ??3980 ??2400 ????1713 ????1305 ????972.5 ????929.8
?BOD 5(mg/L) ??2906 ??- ????- ????- ????33.33 ????-
?SS(mg/L) ??227.5 ??- ????- ????- ????- ????-
As can be seen from the above table, apparent in view to the water inlet treatment effect after the first road decomposing pool operation, decompose that the COD clearance is 76.6% after 5 days, BOD 5Decomposing clearance on the 4th is 98.9%.Decomposing pool COD clearance and resolving time relation are seen Fig. 4-6.
The design discharge test
Decomposing pool decomposes after 5 days continuously, intakes continuously since 14 o'clock on the 17th July in 2002 and tests by the flow of design code.According to design code influent concentration COD CrBe 3200mg/L, because of the scene does not have satisfactory water source, still adopt water and the anaerobism water outlet proportioning water inlet by a certain percentage that settles out of first landfill yard one, water inlet COD CrConcentration is controlled at 3200mg/L.The all stage test lasts 17 days, and to end of day in Augusts 3, the test basic condition is as follows:
Test period: on August 3rd, 1 2002 on July 17th, 2002
Day output: 12.5m 3/ d (520L/h)
Water inlet COD mean concns: 3305mg/L
Water outlet COD mean concns: 536.9mg/L
The average removal rate of COD has reached 83.75%
The decomposing pool residence time: 48h
Running cost: 6.35 yuan/m 3
The design discharge test-results sees Table 7-5.As can be seen from the table, decomposing pool is more obvious to the treatment effect of water inlet.
Table 4-5 design discharge decomposing pool pilot scale result table
The pollutent index Water inlet The decomposing pool water outlet The settling tank water outlet Average removal rate (%)
Look, smell flavor Black, smelly Dark brown, substantially tasteless Greyish white, substantially tasteless ????-
??pH ????7.69-8.10 ??8.18-8.50 ??7.45-7.75 ????-
??COD Cr(mg/l) ????2516-4134 ??741-1051 ??365-838 ????83
??BOD 5(mg/l) ??1000-1300 ????28-50 ????20-50 ????97
??SS(mg/l) ??22-280 ????50-268 ????0-50 ????82
??NH 3-N ??800-1013 ????664-842 ????608-809 ????22
The traffic load shock test
The design discharge pilot plant test carries out the traffic load shock test since 9: 40 on the 4th August in 2002 after finishing, flow attack coefficient 1.33, day processing 16.6m 3/ d (700l/h).Test in end of day in Augusts 13, last 10 days.The test basic condition is as follows:
Test period: on August 13rd, 1 2002 on August 4th, 2002
Day output: 16.6m 3/ d (700l/h)
Water inlet COD mean concns: 3362mg/l
Water outlet COD mean concns: 657.4mg/l
The average removal rate of COD has reached 80.45%,
The decomposing pool residence time: 36h
Running cost: 6.55 yuan/m 3
The traffic load Impulse Test Result sees Table 4-6.
Table 4-6 traffic load is impacted decomposing pool technology pilot scale result table
The pollutent index Water inlet The decomposing pool water outlet The settling tank water outlet Total clearance (%)
Look, smell flavor Black, smelly Dark brown, substantially tasteless Greyish white, substantially tasteless ????-
??pH ??7.68-7.98 ????7.94-8.30 ??6.9 ????8.0
??COD Cr(mg/l) ??2814-3778 ????940.6-1346 ??522-883 ????80
??BOD 5(mg/l) ??1840 ????199 ??95 ????95
??SS(mg/l) ??10-140 ????100-200 ??0-98 ????60
??NH 3-N(mg/l) ??912-1130 ????882-1020 ??775-962 ????15
Anaerobism+decomposing pool Combined Trials
Begin to carry out anaerobism+decomposing pool process integration test 17 o'clock on the 13rd August, promptly directly intake, flooding velocity control 16.6m from anaerobism 3/ d (700l/h).Test in end of day in Augusts 22, last 11 days.The test basic condition is as follows:
Test period: on August 22nd, 1 2002 on August 13rd, 2002
Day output: 16.6m 3/ d (700l/h)
Anaerobism water inlet COD mean concns: 5000mg/l
Decomposing pool water outlet COD mean concns: 480mg/l
Anaerobism hydraulic detention time: 40h
Decomposing pool hydraulic detention time: 36h
The discharge in water device is closed down, and jet-pump is closed down one group under water, and negative oxygen ion " B " was opened 4 hours, stops 1 hour, and all the other equipment normally move.Power consumption 85kWh/d (5.1kWh/m 3)
Direct operating cost: 5.78 yuan/m 3(AMT4.49 unit/m wherein 3)
Test-results sees Table 7-7.
Table 7-7 anaerobism+decomposing pool Combined Trials pilot scale result table
The pollutent index Water inlet The anaerobism water outlet The decomposing pool water outlet The settling tank water outlet Total clearance %
Look, smell flavor Black, smelly Weak smelly Dark brown, substantially tasteless Greyish white, substantially tasteless
?PH ??7.7-8.02 ??7.85-7.92 ????8.19-8.31 ??7.70-8.14
?COD(mg/l) ??3869-6468 ??656-950 ????576-692 ??310-430 ????92
?BOD 5(mg/l) ??1195-2630 ??93-116 ????64 ??29 ????98
?SS(mg/l) ??30-244 ??47-150 ????36-104 ??0-102 ????62
?NH 3-N(mg/l) ??751-1013 ??664-790 ????625-660 ??600-625 ????26
Conclusion:
Combined Trials by anaerobism and decomposing pool illustrates anaerobism+decomposition technique, and just UAMD technology is advanced, reasonably.Working cost is suitable with biochemical process treating refuse percolate, but the water outlet effect will obviously good and biochemical process.

Claims (9)

1, a kind of percolate anaerobism molecular breakdown method is characterized in that this method comprises the steps:
(1) predecomposition step: percolate is united through high frequency waves, electromagnetic field, electronics and stationary magnetic field and is carried out predecomposition;
(2) anaerobism step: the predecomposition liquid that obtains is previously effectively removed organic pollutant and is made its mineralising through the anaerobic treatment of the entrained microbial population of different activities mud;
(3) decomposing oxidation step: the percolate after the anaerobic treatment passes through the combined action of high frequency waves, electromagnetic field, electronics, stationary magnetic field, hydroxyl ion and/or ozone again, thus thorough degradation of contaminant;
(4) adsorption step: the percolate behind the decomposing oxidation is the low molecule organic pollutant of ionic species or polar form again with adsorbents adsorb;
(5) step of flocculation precipitation: the percolate after the absorption adds flocculation agent and precipitates;
(6) filtration step: the percolate that has flocculated filters, and obtains desired waste liquid.
2, method according to claim 1, it is characterized in that the predecomposition step carries out in the predecomposition unit, this unit by two independently decomposing pool (27) compose in parallel, decomposing pool passes through pipe connection between (27), this decomposing pool (27) bottom is provided with water circulating pump (23), water circulating pump (23) is extracted the circulating sewage of decomposing pool out by pipeline (20), wherein a part of sewage turns back in the decomposing pool (27) through pipeline (29) circulation, pipeline (29) is laid along decomposing pool (27) outer wall, and link to each other with the water sprayer (24) that is provided with on decomposing pool (27) outer wall, sewage is injected in the water by water sprayer (24), another part sewage enters tank (28) through threeway again, this tank (28) is installed in the decomposing pool pond along last, tank inside is equipped with the high frequency waves producer (26) and the electronic generator (25) of stack or parallel placement, in decomposing pool (27) bottom stationary magnetic field producer (21) and electromagnetic field generator (22) are set, electromagnetic field generator (22) places in the middle of decomposing pool (27) bottom, and stationary magnetic field producer (21) places electromagnetic field generator (22) both sides.
3, method according to claim 1, it is characterized in that described anaerobism step carries out in anaerobic unit, this anaerobic unit structure is as follows: sewage pump (510), by pipeline (56), link to each other with the low density water-distributing device (52) that is installed in anaerobic pond (58) bottom, it on this device (52) anaerobic pond (58) body, on this anaerobic pond (58) top high-effect triphase separator (51) has been installed, its anaerobic unit top is equipped with water-sealed tank (53), biogas effuser (55), anaerobic unit are divided into two groups of ponds, and shelter bridge (59) is arranged between two groups of ponds, in order to overhaul facility, hand-hole (54) is set respectively at anaerobic pond top and bottom.
4, method according to claim 1, it is characterized in that the decomposing oxidation step carries out in the decomposing oxidation unit, its decomposing oxidation unit is divided into 4 independent decomposing oxidation ponds (69) in parallel, each decomposing pool is communicated with by pipeline between (69), on decomposing oxidation Chi Chi edge, tank (60) is installed, tank inside is equipped with high frequency waves producer (66) and electronic generator (65), at decomposing oxidation Chi Lingyicechi along ozonizer (62) is installed, hydroxyl ion producer (61), oxygenate apparatus is installed in the air blast machine room, between each decomposing pool unit gallery is set, the ozone pipeline is laid along the decomposing pool exterior wall, and the self-priming water sprayer (611) that is provided with on exterior wall links to each other, simultaneously the waste pipe of recycle pump is also laid along exterior wall, also links to each other with the another one interface of the self-priming water sprayer (611) that is provided with on the exterior wall; Hydroxyl ion producer (61) pipeline is laid along decomposing pool intermediary gallery, and electromagnetic field generator (64), magnetic field generator (63), electronic generator (65) are arranged on the bottom in pond.
5, according to claim 2 or 4 described methods, it is characterized in that the stationary magnetic field producer is by sewage import (31), air or ozone gas import (32), water sprayer (33), horizontal mixing tube (34), diffusion of moisture pipe (35) and permanent magnet (36) are according to shown in Figure 3 rearranging, air or ozone gas import (32) become 165 jiaos with stationary magnetic field producer axle, water sprayer (33) is the hydraucone shape, inlet diameter is 1: 2 with the ratio of exit diameter, each permanent magnet (36) is made of eight alnico magnets, the magnetic field of magnets direction is identical, magneticstrength 4000-6000Gs.
6, according to claim 2 or 4 described methods, it is characterized in that electromagnetic field generator is made up of A/C alternation magnet and coil (41), stainless steel shake plate (42), magnet (43), joint pin (44) and supply lead, its magneticstrength is more than the 4000Gs.
7, method according to claim 4 is characterized in that the hydroxyl ion producer is made up of with power interface (76) inlet mouth (71), shell (72), high-tension circuit plate (73), discharge prong (74), hydroxyl ion air outlet (75).
8, method according to claim 1 is characterized in that stone flour, zeolite or molecular sieve that described sorbent material was made up of according to weight ratio graphite and convex-concave rod stone in 1: 0.1 to 0.2: 1.
9, method according to claim 6 is characterized in that the stone flour that described sorbent material was made up of according to weight ratio graphite and convex-concave rod stone in 1: 0.1 to 0.2: 1.
CNB031097545A 2003-04-16 2003-04-16 Anaerobic moleculer decomposing method of refuse percolate Expired - Fee Related CN1179896C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345775C (en) * 2005-10-13 2007-10-31 复旦大学 Urban sewage treatment of anaerobic biological-low voltage electric field oxidizing coupling system
CN102139996A (en) * 2011-03-23 2011-08-03 北京沁润泽环保科技有限公司 Integral treatment process for rural garbage seeping liquid
CN102276035A (en) * 2011-07-20 2011-12-14 安徽省通源环境节能有限公司 Processing method for garbage leachate and processing apparatus thereof
CN101219841B (en) * 2006-11-30 2012-11-28 首都圈埋立地管理公社 Method for purifying leachate of landfill and dewatering water of food waste
CN103880245A (en) * 2014-03-19 2014-06-25 北京博力扬环保科技有限公司 Method for processing landfill leachate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345775C (en) * 2005-10-13 2007-10-31 复旦大学 Urban sewage treatment of anaerobic biological-low voltage electric field oxidizing coupling system
CN101219841B (en) * 2006-11-30 2012-11-28 首都圈埋立地管理公社 Method for purifying leachate of landfill and dewatering water of food waste
CN102139996A (en) * 2011-03-23 2011-08-03 北京沁润泽环保科技有限公司 Integral treatment process for rural garbage seeping liquid
CN102139996B (en) * 2011-03-23 2012-07-25 北京沁润泽环保科技有限公司 Integral treatment process for rural garbage seeping liquid
CN102276035A (en) * 2011-07-20 2011-12-14 安徽省通源环境节能有限公司 Processing method for garbage leachate and processing apparatus thereof
CN103880245A (en) * 2014-03-19 2014-06-25 北京博力扬环保科技有限公司 Method for processing landfill leachate
CN103880245B (en) * 2014-03-19 2015-07-29 北京博力扬环保科技有限公司 A kind for the treatment of process of percolate

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