CN203474561U - Treatment equipment of landfill leachate - Google Patents
Treatment equipment of landfill leachate Download PDFInfo
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- CN203474561U CN203474561U CN201320546092.4U CN201320546092U CN203474561U CN 203474561 U CN203474561 U CN 203474561U CN 201320546092 U CN201320546092 U CN 201320546092U CN 203474561 U CN203474561 U CN 203474561U
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Abstract
The utility model provides treatment equipment of landfill leachate. The treatment equipment comprises a reaction tank, a dosing device and a solid-liquid separation device, wherein the reaction tank is used for receiving biochemical effluent; the dosing device is connected to the reaction tank and is used for feeding hydroxide to the reaction tank to adjust the pH value in the reaction tank to below 10.5, so that the biochemical effluent is subjected to chemical reaction; the solid-liquid separation device is connected to the reaction tank. The solid-liquid separation device carries out solid-liquid separation on the reacted biochemical effluent, so as to obtain clear liquid.
Description
Technical field
The utility model relates to the processing to percolate, relates in particular to the processing to the water outlet of percolate biochemical process.
Background technology
Percolate be rubbish stack and landfill process in owing to fermenting and the shower of rainwater, washing away and the immersion of surface water, underground water the sewage caught on a filter by extraction, hydrolysis and fermentation.Percolate is to produce one of principal element of secondary pollution in garbage loading embeading process, and water body, soil, atmosphere and biology are had to impact in various degree, if do not deal carefully with, directly discharge, will cause severe contamination to environment.
Than conventional waste water, the features such as percolate has that complicated component, water quality and quantity change greatly, organism and ammonia nitrogen concentration is high, the imbalance of microbial nutrition element ratio.The treatment process of most percolate is mainly the combination of biological process, physico-chemical process, land law and this several method.Along with the development of refuse leachate treatment technology, percolate is processed main process and is reached its maturity, and " anaerobism+biochemical MBR+NF/RO " become main flow technique.
Why in RO(reverse osmosis) carry out NF(nanofiltration before processing) process, reason is much higher hard in the sewage after biochemical treatment, easily fouling in reverse osmosis system.Therefore, first bio-chemical effluent is carried out to nanofiltration processing to remove the divalent ion in water.But the producing water ratio of nanofiltration system is about 80%, the producing water ratio of reverse osmosis system is about 70%, thereby whole producing water ratio is only 50%-60%.Low producing water ratio also correspondingly causes too high dense aquatic products amount, makes dense water treatment difficulty greatly increase and cannot all reclaim.In addition, nanofiltration and reverse osmosis are easily stopped up, and need to clean continually nanofiltration membrane and reverse osmosis membrane, have also reduced the work-ing life of film.
Therefore, this area is needed the percolate treating process of a kind of high yield water rate, high effluent quality badly.
Utility model content
Below provide the brief overview of one or more aspects so that the basic comprehension to these aspects to be provided.Detailed combine of this not all aspect contemplating of general introduction look at, and neither the also non-scope of attempting to define any or all aspect of the key or decisive key element that is intended to point out out all aspects.Its unique object is the order that some concepts that will provide in simplified form one or more aspects are thought the more detailed description providing after a while.
According to one side of the present utility model. a kind of equipment of the bio-chemical effluent for the treatment of percolate is provided, has comprised: reactive tank, this reactive tank is used for receiving this bio-chemical effluent; Be connected to the chemicals dosing plant of this reactive tank, this chemicals dosing plant regulates more than pH value to 10.5 so that this bio-chemical effluent generation chemical reaction for add oxyhydroxide to this reactive tank; And the equipment for separating liquid from solid that is connected to this reactive tank, this equipment for separating liquid from solid is carried out solid-liquid separation to obtain clear liquid to reacting rear bio-chemical effluent.
In one embodiment, this chemicals dosing plant comprises calcium hydroxide pharmacy slot and calcium hydroxide volume pump, and this calcium hydroxide volume pump is from this calcium hydroxide pharmacy slot to this reactive tank pumping calcium hydroxide so that this bio-chemical effluent generation chemical reaction.
In one embodiment, this chemicals dosing plant comprises sodium hydroxide medicament groove and sodium hydroxide volume pump, and this sodium hydroxide volume pump is from this sodium hydroxide medicament groove to this reactive tank pumping sodium hydroxide so that this bio-chemical effluent generation chemical reaction.
In one embodiment, this chemicals dosing plant comprises iron trichloride pharmacy slot and iron trichloride volume pump, and this iron trichloride volume pump is from this iron trichloride pharmacy slot to this reactive tank pumping iron trichloride so that this bio-chemical effluent generation chemical reaction.
In one embodiment, this equipment for separating liquid from solid comprises filter vat, in this filter vat, by microfiltration membrane, bio-chemical effluent after this reaction is filtered.
In one embodiment, this microfiltration membrane or ultra-filtration membrane comprise eptfe membrane.
In one embodiment, this equipment for separating liquid from solid comprises settling process tripping device or By Bubble-floating Method tripping device.
In one embodiment, this equipment also comprises the treatment of mud device that is connected to this reactive tank and this equipment for separating liquid from solid, this treatment of mud device carries out processed to the mud of discharging from this equipment for separating liquid from solid, and the pressing filtering liquid that dehydration is obtained is transmitted back to this reactive tank.
In one embodiment, this treatment of mud device comprises: slurry collecting groove, and this slurry collecting groove is collected the mud from this equipment for separating liquid from solid; Slurry thickening device, mud is pumped to this slurry thickening device from this slurry collecting groove and carries out thickening; And pressure filter, the mud after thickening is pumped to this pressure filter and carries out press filtration, and this pressing filtering liquid obtaining is transferred back this reactive tank.
In one embodiment, this equipment also comprises: be connected to the degassing vessel of this equipment for separating liquid from solid, this degassing vessel receives clear liquid from this equipment for separating liquid from solid; And the hydrochloric acid pharmacy slot and the hydrochloric acid volume pump that are connected to this degassing vessel, this hydrochloric acid volume pump mixes to regulate the pH value of clear liquid to neutral slant acidity or meta-alkalescence from this hydrochloric acid pharmacy slot pumping hydrochloric acid with clear liquid, the carbon dioxide of generation is removed in degassing vessel.
According to of the present utility model, also provide a kind of system for the treatment of percolate more on the one hand, having comprised: biochemical processing device, this biochemical treatment apparatus is for processing to produce bio-chemical effluent to this percolate; As the above-mentioned equipment for the treatment of this bio-chemical effluent; And reverse osmosis equipment, for this clear liquid is carried out to reverse-osmosis treated.
Accompanying drawing explanation
After reading in conjunction with the following drawings the detailed description of embodiment of the present disclosure, can understand better above-mentioned feature and advantage of the present utility model.In the accompanying drawings, each assembly is not necessarily drawn in proportion, and the assembly with similar correlation properties or feature may have identical or close Reference numeral.
Fig. 1 shows the schema of the garbage leachate treatment process of prior art;
Fig. 2 shows according to the schema of the technique of the treating refuse percolate bio-chemical effluent of one side of the present utility model;
Fig. 3 shows according to the schema of the garbage leachate treatment process of one side of the present utility model;
Fig. 4 shows according to the schema of the method for the treating refuse percolate of one side of the present utility model; And
Fig. 5 shows according to the block diagram of the equipment for the treatment of percolate bio-chemical effluent of one side of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.Note, the aspects of describing below in conjunction with the drawings and specific embodiments is only exemplary, and should not be understood to protection domain of the present utility model to carry out any restriction.
Fig. 1 shows the garbage leachate treatment process of prior art.As shown in the figure, the percolate that garbage loading embeading district produces imports equalizing tank through special-purpose conduit, and percolate obtains homogeneous and all measures in equalizing tank.Before percolate is carried out to biochemical treatment, can carry out preliminary pre-treatment to it.For example, in mixing/reaction tank, add special bacterial classification and medicament, can produce anaerobism and facultative anaerobic biochemical reaction, can remove a part of CODcr, BOD5 and NH4+-N, to alleviate the load of subsequent disposal.The sewage flowing out from mixing/reaction tank, by vertical sedimentation tank, is isolated solid impurity, afterwards percolate is carried out to biochemical treatment.
Biochemical treatment mainly comprises anaerobism and A/O(aerobic/anaerobic) process.Anaerobic treatment refers under the condition of free-dioxygen by the anaerobion effect of (comprising facultative microbe), various complicated organic substance decomposings in percolate is changed into the process of the materials such as methane and carbon dioxide.Anaerobic treatment is carried out in anaerobic reactor, most widely used, technique is the most ripe comprises upflow anaerobic sludge blanket reactor (UASB) and anaerobism fixed bed (anaerobic filter AF).For example, percolate, after UASB anaerobic reactor is processed, can be removed COD(chemical oxygen demand (COD)) reach 60～90%, the non-ammonia-state nitrogen in percolate is converted into ammonia-state nitrogen, has part NH4+-N to be removed simultaneously.The biogas recoverable producing, for example, for marsh gas power generation.The water outlet of anaerobic treatment enters A/O system, and excess sludge, by active sludge pipe, enters sludge thickener.
A/O technique is anaerobic-aerobic activated sludge process.A/O biochemistry pool is comprised of preposition A section (anaerobism section) and O section (aerobic section).After anaerobic treatment, the aerobic biodegradability of percolate strengthens greatly.Percolate, in the process of difference in functionality subregion of flowing through, is removed organism, nitrogen in sewage.A/O technique can effectively suppress hyphomycetic breeding under the condition of the preposition operation of anaerobism, overcomes sludge bulking, SVI(sludge index) value is generally less than 100, is conducive to process the separated of rear sewage and mud, the gentle agitation that only needs in anaerobism section in service.Because anaerobic and aerobic are strictly distinguished, be conducive to the breeding growth of different microorganisms simultaneously.A/O technique is the Technology of Sewage of the extensive employing of sewage disposal, and technique is flexible, stable, respond well, and can possess longer mud age, meets nitrated-denitrifying process characteristic of denitrogenating.
A/O water outlet is separated through device for separating mud and water, and advanced treatment can be further done in the water outlet after separation.Traditionally, can to A/O water outlet, carry out mud-water separation by second pond.But there is the shortcomings such as water outlet is stable not, the easy expansion of mud as traditional water technology of device for separating mud and water in second pond.At present main flow ground is by MBR(film biochemical reactor) treatment technology, external placed type MBR for example, to A/O effluent adopting external pipe type ultrafiltration system, as shown in the figure.The advantage such as MBR treatment technology has that contaminant removal efficiency is high, effluent quality good, anti impulsion load, sludge discharge are little.
To the water outlet after biochemical treatment (hereinafter referred to as, bio-chemical effluent), can do further advanced treatment.Reverse-osmosis treated is the core to bio-chemical effluent advanced treatment, and it can finally guarantee the quality stability of water outlet, therefore, is applied in percolate and processes in engineering as end process, as shown in the figure.Reverse osmosis is a kind of reverse locomotory movement of infiltration, is a kind of under pressure-driven, the separation method solute in solution and solvent being separated by means of the selective retention effect of semi-permeable membranes, the purification that is widely used in various liquid with concentrate.Reverse osmosis film used is called semi-permeable membranes, its about 2nm of micro-pore diameter.Can only pass through water (or organic solvent), can not be by the material of salt and other dissolvings.Therefore its most general application example is in water technology, with reverse osmosis technology by Impurity removals such as the mineral ion in former water, bacterium, virus, organism and colloids, to obtain high-quality pure water.
The filtration runner of reverse osmosis membrane is generally at 28mil, and microorganism is once at this amount reproduction, will stop up the runner of film, to such an extent as to the water production rate of reverse osmosis declines to a great extent.In order to make the operation that system is more stable, reverse osmosis system comprises that sterilant throwing device adds sterilant with impact type.In percolate, contain heavy metal as cadmium, nickel, zinc, copper, chromium and lead etc., these metal ions are concentrated through films, exceed its solubleness in water, will separate out and be deposited on film on surface, and plugging hole, causes the decline of membrane flux.In order to prevent the appearance of this situation, reverse osmosis system comprises that scale inhibitor feeding device is to add Scale inhibitors in the water inlet of reverse osmosis, to slow down, to stop separating out of difficulty soluble salt.In order to process the macrobead of very not bringing into before holding back, to prevent it, enter reverse osmosis system, reverse osmosis system also can comprise cartridge filter, such as 5 μ cartridge filters.This particle may puncture reverse osmosis membrane assembly after high-pressure pump is accelerated, and causes the situation of a large amount of leakage salt, scratches the impeller of high-pressure pump simultaneously.The effect of high-pressure pump is for reverse osmosis provides enough intake pressures, guarantees the normal operation of reverse osmosis membrane.According to the characteristic of reverse osmosis itself, need there is certain impellent to remove to overcome the resistances such as osmotic pressure, guarantee reaches the designing treatment water yield.Finally, reverse osmosis system also comprises auto-flushing and chemical cleaning system.Higher owing to entering the content of water pollutant; therefore when shutting down; the pollutent of the dense water side of film can be deposited in RO film surface; and because the saltiness of the dense water side of RO film is very high; RO film can lose the reverse osmotic pressure of balance with it, and the fresh water that RO film sees through water side can blot and make the grievous injury of pair of films.Therefore, when high-pressure pump is out of service, should open flushing arrangement, by medicine and the dirt in water inlet displacement RO film, thus protective membrane, this operating process can, by Controlling System time variable control, automatically perform.Chemically-cleaning device is for the regular matting of RO film, to extend the work-ing life of RO film.
Owing to containing a large amount of hardness ionses in bio-chemical effluent, therefore for example calcium ion, magnesium ion, if directly carry out very easily fouling of reverse-osmosis treated.Therefore, generally before reverse osmosis system, add nanofiltration system to remove hardness ions, but cause the also frequent fouling of follow-up reverse osmosis membrane to magnesium ion rejection is very low.The producing water ratio of nanofiltration system is about 80%, and this has limited final producing water ratio.Low producing water ratio also correspondingly causes too high dense aquatic products amount.And nanofiltration itself and reverse osmosis be easily fouling and obstruction also, need to clean continually nanofiltration membrane and reverse osmosis membrane, improved cost the work-ing life that has also reduced film simultaneously.
For this reason, the utility model proposes a kind of novel process that the bio-chemical effluent of percolate is carried out to advanced treatment.In the bio-chemical effluent of percolate, the content of pollutent is as follows:
From above-mentioned pollutant load, in the bio-chemical effluent of percolate, contain the hardness ionses such as calcium ion, magnesium ion, this water quality enters as needed advanced treatment, no matter be all to have serious scale problem with reverse osmosis or nanofiltration, while being filtering and concentrating, the hardness such as calcium, magnesium material generates calcium carbonate, magnesium hydroxide polluted membrane surface, cause film processing efficiency to reduce, serious meeting damages RO or NF film.In the utility model, with chemical method, add solid-liquid separation system and replace the hardness ions in nanofiltration system removal bio-chemical effluent, and then enter reverse osmosis system, solved well the problems referred to above.
Traditionally, if adopt chemical method to remove the calcium ion in solution, need to add carbanion, for example, add sodium carbonate, thereby calcium ion is separated out with the form of calcium carbonate.Yet the cost of sodium carbonate is quite high, this processes for this large-scale industry of percolate, and cost is and is high, and this is also why to adopt in processing nanofiltration system with the reason of mode filtering calcium ion physically for current percolate.Yet, mentioned the defect place of nanofiltration system above, the existence of nanofiltration system has affected the producing water ratio that whole percolate is processed, and also has suitable cost simultaneously.
The utility model has utilized the characteristic of the bio-chemical effluent of percolate itself, and percolate bio-chemical effluent is cleared up and produced carbonic acid gas and be dissolved in and in sewage, generate bicarbonate radical (HCO because of biochemical process organism
3 -), for example, 3.41g/L.Calcium ion, the magnesium ion content reviewed in bio-chemical effluent are respectively 351mg/L and 301mg/L.Visible, the content of bicarbonate radical is far above calcium ions and magnesium ions content.For this reason, according to one side of the present utility model, toward adding oxyhydroxide in bio-chemical effluent, the bicarbonate radical in sewage is changed into carbonate, thereby calcium ion can be separated out with the form of calcium carbonate solid particulate, and magnesium ion is separated out with the form of magnesium hydroxide solid particulate, then, by solid-liquid separation, remove the solid particulate of separating out.
According to one side of the present utility model, this oxyhydroxide can be sodium hydroxide, still, can be also calcium hydroxide (being commonly called as white lime).Calcium hydroxide (Ca (OH)
2although) itself also contain calcium ion, but from its chemical formula, therefore calcium hydroxide institute's calcium ions and mol ratio hydroxy are 1:2, and reacting with bicarbonate radical in bio-chemical effluent the carbonate obtaining is enough to the calcium ion of original calcium ion and calcium hydroxide in bio-chemical effluent itself to be separated out with the form of calcium carbonate.Because the cost of white lime is extremely low, therefore, can use white lime.In order there to be better effect, can after adding oxyhydroxide, add for example iron trichloride of a small amount of flocculation agent.This can make the solid granule coacervating large particle of separating out, thereby is convenient to solid-liquid separation.As mentioned above, the bicarbonate radical in routine biochemistry water outlet is enough for separating out calcium ion, but under the more extreme case of calcium ion, also can supplement a small amount of sodium carbonate to guarantee having enough carbonates.Percolate after solid-liquid separation is alkalescence, therefore can add hydrochloric acid or sulfuric acid so that pH value is adjusted to neutral slant acidity or meta-alkalescence, and then enter follow-up reverse osmosis system.
Fig. 2 shows according to the schema of the technique of the bio-chemical effluent of the processing percolate of one side of the present utility model.As shown in the figure, percolate is through biochemical treatment, and the bio-chemical effluent after processing enters in reaction equalizing tank.In reaction, add oxyhydroxide so that pH value is adjusted to higher than 10.5 in equalizing tank, for example 12.For example, can add caustic soda is sodium hydroxide, and also can add more cheap white lime is calcium hydroxide.With this understanding, the bicarbonate radical in reaction tank in sewage can change into carbonate, and forms calcium carbonate granule with the calcium binding in sewage.Magnesium ion in sewage can be combined with hydroxide radical and be formed magnesium hydroxide particle.More preferably, can also add flocculation agent adding outside oxyhydroxide, iron trichloride for example, so that the solid granule of separating out can coacervating large particle.Through fully reaction, for example more than 0.5 hour, the calcium ion in bio-chemical effluent is separated out with calcium carbonate solid particulate, magnesium ion is separated out with magnesium hydroxide solid particulate, and due to the effect of iron trichloride, solid granule can condense into larger particles, thereby be convenient to follow-up solid-liquid separation.Then, abundant reacted percolate is carried out to solid-liquid separation.
Solid-liquid separation can adopt the modes such as settling process, By Bubble-floating Method or filtration method.Filtration method can adopt microfiltration membrane or ultra-filtration membrane to filter.More preferably, can adopt expanded PTFE (EPTFE) film to filter.Penetrating that matter is close, porous, smooth eptfe membrane make solid particulate approaches zero, its low-friction coefficient, chemical stability and ganoid feature make filter pressure only need 0.05～0.1MPa, and the surface of film is very easily cleared up, the clear film time is very of short duration only in second, therefore make filtration procedure reach continuous operation.Pass through solid-liquid separation, the clear liquid obtaining enters follow-up reverse-osmosis treated, and the solid impurity being filtered out removes moisture through dewatering unit such as whizzer, plate-and-frame filter press etc., with the outer venting landfill of dry slag form, the liquid that dehydration obtains returns into equipment for separating liquid from solid and again processes, and there is no outer row.Therefore, than 80% producing water ratio of traditional nanofiltration, chemical method of the present utility model adds solid-liquid separating ring joint and almost reaches 100% producing water ratio, and efficiency is high.
Finally, the clear liquid that solid-liquid separation obtains carries out reverse-osmosis treated.Reverse-osmosis treated generally can realize 70% producing water ratio, can obtain 70% clear liquid, and other 30% dope is made burning disposal.
Fig. 3 shows the garbage leachate treatment process according to one side of the present utility model.The difference of traditional garbage leachate treatment process of describing in this technique and Fig. 1 is the processing to the bio-chemical effluent after percolate biochemical treatment, with chemical method, adds solid-liquid separation system and has replaced the nanofiltration system in traditional technology.Note; the content except chemical method adds solid-liquid separation system shown in Fig. 3; all illustrate in order to describe the utility model exemplary but not restricted contents; for example, except external placed type MBR ultrafiltration system; can adopt built-in MBR ultrafiltration system second pond even the earliest, these are not construed as limiting protection domain of the present utility model yet.Chemical method adds the operation of solid-liquid separation system as described in conjunction with Fig. 2 above.
Fig. 4 shows according to the schema of the method for the treating refuse percolate of one side of the present utility model.In step 402, percolate is carried out to biochemical treatment.Biochemical treatment can comprise anaerobic treatment, A/O processing etc., and carries out solid-liquid separation by MBR ultrafiltration, obtains bio-chemical effluent.In step 404, in the bio-chemical effluent obtaining, add oxyhydroxide to regulate more than pH value to 10.5 so that bio-chemical effluent generation chemical reaction.More preferably, can also add flocculation agent, if iron trichloride is to for example 15mg/L.In the high embodiment of a calcium ion, also can add a small amount of sodium carbonate so that the excessive 0.1g/L of being of carbonate.Through after more than 0.5 hour abundant reaction for example, the calcium ion in bio-chemical effluent, magnesium ion are separated out with the form of calcium carbonate, magnesium hydroxide solid particulate.In step 406, reacted bio-chemical effluent is carried out to solid-liquid separation.Solid-liquid separation can be passed through settling process, By Bubble-floating Method or filtration method.More preferably, can adopt eptfe membrane to carry out solid-liquid separation.Solid-liquid separation is separated into clear liquid and mud by reacted bio-chemical effluent.In step 408, the clear liquid that solid-liquid separation is obtained is carried out reverse-osmosis treated.More preferably, the mud after solid-liquid separation carries out processed through for example whizzer, plate-and-frame filter press, and the liquid obtaining can again be got back to solid-liquid separation and process, and solid impurity is with dry slag, mud cake form landfill or burning.More preferably, in the clear liquid first obtaining in solid-liquid separation, add sulfuric acid or hydrochloric acid to regulate pH value to neutral slant acidity or meta-alkalescence, and then enter reverse-osmosis treated.
Fig. 5 shows according to the block diagram of the equipment 500 for the treatment of percolate bio-chemical effluent of one side of the present utility model.For example, this equipment 500 can be that the chemical method shown in Fig. 3 adds solid-liquid separation system.Equipment 500 can comprise reactive tank 510, and the latter receives the bio-chemical effluent through biochemical treatment from biochemical processing device (not shown).Biochemical processing device is such as comprising anaerobic processing device such as UASB anaerobic reactor, A/O treatment unit such as A/O biochemistry pool and the device for separating mud and water such as external placed type MBR ultra-filtration equipment etc.Equipment 500 also can comprise the chemicals dosing plant that is connected to reactive tank 510, for example calcium hydroxide pharmacy slot 512 and calcium hydroxide volume pump 513a-b and sodium hydroxide medicament groove 514 and calcium hydroxide volume pump 515, as shown in the figure.Calcium hydroxide pharmacy slot 512 can comprise that agitator 511c-d is fully to stir calcium hydroxide.Calcium hydroxide volume pump 513a-b can add calcium hydroxide from calcium hydroxide pharmacy slot 512 to reactive tank 510 accurate quantifications, so that the pH value of reactive tank mesophytization water outlet is adjusted to more than 10.5.Similarly, sodium hydroxide volume pump 515 can add sodium hydroxide from sodium hydroxide medicament groove 514 to reactive tank 510 accurate quantifications, so that the pH value of reactive tank mesophytization water outlet is adjusted to more than 10.5.The sodium hydroxide volume pump 515 that shows calcium hydroxide pharmacy slot 512 and the calcium hydroxide volume pump 513a-b being associated and sodium hydroxide medicament groove 514 in Fig. 5 simultaneously and be associated, yet those skilled in the art can understand, equipment 500 also can only comprise wherein any one.Optionally, chemicals dosing plant also can comprise iron trichloride pharmacy slot 516 and iron trichloride volume pump 517, as shown in the figure.Iron trichloride volume pump 517 can be from iron trichloride pharmacy slot 516 to reactive tank 510 accurate quantification add iron trichloride.Reactive tank 510 can comprise that agitator 511a-b is for carrying out fully stirring to promote reaction to having added the bio-chemical effluent of medicament.Through after more than 0.5 hour abundant reaction for example, the calcium ion in bio-chemical effluent, magnesium ion are separated out with the form of calcium carbonate, magnesium hydroxide solid particulate.Meanwhile, the effect of the flocculation agent playing due to iron trichloride, the particle of separating out can be condensed into larger particles so that separated.In other embodiments, equipment 500 also can comprise sodium carbonate pharmacy slot and the volume pump that is associated to supplement a small amount of sodium carbonate to guarantee having enough carbonates under the more extreme case of calcium ion in bio-chemical effluent.In other embodiments, the flocculation agent chemicals dosing plant that equipment 500 also can comprise other is to substitute iron trichloride pharmacy slot 516 and iron trichloride volume pump 517.
Experiment shows, according to garbage leachate treatment process of the present utility model, has obtained good producing water ratio and effluent quality.Experimental procedure is as follows:
1, get percolate 1000mL and survey that calcium, magnesium, pH value, electricity are led, COD;
2, the NaOH that adds 7.9mL content 15%, adjusts pH=12; Add content 1% iron trichloride 0.3ml, fully stir, react 60 minutes;
3, adopt area 0.03m microfiltration membrane suction filtration, survey that calcium, electricity in suction filtration clear liquid led, pH value, chlorine residue, COD;
4, get 50 liters of percolates and repeat above-mentioned experiment, all clear liquids enter reverse osmosis concentration experiment;
5, get A4 standard RO film and do concentrated experiment, test pressure 0.2Mpa, the water quality while surveying different enrichment factor.
Experimental data is as follows:
| Former water | Microfiltration membrane cleaner liquid | |
| pH | 6.9 | 11.7 |
| Ca(mg/L) | 192 | 20 |
| Mg(mg/L) | 295 | 15.8 |
| Electricity is led (us/cm) | 2.12×10 4 | 2.20×10 4 |
| COD(mg/L) | 641 | 460 |
Table 1---former water and microfiltration membrane cleaner liquid water quality
As shown in Table 1, by chemical method, add solid-liquid separation, the content of calcium ion, magnesium ion reduces greatly, and this is much better than the result of traditional nanofiltration.
* adopting National Standard Method test chart 2---before and after RO is concentrated, waste water quality changes
As shown in Table 2, when 70% rate of recovery, the COD in final outflow water
crcontent is about 23.1mg/L, and TDS is about 863mg/L, even and when 80% rate of recovery, the COD in final outflow water
crcontent also can reach and be about 39.8mg/L, and TDS is about 1370mg/L.Final water quality after RO reverse-osmosis treated has had very big improvement than conventional processes.
Providing previous description of the present disclosure is for making any person skilled in the art all can make or use the disclosure.To various modifications of the present disclosure, will be all apparent for a person skilled in the art, and generic principles as defined herein can be applied to other variants and can not depart from spirit or scope of the present disclosure.Thus, the disclosure is not intended to be defined to example described herein and design, but should be awarded the widest scope consistent with principle disclosed herein and novel features.
Claims (11)
1. for the treatment of an equipment for the bio-chemical effluent of percolate, comprising:
Reactive tank, described reactive tank is used for receiving described bio-chemical effluent;
Be connected to the chemicals dosing plant of described reactive tank, described chemicals dosing plant regulates more than pH value to 10.5 so that described bio-chemical effluent generation chemical reaction for add oxyhydroxide to described reactive tank; And
Be connected to the equipment for separating liquid from solid of described reactive tank, described equipment for separating liquid from solid is carried out solid-liquid separation to obtain clear liquid to reacting rear bio-chemical effluent.
2. equipment as claimed in claim 1, it is characterized in that, described chemicals dosing plant comprises calcium hydroxide pharmacy slot and calcium hydroxide volume pump, and described calcium hydroxide volume pump is from described calcium hydroxide pharmacy slot to described reactive tank pumping calcium hydroxide so that described bio-chemical effluent generation chemical reaction.
3. equipment as claimed in claim 1, it is characterized in that, described chemicals dosing plant comprises sodium hydroxide medicament groove and sodium hydroxide volume pump, and described sodium hydroxide volume pump is from described sodium hydroxide medicament groove to described reactive tank pumping sodium hydroxide so that described bio-chemical effluent generation chemical reaction.
4. equipment as claimed in claim 1, it is characterized in that, described chemicals dosing plant comprises iron trichloride pharmacy slot and iron trichloride volume pump, and described iron trichloride volume pump is from described iron trichloride pharmacy slot to described reactive tank pumping iron trichloride so that described bio-chemical effluent generation chemical reaction.
5. equipment as claimed in claim 1, is characterized in that, described equipment for separating liquid from solid comprises filter vat, in described filter vat with microfiltration membrane or ultra-filtration membrane to described reaction after bio-chemical effluent filter.
6. equipment as claimed in claim 5, is characterized in that, described microfiltration membrane or ultra-filtration membrane comprise eptfe membrane.
7. equipment as claimed in claim 1, is characterized in that, described equipment for separating liquid from solid comprises settling process tripping device or By Bubble-floating Method tripping device.
8. equipment as claimed in claim 1, it is characterized in that, also comprise the treatment of mud device that is connected to described reactive tank and described equipment for separating liquid from solid, described treatment of mud device carries out processed to the mud of discharging from described equipment for separating liquid from solid, and the pressing filtering liquid that dehydration is obtained is transmitted back to described reactive tank.
9. equipment as claimed in claim 8, is characterized in that, described treatment of mud device comprises:
Slurry collecting groove, described slurry collecting groove is collected the mud from described equipment for separating liquid from solid;
Slurry thickening device, mud is pumped to described slurry thickening device from described slurry collecting groove and carries out thickening; And
Pressure filter, the mud after thickening is pumped to described pressure filter and carries out press filtration, and the described pressing filtering liquid obtaining is transferred back described reactive tank.
10. equipment as claimed in claim 1, is characterized in that, also comprises:
Be connected to the degassing vessel of described equipment for separating liquid from solid, described degassing vessel receives clear liquid from described equipment for separating liquid from solid; And
Be connected to hydrochloric acid pharmacy slot and the hydrochloric acid volume pump of described degassing vessel, described hydrochloric acid volume pump mixes to regulate the pH value of clear liquid to neutral slant acidity from described hydrochloric acid pharmacy slot pumping hydrochloric acid with clear liquid, and the carbon dioxide of generation is removed in degassing vessel.
11. 1 kinds of systems for the treatment of percolate, comprising:
Biochemical processing device, described biochemical treatment apparatus is for processing to produce bio-chemical effluent to described percolate;
As described in any one in claim 1-10 for the treatment of as described in the equipment of bio-chemical effluent; And
Reverse osmosis equipment, for carrying out reverse-osmosis treated to described clear liquid.
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| CN201320546092.4U CN203474561U (en) | 2013-09-03 | 2013-09-03 | Treatment equipment of landfill leachate |
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| CN201320546092.4U CN203474561U (en) | 2013-09-03 | 2013-09-03 | Treatment equipment of landfill leachate |
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| CN201320546092.4U Expired - Fee Related CN203474561U (en) | 2013-09-03 | 2013-09-03 | Treatment equipment of landfill leachate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106277563A (en) * | 2016-07-25 | 2017-01-04 | 广西壮族自治区环境保护科学研究院 | Garbage percolation liquid treating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277563A (en) * | 2016-07-25 | 2017-01-04 | 广西壮族自治区环境保护科学研究院 | Garbage percolation liquid treating system |
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