CN109694146A

CN109694146A - A kind of processing method of consumer waste infiltration liquid

Info

Publication number: CN109694146A
Application number: CN201811474854.8A
Authority: CN
Inventors: 张科红; 李萍
Original assignee: Hainan Tian Meiyuan Environmental Protection Equipment Engineering Co Ltd
Current assignee: Hainan Tian Meiyuan Environmental Protection Equipment Engineering Co Ltd
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2019-04-30

Abstract

The invention belongs to leachate treatment technology fields, disclose a kind of processing method of consumer waste infiltration liquid, step A: the first oxidant being added into percolate, and stand 1-2 hours, obtain solution A；Step B: the second oxidant being added into solution A, and stands 0.5-2 hours, obtains solution B；Step C: third oxidant being added into solution B, and stands 0.5-2 hours, obtains solution C；Step D: pH value adjustment agent being added into solution C, obtains solution D；Step E: coagulant and flocculant being added into solution D, obtain solution E；Step F: solution E is filtered.By the present invention in that with different oxidants so that the processing cost of consumer waste infiltration liquid substantially reduces, while secondary pollution will not be generated during handling percolate.

Description

A kind of processing method of consumer waste infiltration liquid

Technical field

The invention belongs to leachate treatment technology fields, and in particular to a kind of processing method of consumer waste infiltration liquid.

Background technique

In garbage leachate treatment process, mainstream treatment process is microbiological treatment+film filtering both at home and abroad at present.Film The percolate generated in filter process has following characteristics: 1. diafiltration output of fluid are big；Use new diafiltration of the time within half a year Output of fluid is the 30~40% of film inflow, and diafiltration output of fluid more than half a year is 50% or so of film inflow, with film Increased using the time, this amount also will increase.2.COD higher, and the COD main component in percolate is that difficult to degrade have Machine object；Generally with the difference of region and local resident's eating habit, the COD of percolate is between 1000~3000mg/l.3. color Degree is high；The coloration of percolate is generally at 500 times or more, and NH3-N concentration is higher, and coloration is higher.4. biodegradability is poor: seeping Organic matter in filtrate is mainly composition difficult to degrade, is difficult to provide nutrient source to microorganism；5. having than stronger stink.

Currently, both at home and abroad in garbage leachate treatment process, the processing of percolate or solution substantially there are two types of: First is that percolate is passed straight back to leachate equalization basin, or leachate collection is got up, then by oxidation ditch or other is done Percolate progress simple process is reached after homogenizing effect recharge to leachate equalization basin by method.The essence of this treating method is just It is the process of percolate infinite reflux.The drawbacks of infinite reflux is brought be it will be apparent that with the time accumulation, flow back into The amount of the hardly degraded organic substance accumulation of conditioning tank is more and more, and this hardly degraded organic substance cannot provide nutrition to microorganism Source leads to the biodegradability of percolate worse and worse, to make the function of entire biological treatment system in percolate treating process It gradually decreases, until going functionalization.Second is that evaporation and concentration or activated carbon adsorption processing, the cost of this method is high, usually locates Cost is managed at 200~300 yuan/ton, if entire vapo(u)rization system has to take into account that asking for high-temp anti-corrosion using evaporation process Topic, and with the increase of use time, since the fouling of equipment causes heat transfer efficiency decline serious, processing cost is further Increase；The maximum problem that active carbon processing percolate faces is the regeneration of active carbon, so that cost is high.In addition, also Have an a kind of processing method of laboratory report: Nanjing University Li Aimin professor and the joint study of Wei Erli company, Germany with from Sub-exchange resin is the processing means of core, it was reported that treated, and discharge water meets the first grade discharging mark in GB16889-97 It is quasi-.This method is with the absorption organic matter of anti-pollution colorable resin for main processing means, from existing pollution-resistant ion exchange From the point of view of resin, the energy long period uses under conditions of hardly degraded organic substance concentration and not contaminated resin is not found It reported both at home and abroad, general common domestic and international ion exchange resin (no matter macroporous type or gel-type) is in high COD condition Lower use, operating capacity can sharply decline, and protective layer is easy to be penetrated by COD, meanwhile, it is inhaled by ion exchange resin The processing of regeneration liquid waste (usual regeneration liquid waste be treating capacity 10% or so) of the attached percolate after resin adsorption saturation is One more intractable problem, reliability in this way have it is to be tested, it is appreciated that the minimizing to percolate comes It says and is good.

The percolate qualified discharge processing that film filtering generates in landfill leachate treatment is the problem of a professional, such as Fruit can directly be arranged with the first discharge standard that percolate processing is reached or be better than in GB16889-97 by lower cost It puts, then the water yield of entire percolate treating process can be increased by 40% or so and due to seeping by having the advantage that Caused by filtrate infinite reflux the problem of entire biological treatment system function degradation.

Existing consumer waste infiltration liquid still remains following problems in processing:

1, COD higher, and the COD main component in percolate is organic matter difficult to degrade；Generally with region and locality The difference of resident's eating habit, the COD of percolate is between 1000~3000mg/l.

2, coloration is high；The coloration of percolate is generally at 500 times or more, and NH3-N concentration is higher, and coloration is higher.

3, biodegradability is poor: since infinite reflux flows back into the hardly degraded organic substance of conditioning tank with the accumulation of time The amount of accumulation is more and more, and the organic matter in percolate is mainly composition difficult to degrade, is difficult to provide nutrient source to microorganism.

4, have than stronger stink.

Summary of the invention

It is an object of that present invention to provide a kind of processing methods of consumer waste infiltration liquid, are processed into solving percolate This high problem.

In order to solve the above problems existing in the present technology, the technical scheme adopted by the invention is as follows:

A kind of processing method of consumer waste infiltration liquid, includes the following steps.

Step A: the first oxidant being added into percolate, and stands 1-2 hours, obtains solution A.

Step B: the second oxidant being added into solution A, and stands 0.5-2 hours, obtains solution B.

Step C: third oxidant being added into solution B, and stands 0.5-2 hours, obtains solution C.

Step D: pH value adjustment agent being added into solution C, obtains solution D.

Step E: coagulant and flocculant being added into solution D, obtain solution E.

Step F: solution E is filtered.

Further, the first oxidant in the step A is potassium permanganate, in step A, into every liter of percolate plus Enter 1-5mg potassium permanganate.

Further, in the step A, 2.5mg potassium permanganate is added into every liter of percolate, and stop 1.5 hours.

Further, the second oxidant in the step B is sodium hypochlorite, and in step B, 10- is being added to solution A 30ml effective percentage is the sodium hypochlorite of 5%-15%.

Further, in step B, to solution A in the sodium hypochlorite that 20ml effective percentage is added is 10%, and it is static 1 small When.

Further, the third oxidant in the step C is chlorine dioxide, and in step C, 5- is added into solution B 20ml concentration is the chlorine dioxide of 1000-3000ppm, obtains solution C.

Further, in step C, the chlorine dioxide that 10ml concentration is 2000ppm is added into solution B and standing 1 is small When.

Further, the pH value adjustment agent in the step D is sodium hydroxide solution or calcium oxide solution.

Further, in the step D, pH value adjustment agent is added into solution C, until the PH value of solution is in 10-12, Form solution D.

Further, the flocculant in the step E is the Hofmann reaction object of modified polyacrylamide, coagulant For bodied ferric sulfate.

Further, in the step E, the modification of the bodied ferric sulfate and 60mg of 800mg is added into solution D The Hofmann reaction object of polyacrylamide.

Further, coagulant described in 800mg is made into 5% aqueous solution, flocculant described in 60mg is made into 0.5% Aqueous solution, add in solution D.

Further, the step F includes: that centrifuge dehydration carries out dehydration concentration to sludge, is isolated after sludge condensation Water discharged together after reflux and filter with filter liquor, the sludge moisture content after concentration is transported to landfill yard and fills out 60% or so It buries.

Further, the flocculant in the step E is the Hofmann reaction object of modified polyacrylamide, described to change The Hofmann reaction object of the polyacrylamide of property the preparation method comprises the following steps: the Hofmann reaction object of polyacrylamide is matched 0.5% Solution, the calcium chloride or magnesium chloride for then weighing polyacrylamide weight 10% is dissolved in the flocculant prepared, and It can be used after being kept for 2 hours under the conditions of 40 DEG C.

1. the determination of the oxidant in the present invention:

Advanced oxidation is research topic more popular in current sewage treatment.Advanced oxidation generallys use more skill Art is that supercritical oxidation process, ultrasonic wave and other processing techniques are combined, and ultrasound/ozone combination, ultrasound/photochemistry combination surpass Sound/electric/magnetic field combination etc., high-voltage pulse discharge in water processing technique, photocatalysis oxidation of nano material technology and fenton examination The technologies such as agent processing.

(1) Fenton reagent, Fenton reagent has selectivity to the organic matter processing in percolate, true by testing It is fixed, it selects fenton reagent to handle percolate, there was only 10% or so to the removal rate of COD, and treatment process will be adjusted twice PH increases processing cost.

(2) photocatalysis oxidation of nano material technology is usually using middle selection dichloride in anatase type grade titanium dioxide or golden red The Nano titanium dioxide that stone and anatase titanium dioxide are mixed in a certain proportion makees oxidant, selects the ultraviolet light of wavelength 365nm to do and causes Light source；Theoretically, the reaction is without selectivity, and treatment effect is very good, but in the actual process, is it there are two problem It itself has no idea to overcome: first is that the coloration of percolate is very high, inducing the ultraviolet light intensity sharp-decay of reaction, in addition one A problem is exactly that reaction intermediate is covered on nano-material surface, the nano material " failure " made.

(3) for supercritical oxidation process, ultrasonic wave and other processing technique joint technology, ultrasound/ozone combination, ultrasound/ The current common recognition of photochemistry combination, ultrasound/electric/magnetic field combination etc., high-voltage pulse discharge in water processing technique is: these oxidations Technology only has preferable effect to the lower sewage treatment of organic concentration, and the processing cost is high, can select at In this less sensitive industry, to be solved in percolate processing there are many more problem.

Relative to above several oxidants, sodium hypochlorite and chlorine dioxide are had the advantage that

(1) two kinds of oxidants of are all the oxidants for being widely used or being recommended to use in current water process, and price is just Preferably, so that cost of water treatment is low.

(2) from sodium hypochlorite and chlorine dioxide in hydrolytic process, we can see that both oxidants are in hydrolysis When have an oxygen radical generation, oxygen radical has an extremely strong oxidisability, and that there are also chlorine radicals is raw for sodium hypochlorite hydrolytic process At.

NaClO+H2O→HClO+NaOH

HClO→HCl+[O]

There are also [Cl] to release in the process for being hydrolyzed into HCl by HClO

ClO2+H2O→HClO2+H2ClO3

HClO2 and H2ClO3, which is further hydrolyzed, to be generated HCl and has [O] releasing

No matter chlorine radical or oxygen radical, have extremely strong oxidisability, can by many contain unsaturated bond or polar bond Oxidation operation (some is directly oxidized to carbon dioxide) decompose, chlorine radical and oxygen radical are in attack unsaturated bond Or it is carried out when the lower atom of polar bond electronegativity or atomic group by the reaction mechanism mechanism of reaction of two different free radicals, and to diafiltration Some oxidation operations in liquid decompose and have complementation, sodium hypochlorite to the reaction of organic matter be occur to replace, addition and Oxygenolysis；To organic matter oxygenolysis directly occurs for chlorine dioxide, and does not have an effect to the ammonia in water, its oxidation is anti- Answer selective, it can be with the inorganic matters and phenol, chlorophenol, mercaptan, secondary amine, tertiary amine etc. such as oxide, sulfide, iron, manganese in water Organic matter reacts, and the inorganic matters and chain hydrocarbon, alkene, alkynes, alcohol, acid anhydride, ketone aromatic series etc. such as ammonium salt, ammonia in water of getting along well are organic Object reacts, and the no selectivity of sodium hypochlorite, can be with many organic matters and inorganic matter generation substitution addition oxygen in water Change reaction；To the hardly degraded organic substance in water after sodium hypochlorite chloro, it is more easier to be decomposed by Chlorine Dioxide Oxidation.

(3) two kinds of oxidants of all have very strong killing effect to mushroom, it can be ensured that the bacterium value of final discharge water exists In acceptability limit.

(4) addition of two kinds of oxidants of, can be used as the flocculation aid of subsequent coagulating sedimentation, reduce the use of flocculant Amount, during coagulating sedimentation, the price of used coagulant is generally at 50,000 yuan/ton or so, the use of sodium hypochlorite, So that the processing cost of coagulating sedimentation reduces 30%.

(5) sodium hypochlorite, can be within an hour by stink and diafiltration under the catalysed oxidn of potassium permanganate The coloration of liquid is reduced within the scope of qualification.

2. the determination of catalyst in the present invention:

The use of catalyst can be such that the speed of oxidation reaction greatly speeds up.Sodium hypochlorite and Chlorine Dioxide Oxidation divide The solution available catalyst of organic matter has potassium permanganate, manganese dioxide, bromate or bivalent cupric ion etc., in percolate processing In, the introducing of catalyst should accelerate oxidation reaction speed, again convenient for finally discharging moisture after percolate has been handled From, secondary pollution cannot be brought into, from the point of view of these catalyst, cupric salt is that a kind of comparison is difficult to isolated component, and It is obvious not as good as manganese systems and bromate effect due to effect in experiment, it can be excluded when selecting, bromate is higher than height due to price Potassium manganate or manganese dioxide, and it is no too big relative to potassium permanganate to the oxidation reaction catalysis oxidation rate in percolate Advantage, and compare be difficult to remove in subsequent processing, meanwhile, manganese dioxide adds, and can enhance subsequent coagulating sedimentation Effect especially can increase precipitation process of coagulation to the removal effect of small organic molecule, therefore sodium bromate is also given up and do not had to, most Afterwards, the catalytic action of catalyst potassium permanganate and manganese dioxide is its essence is the catalysis of manganese dioxide, and potassium permanganate is with organic matter After generating manganese dioxide after reaction, no matter reacted all significantly to potassium permanganate or to the catalysis of sodium hypochlorite and chlorine dioxide Accelerate, final product is manganese dioxide, and manganese dioxide can remove in subsequent coagulating sedimentation.It is high compared with manganese dioxide Potassium manganate is made catalyst and is had the advantage that relative to manganese dioxide

Relative to above several oxidants, potassium permanganate is had the advantage that

(1) potassium permanganate can pre-oxidize removal partial organic substances；Potassium permanganate is to phenols, condensed-nuclei aromatics, heterocyclic compound Object and chlorohydrocarbon have preferable removal effect, and manganese dioxide does not have.

(2) potassium permanganate can reduce the production quantity of chloroform and other organic chlorides；Singer PC, BorchadJH and ColthurstJM's (1950) studies have shown that the pre-oxidation of potassium permanganate so that chlorination point moves back, and energy Reduce the generation for being originated from the chloride of humic acid.This point is confirmed in percolate processing experiment.So being reached in percolate It marks in emission treatment, selection potassium permanganate is suitable as catalyst.The use of potassium permanganate can make the speed of oxidation reaction It greatly speeds up.Sodium hypochlorite and the available potassium permanganate of Chlorine Dioxide Oxidation or decomposing organic matter.

3. the determination of coagulant and flocculant in the present invention:

(1) determination of the bodied ferric sulfate (PFS) as coagulant:

The coagulating sedimentation organic matter difficult to degrade to difficult oxidation in the processing of percolate qualified discharge has good removal effect, It selects suitable coagulant and flocculant to combine, the COD of the percolate after catalytic oxidation treatment can be directly reduced to Within 100mg/l.In now widely used coagulant, it is most obvious that bodied ferric sulfate removes effect to organic matter.

In flocculant, the effect that the Hofmann reaction object of polyacrylamide removes organic matter is far superior to wide at present The flocculant of the general other types used.And the Hofmann reaction object of bodied ferric sulfate and polyacrylamide combined use pair The removing effect of organic matter is significantly larger than both with the effect of other coagulant or flocculant compatibility.It is frequently used for water process PAC (aluminium polychloride) and PFS (bodied ferric sulfate) its central atom be respectively aluminium (III) and iron (III), property is poor Not bigger, the electronic structure of mainly atom has very big difference, and aluminium (III) ion is noble gas type, and charge is high and small in size, Thus morphotropism is small, and according to hsab theory, it belongs to hard acid, generates electricity price type complex with hard ligand OH-.Iron (III) from Son also belongs to hard acid, and has identical charge with aluminium (III) ion, but it is transition metal ions, belongs to non-noble gas type, tool There is 3d5 electron configuration, thus morphotropism is strong, polarizability is significant, generates stronger mutual polarization with ligand, generates firm In conjunction with here it is bodied ferric sulfate (PFS) basic reason higher to COD removal rate than aluminium polychloride (PAC), ordinary circumstances Under, aluminium polychloride only has 20% or so to the removal rate of COD, and bodied ferric sulfate has 50~85% to the removal rate of COD. Other coagulant are such as: zinc salt, magnesium carbonate, there was only 15% or so to the removal rate of COD in percolate processing；And Bodied ferric sulfate is compared with other coagulant, it is wider to water temperature and pH adaptation range, and the wadding body of formation is closely knit, sinking speed Fastly, price is relatively cheap.

(2) determination of the Hofmann reaction object of polyacrylamide as flocculant:

Common flocculant has polyacrylamide, polydimethyl diallyl ammonium chloride class

Polyacrylamide (PAM) represents the general name of a kind of linear polymer (molecular weight is 5,000,000 or more).? China PAM is referred to as 3# flocculant, and with the U.S. seporn, magnafloc, Japanese sanfloc etc. belongs to similar product.By In there is amide groups on easily fabricated, branch, (amide groups has stronger adsorption capacity to suspended particles so showing stronger wadding Solidifying ability), so being widely used in water process.Common polyacrylamide has non-ionic, anionic, both sexes poly- Acrylamide, cationic polyacrylamide.In addition, there are also polydimethyl diallyl ammonium chloride class flocculants and other artificial The high polymer coagulant of synthesis, both rear water process at home are not frequently used, the flocculation of polydimethyl diallyl ammonium chloride class Agent is used only in the processing of petroleum wastewater.

Selecting will select with the flocculant of bodied ferric sulfate compatibility according to the electrical of colloid in percolate, in percolate Colloid is negatively charged, so, anionic and it is non-ionic percolate processing in can exclude.Compare both sexes polyacrylamide Amine, cationic polyacrylamide to the removal rate of COD, amphiprotic polyacrylamide to the removal rate of COD between 30~50%, And cationic polyacrylamide to the removal rate of COD between 50~85%, so we select cationic polyacrylamide to do Flocculant, and be modified in actual use according to local water quality, specific modified method is shown in concrete operations.

The degradation reaction product of cationic polyacrylamide i.e. polyacrylamide, is commonly called as the Hough of polyacrylamide Graceful reactant.In percolate processing, the influence factor of coagulating sedimentation mainly has pH, and the pH range that bodied ferric sulfate uses is very Extensively, generally 4~11, optimum value is 6~9.Part inorganic salts picture ferrous iron, ammonium ion etc. have negative effect to coagulating sedimentation, and Calcium ion and manganese dioxide can make entire precipitation process of coagulation significantly improve the removal rate of COD.Manganese dioxide does not need and outer It is added, can react and obtain after potassium permanganate is added as catalytic oxidant, the introducing of calcium ion can be poly- by cation The calcium chloride modification of acrylamide obtains.

By determination, potassium permanganate is selected to make oxidation potassium permanganate, sodium hypochlorite and chlorine dioxide make Cooperative oxidant, Precipitation process of coagulation selects bodied ferric sulfate and modified cation polyacrylamide compatibility.

The invention has the benefit that

1, by the present invention in that with different oxidants, so that the processing cost of consumer waste infiltration liquid substantially reduces, simultaneously Secondary pollution will not be generated during handling percolate.

2, by the present invention in that with different oxidants, the processing to consumer waste infiltration liquid is reached The standard of GB16889-97.

3, the present invention is the oxidant for being widely used or being recommended to use in current water process using two kinds of oxidants, and And it is cheap, so that cost of water treatment is low, the processing cost of percolate per ton is reduced to 35 yuan, selects well below current Percolate evaporation process cost.

4, in the present invention, sodium hypochlorite and chlorine dioxide are in hydrolytic process, we can see that both oxidants are in water There is oxygen radical generation when solution, oxygen radical has extremely strong oxidisability, and there are also chlorine radicals for sodium hypochlorite hydrolytic process It generates.

5, two kinds of oxidants all have very strong killing effect to mushroom in the present invention, it can be ensured that final to discharge the thin of water Bacterium value is in acceptability limit.

6, the present invention in two kinds of oxidants addition, can be used as the flocculation aid of subsequent coagulating sedimentation, reduce flocculant Usage amount, during coagulating sedimentation, the price of used coagulant generally at 50,000 yuan/ton or so, sodium hypochlorite It uses, so that the processing cost of coagulating sedimentation reduces 30%.

7, sodium hypochlorite, can be within an hour by stink under the catalysed oxidn of potassium permanganate in the present invention It is reduced within the scope of qualification with the coloration of percolate.

8, the present invention is pre-oxidized using potassium permanganate, and potassium permanganate can pre-oxidize removal partial organic substances；Permanganic acid Potassium has preferable removal effect to phenols, condensed-nuclei aromatics, heterocyclic compound and chlorohydrocarbon.

9, the potassium permanganate in the present invention can reduce the production quantity of chloroform and other organic chlorides； SingerPC, BorchadJH and ColthurstJM's (1950) studies have shown that the pre-oxidation of potassium permanganate so that chlorination point moves back, and energy Reduce the generation for being originated from the chloride of humic acid.

10, bodied ferric sulfate is compared with other coagulant in the present invention, it is wider to water temperature and pH adaptation range, is formed Wadding body it is closely knit, sinking speed is fast, and price is relatively cheap.

Specific embodiment

In the description of the present invention, it should be noted that not specified degree is according to quality point in the present invention Number calculates.

Detailed description of the preferred embodiments below.It should be understood that described herein specific Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.

Embodiment 1:

Step F: solution E is filtered.

By the present invention in that with different oxidants, so that the processing cost of consumer waste infiltration liquid substantially reduces, while Secondary pollution will not be generated during processing percolate.

Embodiment 2:

Step F: solution E is filtered.

The first oxidant in the step A is potassium permanganate, and in step A, 2.5mg high is added into every liter of percolate Potassium manganate, and stop 1.5 hours.

The second oxidant in the step B is sodium hypochlorite, in step B, is 20ml effective percentage is added to solution A 10% sodium hypochlorite, and static 1 hour.

Third oxidant in the step C is chlorine dioxide, and in step C, 10ml concentration, which is added, into solution B is The chlorine dioxide of 2000ppm simultaneously stands 1 hour.

PH value adjustment agent in the step D is sodium hydroxide solution or calcium oxide solution.

In the step D, pH value adjustment agent is added into solution C, until the pH value of solution is in 10-12, formation solution D.

In the step E, the polyacrylamide of the modification of the bodied ferric sulfate and 60mg of 800mg is added into solution D Hofmann reaction object.

The step F includes: that centrifuge dehydration carries out dehydration concentration to sludge, and the water isolated after sludge condensation passes through back It is discharged together after flowing through filter with filter liquor, the sludge moisture content after concentration is transported to landfill yard landfill 60% or so.

By the present invention in that enabling the processing to consumer waste infiltration liquid to reach GB16889- with different oxidants 97 standard.

Embodiment 3:

A kind of processing method of consumer waste infiltration liquid, comprising the following steps:

Step F: solution E is filtered.

The first oxidant in the step A is potassium permanganate, and in step A, 1-5mg high is added into every liter of percolate Potassium manganate, and static 1.5 hours.

The optimal pH of potassium permanganate oxidation organic matter is in neutrality left and right, although potassium permanganate aoxidizes in acid condition Property is most strong.The pH for the percolate that general film filtering generates does not have to adjustment pH between 6~9 before potassium permanganate is added, The determination of the dosage and optimum reacting time of potassium permanganate is limited by following factor: generation and processing row due to percolate Put be a dynamic equilibrium process, it is small preferably not more than 1.5 that entire treatment process requires catalysis oxidation to obtain the residence time When；Meanwhile the dosage of potassium permanganate is contemplated that cannot have through oxidation, coagulating sedimentation and filtered final discharge water The aubergine or pink generated due to adding potassium permanganate, that is, to consider the potassium permanganate in entire treatment process Adding should not be excessive.

Following table is influence of the potassium permanganate dosage within 1.5 hours residence times to percolate COD and to final row The Color influences to discharge water.Acquired film filtering percolate is the nanofiltration percolate in Zhengzhou City's landfill leachate treatment workshop, COD=2600mg/l, coloration are 600 times, NH3-N=25mg/l, BOD5=35mg/l.

(color of the final discharge water in upper table be after Potassium Permanganate Preoxidation is handled, using sodium hypochlorite and Chlorine dioxide synergistic oxidation+coagulating sedimentation+filtered final discharge water, after the processing of above-mentioned various concentration potassium permanganate, NH₃- N can stablize substantially in 5~10mg/l, BOD₅Substantially 15mg/l can be stabilized to.)

As can be seen from the above table as the dosage of potassium permanganate increases, water sample is obtained after the pre- catalysis oxidation of potassium permanganate COD decline it is very fast, but after dosage is more than 3.0mg/l, the COD range of decrease eases up, and illustrates easily to be urged by potassium permanganate in percolate The organic concentration for changing oxygenolysis gradually decreases, we place the sample that potassium permanganate dosage is 3.0mg/l 24 hours The COD detected afterwards is 2196mg/l, illustrates easily to have been tended to by the reaction of potassium permanganate catalysis oxidation decomposing organic matter in percolate Entirely.The coloration of sample and the coloration of final discharge water, the dosage of potassium permanganate should select 2.5mg/l or so after integrated treatment Be it is proper, reaction front and back pH be basically unchanged.

According to the mechanism of action of sodium hypochlorite and chlorine dioxide to organic matter is different and Organic Pollutants of Landfill Leachate ingredient with And the influence of other inorganic salts, sodium hypochlorite reacted with Organic Pollutants of Landfill Leachate chlorine dioxide is added afterwards to a certain extent can be with Guarantee that the coloration being discharged after sodium hypochlorite and chlorine dioxide synergistic oxidation does not have substantially, COD can be within the regular hour It is preferably minimized value, anti-that experiment i.e. chlorine dioxide is selected to be added before sodium hypochlorite, both colorations of water outlet can be diafiltration Liquid processing to colourless, but the COD of key player on a team's experiment will well below anti-choosing experiment, so, the sequence of synergistic oxidation is sodium hypochlorite It to be added before chlorine dioxide addition, and guarantee that sodium hypochlorite can have certain reaction time.In landfill leachate treatment work In skill, film filters the temperature of percolate water outlet generally at 25 DEG C or so, and at this temperature, sodium hypochlorite was in 1 hour or so energy Reach 90% with the organic matter reaction that can be reacted in percolate, under this water temperature, chlorine dioxide is in percolate The time that the organic matter effect that can selectively react completes 90% or more is also required to 1 hour or so.So synergistic oxidation In two kinds of reagents add the time and sequence is: be added the reactions such as a certain amount of sodium hypochlorite added after 1 hour again it is suitable The chlorine dioxide of amount is transferred to the coagulating sedimentation stage after chlorine dioxide is added 1 hour.

We can determine the optimal addn of sodium hypochlorite and chlorine dioxide according to experiment.Here is by permanganic acid The effect after not same amount sodium hypochlorite is added after potassium is processed.Sodium hypochlorite used is commercially available available chlorine content 10% or so Technical grade product, percolate used be Potassium Permanganate Preoxidation after COD=2200mg/l, NH3-N=8mg/l, BOD5= The water sample of 15mg/l.

As seen from the above table, after sodium hypochlorite additional amount is greater than 10ml, BOD5 is basically stable within 20mg/l.

By experiment, the additional amount of sodium hypochlorite should be proper between 20~25ml in 1L percolate, when secondary chlorine After the additional amount of sour sodium is more than 25ml, coloration can rise, and the coloration of rising is contributed by excessive sodium hypochlorite to be generated.Work as diafiltration When the digestive system of liquid biological treatment part is abnormal, the NH3-N of percolate can rise, the amount of addition sodium hypochlorite at this time Raising by a relatively large margin is had, sodium hypochlorite can release NH3-N preferential oxidation at nitrogen.Determine the addition of sodium hypochlorite After amount, by orthogonal experiment, determine that the additional amount of chlorine dioxide in 6ml or so is optimum value, chlorine dioxide used is commercially available Solid chlorine dioxide, having chlorine dioxide concentration after dissolution is that the COD of 2000ppm. percolate at this time can stablize on the left side 280mg/l The right side, coloration will not be significantly raised, and the pH of percolate is slightly increased after processing.

So being using the best adding manner and addition sequence of sodium hypochlorite and chlorine dioxide synergistic oxidation: high The sodium hypochlorite that 20ml effective percentage is 10% is added in the pretreated every liter of percolate of potassium manganate, reaction adds after carrying out 1 hour Enter 10ml concentration be 2000ppm chlorine dioxide, and allow chlorine dioxide be added after stop 1-1.51 hours, then carry out coagulation Precipitating.

Flocculant in the step E is the Hofmann reaction object of modified polyacrylamide, and coagulant is polyaluminum sulfate Iron.

Flocculant uses the Hofmann reaction of modified polyacrylamide, according to experiment, our Houghs in polyacrylamide It joined 10% calcium chloride or 10% magnesium chloride in graceful reactant, the using effect of the two is suitable, and calcium chloride or chlorine is added After changing magnesium, the COD after coagulating sedimentation is got well than the effect being not added, and the removal rate of COD improves 20%.Polyacrylamide is suddenly The modified specific way of the graceful reactant of husband is: the Hofmann reaction object of polyacrylamide being matched to 0.5% solution, is then claimed The calcium chloride or magnesium chloride for taking polyacrylamide weight 10% are dissolved in the flocculant prepared, and under the conditions of 40 DEG C It can be used after being kept for 2 hours.Coagulant selects bodied ferric sulfate, uses pH range according to bodied ferric sulfate, passes through coagulation The alumen ustum that the pH and coagulation process for precipitating front and back are generated determines, is tested by the alumen ustum of beaker, determines the use of bodied ferric sulfate Amount is 800mg/l, and the Hofmann reaction object dosage of corresponding modified polyacrylamide is 60mg/l.The coagulation of quantitative compatibility The pH range of agent and flocculant used can be determined by experiment, and it is demonstrated experimentally that within the scope of than better suited pH, Coagulating sedimentation has higher removal rate to COD.

Following table is that the percolate coagulation after Potassium Permanganate Preoxidation and sodium hypochlorite and chlorine dioxide synergistic oxidation is heavy (water for carrying out coagulating sedimentation is by potassium permanganate and sodium hypochlorite and two for pH variation before and after forming sediment and the COD variation after coagulation The percolate of the catalytic oxidation treatment of chlorine monoxid, COD 330mg/l, coloration are 10 times).

Coloration, which rises, after coagulating sedimentation is formed due to the increase of iron ion in solution in acid condition.From experiment It sees, is transferred to 11 or so in pH, the COD after coagulating sedimentation can be reduced to relatively low level.Namely in the coagulating sedimentation stage, PH is transferred to 11 or so with sodium hydroxide or calcium oxide, the bodied ferric sulfate of 800mg or so is added for every liter of percolate and 60mg changes Property polyacrylamide Hofmann reaction object, guarantee that percolate COD after catalytic oxidation treatment is reduced to and meet First discharge standard in GB16889-97.In practical application technique, 3 times to 5 times of sludge backflow is selected, it can be by coagulation The usage amount of agent and flocculant controls the half or so in existing usage amount.

Flocculant in the step E is the Hofmann reaction object of modified polyacrylamide, the polypropylene of the modification The Hofmann reaction object of amide the preparation method comprises the following steps: the Hofmann reaction object of polyacrylamide to be matched to 0.5% solution, so The calcium chloride or magnesium chloride for weighing polyacrylamide weight 10% afterwards are dissolved in the flocculant prepared, and in 40 DEG C of items It can be used after being kept for 2 hours under part.

The invention working principle carries out the mixing of percolate and drug in pipe-line mixer, can make highest degree of scatter ≤ 10um, liquid~liquid phase unevenness coefficient X≤8%, mixing benefit up to 90%~95%, place into chemical reaction water tank into Row reaction, has selected chemical reaction water tank to have very high adaptability to different quality, and anti-shock loading is higher, every liter of diafiltration 2.5mg potassium permanganate is added in liquid, stops 1.5 hours, obtains solution A, adds catalyst, reaction rate can be greatly improved, Dosage is reduced, effluent quality is improved；The sodium hypochlorite that 20ml effective percentage is 10% is added later, stops 1 hour, obtains molten Liquid B is subsequently added into the chlorine dioxide 10ml for being 2000ppm with concentration, after chlorine dioxide is added 1 hour, obtains solution C, will be molten 1% sodium hydroxide of the pH of liquid C or 1% calcium oxide solution are adjusted to 11 or so, then solution C is put into and uses mechanical stirring Accelerating purifying pool carries out coagulating sedimentation, and coagulant uses bodied ferric sulfate, and flocculant uses the Hough of modified polyacrylamide Graceful reactant, the additional amount of coagulant are 800mg, are generally made into 5% aqueous solution, and flocculant addition is 60mg or so, one It is well matched at 0.5% aqueous solution, solution is filtered with the percolate after coagulating sedimentation and is separated, filter liquor and sludge are dense The body refuse isolated after contracting has 3~5 times to flow back, and is filtered by the body refuse auxiliary of reflux, to reduce coagulant With the additional amount of flocculant, water discharges after reflux and filter with filter liquor together, and the sludge moisture content after concentration is on 60% left side The right side, so the discharge rate of body refuse is usually very low, the water that entire deslagging is taken away accounts for 4% for the treatment of capacity or so, is dehydrated by body refuse Recycling, the water that deslagging is taken away, which can be reduced to, accounts for the 2% of processing water, and the rate of recovery of entire treatment process water can reach 98% Left and right.

The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention The product of kind form, however, make any variation in its shape or structure, it is all to fall into the claims in the present invention confining spectrum Interior technical solution, is within the scope of the present invention.

Claims

1. a kind of processing method of consumer waste infiltration liquid, it is characterised in that: the following steps are included:

Step A: the first oxidant being added into percolate, and stands 1-2 hours, obtains solution A；

Step B: the second oxidant being added into solution A, and stands 0.5-2 hours, obtains solution B；

Step C: third oxidant being added into solution B, and stands 0.5-2 hours, obtains solution C；

Step D: pH value adjustment agent being added into solution C, obtains solution D；

Step E: coagulant and flocculant being added into solution D, obtain solution E；

Step F: solution E is filtered.

2. a kind of processing method of consumer waste infiltration liquid according to claim 1, it is characterised in that: in the step A The first oxidant be potassium permanganate, in step A, 1-5mg potassium permanganate is added into every liter of percolate.

3. a kind of processing method of consumer waste infiltration liquid according to claim 1, it is characterised in that: in the step B The second oxidant be sodium hypochlorite, in step B, the hypochlorous acid that 10-30ml effective percentage is 5%-15% is being added to solution A Sodium.

4. a kind of processing method of consumer waste infiltration liquid according to claim 1, it is characterised in that: in the step C Third oxidant be chlorine dioxide, in step C, the titanium dioxide that 5-20ml concentration is 1000-3000ppm is added into solution B Chlorine obtains solution C.

5. a kind of processing method of consumer waste infiltration liquid according to claim 1, it is characterised in that: in the step D PH value adjustment agent be sodium hydroxide solution or calcium oxide solution.

6. a kind of processing method of consumer waste infiltration liquid according to claim 4, it is characterised in that: in the step D, PH value adjustment agent is added into solution C, until the pH value of solution is in 10-12, formation solution D.

7. a kind of processing method of consumer waste infiltration liquid according to claim 1, it is characterised in that: in the step E Flocculant be polyacrylamide Hofmann reaction object, coagulant is bodied ferric sulfate.

8. a kind of processing method of consumer waste infiltration liquid according to claim 7, it is characterised in that: the polyacrylamide The Hofmann reaction object of amine is the product that polyacrylamide obtains after Hofmann reaction.

9. a kind of processing method of consumer waste infiltration liquid according to claim 8, it is characterised in that: in the step E Flocculant be modified polyacrylamide Hofmann reaction object, the Hofmann reaction object of the polyacrylamide of the modification The preparation method comprises the following steps: the Hofmann reaction object of polyacrylamide to be matched to 0.5% solution, polyacrylamide weight is then weighed 10% calcium chloride or magnesium chloride is dissolved in the flocculant prepared, and can be made after being kept for 2 hours under the conditions of 40 DEG C With.