CN109320017A - A kind of processing method of landfill leachate - Google Patents

A kind of processing method of landfill leachate Download PDF

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Publication number
CN109320017A
CN109320017A CN201811304907.1A CN201811304907A CN109320017A CN 109320017 A CN109320017 A CN 109320017A CN 201811304907 A CN201811304907 A CN 201811304907A CN 109320017 A CN109320017 A CN 109320017A
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landfill leachate
flocculant
processing method
pond
parts
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CN109320017B (en
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孙静亚
麻跃
阳广凤
张富生
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Zhejiang Ocean University ZJOU
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Zhejiang Ocean University ZJOU
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1263—Sequencing batch reactors [SBR]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes

Abstract

The present invention relates to a kind of processing methods of landfill leachate to use inorganic flocculating agent and organic flocculant, inorganic flocculating agent is the composite inorganic flocculant formed based on atlapulgite, with the flocculant for reducing the water process of ammonia nitrogen in water, denitrogenation and suspended matter can be made to precipitate；Organic flocculant is the compound organic flocculant formed based on polyacrylamide, anionic polyacrylamide forms insoluble sediment in conjunction with heavy metal ion, chitosan is a kind of anionic polymer flocculant in formula, has charge neutrality effect, adsorption bridging effect and metal-chelating effect.Chitosan is compound with active carbon, forms chemistry between anionic chitosan and porous active carbon and builds bridge, neutralizes and reduce the charge of colloid surface, facilitate elimination of colloid stability；This formula has the function of reducing heavy metal ion and other pollutants in water.The present invention can carry out stablizing processing, qualified discharge to the landfill leachate of complex in composition, capricious refuse landfill.

Description

A kind of processing method of landfill leachate
Technical field
The present invention relates to waste disposal method more particularly to a kind of processing methods of landfill leachate.
Background technique
Landfill leachate refers to the moisture that rubbish itself contains in refuse landfill, the sleet water into landfill yard And other moisture, the saturation moisture capacity of rubbish, overburden layer is deducted, and undergo waste layer and overburden layer and a kind of high concentration for being formed Waste water.Landfill leachate has the characteristics that be different from general municipal sewage: pollutant concentration is high, some landfill percolates COD, ammonia nitrogen concentration can be up to nearly 100,000, nearly ten thousand mg/L respectively.There are three the most prominent features of percolate: first is that ammonia nitrogen concentration Height has inhibiting effect to the breeding and growth of microorganism；Second is that the concentration of phosphorus is low；Third is that water quality is in aperiodicity change, and become Change amplitude is big, is difficult to adapt to wastewater treatment equipment.It is the simplest method by landfill leachate and municipal sewage merging treatment, But landfill yard is typically remote from cities and towns, therefore its percolate and municipal sewage merging treatment have certain specific difficulty, often not It obtains and oneself does not handle individually.The processing of city refuse landfill landfill leachate is always in Landfill Site Design, operation and management Very stubborn problem.Landfill leachate is product of the liquid in landfill yard gravity flowing, is mainly derived from precipitation and rubbish sheet Body it is interior aqueous.Since liquid may influence in many of flow process factor the property of percolate, including physical factor, Chemical factor and biological factor etc., so the property of percolate changes in a sizable range.In general, pH Value between 4~9, COD in the range of 4000~100000mg/L, BOD5 from 200~10000mg/L, heavy metal concentration and The concentration of heavy metal is almost the same in municipal wastewater.City refuse landfill landfill leachate is a kind of high concentration of complicated component If organic wastewater is directly discharged into environment untreated, will cause serious environmental pollution.For the purpose of protecting environment, to infiltration It is essential that filtrate, which carries out processing,.
Existing method for treating garbage percolation liquid is broadly divided into bioanalysis, physico-chemical process and land law three categories.Biological treatment Anaerobic Treatment has up-flow anaerobic sludge blanket UASB, anaerobic baffled reactor ABR, anaerobic pond, EGSB, IC etc. in method；It is aerobic Processing has the aerobic aeration pool, activated sludge process, biological rotating disk and trickling filter etc., anaerobic/aerobic (A/O) mixed processing.Physico-chemical process Mainly there are chemical coagulation and precipitation, activated carbon adsorption, chemical oxidation, catalysis oxidation, film process etc..Land treatment systems such as artificial swamp etc. Mainly by the filtering of soil particle, ion-exchange absorption echos precipitating etc..The high-concentration ammonia nitrogenous wastewater of landfill leachate, discharge amount Greatly, complicated component, strong toxicity is big to environmental hazard, and processing difficulty is again very big, so that the pollution and its improvement of ammonia nitrogen waste water are always Great attention by whole world environment protection field.The extremely strong landfill leachate of the pollution generated during garbage loading embeading is easily Lower infiltration polluted underground water, karst landform especially special with Southwestern China area, Groundwater ecological environment frailty, local resident Drinking water source is mostly underground water, if significant damage can be brought to ecological environment and human health by dealing with improperly, therefore rubbish seeps One of the difficult point for very urgently having become current home and abroad environment engineering field is effectively treated in filtrate.Country props up energetically in recent years Environmental protection industry is held, resident increases accordingly environmental requirement with the improvement of people ' s living standards, and Design of Waste Landfill Site scheme must It must optimize, create and the landfill yard of reorganization and expansion will execute discharge standard with GB16889-2008.
Recent years, a kind of new CANON technique (Completely autotrophic ammoni-um removal Over nitrite, autotrophic denitrification technique in biomembrane) it is used for the processing of percolate from garbage filling field, obtain processing effect well Fruit.CANON technique is a kind of Process of Biological Nitrogen Removal, which refers to passes through control in single reactor or biomembrane Dissolved oxygen realizes nitrosation and Anammox, to achieve the purpose that denitrogenation.Under micro-oxygen conditions, Nitrosomas is by ammonia nitrogen portion Divide and is oxidized to nitrous acid, anaerobic environment needed for ANAMMOX process is created in consumption oxidation；The nitrous acid of generation and some residual Ammonia nitrogen occurs ANAMMOX reaction and generates nitrogen, and the stoichiometric equation of CANON process is as follows: nitrosation: 1NH+1.5O2 → 1NO+H+H2O
ANAMMOX:1NH3+1.32NO+H → 1.02N2+0.26NO+2H2O
CANON:1NH+0.85O2 → 0.435N2+0.13NO+0.14H+1.3H2O
From reaction formation, CANON technique is the combination of SHARON technique and ANAMMOX technique.The control of CANON technical process System, be first reach dynamic equilibrium between aerobic ammonia oxidation and Anammox to be realized, and anaerobic ammonia oxidizing bacteria growth rate it is slow, Doubling time is long, once growing environment is destroyed, it is necessary to and long time could restore；DO and ASL is two masters simultaneously The control parameter wanted, for the stability for keeping sludge, it should avoid the excessive concentration of O2 and NO2-N, this can be by controlling oxygen Change reduction potential and DO concentration to realize.CANON technique due to being not necessarily to additional organic carbon source substance in the process of running, to have Effect is overcome traditional nitrification-denitrification process requirement and is supported denitrifying problem using organic matter as electron donor, can be saved 100% carbon source is particularly suitable for handling the high-concentration ammonia nitrogenous wastewater of low C/N；Since the technique is using restricted oxygen supply Mode, DO concentration is lower in reactor, can save 60% aeration consumption；The technique can complete NH-N extremely in a reactor N2's is totally converted process, so that the process of biological removal of nitrogen is very brief, corresponding construction, operation, administration fee are also expected to greatly Width reduces.
But since refuse landfill landfill leachate is complex in composition, CANON technical face is to capricious, high ammonia nitrogen Landfill leachate, or not therefore design requirement is often not achieved in treatment effect to the stability of processing.
Summary of the invention
It is an object of the invention to complex in composition, the CANON technical faces in order to solve conventional garbage Landfill Leachate To capricious, high ammonia nitrogen landfill leachate, or not therefore design requirement is often not achieved in treatment effect to the stability of processing Defect and provide it is a kind of the landfill leachate of complex in composition, capricious refuse landfill can be carried out stablizing processing, reach Mark the processing method of the landfill leachate of discharge.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of processing method of landfill leachate, the treating method comprises following steps:
Step 1: landfill leachate treatment material, and and stone is made in cinder, flyash and chitin mixture modified Ash is poured into together in landfill leachate neutralization pond；
Step 2: will treated that landfill leachate send carries out deamination reaction to Ammonia blowing-out tower through step 1；
Step 3: anaerobic pond will be imported through step 2 treated landfill leachate；
Step 4: will import SBR runoff investigation pond through step 3 treated landfill leachate, with being pumped to sbr reactor in parallel Biological respinse is carried out in pond；
Step 5: will import coagulating basin through step 4 treated landfill leachate, addition composite inorganic flocculant and be compounded with The reaction of machine flocculant；The sludge that coagulating basin generates burns after concentrating.
Preferably, the mass ratio of cinder, flyash and chitin modified is 3-5: 2-3: 1；Landfill leachate The mass ratio for handling material and lime is 3: 1.
Preferably, composite inorganic flocculant described in step 5, additive amount 1-5wt%, consisting of atlapulgite: pottery Grain: waste slag of electrolytic aluminium: the composition of ferric trichloride, atlapulgite: haydite: waste slag of electrolytic aluminium: the mass ratio of ferric trichloride is 5: 3 ∶1∶1.3。
Preferably, step 5 adds the compound organic flocculant formed based on polyacrylamide in coagulating basin, add Dosage 2-3wt%, formula are as follows: anion-polyacrylamide 40wt%-70wt%, Powdered Activated Carbon 25wt%-55wt%, Chitosan 1wt%-5wt%.
Preferably, the operation program in the parallel connection sbr reactor pond are as follows: water inlet 45~50min → 9~12h of aeration → heavy Shallow lake 60min → draining 60min, spoil disposal after drained water, each spoil disposal are the 1/10 of total inflow, and sludge age is 20~30d, are transported daily 2~3 periods of row.
Preferably, the modified chitin uses following technique to prepare: by 20-35 parts of deacetylations for 35-45%'s Chitin is added the sodium hydroxide solution that 100-140 parts of concentration are 2.5-3.5mol/L and impregnates 1-3 days, filters, washing, is added double The bleaching of oxygen water, is filtered, and is washed, dry, and 1-3 parts of epoxy bromopropanes, 0.05-0.09 parts of maleic anhydrides, 0.5-0.9 parts of front threes are added Amine aqueous solution, 0.001-0.003 part azodiisobutyronitrile and 0.01-0.05 parts of tetrabutylammonium bromide stirred under pressure, mixing speed For 400-700r/min, whipping temp is 150-170 DEG C, mixing time 15-35min, and spray drying obtains modified crust Element.
Preferably, the anaerobic pond uses common anaerobic nitrification, 35 DEG C, load is 1kgCOD/ (m3D), it stops Time 10d.
Compared with prior art the beneficial effects of the present invention are: due to above-mentioned technical proposal of the invention, use inorganic Flocculant and organic flocculant, inorganic flocculating agent are the composite inorganic flocculants formed based on atlapulgite, and having reduces water The flocculant of the water process of middle ammonia nitrogen denitrogenation and can be such that suspended matter precipitates；Organic flocculant is based on polyacrylamide The compound organic flocculant of composition, anionic polyacrylamide form insoluble sediment in conjunction with heavy metal ion, are formulated Middle chitosan is a kind of anionic polymer flocculant, has charge neutrality effect, adsorption bridging effect and metal-chelating effect.Shell Glycan is compound with active carbon, forms chemistry between anionic chitosan and porous active carbon and builds bridge, neutralizes and reduce colloid The charge on surface, facilitates elimination of colloid stability；This formula has the function of reducing heavy metal ion and other pollutants in water.This hair It is bright that the landfill leachate of complex in composition, capricious refuse landfill can be carried out stablizing processing, qualified discharge.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further explained:
Embodiment 1
A kind of processing method of landfill leachate, the treating method comprises following steps:
Step 1: landfill leachate treatment material, and and stone is made in cinder, flyash and chitin mixture modified Ash is poured into together in landfill leachate neutralization pond；The mass ratio of cinder, flyash and chitin modified is 3: 2: 1；Rubbish It is 3: 1 that rubbish percolate, which handles material and the mass ratio of lime,；The modified chitin is prepared using following technique: by 20 parts of de- second The chitin that acyl degree is 35% is added the sodium hydroxide solution that 100 parts of concentration are 2.5mol/L and impregnates 1 day, filters, washs, is added Hydrogen peroxide bleaching filters, and washs, dry, be added 1 part of epoxy bromopropane, 0.05 part of maleic anhydride, 0.5 part of trimethylamine aqueous solution, 0.001 part of azodiisobutyronitrile and 0.01 part of tetrabutylammonium bromide stirred under pressure, mixing speed 400r/min, whipping temp are 150 DEG C, mixing time 15min, spray drying obtains modified chitin；
Step 2: will treated that landfill leachate send carries out deamination reaction to Ammonia blowing-out tower through step 1；
Step 3: anaerobic pond will be imported through step 2 treated landfill leachate；Anaerobic pond use common anaerobic nitrification, 35 DEG C, load is 1kgCOD/ (m3D), residence time 10d；
Step 4: will import SBR runoff investigation pond through step 3 treated landfill leachate, with being pumped to sbr reactor in parallel Biological respinse is carried out in pond；The operation program in sbr reactor pond in parallel are as follows: water inlet 45min → aeration 9h → precipitating 60min → draining 60min, spoil disposal after drained water, each spoil disposal are 1/10, sludge age 20d of total inflow, run 2 periods daily；
Step 5: will import coagulating basin through step 4 treated landfill leachate, addition composite inorganic flocculant and be compounded with The reaction of machine flocculant；The sludge that coagulating basin generates burns after concentrating；The composite inorganic flocculant, additive amount 1wt%, composition For atlapulgite: haydite: waste slag of electrolytic aluminium: the composition of ferric trichloride, atlapulgite: haydite: waste slag of electrolytic aluminium: ferric trichloride Mass ratio be 5: 3: 1: 1.3；Compound organic flocculant, additive amount 2wt%, formula are as follows: anion-polyacrylamide 40wt%, Powdered Activated Carbon 55wt%, chitosan 5wt%.
Embodiment 2
A kind of processing method of landfill leachate, the treating method comprises following steps:
Step 1: landfill leachate treatment material, and and stone is made in cinder, flyash and chitin mixture modified Ash is poured into together in landfill leachate neutralization pond；The mass ratio of cinder, flyash and chitin modified is 4: 3: 1；Rubbish It is 3: 1 that rubbish percolate, which handles material and the mass ratio of lime,；The modified chitin is prepared using following technique: by 23 parts of de- second The chitin that acyl degree is 38% is added the sodium hydroxide solution that 125 parts of concentration are 2.8mol/L and impregnates 2 days, filters, washs, is added Hydrogen peroxide bleaching filters, and washs, dry, be added 2 parts of epoxy bromopropanes, 0.6 part of maleic anhydride, 0.8 part of trimethylamine aqueous solution, 0.002 part of azodiisobutyronitrile and 0.04 part of tetrabutylammonium bromide stirred under pressure, mixing speed 500r/min, whipping temp are 168 DEG C, mixing time 24min, spray drying obtains modified chitin；
Step 2: will treated that landfill leachate send carries out deamination reaction to Ammonia blowing-out tower through step 1；
Step 3: anaerobic pond will be imported through step 2 treated landfill leachate；Anaerobic pond use common anaerobic nitrification, 35 DEG C, load is 1kgCOD/ (m3D), residence time 10d；
Step 4: will import SBR runoff investigation pond through step 3 treated landfill leachate, with being pumped to sbr reactor in parallel Biological respinse is carried out in pond；The operation program in sbr reactor pond in parallel are as follows: water inlet 48min → aeration 11h → precipitating 60min → row Water 60min, spoil disposal after drained water, each spoil disposal are 1/10, sludge age 25d of total inflow, run 3 periods daily；
Step 5: will import coagulating basin through step 4 treated landfill leachate, addition composite inorganic flocculant and be compounded with The reaction of machine flocculant；The sludge that coagulating basin generates burns after concentrating；The composite inorganic flocculant, additive amount 3wt%, composition For atlapulgite: haydite: waste slag of electrolytic aluminium: the composition of ferric trichloride, atlapulgite: haydite: waste slag of electrolytic aluminium: ferric trichloride Mass ratio be 5: 3: 1: 1.3；Compound organic flocculant, additive amount 2.5wt%, formula are as follows: anion-polyacrylamide 70wt%, Powdered Activated Carbon 25wt%, chitosan 5wt%.
Embodiment 3
A kind of processing method of landfill leachate, the treating method comprises following steps:
Step 1: landfill leachate treatment material, and and stone is made in cinder, flyash and chitin mixture modified Ash is poured into together in landfill leachate neutralization pond；The mass ratio of cinder, flyash and chitin modified is 5: 3: 1；Rubbish It is 3: 1 that rubbish percolate, which handles material and the mass ratio of lime,；The modified chitin is prepared using following technique: by 35 parts of de- second The chitin that acyl degree is 45% is added the sodium hydroxide solution that 140 parts of concentration are 3.5mol/L and impregnates 3 days, filters, washs, is added Hydrogen peroxide bleaching filters, and washs, dry, be added 3 parts of epoxy bromopropanes, 0.09 part of maleic anhydride, 0.9 part of trimethylamine aqueous solution, 0.003 part of azodiisobutyronitrile and 0.05 part of tetrabutylammonium bromide stirred under pressure, mixing speed 700r/min, whipping temp are 170 DEG C, mixing time 35min, spray drying obtains modified chitin；
Step 2: will treated that landfill leachate send carries out deamination reaction to Ammonia blowing-out tower through step 1；
Step 3: anaerobic pond will be imported through step 2 treated landfill leachate；Anaerobic pond use common anaerobic nitrification, 35 DEG C, load is 1kgCOD/ (m3D), residence time 10d；
Step 4: will import SBR runoff investigation pond through step 3 treated landfill leachate, with being pumped to sbr reactor in parallel Biological respinse is carried out in pond；The operation program in sbr reactor pond in parallel are as follows: water inlet 50min → aeration 12h → precipitating 60min → row Water 60min, spoil disposal after drained water, each spoil disposal are 1/10, sludge age 30d of total inflow, run 3 periods daily；
Step 5: will import coagulating basin through step 4 treated landfill leachate, addition composite inorganic flocculant and be compounded with The reaction of machine flocculant；The sludge that coagulating basin generates burns after concentrating；The composite inorganic flocculant, additive amount 5wt%, composition For atlapulgite: haydite: waste slag of electrolytic aluminium: the composition of ferric trichloride, atlapulgite: haydite: waste slag of electrolytic aluminium: ferric trichloride Mass ratio be 5: 3: 1: 1.3；Compound organic flocculant, additive amount 3wt%, formula are as follows: anion-polyacrylamide 60wt%, Powdered Activated Carbon 39wt%, chitosan 1wt%.
Certain refuse landfill landfill leachate 100m3, waste water composition is shown in Table 1
Table 1, waste component
COD mg/L 50000
BOD3 mg/L 3800
NH3-N mg/L 3500
SS mg/L 500
Treated that water quality detection is shown in Table 2 for method processed by the invention.
Table 2, water quality detection
Project Unit 1 water quality of embodiment 2 water quality of embodiment 3 water quality of embodiment
COD mg/L 30 28 25
BOD3 mg/L 5 4.8 4.5
NH3-N mg/L 3.1 2.9 2.8
SS mg/L 2.5 2.3 2.1
Copper mg/L It is not detected It is not detected It is not detected
Nickel mg/L It is not detected It is not detected It is not detected
Lead mg/L It is not detected It is not detected It is not detected
Cadmium mg/L It is not detected It is not detected It is not detected
Mercury mg/L It is not detected It is not detected It is not detected
Description of the invention book, which does not elaborate, partly belongs to techniques well known.
The above is only a preferred embodiment of the present invention, it is noted that come for those of ordinary skill in the art It says, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvement and modification also should be regarded as Protection scope of the present invention.

Claims (7)

1. a kind of processing method of landfill leachate, which is characterized in that the treating method comprises following steps:
Step 1: landfill leachate treatment material, and and stone is made in cinder, flyash and chitin mixture modified Ash is poured into together in landfill leachate neutralization pond；
Step 2: will treated that landfill leachate send carries out deamination reaction to Ammonia blowing-out tower through step 1；
Step 3: anaerobic pond will be imported through step 2 treated landfill leachate；
Step 4: will import SBR runoff investigation pond through step 3 treated landfill leachate, with being pumped to sbr reactor in parallel Biological respinse is carried out in pond；
Step 5: will import coagulating basin through step 4 treated landfill leachate, addition composite inorganic flocculant and be compounded with The reaction of machine flocculant；The sludge that coagulating basin generates burns after concentrating.
2. a kind of processing method of landfill leachate according to claim 1, which is characterized in that cinder, flyash and warp The mass ratio for crossing modified chitin is 3-5: 2-3: 1；The mass ratio of landfill leachate treatment material and lime is 3: 1.
3. a kind of processing method of landfill leachate according to claim 1, which is characterized in that compound described in step 5 Inorganic flocculating agent, additive amount 1-5wt%, consisting of atlapulgite: haydite: waste slag of electrolytic aluminium: the composition of ferric trichloride, it is living Property carclazyte: haydite: waste slag of electrolytic aluminium: the mass ratio of ferric trichloride be 5: 3: 1: 1.3.
4. a kind of processing method of landfill leachate according to claim 1, which is characterized in that step 5 is in coagulating basin Add the compound organic flocculant formed based on polyacrylamide, additive amount 2-3wt%, formula are as follows: anionic poly- third Acrylamide 40wt%-70wt%, Powdered Activated Carbon 25wt%-55wt%, chitosan 1wt%-5wt%.
5. a kind of processing method of landfill leachate according to claim 1, which is characterized in that the parallel connection sbr reactor The operation program in pond are as follows: 45~50min → 9~12h of aeration → precipitating 60min → draining 60min of intaking, spoil disposal after drained water, Each spoil disposal is the 1/10 of total inflow, and sludge age is 20~30d, runs 2~3 periods daily.
6. a kind of processing method of landfill leachate according to claim 1, which is characterized in that the modified chitin is adopted Prepared with following technique: it is 2.5- that 100-140 parts of concentration, which are added, in the chitin that 20-35 parts of deacetylations are 35-45% The sodium hydroxide solution of 3.5mol/L impregnates 1-3 days, filters, and hydrogen peroxide bleaching is added in washing, filters, and washs, dry, is added 1-3 parts of epoxy bromopropanes, 0.05-0.09 parts of maleic anhydrides, 0.5-0.9 parts of trimethylamine aqueous solutions, 0.001-0.003 parts of azos two Isobutyronitrile and 0.01-0.05 parts of tetrabutylammonium bromide stirred under pressure, mixing speed 400-700r/min, whipping temp 150- 170 DEG C, mixing time 15-35min, spray drying obtains modified chitin.
7. a kind of processing method of landfill leachate according to claim 1, which is characterized in that the anaerobic pond is using general Logical anaerobic nitrification, 35 DEG C, load is 1kgCOD/ (m3D), residence time 10d.
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