CN102992539B - Method for treating high-concentration ammonia-nitrogen landfill leachate - Google Patents
Method for treating high-concentration ammonia-nitrogen landfill leachate Download PDFInfo
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- CN102992539B CN102992539B CN201210426163.7A CN201210426163A CN102992539B CN 102992539 B CN102992539 B CN 102992539B CN 201210426163 A CN201210426163 A CN 201210426163A CN 102992539 B CN102992539 B CN 102992539B
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Abstract
The invention discloses a method for treating high-concentration ammonia-nitrogen landfill leachate, comprising the following steps of (1) placing an even mixture consisting of clay and river sand in proportion of (5: 1)- (7: 1) in a refuse anaerobic landfill box, adding 1% of denitrifying bacteria, nitrifying bacteria and nitrite bacteria in proportion of 2: 1: 1 into the waste anaerobic landfill box, and adding landfill leachate to be treated to carry out anaerobic treatment; (2) causing the landfill leachate which undergoes the anaerobic treatment to flow into a first collection reservoir and pumping into an SBR (Styrene Butadiene Rubber) aerobic tank by a pump to carry out aerobic treatment, enabling one part of the landfill leachate which undergoes the aerobic treatment to flow back to the landfill anaerobic landfill box after collecting by a second collection reservoir, and putting the other part of the landfill leachate which undergoes the aerobic treatment into a coagulation tank to carry out wastewater treatment; and (3) adding basic aluminum chloride into the wastewater in the coagulation tank to carry out chemical treatment, and then discharging the qualified wastewater. According to the method, stable treatment and qualified discharge can be carried out on the landfill leachate of the refuse landfills.
Description
Technical field
The present invention relates to waste disposal method, especially a kind for the treatment of process of high strength ammonia nitrogen-containing landfill leachate.
Background technology
Along with increase, the expansion of scale and the increasing of population of China's city quantity, municipal wastes also correspondingly increases rapidly.Since 1979, the annual average rate of increase of the municipal wastes of China reaches 8.98%, by 3,132 ten thousand tons in 1980, is surged to 10,748 ten thousand tons of nineteen ninety-five, has increased by 243.2%.In recent years, China's domestic waste formed to city and greenbelt ecotope the threat being on the rise already.To 298 cities, the whole nation, the survey showed that, and treatment and disposal municipal wastes inadequately, has not only caused serious sanitary deterioration, and will take a large amount of soils.The method of Urban Rubbish Disposal is quite a lot of, mainly contains: compost process, incineration disposal method and sanitary landfill method.In these three kinds of methods, sanitary landfill process is low, applied widely with its reduced investment, working cost, environment protecting significantly and dispose the features such as thorough, obtained the generally employing of countries in the world.China is developing country, economic base weakness, and this disposal of garbage that has determined China will be take sanitary landfill method with low cost as main, and therefore sanitary landfill method is considered to be best suited for the method for disposal of China's national situation.Since last century the eighties, domestic many big and medium-sized cities as: garbage sanitary filling field has all been set up in Beijing, Shanghai, Hangzhou, Shenyang, Guangzhou, Shenzhen, Xi'an etc. in succession.At present, tens of the existing garbage sanitary filling fields in the whole nation, also have the garbage sanitary filling field of large quantities of small and medium-sized cities in addition just in planning construction.
The problem that is difficult to avoid that municipal wastes sanitary landfill process exists, the pollution that the percolate producing in garbage loading embeading stabilization process causes water surrounding around.Percolate mainly contains three sources: the one, and external moisture, comprises the underground water of Atmospheric precipitation, surface water and infiltration; The 2nd, the be squeezed release of rear section initial aqueous of rubbish; The 3rd, organism a large amount of in garbage degradation process are converted into interior moisture that water, carbonic acid gas and methane etc. discharge under anaerobism and facultative microbe effect.Percolate is a kind of high concentrated organic wastewater of complicated, contains large amount of organic, suspended substance, ammonia nitrogen, heavy metal ion and pathogenic bacterium etc., and due to many factors such as physics, chemistry, biologies, water quality and quantity rangeability is very large.According to related documents, in percolate, COD concentration can reach 2000-50000mg/L, more than ammonia nitrogen concentration can reach 1000mg/L, and containing nearly 80 kinds of organism,, short cancer carcinogenic comprising pathogenic micro-organism and some and auxiliary auxocarcinogen matter.As can be seen here, percolate is a kind of high-intensity environomental pollution source, if do not added, processes and directly discharge, will cause severe contamination to surrounding environment and underground water source, more can limit application and the development of garbage sanitary filling treatment technology in China.At present, domestic each garbage sanitary filling field, through the operation of more than 10 years, has successively entered the peak output phase of percolate.The high-concentration ammonia nitrogenous wastewater of percolate, quantity discharged is large, complicated component, strong toxicity, large to environmental hazard, intractability is very large again, makes the pollution of ammonia nitrogen waste water and administers the great attention that is always subject to whole world field of Environment Protection.The extremely strong percolate of contaminative producing in garbage loading embeading process oozes very easily down polluted underground water, especially with the special karst landform in Southwestern China area, Groundwater ecological environment frailty, local resident drinking water source is mostly underground water, if deal with improperly, can bring significant damage to ecotope and HUMAN HEALTH; According to incomplete investigation, all unrealized qualified discharges of percolate that domestic nearly all sanitary filling field produces; Even in developed country, the control to percolate and improvement also lack ripe, feasible technical matters.Therefore effective processing of percolate has very urgently become one of difficult point of current home and abroad environment engineering field.
Summary of the invention
The object of the invention is to: a kind for the treatment of process of high strength ammonia nitrogen-containing landfill leachate is provided, can carries out stabilizing treatment, qualified discharge to the percolate of refuse landfill.
For achieving the above object, the present invention can take following technical proposals:
The treatment process of a kind of high strength ammonia nitrogen-containing landfill leachate of the present invention, is characterized in that comprising the following steps:
Step 1: the structure of rubbish anaerobism landfill case
Described rubbish anaerobism landfill case is airtight cylindrical vessel, the built-in even compound being formed by clay and river sand, and native sand ratio is 5:1-7:1 (mass ratio),
Negate nitrobacteria Pseudomonas fluorescens, nitrobacteria Nitrobacter opacus Sack and tri-kinds of bacterial classifications of nitrite bacteria Nitrosomonas monocella Nelson, with 2:1:1 proportioning, add described rubbish anaerobism landfill case, dosage is 1% of the interior described even mixture volume of case, pending percolate is added to rubbish anaerobism landfill case, carry out anaerobic treatment;
Step 2: collecting tank
Percolate through rubbish anaerobism landfill case anaerobic treatment flows into the first collecting tank, and the percolate in the first collecting tank pumps into SBR aerobic slot by pump and carries out aerobic treatment;
Through the percolate of described SBR aerobic slot aerobic treatment, a part is collected and is then passed back into rubbish anaerobism landfill case by the second collecting tank, and another part enters coagulation tank and further carries out wastewater treatment;
Step 3: coagulation tank
Waste water in coagulation tank adds aluminium chlorohydroxide, carries out chemical treatment, and then discharge reaches the waste water of emission standard.
Described pending percolate is: the mixed solution of the percolate in the percolate in fresh Landfill Leachate groove and aged Landfill Leachate groove.
Described cylindrical vessel is made by synthetic glass, and its diameter is 1 meter, and height is 5 meters.
Described denitrifying bacterium is Pseudomonas fluorescens Pseudomonas fluorescens, and Pseudomonas fluorescens substratum final concentration consists of (w/v): peptone 1%; Yeast extract paste 0.2%; Sucrose 1%; FeSO
47H
2o0.02%; Na
2s
2o
3; 0.008%; Solvent is water; PH6.8-7.8,30 ℃ of vibrations or aerated culture 5 days, obtain described Pseudomonas fluorescens Pseudomonas fluorescens k yeast culture thing, is stored in bacterium supplemental tank; Described nitrobacteria is Nitrate bacteria Nitrobacter opacus Sack, and Nitrate bacteria substratum final concentration consists of (w/v): Sodium Nitrite 0.1%; Sodium carbonate 0.1%; Dipotassium hydrogen phosphate 0.075%; Magnesium sulfate 0.003%; Manganous sulfate 0.001%; PH6.5, solvent is water; 24 ℃ of vibrations or aerated culture 5 days, obtain described Nitrate bacteria Nitrobacter opacus Sack yeast culture thing, is stored in bacterium supplemental tank; Described nitrite bacteria Nitrosomonas monocella Nelson substratum final concentration consists of (w/v): dipotassium hydrogen phosphate 0.1%; Ammonium sulfate 0.05%; Calcium chloride 0.75%; Sodium-chlor 0.03%; Magnesium sulfate 0.003%; Ferric sulfate 0.003%; PH6.5, solvent is water; Described nitrite bacteria Nitrosomonas monocella Nelson culture medium inoculated nitrite bacteria Nitrosomonas monocella Nelson, 24 ℃ of vibrations or aerated culture 5 days, cultured products is with 10 times of sterilized water dilutions, obtain nitrite bacteria Nitrosomonas monocella Nelson yeast culture thing, be stored in bacterium supplemental tank; Described bacterium supplemental tank and rubbish anaerobism landfill case pass through pipeline connection.
Compared with prior art the invention has the beneficial effects as follows: adopt technique scheme, described rubbish anaerobism landfill case is airtight cylindrical vessel, the built-in even compound being formed by clay and river sand, soil sand is than being 5:1-7:1 (mass ratio), this structure, has utilized the sorption etc. of refuse landfill ground flora after the Degradation of soil sanitation effect, Aerated Landfill Layers of covering layer of landfill site and final covering to carry out; Soil sanitation effect is the self cleaning that utilizes the Degradation and Transformation effect, biological fixnig effect, soil animal of the microorganism that inhabits soil etc. to carry out as feed.In addition, in soil, organic and absorption, complexing and huge legendary turtle mineral colloid are closed, the ion-exchange of soil, mechanical detention etc. also have certain effect to the processing of garbage leachate; Adopt the processing for recharging method treating refuse landfill percolate of denitrifying bacterium, nitrobacteria and three kinds of bacterial classifications of nitrite bacteria, overcome existing COD, the ammonia nitrogen not stable defect for the treatment of technology in degraded percolate from garbage filling field of recharging, and can make the degradation efficiency of COD, ammonia nitrogen increase, the time of processing further shortens.Under aerobic conditions, NH
4 +through the effect of Nitrite bacteria and Nitrate bacteria, be converted into nitrite and nitrate, under anaerobic, the denitrifying bacterium that belongs to heterotroph facultative anaerobe is nitrogen by nitrate radical or Nitrite reduction.Due to supplementary denitrifying bacteria and nitrifier (comprising Nitrite bacteria), in anaerobic treatment process and Aerobic, increased the effect of dominant bacteria respectively, be more conducive to improve ammonia nitrogen processing efficiency in waste water.
Accompanying drawing explanation
Fig. 1 is syndeton schematic diagram of the present invention.
Embodiment
Embodiment mono-:
As shown in Figure 1, the treatment process of a kind of high strength ammonia nitrogen-containing landfill leachate of the present invention, the equipment using comprises: airtight its diameter of rubbish anaerobism landfill case 4(of being made by synthetic glass is 1 meter, and height is 5 meters), the first collecting tank 1, the second collecting tank 2, SBR aerobic slot 3 (the present invention is 2 in parallel), coagulation tank 5, bacterium supplemental tank 8, fresh Landfill Leachate groove 6, aged Landfill Leachate groove 7 and reflux pump 9.The treatment step of high strength ammonia nitrogen-containing landfill leachate is:
Step 1: the structure of rubbish anaerobism landfill case
Certain aged refuse landfill percolate, in the 7 years length of time, its waste water composition is in Table 1.
Table 1 refuse leachate water quality
This percolate BOD
5: COD is 0.2:1, and biodegradability is poor, is the feature of typical old refuse landfill percolate.
The built-in even compound being formed by local mountain region clay and river sand of described rubbish anaerobism landfill case 4, clay is with river sand than being 7:1 (mass ratio), and what the test of anaerobism garbage loading embeading case adopted is successive reaction, adopts common anaerobic nitrification, 35 ℃, load as 1.2kgCOD/ (m
3d), residence time 10d(days) sample period is 2 days.In order to improve the treatment effect of rubbish anaerobism landfill case 4, negate nitrobacteria Pseudomonas fluorescens, nitrobacteria Nitrobacter opacus Sack and tri-kinds of bacterial classifications of nitrite bacteria Nitrosomonas monocella Nelson, with 2:1:1 proportioning, add described rubbish anaerobism landfill case 4, its bacterium liquid number is hundred million/mL of 1-2, dosage is 1% of the interior described even mixture volume of case, pending percolate is added to rubbish anaerobism landfill case 4, carry out anaerobic treatment.As preferably, the addition of three kinds of bacterium is to supplement once for every five days, through the supplementary bacterium amount of two months, depending on the quantity of dominant bacteria in native sand compound in rubbish anaerobism landfill case 4, then determines whether subsequent disposal also needs to supplement.
What rubbish anaerobism landfill case was processed COD, ammonia nitrogen continuously the results are shown in Table 2.
Table 2 rubbish anaerobism landfill case effluent quality
Step 2: collecting tank
Through the percolate of rubbish anaerobism landfill case 4 anaerobic treatment, flowing into percolate in the first collecting tank 1, the first collecting tank 1 pumps into SBR aerobic slot 3 by pump and carries out aerobic treatment; Through the percolate of described SBR aerobic slot 3 aerobic treatment, then a part is collected and is entered rubbish anaerobism landfill case 4 by reflux pump 9 by the second collecting tank 2, and another part enters coagulation tank 5 and further carries out wastewater treatment.
The dissolved oxygen of SBR aerobic slot is controlled at DO0.5-1mg/L, the working procedure of SBR is: water inlet 20～30min → aeration 6～8h → precipitation 30min → draining 50min, spoil disposal after drained water, 1/10 left and right that each spoil disposal is total inflow, mud age is 20～30d, moves 3 cycles every day.The SBR aerobic slot of this test is 2 and is connected in parallel.
Sbr reactor pond in parallel water quality after treatment is in Table 3.
Table 3 sbr reactor in parallel pond water quality after treatment
The reflux ratio (R) of this test is 20%, and hydraulic detention time (HRT) is 50h.
Step 3: coagulation tank
The aluminium chlorohydroxide of the waste water interpolation 3% in coagulation tank 5 carries out chemical treatment, and after treatment in Table 4, coagulation tank water outlet is limpider, and it the results are shown in Table 4.
Result is in Table 4.
Table 4 coagulation basin water quality after treatment
Step 4: fresh Landfill Leachate groove
The water quality of fresh Landfill Leachate groove is in Table 5.
The fresh Landfill Leachate water quality of table 5
Fresh Landfill Leachate and aged Landfill Leachate carry out proportioning to be mixed and adds rubbish anaerobism landfill case 4, can improve mature landfill leachate because of BOD
5: the low and difficult treatment problem that causes of COD.
Embodiment bis-:
Described denitrifying bacterium is Pseudomonas fluorescens Pseudomonas fluorescens, and Pseudomonas fluorescens final concentration consists of w/v: peptone 1%; Yeast extract paste 0.2%; Sucrose 1%; FeSO
47H
2o0.02%; Na
2s
2o
3; 0.008%; Solvent is water; PH6.8-7.8,30 ℃ of vibrations or aerated culture 5 days, obtain described Pseudomonas fluorescens Pseudomonas fluorescens k yeast culture thing, is stored in bacterium supplemental tank 8 standby; Described nitrobacteria is Nitrate bacteria Nitrobacter opacus Sack;
Nitrate bacteria substratum final concentration consists of w/v: Sodium Nitrite 0.1%; Sodium carbonate 0.1%; Dipotassium hydrogen phosphate 0.075%; Magnesium sulfate 0.003%; Manganous sulfate 0.001%; PH6.5, solvent is water; 24 ℃ of vibrations or aerated culture 5 days, obtain described Nitrate bacteria Nitrobacter opacus Sack yeast culture thing, is stored in bacterium supplemental tank 8 standby;
Described Nitrite bacteria substratum final concentration consists of w/v: dipotassium hydrogen phosphate 0.1%; Ammonium sulfate 0.05%; Calcium chloride 0.75%; Sodium-chlor 0.03%; Magnesium sulfate 0.003%; Ferric sulfate 0.003%; PH6.5, solvent is water; Described Nitrite bacteria culture medium inoculated Nitrite bacteria Nitrosomonas monocella Nelson, 24 ℃ of vibrations or aerated culture 5 days, cultured products is with 10 times of sterilized water dilutions, obtain Nitrite bacteria Nitrosomonas monocella Nelson yeast culture thing, be stored in bacterium supplemental tank 8 standby;
Described bacterium supplemental tank 8 is passed through pipeline connection with rubbish anaerobism landfill case 4.
The present invention screens denitrifying bacterium Pseudomonas fluorescens, nitrobacteria Nitrobacter opacus Sack and the nitrite bacteria Nitrosomonas monocella Nelson of acquisition, in Chinese culture presevation station in Institute of Microorganism, Academia Sinica, all there is preservation (to refer to " Chinese bacterial classification catalogue ", Chemical Industry Press, Beijing, 1 printing of 1 edition mat woven of fine bamboo strips of in July, 2007 mat woven of fine bamboo strips).Described denitrifying bacterium Pseudomonas fluorescens, its bacterial classification Chinese translation is Pseudomonas fluorescens, described nitrobacteria, bacterium is called Nitrate bacteria Nitrobacter opacus Sack, and its bacterial classification Chinese translation is opaque bacterium nitrobacter; Described nitrite bacteria Nitrosomonas monocella Nelson, its bacterial classification Chinese translation is unit cell Nitrosomonas.
Claims (4)
1. a treatment process for high strength ammonia nitrogen-containing landfill leachate, is characterized in that comprising the following steps:
Step 1: the structure of rubbish anaerobism landfill case
Described rubbish anaerobism landfill case (4) is airtight cylindrical vessel, the built-in even compound being formed by clay and river sand, and native sand ratio is 5:1-7:1 (mass ratio),
Negate nitrobacteria Pseudomonas fluorescens, nitrobacteria Nitrobacter opacus Sack and tri-kinds of bacterial classifications of nitrite bacteria Nitrosomonas monocella Nelson, with 2:1:1 proportioning, add described rubbish anaerobism landfill case (4), dosage is 1% of the interior described even mixture volume of case, pending percolate is added to rubbish anaerobism landfill case (4), carry out anaerobic treatment;
Step 2: collecting tank
Percolate through rubbish anaerobism landfill case (4) anaerobic treatment flows into the first collecting tank (1), and the percolate in the first collecting tank (1) pumps into SBR aerobic slot (3) by pump and carries out aerobic treatment;
Through the percolate of described SBR aerobic slot (3) aerobic treatment, a part is collected and is then passed back into rubbish anaerobism landfill case (4) by the second collecting tank (2), and another part enters coagulation tank (5) and further carries out wastewater treatment;
Step 3: coagulation tank
Waste water in coagulation tank (5) adds aluminium chlorohydroxide, carries out chemical treatment, and then discharge reaches the waste water of emission standard.
2. the treatment process of high strength ammonia nitrogen-containing landfill leachate according to claim 1, it is characterized in that, described pending percolate is: the mixed solution of the percolate in percolate and aged Landfill Leachate groove (7) in fresh Landfill Leachate groove (6).
3. the treatment process of high strength ammonia nitrogen-containing landfill leachate according to claim 1 and 2, is characterized in that: described cylindrical vessel is made by synthetic glass, and its diameter is 1 meter, and height is 5 meters.
4. the treatment process of high strength ammonia nitrogen-containing landfill leachate according to claim 1 and 2; it is characterized in that: described denitrifying bacterium is Pseudomonas fluorescens Pseudomonas fluorescens, and Pseudomonas fluorescens substratum final concentration consists of (w/v): peptone 1%; Yeast extract paste 0.2%; Sucrose 1%; FeSO
47H
2o 0.02%; Na
2s
2o
3; 0.008%; Solvent is water; PH6.8-7.8,30 ℃ of vibrations or aerated culture 5 days, obtain described Pseudomonas fluorescens Pseudomonas fluorescens yeast culture thing, is stored in bacterium supplemental tank (8);
Described nitrobacteria is Nitrate bacteria Nitrobacter opacus Sack, and Nitrate bacteria substratum final concentration consists of (w/v): Sodium Nitrite 0.1%; Sodium carbonate 0.1%; Dipotassium hydrogen phosphate 0.075%; Magnesium sulfate 0.003%; Manganous sulfate 0.001%; PH6.5, solvent is water; 24 ℃ of vibrations or aerated culture 5 days, obtain described Nitrate bacteria Nitrobacter opacus Sack yeast culture thing, is stored in bacterium supplemental tank (8);
Described nitrite bacteria Nitrosomonas monocella Nelson substratum final concentration consists of (w/v): dipotassium hydrogen phosphate 0.1%; Ammonium sulfate 0.05%; Calcium chloride 0.75%; Sodium-chlor 0.03%; Magnesium sulfate 0.003%; Ferric sulfate 0.003%; PH6.5, solvent is water; Described nitrite bacteria Nitrosomonas monocella Nelson culture medium inoculated nitrite bacteria Nitrosomonas monocella Nelson, 24 ℃ of vibrations or aerated culture 5 days, cultured products is with 10 times of sterilized water dilutions, obtain nitrite bacteria Nitrosomonas monocella Nelson yeast culture thing, be stored in bacterium supplemental tank (8);
Described bacterium supplemental tank (8) is passed through pipeline connection with rubbish anaerobism landfill case (4).
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| CN105602868A (en) * | 2016-01-22 | 2016-05-25 | 南京贝克特环保科技有限公司 | Microbial nutritional agent for rapidly treating waste leachate of waste incineration plant and production process thereof |
| CN105906049B (en) * | 2016-05-20 | 2019-01-15 | 中原工学院 | A kind of garbage filter concentrate advanced treatment process |
| CN107858295A (en) * | 2017-11-27 | 2018-03-30 | 天津工业大学 | One plant is applied to high ammonia nitrogen landfill leachate processing bacterium and its application |
| CN110174382B (en) * | 2019-05-23 | 2020-11-20 | 安徽维嵩生产力促进有限公司 | Device for detecting sewage bacteria concentration |
| CN113186146A (en) * | 2021-05-13 | 2021-07-30 | 深高蓝德环保科技集团股份有限公司 | Method for culturing microbial agent by using town landfill leachate |
Citations (3)
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|---|---|---|---|---|
| CN101007684A (en) * | 2007-01-19 | 2007-08-01 | 华南理工大学 | Anerobic ammoxidation and denitrification synergistic denitrification method for garbage leachate |
| CN102101720A (en) * | 2011-01-11 | 2011-06-22 | 彭永臻 | Device and method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water |
| CN102701452A (en) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | Closed-loop control system for treating landfill leachate in cooperation with partial nitrosation and denitrification and denitrifying and decarburizing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007684A (en) * | 2007-01-19 | 2007-08-01 | 华南理工大学 | Anerobic ammoxidation and denitrification synergistic denitrification method for garbage leachate |
| CN102101720A (en) * | 2011-01-11 | 2011-06-22 | 彭永臻 | Device and method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water |
| CN102701452A (en) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | Closed-loop control system for treating landfill leachate in cooperation with partial nitrosation and denitrification and denitrifying and decarburizing method thereof |
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