CN1351969A - Purifying treatment method for diffusion water of garbage burying ground - Google Patents
Purifying treatment method for diffusion water of garbage burying ground Download PDFInfo
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Abstract
The present invention relates to a percolating water treating process for garbage burying field. Stabilized garbage and mineralized garbage from the garbage burying field is first utilized to constitutea biological reaction bed and the garbage percolating water is then pumped and sprayed via water distributor to the reaction bed. The percolating water is purified by means of the adsorption and degradation of the mineralized garbage before exhausted from the bed botto, and finally attains the relevant discharging standard of the state. The said process has low operation cost, and has COD, BOD, NH3-N eliminating rate as high as 90-99%. The present invention may be used widely in various garbage burying fields.
Description
At present the domestic waste in China every year is collected the amount of clearing and is reached 1.2 hundred million tons, and only Shanghai City just has 4,860,000 tons every year, occupies national best.The outlet of these rubbish mainly is sanitary landfill.The sanitary filling field or the accurate sanitary filling field of China's standard are a lot of at present.The day output of each landfill yard is at the 200-5000 ton, and a year amount of landfill is roughly more than 8,000 ten thousand tons.Another part rubbish is then being stacked a stacking.
The garbage percolation water that water that is produced by microbiological degradation behind original moisture, garbage loading embeading in the rubbish and atmospheric precipitation and rainwash are formed is a kind of smelly high concentrated organic wastewater of deceiving.It has following feature: organic contamination substrate concentration height; Ammonia-nitrogen content was higher during mineral-type was polluted, and the content of phosphorus is on the low side, caused the nutritive props imbalance; Metal ion content is higher; Suspension content and colourity are higher.Water from diffusion water quality changes with the length of landfill time: the landfill time below 5 years to ooze draining pH value lower, BOD
5And CODcr concentration is higher, and BOD
5The ratio of/CODcr is higher, and the concentration of all kinds of heavy metal ion is also higher simultaneously.The landfill time was oozed draining pH value near neutral, BOD more than 5 years
5And the CODcr density loss, BOD
5The ratio of/CODcr is lower, and NH
3-N concentration is higher, and the concentration of heavy metal ion then descends.Owing to antiseepage at the bottom of the field, ooze that draining is handled and aspects existing problems such as rubbish covering, domestic many landfill yards also do not reach proper sanitary landfill.The water from diffusion of domestic all refuse landfills does not at present all reach first discharge standard (COD＜100mg/L, BOD＜30mg/L, NH
3-N＜15mg/L).Overwhelming majority landfill yard water from diffusion is carried out secondary discharge standard (COD＜300mg/L, BOD＜150mg/L, NH
3-N＜25mg/L), but still inaccessible this standard.Reach secondary discharge standard, processing cost is very high, and technology is very complicated.
Up to now, the home and abroad is to the garbage percolation water technology, integrates to be divided into following a few class:
(1) biological pond method
Biological pond claims oxidation pond or stabilization pond again, is the structures that wastewater treatment is carried out in a kind of pond that utilizes natural or manual amendment, comprises aerobic and anaerobic pond.The anaerobe pool allows the organic loading height of admittance, so often handle the pre-treatment measure on the pool as aerobe, for high density organic waste waters such as water from diffusions, treat effluent concentration is generally CODcr 1000mg/L, BOD
5More than the 400mg/L.But just general oxidation pond is handled, every day 500 tons of water from diffusions, only the electricity charge of aeration just need 100,000 yuan/month, water from diffusion just reaches 20-30 days, the COD＞500mg/L of water outlet, BOD＞350mg/L, NH in the residence time on oxidation pond, the oxygen pool of holding concurrently
3-N＞100mg/L is far above secondary discharge standard.
(2) biomembrance process and activated sludge process
As traditional bioremediation, biomembrance process and activated sludge process all are used in the processing of garbage seeping water.Biomembrance process and activated sludge process have mature theory foundation comparatively and than the service experience of horn of plenty, but in water from diffusion is handled because the variation of the water from diffusion water quality and the water yield, the composition of the complexity of water from diffusion produces obstruction to reaching stable operation condition on the one hand, on the other hand, aerobic process is often because not high, the big and less employing of power consumption of oxidation effect.Activated sludge process is not high to the treatment effect of other high concentrated organic wastewater, but garbage seeping water is had the good treatment effect.But, the processing of mud then is a problem.
(3) anaerobic biological treatment
Anaerobic biological treatment has many advantages, shows as less energy consumption, and the mode of anaerobic biological treatment has anaerobic biofilter, anaerobism contact process, upflow anaerobic sludge blanket reactor and segmentation anaerobic digestion etc., facts have proved that anaerobic biological treatment is to high density (BOD
5〉=2000mg/L) processing of organic waste water is effectively, but generally can not adopt anaerobic biological treatment high concentrated organic wastewater such as water from diffusion etc. separately.
(4) soil is handled
The processing that is used for sanitary sewage is handled in the soil more, its principle is to utilize the Degradation and Transformation effect and the biological fixnig effect of soil microorganisms (good gas and anaerobic microorganism), and the ion-exchange of the absorption of organism and mineral colloid, complexing, chelating, soil in the soil in addition, mechanical detention effect also have certain effect to the processing of water from diffusion.The soil one plant treatment method that development in recent years is got up mainly contains following three process: A. by absorption, ion-exchange or precipitating action, and soil particle filters out suspended solids from water from diffusion, and the soluble solid component is adsorbed on the particle.B. microorganism transforms the organism in the water from diffusion and stable in the soil, and transforms organonitrogen.C. vegetation utilizes the various nutrition growths of water from diffusion, with the infiltration capacity of maintenance and increase soil, and by the transpiration minimizing diafiltration water yield.
The soil is handled and to be proved to be a kind of economical and effective in practice, can replace tertiary treatment, can replace the technology of second-stage treatment again.People have developed slow land treatment system (SR), diafiltration (RI) fast, face of land slug flow (OF), wet land system (WL), subsurface infiltration land treatment system (UG) and artificial soil block filtration system multiple land treatment systems such as (ARI).
(5) materialization is handled
Materialization is handled, and comprises technology such as flocculation/precipitation, membrane sepn, charcoal absorption, chemical oxidation, wet oxidation, catalyst oxidation, stripping, evaporation, generally is suitable for the advanced treatment of water from diffusion.Processing cost is higher.
Can think that the home and abroad is not still obtaining fine solution aspect the water from diffusion processing.
The purpose of this invention is to provide that a kind of technology is simple, with low cost, good, the complete especially method that can reach secondary discharge standard of treatment effect.
Since 1992, Tongji University has carried out the stabilization research of refuse landfill under state natural sciences fund subsidies such as (NO59778016), reliable prediction rubbish insert water from diffusion Pollutant levels behind the landfill yard, rubbish is formed and the quantitative relationship of landfill yard surface settlement amount and time.With regard to the Shanghai City refuse landfill, in the first three years behind the garbage loading embeading, rubbish is in quick degradation period, water from diffusion concentration height, and surface settlement speed is fast, and it is complicated that rubbish is formed variation; After 3 years, biodegradable thing etc. descends along with the passing of landfill time in each parameter such as water from diffusion COD, BOD, the rubbish; Approximately landfill behind the 8-10, rubbish is harmlessization and stabilization basically just.The rubbish of this moment is referred to as mineralized waste in this article.This rubbish no longer includes intensive stench taste, can dry naturally and does not produce water from diffusion.External appearance characteristic is similar to soil ulmin, is the microaggregate shape, and these aggressiveness outer rims are smooth, and it is loose diffusing to build knot, the total pore space is many, and pores'growth is good, and sinuousness is bigger, and be dendroid and network-like, it is smooth to have countless atomic holes and a hole wall, therefore has huge surface-area.In addition, consider from the composition of garbage seeping water, microorganism in the rubbish is through after taming for a long time, have stronger degraded garbage seeping water (or organic waste water of other high density) and the opposing heavy metal of higher concentration and the ability of harmful and noxious substance, from but the more superior Biomedia of a kind of performance.
Based on above theoretical foundation and true background, we set about studying the biodegradability of the bio-reaction bed of forming with mineralized waste and this reaction bed to the treatment effect of landfill yard garbage seeping water, control useless (waste water) treating refuse water from diffusion technology thereby developed with useless (rubbish).
Treatment step of the present invention is as follows:
Be filled with in the bio-reaction bed of rubble bottom packing into behind the foreign material such as at first that mineralized waste screening rejecting particle is bigger stone, glass cullet, undegradable rubber, plastics, waddy.The garbage seeping water that will be collected in then in the water tank arrives the vertical water distributor of bio-reaction bed with the pump extracting, utilizing the water pressure of pump will ooze draining evenly is sprayed on the mineralized waste, organic pollutant in the water from diffusion is earlier by the surface of mineralized waste and internal surface absorption, under the action of microorganisms that grows, the organism that is adsorbed is degraded, and the surface of vacateing is adsorbed with organic pollutants again.So circulation is gone down, thereby makes COD in the water from diffusion, BOD, NH
3-N clearance reaches the above decontamination effect improving of 90-99%.Bottom from bio-reaction bed gives off purifying waste water of allow compliance with emission standards at last.Mineralized waste is meant the rubbish of domestic waste more than landfill yard landfill 5-100.The hydraulic load that the pump of draining is oozed in extracting can be chosen in 7.5-500 liter/every cubic metre mineralized waste every day, and extracting also can cease the formula extracting between 1-3 hour continuously.
The present invention has following advantage:
1. owing to adopted the mineralized waste that can play absorption and degrade dual function active filler, so the COD of the water from diffusion after the processing can be from 2000-10000mg/L, BOD 1000-10000mg/L, NH as bio-reaction bed
3-N 250-1500mg/L, BOD/COD 0.2-0.7 are reduced to 100-300,60-150,0-25mg/L respectively, and clearance reaches more than the 90-99%, and the draining that oozes after the present invention handles meets national secondary discharge standard.
2. because equipment required for the present invention is simple, need not aeration when handling water from diffusion, need not other working costs except that promoting that the transportation water from diffusion is, so no matter be investment or operation, its cost is extremely low, about 10-30% that only accounts for conventional treatment method.
3. because the organic concentration gradient that exists between the absorption carrier in water from diffusion and the mineralized waste, organism in the water from diffusion just can be adsorbed in the rubbish smoothly, thereby for the microbial growth breeding provides the nutrition base, simultaneously, after microbial reproduction gets up, microorganism is strengthened to organic adsorption, the particularly microorganism adsorption to heavy metal ion, so adsorption reaches extremely good effect.
4. during the intermittent loading mode among employing the present invention, microorganism can utilize the intermittent time that pollutent is degraded fully.In the time intermittently, aerobic microbiological can utilize competent oxygen branch growth breeding in nutritive substance and the reaction bed epimere, reaction bed hypomere anaerobism or facultative anaerobe utilize the reaction product of undegradable nutritive substance of aerobic section and aerobic section further to react, such as denitrification, denitrifying bacteria utilizes the nitration product of aerobic section that nitrate nitrogen and nitrous acid nitrogen transformation are N
2And N
2O.In the intermittent operation process, the reaction bed epimere because the evaporation of moisture, ooze down, oxygen parts such as consumption of microorganism reduce gradually, utilize feeding and intermittent to carry out reoxygenation, more help the air admission reaction bed, the oxygen that the degraded of postreaction bed internal contamination thing causes divides consumption, so Degradation reaches extremely good effect.
5. method of the present invention is convenient to operation, flexible operation, and convenient management is subjected to the influence of ambient conditions less, and impervious drainage concentration impact load is strong, purifies water quality stabilizing.
Description of drawings
Fig. 1 is a process flow diagram of the present invention
Fig. 2 is BOD and NH when using method of the present invention
3The relation of-N clearance and water from diffusion hydraulic load
In conjunction with the accompanying drawings the present invention is described in detail
See also Fig. 1 earlier, at first water from diffusion is collected in the water tank 1, with pump 2 water distributor 3 is arrived in the water from diffusion extracting then, by water distributor 3 with water from diffusion be sprayed in the end be filled with rubble 6, the top of the bio-reaction bed 4 of mineralized waste 5 is equipped with on top, water from diffusion is through after the absorption and Degradation of mineralized waste 5, will meet purifying waste water of national secondary discharge standard from the bottom of reaction bed 4 and be collected in water collecting basin 7 backs and wait for discharging.
Then see also Fig. 2, wherein curve 8 is NH
3The relation of-N clearance and water from diffusion hydraulic load, curve 9 are the relation of BOD clearance and water from diffusion hydraulic load.As seen from Figure 2, when hydraulic load from 7.5 L/m
3D is increased to 200 L/m
3During d, the BOD clearance has dropped to 99.6% a little from 99.9%, and ammonia nitrogen from the beginning 100% (can not detecting) slightly dropped to 99.7%.Though the clearance of two indexs all descends to some extent with the hydraulic load increase, has remained high clearance, illustrate that the removal of reaction bed 4 couples of BOD, NH3-N that mineralized waste is formed is efficiently.
Adopt the water from diffusion of three kinds of different concns to describe method of the present invention as three embodiment below respectively: first kind is through abundant adjusting and blended dilution water from diffusion (being called for short equalizing tank 1 water from diffusion), this kind water from diffusion Pollutant levels are low, and the BOD/COD value is higher; Second kind of water from diffusion that mainly produces from the landfill unit that is using, this water from diffusion concentration height, biochemical extreme difference; The third sees Table 1 for the higher equalizing tank water from diffusion of the concentration of another time (be called for short equalizing tank 2 and ooze draining).
The essential property of three employed three kinds of water from diffusions of embodiment of table 1
| Kind | The water intaking place | ????COD ??(mg/L) | ????BOD ??(mg/L) | ??BOD/ ??COD | ??NH 3-N ??(mg/L) | Outward appearance | Stink |
| Equalizing | ??3118.0 | ??542.3 | ??0.17 | ??493.4 | Aterrimus | Stench | |
| Ongoing landfill unit | ??3306.7 | Below 100 | ??0.03 | ??1366.4 | Pale brown look | Stench | |
| Equalizing tank 2 | ??6493.0 | ??1249.4 | ??0.19 | ??654.1 | Aterrimus | Stench |
The mineralized waste 5 of filling is the rubbish of Shanghai refuse landfill nineteen ninety landfill in the reaction bed 4.After this rubbish digs out through screening, reject stone that wherein particle is bigger, glass cullet, not fully behind the foreign material such as the rubber plastic of degraded and wooden stick stationery as the biologic packing material of reaction bed, the mineralized waste essential property sees Table 2.
The essential property of 10 years mineralized wastes of table 2
| Character | Weight (Kg) | Volume (m 3) | Water ratio (%) | Maximum particle diameter (mm) | Number of bacteria (10 5The dried rubbish of individual/g) | Basic proterties |
| Parameter value | ??300 | ??0.4 | ??13.2 | ????5 | ????1.2 | Be the silty loam shape |
First kind of listed in the above-mentioned table 1 equalizing tank 1 water from diffusion arrived rotary water distributor 3 by pump 2 extractings, and the water yield is controlled at 50-200L water from diffusion/m
3Mineralized waste/sky.Water distributor 3 evenly is sprayed at the top of reaction bed 4 by the discharge pressure head rotation water distributing of pump 2.Operation finds that the breeding of the microorganism growth in the mineralized waste 5 is vigorous in the reaction bed 4, COD, BOD, the NH of the water from diffusion that comes out from reaction bed 4 bottoms
3-N removal effect is remarkable.The removal of water from diffusion COD sees Table 3.
Table 3 mineralized refuse bioreactor is to the removal (time span 1 year) of first kind of water from diffusion COD
| Hydraulic load (L water from diffusion/m3 mineralized waste/sky) | Organic loading (g COD/m 3Mineralized waste/sky) | ????COD(mg/L) | Clearance (%) | |
| Water inlet | Water outlet | |||
| ????7.5 | ????23.4 | ??3118.0 | ????87.9 | ????97 |
| ????7.5 | ????23.4 | ??3118.0 | ????75.9 | ????98 |
| ????7.5 | ????23.2 | ??3095.1 | ????93.3 | ????97 |
| ????50 | ????154.8 | ??3095.1 | ????91.3 | ????97 |
| ????50 | ????138.0 | ??2760.0 | ????113.1 | ????96 |
| ????50 | ????138.0 | ??2760.0 | ????117.1 | ????96 |
| ????50 | ????111.1 | ??2222.1 | ????95.2 | ????96 |
| ????50 | ????111.1 | ??2222.1 | ????142.8 | ????94 |
| ????50 | ????82.2 | ??1643.6 | ????102.7 | ????94 |
| ????50 | ????82.2 | ??1643.6 | ????104.0 | ????94 |
| ????50 | ????78.6 | ??1572.9 | ????134.9 | ????91 |
| ????50 | ????78.6 | ??1572.9 | ????87.3 | ????94 |
| ????150 | ????214.3 | ??1428.5 | ????166.7 | ????88 |
| ????150 | ????214.3 | ??1428.5 | ????146.8 | ????90 |
| ????150 | ????199.0 | ??1325.8 | ????148.1 | ????89 |
| ????150 | ????199.0 | ??1325.8 | ????144.0 | ????89 |
| ????150 | ????199.0 | ??1325.8 | ????181.1 | ????86 |
| ????150 | ????199.0 | ??1325.8 | ????187.2 | ????86 |
| ????200 | ????246.9 | ??1234.6 | ????156.4 | ????87 |
| ????200 | ????246.9 | ??1234.6 | ????135.8 | ????89 |
| ????200 | ????246.9 | ??1234.6 | ????152.3 | ????88 |
Reaction bed has very strong removal ability to water from diffusion colourity, and the black of water inlet disappears, and water outlet is almost the same with tap water.Tasteless colourless.
Microorganism in the mineralized waste reaction bed is carried out determination and analysis, the results are shown in Table shown in 4.
The analysis (10 of microorganism number in table 4 reaction bed
7The dried rubbish of individual/g)
| Former dried rubbish | The top layer | 25 centimeters | 50 centimeters | |
| 0.012 | ??1.3 | ??8.6 | ??4.5 | |
| | ??2.2 | ??9.2 | ??3.6 | |
| Sample 2 | ??3.4 | ??7.9 | ??3.8 |
As can be seen from Table 4, microbe number in the more former dried mineralized waste 5 of number of microorganism in the mineralized waste 5 in the bio-reaction bed 4 in service has increased by 2～3 orders of magnitude, illustrated that microorganism is profuse in the reaction bed 4, this has just established biological basis for the biological treatment of water from diffusion.In addition, different depths microbe number from reaction bed 4 has shown extremely strong regularity equally.
Embodiment 2
Second kind of water from diffusion is brownish black, and after placement for some time, the COD value there is no obvious decline, and does not grow a large amount of microorganisms as first kind of water from diffusion in the water from diffusion, more do not have the sorrel foam and occurs.From above phenomenon as can be seen, the non-constant of this water from diffusion biodegradability, and NH
3-N concentration is very high.Adopt method of the present invention that second kind of water from diffusion is sprayed at mineralized waste 5 tops and carry out purifying treatment.Along with the increase of water from diffusion amount of inlet water, the water from diffusion water outlet COD after the purifying treatment also progressively reduces.When hydraulic load is 100L/m
3D, the COD clearance maintains about 60%, water inlet COD concentration 3026.9mg/L, effluent COD concentration 1134.1mg/L, and the water outlet color is pale brown look always.4 couples of water from diffusion BOD of reaction bed and NH
3-N still has certain clearance, and is as shown in table 5.
Table 5 reaction bed is to water from diffusion BOD and NH
3The removal of-N
| Hydraulic load (water inlet number of times) (L/m 3*d) | BOD(mg/L) | Clearance (%) | ??NH 3-N(mg/L) | Clearance (%) | ||
| Water inlet | Water outlet | Water inlet | Water outlet | |||
| ????300 | 73.7 | ??1.3 | ??98.3 | ??1366.4 | ??69.40 | ??94.9 |
| ????200 | 59.1 | ??1.1 | ??98.1 | ??1216.6 | ??87.70 | ??92.8 |
| ????100 | 69.2 | ??1.0 | ??98.6 | ??1216.6 | ??68.50 | ??94.4 |
As can be seen from Table 5, the BOD and the NH of 4 pairs of second kind of water from diffusions of reaction bed
3The clearance of-N is respectively more than 98% and 92%.Though the clearance of water from diffusion BOD is still higher, mainly be because the BOD concentration in the former water from diffusion is very low, the adsorption of mineralized waste is enough to its most of cause of removing.The clearance of NH3-N is more than 92% in addition.
PH to microorganism in the reaction bed 4 and water from diffusion water-in and water-out measures, and the result is as shown in table 6 below:
The pH measurement result of microorganism and water from diffusion water-in and water-out in table 6 reaction bed
| ????pH | Microorganism number (* 10 5Individual/as to restrain dried rubbish) | |||
| Water inlet | Water outlet | The top layer | 25 centimeters | 50 centimeters |
| ????8.84 | ????6.84 | ????3.1 | ????5.6 | ????4.5 |
| ????8.46 | ????6.74 | |||
| ????8.32 | ????6.90 | |||
| ????8.48 | ????7.08 | ????4.2 | ????6.2 | ????3.8 |
As can be seen from Table 6, the pH of water from diffusion water inlet is higher, generally about 8.5, show higher basicity, and the pH of water from diffusion water outlet is lower, presents more weak acidity.There is the anaerobic acidification reaction to exist in this explanation reaction bed.From the number of microorganism, it is many that the microbe number when microbial numbers is handled than first kind of water from diffusion in the reaction bed will lack, and on average reduced an order of magnitude.Thereby in the explanation reaction bed action of microorganisms a little less than, and can not become the principal element that reaction bed is removed pollutent.
Reaction bed has certain removal to water from diffusion colourity, and the black of water inlet disappears, and the water from diffusion water outlet is pale brown look.After water outlet is placed for some time naturally, there is a large amount of yellow solid matter to separate out, the empyreumatic taste of hair is arranged during with fiery calcination, prove organic substances such as containing partial protein in the solid matter, remain and be pale powder, should be the inorganic salts of calcium, silicon etc.
To COD=6493.0mg/L, BOD=1249.4mg/L, NH
3-N=654.1mg/L, the bio-reaction bed 4 top purifying treatment that the third water from diffusion extracting of the equalizing tank 2 of BOD/COD=0.19 is formed to mineralized waste 5.The third water from diffusion of equalizing tank 2 and first kind of similar water from diffusion of equalizing tank 1 are tested, and purpose mainly is for 4 pairs of biochemicals of confirmatory reaction bed treatment effect of water from diffusion preferably.Test-results sees Table 7.
Table 7 mineralized waste reaction bed is handled the third water from diffusion result (be 1 year working time)
| Hydraulic load (L/m 3d) | COD (the gCOD/m that loads 3????d) | ????COD ??(mg/L) | Clearance (%) | NH 3-N(mg/L) | Clearance (%) | ||
| Water inlet | Water outlet | Water inlet | Water outlet | ||||
| ????100 | ??649.3 | 6493.0 | ?336.7 | ?94.8 | ?654.1 | ?16.4 | ?97.5 |
| ????100 | ??649.3 | 6493.0 | ?293.4 | ?95.5 | ?654.1 | ?14.8 | ?97.7 |
| ????100 | ??649.3 | 6493.0 | ?356.7 | ?94.5 | ?654.1 | ?22.6 | ?96.5 |
| ????100 | ??649.3 | 6493.0 | ?347.4 | ?94.6 | ?654.1 | ?24.1 | ?96.3 |
| ????100 | ??649.3 | 6493.0 | ?296.6 | ?95.4 | ?654.1 | ?24.7 | ?96.2 |
| ????100 | ??649.3 | 6493.0 | ?316.5 | ?95.1 | ?654.1 | ?18.1 | ?97.2 |
| ????100 | ??649.3 | 6493.0 | ?289.1 | ?95.5 | ?654.1 | ?14.6 | ?97.8 |
As can be seen from Table 7, the mineralized waste reaction bed also is unusual ideal to the third water from diffusion treatment effect.To the clearance of COD more than 94%, to NH
3The clearance of-N is more than 96%.In addition, from the table it can also be seen that, the water from diffusion effluent COD concentration about 300mg/L, water outlet NH
3-N concentration has reached national secondary discharge standard substantially below 25mg/L.
Claims (3)
1. the purifying treatment method of a diffusion water of garbage burying ground is characterized in that: at first mineralized waste (5) is screened, rejects the bottom of packing into behind stone that wherein particle is bigger, glass cullet, undegradable rubber, plastics, the waddy and be filled with in the bio-reaction bed (4) of rubble (6); To be collected in then garbage seeping water in the water tank (1) with pump (2) extracting to the vertical water distributor of bio-reaction bed (4) (3), utilize the water pressure of pump will ooze draining and evenly be sprayed on the mineralized waste (5); By the surface of mineralized waste (5) and internal surface absorption, under action of microorganisms, degrade earlier by the organism that is adsorbed for organic pollutant in the water from diffusion, and the surface of vacateing is adsorbed with organic pollutants again, and so circulation makes COD, BOD, the NH in the water from diffusion
3The clearance of-N reaches 90-99%; Give off purifying waste water of allow compliance with emission standards at last is stored in the water collecting basin (7) and enters water body from the bottom of bio-reaction bed (4).
2. the purifying treatment method of a kind of diffusion water of garbage burying ground according to claim 1, it is characterized in that: the extracting hydraulic load of pump (2) can be chosen in 7.5-500 liter/every cubic metre of mineralized waste (L/m every day
3D), extracting continuously also can promote water from diffusion and be sprayed on the mineralized waste (5) by water distributor (3) every breath formula between 1-3 hour.
3. the purifying treatment method of a kind of diffusion water of garbage burying ground according to claim 1, it is characterized in that: described mineralized waste (5) is meant that domestic waste is at the rubbish in 5 years-100 years of landfill yard landfill.
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| CN100567185C (en) * | 2007-07-19 | 2009-12-09 | 同济大学 | Utilize the method for mineralising sludge treatment mature landfill leachate |
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