CN103030247A - Method for treating sewage by organism-soil infiltration and device for realizing method - Google Patents
Method for treating sewage by organism-soil infiltration and device for realizing method Download PDFInfo
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- CN103030247A CN103030247A CN2011103031510A CN201110303151A CN103030247A CN 103030247 A CN103030247 A CN 103030247A CN 2011103031510 A CN2011103031510 A CN 2011103031510A CN 201110303151 A CN201110303151 A CN 201110303151A CN 103030247 A CN103030247 A CN 103030247A
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Abstract
The invention discloses a method for treating sewage by organism-soil infiltration. The method for treating the sewage by the organism-soil infiltration mainly comprises the following steps of: 1, performing an anaerobic reaction on the sewage so as to convert degradable macromolecular organic matter into micromolecules under an anaerobic environment; 2, mixing effluent after an aerobic reaction with effluent after the anaerobic reaction, then, distributing in soil, purifying water quality under a soil-microorganism-plant combined action, and performing denitrification on nitrates in the sewage to change into nitrogen (N2) under an anoxic condition to escape; 3, performing aerobic treatment on the effluent in the soil so as to digest residual organic matter in the sewage; discharging part of the effluent after residual ammonia nitrogen is removed, mixing part of the effluent with the effluent after the anaerobic reaction, and then, distributing into the soil; and 4, returning sludge after the aerobic treatment into the soil for use to serve as a fertilizer for plant growth. The invention also provides a device for realizing the method.
Description
Technical field
The invention belongs to sewage disposal technology, relate to particularly the method that city domestic sewage or industrial sewage are processed in a kind of biology-soil filtration.
The invention still further relates to a kind of device for realizing aforesaid method.
Background technology
Biomembrance process is to grow up on the basis of activated sludge process, is a kind ofly to be the membranaceous carrier surface that is attached to by microorganism and to form.By contacting with sewage, in the microorganism panning sewage on the filler pollution substance as the metabolism that is used of the required nutrient of growth, thereby sewage is purified.Compare activated sludge process, biomembrance process produces mud and greatly reduces, treatment effect also improves greatly, but the mud that produces still can't be processed, and because the limitation of biological process, the phosphorus majority in the sewage is stored in the mud in the microorganism, constantly under the inrichment, total phosphorus concentration constantly raises in the mud, and excess sludge is difficult to process.
Soil filtration equipment is a kind of natural, ecological treatment process, with energy-conservation, resource-saving as guiding theory, giving through engineering approaches, practical creation a kind of small-scale Novel sewage purification techniques out, is that the composite purifying process of sanitary sewage is processed in comprehensive utilization soil-filler-microorganism-plant acting in conjunction.Existing soil filtration occupation area of equipment is large, and the soil capillarity finestructure is blocked easily in sewage treatment process, causes the stagnation of system's operation.
Summary of the invention
The method that the object of the present invention is to provide a kind of biology-soil filtration to dispose of sewage.
Another purpose of the present invention is to provide a kind of device of realizing aforesaid method.
For achieving the above object, the method that biology-soil filtration provided by the invention is disposed of sewage, its step comprises:
1) sewage carries out anaerobic reaction, under anaerobic environment, the larger molecular organics of easily degrading is converted into small molecules;
2) will through aerobic be deployed in the soil after the water outlet of anaerobic reaction mixes, under the comprehensive action of soil-microorganism-plant, purify water, and under anoxia condition in the sewage nitrate radical by denitrification be N2 dissipation out;
3) aerobic treatment is carried out in the water outlet in the soil, to clear up in the sewage remaining organism, remove remaining ammonia nitrogen rear portion and discharge, a part be deployed in the soil after the water outlet of anaerobic reaction mixes;
4) mud after the aerobic treatment returns and uses in the soil, as the fertilizer of plant-growth.
Described method, wherein, the temperature that sewage carries out anaerobic treatment is 25-35 ℃, pH=7.5-8.5.
The device of realization aforesaid method provided by the invention, it mainly is comprised of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor; Wherein:
The lower end is provided with agitator in the anaerobe membrane reactor, and the water outlet of this anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment water-in; The agitator top is provided with filler in the anaerobic biological reactor, and growth has the anaerobe film on the filler;
Soil filtration equipment is followed successively by surface soil layer, sandy soils, filtering layer and water guide layer from top to bottom; The surface soil layer is used for plant, and soil layer is comprised of sand and mixing with soil, and filtering layer is non-woven fabrics, the gravel filling of water guide layer for laying;
The water outlet of soil filtration equipment is connected to the water-in of aerobic biofilm reactor;
Aerobic biofilm reactor is provided with two water outlets, and the first water outlet is used for water outlet, and the second water outlet is connected with anaerobe membrane reactor water outlet;
The aerobic biofilm reactor interior lower end is provided with aeration plate, and the aeration plate top is provided with filler, and growth has aerobic biologic membrane on the filler.
Described device, wherein, all establish the bottom of anaerobe membrane reactor and aerobic biofilm reactor is mud discharging mouth.
Described device, wherein, the aeration plate of aerobic biofilm reactor connects aerator by a under meter.
Described device, the water outlet of anaerobe membrane reactor are connected to the water distributing pipe of soil filtration equipment by water pump.
Described device, wherein, water distributing pipe is the perforation pvc pipe, and pipe external parcel one deck geotextile prevents from stopping up, and geotextile external parcel one deck has the iron carbon filler of little electrolytic functional.
Described device, wherein, water-in and the water outlet of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor are equipped with electromagnetic valve respectively.
Described device, wherein, the water outlet of soil filtration equipment is connected to the water-in of aerobic biofilm reactor through settling tank.
Described device, wherein, the anaerobe membrane reactor is inner and aerobic biofilm reactor inside all is equipped with the heating zone and warming is popped one's head in, and is connected with warming and connects respectively the temperature controller that is arranged on anaerobe membrane reactor outside and aerobic biofilm reactor outside in this heating zone.
The present invention with the anaerobic-anoxic-oxic treatment process (referred to as A
2/ O method) is guiding theory, take the combination of biomembrance process and soil filtration equipment to remedy the defective of two kinds of methods, with the sludge reflux of biomembrance process to the nutrient of soil filtration equipment as plant-growth, utilize simultaneously the growth of plant to remove phosphorus in the mud, reach the purpose that phosphorus removes at all.In soil filtration equipment, fill simultaneously the special soil of human configuration, planting plants according to a certain percentage, and outside water distributor, lay the iron carbon filler, to improve the removal efficient of pollution substance, prevent the generation of latch up phenomenon.
Description of drawings
Fig. 1 is that the present invention is used to realize A
2The apparatus structure synoptic diagram of/O method.
Primary clustering nomenclature in the accompanying drawing:
1 anaerobe membrane reactor; 2 soil filtration equipment; 3 aerobic biofilm reactors; 4 agitators; 5 aeration plates; 6 water pumps; 7 temperature controllers; 8 warmings probe; 9 heating zones; 10 surface soil layers; 11 sandy soils; 12 filtering layers; 13 water guide pedospheres; 14 spinner-type flowmeters; 15 aerators; 16 mud discharging mouths; 17 aerobic biologic membranes; 18 anaerobe films.
Embodiment
The invention provides a kind of A that processes city domestic sewage or industrial sewage
2/ O biofilm reactor-soil filtration equipment and utilize this device to carry out the combination process of sewage disposal.
A provided by the invention
2The combination process that/O biofilm reactor-soil filtration equipment carries out sewage disposal is:
Use water pump sewage to be pumped into the water-in of anaerobe membrane reactor 1;
Wherein, anaerobe membrane reactor 1 bottom offers mud discharging mouth 16, and the top that the inside of anaerobe membrane reactor 1 is positioned at mud discharging mouth 16 is provided with agitator 4, and growth has anaerobe film 18 on the filler of the top of agitator 4;
The water outlet of anaerobe membrane reactor 1 is connected to the water distributing pipe of soil filtration equipment 2 water-ins by water pump 6;
Water distributing pipe is a perforation pvc pipe, and pipe external parcel one deck geotextile prevents from stopping up, and geotextile external parcel one deck iron carbon filler has little electrolytic functional;
Soil filtration equipment is buried soil filtration equipment, is followed successively by surface soil layer 10, sandy soils 11, filtering layer 12 and water guide layer 13 from top to bottom.Surface soil layer 10 is the soil of 0.2m, is used for serike; Sandy soils 11 thick 0.5m are comprised of sand and the mixing with soil of particle diameter 2mm-5mm, and according to consistency of soil, sand and mixing with soil volume ratio are 2: 1-3: 1; Filtering layer 12 is the non-woven fabrics of thickness 50mm; Water guide layer 13 thick 30mm lay gravel filling, and are minute upper and lower two-layer, middlely separate by non-woven fabrics, and the particle diameter of gravel filling is respectively 8mm-15mm and 15mm-30mm;
The plant of soil filtration equipment 2 surface soil layers 10 plantation is preferentially selected cyperus alternifolius and power flower again, and cyperus alternifolius, power flower plantation ratio is 1: 1 again, and this moment is best to the assimilation effect of ammonia nitrogen, has simultaneously landscape effect.
After precipitating through settling tank (known technology, not shown in the figures), the water outlet of soil filtration equipment 2 is connected to the water-in of aerobic biofilm reactor 3;
Wherein, these aerobic biofilm reactor 3 bottoms offer mud discharging mouth 16, and aerobic biofilm reactor 3 inside are positioned at mud discharging mouth 16 tops and are provided with aeration plate 5, and growth has aerobic biologic membrane 17 on the filler in the aerobe reactor 3;
Aerobic biofilm reactor 1 is respectively equipped with two water outlets, and wherein the first water outlet is used for water outlet, and the second water outlet water outlet mixes to the water distribution of soil filtration equipment with the water outlet of anaerobe membrane reactor 1;
Heating zone 9 and warming probe 8, connection is arranged on anaerobe membrane reactor 1 and aerobic biofilm reactor 3 inside respectively, and is connected with the temperature controller of outside;
Aerator 15 is the aeration plates 5 that are connected to aerobic biofilm reactor 3 by spinner-type flowmeter 14.
Be world control water inlet and water outlet, water-in and water outlet are equipped with electromagnetic valve (known technology, not shown in the figures) respectively.
A provided by the invention
2The method that/O method is disposed of sewage, its main flow process is as follows:
1) sewage enters in the anaerobe membrane reactor, utilize anaerobic environment that pre-treatment is carried out first in water inlet, sewage temperature is adjusted to 25-35 ℃, pH=7.5-8.5, carry out the first step anaerobic reaction by the stirring of the agitator in the anaerobe membrane reactor, hydraulic detention time is 24h.Under the prerequisite of anaerobic environment, the amphimicrobian zymophyte larger molecular organics of will easily degrading first is converted into micromolecular VFA (voltaile fatty acid), for the Microbial denitrogenation dephosphorization process in the subsequent technique provides carbon source, for plant-growth provides nutrient; PolyP bacteria absorbs the synthetic PHB of small organic molecule (a kind of carbon source class repertory that is present in the bacterial cytoplasm: poly-β-hydroxybutyric acid) be stored in the cell simultaneously, to gather simultaneously phosphorus and be hydrolyzed into orthophosphoric acid salt, be discharged in the sewage, phosphor in sewage concentration is raise;
The COD clearance of this step can reach more than 60%, makes the organism primary degradation, reduces the wastewater treatment difficulty, has improved denitrogenation dephosphorizing efficient in the certain situation of carbon-nitrogen ratio.
2) aerobic biofilm reactor mixes with the water outlet of anaerobe membrane reactor, make mixing water COD concentration be lower than 1000mg/L, ammonia nitrogen concentration is lower than 300mg/L, phosphorus concentration enters in the soil filtration equipment after being lower than 25mg/L, purifies water under the comprehensive action of soil-microorganism-botanical system.Under anoxia condition, denitrifying bacteria has absorbed small organic molecule provides carbon source, and nitrate radical is N by denitrification in the sewage
2, dissipation out; Anaerobic environment causes phosphate releasing simultaneously, in the process of growth of plant, absorb large amount of organic and nitrogen phosphorus as nutrient, utilize the growth of plant to remove phosphorus in the mud, solved the phosphorus accumulative total problem of mud in active sludge and the biofilm reactor, so organism and nitrogen, phosphorus concentration decrease all.
This step has solved the phosphorus accumulative total problem of mud in active sludge and the biofilm reactor, so organism and nitrogen, phosphorus concentration decrease all, and ammonia nitrogen removal frank can reach 75%-80%, and total tp removal rate is up to more than 90%.
3) water outlet of soil filtration equipment enters the aerobic biofilm reactor internal reaction through precipitation, is filled with filler or carbon fibre ecological grass in the aerobic biofilm reactor, builds aerobic environment; Hydraulic detention time is 8-12 hour.Organism remaining in the sewage is not only cleared up in this step reaction, and removes remaining ammonia nitrogen.This moment, the sewage internal carbon source consumed in first two steps in a large number, and polyP bacteria mainly obtains energy by the PHB that decomposes internal reservoir and breeds, and absorbed simultaneously to store phosphorus remaining in the sewage; Through precipitation, mud is discharged by mud discharging mouth, is back to use soil filtration equipment, as the fertilizer of plant-growth.
The water outlet ammonia nitrogen of this step, total phosphorus, COD removal effect are up to 90-95%, and running cost is low, and effluent quality is good, satisfy national sewage discharge requirement.
A of the present invention
2/ O method combination process is the combination of biological treatment and Ecological Disposal.Relatively single biofilm reactor, the present invention is stored in phosphorus in the mud, but has accomplished the removal of phosphorus in soil filtration equipment by plant, has solved biofilm reactor excess sludge phosphorus content superelevation, problem that working cost is high.Relatively conventional soil filtration equipment, it is little that the present invention has floor space, and sewage load is large, and treatment effect is good, the advantage that pollution substance in the sewage is more effectively utilized.Simultaneously the present invention can resist obstruction, slows down soil and oozes the unsettled phenomenon of method Nitrogen/Phosphorus Removal.
Below in conjunction with drawings and Examples the present invention is described in detail.
Waste water imports anaerobe membrane reactor 1 under the effect of water pump 6, turn on agitator 4 is carried out the fs anaerobic reaction simultaneously.Waste water switches off the pump 6 after filling with anaerobe membrane reactor 1.The 24h afterreaction finishes, and closes agitator 4, and precipitation for some time is carried out mud-water separation, and supernatant liquor is mixed with phegma, mixed solution is imported in the soil filtration equipment under the effect of water pump 6 react.
Be delivered in the aerobic biofilm reactor under the effect of water pump 6 through the water outlet after the soil filtration device processes, the 8-12h afterreaction finishes, and closes aerator 15, water outlet under the effect of magnetic valve.
Anaerobe membrane reactor 1 is regulated by temperature controller 7 with aerobic biofilm reactor 3 interior temperature, is higher than when temperature required the heat-processed of temperature controller 7 stopped heating bands 9 when warming probe 8 detects temperature.Excess sludge is discharged by mud discharging mouth 13.
The method implementation procedure of anaerobe film filler rapid biofilm:
At first that the bed mud of inoculation is laid in reactor bottom, tame according to concentration gradient with microbial culture medium, concentration gradient is by weight being bed mud: microbial culture medium=3: 1,2: 1,1: 1,1: 2,1: 3, continue to increase the ratio of microbial culture medium in the mixed solution, until last water inlet is microbial culture medium entirely, open the stirrer stirring and evenly mixing.Mixed solution changed once in two days, and this operation continues about fortnight, treats that the mud shape improves gradually, and color becomes chocolate by black gradually, has pure and fresh Earthy Taste, and settling property is good, showed that the culturing sludge stage finishes.
Wherein the mud of inoculation adopts the excess sludge of sewage work's secondary sedimentation basins; The microorganism culturing liquid formula is: glucose 1.4g/L, K
2HPO
419.15mg/L, KH
2PO
422.85mg/L, NH
4Cl1.15g/L, MgSO
40.15g/L and trace element.Its water-quality guideline is: pH:7.86; ρ (COD
Cr): 1000mg/L; ρ (NH
4 +-N): 300mg/L; ρ (PO
4 3--P): 25mg/L.
The method implementation procedure of aerobic biologic membrane filler rapid biofilm:
At first that the bed mud of inoculation is laid in reactor bottom, tame according to concentration gradient with microbial culture medium, concentration gradient is by weight being bed mud: microbial culture medium=3: 1,2: 1,1: 1,1: 2,1: 3, continue to increase the ratio of microbial culture medium in the mixed solution, until last water inlet is microbial culture medium entirely.Add aeration in the reactor, one week of operate continuously, treat that the mud shape improves gradually, color becomes tawny by black gradually, have pure and fresh Earthy Taste, settling property is good, and COD and ammonia nitrogen removal frank are stable to more than 85% respectively, the reactor stable water outlet shows that the culturing sludge stage finishes to carry out next operation.
After finishing, sludge acclimatization can carry out biofilm.Put filler into reactor, packed height is 0.7 with depth of water ratio, and the vexed 24h that exposes to the sun leaves standstill for some time, then discharge section suspended state microorganism and supernatant liquor, add again microbial culture medium, continue aeration, leave standstill, repeatedly several times, during the biofilm success, naked eyes can see and adhere to a certain amount of thread flco on the reactor wall that the surface of filler has all wrapped the lurid microbial film of one deck, and color is deepened gradually.Adopt little aeration in the aeration process, if excess aeration stirs, can make biology be difficult to be attached to filling surface.The biofilm process approximately continues a week.
Wherein the bed mud of inoculation adopts the excess sludge of sewage work's secondary sedimentation basins; Microbial culture medium is domestic sewage in rural areas by using, and the prescription of microbial culture medium is: glucose 0.42g/L, K
2HPO
43.83mg/L, KH
2PO
44.57mg/L, NH
4Cl95.35mg/L, MgSO
40.15g/L and trace element.Its water-quality guideline is: pH:7.86; ρ (COD
Cr): 300mg/L; ρ (NH
4 +-N): 25mg/L; ρ (PO
4 3--P): 5mg/L.
Claims (10)
1. method that biology-soil filtration is disposed of sewage, its key step comprises:
1) sewage carries out anaerobic reaction, under anaerobic environment, the larger molecular organics of easily degrading is converted into small molecules;
2) will through aerobic reaction be deployed in the soil after the water outlet of anaerobic reaction mixes, under the comprehensive action of soil-microorganism-plant, purify water, and under anoxia condition in the sewage nitrate radical be N by denitrification
2Dissipation out;
3) aerobic treatment is carried out in the water outlet in the soil, to clear up in the sewage remaining organism, remove remaining ammonia nitrogen rear portion and discharge, a part be deployed in the soil after the water outlet of anaerobic reaction mixes;
4) mud after the aerobic treatment returns and uses in the soil, as the fertilizer of plant-growth.
2. method according to claim 1, wherein, the temperature that sewage carries out anaerobic treatment is 25-35 ℃, pH=7.5-8.5.
3. device of realizing the described method of claim 1, it mainly is comprised of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor; Wherein:
The lower end is provided with agitator in the anaerobe membrane reactor, and the water outlet of this anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment water-in; The agitator top is provided with filler in the anaerobic biological reactor, and growth has the anaerobe film on the filler;
Soil filtration equipment is followed successively by surface soil layer, sandy soils, filtering layer and water guide layer from top to bottom; The surface soil layer is used for plant, and soil layer is comprised of sand and mixing with soil, and filtering layer is non-woven fabrics, the gravel filling of water guide layer for laying;
The water outlet of soil filtration equipment is connected to the water-in of aerobic biofilm reactor;
Aerobic biofilm reactor is provided with two water outlets, and the first water outlet is used for water outlet, and the second water outlet is connected with anaerobe membrane reactor water outlet;
The aerobic biofilm reactor interior lower end is provided with aeration plate, and the aeration plate top is provided with filler, and growth has aerobic biologic membrane on the filler.
4. device according to claim 3, wherein, all establish the bottom of anaerobe membrane reactor and aerobic biofilm reactor is mud discharging mouth.
5. device according to claim 3, wherein, the aeration plate of aerobic biofilm reactor connects aerator by a under meter.
6. device according to claim 3, the water outlet of anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment by water pump.
7. according to claim 3 or 6 described devices, wherein, water distributing pipe is the perforation pvc pipe, and pipe external parcel one deck geotextile prevents from stopping up, and geotextile external parcel one deck has the iron carbon filler of little electrolytic functional.
8. device according to claim 3, wherein, water-in and the water outlet of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor are equipped with electromagnetic valve respectively.
9. device according to claim 3, wherein, the water outlet of soil filtration equipment is connected to the water-in of aerobic biofilm reactor through settling tank.
10. device according to claim 3, wherein, the anaerobe membrane reactor is inner and aerobic biofilm reactor inside all is equipped with the heating zone and warming is popped one's head in, and is connected with warming and connects respectively the temperature controller that is arranged on anaerobe membrane reactor outside and aerobic biofilm reactor outside in this heating zone.
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| CN104150699A (en) * | 2014-07-25 | 2014-11-19 | 中国环境科学研究院 | Water recycling treatment device and method in four-section upward soil infiltration system |
| CN104193078A (en) * | 2014-07-25 | 2014-12-10 | 中国环境科学研究院 | Device and method for treating phosphorus-containing organic wastewater by using A/O soil percolation systems |
| CN104193084A (en) * | 2014-07-25 | 2014-12-10 | 中国环境科学研究院 | Sewage treatment device of multistage inflow vertical flow soil infiltration system and method for treating sewage by using device |
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| CN105692905A (en) * | 2015-09-29 | 2016-06-22 | 河南工业大学 | Land treatment method and device for ecotype landscape water body |
| CN107777775A (en) * | 2017-12-12 | 2018-03-09 | 辽宁工业大学 | It is a kind of that there is the sewage disposal system for denitrogenating phosphorus function |
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| CN105692905B (en) * | 2015-09-29 | 2019-01-04 | 河南工业大学 | A kind of land disposal method and device of ecotype landscape water body |
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| CN107777775A (en) * | 2017-12-12 | 2018-03-09 | 辽宁工业大学 | It is a kind of that there is the sewage disposal system for denitrogenating phosphorus function |
| CN107777775B (en) * | 2017-12-12 | 2021-03-23 | 辽宁工业大学 | Sewage treatment system with nitrogen and phosphorus removal function |
| CN111153507A (en) * | 2019-12-26 | 2020-05-15 | 中国科学院合肥物质科学研究院 | Activated sludge zero-emission greenbelt type treatment tank and sewage treatment system |
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