CN103030247B - 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 PDF

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CN103030247B
CN103030247B CN201110303151.0A CN201110303151A CN103030247B CN 103030247 B CN103030247 B CN 103030247B CN 201110303151 A CN201110303151 A CN 201110303151A CN 103030247 B CN103030247 B CN 103030247B
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soil
water
reactor
water outlet
aerobic
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CN103030247A (en
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席北斗
王雷
张列宇
夏训峰
牛永超
熊瑛
王丽君
赵颖
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Chinese Research Academy of Environmental Sciences
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Chinese Research Academy of Environmental Sciences
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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

The method and apparatus that a kind of biology-soil filtration is disposed of sewage
Technical field
The invention belongs to sewage disposal technology, relate to particularly the method for a kind of biology-soil filtration processing city domestic sewage or industrial sewage.
The invention still further relates to a kind of for realizing the device of aforesaid method.
Background technology
Biomembrance process is to grow up on the basis of activated sludge process, be a kind of by microorganism be membranaceous be attached to carrier surface form.By contacting with sewage, the dirty pollutant in water of microorganism panning on filler is 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 producing still cannot be processed, and due to the limitation of biological process, the phosphorus majority in sewage is stored in mud in microorganism, constantly under inrichment, in mud, total phosphorus concentration constantly raises, and excess sludge is difficult to process.
Soil filtration equipment is a kind of natural, ecological treatment process, using energy-conservation, resource-saving as guiding theory, giving through engineering approaches, the small-scale Novel sewage purification techniques of practical creation one out, is the composite purifying process that sanitary sewage is processed in the acting in conjunction of comprehensive utilization soil-filler-microorganism-plant.Existing soil filtration occupation area of equipment is large, and in sewage treatment process, soil capillarity finestructure is easily blocked, causes the stagnation of system operation.
Summary of the invention
A kind of method that the object of the present invention is to provide biology-soil filtration to dispose of sewage.
Another object 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 degraded is converted into small molecules;
2) by being deployed in soil after mixing with the water outlet of anaerobic reaction through aerobic, under the comprehensive action of soil-microorganism-plant, purify water, and under anoxia condition in sewage nitrate radical by denitrification be N2 dissipation out;
3) aerobic treatment is carried out in the water outlet in soil, to clear up organism remaining in sewage, removes remaining ammonia nitrogen rear portion and discharges, and a part is deployed in soil after mixing with the water outlet of anaerobic reaction;
4) mud after aerobic treatment returns and uses in 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 realizing aforesaid method provided by the invention, it is mainly made up of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor; Wherein:
In anaerobe membrane reactor, lower end is provided with agitator, and the water outlet of this anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment water-in; In anaerobic biological reactor, agitator top is provided with filler, and on filler, growth has anaerobe film;
Soil filtration equipment is followed successively by surface soil layer, sandy soils, filtering layer and water guide layer from top to bottom; Surface soil layer is for plant, and soil layer is made up of sand and mixing with soil, and filtering layer is non-woven fabrics, and water guide layer is the gravel filling of 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 for water outlet, and the second water outlet is connected with anaerobe membrane reactor water outlet;
Aerobic biofilm reactor interior lower end is provided with aeration plate, and aeration plate top is provided with filler, and on filler, growth has aerobic biologic membrane.
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 is connected to the water distributing pipe of soil filtration equipment by water pump.
Described device, wherein, water distributing pipe is perforation pvc pipe, and pipe external parcel one deck geotextile prevents obstruction, and geotextile external parcel one deck has the iron carbon filler of micro-electrolytic functional.
Described device, wherein, water-in and the water outlet of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor are provided 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, anaerobe membrane reactor is inner and aerobic biofilm reactor inside is all provided with heating zone and warming is popped one's head in, and this heating zone is connected respectively with warming probe the temperature controller that is arranged on anaerobe membrane reactor outside and aerobic biofilm reactor outside.
The present invention with anaerobic-anoxic-oxic treatment process (referred to as A 2/ O method) be guiding theory, take the combination of biomembrance process and soil filtration equipment to make up the defect of two kinds of methods, nutrient using the sludge reflux of biomembrance process to soil filtration equipment as plant-growth, utilize the growth of plant to remove the phosphorus in mud simultaneously, reach the object that phosphorus removes at all.In soil filtration equipment, fill the special soil of human configuration simultaneously, planting plants according to a certain percentage, and lay iron carbon filler outward at water distributor, to improve the removal efficiency of pollution substance, prevent the generation of latch up phenomenon.
Accompanying drawing explanation
Fig. 1 is that the present invention is for realizing A 2the apparatus structure schematic diagram of/O method.
Primary clustering nomenclature in 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 warming probes; 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 on the filler of the top of agitator 4, growth has anaerobe film 18;
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 micro-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.The soil that surface soil layer 10 is 0.2m, for serike; The thick 0.5m of sandy soils 11, is made up 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; The thick 30mm of water guide layer 13, lays gravel filling, point upper and lower two-layer, middlely separates by non-woven fabrics, and the particle diameter of gravel filling is respectively 8mm-15mm and 15mm-30mm;
The plant that soil filtration equipment 2 surface soil layers 10 are planted is preferentially selected cyperus alternifolius and power flower again, and cyperus alternifolius, power flower plantation ratio is 1: 1 again, now best to the assimilation effect of ammonia nitrogen, has landscape effect simultaneously.
The water outlet of soil filtration equipment 2 is connected to the water-in of aerobic biofilm reactor 3 after precipitating through settling tank (known technology, not shown in the figures);
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 on the filler in aerobe reactor 3, growth has aerobic biologic membrane 17;
Aerobic biofilm reactor 1 is respectively equipped with two water outlets, and wherein the first water outlet is for water outlet, and the second water outlet water outlet mixes with the water outlet of anaerobe membrane reactor 1 to the water distribution of soil filtration equipment;
Heating zone 9 and warming probe 8, connect and be arranged on anaerobe membrane reactor 1 and aerobic biofilm reactor 3 inside respectively, and be connected with outside temperature controller;
Aerator 15 is the aeration plates 5 that are connected to aerobic biofilm reactor 3 by spinner-type flowmeter 14.
For world control water inlet and water outlet, water-in and water outlet are provided 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 anaerobe membrane reactor, utilize anaerobic environment first to carry out pre-treatment to water inlet, sewage temperature is adjusted to 25-35 ℃, pH=7.5-8.5, stirred and carried out the first step anaerobic reaction by the agitator in anaerobe membrane reactor, hydraulic detention time is 24h.Under the prerequisite of anaerobic environment, the amphimicrobian zymophyte larger molecular organics of first easily degrading is converted into micromolecular VFA (voltaile fatty acid), for the Microbial denitrogenation dephosphorization process in subsequent technique provides carbon source, for plant-growth provides nutrient; The synthetic PHB (a kind of carbon source class repertory being present in bacterial cytoplasm: poly-β-hydroxybutyric acid) of the small organic molecule of polyP bacteria absorption is simultaneously stored in cell, to gather phosphorus simultaneously and be hydrolyzed into orthophosphoric acid salt, be discharged in sewage, phosphor in sewage concentration is raise;
The COD clearance of this step can reach more than 60%, makes organism primary degradation, reduces wastewater treatment difficulty, has improved denitrogenation dephosphorizing efficiency in the situation that carbon-nitrogen ratio is certain.
2) aerobic biofilm reactor mixes with the water outlet of anaerobe membrane reactor, make mixing water COD concentration lower than 1000mg/L, ammonia nitrogen concentration is lower than 300mg/L, phosphorus concentration enters in soil filtration equipment after lower than 25mg/L, under the comprehensive action of soil-microorganism-botanical system, purifies water.Under anoxia condition, denitrifying bacteria has absorbed small organic molecule provides carbon source, and in sewage, nitrate radical is N by denitrification 2, dissipation out; Anaerobic environment causes the release of phosphorus 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 the phosphorus in mud, the phosphorus accumulative total problem that has solved mud in active sludge and biofilm reactor, therefore organism and nitrogen, phosphorus concentration all significantly reduce.
This step has solved the phosphorus accumulative total problem of mud in active sludge and biofilm reactor, and therefore organism and nitrogen, phosphorus concentration all significantly reduce, 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 reaction in aerobic biofilm reactor through precipitation, is filled with filler or carbon fibre ecological grass in aerobic biofilm reactor, builds aerobic environment; Hydraulic detention time is 8-12 hour.This single step reaction is not only cleared up organism remaining in sewage, and removes remaining ammonia nitrogen.Now sewage internal carbon source consumes in a large number in first two steps, and polyP bacteria is mainly bred by the PHB acquisition energy that decomposes internal reservoir, absorbs simultaneously and stores phosphorus remaining in 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, meets 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 mud, but in soil filtration equipment, has accomplished the removal of phosphorus 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 dirty pollutant in water is more effectively utilized.The present invention simultaneously 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, and turn on agitator 4, carries out first stage anaerobic reaction simultaneously.Waste water switches off the pump 6 after filling anaerobe membrane reactor 1.After 24h, reaction finishes, and closes agitator 4, and precipitation for some time is carried out mud-water separation, and supernatant liquor is mixed with phegma, and mixed solution is imported in soil filtration equipment and reacted under the effect of water pump 6.
Water outlet after soil filtration device processes is delivered in aerobic biofilm reactor under the effect of water pump 6, and after 8-12h, reaction finishes, and closes aerator 15, water outlet under the effect of magnetic valve.
Anaerobe membrane reactor 1 regulates by temperature controller 7 with the interior temperature of aerobic biofilm reactor 3, and when warming probe 8 detects that temperature is when temperature required, temperature controller 7 stops the heat-processed of heating zone 9.Excess sludge is discharged by mud discharging mouth 13.
The method implementation procedure of anaerobe film filler rapid biofilm:
First by laid in reactor bottom the bed mud of inoculation, tame according to concentration gradient with microbial culture medium, concentration gradient is bed mud by weight: microbial culture medium=3: 1,2: 1,1: 1,1: 2,1: 3, continue to increase the ratio of microbial culture medium in mixed solution, until last water inlet is microbial culture medium entirely, open stirrer stirring and evenly mixing.Mixed solution changes once for two days, and this operation continues about fortnight, treats that mud shape improves gradually, and color becomes chocolate by black gradually, has pure and fresh Earthy Taste, and settling property is good, shows that the culturing sludge stage finishes.
Wherein the mud of inoculation adopts the excess sludge of sewage work's secondary sedimentation basins; 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:
First by laid in reactor bottom the bed mud of inoculation, tame according to concentration gradient with microbial culture medium, concentration gradient is bed mud by weight: microbial culture medium=3: 1,2: 1,1: 1,1: 2,1: 3, continue to increase the ratio of microbial culture medium in mixed solution, until last water inlet is microbial culture medium entirely.Add aeration in reactor, one week of operate continuously, treat that 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 stablized respectively to more than 85%, reactor stable water outlet, shows that the culturing sludge stage finishes to carry out next operation.
After completing, 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, when biofilm success, naked eyes can see on reactor wall and adhere to a certain amount of thread flco, and the surface of filler has all wrapped the lurid microbial film of one deck, and color is deepened gradually.In aeration process, adopt micro-aeration, if excess aeration stirs, can make biology be difficult to be attached to filling surface.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 formula 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. the 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 degraded is converted into small molecules;
2) after mixing with the water outlet of anaerobic reaction through aerobic reaction, be deployed in soil, carry out micro-electrolysis reaction with the iron carbon filler of water distributing pipe external parcel, under the comprehensive action of soil-microorganism-plant, purify water, and under anoxia condition in sewage nitrate radical be N by denitrification 2dissipation out;
3) aerobic treatment is carried out in the water outlet in soil, to clear up organism remaining in sewage, removes remaining ammonia nitrogen rear portion and discharges, and a part is deployed in soil after mixing with the water outlet of anaerobic reaction;
4) mud after aerobic treatment returns and uses in soil, as the fertilizer of plant-growth;
The method that biology-soil filtration is disposed of sewage is to carry out in the device being made up of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor; Wherein:
In anaerobe membrane reactor, lower end is provided with agitator, the water outlet of this anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment water-in, water distributing pipe external parcel one deck geotextile prevents from stopping up, and geotextile external parcel one deck has the iron carbon filler of micro-electrolytic functional; In anaerobic biological reactor, agitator top is provided with filler, and on filler, growth has anaerobe film;
Soil filtration equipment is followed successively by surface soil layer, sandy soils, filtering layer and water guide layer from top to bottom; Surface soil layer is for plant, and soil layer is made up of sand and mixing with soil, and filtering layer is non-woven fabrics, and water guide layer is the gravel filling of 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 for water outlet, and the second water outlet is connected with anaerobe membrane reactor water outlet;
Aerobic biofilm reactor interior lower end is provided with aeration plate, and aeration plate top is provided with filler, and on filler, growth has aerobic biologic membrane.
2. method according to claim 1, wherein, the temperature that sewage carries out anaerobic treatment is 25-35 ℃, pH=7.5-8.5.
3. a device of realizing method described in claim 1, it is mainly made up of anaerobe membrane reactor, soil filtration equipment and aerobic biofilm reactor; Wherein:
In anaerobe membrane reactor, lower end is provided with agitator, the water outlet of this anaerobe membrane reactor is connected to the water distributing pipe of soil filtration equipment water-in, water distributing pipe external parcel one deck geotextile prevents from stopping up, and geotextile external parcel one deck has the iron carbon filler of micro-electrolytic functional; In anaerobic biological reactor, agitator top is provided with filler, and on filler, growth has anaerobe film;
Soil filtration equipment is followed successively by surface soil layer, sandy soils, filtering layer and water guide layer from top to bottom; Surface soil layer is for plant, and soil layer is made up of sand and mixing with soil, and filtering layer is non-woven fabrics, and water guide layer is the gravel filling of 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 for water outlet, and the second water outlet is connected with anaerobe membrane reactor water outlet;
Aerobic biofilm reactor interior lower end is provided with aeration plate, and aeration plate top is provided with filler, and on filler, growth has aerobic biologic membrane.
4. device according to claim 3, wherein, the bottom of anaerobe membrane reactor and aerobic biofilm reactor is equipped with 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 the device described in claim 3 or 6, wherein, water distributing pipe is perforation pvc pipe.
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 provided 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, anaerobe membrane reactor is inner and aerobic biofilm reactor inside is all provided with heating zone and warming is popped one's head in, and this heating zone is connected respectively with warming probe the temperature controller that is arranged on anaerobe membrane reactor outside and aerobic biofilm reactor outside.
CN201110303151.0A 2011-10-09 2011-10-09 Method for treating sewage by organism-soil infiltration and device for realizing method Expired - Fee Related CN103030247B (en)

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