CN108423798A - The processing method and processing unit of sanitary wastewater based on GY-2 type water treatment fillers - Google Patents
The processing method and processing unit of sanitary wastewater based on GY-2 type water treatment fillers Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The method for the sanitary wastewater processing based on 2 type water treatment fillers of GY that the invention discloses a kind of, step are：The filling of 2 type water treatment fillers of GY is formed into filter bed in the reactor；By sanitary wastewater above filter bed water distribution, so that waste water is passed through filter bed；2 type water treatment fillers of GY include material of main part and auxiliary material；Material of main part decomposed under anaerobic environment is obtained by the tunning and carbon raw material of organic waste；Auxiliary material by agriculture and forestry organic waste material it is fermented after be prepared；Material of main part and the mass ratio of auxiliary material are 30~40 ︰ 100.The present processes can efficient process organic wastewater, to realize different waste water targeting processing, have be not easy to plug, service life is long, the advantages such as at low cost.The present invention also provides the processing unit of organic wastewater, including reactor, water distributor, force ventilation pipe, filter bed, treatment effeciency is high.
Description
Technical field
The present invention relates to sanitary wastewater processing technology fields, it particularly relates to which a kind of being based on GY-2 type water treatment fillers
Rural domestic waste processing method and processing unit.
Background technology
Domestic sewage in rural areas has：The features such as wide, dispersion, source is more, increases soon, collects difficulty, and handling rate is low.At present
Main treatment technology can be classified as two classes, i.e. nature processing system and biological treatment system.Natural processing system mainly utilizes
The self-purification capacity of nature handles sanitary sewage, such as Artificial Wetland Techniques, soil filtration purification, oxidation pond.
Biological treatment system be mainly using anaerobism or aerobic microbiological by water organic matter and other polluters carry out digestion point
The method of solution mainly has AO techniques, SBR techniques, MBR techniques, bio-trickling technique, activated sludge process etc..Or these methods
Processing is not thorough, it is difficult to qualified discharge；It is complicated for operation, need the personnel of profession to carry out maintenance operation；Operating cost compared with
Height is not suitable for the processing of domestic sewage in rural areas.
Invention content
For above-mentioned technical problem in the related technology, the present invention proposes a kind of life based on GY-2 type water treatment fillers
The processing method of waste water, can efficient process sanitary wastewater, to realize different waste water targeting processing, have be not easy to plug,
Service life is long, the advantages such as at low cost.The present invention also provides the processing unit of sanitary wastewater, treatment effeciency is high.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A method of the sanitary wastewater processing based on GY-2 type water treatment fillers includes the following steps：
(1) filling of GY-2 type water treatment fillers is formed into filter bed in the reactor；
(2) waste water is made to pass through the filter bed from water distribution above the filter bed sanitary wastewater；Complete the sanitary wastewater
Processing；
The GY-2 types water treatment filler includes material of main part and auxiliary material；The material of main part is by organic waste
Tunning and carbon raw material is decomposed under anaerobic environment obtains；The auxiliary material by agriculture and forestry organic waste material it is fermented after be prepared into
It arrives；The material of main part and the mass ratio of auxiliary material are 30~40 ︰ 100.
Above-mentioned method, it is preferred that the material of main part is prepared using following methods：
S1-1, organic waste progress anaerobic fermentation is obtained into tunning；
S1-2, carbon raw material is taken to be mixed to get the mixture that the content of organic matter is 7%~15% with the tunning；
S1-3, by the mixture, anaerobism is decomposed under isoperibol.
Above-mentioned method, it is preferred that in the S1-1 steps, in the anaerobic fermentation process, moisture content be 45%~
60%, compost height is 1~3 meter, and the anaerobic fermentation time is 10~20 days.
Above-mentioned method, it is preferred that in the S1-3 steps, the decomposed detailed process of the anaerobism is：Mixture is existed
Decomposed 50~100 days of constant temperature under anaerobic environment, a height of 3~5 meters of heap, temperature >=28 DEG C；In the constant temperature digest process, every 2~
Turning in 10 days is primary, and it is 50%~70% to keep moisture content.
Above-mentioned method, it is preferred that the carbon raw material is cinder, coal ash, organoclay, one kind in mineralized waste or more
Kind；The organic waste is one or more in fallen leaves and deadwood.
Above-mentioned method, it is preferred that the grain size of the carbon raw material is 0.42~30mm, and the content of organic matter is less than 15%,
Specific gravity control is 1.2~1.5g/cm3；The grain size of the organic waste is 1.4~4mm.
Above-mentioned method, it is preferred that the auxiliary material is prepared using following methods：
S2-1, by agriculture and forestry organic waste material compost to temperature be 50~70 DEG C；
Continue compost after S2-2, turning, until when compost material is brown and temperature is room temperature, stops fermentation, obtain heap
Fertile product；
S2-3, by compost product cultivation in cultivation storehouse.
Above-mentioned method, it is preferred that in the S2-1 steps, the moisture content of the compost is 30%~35%, and heap is a height of
1.5~3 meters.
Above-mentioned method, it is preferred that in the S2-3 steps, intermittent water inflow, continuous aeration are used in the course of cultivating the microorganism
Method cultivation, dissolved oxygen concentration is 2~4mg/L in control cultivation storehouse.
Above-mentioned method, it is preferred that in the processing procedure of the waste water, be inserted into force ventilation pipe and filled out in sanitary wastewater processing
It is aerated in material.Further, it is preferred that force ventilation pipe is aerated using intermittent aeration method, and the ventilation process is adopted
It is handled with intermittent aeration, was divulged information 1 hour at interval of 4~6 hours, ventilation quantity is 10 ︰, 1~20 ︰ 1.
The present invention also provides a kind of devices for the above method, including reactor, water distributor, force ventilation pipe, filter
Bed；The water distributor is set to the reactor head, and the filter bed is set to the inside reactor, the force ventilation pipe
Upper end be connected with air blower, lower end extends in filter bed.The filter bed is filled by GY-2 type water treatment fillers.
Above-mentioned device, it is preferred that described device further includes metalling and collector pipe, and the metalling is set to described anti-
It answers device bottom, the collector pipe to be set in the metalling, the hole for collecting waste water is equipped on the collector pipe；
Or, described device further includes metalling and sieve, the metalling is set to the reactor bottom, the sieve
It is set to the reactor water outlet, 3 ‰~5 ‰ gradient is set as by the metalling bottom, water is made to flow out.
Above-mentioned device, it is preferred that described device further includes gravity-flow ventilation pipe, the force ventilation pipe and gravity-flow ventilation pipe
It is vertically distributed in the inside reactor indirectly；Gravity-flow ventilation pipe upper end is higher by filter bed surface, and lower end is by filter bed and prolongs
Extend to metalling.
Above-mentioned device, it is preferred that the height of the filter bed is 1.5m~2m；Force ventilation pipe lower end is away from metalling
30cm~50cm；The upper end of the gravity-flow ventilation pipe is higher by filter bed surface 20cm~30cm.
Compared with the prior art, the advantages of the present invention are as follows：
(1) raw material of the processing method of a kind of sanitary wastewater provided by the invention, GY-2 type water treatment fillers is all from
Waste, feeding facilitate, simply, it can be achieved that the target of the treatment of wastes with processes of wastes against one another, is environmentally friendly product, and at low cost.
(2) processing method of a kind of sanitary wastewater provided by the invention, the organic, ammonia nitrogen waste water with efficiently removal high concentration
The effect of the pollutants such as middle COD, ammonia nitrogen.Filler is not easy to plug simultaneously, and service life, can after arrival service life at 1 year or more
Make filler regeneration by technical finesse, but the regenerative process period is longer (45 days or so).
(3) processing method of a kind of sanitary wastewater provided by the invention chooses main body according to the water quality characteristic of actual waste water
The proportioning of material and auxiliary material prepares series of high efficiency water treatment filler, to realize different waste water targeting processing.
(4) the present invention provides a kind of devices for sanitary wastewater processing, easy for installation using integrated design, apply
The work period is short；There is good removal effect to every pollutant in sanitary sewage；It is not easy to plug, service life is long；It uses
It is convenient, it is particularly suitable for distributing, small-scale sewage processing；Ecological beauty.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure chart of the processing unit of organic wastewater in embodiment 2.In Fig. 1,1：Reactor, 2：Water distributor, 3：Machine
Tool ventilation duct, 4：Filter bed, 5：Metalling, 6：Collector pipe, 8：Gravity-flow ventilation pipe.
Fig. 2 is the structure chart of the processing unit of organic wastewater in embodiment 3.In Fig. 2,1：Reactor, 2：Water distributor, 3：Machine
Tool ventilation duct, 4：Filter bed, 5：Metalling, 7：Sieve, 8：Gravity-flow ventilation pipe.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained belong to what the present invention protected
Range.
The pollution problem of material breeding wastewater employed in following embodiment is caused to the ecological environment on periphery extremely dislikes
Bad influence.
Embodiment 1
A kind of GY-2 types water treatment filler, including body material and auxiliary material.
The preparation method of wherein material of main part is：
(1) it is that 1.4~4mm obtains organic waste powder to dry the organic wastes such as husk, branch, be crushed to grain size
The moisture content at end, organic waste powder remains 50% or so.
(2) by organic waste powder compost, a height of 1.2m of heap carries out anaerobic fermentation and obtains anaerobic fermentation product in 15 days.
(3) it is 0.42~30mm, carbon containing original the carbon raw materials such as cinder, coal ash, organoclay, mineralized waste to be crushed to grain size
The content of organic matter of material is less than 15%, and specific gravity control is 1.2~1.5g/cm3.Carbon raw material is uniformly mixed through at step (2)
In anaerobic fermentation product after reason, so that the content of organic matter in material of main part is maintained at 10% or so and obtain mixture.
(4) mixture is subjected to anaerobism constant temperature decomposed 90 days under not less than 28 DEG C environment of temperature, heap is 3 meters high, is kept for the summer
It turn within 2~5 days rake moisturizing it is primary, 5~10 days winters turn over rake moisturizing it is primary, keep moisture content obtain main body material 50%~70%
Material.
The preparation method of wherein auxiliary material is：
(1) by broken mixing of agriculture and forestry organic waste materials such as husk, discarded bamboo material, stalks, heap compost, a height of 1.8 meters of heap, width are built
More than 2 meters, the moisture content of compost is 30%~35%.
(2) it in temperature after fermentation starts when reaching 65 DEG C, overturns once, until material connects in dark brown and temperature
When near ambient temperature, stops fermentation and obtain compost product.
(3) compost product is put into cultivation in simulation cultivation storehouse to continue to be aerated using intermittent water inflow, control dissolved oxygen is dense
4mg/L is spent, until passing through microscopic to a fairly large number of living microorganism.
COD in the sanitary wastewater handled needed for detectionCrA concentration of 280mg/L.According to effluent quality index, by following
Calculation formula determines the proportioning of material of main part and auxiliary material；
In formula (1)：P indicates the proportioning of major ingredient and auxiliary material；C into indicate influent CODCrConcentration, g/L；C goes out to indicate water outlet
CODCrConcentration, g/L；N is filter bed quantity；θ is empirical value, takes 6.
It is 36mg/L that COD is discharged in this example, and filter bed series is 1 grade, then P values are 0.38, the i.e. proportioning of major ingredient and auxiliary material
For 38 ︰ 100.
Embodiment 2
A kind of processing unit for organic wastewater, referring to Fig. 1, including reactor 1, water distributor 2, multiple force ventilation pipes
3, multiple gravity-flow ventilation pipes 8, filter bed 4 and metalling 5.
Filter bed 4 is formed in reactor 1 by the filling of GY-1 type water treatment fillers, and 4 bottom of filter bed is provided with metalling 5, more
A gravity-flow ventilation pipe 8 and multiple force ventilation pipes 3 are inserted perpendicularly into filter bed 4；Water distributor 2 is set to 1 top of reactor.Further
, the area and thickness of filter bed 4 are determined according to day inflow, and the area of filter bed 4 is 8~10 times of day inflow, 4 face of filter bed
Product is 400~500m2, determines that the thickness of filter bed 4 is 1.5m~2m.
Further, the setting of water distributor 2 is at the top of reactor 1, waste water by water distributor 21 uppermost spray of reactor extremely
In reactor 1.Preferably, the outlet of water distributor 2 ensures the uniformity of water distribution using spiral nozzle or crisscross aperture.
Further, multiple force ventilation pipes 3 and multiple gravity-flow ventilation pipes 8 are vertically distributed in inside reactor 1 indirectly；Machine
Be divided into 2m between tool ventilation duct 3, between gravity-flow ventilation pipe 8 between be divided into 2m, force ventilation pipe 3 and gravity-flow ventilation pipe 8 it
Between between be divided into 1m.Wherein, the upper end of force ventilation pipe 3 is connected with air blower, and lower end extends in filter bed 4；Force ventilation pipe 3
There is 50cm in lower end away from metalling 5, convenient for being supplied to 4 inside of filter bed；3 lower end of force ventilation pipe is apart from excessively high then filter bed 4 of metalling 5
Internal gas distribution is uneven, lower layer anaerobic state；Distance is excessively shallow, and pending waste water is easily directly entered by force ventilation pipe 3
Metalling 5.It is further preferred that force ventilation pipe 3 carries out surrounding trepanning at interval of 50~60cm accelerates microorganism inside filter bed
Metabolism, improve treatment of Organic Wastewater effect.
Further, processing unit further includes collector pipe 6, and collector pipe 6 is set to 5 bottom of metalling, is set on collector pipe 6
Be useful for collecting the hole of waste water, between transverse holes between be divided into 40cm~80cm, through filter bed 4, treated that water collects in catchments
In pipe 6, finally water is expelled to outside filter bed 4 by a supervisor.
Further, 8 upper end of gravity-flow ventilation pipe is higher by 4 20~30cm of surface of filter bed, and lower end is by filter bed 4 and extends to broken
Rock layers 5.The effect of gravity-flow ventilation pipe 8 is to reduce 4 internal negative pressure of filter bed, keeps water outlet unobstructed, and bottom may be fermented generation
Biogas discharge.
Embodiment 3
A kind of processing unit for organic wastewater, referring to Fig. 2, including reactor 1, water distributor 2, multiple force ventilation pipes
3, multiple gravity-flow ventilation pipes 8, filter bed 4 and metalling 5.
Filter bed 4 is formed in reactor 1 by the filling of GY-1 type water treatment fillers, and 4 bottom of filter bed is provided with metalling 5, from
Right ventilation duct 8 and force ventilation pipe 3 are inserted perpendicularly into filter bed 4；Water distributor 2 is set to 1 top of reactor.Further, filter bed 4
Area and thickness determine that the area of filter bed 4 is day 8~10 times of inflow, and 4 area of filter bed is 400 according to day inflow
~500m2, determine that the thickness of filter bed 4 is 1.5m~2m.
Further, the setting of water distributor 2 is at the top of reactor 1, waste water by water distributor 21 uppermost spray of reactor extremely
In reactor 1.Preferably, the outlet of water distributor 2 ensures the uniformity of water distribution using spiral nozzle or crisscross aperture.
Further, multiple force ventilation pipes 3 and multiple gravity-flow ventilation pipes 8 are vertically distributed in inside reactor 1 indirectly；Machine
Be divided into 2m between tool ventilation duct 3, between gravity-flow ventilation pipe 8 between be divided into 2m, force ventilation pipe 3 and gravity-flow ventilation pipe 8 it
Between between be divided into 1m.Wherein, the upper end of force ventilation pipe 3 is connected with air blower, and lower end extends in filter bed 4；Force ventilation pipe 3
There is 50cm in lower end away from metalling 5, convenient for being supplied to 4 inside of filter bed；3 lower end of force ventilation pipe is apart from excessively high then filter bed 4 of metalling 5
Internal gas distribution is uneven, lower layer anaerobic state；Distance is excessively shallow, and pending waste water is easily directly entered by force ventilation pipe 3
Metalling 5.It is further preferred that force ventilation pipe 3 carries out surrounding trepanning at interval of 50~60cm accelerates 4 inside microorganism of filter bed
Metabolism, improve treatment of Organic Wastewater effect.
Further, processing unit further includes sieve 7, and metalling 5 is set to 1 bottom of reactor, passes through 1 bottom of reactor
It is set as 3 ‰~5 ‰ gradient, the water in metalling 5 is made to flow out.Sieve 7 is set to 1 water outlet of reactor, prevents rubble etc.
Outflow.
Further, 8 upper end of gravity-flow ventilation pipe is higher by 4 20~30cm of surface of filter bed, and lower end is by filter bed 4 and extends to broken
Rock layers 5.The effect of gravity-flow ventilation pipe 8 is to reduce 4 internal negative pressure of filter bed, keeps water outlet unobstructed, and bottom may be fermented generation
Biogas discharge.
Embodiment 4
A kind of application of the processing unit of the sanitary wastewater of embodiment 2 in handling sanitary wastewater, treatment scale 5t/d,
Its application process is：
(1) water treatment filler is filled：GY-2 type water treatment fillers, which are filled into reactor, forms filter bed.Microorganism filter bed
Area is 3~4 times of day inflow, and by taking the inflow of 5t/d as an example, then filter bed area is 15-20m2, the height of microbe stuffing
Degree is 1.5m.
(2) water body detects：Jiangxi Shangrao County domestic sewage in rural areas is taken, after septic tank is handled, in the morning 9:00 inspection
The COD for surveying waste water stoste is 285mg/L, ammonia-nitrogen content 38mg/L, pH 7.68, suspended matter 101mg/L.
(3) water process：Waste water is entered into water distributor by elevator pump, is flowed into from the aperture for being uniformly distributed in reactor head
Filter bed reaches collection water layer, by adsorbing and giving birth to during by filler using its own gravity of water through the filler in filter bed
Change effect achievees the purpose that organic pollution in degrading waste water, and the water for reaching collection water layer is emitted into collecting-tank by collection conduit
In.Process cycle is 6-8 hours.It is handled using intermittent aeration in water treatment procedure, was divulged information 1 hour at interval of 4-6 hours, ventilation
Amount is arranged according to steam-water ratio, usually 10 ︰ 1.Waste water is entered into water distributor 2 by elevator pump, is pushed up from reactor 1 is uniformly distributed in
The aperture in portion flows into filter bed 4, metalling 5 is reached through the filler in filter bed 4 using its own gravity of water, in by filter bed 4
Organic pollution in degrading waste water is achieved the purpose that by absorption and biochemical action during GY-2 types water treatment filler, is reached broken
The water of rock layers 5 is emitted into clear water reserviors by collector pipe 6.Process cycle is 7 hours (process cycle is 6~8 hours).At water
It is handled, was divulged information 1 hour at interval of (4~6 hours) 5 hours, ventilation quantity is according to steam-water ratio using intermittent aeration during reason
Setting, usually 10 ︰ 1.
Detect the water quality situation of clear water reserviors：Water outlet pH is 7.46, ammonia-nitrogen content 0.341mg/L, and COD is
32mg/L；Suspended matter is 11mg/L.
After simultaneously using the processing unit of the organic wastewater of embodiment 2 to treatment of Organic Wastewater 1 year, the chemistry of water outlet needs
Oxygen amount, ammonia-nitrogen content and total phosphorus content can also reach emission request.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of method of the sanitary wastewater processing based on GY-2 type water treatment fillers, which is characterized in that include the following steps：
（1）The filling of GY-2 type water treatment fillers is formed into filter bed in the reactor；
（2）By sanitary wastewater from water distribution above the filter bed, waste water is made to pass through the filter bed；Complete the place of the sanitary wastewater
Reason；
The GY-2 types water treatment filler includes material of main part and auxiliary material；The material of main part by organic waste fermentation
Product and carbon raw material is decomposed under anaerobic environment obtains；The auxiliary material by agriculture and forestry organic waste material it is fermented after be prepared；
The material of main part and the mass ratio of auxiliary material are 30~40 ︰ 100.
2. according to the method described in claim 1, it is characterized in that, the material of main part is prepared using following methods：
S1-1, organic waste progress anaerobic fermentation is obtained into tunning；
S1-2, carbon raw material is taken to be mixed to get the mixture that the content of organic matter is 7%~15% with the tunning；
S1-3, by the mixture, anaerobism is decomposed under isoperibol.
3. according to the method described in claim 2, it is characterized in that, in the S1-1 steps, in the anaerobic fermentation process, contain
Water rate is 45%~60%, and compost height is 1~3 meter, and the anaerobic fermentation time is 10~20 days；
And/or in the S1-3 steps, the decomposed detailed process of the anaerobism is：By mixture, constant temperature is rotten under anaerobic environment
Ripe 50~100 days, a height of 3~5 meters of heap, temperature >=28 DEG C；In the constant temperature digest process, every turning in 2~10 days is primary, keeps
Moisture content is 50%~70%.
4. according to the method described in claim 1, it is characterized in that, the auxiliary material is prepared using following methods：
S2-1, by agriculture and forestry organic waste material compost to temperature be 50~70 DEG C；
Continue compost after S2-2, turning, until when compost material is brown and temperature is room temperature, stops fermentation, obtain compost production
Object；
S2-3, by compost product cultivation in cultivation storehouse.
5. according to the method described in claim 4, it is characterized in that, in the S2-1 steps, the moisture content of the compost is 30%
~35%, a height of 1.5~3 meters of heap；
And/or in the S2-3 steps, intermittent water inflow, the method cultivation of continuous aeration, control training are used in the course of cultivating the microorganism
Dissolved oxygen concentration is 2~4mg/L in bacterium storehouse.
6. the method according to any one of claims 1 to 5, it is characterized in that, in the processing procedure of the waste water, being inserted into
Force ventilation pipe is handled in filler in sanitary wastewater and is aerated, the ventilation process using intermittent aeration processing, at interval of 4~
It divulges information 1 hour within 6 hours, ventilation quantity is 10 ︰, 1~20 ︰ 1.
7. a kind of device for any one of claim 1 to 6 the method, which is characterized in that including reactor（1）, cloth
Water pipe（2）, force ventilation pipe（3）, filter bed（4）；The water distributor（2）It is set to the reactor（1）Top, the filter bed
（4）It is set to the reactor（1）Inside, the force ventilation pipe（3）Upper end be connected with air blower, lower end extends to filter bed
（4）In.
8. device according to claim 7, which is characterized in that described device further includes metalling（5）And collector pipe（6）,
The metalling（5）It is set to the reactor（1）Bottom, the collector pipe（6）It is set to the metalling（5）In, institute
State collector pipe（6）It is equipped with the hole for collecting waste water；
Or, described device further includes metalling（5）And sieve（7）, the metalling（5）It is set to the reactor（1）Bottom,
The sieve is set to the reactor（1）Water outlet passes through the metalling（5）Bottom is set as 3 ‰~5 ‰ gradient,
Water is set to flow out.
9. device according to claim 8, which is characterized in that described device further includes gravity-flow ventilation pipe（8）, the machinery
Ventilation duct（3）With gravity-flow ventilation pipe（8）It is vertically distributed in the reactor indirectly（1）It is internal；The gravity-flow ventilation pipe（8）Upper end
It is higher by filter bed（4）Surface, lower end pass through filter bed（4）And extend to metalling（5）.
10. device according to claim 9, which is characterized in that the filter bed（4）Height be 1.5m~2m；The machine
Tool ventilation duct（3）Lower end is away from metalling（5）30cm~50cm；The gravity-flow ventilation pipe（8）Upper end be higher by filter bed（4）Surface
20cm~30cm.
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