CN104986863B - Rural domestic sewage manual wetland system and purification method - Google Patents
Rural domestic sewage manual wetland system and purification method Download PDFInfo
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- CN104986863B CN104986863B CN201510390125.4A CN201510390125A CN104986863B CN 104986863 B CN104986863 B CN 104986863B CN 201510390125 A CN201510390125 A CN 201510390125A CN 104986863 B CN104986863 B CN 104986863B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention provides a rural domestic sewage manual wetland system and a purification method. The system comprises at least one wetland bed formed with red bricks and straw as filler. The grain sizes of the filler gradually decrease from bottom to top. According to the method, domestic sewage is purified through the wetland beds formed with the red bricks and the straw as the filler. The grain sizes of the filler gradually decrease from bottom to top. Domestic swage is distributed on the upper portions of the wetland beds, and purified water is obtained at the bottoms of the wetland beds. By means of the system and the method, rural domestic sewage can be purified, rural abandoned straw and construction waste are adopted as wetland matrix, the price is low, but the sewage purification effect is good.
Description
Technical field
The present invention relates to a kind of sewage disposal technology, more particularly to a kind of artificial swamp for rural domestic sewage treatment
System and purification method.
Background technology
Water resource is more in short supply in our countries, and per capita water resource is only the 1/4 of world occupancy volume per person.According to Chinese environmental
Situation publication shows that domestic water environment pollution is more serious, and particularly river basin has been polluted.With quality of life
Improve, the pollution of life source has accounted for the major part of gross contamination, and the trend for increasing year by year is presented.Rural population is accounted in China
According to very big proportion, current China's rural population is lived than relatively decentralized, and the size of population is more, almost without any Domestic sewage collecting
And treatment measures, domestic sewage in rural areas almost directly discharges, and causes the severe contamination of water body.Annual China rural area life according to statistics
More than 80 hundred million tons of sewage yield living.The most of life in the countryside level of relative of China fall behind, and are adapted to process the dirt of domestic sewage in rural areas
Water treatment technology is few, find and research and develop be adapted to the technique that rural area dispersion life processes be in the weight for process at present life in the countryside it
Weight.
Except sanitary sewage, the life in the countryside garbage yield such as current farm building disposed waste and field straw is big
And tupe fall behind, also directly to abandon, arbitrarily stack based on, almost account for the 80% of yield.According to the statistics whole nation
The annual yield of building waste is up to 400,000,000 tons；The total yield of national straw in 2005 reaches 84183.12 ten thousand tons.Garbage is not
Work as process, not only the look of a village village looks in rural area are impacted, and mainly air, soil and water body are polluted, seriously
Threaten the physical and mental health of resident.How by life in the countryside garbage, such as domestic sewage in rural areas, discarded building waste, field straw
Stalk carries out the important content that harmless treatment recycling is current new countryside construction and beautiful rural construction.
At present for the treatment technology of sanitary sewage has a lot, mainly including traditional activated sludge process, A/O methods, oxidation ditch
Method etc..But for China rural area, inhabitants live's distribution and economic condition, the artificial swamp place more traditional than other
Reason method has more advantages.Artificial swamp has that low investment, operation and administration fee are low, the water yield and change of water quality is adapted to
The features such as ability is strong, it is similar with natural bioremediation, makes full use of substrate-microorganism and plant complex ecosystem to realize to sewage
Purification.
Artificial swamp has various, how to play sewage disposal effect of artificial swamp, reaches processing requirement, selects wetland class
Type, in the design of artificial swamp, substrate, plant and water are the principal elements of design.But substrate and plant are selected at present, and
Determine that the system of water flow mode is perfect not enough.For the Wetland Design research for processing China's distributing rural domestic sewage treatment
Also in starting-up process.
Artificial swamp is that, by the ground similar with marshland for manually building and controlling operation, sewage, sludge are had into control
The wetland manually built to Jing of dosing on, sewage with sludge during flowing in a certain direction, mainly using soil, base
Matter, plant, the physics of microorganism, chemistry, biological triple synergism, a kind of technology that sewage, sludge are processed.Its work
Include absorption, delay, filtration, oxidoreduction, precipitation, microorganism decomposition, conversion, plant masking, residue accumulated, steaming with mechanism
Rise the effect of moisture and Nutrient Absorption and all kinds of animals.
Artificial swamp compared with traditional wastewater treatment plant with small investment, the low clear superiority of operating cost, on rural area ground
Area, because population density is relatively small, compared with traditional sewage treatment plant, general investment can save 1/3-1/2 to artificial swamp.
In processing procedure, artificial swamp substantially by the way of flow by gravity, basic Non-energy-consumption, operating cost in processing procedure
It is low, in the relatively low rural area of population density, build artificial swamp more more economical than traditional wastewater treatment plant.
China is few using the artificial swamp for country sewage, the Wetland Substrate or price of current document report compared with
It is expensive, such as activated carbon, gravel, quartz sand etc., or the effect of purification sewage is not fine, such as river sand etc., all not to the utmost such as people
Meaning.Thus how to select substrate so as to it is not only cheap suitable for domestic sewage in rural areas purification, and can also realize very well
Wastewater purifying efficiency, be one of industry technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of domestic sewage in rural areas artificial wet land system and purification method, it can be to agriculture
Village's sanitary sewage is purified.
The domestic sewage in rural areas artificial wet land system of the present invention, the wetland bed employing Rhizoma Begoniae Willsonii wetland bed including at least
Load to be formed as implant with straw, wherein, from bottom to top, the particle diameter of implant is tapered into.
Wherein, it is described wetland bed to include from bottom to top：
One supporting layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 3-5cm；
One second layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 1-3cm；
One third layer, thickness is 70cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 0.5-1cm；
One upper strata, thickness is 20cm, is made up of with the mixture filling of straw clay Rhizoma Begoniae Willsonii, and particle diameter is respectively less than 0.5cm, glues
Reddle brick：The weight ratio of straw is 10:1.
Wherein, described artificial wet land system, can include it is plural wetland bed, it is each wetland bed to be arranged on institute parallel
In stating artificial wet land system.
Wherein, water distributor is set in the wetland bed top, by sewage transport is to the wetland bed top and discharges；Institute
Wetland bed downstream connection header tank is stated, for collecting the purified water Jing after wetland bed purification.
Wherein, the water distributor can be arranged at wetland bed top 20cm, and water distributor is provided with Valve controlling current and opens
Close, water distributor has some branches, each branch be provided with controlled valve with individually adjust each branch's water distribution uninterrupted and
Switch；It is described wetland bed, it is arranged in a casing, the wetland bed box house can be provided with liquidometer, in wetland bed box body
Liquid level be apart from wetland bed bottom 40cm-85cm.
Wherein, the header tank is disposed proximate to wetland bed wall by wall, or using a casing be divided into it is wetland bed with
Header tank, header tank, it is wetland bed close to sidewall bottom be provided with several holes, it is connection header tank, wetland bed.
Wherein, discharge casing is set in the header tank downstream, for collecting the dirt discharged after artificial wet land system
Water.
Wherein, the water distributor upstream connects distribution reservoir, and pre-treatment defecator is provided with the distribution reservoir.
The pre-treatment defecator can adopt stainless steel filtering net film, and screen membrane bottom to distribution reservoir bottom can be arranged
Baffle plate, the screen membrane and baffle plate separate the distribution reservoir；Immersible pump, immersible pump downstream connection liquid flow are set in distribution reservoir
Gauge, effusion meter downstream connection water distributor.
Wherein, the hydraulic surface loading of the artificial wet land system is 0.2-0.8m3/(m2.d), the water distribution-dry cycle that falls is 7
My god, wet dry time ratio is 3:4.
Wherein, it is described it is wetland bed on plant wetland plant, the wetland plant is using cold-resistant, easily growth, anti-pollution characteristic
High plant.
The domestic sewage in rural areas purification method of the present invention, is purified with wetland bed to sanitary sewage, wherein, the wetland
Bed loads to be formed using Rhizoma Begoniae Willsonii and straw as implant, and from bottom to top the particle diameter of implant is tapered into, in wetland bed top
Sanitary sewage is laid, in wetland bed bottom purified water is obtained.
Wherein, sanitary sewage cloth be put into it is wetland bed before filtered and water distribution, and after Jing water distributors be transported to wetland
Bed top lays；In sanitary sewage Jing after wetland bed purification, purified water is made from wetland bed bottom percolation to close to wetland bed collection
In water tank.
The present invention has advantages below and positive effect：
The substrate that the artificial wet land system of the present invention is adopted is mainly the discarded straw or building waste in rural area, not only
Sewage can be purified, it is also possible to which countryside wastes are turned waste into wealth.In addition in the present invention, the water plant for being grown on this substrate can
To be aquatic vegetable, such as Herba Apii, water spinach etc., purification not only can be played to sewage, and peasant can be produced
Economic worth.
The present invention can effectively process domestic sewage in rural areas, especially for small-sized household domestic sewage in rural areas, technique letter
It is single, build convenient, it is suitable for rural area dispersed wastewater and processes, treatment in situ can be carried out to domestic sewage in rural areas, also have
Environmental ecological benefit.
Rural area is made full use of to discard Rhizoma Begoniae Willsonii, waste straw is Wetland Substrate, by purification of the system to domestic sewage in rural areas,
Not only by purifying domestic sewage, and countryside wastes are carried out into recycling, be changed into Artificial Soil and (refer to top 80-100cm's
Substrate will be changed into Artificial Soil, innoxious, the minimizing Treatment and recovery Utilizing question of effectively solving solid waste from village), reach
Waste recycling is carried out to garbage, the purpose for turning waste into wealth.
For existing artificial swamp, the Wetland Substrate of the present invention adopts the discarded straw or building rubbish in rural area
Rubbish, it is cheap, but wastewater purifying efficiency is good.
Beneficial effects of the present invention can be confirmed from application example in detail below：
Concrete application example one：
Jixian Tianjin rural domestic waste, CODcr 150.1mg/L, NH in sewage3‐N 20.9mg/L,TN35.8mg/
L, TP 1.9mg/L, processed by the invention, hydraulic load is 0.2m3/(m2.D), water outlet CODcr is less than 50mg/L, NH3- N is less than
3mg/L, TN are less than 15mg/L, and TP is less than 0.5mg/L.2 months stable, plant grew wells of system operation, stable effluent quality,
System water outlet reaches《Urban wastewater treatment firm sewage drainage standard (GB18918-2002)》One-level B.
Instantiation two：
Blue or green certain rural domestic waste (breeding wastewater containing dispersion) in Tianjin west, CODcr 398.6mg/L, NH in sewage3‐N
68.7mg/L, TN 88.6mg/L, TP 9.5mg/L, processed by the invention, hydraulic load is 0.2m3/(m2.D), water outlet CODcr
Less than 50mg/L, NH3- N is less than 3mg/L, and TN is less than 15mg/L, and TP is less than 0.5mg/L.System operation stable, plant life in 2 months
Long good, stable effluent quality, system water outlet reaches《Urban wastewater treatment firm sewage drainage standard (GB18918-2002)》One
Level B.
Description of the drawings
Fig. 1 is the structural representation of the vertical flow constructed wetland device of the present invention；
Fig. 2 is the structural representation of the artificial wet land system of the present invention.
Specific embodiment
The present invention's discards domestic sewage in rural areas artificial wet land system of the Rhizoma Begoniae Willsonii-straw as substrate with rural area, including at least
One vertical flow constructed wetland device, the device can realize sewage purification, constitute a kind of domestic sewage purification device.Including two
In the case of vertical flow constructed wetland device more than individual, each device can be made to arrange parallel in systems.As shown in figure 1, institute
Vertical flow constructed wetland device is stated including a casing, in the casing, from the bottom up, including supporting layer 1, the second layer 2, third layer
3 and upper strata 4, each layer discards Rhizoma Begoniae Willsonii using the farm building of different-grain diameter size and rural area waste straw is loaded.Its
In, from bottom to top, the particle diameter of implant is tapered into.
Each layer that from below to up order is laid, one embodiment of its paving mode is as follows：
The supporting layer 1, thickness is 5cm, is made up of for the clay Rhizoma Begoniae Willsonii filling between 3-5cm particle diameter；
The second layer 2, thickness is 5cm, is made up of for the clay Rhizoma Begoniae Willsonii filling between 1-3cm particle diameter；
The third layer 3, thickness is 70cm, is made up of for the clay Rhizoma Begoniae Willsonii filling between 0.5-1cm particle diameter；
The upper strata 4, thickness is 20cm, is made up of with the mixture filling of straw clay Rhizoma Begoniae Willsonii, and particle diameter is respectively less than
0.5cm, clay Rhizoma Begoniae Willsonii：The weight ratio of straw is 10:1.
Wetland plant 5 can be planted on the vertical flow constructed wetland device, the wetland plant 5 is using cold-resistant, Yi Sheng
The high plant of long, anti-pollution characteristic, such as Herba Apii, water spinach, Rhizoma Iridis Tectori, Rhizoma Acori Graminei, Herba Scirpi Tabernaemontani, the planting density of the wetland plant 5
For 15-30 strains/m2。
As shown in Fig. 2 the present invention's discards domestic sewage in rural areas artificial swamp system of the Rhizoma Begoniae Willsonii-straw as substrate with rural area
System, according to the flow direction (with arrows in figure) of water, including the distribution reservoir 10 being sequentially connected in series, wetland bed 20, header tank 30 and row
Water tank 40.Used as one embodiment, the size of distribution reservoir 10 is 1.5m × 1m × 1m (length × width × height), the size of wetland case 20
Size be 2m × 1m × 1.2m, the size of header tank 30 be 0.2m × 1m × 1.2m, the size of discharge casing 40 be 1.5m ×
1m×1m。
The distribution reservoir 10, is applied not only to process the allotment of domestic sewage in rural areas, and wherein leading portion is furnished with life in the countryside
The pre-treatment defecator 101 of raw sewage, can filter to sewage.The defecator 101 will using stainless steel filtering net film 103
Distribution reservoir 10 separates, and is filtered in sewage by screen membrane.Screen membrane porosity be 30 mesh, screen membrane distance from bottom casing bottom
Portion is highly 40cm.Screen membrane bottom is baffle plate 102.The purpose being arranged such is：Screen membrane can be with filter sewage, will be larger
Suspended particulate substance is filtered；The baffle plate 102 of bottom is act as larger particles float or sludge settling in the side of baffle plate 102
Afterwards, can conveniently concentrate cleaning and not affect the opposite side water distribution of baffle plate 102.
Described wetland bed 20 are constituted using the vertical flow constructed wetland device of Fig. 1, for purifying sewage.It is described wetland bed
20, its top arranges water distributor 503, preferably in the setting water distributor 503 at the wetland bed 20 surface 20cm of upper strata 4,
The water distributor 503, the sewage for taking from the distribution reservoir 10 is transported to wetland bed 20 top and is discharged into wetland bed
20 upper stratas 4.Described wetland bed 20, its box house is provided with liquidometer, and preferred three-hand type liquidometer 504, the liquidometer is controllable
The liquid level in wetland bed 20 casing is made, liquid level is preferably controlled at wetland bed 20 bottom 40cm-85cm.
Header tank 30 is connected to wetland bed 20 downstream, for collecting the purified water Jing after wetland bed 20 purifications,.Header tank 30
Connection with wetland bed 20, can be using pipeline or alternate manner, it is preferred to use following manner：Header tank 30 and wetland bed 20 wall
Be disposed proximate to by wall, or can using casing be divided into wetland bed 20 with header tank 30, header tank 30, wetland bed 20
Casing close to sidewall bottom be provided with several holes, such as 4 holes connect two tanks, and water can be via the hole from wetland
20 casings of bed are infiltrated in header tank 30.
Discharge casing 40 is arranged on the downstream of header tank 30, is connected using pipeline with header tank 30, and switch is provided with pipeline
Valve, to control discharge.Discharge casing 40 is a part for artificial wet land system, is mainly used in collecting all through artificial swamp
The purified water discharged after system purification；The row for reading sewage after artificial swamp is primarily served the purpose of in process of experimental
Water concentration after water volume and measure purification.
The artificial wet land system of the present invention includes water distribution system, including immersible pump 501, effusion meter 502 and water distributor 503.
Immersible pump 501 (model QDX3-20-0.55) is positioned in distribution reservoir 10.(the amount of 501 downstream connection fluid flowmeter of immersible pump 502
Journey scope 10L/h-80L/h).Fluid flowmeter 502 is preferably provided at outside the casing of distribution reservoir 10.Using immersible pump 501 and stream
The co- controlling flooding time of gauge 502 and uninterrupted.The downstream connection water distributor 503 of effusion meter 502, preferred porous water distributor
503, deliver water to wetland bed 20 top and discharge.Water distributor 503 has some branches, such as four branches, is provided with switch
Valve, can individually adjust each branch's cloth discharge and size.Preferably, the long 2m of each branch of water distributor 503, pipe is provided with
Some apertures of a diameter of 2mm, each pitch of holes is 50mm.Water distributor 503 is arranged on apart from wetland bed 20 surface of upper strata 4
At about 20cm.
It is convenient in order to test sampling, it is preferred that on wetland bed 20 casing, from bottom to top thief hole is set every 20cm
505, rational height is respectively 20cm, 40cm, 60cm, 80cm, 100cm.Pipeline is provided with thief hole 505, pipeline is to casing
Inner horizontal extends 0.5m, and above the pipeline of the extension ommatidium is arranged, and is entered in the middle of pipeline with Informal water.Pipeline top adds
Cover seal.
In order to better control over current, water distribution time, layout are such as controlled, further preferably configuration is as follows.Distribution reservoir 10 is arrived
Wetland bed 20 connecting pipe is provided with the control water flow switch of valve 601, and four valves are respectively equipped with four water distributors 503
Branch's flow velocity size, start and stop of 602 control water distribution pipes etc., the draining of header tank 30 can the control inflow discharge casing of Jing valves 603
40.Each casing is equipped with sewage, mud discharging pipeline and has Valve controlling：At the pre-treatment defecator 101 of distribution reservoir 10
Discharge before reason is controlled by valve 605；Discharge after the process of 10 pre-treatment defecator of distribution reservoir 101 is controlled by valve 606；It is wet
Groundbed 20, the discharge of header tank 30 are controlled respectively by valve 607, valve 608；The discharge of discharge casing 40 is by valve 609 or valve
604 controls.
Preferably, the hydraulic surface loading of the artificial wet land system (passes through in per the per square meter of surface area unit interval
Sewage volume number) it is 0.2-0.8m3/(m2.d), the water distribution-dry cycle that falls is 7 days, and wet dry time ratio is 3:4.The artificial swamp
The hydraulic surface loading of system can be controlled by fluid flowmeter 502, immersible pump 501 and electronic box；The water distribution time and fall it is dry
Time can manually control.
Sewage disposal is carried out using the system of the present invention, its flow process is as follows.With reference to refering to Fig. 2, arrow therein shows
Water (flow) direction.Sewage is filtered using the pre-treatment defecator 101, it is dirty to life in the countryside in the distribution reservoir 10
Water is allocated, and (as needed water quality requirement or technological parameter requirement, carry out into water adjusting in terms of hydraulic load, pollutional load etc.
With).The immersible pump 501 extracts in the sewage after allotment, Jing after effusion meter 502, is transported to water distributor 503.The water distributor
Sewage output is arrived wetland bed 20 tops by 503.Sewage sequentially passes through under gravity, from top to bottom wetland bed 20 each layer and enters
Row purification.Purified water after purification from wetland bed 20 casing and header tank 30 close to the hole of sidewall bottom infiltrate into header tank 30
It is interior.Purified water Jing pipelines in header tank 30 are stored to discharge casing 40.
Embodiment described above, the simply present invention more preferably specific embodiment, those skilled in the art is at this
The usual variations and alternatives carried out in the range of inventive technique scheme all should be comprising within the scope of the present invention.
Claims (12)
1. a kind of domestic sewage in rural areas artificial wet land system, it is characterised in that, the wetland bed employing wetland bed including at least
Rhizoma Begoniae Willsonii and straw load to be formed as implant, wherein, from bottom to top, the particle diameter of implant is tapered into, described wetland bed
Top arranges water distributor, by sewage transport is to the wetland bed top and discharges；
It is described wetland bed to include from bottom to top：
One supporting layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 3-5cm；
One second layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 1-3cm；
One third layer, thickness is 70cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 0.5-1cm；
One upper strata, thickness is 20cm, is made up of with the mixture filling of straw clay Rhizoma Begoniae Willsonii, and particle diameter is respectively less than 0.5cm, and clay is red
Brick：The weight ratio of straw is 10:1.
2. artificial wet land system as claimed in claim 1, it is characterised in that each wetland bed including plural wetland bed
In being arranged on the artificial wet land system parallel.
3. artificial wet land system as claimed in claim 1, it is characterised in that in the wetland bed downstream connection header tank, uses
In purified water of the collection Jing after wetland bed purification.
4. artificial wet land system as claimed in claim 3, it is characterised in that the water distributor is arranged on wetland bed top 20cm
Place, water distributor is provided with Valve controlling water flow switch, and water distributor has some branches, and each branch is provided with controlled valve with list
Solely adjust each branch's water distribution uninterrupted and switch；It is described wetland bed, it is arranged in a casing, the wetland bed box house
Liquidometer is provided with, the liquid level in wetland bed box body is apart from wetland bed bottom 40cm-85cm.
5. artificial wet land system as claimed in claim 3, it is characterised in that the header tank and wetland bed wall are by wall close to setting
Put, or wetland bed and header tank be divided into using a casing, if header tank, it is wetland bed close to sidewall bottom be provided with
A dry hole, it is connection header tank, wetland bed.
6. artificial wet land system as claimed in claim 3, it is characterised in that arrange discharge casing in the header tank downstream, uses
In the purified water that collection is discharged after artificial wet land system purification.
7. artificial wet land system as claimed in claim 3, it is characterised in that the water distributor upstream connects distribution reservoir, described
Pre-treatment defecator is provided with distribution reservoir.
8. artificial wet land system as claimed in claim 7, it is characterised in that the pre-treatment defecator is filtered using rustless steel
Nethike embrane, screen membrane bottom to distribution reservoir bottom arranges baffle plate, and the screen membrane and baffle plate separate the distribution reservoir；In distribution reservoir
Immersible pump, immersible pump downstream connection fluid flowmeter, effusion meter downstream connection water distributor are set.
9. artificial wet land system as claimed in claim 8, it is characterised in that the hydraulic surface loading of the artificial wet land system
For 0.2-0.8m3/(m2.d), the water distribution-dry cycle that falls is 7 days, and wet dry time ratio is 3:4.
10. artificial wet land system as claimed in claim 1, it is characterised in that it is described it is wetland bed on plant wetland plant, institute
Wetland plant is stated for Herba Apii, water spinach or Herba Scirpi Tabernaemontani.
11. a kind of domestic sewage in rural areas purification methods, it is characterised in that sanitary sewage is purified with wetland bed, wherein, institute
State wetland bed employing Rhizoma Begoniae Willsonii and straw loads to be formed as implant, from bottom to top the particle diameter of implant is tapered into, in wetland
Bed top lays sanitary sewage, and in wetland bed bottom purified water is obtained；It is described wetland bed to include from bottom to top：
One supporting layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 3-5cm；
One second layer, thickness is 5cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 1-3cm；
One third layer, thickness is 70cm, is made up of clay Rhizoma Begoniae Willsonii filling of the particle diameter for 0.5-1cm；
One upper strata, thickness is 20cm, is made up of with the mixture filling of straw clay Rhizoma Begoniae Willsonii, and particle diameter is respectively less than 0.5cm, and clay is red
Brick：The weight ratio of straw is 10:1.
12. purification methods as claimed in claim 11, it is characterised in that sanitary sewage cloth be put into it is wetland bed before carried out
Filter and water distribution, and after Jing water distributors be transported to wetland bed top and lay；In sanitary sewage Jing after wetland bed purification, make purified water from
Wetland bed bottom percolation is to close in wetland bed header tank.
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| CN105858896B (en) * | 2016-04-15 | 2018-12-25 | 农业部环境保护科研监测所 | A kind of strengthened denitrification domestic sewage in rural areas artificial wet land system and purification method |
| CN108734620A (en) * | 2018-05-29 | 2018-11-02 | 大连海事大学 | A kind of size of population investigation method based on concentration of wastewater monitoring |
| CN109970205A (en) * | 2019-03-15 | 2019-07-05 | 山东省环科院环境工程有限公司 | A kind of the ventilation anti-seepage drowned flow artificial wet land and its operation method of efficient denitrification |
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| US7510649B1 (en) * | 2004-01-09 | 2009-03-31 | Ronald Lavigne | Top loading vertical flow submerged bed wastewater treatment system |
| CN100569670C (en) * | 2007-05-14 | 2009-12-16 | 华南农业大学 | The method for the treatment of sewage by composite vertical down flow artificial wet field and treatment system thereof |
| US8252182B1 (en) * | 2008-09-11 | 2012-08-28 | University Of Central Florida Research Foundation, Inc. | Subsurface upflow wetland system for nutrient and pathogen removal in wastewater treatment systems |
| CN202214249U (en) * | 2011-06-03 | 2012-05-09 | 中国海洋大学 | Vertical underflow artificial wetland for treating polluted river water |
| CN204281497U (en) * | 2014-09-22 | 2015-04-22 | 河北科技大学 | A kind of rural sewage courtyard type Water warfare integrated apparatus |
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