CN110526402A - A kind of array soil sewage disposal system - Google Patents
A kind of array soil sewage disposal system Download PDFInfo
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- CN110526402A CN110526402A CN201910961685.9A CN201910961685A CN110526402A CN 110526402 A CN110526402 A CN 110526402A CN 201910961685 A CN201910961685 A CN 201910961685A CN 110526402 A CN110526402 A CN 110526402A
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- Prior art keywords
- layer
- gravel
- water flowing
- layers
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002689 soil Substances 0.000 title claims abstract description 67
- 239000010865 sewage Substances 0.000 title claims abstract description 59
- 239000010410 layer Substances 0.000 claims abstract description 228
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000002344 surface layer Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 30
- 150000001875 compounds Chemical class 0.000 claims abstract description 22
- 230000035699 permeability Effects 0.000 claims abstract description 22
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 23
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims description 11
- 229910021536 Zeolite Inorganic materials 0.000 claims description 9
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 9
- 239000010457 zeolite Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000005342 ion exchange Methods 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 241000108664 Nitrobacteria Species 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- UCTAMTCGWMMARC-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.N.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.N.[NH6+3] UCTAMTCGWMMARC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- -1 on the one hand Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- RECVMTHOQWMYFX-UHFFFAOYSA-N oxygen(1+) dihydride Chemical group [OH2+] RECVMTHOQWMYFX-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
Abstract
The present invention relates to array soil sewage disposal system, the surface layer set including successively layer, the first gravel layer, compound sewage process layer, the second gravel layer and impervious barrier；The compound sewage process layer includes at least two layers of the water flowing layer and at least one layer of soil horizon that layer is set, and alternate intervals are arranged at least one layer of soil horizon between at least two layers of water flowing layer, and between at least one layer of soil horizon and at least two layers of water flowing layer；It further include water inlet pipe and permeability cell, the water inlet of the water inlet pipe is protruded into the first gravel layer by the side of the first gravel layer, and the side of second gravel layer is equipped with water outlet；The permeability cell is protruded by surface layer and is sequentially passed through surface layer, the first gravel layer and compound sewage process layer.Array soil sewage disposal system of the invention has the advantages that the efficient removal to ammonia nitrogen can be achieved.
Description
Technical field
The present invention relates to soil sewage disposal technology, in particular to a kind of array soil sewage disposal system.
Background technique
Microbial denitrogenation process in sewage treatment needs aerobic nitrification-anaerobic denitrifying process.And traditional soil is dirty
Water treatment system is difficult to realize anoxic-anaerobic condition simultaneously, therefore Nitrogen removal effect is poor.
Summary of the invention
The technical problems to be solved by the present invention are: a kind of array soil sewage disposal system is provided, it can be in the soil
Anoxic-anaerobic processes are realized simultaneously.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of array soil sewage disposal system, the surface layer set including successively layer, the first gravel layer, compound sewage processing
The material of layer, the second gravel layer and impervious barrier, the surface layer is soil, and it is 20- that the material of first gravel layer, which is partial size,
The gravel of 30mm, the material of second gravel layer are the gravel that partial size is 38-42mm；
The compound sewage process layer includes at least two layers of the water flowing layer and at least one layer of soil horizon that layer is set, and at least one
The soil horizon of layer is handed between at least one layer of soil horizon and at least two layers of water flowing layer between at least two layers of water flowing layer
For interval setting；
It further include water inlet pipe and permeability cell, the water inlet of the water inlet pipe protrudes into the first gravel by the side of the first gravel layer
In layer, the side of second gravel layer is equipped with water outlet；The permeability cell is protruded by surface layer and is sequentially passed through surface layer, the first gravel
Rock layers and compound sewage process layer.
The beneficial effects of the present invention are:
Above-mentioned water inlet pipe, permeability cell are set, so that array soil sewage disposal system realizes that top water inlet and bottom go out
Water, by the longitudinal layered surface layer for being laid with different infiltration coefficients, the first gravel layer, compound sewage process layer, the second gravel layer and
Impervious barrier makes to be formed alternately existing unsaturated zone inside array soil sewage disposal system；The above-mentioned compound dirt of the application
Water process layer, soil horizon is slow infiltration layer, then the above-mentioned water flowing layer of matching design, while permeability cell runs through water flowing layer, passes through permeability cell
Gas exchanges can be carried out in water flowing layer.At runtime, sewage first passes through surface layer to the array soil sewage disposal system of the application,
Pollutant realizes drop by processes such as retention, absorption, ion exchange, redox and microbial degradations in topsoil
Solution, while being anaerobic zone inside surface layer, hardly degraded organic substance is by anaerobic degradation；Sewage enters in compound sewage process layer later
Water flowing layer, on the one hand, water flowing layer is by absorption and the fixed a part of ammonia nitrogen of ion exchange, and on the other hand, water is quick in water flowing layer
Next layer is flowed into, unsaturation band is formed, the air in permeability cell can spread into water flowing layer, and water flowing layer is made to form anoxic zone, ammonia nitrogen
Nitrate and nitrite are converted by nitrobacteria, then sewage is into next layer of soil horizon, nitrate and nitrous acid
After salt is converted into nitrogen, nitrogen enters water flowing layer and is excluded by snorkel；At least one layer of soil horizon and at least two layers logical
The arrangement of water layer alternate multilayer, replaces anoxic-anaerobic processes repeatedly, and then realizes the efficient removal to ammonia nitrogen.
Detailed description of the invention
Fig. 1 is the side sectional view of the array soil sewage disposal system of the embodiment of the present invention.
Label declaration:
1, surface layer；2, the first gravel layer；3, compound sewage process layer；31, water flowing layer；32, soil horizon；4, the second gravel
Layer；5, impervious barrier；6, water inlet pipe；7, permeability cell；8, water outlet.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The most critical design of the present invention is: design surface layer that successively layer is set, the first gravel layer, compound sewage process layer,
Second gravel layer and impervious barrier so that sewage can realize anoxic-anaerobic processes simultaneously in the soil, and then realize the height to ammonia nitrogen
Effect removal.
Please refer to Fig. 1, array soil sewage disposal system provided by the invention, the surface layer 1, first set including successively layer
Gravel layer 2, compound sewage process layer 3, the second gravel layer 4 and impervious barrier 5, the material on the surface layer 1 are soil, first gravel
The material of rock layers 2 is the gravel that partial size is 20-30mm, and the material of second gravel layer 4 is the gravel that partial size is 38-42mm；
The compound sewage process layer 3 includes at least two layers of the water flowing layer 31 and at least one layer of soil horizon 32 that layer is set,
At least one layer of soil horizon 32 between at least two layers of water flowing layer 31, and at least one layer of soil horizon 32 at least two layers
Alternate intervals are arranged between water flowing layer 31；
It further include water inlet pipe 6 and permeability cell 7, the water inlet of the water inlet pipe 6 protrudes into first by the side of the first gravel layer 2
In gravel layer 2, the side of second gravel layer 4 is equipped with water outlet 8；The permeability cell 7 is protruded by surface layer 1 and sequentially passes through table
The 1, first gravel layer of layer 2 and compound sewage process layer 3.
As can be seen from the above description, the beneficial effects of the present invention are:
Above-mentioned water inlet pipe, permeability cell are set, so that array soil sewage disposal system realizes that top water inlet and bottom go out
Water, by the longitudinal layered surface layer for being laid with different infiltration coefficients, the first gravel layer, compound sewage process layer, the second gravel layer and
Impervious barrier makes to be formed alternately existing unsaturated zone inside array soil sewage disposal system；The above-mentioned compound dirt of the application
Water process layer, soil horizon is slow infiltration layer, then the above-mentioned water flowing layer of matching design, while permeability cell runs through water flowing layer, passes through permeability cell
Gas exchanges can be carried out in water flowing layer.At runtime, sewage first passes through surface layer to the array soil sewage disposal system of the application,
Pollutant realizes drop by processes such as retention, absorption, ion exchange, redox and microbial degradations in topsoil
Solution, while being anaerobic zone inside surface layer, hardly degraded organic substance is by anaerobic degradation；Sewage enters in compound sewage process layer later
Water flowing layer, on the one hand, water flowing layer is by absorption and the fixed a part of ammonia nitrogen of ion exchange, and on the other hand, water is quick in water flowing layer
Next layer is flowed into, unsaturation band is formed, the air in permeability cell can spread into water flowing layer, and water flowing layer is made to form anoxic zone, ammonia nitrogen
Nitrate and nitrite are converted by nitrobacteria, then sewage is into next layer of soil horizon, nitrate and nitrous acid
After salt is converted into nitrogen, nitrogen enters water flowing layer and is excluded by snorkel；At least one layer of soil horizon and at least two layers logical
The arrangement of water layer alternate multilayer, replaces anoxic-anaerobic processes repeatedly, and then realizes the efficient removal to ammonia nitrogen.
Further, the material of the water flowing layer 31 is the guanite or zeolite that partial size is 10-15mm.
Further, it is 10-15mm that the material of at least one layer of water flowing layer 31 at least two layers of water flowing layer 31, which is partial size,
Guanite.
Further, the surface layer 1 with a thickness of 195-205mm, first gravel layer 2 with a thickness of 195-205mm,
The thickness of the water flowing layer 31 and soil horizon 32 is respectively 95-105mm, second gravel layer 4 with a thickness of 195-205mm,
The impervious barrier 5 with a thickness of 45-55mm.
Further, the water inlet pipe 6 is distributed along the width direction of the first gravel layer 2.
Further, the water outlet 8 is arranged far from permeability cell 7.
Further, the number of the water flowing layer 31 is 6 layers, and the number of the soil horizon 32 is 5 layers, 6 layers of water flowing layer
Successively alternate intervals are arranged between 31 and 5 layers of soil horizon 32.
Further, in 6 layers of water flowing layer 31, along surface layer 1 to 5 direction of impervious barrier, positioned at the water flowing layer 31 of first layer
Material is the guanite that partial size is 10-15mm, and the material of other 5 layers of water flowing layers 31 is the zeolite that partial size is 10-15mm.
In the present invention, designed by the partial size to the first gravel layer and the second gravel layer, due to the big gravel layer hole of partial size
Diameter is big, and flow velocity is fast, and the small gravel layer aperture of partial size is small, and flow velocity is slow, and then to adjust internal flow velocity.
Material selection for water flowing layer, zeolite cation exchange capacity (CEC) with higher can be carried out with the ammonium ion in water
Ion exchange realizes the removal to ammonium；Meanwhile zeolite can realize phosphorus by the phosphorus in complexing and the fixed water of suction-operated
Removal.Guanite is that molecular formula is MgNH4PO4·6H2O is a kind of white crystal for being insoluble in water.Zeolite while fixed nitrogen
And phosphorus, guanite can be formed, and recycle as organic fertilizer.The partial size of zeolite determines the partial size of zeolite layer porous media, compared with
Big partial size, the water flow velocity fast residence time is shorter, compared with small particle, easily blocks, can cause system crash.
For the thickness design of above layers level structure, the design of the specific level thickness range value of the application has and obtains
The advantages of obtaining preferable flow velocity, residence time, removal efficiency and cost.
The application has unpowered (utilizing height difference gravity stream), is not easy to plug (multilayer compared with conventional soil processing system
Different porous media partial sizes are staggered, and water flow has a variety of channels), it is easy to maintain (to make to block up by intermittent duty and snorkel
Plug restores) the advantages that.
Please refer to Fig. 1, the embodiment of the present invention one are as follows:
The array soil sewage disposal system of the present embodiment, it is the surface layer 1 set including successively layer, the first gravel layer 2, compound
The material of sewage treatment layer 3, the second gravel layer 4 and impervious barrier 5, the surface layer 1 is soil, with a thickness of 200mm, first gravel
The material of rock layers 2 is the gravel that partial size is 20-30mm, and with a thickness of 200mm, the material of second gravel layer 4 is that partial size is
The gravel of 40mm, with a thickness of 200mm；
The compound sewage process layer 3 includes 32,6 layers of soil horizon of water flowing layer of 6 layers of the water flowing layer 31 and 5 layer that layer is set
Successively interval setting alternate with each other between 31 and 5 layers of soil horizon 32；Along surface layer 1 to 5 direction of impervious barrier, positioned at the logical of first layer
The material of water layer 31 is the guanite that partial size is 10-15mm, and the material of other 5 layers of water flowing layers 31 is the boiling that partial size is 10-15mm
Stone.The thickness of water flowing layer 31 and soil horizon 32 is 100mm.
It further include water inlet pipe 6 and permeability cell 7, the water inlet of the water inlet pipe 6 protrudes into first by the side of the first gravel layer 2
In gravel layer 2, under the visual angle Fig. 1, water inlet pipe 6 is distributed along the width direction of the first gravel layer 2.The permeability cell 7 is stretched by surface layer 1
Enter and sequentially pass through surface layer 1, the first gravel layer 2 and 6 layer water flowing layer 31 and 5 layer soil horizon 32；Second gravel layer 4
Side is equipped with water outlet 8 and is arranged far from permeability cell 7.
It is shown in Figure 1, in Fig. 1, filled arrows indicate water inlet and water discharging direction, hollow arrow indicate air inlet and
Discharge directions.At runtime, sewage first passes through surface layer to the array soil sewage disposal system of the present embodiment, and pollutant is on surface layer
Degradation is realized by processes such as retention, absorption, ion exchange, redox and microbial degradations in soil, while in surface layer
Portion is anaerobic zone, and hardly degraded organic substance is by anaerobic degradation；Sewage enters in 6 in compound sewage process layer layers of water flowing layer later
First layer water flowing layer, first layer water flowing layer are the guanite that partial size is 10-15mm, on the one hand, guanite passes through absorption and ion
A part of ammonia nitrogen of crossover fixation, on the other hand, water flows rapidly into next layer in water flowing layer, forms unsaturation band, in permeability cell
Air can spread into water flowing layer, and water flowing layer is made to form anoxic zone, and ammonia nitrogen is converted into nitrate and nitrite by nitrobacteria, after
And sewage is into next layer of soil horizon, after nitrate and Nitrite transformation are nitrogen, nitrogen enters water flowing layer and passes through
Snorkel excludes；5 layers of soil horizon and the arrangement of 6 layers of water flowing layer alternate multilayer, replace anoxic-anaerobic processes repeatedly, in turn
Realize the efficient removal to ammonia nitrogen.
In conclusion array soil sewage disposal system provided by the invention has the efficient removal that can be achieved to ammonia nitrogen
The advantages of.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (8)
1. a kind of array soil sewage disposal system, which is characterized in that the surface layer that is set including successively layer, the first gravel layer, multiple
Sewage treatment layer, the second gravel layer and impervious barrier are closed, the material on the surface layer is soil, and the material of first gravel layer is grain
Diameter is the gravel of 20-30mm, and the material of second gravel layer is the gravel that partial size is 38-42mm；
The compound sewage process layer includes at least two layers of the water flowing layer and at least one layer of soil horizon that layer is set, at least one layer of
Soil horizon is between at least two layers of water flowing layer, and between replacing between at least one layer of soil horizon and at least two layers of water flowing layer
Every setting；
It further include water inlet pipe and permeability cell, the water inlet of the water inlet pipe protrudes into the first gravel layer by the side of the first gravel layer
Interior, the side of second gravel layer is equipped with water outlet；The permeability cell is protruded by surface layer and is sequentially passed through surface layer, the first gravel
Layer and compound sewage process layer.
2. array soil sewage disposal system according to claim 1, which is characterized in that the material of the water flowing layer is
Partial size is the guanite or zeolite of 10-15mm.
3. array soil sewage disposal system according to claim 2, which is characterized in that at least two layers of water flowing layer
The material of at least one layer of water flowing layer be guanite that partial size is 10-15mm.
4. array soil sewage disposal system according to claim 1, which is characterized in that the surface layer with a thickness of
195-205mm, first gravel layer with a thickness of 195-205mm, the thickness of the water flowing layer and soil horizon is respectively 95-
105mm, second gravel layer with a thickness of 195-205mm, the impervious barrier with a thickness of 45-55mm.
5. array soil sewage disposal system according to claim 1, which is characterized in that the water inlet pipe is along the first gravel
The width direction of rock layers is distributed.
6. array soil sewage disposal system according to claim 1, which is characterized in that the water outlet is far from ventilative
Pipe setting.
7. array soil sewage disposal system according to claim 1, which is characterized in that the number of the water flowing layer is
6 layers, the number of the soil horizon is 5 layers, and successively alternate intervals are arranged between 6 layers of water flowing layer and 5 layers of soil horizon.
8. array soil sewage disposal system according to claim 7, which is characterized in that in 6 layers of water flowing layer, along table
Layer is to impervious barrier direction, and the material positioned at the water flowing layer of first layer is the guanite that partial size is 10-15mm, other 5 layers of water flowing layers
Material be zeolite that partial size is 10-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910961685.9A CN110526402A (en) | 2019-10-11 | 2019-10-11 | A kind of array soil sewage disposal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910961685.9A CN110526402A (en) | 2019-10-11 | 2019-10-11 | A kind of array soil sewage disposal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110526402A true CN110526402A (en) | 2019-12-03 |
Family
ID=68671920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910961685.9A Pending CN110526402A (en) | 2019-10-11 | 2019-10-11 | A kind of array soil sewage disposal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149209A (en) * | 2021-04-15 | 2021-07-23 | 西北工业大学 | Series vertical aerobic-anaerobic combined underground soil infiltration system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110100905A1 (en) * | 2009-11-02 | 2011-05-05 | Korea Institute Of Science And Technology | River water purification apparatus and method using treatment soil layer and permeable filtering medium layer |
| CN102531173A (en) * | 2012-03-02 | 2012-07-04 | 浙江大学 | Composite medium biological filter sewage treatment method and matched device |
-
2019
- 2019-10-11 CN CN201910961685.9A patent/CN110526402A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110100905A1 (en) * | 2009-11-02 | 2011-05-05 | Korea Institute Of Science And Technology | River water purification apparatus and method using treatment soil layer and permeable filtering medium layer |
| CN102531173A (en) * | 2012-03-02 | 2012-07-04 | 浙江大学 | Composite medium biological filter sewage treatment method and matched device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149209A (en) * | 2021-04-15 | 2021-07-23 | 西北工业大学 | Series vertical aerobic-anaerobic combined underground soil infiltration system |
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