CN114804522A - Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode - Google Patents
Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode Download PDFInfo
- Publication number
- CN114804522A CN114804522A CN202210440418.9A CN202210440418A CN114804522A CN 114804522 A CN114804522 A CN 114804522A CN 202210440418 A CN202210440418 A CN 202210440418A CN 114804522 A CN114804522 A CN 114804522A
- Authority
- CN
- China
- Prior art keywords
- water
- layer
- artificial wetland
- grey
- dry
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000000926 separation method Methods 0.000 title claims abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 20
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010457 zeolite Substances 0.000 claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 15
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 8
- 239000010797 grey water Substances 0.000 claims description 60
- 239000011159 matrix material Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- 210000005056 cell body Anatomy 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 79
- 238000005516 engineering process Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010866 blackwater Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241000948950 Fallax Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention relates to a system and a method for treating ash water of a falling dry type artificial wetland in an ash-black separation mode, wherein the falling dry type artificial wetland treatment system comprises a falling dry type artificial wetland in a water collecting sedimentation tank which is sequentially communicated through a sewage pipeline; a peristaltic pump with a timer is arranged on the sewage pipeline; the dry-falling artificial wetland comprises a tank body, a substrate layer arranged in the tank body and a plant layer arranged on the substrate layer, wherein the substrate layer comprises a ceramsite layer, a zeolite layer, a river sand layer and a large gravel layer which are sequentially arranged from bottom to top, and a water outlet is formed in the bottom of the tank body. The invention has the advantages of high sewage treatment efficiency, simple and convenient operation method, simple and easy maintenance and low operation cost.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a system and a method for treating ash water of a falling dry-type artificial wetland in an ash-black separation mode.
Background
Domestic sewage is a key task for rural residential environment improvement, various kinds of sewage generated by families are uniformly managed by a common rural domestic sewage treatment mode at present, and the sewage is sent to a tail end treatment facility for treatment through a complex pipe network. The method for treating sewage has the inevitable huge cost for the construction of the pipe network in rural areas with low population density and scattered residence. In addition, when the sewage is mixed and collected, the huge difference between grey water and black water is ignored, namely the problem of dilution and pollution is brought, the difficulty in sewage treatment is increased, and nutrients in the sewage are abandoned, so that the nutrients cannot be recycled, and the resources and the energy are greatly wasted.
The dry-type artificial wetland is a mature ecological treatment technology, has certain advantages in the aspects of treating ash and black separated ash and water in situ or nearby and reducing the cost of sewage conveying and treatment, but at present, the traditional dry-type artificial wetland technology often limits the sewage treatment efficiency due to insufficient oxygen supply, especially on the treatment of organic matters and ammonia nitrogen; the method and the system for treating the rural grey water based on the grey-black separation mode are high in sewage treatment efficiency, simple and convenient in operation method, easy and simple to maintain and low in operation cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a system and a method for treating ash water of a falling dry type artificial wetland in an ash-black separation mode, which have the advantages of high sewage treatment efficiency, simple and convenient operation method, simple and easy maintenance and low operation cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the first technical scheme is as follows:
a grey-black separation mode falling dry type artificial wetland grey water treatment system comprises a water collecting sedimentation tank falling dry type artificial wetland which is sequentially communicated through a sewage pipeline; a peristaltic pump with a timer is arranged on the sewage pipeline; the dry-falling artificial wetland comprises a tank body, a substrate layer arranged in the tank body and a plant layer arranged on the substrate layer, wherein the substrate layer comprises a ceramsite layer, a zeolite layer, a river sand layer and a large gravel layer which are sequentially arranged from bottom to top, and a water outlet is formed in the bottom of the tank body.
Furthermore, the water inlet of cell body set up in the top of cell body, the outlet pipe of sedimentation tank catchments sets up in the top of sedimentation tank catchments, the outlet pipe downwardly extending to catchment in the sedimentation tank below the liquid level, sewage pipe's both ends respectively with the outlet pipe with the water inlet is linked together.
Furthermore, a water distribution device is arranged above the large gravel layer and comprises a plurality of water distribution branch pipes communicated with the sewage pipeline through water distribution main pipes, and a plurality of water distribution holes are uniformly formed in the water distribution branch pipes.
Furthermore, the water distribution device is erected on the pool body, and the distance from the water distribution device to the upper surface of the large gravel layer is 20-40 cm.
Furthermore, a plurality of vent pipes are embedded in the matrix layer in the tank body, the vent pipes longitudinally penetrate through the matrix layer and extend to the top of the tank body, a plurality of vent holes are formed in the matrix layer and above the base layer, and the distance from the vent holes above the matrix layer to the upper surface of the matrix layer is larger than or equal to 10 cm.
Furthermore, the filling thickness ratio of the zeolite layer to the river sand layer is 3: 1.
Furthermore, the particle size of the ceramsite layer is 8-16 mm, the particle size of the zeolite layer is 4-8 mm, the particle size of the river sand layer is 0.5-2 mm, and the particle size of the large gravel layer is 32-64 mm.
Further, the timer controls the peristaltic pump to intermittently feed water to the dry-type artificial wetland.
The second technical scheme is as follows:
a method for treating the grey water by using the falling dry type artificial wetland grey water treatment system in the grey-black separation mode adopts a periodic intermittent mode of a mode combination mode II to treat the grey water; wherein the first mode is as follows: an intermittent operation mode of 2 days of rest every 5 days; the second mode is as follows: when the artificial wetland system operates, the operation is circularly carried out by adopting an operation mode of rapid water inlet, purification, emptying, vacant and reoxygenation according to the frequency of 4-6 times of circulation every day.
Further, the second mode specifically includes:
the second mode specifically includes:
step 1, water inlet: quickly discharging the grey water in the adjusting sedimentation tank into the dry-type artificial wetland; after the grey water enters the dry-type artificial wetland, a water seal is formed above the large gravel layer,
Further, in the step 1, when the grey water in the sedimentation tank is adjusted to be discharged into the dry-type artificial wetland, the flow speed is 6-9L/m 2 Min, the water amount discharged into the dry-type artificial wetland once and fed into the wet-type artificial wetland once is 70-110L/m 2 ；
In the step 3, the idle time is 3-6 h.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the technical surrounding rock for sewage treatment in the traditional mode in which grey water and black water are mixed and then are conveyed to large-scale sewage treatment equipment, the method can directly treat grey water separated from ash and black in situ or nearby, greatly reduce the cost of sewage conveying and treatment, and is easy to popularize in rural areas in China.
2. According to the invention, on one hand, the negative pressure generated by water level change in the sewage infiltration process is utilized to enhance the convection effect, so that the reaeration capability of the wetland is improved, on the other hand, the atmospheric reaeration is enhanced by emptying and idling the dry-type artificial wetland, compared with the traditional technology, the adoption of the two methods for reaeration does not need expensive equipment energy and professional technical knowledge, the operation and control are simple and convenient, the reaeration capability is strong, and the method is suitable for popularization and use in rural areas in China, and in addition, the problem of substrate layer blockage can be relieved when the emptying and idling are carried out.
3. When sewage treatment is carried out, the grey water is quickly discharged into the dry-type artificial wetland by adopting larger specific pulse volume, so that water seal is formed above the matrix layer, a transient anoxic environment is created for the matrix layer, denitrification and denitrification of the grey water are facilitated, the digestion and denitrification efficiency of the grey water is improved, and the problem of poor denitrification performance in the traditional technology is solved; in addition, the water seal layer also optimizes the hydraulic flow state, and further improves the removal efficiency of the constructed wetland on pollutants.
The invention adopts a mode of running a bed for 2 days for 5 days and a mode of combining rapid water inlet, purification and emptying empty periodic circulation to treat the grey water, and the mode is used for treating COD and NH 4 + The removal rates of-N, TN and TP reach 92.17%, 91.46%, 83.95% and 81.69% in the warm season, and reach 86.73%, 87.57%, 71.58% and 80.67% in the cold season, so that the method has better comprehensive removal efficiency.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1 (without showing the plant);
in the figure: 1. a sewage pipeline 2, a water collecting sedimentation tank 3 and a dry-type artificial wetland; 4. a timer, 5, a peristaltic pump; 6. the pool body, 7, a matrix layer, 8, a plant layer, 9, a ceramsite layer, 10, a zeolite layer, 11, a river sand layer, 12, a large gravel layer, 13 and a water outlet. 14. Water distribution main pipes 15, water distribution branch pipes 16 and water distribution holes. 17. Air pipe, 18, air vent, 19, water inlet.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
an embodiment of a grey water treatment system for a falling dry artificial wetland in a grey-black separation mode according to the invention as shown in fig. 1-2 comprises a water-collecting sedimentation tank 2 and a falling dry artificial wetland 3 which are sequentially communicated through a sewage pipeline 1; a peristaltic pump 5 with a timer 4 is arranged on the sewage pipeline 1; the dry-falling artificial wetland 3 comprises a tank body 6, a substrate layer 7 arranged in the tank body 6 and a plant layer 8 arranged on the substrate layer 7, wherein the substrate layer 7 comprises a ceramsite layer 9, a zeolite layer 10, a river sand layer 11 and a large gravel layer 12 which are sequentially arranged from bottom to top, and a water outlet 13 is arranged at the bottom of the tank body 6. The bottom of the artificial wetland is provided with the water outlet 13, so that no saturated water layer is arranged in the artificial wetland.
Further, the plant layer 8 can be freely selected according to the preference of the farmers, and as a preferable scheme, a drought-tolerant plant iris fallax can be planted in summer, and a cold-tolerant plant iris siberian can be planted in winter.
Further, a water inlet 19 of the tank body 6 is formed in the top of the tank body 6, a water outlet pipe of the water collecting sedimentation tank 2 is formed in the top of the water collecting sedimentation tank 2, the water outlet pipe extends downwards to a position below the liquid level in the water collecting sedimentation tank 2, and two ends of the sewage pipeline 1 are communicated with the water outlet pipe and the water inlet 19 respectively.
As an embodiment of the ash and water treatment system for a falling dry type artificial wetland in an ash and black separation mode, a water distribution device is further arranged above the large gravel layer 12, the water distribution device comprises a plurality of water distribution branch pipes 15 communicated with the sewage pipeline 1 through water distribution main pipes 14, and a plurality of water distribution holes 16 are uniformly arranged on the water distribution branch pipes 15. The water distribution holes 16 are uniformly distributed, so that the uniform water distribution of the artificial wetland can be realized, and the short flow phenomenon is avoided.
Further, the water distribution device is erected on the tank body 6, and the distance from the water distribution device to the upper surface of the large gravel layer 12 is 20-40 cm.
As an embodiment of the ash-black separation mode falling dry-type artificial wetland ash water treatment system, a plurality of vent pipes 17 are further embedded in a substrate layer 7 in a tank body 6, the vent pipes 17 longitudinally penetrate through the substrate layer 7 and extend to the top of the tank body 6, the vent pipes 17 are respectively provided with a plurality of vent holes 18 in the substrate layer 7 and above the substrate layer, and the distance from the vent holes 18 above the substrate layer 7 to the upper surface of the substrate layer 7 is more than or equal to 10 cm; further, the distance from the vent hole 18 positioned at the lowest layer above the substrate layer 7 to the substrate layer 7 is 10 cm; when rainfall is too much in rainy days, water flow cannot timely infiltrate downwards, at the moment, sewage above the matrix layer 7 can overflow from the vent holes 18 above the matrix layer 7, the stability of wetland operation is guaranteed, and water blocking is avoided.
As an example of the grey water treatment system of the falling dry type artificial wetland in the grey-black separation mode according to the present invention, the filling thickness ratio of the zeolite layer 10 to the river sand layer 11 is 3: 1.
Further, the thickness of the ceramsite layer 9 is 10cm, and the ceramsite layer is used for filtering grey water; the thickness of the zeolite layer 10 is 60cm, the zeolite layer has a porous structure, the zeolite layer not only can adsorb ammonia nitrogen, but also is beneficial to growth and attachment of microorganisms to form biological zeolite, the conversion efficiency of the ammonia nitrogen is improved, the thickness of the river sand layer 11 is 20cm, and the zeolite layer is used as a filter material on one hand, on the other hand, the property of small particle size of the zeolite layer is utilized, the infiltration speed of the grey water is reduced, a water seal is formed above the matrix layer 7, the contact treatment time of the grey water with the matrix and the microorganisms is prolonged, and simultaneously, phosphorus in the grey water can be adsorbed; the thickness of big gravel layer 12 is 32~64cm, can play the effect of scour protection.
Further, the particle size of the ceramic particle layer 9 is 8-16 mm, the particle size of the zeolite layer 10 is 4-8 mm, the particle size of the river sand layer 11 is 0.5-2 mm, and the particle size of the large gravel layer 12 is 32-64 mm.
As an embodiment of the grey water treatment system of the falling dry type artificial wetland in the grey-black separation mode, the timer 4 controls the peristaltic pump 5 to intermittently feed water into the falling dry type artificial wetland 3, and the water feeding flow rate is 6-9L/m during water feeding 2 ·min。
Example 2:
the invention shows an embodiment of a method for treating grey water by using the falling dry artificial wetland grey water treatment system in the grey-black separation mode of the embodiment 1, which adopts a periodic intermittent mode of mode combination mode two to treat the grey water;
the method for treating the grey water in a periodic batch mode comprises the following steps: 2 operation modes, wherein the first mode is as follows: an intermittent operation mode of 2 days of rest every 5 days; the second mode is as follows: when the artificial wetland system operates, the operation is circularly carried out by adopting an operation mode of rapid water inlet, purification, emptying, vacant reoxygenation according to the frequency of 4-6 times of circulation every day;
the second mode specifically includes:
step 1, water inlet: at 7.13L/m 2 Uniformly discharging the grey water in the sedimentation tank into the tank body 6 of the dry-type artificial wetland 3 through a water distribution device at a flow rate of min, carrying out atmospheric oxygenation on the grey water in the process of falling into the tank body 6, wherein the water inflow of the dry-type artificial wetland 3 in one water inlet process is 70-110L/m 2 (ii) a After the grey water enters the dry-type artificial wetland 3, water seal is formed above the large gravel layer 12,
As an embodiment of the method for treating the grey water by using the grey-black separation mode falling dry-type artificial wetland grey water treatment system in the embodiment 1, the sequence times of the step 1-3 are controlled to be 4-6 times every day. The invention adopts a 'rapid water inlet-evacuation-idle' water inlet mode to enhance reoxygenation, simultaneously large-volume rapid water inlet is easy to form water seal on the surface layer of the substrate, a transient anoxic environment can be created, and the problems of good reoxygenation effect, poor denitrification performance and high reoxygenation cost of the artificial wetland in the traditional technology are solved. The oxygen enters the wetland mainly through convection and diffusion. Not only by the convection enhancement of the bulk inlet waterOxygen content, certain idle time is ensured, the atmospheric diffusion oxygen content is enhanced, and the influence of the too low cold season temperature on the water passing capacity and the microbial activity of the wetland is considered, so the optimal water inlet scheme of the invention is as follows: in warm seasons, water is fed for 6 times per day, and the single water inflow is 106.88L/m 2 The water is fed for 4 times per day in cold seasons, and the single water inflow is 71.25L/m 2 。
The action of the plants in the dry-type artificial wetland 3 on pollutants is small, a farmer can select landscape plants according to the preference of the farmer, and intermittent water inflow is considered as an operation mode.
Considering that rural domestic sewage ash water and water has high organic matter content and sufficient dissolved oxygen, microorganisms are easy to breed in large quantities to cause the decrease of matrix permeability coefficient, so that wetland matrix water blocking is caused, and continuous operation is not suitable, the method adopts an operation mode of 2-day bed rest in 5-day operation.
The system and method of the present invention are used for purifying ash water in COD and NH 4 + Under the condition that the average inlet water concentration of-N, TN and TP is 223mg/L, 6.78mg/L, 24.27mg/L and 2.34mg/L, the invention can treat COD and NH in warm seasons 4 + The removal rates of-N, TN and TP respectively reach 92.17%, 91.46%, 83.95% and 81.69%; to COD and NH in cold seasons 4 + The removal rates of-N, TN and TP respectively reach 86.73%, 87.57%, 71.58% and 80.67%; the effluent reaches the first-grade A drainage standard DB 32/3462-.
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. A grey-black separation mode falling dry-type artificial wetland grey water treatment system is characterized by comprising a water collecting sedimentation tank (2) and a falling dry-type artificial wetland (3) which are sequentially communicated through a sewage pipeline (1); a peristaltic pump (5) with a timer (4) is arranged on the sewage pipeline (1); the dry-type artificial wetland (3) that falls includes cell body (6), set up in matrix layer (7) in cell body (6), and set up in plant layer (8) on matrix layer (7), matrix layer (7) include haydite layer (9), zeolite layer (10), river sand layer (11) and big gravel layer (12) that from the bottom up set gradually, the bottom of cell body (6) is provided with delivery port (13).
2. The ash and black separation mode falling dry artificial wetland grey water treatment system according to claim 1, characterized in that a water distribution device is further arranged above the large gravel layer (12), the water distribution device comprises a plurality of water distribution branch pipes (15) communicated with the sewage pipeline (1) through water distribution main pipes (14), and a plurality of water distribution holes (16) are uniformly arranged on the water distribution branch pipes (15).
3. The ash and black separation mode falling dry artificial wetland grey water treatment system according to claim 2, wherein the water distribution device is erected on the tank body (6), and the distance from the water distribution device to the upper surface of the large gravel layer (12) is 20-40 cm.
4. The ash and black separation mode falling dry artificial wetland grey water treatment system according to claim 1, characterized in that a plurality of vent pipes (17) are further embedded in the substrate layer (7) in the tank body (6), the vent pipes (17) longitudinally penetrate through the substrate layer (7) and extend to the top of the tank body (6), the vent pipes (17) are provided with a plurality of vent holes (18) in the substrate layer (7) and above the substrate layer, and the distance from the vent holes (18) above the substrate layer (7) to the upper surface of the substrate layer (7) is greater than or equal to 10 cm.
5. The grey and black separation mode falling dry artificial wetland grey water treatment system according to claim 1, characterized in that the filling thickness ratio of the zeolite layer (10) to the river sand layer (11) is 3: 1.
6. The ash and black separation mode falling dry type artificial wetland grey water treatment system according to claim 1, wherein the particle size of the ceramic particle layer (9) is 8-16 mm, the particle size of the zeolite layer (10) is 4-8 mm, the particle size of the river sand layer (11) is 0.5-2 mm, and the particle size of the large gravel layer (12) is 32-64 mm.
7. The grey water treatment system of a falling dry artificial wetland in a grey and black separation mode according to claim 1, characterized in that the timer (4) controls the peristaltic pump (5) to intermittently feed water to the falling dry artificial wetland (3).
8. A method for treating grey water using the falling dry artificial wetland grey water treatment system in the grey-black separation mode according to any one of claims 1 to 7, characterized in that the treatment of grey water is performed in a periodic intermittent manner in the mode two; wherein the first mode is as follows: an intermittent operation mode of 2 days of rest every 5 days; the second mode is as follows: when the artificial wetland system operates, the operation is circularly carried out by adopting an operation mode of rapid water inlet, purification, emptying, vacant and reoxygenation according to the frequency of 4-6 times of circulation every day.
9. The method for treating gray water of a dry artificial wetland gray water treatment system using a gray-black separation mode as claimed in claim 8, wherein,
the second mode specifically includes:
step 1, water inlet: quickly discharging the grey water in the adjusting sedimentation tank into the dry-type artificial wetland (3); after the grey water enters the dry-type artificial wetland (3), a water seal is formed above the large gravel layer (12),
step 2, grey water purification: grey water passes through the matrix layer (7) in a plug flow mode, denitrification reaction is carried out in an anoxic environment created by water seal, zeolite of the matrix layer (7) is used for adsorbing ammonia nitrogen, river sand is used for adsorbing phosphorus, purification of the grey water is realized, and then purified sewage is discharged from a water outlet (13);
step 3, reoxygenation: after the grey water entering the dry-type artificial wetland (3) is emptied, the space is empty, and after atmospheric diffusion reoxygenation is carried out, the step 1-3 is circulated again to carry out the treatment of the grey water.
10. The method for treating gray water of a dry artificial wetland gray water treatment system using a gray-black separation mode as claimed in claim 8, wherein,
in the step 1, when the grey water in the sedimentation tank is adjusted to be discharged into the dry-type artificial wetland (3), the flow speed is 6-9L/m 2 Min, the water amount discharged into the dry-type artificial wetland (3) once and fed is 70-110L/m 2 ；
In the step 3, the idle time is 3-6 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210440418.9A CN114804522A (en) | 2022-04-25 | 2022-04-25 | Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210440418.9A CN114804522A (en) | 2022-04-25 | 2022-04-25 | Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114804522A true CN114804522A (en) | 2022-07-29 |
Family
ID=82508447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210440418.9A Pending CN114804522A (en) | 2022-04-25 | 2022-04-25 | Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114804522A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016487A (en) * | 2014-06-04 | 2014-09-03 | 厦门国寿种猪开发有限公司 | Artificial wetland |
| CN110015759A (en) * | 2019-04-23 | 2019-07-16 | 东南大学 | It is a kind of strengthen nitrogen phosphorus absorb fall dry type artificial wet land system and method |
| CN113354088A (en) * | 2021-04-30 | 2021-09-07 | 东南大学 | Device for treating rural domestic sewage tail water by forage grass type falling-dry artificial wetland |
| CN113371927A (en) * | 2021-04-30 | 2021-09-10 | 东南大学 | Be adapted to small-size distributed rural domestic sewage's processing system |
-
2022
- 2022-04-25 CN CN202210440418.9A patent/CN114804522A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016487A (en) * | 2014-06-04 | 2014-09-03 | 厦门国寿种猪开发有限公司 | Artificial wetland |
| CN110015759A (en) * | 2019-04-23 | 2019-07-16 | 东南大学 | It is a kind of strengthen nitrogen phosphorus absorb fall dry type artificial wet land system and method |
| CN113354088A (en) * | 2021-04-30 | 2021-09-07 | 东南大学 | Device for treating rural domestic sewage tail water by forage grass type falling-dry artificial wetland |
| CN113371927A (en) * | 2021-04-30 | 2021-09-10 | 东南大学 | Be adapted to small-size distributed rural domestic sewage's processing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214611752U (en) | Nitrogen and phosphorus removal undercurrent artificial wetland system | |
| CN104556378B (en) | The integrated processing system of a kind of domestic sewage in rural areas and technique thereof | |
| CN101391855B (en) | Method for treating rural disperse sewage by using high load vermibiofilter | |
| CN218025786U (en) | High and cold rural area domestic sewage treatment system | |
| CN108946950A (en) | A kind of multifunction manual chinampa water purification system | |
| CN106007181A (en) | Tidal mixed flow constructed wetland system and sewage treatment method | |
| CN110668575A (en) | Full-automatic efficient nitrogen and phosphorus removal tidal flow constructed wetland and use method thereof | |
| CN211999337U (en) | Resource regeneration type constructed wetland system | |
| CN205892991U (en) | Biological ecology water treatment facilities | |
| CN115304219A (en) | Integrated equipment and method suitable for rural sewage treatment | |
| CN114956354A (en) | Rural household sewage in-situ treatment system and method | |
| CN111170580A (en) | Sewage purification treatment system | |
| CN107364973B (en) | Sewage treatment system, application thereof and sewage treatment method | |
| CN210559663U (en) | Hood-driven aerobic reaction sewage treatment device | |
| CN216614193U (en) | Artificial wetland | |
| CN217127202U (en) | Three-dimensional hydroponic device of sewage resourceization | |
| CN114804522A (en) | Ash water treatment system and method for falling dry type artificial wetland in ash-black separation mode | |
| CN214990962U (en) | Utilize dry land reed to handle sewage plant | |
| CN113371927B (en) | Be adapted to small-size distributed rural domestic sewage's processing system | |
| CN113354088A (en) | Device for treating rural domestic sewage tail water by forage grass type falling-dry artificial wetland | |
| CN213327175U (en) | Multifunctional composite type artificial wetland sewage treatment system | |
| CN110963580B (en) | Modularized constructed wetland suitable for low-temperature environment and sewage treatment method | |
| CN101249998A (en) | Artificial wet-land pulse water distribution method and system thereof | |
| CN211813996U (en) | Bury formula sewage treatment device | |
| CN210393887U (en) | Small-size sewage treatment integration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220729 |