CN110683713A - Ecological treatment system for rural decentralized kitchen sewage - Google Patents
Ecological treatment system for rural decentralized kitchen sewage Download PDFInfo
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- CN110683713A CN110683713A CN201910984809.5A CN201910984809A CN110683713A CN 110683713 A CN110683713 A CN 110683713A CN 201910984809 A CN201910984809 A CN 201910984809A CN 110683713 A CN110683713 A CN 110683713A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- 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
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Abstract
The invention discloses an ecological treatment system for rural dispersive kitchen sewage, which consists of a matrix strengthening treatment system and a wetland absorption system. The matrix strengthening treatment system comprises a sedimentation tank and a plurality of biological matrix treatment units which are sequentially connected in series through communicating pipelines, and the biological matrix treatment units are filled with naturally degradable biological matrix fillers. The wetland absorption system is formed by communicating 3 or more than 3 ecological wetlands through pipelines. The invention constructs an ecological treatment system for automatically flowing and communicating sewage along a pipeline, and defines the process parameters for constructing the ecological treatment system, mainly comprising hydraulic retention time, area coefficient of a matrix enhanced treatment system, biological matrix input coefficient, area coefficient of a wetland absorption system and the like, and has strong operability and wide applicability. The invention has simple structure and convenient operation, has good treatment effect on pollutants such as COD, nitrogen, phosphorus and the like in the kitchen sewage, particularly animal and plant oil stains, and is suitable for rural dispersive kitchen sewage treatment.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an ecological treatment system for rural dispersive kitchen sewage.
Background
The agricultural and rural water pollution in China mainly comes from village and town living pollution, livestock and poultry breeding pollution, agricultural product processing pollution discharge, farm land drainage and the like. Compared with the urban sewage treatment, the rural water environment pollution source is complex, the distribution area is wide, and the cost for centralized collection of sewage is too high. Therefore, a decentralized sewage treatment mode is mostly used in a non-centralized area of rural population. Particularly, with the rise and development of modern sightseeing agriculture and leisure agriculture, farmhouses are more and more in the catering industry, the income of farmers is increased, meanwhile, the discharge of kitchen waste water is increased, and the problem of rural environmental pollution is aggravated.
The kitchen waste wastewater is mainly derived from water contained in the kitchen waste and water generated in the fermentation process of the kitchen waste, and the kitchen waste wastewater is complex in components, high in organic matter content, mainly containing dietary fiber, starch, fat, animal and vegetable oil, various seasonings, detergents, proteins and the like. Because the fatty acid decomposed by the kitchen waste under the action of high-temperature hydrolysis is not further degraded, the COD mass concentration of the generated wastewater is increased, the solid matters of the kitchen waste contain abundant proteins, and the proteins are aminated in the digestion process, so that the kitchen waste wastewater has high-level ammonia nitrogen and total nitrogen concentration, the carbon-nitrogen ratio is low, the anaerobic digestion is influenced, and the subsequent biochemical treatment of the wastewater is also influenced. Due to the inhibition effect of high ammonia nitrogen, the biochemical treatment has great difficulty.
At present, most of dispersed sewage treatment in rural areas is subsurface flow wetland and surface flow wetland (including ecological ditches), and is a relatively successful ecological sewage treatment technology. For example, the invention patent CN201210426016.X discloses a combined town sewage treatment artificial wetland system and a town sewage treatment method. The system comprises a biological regulation pool unit, an aerobic degradation and microorganism culture pool, a subsurface flow wetland and a surface flow wetland which are sequentially connected in series, wherein a gravel layer, a fine sand layer, a vermiculite and fine sand mixed layer and a fine sand and red soil mixed layer are sequentially arranged on a substrate in the subsurface flow wetland from bottom to top, and the surface flow wetland is provided with various water-lifting type, floating leaf type, floating type and submerged type aquatic plants from shallow to deep. However, in the method, the subsurface flow wetland takes gravel, fine sand and other porous medium materials as a percolation layer, and the adsorption performance of the percolation layer to pollutants is reduced along with the increase of the running time of the wetland, so that the whole system is completely failed, and the cost is increased; meanwhile, the kitchen waste oil in the sewage is high in content, the waste oil is slowly degraded and floats on the surface layer of the sewage, and the waste oil can be attached to the leaf surfaces or stems of wetland plants after entering the surface flow wetland, so that the plants are easy to die; and the design and construction of the subsurface flow wetland and the surface flow wetland lack unified technical specifications, which causes great randomness in the process parameter setting of the actual engineering construction. The invention patent CN201910361153.1 discloses an A/A/O, MAP combined treatment method of kitchen waste water, which comprises the following steps: (1) adjusting the pH value of the wastewater to 6.8-7.5; (2) the wastewater after pH value adjustment enters an A/A/O system, wherein the A/A/O system comprises an anaerobic fermentation tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank, and the wastewater sequentially enters the anaerobic fermentation tank, the anoxic tank, the aerobic tank and the secondary sedimentation tank; (3) enabling the sediments in the anaerobic fermentation tank and the sludge in the step (2) to enter an MAP system; (4) adding a flocculating agent into the MAP reaction tank; (5) and (3) allowing the product treated in the step (4) to enter an MAP sedimentation tank, standing until clear liquid and sediment are obviously layered, but the kitchen waste oil is high in content and floats on the surface layer of sewage, so that the kitchen waste oil is not easily degraded and removed by anaerobic bacteria or anoxic bacteria. Therefore, the current commonly used anaerobic fermentation tank/subsurface flow wetland is difficult to effectively treat the rural kitchen sewage.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ecological treatment system for rural dispersive kitchen sewage, and solves the problems of poor treatment effect on animal and plant oil stains in the kitchen sewage, high cost and the like in the existing method.
In order to solve the technical problems, the invention adopts the following technical scheme: including matrix strengthening treatment system and wetland system of dissolving, matrix strengthening treatment system includes 1 sedimentation tank and a plurality of biological matrix processing unit of first series connection in proper order through the intercommunication pipeline, sedimentation tank and kitchen sewage discharge pipeline intercommunication, but be equipped with natural degradation's biological matrix filler in the biological matrix processing unit, matrix strengthening treatment system passes through the intercommunication pipeline and links to each other with wetland system of dissolving, and wetland system of dissolving comprises the ecological wetland of pipeline intercommunication more than 3, and the upper portion of wetland system of dissolving has the vegetation.
The sedimentation tank is a primary place for sedimentation and anaerobic treatment of the kitchen sewage, and the biological matrix treatment unit is a secondary place for putting biological matrix and adsorbing and decomposing sewage pollutants. The matrix strengthening treatment system generally comprises 1 sedimentation tank or more than 2 biological matrix treatment units.
Preferably, the sedimentation tank and the biological matrix treatment unit in the matrix strengthening treatment system are both regular closed tank bodies, and the bottom and the peripheral wall of the tank body are subjected to hardening and water-tight treatment to prevent sewage from seeping; the top is hardened and sealed, but a working wellhead with a diameter of about 60cm is reserved for removing sediment or throwing in biological matrix filler during system maintenance. During operation of the system, each well head is closed by a well cover.
Preferably, a plurality of inserting openings are formed in the wall of the biological substrate processing unit, the inserting openings are uniformly distributed in a rectangular array and correspondingly arranged corresponding to the inserting openings in the wall of the biological substrate processing unit, and blocking rods are arranged between the corresponding inserting openings. Therefore, the biological matrix filler is distributed on a plurality of water layers, and the adsorption of the biological matrix filler on pollutants such as nitrogen, phosphorus, animal and plant oil stains and the like in sewage is enhanced.
Two adjacent sockets are spaced by 1.0-1.5 m in the horizontal direction, and two adjacent sockets are spaced by 1.0-1.5 m in the vertical direction
0.2～0.8m。
Preferably, the water inlets of the biological matrix treatment unit and the ecological wetland are arranged at the bottom of one side wall, and the water outlets of the biological matrix treatment unit and the ecological wetland are arranged at the top of the other side wall, so that the water outlets and the water inlets of the biological matrix treatment unit and the ecological wetland are arranged along diagonal lines. Like this, meal kitchen sewage advances from the bottom, discharges from the diagonal angle top, and the path length of process makes the absorption of pollutants such as nitrogen phosphorus, animal and vegetable oil dirt more thorough in the sewage, and efficiency is higher.
Preferably, the total area of the matrix strengthening treatment system is determined according to the following equation (1):
SA＝N*Vs*D/Hs(1)
in the formula, SAIs the total construction area (m) of the matrix strengthening treatment system2) (ii) a N is the highest daily number of people to eat; vs being of a single visitorThe volume coefficient of the matrix strengthening treatment system is 0.1-0.25 m3(ii) a D is the retention time of the sewage in the matrix strengthening treatment system; hs is the highest water level of the substrate enhanced treatment system. In actual construction, the volume coefficient of the matrix strengthening treatment system can be flexibly adjusted according to actual conditions. If the land area is sufficient, the coefficient can be properly increased, and the overall principle is to keep the hydraulic retention time of the sewage in the matrix strengthening treatment system to be not less than 7 d. Preferably, the construction area ratio of the sedimentation tank to the biological matrix treatment unit is 1: 4.
Preferably, the bio-matrix filler is one or more materials selected from straw, wheat straw and corn stalk. Preferably, the biological matrix filler is subjected to swelling treatment, so that the porosity of cellulose in the biological matrix is increased, surface groups of the cellulose are exposed, and the adsorption capacity and the adsorption quantity of the biological matrix filler are improved. Preferably, the corn stalks are crushed (particle size <5mm) and used with a certain amount of rice or wheat straw. The ratio of the corn stalks to the straws/wheat stalks is 2: 3.
Preferably, the dosage of the bio-matrix filler is determined according to the following formula (2):
W＝V*Ps(2)
wherein W is the total amount (kg) of filler put in the biological matrix treatment unit; v is the total volume of the matrix strengthening treatment system; psThe feeding coefficient of the biological matrix filler for sewage of unit volume is 20-30 Kg/m3. Considering that the decomposition time of the straw filler is 3-4 months, the feeding frequency of the straw filler is 3 times per year, and the total feeding amount of the straw filler is 1/3(W/3) of the total amount.
Preferably, the total area of the wetland digestion system is determined according to the following formula (3):
Sp＝N*PA(3)
in the formula, SpIs the total area (m) of the wetland consumption system2) N is the highest daily number of people to eat; pAThe single dining tourist wetland construction area coefficient is 1-2.5 m2. The depth of water of the ecological wetland is maintained at about 1.5-2.5 m, and the wetland can be flexibly adjusted under the condition that the hydraulic retention of the wetland absorption system is not less than 14d in practical constructionThe depth of the water.
Preferably, the aquatic plants in the multistage wetland are arranged in sequence as large emergent aquatic plants, small emergent aquatic plants and floating plants, and the arrangement ratio of the corresponding planting areas is 3:3: 4. The high-medium-low 3 kinds of aquatic plants are arranged in the multistage wetland along the sewage flowing direction, so that the adsorption and degradation of residual oil stains entering the wetland are facilitated.
Compared with the prior art, the invention has the following beneficial effects:
1. aiming at the characteristics of rural kitchen sewage such as dispersibility, high organic matter concentration, high oil stain content and the like, the invention provides the ecological treatment system for rural dispersive kitchen sewage, which is characterized in that a substrate strengthening treatment system and a wetland absorption system are coupled, the traditional anaerobic fermentation/subsurface flow wetland technology is replaced by the technical combination of substrate strengthening treatment and wetland absorption, and organic pollutants such as nitrogen, phosphorus, oil and the like in the kitchen sewage are effectively adsorbed and degraded by putting in naturally degradable biological substrate materials and reasonably arranging different wetland plant plants, so that the rural dispersive kitchen sewage can be efficiently treated; the problems of removing and degrading the dirty oil in the kitchen sewage are solved, and the defect that the adsorption material needs to be periodically excavated and replaced in the traditional subsurface flow wetland is overcome. In addition, according to the characteristics of rural dispersive kitchen sewage, the invention defines the process parameters for constructing the matrix strengthening treatment system and the wetland digestion system, such as 14d of hydraulic retention time and 0.1-0.25 m of volume coefficient of the matrix strengthening treatment system3The input coefficient of human and biological matrix is 20-30 Kg/m3The area coefficient of the wetland is 1-2.5 m2And the like, obviously improves the sewage treatment effect, has strong operability and has good popularization and application performance.
2. The invention takes natural biological matrix materials (straws, wheat straws and corn stalks) as raw materials, has rich sources and low price, is a renewable and environment-friendly natural material, can be directly decomposed in the treatment process, does not need post treatment, thereby increasing the treatment and utilization ways of the straw wastes of bulk crops such as straws, wheat straws, corn stalks and the like, avoiding environmental pollution and having good application prospect.
3. The wetland digestion system has the advantages of simple structure and convenient operation, can be formed by one or more field drainage channels and a pit pond which is excavated naturally or newly, is suitable for rural dispersibility, is durable and good in treatment effect, and has strong practicability and wide applicability.
Drawings
FIG. 1 is a schematic structural diagram of a decentralized kitchen sewage treatment system for rural areas according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
The embodiment of the invention provides a decentralized kitchen sewage treatment system for rural areas, which is shown in a schematic structural diagram in figure 1 and comprises a matrix strengthening treatment system and a wetland absorption system, wherein the matrix strengthening treatment system comprises a sedimentation tank and 3 biological matrix treatment units which are sequentially connected in series end to end through communication pipelines, the sedimentation tank is communicated with a kitchen sewage discharge pipeline, a naturally degradable biological matrix filler is arranged in the biological matrix treatment unit, the bottoms and the side walls of the sedimentation tank and the biological matrix treatment units are of watertight structures, the matrix strengthening treatment system is connected with the wetland absorption system through the communication pipelines, and the wetland absorption system comprises 3 ecological wetlands which are sequentially connected through the communication pipelines.
The principle and the effect of the technical scheme are as follows: insoluble objects in the sewage are precipitated and treated anaerobically through the system by precipitation treatment. Then, nitrogen, phosphorus and sump oil in the sewage are absorbed and degraded through a plurality of biological matrix treatment units, finally, pollutants in the sewage are further absorbed and absorbed through a wetland absorption system, the animal and plant oil stains can be efficiently removed while the nitrogen and phosphorus in the sewage are removed, and the ecological treatment of the kitchen sewage is completed.
Examples
The example is from Zhejiang a farmhouse happy sewage treatment site. The farmhouse receives about 100 guests at the peak of the dining room. Before the construction of a sewage treatment facility, the farmhouse happy kitchen sewage and mixed domestic sewage is not treated at all, and is directly discharged into the environment through a sewer, so that the pollution to the surrounding water environment is great. The sewage treatment facility is newly built on abandoned land due to the lack of available ditches and natural ponds around.
A processing system for kitchen sewage includes that matrix reinforces processing system and wetland take up the system, matrix reinforces processing system includes sedimentation tank and a plurality of biological matrix processing unit through communicating pipe end to end series connection in proper order, sedimentation tank and kitchen sewage discharge pipeline intercommunication, but fill natural degradation's biological matrix filler in the biological matrix processing unit, sedimentation tank and biological matrix processing unit's bottom and lateral wall are waterproof structure, be provided with a plurality of sockets on biological matrix processing unit's the pool wall, the socket is according to the rectangular array equipartition, and corresponds the socket on the pool wall and correspond the setting, it has the barrier bar to correspond to be provided with between the socket. The adjacent sockets are spaced by 1.0m in the horizontal direction, and the adjacent sockets are spaced by 0.3m in the vertical direction. The substrate strengthening treatment system is connected with the wetland absorption system through a communicating pipeline, the wetland absorption system comprises a primary ecological wetland, a secondary ecological wetland and a tertiary ecological wetland which are sequentially connected through the communicating pipeline, vegetation is planted on the upper part of the wetland absorption system, the tertiary ecological wetland is connected with a water purifying tank, and the water in the water purifying tank is output through a water purifying output pipeline by the water purifying tank.
1.1 matrix strengthening treatment System construction area
The total area formula of the matrix strengthening treatment system:
SA＝N*Vs*D/Hs(1)
in the formula, SAIs the total construction area (m) of the matrix strengthening treatment system2) (ii) a N is the highest daily number of people to eat; vs is the volume coefficient of the matrix strengthening processing system of a single tourist, and the value is 0.1-0.25 m3(ii) a D is the retention time of the sewage in the matrix strengthening treatment system; hs is the highest water level of the substrate enhanced treatment system.
Considering that the maximum number of people for dining is 100, the peak of sewage load is concentrated in the summer with vigorous growth of wetland plants, and the other time is short without dischargeHigh, matrix strengthening treatment system volume coefficient VsTaking the mean value of 0.18m3The hydraulic retention time D of the sewage in the matrix strengthening treatment system takes 7D, and the highest water level Hs of the matrix pool takes 2.5 m. Calculating the construction area S of the matrix strengthening treatment system according to the formula (1)AIs 50.4m2。
1.2 sedimentation basin and biological matrix treatment Unit area and construction requirements
The sedimentation tank is communicated with the biological matrix treatment units through PVC pipelines with the diameter of 5cm, and kitchen sewage firstly flows into the sedimentation tank through the kitchen sewage discharge pipeline and then flows into the biological matrix treatment units in sequence. And the water inlet of each pool is arranged at the bottom of one side wall, and the water outlet is arranged at the top of the other side wall, so that the water outlet and the water inlet of each pool are arranged along a diagonal line. The bottom and side walls of the sedimentation tank and the biological matrix tank are hardened by cement, and the top is hardened and sealed, but a working wellhead with the diameter of 60cm is left. During the engineering operation, the well mouth of each substrate pool is sealed by a well cover.
Because the matrix strengthening treatment system is formed by connecting 1 sedimentation tank and 3 biological matrix treatment units in series end to end, the sedimentation tank and the biological matrix treatment units are arranged according to the area ratio of 1:4 to construct the area ratio configuration, namely the area of the sedimentation tank is 10.1m2(ii) a The specification and the size of 3 biological matrix processing units are consistent, and the monomer area is about 13.4m2。
1.3 amount of biological substrate put
The dosage formula of the biological matrix is as follows:
W＝V*Ps(2)
wherein W is the total amount (kg) of straws put in the biological matrix treatment unit; v is the total volume of the matrix strengthening treatment system; psThe sewage and straw feeding coefficient per unit volume is 20-30 Kg/m3。
As the location of the sewage treatment project is a rice planting area and the straws are rich, the biological matrix treatment unit selects the straws as the matrix pool filler. Coefficient P for putting biological matrix in unit volume of sewagesValue 25kg/m3The total volume V of the matrix strengthening treatment system is 126m3(50.4m2×2.5m), and calculating the total input quantity W of the straws to be 3150kg according to the formula (2). Wherein the throwing frequency of the straws is 3 times per year, and the throwing amount of each time is 1/3 of the total amount, namely 1050 kg.
1.4 wetland absorption system parameters and construction requirements
The total area formula of the wetland absorption system is as follows:
Sp＝N*PA(3)
in the formula, SpIs the total area (m) of the wetland consumption system2) N is the highest daily number of people to eat; pAThe single dining tourist wetland construction area coefficient is 1-2.5 m2。
Considering that the maximum number of people N is 100, the peak of sewage load is concentrated in summer with vigorous growth of wetland plants and the other time is short and not high, the wetland construction area coefficient PATake 1m2. Calculating the total construction area S of the ecological wetland according to the formula (3)pIs 100m2。
The first-stage ecological wetland, the second-stage ecological wetland and the third-stage ecological wetland are arranged in a head-to-tail series mode and communicated through PVC (polyvinyl chloride) pipelines, a water inlet of each stage of ecological wetland is arranged at the bottom of one side wall, a water outlet is arranged at the top of the other side wall, and the water outlet and the water inlet of each pool are arranged along a diagonal line. The area ratio of the first-stage ecological wetland to the second-stage ecological wetland to the third-stage ecological wetland is 3:3:4, namely the first-stage ecological wetland is 30m230m of secondary ecological wetland2And the third-level ecological wetland is 40m2。
1.5 ecological wetland plant configuration requirements
The upper parts of the first-stage ecological wetland, the second-stage ecological wetland and the third-stage ecological wetland are respectively planted with saxifrage (large emergent aquatic plant), copper cash (small emergent aquatic plant) and foxtail algae (floating plant), and the planting density of the saxifrage is 8 plants/m225 copper cash plants/m2The leaf and stem of the watermifoil is 6kg/m2。
The kitchen sewage treatment system of the embodiment is used for monitoring the water quality of the sewage treatment effect of farmhouse happiness for 1 year, and the result is shown in table 1.
TABLE 1
As can be seen from Table 1, the average contents of pollutant indexes COD, total nitrogen, ammonia nitrogen, total phosphorus and animal and vegetable oil in the kitchen wastewater inlet water are respectively 114.9mg/L, 28.2mg/L, 24.8mg/L, 5.29mg/L and 13.1mg/L, the contents of each pollutant index COD, total nitrogen, ammonia nitrogen and total phosphorus in the treated outlet water are respectively 11.8mg/L, 3.7mg/L, 2.91mg/L, 0.48mg/L and 1.13mg/L, and the average removal rates of corresponding pollutants are respectively 89.3%, 86.6%, 87.9%, 90.8% and 91.3%. Overall, the treatment effect of COD, total nitrogen, ammonia nitrogen and total phosphorus pollutants in the engineering sewage of the embodiment reaches the level 1A standard of national urban sewage discharge, and the treatment effect of animal and vegetable oil pollutants in the sewage reaches the level 1B standard of national urban sewage discharge.
In conclusion, the invention has better removal effect on COD, total nitrogen and total phosphorus in the kitchen sewage, and especially has better treatment effect on animal and plant sump oil with higher content.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present invention should be included.
Claims (10)
1. The ecological treatment system for rural dispersive kitchen sewage is characterized by comprising a matrix strengthening treatment system and a wetland digestion system, wherein the matrix strengthening treatment system comprises 1 sedimentation tank and a plurality of biological matrix treatment units which are sequentially connected in series end to end through a communication pipeline, the sedimentation tank is communicated with a kitchen sewage discharge pipeline, a naturally degradable biological matrix filler is filled in the biological matrix treatment units, the matrix strengthening treatment system is connected with the wetland digestion system through the communication pipeline, the wetland digestion system is formed by communicating 3 or more than 3 ecological wetlands through pipelines, and aquatic plants are planted on the water surface of the ecological wetlands;
the total area of the matrix reinforcement treatment system is determined according to the following equation (1):
SA＝N*Vs*D/Hs(1)
in the formula, SAIs the total construction area (m) of the matrix strengthening treatment system2) (ii) a N is the highest daily number of people to eat; vs is the volume coefficient of the matrix strengthening processing system of a single tourist, and the value is 0.1-0.25 m3(ii) a D is the retention time of the sewage in the matrix strengthening treatment system; hs is the highest water level of the matrix strengthening treatment system;
the total area of the wetland digestion system is determined according to the following formula (3):
Sp＝N*PA(3)
in the formula, SpIs the total area (m) of the wetland consumption system2) N is the highest daily number of people to eat; pAThe single dining tourist wetland construction area coefficient is 1-2.5 m2。
2. The ecological treatment system for rural dispersive kitchen sewage according to claim 1, wherein the water inlets of the biological matrix treatment unit and the ecological wetland are arranged at the bottom of one side wall, and the water outlets of the biological matrix treatment unit and the ecological wetland are arranged at the top of the other side wall, so that the water outlets and the water inlets of the biological matrix treatment unit and the ecological wetland are arranged along a diagonal line.
3. The ecological treatment system for rural dispersive kitchen sewage according to claim 1, wherein a plurality of sockets are arranged on the wall of the biological matrix treatment unit, the sockets are uniformly distributed according to a rectangular array and correspondingly arranged corresponding to the sockets on the wall of the tank, and a blocking rod is arranged between the corresponding sockets.
4. The ecological treatment system for rural decentralized kitchen sewage according to claim 3, characterized in that the distance between adjacent sockets in the horizontal direction is 1.0-1.5 m, and the distance between adjacent sockets in the vertical direction is 0.2-0.8 m.
5. The treatment system for rural decentralized kitchen wastewater according to claim 1, wherein the sedimentation tank and the biological matrix treatment unit are regular closed tank bodies, and the bottom and the side wall of the tank body are of a watertight structure.
6. The treatment system for rural decentralized kitchen wastewater according to claim 1, wherein the ratio of the area of the sedimentation tank in the matrix enhanced treatment system to the total area of the biological matrix treatment units is 1: 4.
7. The ecological treatment system for rural distributed kitchen sewage according to claim 1, characterized in that the biological matrix filler is one or more mixed materials of straw, wheat straw and corn stalk.
8. The treatment system for rural decentralized kitchen wastewater according to claim 1, characterized in that the dosage of said bio-matrix filler is determined according to the following formula (2):
W＝V*Ps(2)
wherein W is the total amount (kg) of filler put in the biological matrix treatment unit; v is the total volume of the matrix strengthening treatment system; psThe unit volume sewage filler input coefficient is 20-30 Kg/m3。
9. The ecological treatment system for rural dispersive kitchen sewage according to claim 1, wherein the aquatic plants in the ecological wetland are sequentially configured as large emergent aquatic plants, small emergent aquatic plants and floating plants along the sewage gravity flow direction.
10. The ecological treatment system for rural dispersive kitchen sewage according to claim 1, wherein the planting area ratio of the large emergent aquatic plants, the small emergent aquatic plants and the floating plants is 3:3: 4.
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