CN110028150B - Modularization coupling sewage treatment system - Google Patents

Modularization coupling sewage treatment system Download PDF

Info

Publication number
CN110028150B
CN110028150B CN201910349187.9A CN201910349187A CN110028150B CN 110028150 B CN110028150 B CN 110028150B CN 201910349187 A CN201910349187 A CN 201910349187A CN 110028150 B CN110028150 B CN 110028150B
Authority
CN
China
Prior art keywords
multistage
pond
ecological
drop
water
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.)
Active
Application number
CN201910349187.9A
Other languages
Chinese (zh)
Other versions
CN110028150A (en
Inventor
常雅军
姚东瑞
刘晓静
崔键
杜凤凤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Botany of CAS
Original Assignee
Institute of Botany of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institute of Botany of CAS filed Critical Institute of Botany of CAS
Priority to CN201910349187.9A priority Critical patent/CN110028150B/en
Publication of CN110028150A publication Critical patent/CN110028150A/en
Priority to CA3077745A priority patent/CA3077745C/en
Application granted granted Critical
Publication of CN110028150B publication Critical patent/CN110028150B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • 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
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention relates to the field of sewage treatment, and provides a modular coupling sewage treatment system, wherein a treatment module of the system comprises two or three of a multistage ecological pond, a multistage drop water oxygen-charging type ecological ditch and a multistage drop dam; the coupling mode of the processing module is as follows: the multistage ecological pond and the multistage water-drop oxygen-charging ecological ditch are sequentially connected in series; or the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series; or the following steps: the multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series. The treatment system provided by the invention is formed by coupling two or three of a multistage ecological pond, a multistage drop water oxygen-charging type ecological ditch and a multistage drop dam, different coupling modes can be selected according to rural terrain and sewage quality in practical application, and the system provided by the invention does not need to add equipment such as aeration, stirring and the like, is simple and convenient to operate and easy to manage, has a stable water treatment effect and high purification efficiency, and has a wide application prospect.

Description

Modularization coupling sewage treatment system
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a modular coupling sewage treatment system.
Background
Agricultural non-point source pollution refers to pollution caused by that dissolved or solid pollutants, such as soil particles, nitrogen, phosphorus, heavy metals of pesticides, rural livestock manure, domestic garbage and other organic or inorganic substances in rural life and agricultural production activities, enter a receiving water body (rivers, lakes, reservoirs and gulfs) from unspecified regions through farmland surface runoff, farmland drainage and underground leakage under the action of rainfall and runoff scouring. Agricultural non-point source pollution has become the current major source of surface water pollution. Only 10% of 1.2 million tons of nitrogen used for grain production in the world is directly consumed by human beings, and most of unused nitrogen is dispersed into a wide environment and finally gathered into surface water to become a main non-point source pollution source. Agriculture is the most major driver for the discharge of excess nutrients into water. Studies have shown that about 58% and 40% of the total nitrogen and total phosphorus proportions in the lake tai are from agriculturally-produced non-point source pollution.
The ecological ditch is one of the important contents of agricultural non-point source pollution control as a means for intercepting nitrogen and phosphorus in farmland runoff, can effectively intercept and purify nitrogen and phosphorus pollutants in farmland drainage, reduces the risk that nitrogen and phosphorus are lost in the farmland and enter a water body, improves the self-purification capacity of the water body, and is more and more valued and popularized. However, the ecological ditch has the disadvantages of unstable purification effect and low purification efficiency in the application process.
Disclosure of Invention
In view of the above, the present invention provides a modular coupling sewage treatment system which can be suitably combined according to the quality of sewage and the local topography, and the system provided by the present invention is suitable for the treatment of rural domestic sewage and agricultural non-point source sewage, and ensures the stability and high efficiency of the purification effect.
In order to achieve the above object, the present invention provides the following technical solutions:
a modular coupling sewage treatment system, the treatment module of the system comprises two or three of a multi-stage ecological pond, a multi-stage drop water oxygen-charging type ecological ditch and a multi-stage drop dam;
the coupling mode of the processing module is as follows:
the multistage ecological pond and the multistage water-drop oxygen-charging ecological ditch are sequentially connected in series;
or the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series;
or the following steps: the multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series.
Preferably, the multistage ecological pond comprises a contact oxidation pond, a biological stabilization pond and a submerged culvert oxidation pond which are communicated in sequence.
Preferably, the filler in the contact oxidation pond is modified loofah;
emergent aquatic plants are planted in the biostabilization pond; the carrier of the emergent aquatic plant is a box-type ecological floating bed; the filler in the box-type ecological floating bed is modified loofah sponge;
submerged plants are planted in the submerged culvert oxygen pond.
Preferably, the filling amount of the filler in the contact oxidation pond is 40-60% of the volume of the contact oxidation pond.
Preferably, the preparation method of the modified loofah sponge comprises the following steps:
and soaking the loofah sponge in an alkaline solution for 20-40 min, taking out, and washing to be neutral to obtain the modified loofah sponge.
Preferably, the multistage drop water oxygenation type ecological ditch comprises a plurality of ecological ditches which are connected in a stepped manner from high to low in sequence; each ecological ditch is nested with the next ecological ditch through the buckle at the bottom of the tail end.
Preferably, cobblestones are laid in the multistage water-dropping oxygen-charging ecological ditch, and the thickness of the cobblestones laid in a single ecological ditch is 4-6 cm; the diameter of the cobblestones is 2-5 cm.
Preferably, the multistage drop dam comprises a plurality of drop steps, and the height of each drop step is 200-300 mm.
Preferably, the system further comprises a sewage storage tank and a constant flow pump; and sewage in the sewage storage tank enters the treatment module through the constant flow pump.
The invention provides a modularized coupling sewage treatment system, wherein a treatment module of the system comprises two or three of a multistage drop water oxygen-charging type ecological ditch, a multistage ecological pond and a multistage drop dam; the coupling mode of the processing module is as follows: the multistage ecological pond and the multistage water-drop oxygen-charging ecological ditch are sequentially connected in series; or the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series; or the following steps: the multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series. The treatment system provided by the invention is formed by coupling two or three of a multistage drop water oxygenation type ecological ditch, a multistage ecological pond and a multistage drop dam, different coupling modes can be selected according to rural terrain and sewage quality in practical application, and equipment such as aeration, stirring and the like is not required to be added in the system provided by the invention, so that the reduction of the number of devices for aeration, stirring and the like is realizedThe sewage treatment equipment and the operation cost are high, the operation is simple and convenient, the management is easy, and the method is very suitable for the rural sewage treatment concept; the system provided by the invention has stable water treatment effect and high purification efficiency, is suitable for treatment of rural domestic sewage and agricultural non-point source sewage, is expected to be applied to repair and treatment of town sewage and lake eutrophic water bodies in the future, and has wide application prospect. The results of the examples show that COD and ammonia Nitrogen (NH) in the effluent water of rural sewage treatment by using the system of the invention4 +And the-N), the Total Nitrogen (TN) and the Total Phosphorus (TP) have higher removal rate.
Drawings
FIG. 1 is a schematic structural diagram of a multi-stage ecological pond in the invention;
FIG. 2 is a schematic view of the structure of the multistage drop-aeration ecological ditch of the present invention;
FIG. 3 is a schematic structural view of a 4-stage drop-aeration ecological ditch of the present invention;
fig. 4 is a schematic structural view of a multistage drop dam according to the present invention;
FIG. 5 is a schematic structural diagram of a multi-stage ecological pond and multi-stage water-drop oxygen-charging ecological ditch coupling system according to the present invention;
fig. 6 is a schematic structural diagram of a multistage drop dam, a multistage ecological pond and a multistage drop water oxygen-charging ecological ditch coupling system according to the present invention;
FIG. 7 is a schematic structural diagram of a multistage drop aeration ecological ditch, a multistage ecological pond and a multistage drop dam coupling system according to the present invention;
in FIGS. 5 to 7: 1-a multistage ecological pond, 2-a multistage drop water oxygenation type ecological ditch, 3-a multistage drop dam, 4-a sewage storage pool and 5-a constant flow pump.
Detailed Description
The invention provides a modularized coupling sewage treatment system, wherein a treatment module of the system comprises two or three of a multistage ecological pond, a multistage drop water oxygen-charging type ecological ditch and a multistage drop dam;
the coupling mode of the processing module is as follows:
the multistage ecological pond and the multistage water-drop oxygen-charging ecological ditch are sequentially connected in series;
or the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series;
or the following steps: the multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series.
The treatment module of the system comprises a multi-stage ecological pond. In the invention, the multistage ecological pond preferably comprises a contact oxidation pond, a biological stabilization pond and a submerged culvert oxidation pond which are sequentially communicated; the filler in the contact oxidation pond is preferably modified loofah sponge; the filling volume of the modified loofah sponge in the contact oxidation pond is preferably 40-60% of the volume of the contact oxidation pond, and more preferably 50%.
In the present invention, the preparation method of the modified loofah preferably comprises the following steps: and soaking the loofah sponge in an alkaline solution for 20-40 min, taking out, and washing to be neutral to obtain the modified loofah sponge. In the invention, the alkaline solution is preferably sodium hydroxide solution, and the invention has no special requirement on the dosage of the alkaline solution and can completely soak the loofah; the mass fraction of the alkaline solution is preferably 2-10%, and specifically can be 2%, 5% and 10%; the soaking temperature is preferably 25 ℃, the soaking time is preferably 20-40 min, and more preferably 30 min; in a specific embodiment of the present invention, the soaking is preferably performed under a constant temperature water bath condition (25 ℃), and if the loofah sponge floats up, a weight can be placed to press it down to be completely immersed. And taking out after soaking, washing with a large amount of tap water, and then rinsing with deionized water until the rinsing liquid is neutral.
The natural loofah sponge is a natural slow-release filler widely existing in nature, the loofah sponge is prepared into a super-hydrophobic material through modification treatment, the hydroxyl is reduced to reduce the hydrophilicity, the loofah sponge is prepared into a slow-release filler capable of continuously supplying a carbon source, the service life of the loofah sponge in water is prolonged, the film forming performance of the loofah sponge filler can be improved, the loofah sponge filler is easy to form a film, the two functions of a carrier for forming the film by microorganisms and providing the carbon source required by denitrification nitrogen removal are taken into consideration, and the problem of insufficient carbon source in the process of nitrogen and phosphorus removal of large-area domestic sewage and non-point source pollutants can be; meanwhile, the modified loofah sponge filler is not only an excellent carrier for water microorganisms, but also an efficient adsorption material for pollutants such as nitrogen and phosphorus in water, the degradation effect of the microorganisms and the adsorption effect of the modified loofah sponge filler can reach a dynamic adsorption-desorption mode, and the defect that the pollutants cannot be effectively intercepted after the adsorption saturation of a common adsorption material is effectively overcome; moreover, the modified loofah sponge filler used in the invention has the characteristics of convenient material acquisition, low price, environmental protection and no pollution.
The modified loofah sponge filler is used for providing a carrier for biofilm culturing of microorganisms in the contact oxidation pond, so that efficient interception and microbial degradation of organic pollutants in sewage are realized.
In the present invention, emergent aquatic plants are preferably planted in the biostabilization pond; the carrier of the emergent aquatic plant is preferably a box-type ecological floating bed; the filler in the box-type ecological floating bed is preferably modified loofah sponge, and the filling rate is 50%; the preparation method of the modified loofah sponge is the same as the scheme, and the description is omitted, so that the box-type ecological floating bed has no special requirements, and can be prepared by using the box-type ecological floating bed well known by the technical personnel in the field; the method has no special requirements on the species of the emergent aquatic plants, and the emergent aquatic plants suitable for local growth can be planted; in a particular embodiment of the invention, locally grown waterfowl may also be raised in the biostabilization pond. In the biostabilization pond, the modified loofah sponge and the aquatic plants are utilized in a combined manner, so that the defects and seasonal problems of plants in a single plant purification method are overcome, the stability of the sewage treatment effect is ensured, an artificial ecosystem is formed by planting the aquatic plants in the pond and carrying out aquatic product and waterfowl culture, and organic pollutants entering the sewage in the pond are degraded and transformed by the material migration and transformation and the step-by-step energy transfer and transformation of a plurality of food chains in the biostabilization pond under the promotion of solar energy (energy provided by solar radiation).
In the invention, submerged plants are planted in the submerged culvert oxygen pond. The invention has no special requirements on the types of the submerged plants, and the submerged plants suitable for local growth can be planted. In the submerged culvert oxygen pond, an ecological food chain system is constructed by utilizing the photosynthesis and respiration of submerged plants, so that the deep purification of water quality is realized.
In the present invention, the contact oxidation pond, the biostabilization pond and the submerged culvert oxygen pond are in communication with each other, and in a specific embodiment of the present invention, the contact oxidation pond, the biostabilization pond and the submerged culvert oxygen pond are preferably separated by a partition plate; the height of the upper part of a partition plate between the contact oxidation pond and the biological stabilization pond is parallel to the height of the periphery of the multi-stage ecological pond, and the bottom of the partition plate is provided with an opening for water to pass through, so that the contact oxidation pond, the slow release filler in the biological stabilization pond and the box-type floating bed aquatic plants are ensured to be fully contacted with the polluted water body; the height of the opening is preferably 20-30 cm; the height of the partition plate between the biological stabilization pond and the submerged culvert oxygen pond is 10-20 cm lower than the height of the periphery of the multi-stage ecological pond, so that water in the biological stabilization pond flows through the partition plate and enters the submerged culvert oxygen pond, and impurities such as particles entering the submerged culvert oxygen pond can be reduced. The present invention has no special requirements for the specific dimensions of the contact oxidation pond, the biostabilization pond and the submerged culvert oxygen pond, and is preferably adjusted according to the water treatment capacity and the geographical position, as a specific embodiment of the present invention, the dimensions and the structure of the multistage ecological pond are as shown in fig. 1, the contact oxidation pond, the biostabilization pond and the submerged culvert oxygen pond are arranged in the order from left to right in fig. 1, and the arrows in the figure indicate the water flow direction.
The treatment module of the system comprises a multistage drop water oxygenation type ecological ditch. In the invention, the multistage drop water oxygenation type ecological ditch comprises a plurality of ecological ditches which are connected in a stepped manner from high to low in sequence; every ecological irrigation canals and ditches specifically are open cuboid form, and the design of terminal bottom has the buckle for with next ecological irrigation canals and ditches nestification, the connected mode specifically is: the right bottom of the first-stage ecological ditch is connected with the left top of the second-stage ecological ditch through a buckle, the right bottom of the second-stage ecological ditch is connected with the left top of the third-stage ecological ditch through a buckle, and the rest is done in sequence; the slope of each ecological ditch is 0 degrees, namely the ecological ditches are horizontally arranged; in the invention, cobblestones are preferably paved in the multistage drop water oxygenation type ecological ditch; the thickness of the cobblestones laid in the single ecological ditch is preferably 4-6 cm, and more preferably 5 cm; the diameter of the cobblestones is preferably 2-5 cm, and more preferably 3-4 cm. The invention is convenient for the biological membrane to propagate and grow on cobblestones through multi-stage drop water oxygenation. The invention also preferably plants aquatic plants at the joint of the two ecological ditches and the place with slower water flow, thus forming drop oxygenation and ecological ditch multifunction, strengthening purification effect, beautifying environment and increasing economic benefit.
In the invention, the multistage drop water oxygen-filling ecological ditch is preferably processed by stainless steel plates, the length, width and height of each ecological ditch and the stage number of the multistage drop water oxygen-filling ecological ditch have no special requirements, and the ecological ditch is designed according to water treatment capacity and water quality. As a specific embodiment of the invention, the specific dimensions of the multistage drop water oxygenation ecological ditch are shown in fig. 2, the length of a single ecological ditch is 1000mm, the width is 800mm, the height is 500mm, the ecological ditch is an open cuboid, and the height of the stainless steel plate at the joint of two ecological ditches is preferably lower than that of the stainless steel plates on the other three sides, so as to facilitate water flow; in the specific embodiment of the present invention, it is preferable to perform scaling and correcting the water flow condition using Fr number (froude number) based on the size in fig. 2; when the number of stages of the multistage drop water-oxygen-filling ecological ditch is 4, the structural schematic diagram is shown in fig. 3.
The multi-stage drop oxygen-charging type ecological ditch is an unpowered aeration system, can realize the supply of dissolved oxygen in different downstream ditch sections without the aid of water flow power, is beneficial to removing pollutants, enhancing the growth and metabolism of channel plants, strengthening the interception effects of N, P such as removal, percolation and the like, and can greatly reduce energy consumption.
The processing module of the system comprises a multistage drop dam; the multistage drop dam comprises a plurality of drop steps, the height of each drop step is preferably 200-300 mm, more preferably 250mm, and the width of each drop step is preferably 1000 mm; the baffles are preferably arranged on two sides of the drop step, the height of the baffles on two sides of the multistage drop dam is not specially required, and water flow can be prevented from overflowing. In the present invention, the total number of stages of the multistage drop dam is preferably calculated by formula I:
n2＝(C0－Cn)/Cxformula I;
in the formula I, C0As concentration of untreated water contaminants, CnTo estimate post-decontamination concentration, CxThe removal rate of the single-stage drop step is shown, and n is the number of the drop dam.
In the invention, the multistage drop dam is preferably formed by processing stainless steel plates, in a specific embodiment of the invention, a plurality of drop units are preferably processed by using the stainless steel plates, each drop unit comprises 3-4 stages of drop steps, and the drop units are vertically nested by steep ground or ground supports through buckles to form the drop dam with required stages; the difficulty of processing and transportation can be reduced by processing the water drop units and then nesting the water drop units. In the specific embodiment of the invention, the multistage drop dam can be built according to rural topography, and flows through the drop steps under the action of the gravity of water, so that the multistage drop oxygen enrichment effect is achieved. As an embodiment of the present invention, the size of the multistage drop dam is as shown in fig. 4.
The water treatment module of the system provided by the invention comprises two or three of the multistage ecological pond, the multistage drop water oxygen-filling type ecological ditch and the multistage drop dam in the scheme; the coupling modes of the processing module include three, specifically:
the first method comprises the following steps: the multistage ecological pond and the multistage drop water oxygen-filling ecological ditch are sequentially connected in series, namely the multistage ecological pond is arranged in front of the multistage drop water oxygen-filling ecological ditch, and the structural schematic diagram is shown in fig. 5. In the coupling mode, a submerged culvert of the multistage ecological pond is communicated with the multistage drop-aeration ecological ditch, and a water outlet is formed in the side surface of the submerged culvert and the side surface of the oxygen pond so as to supply water flow to flow out and extend the multistage drop-aeration ecological ditch to flow downstream. In the coupling mode, the multistage ecological pond has the functions of efficiently purifying water quality and blocking partial nitrogen and phosphorus, beautifying rural ecological environment and improving the water quality condition of rural circulating water, and can also be used as a regulating pond to regulate and control water quantity change, so that the problems that the regulating pond is lacked in a traditional ecological ditch system, the fluctuation of the water quantity of sewage in modern villages is large, the surface runoff is increased due to normal precipitation, and nutrient elements such as nitrogen and phosphorus overflow to different ditch sections of an ecological ditch to cause poor treatment effect and the like are solved. In the invention, the coupling mode is suitable for eutrophic water with large water quantity fluctuation and water quality belonging to the water quality of surface water V-type water.
And the second method comprises the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series, namely the multistage drop dam is arranged in front in the first coupling mode, and the structural schematic diagram is shown in fig. 6. In the coupling mode, the multistage drop dam is communicated with the contact oxidation pond of the multistage ecological pond, water flows down from the multistage drop dam under the action of gravity to perform sufficient oxygen enrichment, then flows into the multistage ecological pond to perform nitrogen and phosphorus removal, then flows out from the multistage ecological pond to enter the multistage drop oxygen-charging type ecological ditch to perform further contact oxidation, and organic matters in sewage are deeply removed. In the invention, the coupling mode is suitable for mountain and rural areas with steep terrain, water can be sunk down, dissolved oxygen in water is increased, meanwhile, water flow is sunk into the ecological ditch, and the water flow is guided by the multi-stage water-sinking and oxygen-filling type ecological ditch after being intercepted and degraded by the multi-stage ecological pond.
And the third is that: the multistage water-dropping oxygen-charging ecological ditch, the multistage ecological pond and the multistage water-dropping dam are sequentially connected in series, and the structural schematic diagram is shown in fig. 7. In the coupling mode, the multistage drop water oxygen-filling type ecological ditch is communicated with the contact oxidation pond of the multistage ecological pond, the submerged culvert oxygen pond of the multistage ecological pond is communicated with the multistage drop dam, water flow is subjected to contact oxidation through the multistage drop water oxygen-filling type ecological ditch to remove organic matters in sewage, then the water flow flows into the multistage ecological pond to remove nitrogen and phosphorus, and then the water flow flows out of the multistage ecological pond to enter the multistage drop dam to further enrich oxygen and remove the organic matters. In the invention, the coupling mode is suitable for the condition that the water quantity is not changed greatly but the field is limited, firstly, the ecological ditch is utilized for water flow guiding and primary purification, and then the water flow is intercepted and degraded by a multi-stage ecological pond and falls down by a multi-stage water falling dam in sequence to increase the dissolved oxygen in the water body and the visual aesthetic feeling.
In the scheme, when the modules are connected in series, the adjacent modules are preferably connected through the buckles, and the invention has no special requirements on the structures of the buckles and can realize the connection.
The invention provides three coupling modes, different coupling modes can be selected according to rural terrain and sewage quality in practical application, and the system provided by the invention does not need to add equipment such as aeration and stirring, reduces sewage treatment equipment and operating cost, is simple and convenient to operate and easy to manage, and is very suitable for rural sewage treatment concept.
In the present invention, the system preferably further comprises a sewage reservoir and a constant flow pump; and sewage in the sewage storage tank enters the treatment module through the constant flow pump.
The invention has no special requirements on the specific application method of the system in the scheme, firstly, sewage is stored in a sewage storage tank, and the sewage is conveyed to the system by using a constant flow pump and is enabled to sequentially pass through the treatment module, and in the specific embodiment of the invention, the system preferably runs in a continuous running mode; the invention has no special requirements on the hydraulic retention time, daily treatment capacity and the like of the sewage in the system, and can be adjusted according to the sewage quality and the size of each module in the specific embodiment.
The embodiments of the present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The multistage ecological pond and the multistage drop water oxygen-filling type ecological ditch are sequentially connected in series for sewage treatment, and the schematic structural diagram is shown in fig. 5. The multifunctional ecological pond sequentially comprises a contact oxidation pond, a biological stabilization pond and a submerged culvert oxygen pond, wherein the size of each pond is 1.0m in height, 1.0m in width and 1.0m in length, the height of a partition plate between the contact oxidation pond and the biological stabilization pond is flush with the height of the periphery of the multistage ecological pond, an opening with the height of 25cm is formed below the partition plate, the heights of the partition plates of the biological stabilization pond and the submerged culvert oxygen pond are 90cm, and the specific sizes are shown in figure 1;
the number of stages of the multistage drop oxygen-charging ecological ditch is 4, each ditch is an open cuboid which is processed by stainless steel plates and has the length of 1000mm, the width of 800mm and the height of 500mm, the four ditches are nested from top to bottom to form the 4-stage drop oxygen-charging ecological ditch, and the specific size is shown in figure 2.
The system is used for treating rural domestic sewage, the sewage is stored in a sewage storage pool, the sewage is extracted into a multistage ecological pond by a constant flow pump, and the sewage flows into a multistage drop oxygenation type ecological ditch after passing through a contact oxidation pond, a biological stabilization pond and a submerged culvert oxygen pond in sequence.
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 186 mg.L-1TN of 54.53 mg. L-1﹑NH4 +-N is 33.37 mg.L-1TP of 11.20 mg. L-1When the influent load was 3000L/h, the effluent quality was analyzed after 7 days, and the results are shown in Table 1, which indicates that the COD removal rate of the wastewater was 82.44%, the TN removal rate was 81.42%, and the NH removal rate was 81.42% after the treatment with the system of the present example4 +The removal rate of-N was 74.83%, and the removal rate of TP was 81.25%.
Table 1. Water quality detection results of inlet and outlet in pond-ecological ditch coupling system
Figure BDA0002043373910000091
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 207.67 mg.L-1And TN is 60.80 mg.L-1﹑NH4 +-N is 45.23 mg.L-1TP of 14.87 mg.L-1When the water inlet load was 6000L/h, the effluent quality was analyzed 7 days later, and the results are shown in Table 2, which indicates that the COD removal rate of the wastewater was 79.45%, the TN removal rate was 79.44%, and the NH content of the wastewater was 79.44% after the wastewater was treated by the system of the present example4 +The removal rate of-N was 73.77% and the removal rate of TP was 80.04%.
Table 2. Water quality detection results of inlet and outlet in pond-ecological ditch coupling system
Figure BDA0002043373910000092
Example 2
The multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series for sewage treatment, and the structural schematic diagram is shown in fig. 6, wherein the multistage drop dam has the stage number of 3, the step height of 200mm, the width of 1000mm, the total height of 600mm, and the specific size is shown in fig. 4; the setting conditions of the sizes and the like of the multistage ecological pond and the multistage water-dropping oxygen-charging type ecological ditch are consistent with those of the embodiment 1;
the system is used for treating rural domestic sewage, the sewage is stored into a sewage storage pool, the sewage is extracted into a multistage drop dam by a constant flow pump, and the sewage flows into a multistage drop oxygen-charging type ecological ditch after passing through a contact oxidation pond, a biological stabilization pond and a submerged culvert oxygen pond of a multistage ecological pond in sequence.
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 211.33 mg.L-1And TN is 56.13 mg.L-1﹑NH4 +-N is 39.67 mg.L-1TP of 18.00 mg. L-1When the influent load was 3000L/h, the effluent quality was analyzed after 7 days, and the results are shown in Table 3, which indicates that the COD removal rate of the wastewater was 90.22%, TN removal rate was 82.07%, and NH was removed after the treatment with the system of this example4 +The removal rate of-N was 91.60% and the removal rate of TP was 81.48%.
Table 3. Water quality detection results of inlet and outlet in drop dam-pond-ecological ditch coupling system
Figure BDA0002043373910000101
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 192.00 mg.L-1And TN is 47.30 mg.L-1﹑NH4 +-N is 35.43 mg.L-1TP of 17.27 mg. L-1The results of the analyses of the effluent quality 7 days after the inlet load was 6000L/h are shown in Table 4, and it is understood that the system of the present exampleAfter the system treatment, the removal rate of COD in the sewage is 89.06%, the removal rate of TN is 80.06%, and NH is4 +The removal rate of-N was 90.31%, and the removal rate of TP was 80.70%.
Table 4. Water quality detection results of inlet and outlet in drop dam-pond-ecological ditch coupling system
Figure BDA0002043373910000102
Example 3
The multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series for sewage treatment, and the schematic structural diagram is shown in FIG. 7; the setting parameters of the multistage water-dropping oxygen-charging ecological ditch, the multistage ecological pond, the multistage water-dropping dam, such as the size, are consistent with those of the embodiment 2.
The system is used for treating rural domestic sewage, the sewage is stored into a sewage storage pool, the sewage is extracted into a multistage drop water oxygen-charging type ecological ditch by a constant flow pump, and the sewage flows into a multistage drop dam after passing through a contact oxidation pond, a biological stabilization pond and a submerged culvert oxygen pond of a multistage ecological pond in sequence.
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 175.86 mg.L-1And TN is 43.97 mg.L-1﹑NH4 +N is 29.63 mg.L-1TP of 15.30 mg. L-1When the influent load was 3000L/h, the effluent quality was analyzed after 7 days, and the results are shown in Table 5, which indicates that the COD removal rate of the wastewater was 84.41%, the TN removal rate was 81.42%, and the NH removal rate was 81.42% after the treatment with the system of this example4 +The removal rate of-N was 87.74%, and the removal rate of TP was 82.35%.
Table 5 Water quality detection results of inlet and outlet in ecological ditch-pond-drop dam coupling system
Figure BDA0002043373910000111
When the operation mode of the coupling system is continuous operation, the COD of the inlet water quality is 161.67mg·L-1And TN is 41.39 mg.L-1﹑NH4 +-N is 28.40 mg.L-1TP of 15.97 mg. L-1When the influent load was 3000L/h, the effluent quality was analyzed after 7 days, and the results are shown in Table 6, which indicates that the COD removal rate of the wastewater was 83.09%, the TN removal rate was 41.39%, and the NH removal rate was 41.39% after the treatment with the system of this example4 +The removal rate of-N was 86.03%, and the removal rate of TP was 82.88%.
Table 6. Water quality detection results of inlet and outlet in ecological ditch-pond-drop dam coupling system
Figure BDA0002043373910000112
The embodiment shows that the system provided by the invention does not need to add equipment such as aeration and stirring, is simple and convenient to operate, is easy to manage, is very suitable for rural sewage treatment concepts, and has the advantages of stable water treatment effect, high purification efficiency and wide application prospect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. A modular coupling sewage treatment system is characterized in that a treatment module of the system consists of two or three of a multistage ecological pond, a multistage drop water oxygen-charging type ecological ditch and a multistage drop dam;
the coupling mode of the processing module is as follows:
the multistage ecological pond and the multistage water-drop oxygen-charging ecological ditch are sequentially connected in series;
or the following steps: the multistage drop dam, the multistage ecological pond and the multistage drop water oxygen-charging type ecological ditch are sequentially connected in series;
or the following steps: the multistage drop water oxygen-charging type ecological ditch, the multistage ecological pond and the multistage drop dam are sequentially connected in series;
the multistage ecological pond comprises a contact oxidation pond, a biological stabilization pond and a submerged culvert oxidation pond which are sequentially communicated; the filler in the contact oxidation pond is modified loofah sponge; emergent aquatic plants are planted in the biostabilization pond; the carrier of the emergent aquatic plant is a box-type ecological floating bed; the filler in the box-type ecological floating bed is modified loofah sponge; the filling amount of the filler in the contact oxidation pond is 40-60% of the volume of the contact oxidation pond;
the contact oxidation pond, the biological stabilization pond and the submerged culvert oxygen pond are separated by a partition plate; the height of the upper part of a partition plate between the contact oxidation pond and the biological stabilization pond is flush with the height of the periphery of the multi-stage ecological pond, and the bottom of the partition plate is provided with an opening for water to pass through; the height of a partition plate between the biological stabilization pond and the submerged culvert oxygen pond is 10-20 cm lower than the height of the periphery of the multi-stage ecological pond;
the preparation method of the modified loofah sponge comprises the following steps: soaking the loofah sponge in an alkaline solution for 20-40 min, taking out, and washing to be neutral to obtain modified loofah sponge;
the slope of a single ecological ditch in the multistage drop oxygen-charging ecological ditch is 0 degree.
2. The system of claim 1, wherein the multistage drop oxygenated ecological ditch comprises a plurality of ecological ditches connected in a stepped manner in sequence from high to low; each ecological ditch is nested with the next ecological ditch through the buckle at the bottom of the tail end.
3. The system according to claim 1, wherein cobblestones are laid in the multistage drop water oxygenation ecological ditch, and the thickness of the cobblestones laid in a single ecological ditch is 4-6 cm; the diameter of the cobblestones is 2-5 cm.
4. The system of claim 1, wherein the multistage drop dam comprises a plurality of drop steps, and the height of each drop step is 200-300 mm.
5. The system of claim 1, further comprising a waste water holding tank and a constant flow pump; and sewage in the sewage storage tank enters the treatment module through the constant flow pump.
CN201910349187.9A 2019-04-28 2019-04-28 Modularization coupling sewage treatment system Active CN110028150B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201910349187.9A CN110028150B (en) 2019-04-28 2019-04-28 Modularization coupling sewage treatment system
CA3077745A CA3077745C (en) 2019-04-28 2020-04-01 Modularly coupled wastewater treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910349187.9A CN110028150B (en) 2019-04-28 2019-04-28 Modularization coupling sewage treatment system

Publications (2)

Publication Number Publication Date
CN110028150A CN110028150A (en) 2019-07-19
CN110028150B true CN110028150B (en) 2020-11-24

Family

ID=67240523

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910349187.9A Active CN110028150B (en) 2019-04-28 2019-04-28 Modularization coupling sewage treatment system

Country Status (2)

Country Link
CN (1) CN110028150B (en)
CA (1) CA3077745C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110639942A (en) * 2019-09-12 2020-01-03 中国电建集团江西省电力建设有限公司 Ecological system and method for restoring polluted soil
CN112093978A (en) * 2020-09-08 2020-12-18 中国科学院南京地理与湖泊研究所 Landscape lake moisturizing purification structure
CN112358052A (en) * 2020-11-30 2021-02-12 北京檀安生物科技有限公司 Immobilized carrier microorganism stabilization pond and treatment process thereof
CN112320956A (en) * 2020-12-02 2021-02-05 天津大学 Series-type multistage drop oxygenation small-sized sewage treatment system
CN112726772A (en) * 2021-01-07 2021-04-30 江苏龙腾工程设计股份有限公司 Wet pond system for sponge city and method for purifying rainwater by using wet pond system
CN113800641A (en) * 2021-09-05 2021-12-17 桂林理工大学 Agricultural drainage basin non-point source pollution reduction and recycling ecological management design method mixed with domestic sewage
CN114477448A (en) * 2022-02-15 2022-05-13 国能朗新明环保科技有限公司 Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process
CN115304164A (en) * 2022-08-08 2022-11-08 广东省科学院生态环境与土壤研究所 Ecological restoration method for comprehensively treating farmland non-point source pollution
CN117263393B (en) * 2023-11-21 2024-02-09 广州市藏绿环保工程技术有限公司 Ecological system and integration process for treating tail water of compound enhanced aquaculture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201003006Y (en) * 2007-02-13 2008-01-09 山东大学 Loofah carrier biological contacting oxidation bed
CN102351376A (en) * 2011-07-08 2012-02-15 中国科学院水生生物研究所 Riverbank multiple pond wetland waste sewage treatment method and device
CN204675969U (en) * 2015-05-21 2015-09-30 武汉大学 A kind of multistage drop oxygenation formula irrigation canals and ditches are communicated with ecological pond rural sewage treatment system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5316625A (en) * 1993-06-03 1994-05-31 Crown Iron Works Company Apparatus for separating a partially miscible solvent from water
WO2005115598A2 (en) * 2004-05-25 2005-12-08 The Board Of Trustees Of The University Of Arkansas System and method for dissolving gases in liquids
CN101492226A (en) * 2009-03-04 2009-07-29 东南大学 Combined small-sized sewage water dephosphorization denitrification method for anaerobic-ecological pond-ecological ditch
CN103395930A (en) * 2013-07-31 2013-11-20 武汉大学 Ecological slope protection type sewage land infiltration system and ecological slope protection type sewage land infiltration method
CN203451288U (en) * 2013-08-30 2014-02-26 武汉大学 Compound ecological ditch for treating surface source sewage in village
CN105084643B (en) * 2015-07-15 2017-05-24 同济大学 Water quality in-situ pre-treatment method in water source region
CN105502822A (en) * 2015-12-21 2016-04-20 南京领先环保技术股份有限公司 Drop-aeration water treatment system
CN107721079A (en) * 2017-11-11 2018-02-23 安徽水韵环保股份有限公司 A kind of urban river ecological is administered and repair system
CN107720973B (en) * 2017-11-22 2024-03-15 上海禾元环保集团有限公司 Sewage treatment plant tail water constructed wetland treatment system
CN108911158B (en) * 2018-09-28 2019-04-12 江西省科学院 A kind of rural domestic sewage treatment system based on small watershed form

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201003006Y (en) * 2007-02-13 2008-01-09 山东大学 Loofah carrier biological contacting oxidation bed
CN102351376A (en) * 2011-07-08 2012-02-15 中国科学院水生生物研究所 Riverbank multiple pond wetland waste sewage treatment method and device
CN204675969U (en) * 2015-05-21 2015-09-30 武汉大学 A kind of multistage drop oxygenation formula irrigation canals and ditches are communicated with ecological pond rural sewage treatment system

Also Published As

Publication number Publication date
CA3077745A1 (en) 2020-10-28
CA3077745C (en) 2023-03-21
CN110028150A (en) 2019-07-19

Similar Documents

Publication Publication Date Title
CN110028150B (en) Modularization coupling sewage treatment system
CN108238703A (en) A kind of system that aquiculture using recirculated water is carried out using biofilter-artificial swamp
CN103819005A (en) Artificial wetland processing system constructed by ecological bags
CN100390079C (en) Photoayhthetic carbon-sequestration ecological denitrogenation process
CN108503035A (en) A kind of staged composite ecological floating island for micropollutant water processing
CN107585868B (en) Water body deep purification system
CN111072219A (en) Method for controlling eutrophication of wetland pre-pond
CN208362108U (en) A kind of system carrying out aquiculture using recirculated water using biofilter-artificial swamp
CN110078320A (en) Villages and small towns sewage unpowered biological ecological treatment apparatus and the sewage disposal system comprising it
CN105236687A (en) Sewage treatment device and method for self-cleaning type micro-aeration vertical baffled wetland
CN209759238U (en) System for adopt combination technology to purify lake water
CN105060648B (en) Industrial circulating water fish culture denitrogenation Zero discharging system
CN103693818B (en) Coking wastewater biochemical treatment and sedimentation tank
CN113772817B (en) Pond weir wetland system for strengthening farmland water-returning nitrogen and phosphorus removal
CN211999023U (en) Two-stage sewage purification tank
CN214654277U (en) In-situ sewage interception treatment system in river channel
CN211770568U (en) Stepped artificial wetland system
CN209974535U (en) Artificial wetland sewage treatment device for northern cold regions
CN209923026U (en) Water quality purification microbial ecological unit and water quality purification microbial ecological system
CN113307424A (en) Lake circulating water supply and activating system for purifying water quality based on physicochemical method
CN113387504B (en) Farmland water drain purifying system combining ecological floating bed and iron-carbon micro-electrolysis
CN216106514U (en) Sewage treatment system based on AO-MBBR-inductive coupling filtering pond
CN212151979U (en) Zero-discharge treatment system for aquaculture sewage
CN108821449A (en) A kind of method and system suitable for domestic sewage in rural areas advanced treating
CN211999385U (en) Multistage sewage purification pond

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
GR01 Patent grant
GR01 Patent grant