Device for purifying domestic sewage by coupling active materials with emergent aquatic plants

Abstract

The utility model discloses an active material coupled emergent aquatic plant domestic sewage purification device which comprises a regulating tank, a sewage treatment tank and a water guide pipeline system, and the regulating tank is used for regulating and balancing sewage flow; active materials and emergent aquatic plants are arranged in the sewage treatment tank, and the sewage treatment tank comprises a first treatment tank, a second treatment tank and a third treatment tank; and the water guide pipeline system is used for realizing internal communication of the device. Wherein the device realizes two operation modes through the water guide pipeline system, namely a first mode in which the first treatment tank, the second treatment tank and the third treatment tank are sequentially arranged in series; and a second mode in which the first, second and third treatment pools are arranged in parallel. By the adoption of the device, nitrogen and phosphorus removal can be achieved by coupling the active materials with the emergent aquatic plants so as to deeply purify sewage, the two operation modes can be switched according to the population scale so as to meet different sewage treatment requirements, and in addition, the domestic sewage purification device is small in occupied area, simple in structure and low in design cost and has good application and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a device for purifying domestic sewage using active materials coupled with emergent plants. Background Art

[0002] Rural domestic sewage treatment is crucial to improving the rural living environment. The existing rural domestic sewage treatment technologies mainly include biochemical treatment technology and ecological treatment technology. Biochemical treatment technology requires unified collection and centralized treatment of sewage, and has the problems of high construction and operation costs and poor resistance to hydraulic load impact. Existing ecological treatment technologies such as artificial wetlands and land infiltration have the problems of large footprint, easy clogging of packing beds and poor nitrogen and phosphorus removal effects. Therefore, rural areas generally lack effective domestic sewage treatment facilities, and the operation and maintenance of sewage treatment facilities in rural areas face severe challenges. It is urgent to develop a rural decentralized domestic sewage deep treatment technology that occupies a small area, has low infrastructure and operating costs, and is easy to operate and maintain. Utility Model Content

[0003] In order to overcome the technical problems described in the above-mentioned prior art, the purpose of the present application is to provide a device for purifying domestic sewage by coupling active materials with emergent plants.

[0004] The present invention discloses a device for purifying domestic sewage by coupling an active material with an emergent plant, comprising:

[0005] Regulating tanks, which are used to regulate and balance sewage flow;

[0006] A sewage treatment tank, wherein active materials and emergent plants are arranged in the sewage treatment tank, and the sewage treatment tank comprises a first treatment tank, a second treatment tank and a third treatment tank;

[0007] A water pipe system, which realizes the internal communication of the domestic sewage purification device;

[0008] The domestic sewage purification device includes two operating modes:

[0009] In the first mode, the first, second and third treatment tanks are connected in series to purify sewage;

[0010] In the second mode, the first, second and third treatment tanks are connected in parallel to purify sewage.

[0011] As a preferred technical solution, a water inlet and a water outlet are provided at both ends of the sewage treatment pool, and the sewage enters the sewage treatment pool at the bottom of the sewage treatment pool through the water inlet from the water conduit system.

[0012] As a preferred technical solution, the active materials in the first treatment tank are gravel and ceramsite.

[0013] As a preferred technical solution, the active materials in the second treatment tank are gravel, zeolite, medical stone, and reed activated carbon.

[0014] As a preferred technical solution, the active material in the third treatment tank is a modified mineral composite filler.

[0015] As a preferred technical solution, the water conduit system includes a plurality of gate valves, and the gate valves are used to realize the switching between the first mode and the second mode.

[0016] As a preferred technical solution, the emergent plant is super reed.

[0017] As a preferred technical solution, the processing scale of the domestic sewage purification device is ≤5t / d.

[0018] In summary, this application has the following technical effects:

[0019] The present application discloses an active material coupled with emergent plants to purify domestic sewage. The domestic sewage purifying device includes a regulating tank, a sewage treatment tank and a water pipe system. The regulating tank is used to regulate and balance the sewage flow; active materials and emergent plants are arranged in the sewage treatment tank, and the sewage treatment tank includes a first treatment tank, a second treatment tank and a third treatment tank; the water pipe system is used to achieve internal connectivity of the domestic sewage purifying device. Among them, the domestic sewage purifying device can achieve two operating modes through the water pipe system, namely, a first mode in which the first, second and third treatment tanks are arranged in series in sequence, and a second mode in which the first, second and third treatment tanks are arranged in parallel. The above-mentioned domestic sewage purifying device can not only achieve nitrogen and phosphorus removal to deeply purify sewage through active materials coupled with emergent plants, but also switch between two operating modes according to population size to meet different sewage treatment needs. In addition, the domestic sewage purifying device occupies a small area, has a simple structure, and has a low design cost, and has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram of a device for purifying domestic sewage in a first mode provided by some embodiments of the present invention, which is coupled with an emergent plant and has an active material;

[0022] Figure 2is a schematic diagram of a device for purifying domestic sewage by coupling an active material with an emergent plant in a second mode provided by some embodiments;

[0023] Figure 3 is a schematic diagram of a connection between a first treatment tank and a second treatment tank provided in some embodiments;

[0024] The meanings of the reference numerals are as follows:

[0025] 1-Regulating tank;

[0026] 21-first treatment tank, 22-second treatment tank, 23-third treatment tank;

[0027] 3-water pipe system, 31-water outlet pipe of regulating pool, 321-first branch pipe, 322-second branch pipe, 331-third branch pipe, 332-fourth branch pipe;

[0028] 4- Sewage source;

[0029] 5-nearby ditches;

[0030] 6- Gate valve. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. The present embodiment described herein is only for illustrative purposes and is not intended to limit the scope of protection of this application. Therefore, it should be understood that various modifications and changes can be made to this embodiment without departing from the scope of protection of this application.

[0032] In the description of this application, unless otherwise clearly specified and limited, the term "and / or" includes any and all combinations of one or more associated listed items. Unless otherwise specified or explained, the terms "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Further, in the description of the present application, it should be understood that the directional words described in the present embodiment are described at the angles shown in the accompanying drawings and should not be understood as limiting the present embodiment. It should also be understood that in the context, when it is mentioned that an element or feature is connected to another element (one or more), it can not only be directly connected to the other (one or more) elements, but also indirectly connected to the other (one or more) elements through an intermediate element.

[0034] Before introducing the technical solution of this application, it is necessary to explain the creation background of the invention of this application. This application aims to provide an active material coupled with emergent plants to purify domestic sewage, which is used for deep treatment and purification of rural decentralized domestic sewage.

[0035] For example embodiments of this application, please refer to Figures 1 to 3 , provides an active material coupled with emergent plants to purify domestic sewage, the device includes a regulating tank 1, a sewage treatment tank and a water pipe system 3, the regulating tank 1 is used to regulate and balance the sewage flow; the sewage treatment tank is arranged with active materials and emergent plants, and the sewage treatment tank includes a first treatment tank 21, a second treatment tank 22 and a third treatment tank 23; the water pipe system 3 is used to achieve the internal connection of the domestic sewage purification device. Among them, the domestic sewage purification device can realize two operation modes through the water pipe system 3, namely, a first mode in which the first, second and third treatment tanks 23 are arranged in series in sequence, and a second mode in which the first, second and third treatment tanks 23 are arranged in parallel.

[0036] Therefore, by adopting the above-mentioned domestic sewage purification device, domestic sewage flows into the regulating tank 1 from the outside, and the regulating tank 1 performs preliminary balancing treatment on the sewage in terms of water quality and water quantity. The sewage treated by the regulating tank 1 then flows into the sewage treatment tank through the water guide pipe, and the active materials in the multi-treatment tank are coupled with emergent plants to achieve nitrogen and phosphorus removal to deeply purify the sewage. At the same time, the device can switch between two operating modes according to the population size to meet different sewage treatment needs. In addition, the domestic sewage purification device occupies a small area, has a simple structure, and a low design cost, and has a good value for promotion and application.

[0037] In some embodiments, as a preferred technical solution, a water inlet and a water outlet are provided at both ends of the sewage treatment pool, and the sewage enters the sewage treatment pool at the bottom of the sewage treatment pool through the water inlet of the water conduit system 3. Specifically, the water inlet and the water outlet are respectively provided at both ends of each sewage treatment pool, and the sewage enters the sewage treatment pool at the bottom of the sewage treatment pool through the water conduit system 3 through the water inlet, so that the sewage entering each sewage treatment pool can fully contact the active materials at the bottom of each sewage treatment pool for adsorption and filtration, and perform microbial degradation, and then flow to the upper emergent plant area for further deep treatment.

[0038] As a preferred technical solution, the active materials in the first treatment tank 21 are gravel and ceramsite. Specifically, the ceramsite is made from sludge resource prepared from municipal sludge or river and lake bottom mud, which can realize the resource utilization of waste sludge. The sludge-based ceramsite can not only provide a proliferation site for microbial growth, but also provide nutrients for emergent plants, while adsorbing and filtering pollutants in sewage.

[0039] As a preferred technical solution, the active materials in the second treatment pool 22 are gravel, zeolite, medical stone, and reed bamboo activated carbon. Specifically, zeolite and medical stone have good denitrification effects, and reed bamboo biochar is prepared by high-temperature pyrolysis after super reed bamboo is harvested. Due to the developed microporous structure, huge specific surface area and rich surface functional groups of super reed bamboo, reed bamboo biochar can adsorb and remove various pollutants in sewage.

[0040] As a preferred technical solution, the active material in the third treatment tank 23 is a modified mineral composite filler. Specifically, the composite filler is made of modified minerals, loaded with rare earth elements by an in-situ growth method, has good phosphorus removal effect, high safety, and no adverse effects on human health and plant and animal growth.

[0041] As a preferred technical solution, please refer to Figure 3 The water conduit system 3 includes a plurality of gate valves 6, and the gate valves 6 are used to switch between the first mode and the second mode. For example, in some embodiments, see Figure 3 The water conduit at the water outlet of the first treatment tank 21 is a first two-way conduit, and the water conduit at the water inlet of the second treatment tank 22 is a second two-way conduit. The first two-way conduit includes a first branch pipe 321 and a second branch pipe 322, and the second two-way conduit includes a third branch pipe 331 and a fourth branch pipe 332. The first branch pipe 321 is connected to the third branch pipe 331, the second branch pipe 322 is connected to the nearby ditch, and the fourth branch pipe 332 is connected to the regulating tank outlet pipe 31. On this basis, the flow of each branch pipe is controlled by opening and closing the gate valve 6, thereby switching the arrangement relationship between the first treatment tank 21 and the second treatment tank 22. The structure of the water outlet of the second treatment tank 22 and the water inlet of the third treatment tank 23 is the same as the above arrangement. It will not be repeated here.

[0042] See also Figure 1 and Figure 2 The two operating modes of this domestic sewage purification device can be understood as follows:

[0043] The first mode: used in situations where the population is small and the amount of sewage is small, the first, second and third treatment tanks 23 are connected in series to purify sewage. Specifically, the sewage from the external sewage source 4 flows into the regulating tank 1 after removing some organic matter and suspended solids in the water body to adjust the water quality and water quantity balance, and then enters the first treatment tank 21 through the water inlet of the first treatment tank 21, and further undergoes ceramsite filtration and adsorption, microbial decomposition and emergent plant absorption in the first treatment tank 21, and the organic matter and suspended solids in the sewage are further reduced; thereafter, the sewage flows from the outlet of the first treatment tank 21 through the water pipe into the water inlet of the second treatment tank 22 to enter the second treatment tank 22, and is treated with zeolite, medical stone and reed bamboo in the second treatment tank 22. The total nitrogen, organic matter, total phosphorus and suspended solids in the sewage are further removed through the adsorption and filtration of biochar, microbial metabolism and emergent plant absorption. Afterwards, the sewage flows from the outlet of the second treatment tank 22 to the inlet of the third treatment tank 23 through the water guide pipe to enter the third treatment tank 23. In the third treatment tank 23, the sewage is subjected to the combined effects of composite mineral water purification materials for enhanced phosphorus removal, microbial metabolism and emergent plant absorption, and the nitrogen, phosphorus, organic matter and other pollutants in the sewage are further reduced. The treated sewage can meet the Class A standard and is finally discharged into the nearby ditch through the outlet of the third treatment tank 23.

[0044] The second mode: used in situations where the population is large and the amount of sewage is large, the first, second and third treatment tanks 23 are connected in parallel to purify the sewage. Specifically, the sewage from the external sewage source 4 flows into the regulating tank 1 after removing some organic matter and suspended matter in the water body to adjust the water quality and water quantity balance. Afterwards, the sewage enters the first treatment tank 21, the second treatment tank 22 and the third treatment tank 23 through the water inlet of the first, second and third treatment tanks 23 through the water pipe. In each sewage treatment tank, the sewage is adsorbed and filtered by active materials, decomposed by microbial metabolism and absorbed by emergent plants, and the concentration of organic matter, nitrogen, phosphorus and other pollutants in the sewage is reduced. The treated sewage is discharged into the nearby ditch through the water outlet of the first, second and third treatment tanks 23 through the water pipe.

[0045] As a preferred technical solution, the emergent plant is super reed. The root system of super reed is densely developed and can reach a depth of 3 to 5 meters. After planting, its developed root system will fill the entire sewage treatment pool, so that the filter material in the sewage treatment pool has good permeability, which can effectively prevent the sewage treatment pool from being blocked, realize the self-cleaning of the filler, and also increase the hydraulic load of the sewage treatment pool, and further provide oxygen for the microorganisms in the pool. In addition, super reed is a perennial plant, which can be planted once and harvested continuously for 15 to 20 years. After harvesting, super reed can produce hydrogen, natural gas, carbon monoxide, livestock reed biochar, etc., which has good ecological and environmental benefits.

[0046] It should be noted that the treatment scale of the domestic sewage purification device is ≤5t / d, and the system is suitable for the treatment of dispersed domestic sewage in rural areas or temporary domestic sewage treatment at construction sites.

[0047] In summary, compared with the prior art, this application has the following advantages:

[0048] (1) The operation mode of the domestic sewage purification device is adjustable. The three sewage treatment tanks can be operated in series or in parallel. It has strong resistance to hydraulic load shock and can adapt to seasonal changes in the rural population or changes in the population at different construction sites. When the population size is small, the first mode is adopted to further improve the sewage treatment effect. When the population size is large, the second mode is adopted, and the water volume treated per unit time can reach 3 times that of the first mode.

[0049] (2) The domestic sewage purification device has good denitrification and phosphorus removal effects. Nitrogen and phosphorus pollutants in sewage are removed through the combined effects of active material adsorption and filtration, super reed growth and absorption, and microbial degradation. Zeolite and medical stone fillers are designed for denitrification, and composite mineral fillers are designed for phosphorus removal. Therefore, its denitrification and phosphorus removal effects are further improved.

[0050] (3) The domestic sewage purification device has a simple structure and low construction cost. The operation mode can be adjusted by switching the gate valve. Daily maintenance only requires harvesting super reed once a year. The operation and maintenance are simple and have good promotion and application value.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An active material coupled with emergent plants to purify domestic sewage, It is characterized in that include: Regulating tanks, which are used to regulate and balance sewage flow; A sewage treatment tank, wherein active materials and emergent plants are arranged in the sewage treatment tank, and the sewage treatment tank comprises a first treatment tank, a second treatment tank and a third treatment tank; A water pipe system, which realizes the internal communication of the domestic sewage purification device; The domestic sewage purification device includes two operation modes: In the first mode, the first, second and third treatment tanks are connected in series to purify sewage; In the second mode, the first, second and third treatment tanks are connected in parallel to purify sewage.

2. The domestic sewage purification device according to claim 1, It is characterized in that The sewage treatment pool is provided with a water inlet and a water outlet at both ends, and the sewage enters the sewage treatment pool at the bottom of the sewage treatment pool through the water inlet from the water conduit system.

3. The domestic sewage purification device according to claim 1, It is characterized in that The active materials in the first treatment tank are gravel and ceramsite.

4. The domestic sewage purification device according to claim 1, It is characterized in that The active materials in the second treatment pool are gravel, zeolite, medical stone and reed activated carbon.

5. The domestic sewage purification device according to claim 1, It is characterized in that The active material in the third treatment tank is a modified mineral composite filler.

6. The domestic sewage purification device according to claim 1, It is characterized in that The water conduit system includes a plurality of gate valves, and the gate valves are used to realize the switching between the first mode and the second mode.

7. The domestic sewage purification device according to claim 1, It is characterized in that The emergent plant is super reed.

8. The domestic sewage purification device according to claim 1, It is characterized in that The domestic sewage purification device has a processing scale of ≤5t / d.

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