Micro-polluted river and lake water treatment reactor with landscape and economic effects

Abstract

The invention relates to the technical field of water pollution, in particular to a micro-polluted river and lake water treatment reactor with both landscape and economic effects. The micro-polluted river and lake water treatment reactor is prepared on the basis of combination of an ecological method and a biological membrane method, the micro-polluted river and lake water is introduced into the micro-polluted river and lake water treatment reactor prepared on the basis of the ecological biological membrane method, and the technical problem that landscape and economic effects cannot be achieved at the same time in the prior art can be solved; the system has great advantages in the aspects of reducing construction and operation cost, reducing land area, improving treatment efficiency and the like, has landscape and economic effects on the premise of meeting the water treatment effect, and can also be applied to different water treatment scenes, such as landscape water body treatment, aquaculture tail water treatment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution, and more specifically, to a reactor for treating slightly polluted river and lake water with both landscape and economic effects. Background Art

[0002] Slightly polluted rivers and lakes refer to rivers and lakes that are slightly polluted and some indicators fail to meet the implementation standard level in the Surface Water Environmental Quality Standard (GB3828-2002). The degree of pollution of organic matter, ammonia nitrogen, phosphorus, etc. in their water is relatively low, but the types of pollutants are numerous and the quality is complex, which affects the further use of water and cannot meet functions such as landscape, irrigation, aquaculture, contact or water source.

[0003] At present, the main treatment technologies for slightly polluted rivers and lakes in China are physical treatment, chemical treatment, physical and chemical treatment, biological-ecological treatment, ecological restoration technology, etc. They each have their own advantages and disadvantages, but none of them can meet the requirements of water treatment effect while achieving both landscape and economic effects. Especially when the treatment object is slightly polluted water, the improvement is marginal, the absolute value of water quality improvement is small, but the investment cost and energy consumption are high, and the economic efficiency is poor.

[0004] The ecological method mainly reduces pollutants in the water by restoring the water ecology and utilizing the synergistic effects of microorganisms, plants and aquatic animals. It has low energy consumption and good landscape effects, but it is less efficient and requires a larger area to improve processing capacity. In addition, since the ecosystem is small, it is prone to imbalance and requires more human intervention to maintain the ecosystem.

[0005] The biofilm method uses natural materials (such as volcanic rocks) and synthetic materials (such as fibers) to provide carriers for the attachment of microorganisms, allowing microorganisms to grow on their surfaces and gradually forming a special biofilm. The difference in the surface and inner environments of the biofilm makes the microorganisms diverse. The combined action of aerobic, anaerobic and facultative microorganisms is conducive to enhancing the degradation of organic matter, nitrogen, phosphorus and other pollutants. The biofilm method has a high treatment efficiency, but the landscape effect is poor. In addition, the biofilm method has different advantages and disadvantages due to different filler materials and reactor structures, which are specifically reflected in the biofilm situation, treatment efficiency, reactor flexibility, and application area.

[0006] Therefore, the combination of ecological method and biofilm method has great advantages in reducing construction and operation costs, reducing land area, and improving treatment efficiency. It has both landscape and economic effects while meeting the water treatment effect. At the same time, it can also be applied to different water treatment scenarios, such as micro-polluted river and lake management, landscape water body management, aquaculture tailwater treatment, etc. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a reactor for treating slightly polluted river and lake water, which is used to solve the technical problem that the prior art cannot achieve both landscape and economic effects at the same time.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: A reactor for treating slightly polluted river and lake water with both landscape and economic effects, comprising a shell, a top cover and fillers; a plurality of lower guide plates are arranged inside the shell, a plurality of upper guide plates are arranged below the top cover, at least part of the lower guide plates and at least part of the upper guide plates are alternately arranged to form a waterway for reciprocating flow of sewage, and the fillers are filled in the waterway; a mud collecting hopper is formed at the bottom of the shell, and a mud discharge inspection valve is arranged at the bottom of the mud collecting hopper.

[0009] Optionally, a water inlet and a water outlet are formed between the shell and the top cover, the water inlet is located on one side of the reactor, and the water outlet is located on the other side of the reactor.

[0010] Optionally, the water inlet is located above the water outlet, and the height difference between the water inlet and the water outlet is used as water flow power.

[0011] Optionally, the mud discharge end of the mud discharge inspection valve is provided with a mud discharge pump for discharging the sludge deposited at the bottom or the detached biofilm.

[0012] Optionally, the shell is made of at least one of steel, concrete, PE, and foam ceramic.

[0013] Optionally, the material of the top cover is consistent with that of the shell, and a cultivation hole for planting aquatic plants is opened on the top to improve the nitrogen and phosphorus removal effect.

[0014] Optionally, the filler is selected from any one of sponge, PE, and foam ceramic.

[0015] Another object of the present invention is to provide a method for treating slightly polluted river and lake water with both landscape and economic effects, by passing slightly polluted river and lake water into the aforementioned reactor for treating slightly polluted river and lake water.

[0016] Optionally, the micro-polluted river and lake water treatment reactor is installed in any of the above-ground, buried, submerged or dam-type forms.

[0017] In summary, the present invention has the following beneficial effects: by passing slightly polluted river and lake water into a slightly polluted river and lake water treatment reactor prepared based on the ecological biofilm method, the technical problem that the existing technology cannot have both landscape and economic effects can be solved. The method provided by the present invention is based on the combination of ecological method and biofilm method, and has great advantages in reducing construction and operation costs, reducing land area, and improving treatment efficiency. In addition to having both landscape and economic effects, it can also be applied to different water treatment scenarios, such as landscape water treatment, aquaculture tailwater treatment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the reactor for treating slightly polluted river and lake water in the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] A reactor for treating slightly polluted river and lake water with both landscape and economic effects, comprising a shell 1, a top cover 2 and a filler 8; a plurality of lower guide plates 11 are arranged inside the shell 1, a plurality of upper guide plates 21 are arranged below the top cover 2, at least part of the lower guide plates 11 and at least part of the upper guide plates 21 are alternately arranged to form a waterway for reciprocating flow of sewage, and the filler 8 is filled in the waterway; a mud collecting bucket 12 is formed at the bottom of the shell 1, and a mud discharge inspection valve 5 is arranged at the bottom of the mud collecting bucket 12.

[0023] Furthermore, a water inlet 3 and a water outlet 4 are formed between the shell 1 and the top cover 2. The water inlet 3 is located on one side of the reactor, and the water outlet 4 is located on the other side of the reactor.

[0024] Furthermore, the water inlet 3 is located above the water outlet 4, and the height difference between the water inlet 3 and the water outlet 4 is used as water flow power.

[0025] Furthermore, a mud discharge pump 6 is provided at the mud discharge end of the mud discharge inspection valve 5 for discharging the mud deposited at the bottom or the detached biofilm.

[0026] Furthermore, the shell 1 is made of at least one material selected from the group consisting of steel, concrete, PE, and foam ceramics.

[0027] Furthermore, the material of the top cover 2 is consistent with that of the shell 1, and a cultivation hole 22 for planting aquatic plants 7 is opened on the top to improve the nitrogen and phosphorus removal effect.

[0028] Furthermore, the filler 8 is selected from any one of sponge, PE, and foam ceramic.

[0029] like Figure 1 As shown, the shell 1 of the micro-polluted river and lake water treatment reactor can be made of steel structure, concrete structure, PE, foam ceramic and other materials, and can be selected according to the investment situation and environmental conditions such as on-site geology and hydrology; the lower guide plate 11 and the inner wall in the micro-polluted river and lake water treatment reactor can be made of foam ceramic or volcanic stone and other materials. The above materials have evenly distributed micropores or holes, high porosity, high specific surface area, and selective permeability to liquid and gaseous media. They are also resistant to high temperature, corrosion, chemical stability and dimensional stability. They can form a rich variety of microbial flora on the surface, and have good adsorption and degradation effects on various pollutants. The shell 1 and the lower guide plate 11 are fixed with high-strength corrosion-resistant screws or inlay structures, or are formed by the same material through an integrated molding process.

[0030] The top cover 2 can be made of steel structure, concrete structure, PE, foam ceramic and other materials, and fixed to the top of the shell 1 by high-strength corrosion-resistant screws or inlay structures. The upper guide plate 21 and the inner wall can be made of foam ceramic or volcanic stone and other materials. The above materials have uniformly distributed micropores or holes, high porosity, high specific surface area, selective permeability to liquid and gaseous media, and are resistant to high temperature, corrosion, chemical stability and dimensional stability. A rich variety of microbial flora can be formed on the surface, which has good adsorption and degradation effects on various pollutants. The top cover 2 and the upper guide plate 21 are fixed with high-strength corrosion-resistant screws or inlay structures, or are formed by the same material through an integrated molding process.

[0031] The shell 1 and the top cover 2 form a reciprocating curved waterway under the action of the upper guide plate 21 and the lower guide plate 11, and the upper half of the waterway is fixedly filled with a filler 8 through an inlaid structure. The filler 8 filters the sewage and adsorbs and degrades the pollutants. This method can effectively avoid clogging of the filler 8, because the sludge or biofilm accumulated in the filler 8 will partially fall off, and the fallen sludge or biofilm will be deposited at the bottom of the micro-polluted river and lake water treatment reactor, so that the sludge or biofilm in the pores of the filler will not accumulate and cause clogging.

[0032] The aquatic plants 7 are planted in the planting holes 22 on the top of the top cover 2, and can also be planted in flower pots. The specific varieties can be selected according to the installation method or the landscape / water quality treatment requirements. The aquatic plants 7 have developed root systems, which can absorb nutrients such as nitrogen and phosphorus. The roots will enter the gaps in the filler as they grow, and can also provide an attachment and growth environment for microorganisms, further improving the adsorption and degradation of pollutants, and can provide excellent landscape effects.

[0033] The lower guide plates 11 and the upper guide plates 21 are alternately arranged in sequence to form a waterway for changing the flow direction of the water body. Figure 1 The micro-polluted river and lake water treatment reactor shown in the figure is provided with four upper guide plates 21 and three lower guide plates 11, and the upper guide plates 21 and the lower guide plates 11 are made of the same filler. The lower guide plate 11 located in the middle is in a herringbone shape, and forms two small mud collecting buckets 12 with the lower guide plates 11 adjacent to the left and right sides respectively. A large mud collecting bucket 12 is formed at the bottom of the overall shell 1.

[0034] The inlet end of the mud pump inspection valve 5 is connected to the inside of the mud collecting bucket 12, and its main function is to prevent sludge from being discharged when the mud pump 6 is replaced or inspected.

[0035] The sludge pump 6 is connected to the outlet end of the sludge pump inspection valve 5, and its main function is to discharge the sludge or biofilm deposited at the bottom of the sludge collecting bucket 12. The sludge can be used as greening soil after dehydration, and the biofilm can be put into the water body to improve the water quality.

[0036] The present application mainly realizes the treatment of micro-polluted river and lake water by a micro-polluted river and lake water treatment reactor made according to the vertical flow ecological biofilm process. The micro-polluted river and lake water treatment reactor can be constructed and installed in the form of above-ground type, buried type, placed in water or made into a dam. After the micro-polluted water enters the micro-polluted river and lake water treatment reactor, due to the height difference between the water inlet 3 and the water outlet 4, it can flow through the internal filler and plant root system of the micro-polluted river and lake water treatment reactor under the joint action of gravity, the lower guide plate 11 and the upper guide plate 21, so that the water quality is purified and discharged, and a mud collecting bucket 12 is set at the bottom of the micro-polluted river and lake water treatment reactor to collect the detached sludge and biofilm, and discharge it with a mud pump 6. If the installation position of the micro-polluted river and lake water treatment reactor is higher than the water intake point, a water pump is required to lift the raw water to the micro-polluted river and lake water treatment reactor for treatment, otherwise it is not needed.

[0037] The micro-polluted river and lake water treatment reactor of the present application is installed in any form of above-ground, buried, placed in water or dam type.

[0038] In this embodiment, the shell 1, the top cover 2, the lower guide plate 11 and the upper guide plate 21 are all made of high carbon steel, with an overall size of 2300mm*6000mm*2300mm and an effective volume of 27.6m 3The filler 8 is made of sponge, and the top cover 2 is located on the upper part of the shell 1 to biodegrade the sewage.

[0039] The reactor was operated in a continuous flow mode. The raw water was the tail water from the ecological restoration of the front pond of Xiaonan Village, Lishui Town, Nanhai District, Foshan City, Guangdong Province. The reactor had a stable removal effect on ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, total nitrogen and total phosphorus. Among them, the removal effect on ammonia nitrogen was the most obvious. The ammonia nitrogen concentration of the reactor effluent was always significantly lower than the ammonia nitrogen concentration of the reactor inlet. The ammonia nitrogen and total phosphorus concentrations of the raw water belonged to Class IV water in the "Surface Water Environmental Quality Standards". The ammonia nitrogen and total phosphorus concentrations of the reactor effluent basically met the Class III water standards stipulated in the "Surface Water Environmental Quality Standards". The removal rates of ammonia nitrogen and total phosphorus in the reactor were as low as 30.8% and 31.2% respectively. When the hydraulic retention time (HRT) was 17h, the removal rates of ammonia nitrogen and total phosphorus were the highest, reaching 43.0% and 46%.

[0040] It can be seen that the present invention can solve the technical problem that the existing technology cannot have both landscape and economic effects by passing the micro-polluted river and lake water into the micro-polluted river and lake water treatment reactor prepared based on the ecological biofilm method. The treatment method provided by the present invention is based on the combination of ecological method and biofilm method, and has great advantages in reducing construction and operation costs, reducing land area, and improving treatment efficiency. In addition to having both landscape and economic effects, it can also be applied to different water treatment scenarios, such as landscape water treatment, aquaculture tail water treatment, etc.

[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A reactor for treating slightly polluted rivers and lakes with both landscape and economic effects, characterized in that: It includes a shell, a top cover and fillers; a plurality of lower guide plates are arranged inside the shell, a plurality of upper guide plates are arranged below the top cover, at least part of the lower guide plates and at least part of the upper guide plates are alternately arranged to form a waterway for sewage to flow back and forth, and the fillers are filled in the waterway; a mud collecting bucket is formed at the bottom of the shell, and a mud discharge inspection valve is arranged at the bottom of the mud collecting bucket.

2. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 1 is characterized in that: A water inlet and a water outlet are formed between the shell and the top cover. The water inlet is located on one side of the reactor, and the water outlet is located on the other side of the reactor.

3. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 2 is characterized in that: The water inlet is located above the water outlet, and the height difference between the water inlet and the water outlet is used as the water flow power.

4. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 1 is characterized in that: The mud discharge end of the mud discharge inspection valve is provided with a mud discharge pump for discharging the sludge deposited at the bottom or the detached biofilm.

5. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 1 is characterized in that: The shell is made of at least one material selected from the group consisting of steel, concrete, PE and foam ceramics.

6. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 5 is characterized in that: The material of the top cover is consistent with that of the shell, and a cultivation hole for planting aquatic plants is opened on the top to improve the nitrogen and phosphorus removal effect.

7. The micro-polluted river and lake water treatment reactor with both landscape and economic effects according to claim 1 is characterized in that: The filler is selected from any one of sponge, PE and foam ceramic.

8. A method for treating slightly polluted rivers and lakes with both landscape and economic effects, characterized in that: The slightly polluted river and lake water is passed into the slightly polluted river and lake water treatment reactor described in any one of claims 1-7.

9. The method for treating slightly polluted rivers and lakes with both landscape and economic effects according to claim 8, characterized in that: The micro-polluted river and lake water treatment reactor is installed in any of the above-ground, buried, submerged or dam-type forms.

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