Novel integrated sewage treatment device

Abstract

The invention discloses a novel integrated sewage treatment device, and belongs to the field of sewage treatment, the novel integrated sewage treatment device comprises a shell, the interior of the shell is divided into a pre-reaction zone and a plurality of groups of comprehensive reaction zones; a stirrer is arranged in the pre-reaction area; a biological filler is arranged in each group of comprehensive reaction areas, and an aeration device is arranged in each group of comprehensive reaction areas; by highly integrating anaerobic, facultative, aerobic, solid-liquid separation and other functions in the same area, for example, all parts in a pre-reaction area and a comprehensive reaction area work cooperatively, the connection collaboration of functional areas is enhanced, and the occupied area and investment are reduced; during operation, parameters such as aeration, sludge backflow, sludge load and sludge age are flexibly regulated and controlled according to water quality, water quantity and working conditions, dominant microorganisms are cultured, efficiency and quality are improved, and the problem that a traditional process is insufficient in flexibility and adaptability is solved; the construction and operation cost is reduced due to the optimized layout, and the defects of dispersed functions, large occupied area, high investment, poor flexibility and the like of a traditional mode are effectively overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a novel integrated sewage treatment device. Background Art

[0002] In the field of sewage treatment, with the increasing requirements for environmental protection and the increasing shortage of water resources, higher requirements are placed on the efficiency, compactness and adaptability of sewage treatment technology. Traditional sewage treatment methods usually face the dilemma of decentralized functions. The various treatment links, such as anaerobic and aerobic functional areas, are independent of each other and require a large area for layout. This not only increases the cost of land resources, but also increases the investment scale of engineering construction. Moreover, the connection and collaborative work efficiency between different functional areas is low, resulting in the overall treatment process being not smooth enough, affecting the efficiency and quality of sewage treatment. In actual operation, when faced with different sewage quality, water volume and changes in treatment conditions, the flexibility of traditional processes is obviously insufficient, and it is difficult to quickly adjust process parameters and operation modes, and it is impossible to achieve the best treatment effect. Summary of the invention

[0003] The purpose of the present invention is to provide a new integrated sewage treatment device to solve the problems of traditional methods such as dispersed functions, large land area, high investment, poor coordination between functional areas, and insufficient flexibility in the face of changes in water quality and quantity conditions.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a novel integrated sewage treatment device, comprising a shell, the interior of which is divided into a pre-reaction zone and a plurality of groups of comprehensive reaction zones;

[0005] A stirrer is provided inside the pre-reaction zone;

[0006] Each group of the integrated reaction zones is provided with biological fillers, each group of the integrated reaction zones is provided with an aeration device, a decanter is provided at the end of each group of the integrated reaction zones, and a sludge return pump is provided at the bottom of the inner cavity side wall of the integrated reaction zones;

[0007] The dissolved oxygen content in the water in the comprehensive reaction zone is gradually increased by the aeration device;

[0008] When the dissolved oxygen content in the water of the comprehensive reaction zone is less than 0.2 mg / L, it is an anaerobic reaction; when the dissolved oxygen content in the water of the comprehensive reaction zone is between 0.2 and 0.5 mg / L, it is an anaerobic reaction; when the dissolved oxygen content in the water of the comprehensive reaction zone is greater than 2 mg / L, it is an aerobic reaction.

[0009] Furthermore, the inner cavity of the pre-reaction zone is provided with a partition, the front and rear sides and the right side of the partition are connected to the inner wall of the pre-reaction zone, and the left side of the partition forms a communication opening with the left side of the inner cavity of the pre-reaction zone.

[0010] Furthermore, four stirrers are arranged inside the pre-reaction zone, and the four stirrers are respectively installed at the front of the inner cavity of the pre-reaction zone, the front and rear sides of the partition, and the tail of the inner cavity of the pre-reaction zone.

[0011] Furthermore, the sludge return pump is arranged in the filler separation device.

[0012] Furthermore, a water distribution gate is provided between the pre-reaction zone and the four groups of comprehensive reaction zones.

[0013] Furthermore, the liquid decanted from the decanter is discharged from the water outlet.

[0014] Furthermore, the comprehensive reaction zones are provided with four groups, and the four groups of comprehensive reaction zones are operated alternately in four modes of water intake, aeration, sedimentation and drainage.

[0015] Furthermore, a mud discharge port is provided at the bottom of the comprehensive reaction zone.

[0016] Furthermore, the microorganisms carried by the biological filler include anaerobic ammonia-oxidizing microorganisms, facultative anaerobic microorganisms and aerobic microorganisms.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This new integrated sewage treatment device integrates anaerobic, facultative anerobic, aerobic, solid-liquid separation and other functions in the same area, such as the coordinated operation of various components in the pre-reaction area and the comprehensive reaction area, which enhances the coordination of functional areas and reduces land occupation and investment. During operation, it flexibly adjusts aeration, sludge return, sludge load, sludge age and other parameters according to water quality and quantity conditions to cultivate dominant microorganisms, improve efficiency and quality, and overcome the problem of insufficient flexibility and adaptability of traditional processes. It also reduces construction and operation costs due to optimized layout, effectively solving the disadvantages of traditional methods such as dispersed functions, large land occupation, high investment and poor flexibility.

[0019] This new integrated sewage treatment device is easy to inspect and maintain. The equipment in the pre-reaction area can be lifted out of the water for inspection without cleaning the pool. When one of the comprehensive reaction areas needs to be inspected, the normal operation of other comprehensive reaction areas can be maintained by isolating the water distribution gate. At the same time, one pre-reaction area is equipped with four comprehensive reaction areas. In the same time period, the four comprehensive reaction areas operate alternately in four modes of water intake, aeration, sedimentation, and drainage, and the corresponding pre-reaction area continuously takes in water to improve the sewage treatment efficiency.

[0020] This new integrated sewage treatment device, by setting microbial carrier fillers in the biochemical reaction tank, cultivates and expands the anaerobic ammonia oxidizing microbial population, improves the denitrification effect of the sewage treatment system and has a certain phosphorus removal effect. By cultivating anaerobic ammonia oxidizing bacteria and adjusting the anaerobic, anoxic and aerobic reaction time of the sewage treatment system, anaerobic ammonia oxidation is achieved on the basis of traditional denitrification denitrification, thereby improving the denitrification effect under the condition of insufficient carbon source in traditional biochemical processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a top view of a new integrated sewage treatment device (with the shell top plate removed).

[0022] In the figure: 1, water inlet; 2, mixer; 3, pre-reaction zone; 3A, partition; 3B, connecting port; 4, integrated reaction zone; 5, aeration device; 6, sludge return pump; 7, decanter; 8, water outlet; 9, sludge discharge port; 10, filler separation device; 11, water distribution gate. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the embodiments.

[0024] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0025] See also Figure 1 The present invention provides a novel integrated sewage treatment device, including a shell, the interior of which is divided into a pre-reaction zone 3 and a plurality of comprehensive reaction zones 4.

[0026] A water inlet 1 is arranged on the right side of the front part of the shell.

[0027] A partition 3A is provided in the inner cavity of the pre-reaction zone 3, the front and rear sides and the right side of the partition are connected to the inner wall of the pre-reaction zone 3, and the left side of the partition forms a connecting port 3B with the left side of the inner cavity of the pre-reaction zone 3.

[0028] Four stirrers 2 are arranged inside the pre-reaction zone 3, and the four stirrers 2 are installed in sequence from front to back at the front of the inner cavity of the pre-reaction zone 3, the front of the partition 3A, the rear of the partition 3A and the rear of the inner cavity of the pre-reaction zone 3.

[0029] The integrated reaction zone 4 is provided with four groups, and biological fillers are arranged inside the four groups of integrated reaction zones 4, and the biological fillers are evenly dispersed in the entire integrated reaction zone 4; the biological fillers are evenly dispersed inside the integrated reaction zone 4, and the biological fillers are carriers of microorganisms, including anaerobic ammonia oxidizing microorganisms, facultative anaerobic microorganisms, and aerobic microorganisms; under anaerobic conditions, ammonia is used as an electron donor, and nitrate or nitrite is used as an electron acceptor to oxidize ammonia into nitrogen gas, which saves more than 60% of the oxygen supply compared with the whole nitrification (ammonia oxidation into nitrate). Using ammonia as an electron donor can also save the carbon source required in the traditional biological denitrification process. At the same time, since the cell yield of anaerobic ammonia oxidizing bacteria is much lower than that of denitrifying bacteria, the sludge output of the anaerobic ammonia oxidation process is also much lower than the sludge output of the traditional biological denitrification process; on the one hand, the amount of microorganisms per unit volume of the reaction pool is increased, and on the other hand, through the barrier effect of the biological filler, the internal part can still maintain a specific anaerobic environment when the external environment changes, which is conducive to the diversification of the microbial population and the progress of the reaction, and improves the overall treatment effect.

[0030] An aeration device 5 is provided inside each group of comprehensive reaction zones 4. A decanter 7 is provided at the end of the inner cavity of each group of comprehensive reaction zones 4. The decanter is a device used in the SBR process to regularly remove clarified water. It has the function of decanting clarified water from the static pool surface without stirring the sediment, thereby ensuring the water quality of the effluent. The decanter 7 is connected to the water outlet 8.

[0031] The sewage entering the integrated reaction zone 4 has a dissolved oxygen content of <0.2 mg / L due to the biochemical respiration of aerobic microorganisms. At this time, the integrated reaction zone 4 also serves as a secondary anaerobic reaction zone. At the same time, due to the barrier of the biological filler, the anaerobic environment is still maintained inside the biological filler, which is conducive to the growth of anaerobic microorganisms and the progress of anaerobic reactions.

[0032] As aeration proceeds, the dissolved oxygen concentration in the water gradually increases to 0.2-0.5 mg / L, and the anaerobic environment is maintained for a certain period of time, which is conducive to the growth of anaerobic microorganisms and anaerobic reactions. As the aeration time increases, the dissolved oxygen content in the integrated reaction zone 4 will reach a level greater than 2 mg / L, and the reaction zone at this time is dominated by aerobic reactions.

[0033] During the operation of the system, the aeration intensity, aeration time, sludge return flow, sludge load and sludge age are adjusted in combination with the incoming water quality, treated water volume and system load to control the anaerobic, facultative anaerobic and aerobic reaction times, optimize the operation of the sewage treatment system, cultivate the dominant microorganisms required for the operation, including anaerobic ammonia-oxidizing bacteria, and achieve the sewage treatment goals.

[0034] A sludge discharge port 9 is provided at the bottom of the four groups of comprehensive reaction zones 4, and a sludge return pump 6 is provided at the bottom of the inner cavity side wall of the four groups of comprehensive reaction zones 4. The sludge return pump 6 is arranged in a filler separation device 10. The filler separation device 10 can prevent the biological filler from clogging the sludge return pump 6, realize the separation of the biological filler from the biological sludge and sewage, and ensure that the sludge return pump 6 can operate stably for a long time.

[0035] A water distribution gate 11 is provided between the pre-reaction zone 3 and the four groups of comprehensive reaction zones 4 .

[0036] The working principle of the present invention is as follows: first, sewage enters the pre-reaction zone 3 through the water inlet 1, and anaerobic reaction is achieved in the pre-reaction zone 3 by controlling the dissolved oxygen content of the mixed liquid to be less than 0.2 mg / L. This is the primary anaerobic reaction zone of the sewage treatment device, which realizes the mixed reaction of sewage and return sludge and pre-denitrification; the submersible mixer 2 can prevent sludge precipitation and realize the full mixing reaction of mud and water, and then the sewage enters different comprehensive reaction zones 4 respectively through the water distribution gate 11.

[0037] The sewage entering the integrated reaction zone 4 has a dissolved oxygen content of <0.2 mg / L due to the biochemical respiration of aerobic microorganisms. At this time, the integrated reaction zone 4 also serves as a secondary anaerobic reaction zone. At the same time, due to the barrier of the biological filler, the anaerobic environment is still maintained inside the biological filler, which is conducive to the growth of anaerobic microorganisms and the progress of anaerobic reactions.

[0038] As aeration proceeds, the dissolved oxygen concentration in the water gradually increases to 0.2-0.5 mg / L, and the anaerobic environment is maintained for a certain period of time, which is conducive to the growth of anaerobic microorganisms and anaerobic reactions. As the aeration time increases, the dissolved oxygen content in the integrated reaction zone 4 will reach a level greater than 2 mg / L, and the reaction zone at this time is dominated by aerobic reactions.

[0039] After the sewage treated in the comprehensive reaction zone 4 is aerated and settled to achieve mud-water separation, the supernatant is discharged through the decanter 7 and the water outlet 8 or enters the subsequent treatment unit for further treatment, and the remaining sludge is discharged from the device through the mud outlet 9.

[0040] One set of pre-reaction zones 3 is followed by four sets of integrated reaction zones 4. In the same time period, the four sets of integrated reaction zones 4 are respectively operated in four modes of water intake, aeration, sedimentation and drainage, and the corresponding pre-reaction zones 3 are continuously fed with water.

[0041] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description, and these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A new integrated sewage treatment device, characterized in that: It comprises a shell, the interior of which is divided into a pre-reaction zone (3) and a plurality of comprehensive reaction zones (4); A stirrer (2) is provided inside the pre-reaction zone (3); Each group of the integrated reaction zones (4) is provided with biological fillers, each group of the integrated reaction zones (4) is provided with an aeration device (5), each group of the integrated reaction zones (4) is provided with a decanter (7), and a sludge return pump (6) is provided at the bottom of the inner cavity side wall of the integrated reaction zones (4); The dissolved oxygen content in the water in the integrated reaction zone (4) is gradually increased through the aeration device (5).

2. A novel integrated sewage treatment device according to claim 1, characterized in that: The inner cavity of the pre-reaction zone (3) is provided with a partition (3A), the front and rear sides and the right side of the partition are connected to the inner wall of the pre-reaction zone (3), and the left side of the partition forms a connecting opening (3B) with the left side of the inner cavity of the pre-reaction zone (3).

3. A novel integrated sewage treatment device according to claim 2, characterized in that: Four stirrers (2) are arranged inside the pre-reaction zone (3), and the four stirrers (2) are respectively installed at the front of the inner cavity of the pre-reaction zone (3), the upper and lower sides of the partition (3A), and the rear of the pre-reaction zone (3).

4. A novel integrated sewage treatment device according to claim 1, characterized in that: The sludge return pump (6) is arranged in the filler separation device (10).

5. The novel integrated sewage treatment device according to claim 1 is characterized in that: A water distribution gate (11) is provided between the pre-reaction zone (3) and the four groups of comprehensive reaction zones (4).

6. A novel integrated sewage treatment device according to claim 1, characterized in that: The liquid decanted from the decanter (7) is discharged from the water outlet (8).

7. A novel integrated sewage treatment device according to claim 1, characterized in that: The comprehensive reaction zones (4) are provided with four groups, and the four groups of comprehensive reaction zones (4) are operated alternately in four modes: water intake, aeration, sedimentation, and drainage.

8. The novel integrated sewage treatment device according to claim 1 is characterized in that: A mud discharge port (9) is provided at the bottom of the comprehensive reaction zone (4).

9. A novel integrated sewage treatment device according to any one of claims 1 to 8, characterized in that: The biological filler serves as a carrier for anaerobic ammonium oxidizing microorganisms, facultative anaerobic microorganisms and aerobic microorganisms.

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