Anaerobic sewage treatment system

Abstract

The utility model relates to an anaerobic sewage treatment system which comprises a sewage treatment tank, the sewage treatment tank is communicated with a liquid treater through a pipeline, the sewage treatment tank is communicated with a sludge treatment assembly through a pipeline, an anaerobic reactor is communicated with a first-stage O tank through a pump and a pipeline, and the first-stage O tank is communicated with the sludge treatment assembly through a pump and a pipeline. Valves are mounted on pipelines for connecting the sewage treatment tank with the liquid treater and the sludge treatment assembly; according to the treatment system, the sludge is directly conveyed into the first-stage A tank and the second-stage O tank, nitration reaction and denitrification reaction of the first-stage A tank and the second-stage O tank are promoted, organic matters in the sludge are treated, and the amount of organic wastewater entering the anaerobic reactor is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an anaerobic sewage treatment system. Background Technique

[0002] The wastewater generated in the yeast production process belongs to high-concentration organic wastewater, which has a high COD concentration and contains rich inorganic trace elements such as nitrogen, phosphorus, potassium, calcium, and iron. Its biodegradability is poor. If these wastewaters are directly discharged, they will cause great pollution to the receiving water body. Therefore, the wastewater must be treated to meet the standards before it can be directly discharged.

[0003] At present, for the sewage after chemical precipitation, usually the sludge at the bottom of the sedimentation tank is transported to the sludge thickening tank, and part of the upper-layer sewage is transported to the anaerobic reactor for treatment, and part is transported to the first-class A tank and the second-class O tank to carry out nitrification reaction and denitrification reaction using the COD in the sewage. This method will reduce the amount of upper-layer organic wastewater entering the anaerobic reactor and cause waste of organic matter in the sludge. Therefore, how to overcome the above existing technical problems and defects has become the key problem to be solved. Summary of the Invention

[0004] The utility model purpose of the present utility model is to overcome the defects described in the background technique, so as to realize an anaerobic sewage treatment system. This treatment system directly transports the sludge to the first-class A tank and the second-class O tank, promotes the nitrification reaction and denitrification reaction in the first-class A tank and the second-class O tank, not only treats the organic matter in the sludge, but also increases the amount of organic wastewater entering the anaerobic reactor.

[0005] To achieve the above utility model purpose, the technical solution of the present utility model is: an anaerobic sewage treatment system, including a sewage treatment tank. The sewage treatment tank is communicated with a liquid processor through a pipeline, the sewage treatment tank is communicated with a sludge treatment component through a pipeline, the anaerobic reactor is communicated with the first-class O tank through a pump and a pipeline, the first-class O tank is communicated with the sludge treatment component through a pump and a pipeline, and valves are installed on the pipelines connecting the sewage treatment tank with the liquid processor and the sludge treatment component.

[0006] Further, the sewage treatment tank includes a reaction tank, a sedimentation tank, and a water distribution tank.

[0007] Further, the liquid processor is an anaerobic reactor, a water pump is arranged above the sedimentation tank, and the water pump is communicated with the water inlet of the anaerobic reactor through a pipeline.

[0008] Further, the sludge treatment component includes a first-class A tank and a second-class O tank, a sludge pump is arranged at the bottom of the sedimentation tank, and the sludge pump is communicated with the feed inlets of the first-class A tank and the second-class O tank through pipelines respectively.

[0009] Beneficial effects of the anaerobic sewage treatment system of the present utility model:

[0010] 1. For the anaerobic sewage treatment system of the present utility model, the sludge at the bottom of the sedimentation tank is directly transported to the first-stage A tank and the second-stage O tank, eliminating the steps of sludge entering the thickening tank for thickening and subsequent treatment, greatly simplifying the sewage treatment process, saving the cost of the sludge thickening and subsequent treatment line, and at the same time utilizing the organic matter in the sludge and enhancing the utilization value of the sludge.

[0011] 2. For the anaerobic sewage treatment system of the present utility model, since the COD required for the nitrification reaction and denitrification reaction in the first-stage A tank and the second-stage O tank is directly provided by the sludge, the water in the upper part of the sedimentation tank can all enter the anaerobic reactor, increasing the amount of water entering the anaerobic reactor, and the reaction output in the anaerobic reactor also increases accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the anaerobic sewage treatment system of the present utility model;

[0013] Figure 2 is a schematic diagram of the prior art;

[0014] In the figure: 1 - sewage treatment tank, 2 - anaerobic reactor, 3 - sludge thickening tank, 4 - first-stage A tank, 5 - second-stage O tank, 6 - first-stage O tank, 7 - first-stage O tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The anaerobic sewage treatment system of the present utility model will be described in more detail below with reference to the drawings and through specific embodiments.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0017] See Figure 1 , an anaerobic sewage treatment system of this embodiment, which directly transports the sludge to the first-stage A tank and the second-stage O tank, promoting the nitrification reaction and denitrification reaction in the first-stage A tank and the second-stage O tank, not only treating the organic matter in the sludge, but also increasing the amount of organic wastewater entering the anaerobic reactor. It mainly includes a sewage treatment tank 1, and the sewage treatment tank 1 includes a reaction tank, a sedimentation tank, and a water distribution tank.

[0018] See in detail Figure 1, a water pump is provided at the upper part of the sedimentation tank of the sewage treatment tank 1. The water pump is connected to the water inlet of the anaerobic reactor 2 through a pipeline. A sludge pump is provided at the bottom of the sedimentation tank. The sludge pump is connected to the feeding ports of the first-level A tank 4 and the second-level O tank 5 through pipelines respectively. The anaerobic reactor 2 is connected to the first-level O tank 6 through a pump and a pipeline. The first-level O tank 6 is connected to the feeding ports of the first-level O tank 7, the first-level A tank 4 and the second-level O tank 5 through pumps and pipelines respectively. Two-way control valves are installed on the pipelines connecting the sewage treatment tank 1 with the anaerobic reactor 2, the first-level A tank 4 and the second-level O tank 5, between the anaerobic reactor 2 and the first-level O tank 6, and between the first-level O tank 6 and the first-level O tank 7, the first-level A tank 4 and the second-level O tank 5.

[0019] Figure 2 It is a schematic diagram of the prior art. The sludge at the bottom of the sedimentation tank of the sewage treatment tank 1 enters the thickening tank 3 for separate further treatment. Most of the high-COD water at the upper part of the sedimentation tank enters the anaerobic reactor 2, and part enters the first-level A tank 4 and the second-level O tank 5 for nitrification reaction and denitrification reaction.

[0020] In the improved system, not only the organic matter in the sludge can be utilized and consumed, without the need for separate treatment, saving the sludge treatment cost, but also all the high-COD water at the upper part of the sedimentation tank can enter the anaerobic reactor. The first-level A tank and the second-level O tank do not need to consume the high-COD water entering the anaerobic reactor, improving the economic efficiency of sewage treatment.

[0021] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning understood by those of ordinary skill in the field to which the present utility model belongs. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, whether direct or indirect.

[0022] In the above text, the exemplary embodiments of the present utility model are described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and changes can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present utility model can be made, without exceeding the protection scope of the present utility model.

Claims

1. An anaerobic sewage treatment system, comprising a sewage treatment tank, characterized in that: The sewage treatment pool is connected to the liquid processor through a pipeline, the sewage treatment pool is connected to the sludge treatment component through a pipeline, the anaerobic reactor is connected to the primary O tank through a pump and a pipeline, the primary O tank is connected to the primary O tank and the sludge treatment component through a pump and a pipeline, and valves are installed on the pipelines connecting the sewage treatment pool and the liquid processor and the sludge treatment component.

2. The anaerobic wastewater treatment system according to claim 1, characterized in that: The sewage treatment tank comprises a reaction tank, a sedimentation tank and a water distribution tank.

3. The anaerobic wastewater treatment system according to claim 1 or 2, characterized in that: The liquid treatment device is an anaerobic reactor. A water pump is arranged on the upper part of the sedimentation tank. The water pump is connected with the water inlet of the anaerobic reactor through a pipeline.

4. The anaerobic wastewater treatment system according to claim 1 or 2, characterized in that: The sludge treatment component comprises a primary A tank and a secondary O tank. A sludge pump is arranged at the bottom of the sedimentation tank. The sludge pump is connected to the feed inlets of the primary A tank and the secondary O tank respectively through pipelines.

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