Novel sulfur autotrophic denitrification nitrogen removal reactor

Abstract

The utility model provides a novel sulfur autotrophic denitrification nitrogen removal reactor, which comprises a clear water zone, a mud-water separation zone, a buffer zone, a reaction zone, a water distribution zone and an internal reflux pump, the clear water zone is arranged at the top of the reactor, the mud-water separation zone is arranged below the clear water zone in the reactor, the buffer zone is arranged at the bottom of the mud-water separation zone, and the reaction zone is arranged in the internal reflux pump. A reaction zone is arranged below the buffer zone in the reactor, and a water distribution zone is arranged below the reaction zone in the reactor. Inclined tube filler is arranged in a mud-water separation area in the reactor, suspended filler is arranged in a reaction area in the reactor, and a buffer area and a water distribution area form a closed loop through an internal reflux pump. According to the fluidized bed type sulfur autotrophic reactor, the suspended filler is added into the fluidized bed type sulfur autotrophic reactor and is fixed in the reaction area, and sulfur autotrophic bacteria can be attached to the filler, so that the concentration of microorganisms in the reactor is improved, mud is not easy to run, and meanwhile, the denitrification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to sewage treatment, and in particular to a novel sulfur autotrophic denitrification reactor. Background Art

[0002] At present, deep denitrification mainly uses biological denitrification. Traditional heterotrophic denitrification requires a carbon source, but the carbon and nitrogen content of secondary effluent from sewage treatment plants and some industrial wastewater is relatively low, and there are few bioavailable carbon sources, which cannot meet the needs of heterotrophic denitrification. Adding an external carbon source will greatly increase the treatment cost. Insufficient carbon source has become an important factor restricting the efficiency of heterotrophic denitrification. At the same time, the large-scale growth of heterotrophic microorganisms leads to large sludge production and easy blockage of the reactor.

[0003] Sulfur autotrophic denitrification is a process in which elemental sulfur provides an electron donor and nitrate or nitrite is used as an electron acceptor under anaerobic conditions and is reduced to nitrogen gas. The stoichiometric formula is as follows:

[0004] 1.1S+NO3-+0.76H2O+0.4CO2+0.08NH4+-----------0.08C5H7O2N+1.1SO42-+0.5N2+1.28H+

[0005] Sulfur autotrophic denitrification has the characteristics of low sludge production, low operating cost, and no need for external carbon source.

[0006] Sulfur autotrophic denitrification reactors are divided into two types: fixed bed reactors and fluidized bed reactors:

[0007] The fixed bed sulfur autotrophic reactor is to fill the reactor with microorganisms and reaction fillers to form a stable filler bed. Wastewater enters the reactor from the bottom and is treated under certain conditions. The fixed bed reactor has the advantages of small footprint, simple structure, high efficiency, easy operation, and easy formation of anaerobic environment inside the reactor; however, a large amount of reaction fillers must be added at one time, and the fillers must be replenished regularly and the filler bed must be backwashed to prevent the fillers from clogging; and after a long period of operation, there is a problem of filler hardening.

[0008] The fluidized bed sulfur autotrophic reactor is to add microorganisms and sulfur powder into the reactor, set an internal reflux outlet at the top of the reactor, and the internal reflux effluent enters from the bottom of the reactor together with the inlet water. Relying on the high rising velocity in the reactor, the wastewater is fully mixed with the microorganisms and sulfur powder in the reactor to treat the wastewater. The fluidized bed reactor does not need to be filled with a large amount of filler at one time, and does not need to be backwashed; but it needs internal reflux and regular replenishment of alkalinity and sulfur powder; because sulfur powder is insoluble in water, when the rising velocity in the reactor is high, there will be mud running. When the flow rate in the reactor is low, the sulfur powder cannot fully contact with the microorganisms and wastewater, and the removal efficiency of nitrate nitrogen is not high. In this regard, this plan specially proposes a new type of sulfur autotrophic denitrification reactor to solve the above problems. Utility Model Content

[0009] In order to overcome the defects of inputting a large amount of sulfur particle filler at one time and improve the removal efficiency of nitrate nitrogen, the fluidized bed sulfur autotrophic reactor is improved. The utility model proposes a novel sulfur autotrophic denitrification reactor to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the technical scheme of the utility model is implemented as follows: a novel sulfur autotrophic denitrification denitrification reactor, comprising a clean water zone, a mud-water separation zone, a buffer zone, a reaction zone, a water distribution zone and an internal reflux pump, wherein the top of the reactor is set as the clean water zone, the bottom side of the clean water zone in the reactor is set as the mud-water separation zone, the bottom side of the mud-water separation zone is provided with the buffer zone, the bottom side of the buffer zone in the reactor is provided with the reaction zone, the bottom side of the reaction zone in the reactor is provided with the water distribution zone, an inclined tube filler is provided in the mud-water separation zone in the reactor, a suspended filler is provided in the reaction zone in the reactor, and the buffer zone forms a closed loop with the water distribution zone through the internal reflux pump.

[0011] Preferably, the output of the buffer zone is connected to the water distribution area through the internal reflux pump.

[0012] Preferably, the water from the water inlet, the sulfur powder from the sulfur powder replenishing port, the alkalinity from the alkalinity replenishing port and the reflux liquid from the internal reflux pump merge into the water distribution area.

[0013] Preferably, the clean water zone in the reactor is provided with a pH detector to detect the acidity and alkalinity of the solution in the clean water zone.

[0014] Preferably, the clean water zone in the reactor is provided with an ORP to monitor the redox performance of the solution in the clean water zone.

[0015] Preferably, a water outlet is provided on one side of the clean water zone in the reactor.

[0016] The beneficial effects of the utility model are embodied in:

[0017] The utility model adds suspended fillers into a fluidized bed sulfur autotrophic reactor and fixes the suspended fillers in a reaction zone, so that sulfur autotrophic bacteria can adhere to the fillers, thereby increasing the concentration of microorganisms in the reactor and preventing sludge from flowing, thereby increasing denitrification efficiency, increasing the sludge concentration in the reaction zone and preventing sludge from flowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture:

[0019] Figure 1 This is a schematic diagram of the structure of the utility model.

[0020] Description of reference numerals:

[0021] 1. Clean water area; 2. Mud-water separation area; 3. Buffer zone; 4. Reaction zone; 5. Water distribution zone; 6. Internal reflux pump; 7. Water inlet; 8. Sulfur powder supplement port; 9. Alkalinity supplement port; 10. Water outlet; 11. Inclined tube filler; 12. Suspended filler. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, "multiple" means more than two. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] Embodiment: A novel sulfur autotrophic denitrification reactor according to an embodiment of the utility model comprises a clean water zone 1, a mud-water separation zone 2, a buffer zone 3, a reaction zone 4, a water distribution zone 5 and an internal reflux pump 6, characterized in that the top of the reactor is set as the clean water zone 1, the bottom side of the clean water zone 1 in the reactor is set as the mud-water separation zone 2, the bottom side of the mud-water separation zone 2 away from the clean water zone 1 is provided with a buffer zone 3, the bottom side of the buffer zone 3 in the reactor is provided with a reaction zone 4, and the bottom side of the reaction zone 4 in the reactor is provided with a water distribution zone 5. In the reactor, an inclined tube filler 11 is arranged in the mud-water separation zone 2, and a suspended filler 12 is arranged in the reaction zone 4. The buffer zone 3 forms a closed loop with the water distribution zone 5 through an internal reflux pump 6, so as to avoid a large amount of sulfur granular filler being added at one time and improve the removal efficiency of nitrate nitrogen. The fluidized bed sulfur autotrophic reactor is improved, and a suspended filler is added to the fluidized bed sulfur autotrophic reactor, and the suspended filler is fixed in the reaction zone, so that the sulfur autotrophic bacteria can attach to the filler, thereby increasing the concentration of microorganisms in the reactor, preventing mud from running easily, and improving the denitrification efficiency.

[0026] refer to Figure 1 The output of the buffer zone 3 is connected to the water distribution area 5 through the internal reflux pump 6. A water inlet 7, a sulfur powder replenishing port 8 and an alkalinity replenishing port 9 are added when entering the water distribution area 5. The water inlet 7, the sulfur powder replenishing port 8 and the alkalinity replenishing port 9 are combined with the reflux liquid of the internal reflux pump 6 to the water distribution area 5, and the internal alkalinity and sulfur powder are injected. A PH detector is provided in the clean water area 1 in the reactor to detect the acidity and alkalinity of the solution in the clean water area 1. An ORP is provided in the clean water area 1 in the reactor to monitor the redox performance of the solution in the clean water area 1. A water outlet 10 is provided on one side of the clean water area 1 in the reactor to achieve drainage. The structure is simple and stable.

[0027] When in use, a suspended filler is added to a fluidized bed sulfur autotrophic reactor and fixed in the reaction zone. The sulfur autotrophic bacteria can attach to the filler, thereby increasing the concentration of microorganisms in the reactor and preventing sludge from running, thereby increasing the denitrification efficiency and the sludge concentration in the reaction zone.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel sulfur autotrophic denitrification reactor, comprising a clean water zone (1), a mud-water separation zone (2), a buffer zone (3), a reaction zone (4), a water distribution zone (5) and an internal reflux pump (6), characterized in that: The top of the reactor is provided as the clean water zone (1), the bottom of the clean water zone (1) in the reactor is provided as the mud-water separation zone (2), the bottom side of the mud-water separation zone (2) is provided with the buffer zone (3), the reactor is provided with the reaction zone (4) below the buffer zone (3), the reactor is provided with the water distribution zone (5) below the reaction zone (4), the reactor is provided with an inclined tube filler (11) in the mud-water separation zone (2), the reactor is provided with a suspended filler (12) in the reaction zone (4), and the buffer zone (3) forms a closed loop with the water distribution zone (5) via the internal reflux pump (6).

2. A novel sulfur autotrophic denitrification reactor according to claim 1, characterized in that: The output of the buffer zone (3) is connected to the water distribution area (5) through the internal reflux pump (6).

3. A novel sulfur autotrophic denitrification reactor according to claim 1, characterized in that: A water inlet (7), a sulfur powder replenishing port (8) and an alkalinity replenishing port (9) are added when entering the water distribution area (5); the water inlet (7), the sulfur powder replenishing port (8) and the alkalinity replenishing port (9) merge with the reflux liquid of the internal reflux pump (6) and then enter the water distribution area (5).

4. A novel sulfur autotrophic denitrification reactor according to claim 1, characterized in that: The clean water zone (1) in the reactor is provided with a pH detector to detect the acidity or alkalinity of the solution in the clean water zone (1).

5. The novel sulfur autotrophic denitrification reactor according to claim 1 is characterized in that: The clean water zone (1) in the reactor is provided with an ORP to monitor the redox performance of the solution in the clean water zone (1).

6. The novel sulfur autotrophic denitrification reactor according to claim 1 is characterized in that: In the reactor, a water outlet (10) is provided on one side of the clean water zone (1).

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