Sludge compact regeneration system

Abstract

The utility model discloses a dense sludge regeneration system and relates to the technical field of sludge treatment. Comprising a sewage inlet, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a water outlet, a sludge densification regeneration device, a sludge concentration tank, a sludge dewatering room and a sludge pump room, the anaerobic tank, the anoxic tank and the aerobic tank are sequentially connected, the anaerobic tank is connected with the sewage inlet through a pretreatment device, and the aerobic tank is connected with an air blower room and the secondary sedimentation tank. The secondary sedimentation tank is connected with a water outlet and a sludge pump room, returned sludge of the sludge pump room is conveyed to the anaerobic tank, the sludge dense regeneration device is respectively connected with the sludge pump room, the anaerobic tank and the sludge concentration tank, and the sludge pump room is also connected with the sludge dewatering room through the sludge concentration tank. The device is reasonable in structural design, good in use effect, high in investment return, easy to integrate and high in practicability, can perform biological phosphorus removal and improve the settling ratio of activated sludge, and reduces the addition of chemical agents.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge compact regeneration system. Background Art

[0002] At present, urban sewage treatment plants generally use high molecular flocculants (such as PAM) for conditioning, mainly through electrostatic adsorption, electrical neutralization and destabilization, bridging, netting and other forms of action to aggregate small and loose sludge particles into dense large particles, and then settle down under the action of gravity, and then dehydrate through high-speed centrifuges or belt filter presses. Only mud cakes with a moisture content of about 80% can be obtained, which is difficult to meet the standard requirements. In addition, the existing sludge treatment has poor stability, poor nitrogen and phosphorus removal effects, and poor effluent quality.

[0003] In summary, the utility model designs a sludge compaction regeneration system which improves the treatment effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a sludge dense regeneration system with reasonable structural design, good use effect, capable of biological phosphorus removal, improving the activated sludge settling ratio, good stability, reducing the addition of chemical agents, high return on investment, easy integration and strong practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a sludge density regeneration system, including a sewage inlet, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, an outlet, a sludge density regeneration device, a sludge thickening tank, a sludge dewatering room and a sludge pump room, the anaerobic tank, the anoxic tank and the aerobic tank are connected in sequence, the anaerobic tank is connected to the sewage inlet through a pretreatment device, the aerobic tank is respectively connected to the blower room and the secondary sedimentation tank, the secondary sedimentation tank is connected to the outlet and the sludge pump room, the return sludge of the sludge pump room is sent to the anaerobic tank, the sludge density regeneration device is respectively connected to the sludge pump room and the anaerobic tank, the sludge thickening tank, and the sludge pump room is also connected to the sludge dewatering room through the sludge thickening tank.

[0006] Preferably, a sludge pump is provided in the sludge pump room.

[0007] Preferably, the sludge density regeneration device sends the flocculent sludge to a sludge thickening tank.

[0008] Preferably, the sludge densification regeneration device sends the dense sludge to an anaerobic tank.

[0009] Beneficial effects of the utility model: The utility model has reasonable structural design, good use effect, can carry out biological phosphorus removal, improve the activated sludge settling ratio, good stability, reduce the addition of chemical agents, does not contain civil engineering, does not contain complex supporting equipment, and only adds an external dense sludge screener to improve sludge settling, denitrification and phosphorus removal capabilities, and improves effluent SS. It is easy to integrate into most activated sludge treatment processes such as oxidation ditch, A2 / O, CASS, CAST, MSBR, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods;

[0011] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0013] Reference Figure 1 The present specific implementation adopts the following technical scheme: a sludge dense regeneration system, comprising a sewage inlet 1, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4, a secondary sedimentation tank 5, an outlet 6, a sludge dense regeneration device 7, a sludge thickening tank 8, a sludge dewatering room 9 and a sludge pump room 10. The anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 are connected in sequence. The anaerobic tank 2 is connected to the sewage inlet 1 through a pretreatment device 11. The aerobic tank 4 is respectively connected to a blower room 12 and a secondary sedimentation tank 5. The secondary sedimentation tank 5 is connected to the outlet 6 and the sludge pump room 10. The return sludge of the sludge pump room 10 is sent to the anaerobic tank 2. The sludge dense regeneration device 7 is respectively connected to the sludge pump room 10 and the anaerobic tank 2 and the sludge thickening tank 8. The sludge pump room 10 is also connected to the sludge dewatering room 9 through the sludge thickening tank 8.

[0014] It is worth noting that a sludge pump 13 is provided in the sludge pump room 10 .

[0015] It is worth noting that the sludge density regeneration device 7 sends the flocculent sludge to the sludge thickening tank 8.

[0016] In addition, the sludge densification regeneration device 7 sends the dense sludge to the anaerobic tank 2.

[0017] The working principle of this specific implementation method: The sludge dense regeneration system continuously cultivates and selects dense heavy sludge with a large specific gravity to optimize the microbial population, improve the sludge sedimentation properties, and increase the microbial concentration in the reaction tank, so as to achieve the purpose of improving the biological denitrification and phosphorus removal effect, improving the effluent water quality, and increasing the sewage treatment capacity.

[0018] The sludge density regeneration system mainly promotes the formation of aerobic granular sludge through process adjustment and sludge screener. Without adding new sewage treatment structures and equipment (the sludge density regeneration system can also be newly built in the sludge regeneration equipment room), by setting a dense sludge screener on the return sludge pipeline of the secondary sedimentation tank, the activated sludge is physically divided into two parts, and the screened activated sludge with a larger specific gravity and a denser density is returned to the biochemical system for retention, while the lighter specific gravity and looser sludge part (such as filamentous bacteria, etc.) is discharged to the sludge concentration tank to be discharged from the activated sludge system.

[0019] The sludge after screening has a higher specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation properties; at the same time, the heavy sludge contains polyphosphate-accumulating bacteria (PAOs), ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB), denitrifying heterotrophic bacteria and even anaerobic ammonia-oxidizing bacteria (Anammox), which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0020] In this specific implementation, without changing the existing treatment process, the dense sludge screener naturally screens out PAOs with a relatively heavy specific gravity, allowing polyphosphate bacteria to dominate anaerobic phosphorus release and aerobic phosphorus absorption to improve phosphorus removal efficiency.

[0021] The dense sludge device of this specific embodiment screens and removes loose light sludge such as flocculent sludge, free bacteria, and filamentous bacteria, leaving heavy granular sludge with higher density to improve the activated sludge settling ratio. The cycle of seasonal sludge expansion is broken, and the secondary sedimentation tank and biochemical tank can better adapt to and withstand impact loads and hydraulic loads, and the operation stability of the sewage plant is better.

[0022] In this specific implementation method, relatively heavy activated sludge is screened and retained, which improves the sedimentation performance of the sludge, improves the effluent TSS of the secondary sedimentation tank, greatly reduces the dosage of flocculants and coagulants, improves the efficiency of nitrogen and phosphorus removal, and greatly reduces or even eliminates the amount of carbon source supplement.

[0023] This specific implementation method does not contain civil construction and complex supporting equipment. It only adds an external dense sludge screener to improve sludge settling properties, enhance nitrogen and phosphorus removal capabilities, and improve effluent SS. It is easy to integrate into most activated sludge treatment processes such as oxidation ditch, A2 / O, CASS, CAST, MSBR, etc.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. Sludge dense regeneration system, characterized in that: The invention comprises a sewage inlet (1), an anaerobic tank (2), an anoxic tank (3), an aerobic tank (4), a secondary sedimentation tank (5), an outlet (6), a sludge compaction regeneration device (7), a sludge concentration tank (8), a sludge dewatering room (9) and a sludge pump room (10). The anaerobic tank (2), the anoxic tank (3) and the aerobic tank (4) are connected in sequence. The anaerobic tank (2) is connected to the sewage inlet (1) through a pretreatment device (11). The aerobic tank (4) are respectively connected to the blower room (12) and the secondary sedimentation tank (5), the secondary sedimentation tank (5) is connected to the water outlet (6) and the sludge pump room (10), the return sludge from the sludge pump room (10) is sent to the anaerobic tank (2), the sludge density regeneration device (7) is respectively connected to the sludge pump room (10) and the anaerobic tank (2), and the sludge concentration tank (8), and the sludge pump room (10) is also connected to the sludge dewatering room (9) through the sludge concentration tank (8).

2. The sludge dense regeneration system according to claim 1, characterized in that: A sludge pump (13) is arranged in the sludge pump room (10).

3. The sludge dense regeneration system according to claim 1, characterized in that: The sludge density regeneration device (7) sends the flocculent sludge to the sludge concentration tank (8).

4. The sludge dense regeneration system according to claim 1, characterized in that: The sludge compaction regeneration device (7) delivers the compacted sludge to the anaerobic tank (2).

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