CN-121990717-A - Circulation type continuous flow aerobic granular sludge sewage treatment system

CN121990717ACN 121990717 ACN121990717 ACN 121990717ACN-121990717-A

Abstract

The application discloses a circulating continuous flow aerobic granular sludge sewage treatment system, which relates to the technical field of sewage treatment and comprises a structural pond, wherein an inner cavity is formed and is divided into a deoxidization cavity, an anaerobic cavity, an anoxic laminar flow cavity and a composite cavity, one end of a water inlet mechanism is communicated with sewage, the other end of the water inlet mechanism is communicated with the deoxidization cavity, one end of a water outlet mechanism is communicated with the composite cavity, an overflow port communicated with the anaerobic cavity is formed in the upper part of the deoxidization cavity, a communication port communicated with the anoxic laminar flow cavity is formed in the bottom of the anaerobic cavity, a deep pond homogenizing circulating mixing module is arranged in the anoxic laminar flow cavity, the composite cavity is divided into a plurality of communicated subchambers, the subchambers are respectively an aerobic cavity and a sedimentation screening cavity, the anoxic laminar flow cavity is communicated with the aerobic cavity, the sedimentation screening cavity is communicated with the water outlet mechanism, and a sludge interception device is arranged below the water outlet position of the sedimentation screening cavity. The application has the effects of reducing the sewage treatment cost and improving the stability and efficiency of sewage treatment.

Inventors

Deng Genming
LIAO FENGZHEN
ZHU XUELIANG
NI KANGXIANG
MA DONGFANG
YANG ZHONGYANG
XIE YONGGUI
HU YOUHUA

Assignees

广东北控石犀科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260303

Claims (10)

1. A circulation type continuous flow aerobic granular sludge sewage treatment system, which is characterized by comprising: The structure pool (1) is provided with an inner cavity which is radially divided into a deoxidization cavity (11), an anaerobic cavity (12), an anoxic laminar cavity (13) and a composite cavity (14) from inside to outside; A water inlet mechanism (2) with one end communicated with sewage and the other end communicated with the deoxidizing cavity (11), and One end of the water outlet mechanism (3) is communicated with the composite cavity (14); The anaerobic treatment device comprises a deoxygenation cavity (11), an anaerobic cavity (12), a deep pool homogenizing circulation mixing module (5) and a flow control device, wherein an overflow port is arranged at the upper part of the deoxygenation cavity (11) and is communicated with the anaerobic cavity (12), a communication port is arranged at the bottom of the anaerobic cavity (12) and is communicated with an anoxic laminar flow cavity (13), and a deep pool homogenizing circulation mixing module (5) for circulating sewage up and down is arranged at the bottom of the anoxic laminar flow cavity (13); The composite cavity (14) is divided into a plurality of subchambers along the circumferential direction, the plurality of subchambers are divided into two types of cavities, namely an aerobic cavity (141) and a sedimentation screening cavity (142), the aerobic cavity (141) is communicated with the sedimentation screening cavity (142), and the anoxic laminar flow cavity (13) is communicated with the aerobic cavity (141); The upper part of the sedimentation screening cavity (142) is communicated with the water outlet mechanism (3), and a sludge interception screening device (6) is arranged below the water outlet position of the sedimentation screening cavity (142).
2. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein a top frame (4) is arranged at the upper part of the structural pond (1), a controller (7) is arranged on the top frame (4), the controller (7) is electrically connected with a heavy sludge reflux device (8), one end of the heavy sludge reflux device (8) is communicated with the bottom of the sedimentation screening cavity (142), and the other end of the heavy sludge reflux device is communicated with the deoxidizing cavity (11).
3. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein the water inlet mechanism (2) comprises a sewage pump (21), a water inlet pipe (22) and a water distribution pipe (23), an input port of the sewage pump (21) is communicated with sewage, an output port of the sewage pump is communicated with the water inlet pipe (22), the water distribution pipe (23) is vertically arranged, and the other end of the water inlet pipe (22) is communicated with the upper end of the water distribution pipe (23).
4. A circulating continuous flow aerobic granular sludge sewage treatment system as claimed in claim 3, wherein the upper end of the water distribution pipe (23) is closed or the upper end is higher than the liquid level of the deoxidizing cavity (11).
5. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein a triangular cofferdam is arranged at the upper edge of the deoxidization cavity (11), and the overflow port is formed between two adjacent triangular structures of the triangular cofferdam.
6. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 2, wherein the deep pool homogenizing circulation mixing module (5) comprises a base (51), a denitrification mixing pushing unit I (52) rotatably connected with the base (51), a transmission mechanism I and a driving motor I (53), wherein the base (51) is arranged at the bottom of the anoxic laminar flow cavity (13), and the driving motor I (53) is arranged on the top frame (4) and is linked with the denitrification mixing pushing unit I (52) through the transmission mechanism I.
7. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 6, wherein a rotational flow module (9) is arranged at the upper part of the anoxic layer flow cavity (13), the rotational flow module (9) comprises a hanging frame (91), a denitrification mixing pushing unit II (92), a transmission mechanism II and a driving motor II (93), the hanging frame (91) is fixed at the bottom of the top frame (4), the lower end of the hanging frame extends into the sewage liquid level, the denitrification mixing pushing unit II (92) is rotatably connected with the hanging frame (91), and the driving motor II (93) is arranged on the top frame (4) and is linked with the denitrification mixing pushing unit II (92) through the transmission mechanism II.
8. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein an aeration mechanism (143) is arranged in the aerobic cavity (141), a circumferential through port is formed in a cavity wall plate between the aerobic cavity (141) and the sedimentation screening cavity (142), and the circumferential through port is positioned between the water outlet mechanism (3) and the sludge interception screening device (6).
9. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein the water outlet mechanism (3) comprises a positioning plate (31) and a water outlet pipe (32), one end of the water outlet pipe (32) penetrates through the positioning plate (31) upwards, the port is positioned below the liquid level, and the other end of the water outlet pipe is transversely bent and extended out of the structural pool (1).
10. The circulation type continuous flow aerobic granular sludge sewage treatment system according to claim 1, wherein the sludge interception and screening device (6) comprises an encapsulation shell (61), an inclined plate (62) and a flow guide pipe (63), the encapsulation shell (61) is of a hollow structure and is provided with an upper opening and a lower opening, the encapsulation shell (61) is circumferentially prolonged along a sedimentation and screening cavity (142), the inclined plate (62) is fixed in the encapsulation shell (61) and is obliquely arranged at the end, the upper end is close to the center of the structural pool (1), the lower end of the encapsulation shell (61) is provided with a pocket plate (64), an inner cavity with an upper opening is formed in the pocket plate (64) and is used for covering the front surface and the rear surface of the lower end of the inclined plate (62), and the flow guide pipe (63) is arranged below the pocket plate (64) and is communicated with the inner cavity of the pocket plate (64); The communication point of the aerobic cavity (141) and the sedimentation screening cavity (142) is positioned below the sludge interception screening device (6).

Description

Circulation type continuous flow aerobic granular sludge sewage treatment system Technical Field The application relates to the technical field of sewage treatment, in particular to a circulating continuous flow aerobic granular sludge sewage treatment system. Background The activated sludge process is one of the methods for biological sewage treatment, and the activated sludge process and its derivative modification process are one of the widely used methods for treating urban sewage. The activated sludge process is to continuously mix and culture sewage and various microorganism groups under the condition of artificial oxygenation to form activated sludge, and the activated sludge can decompose and remove organic pollutants in the sewage by utilizing biological condensation, adsorption and oxidation of the activated sludge. The aerobic granular sludge is one of the activated sludge, and in the alternative environments of oxygen/anoxic and the like, the microorganism forms compact spherical/ellipsoidal aggregate with excellent sedimentation performance through self-coagulation, no carrier exists, the particle size is usually 0.2-3mm, MLSS can reach 8000-10000mg/, the inside is in a core-shell microenvironment gradient, namely, the outer layer aerobic (nitrifying bacteria), the middle layer anoxic (denitrifying bacteria) and the inner core anaerobic (phosphorus accumulating bacteria/fermenting bacteria), the organic degradation, the nitrification denitrification, the biological phosphorus removal and the like can be synchronously realized, and the Extracellular Polymer (EPS) is the biological glue with stable particles. Compared with the traditional activated sludge flocs, the aerobic granular sludge has the advantages of regular shape, compact and compact structure, good sedimentation performance, higher biomass, multiple microorganism functions, smaller residual sludge, strong tolerance to biotoxin and organic load fluctuation and the like, and becomes one of the most promising wastewater biological treatment technologies. In the sewage treatment unit, if the mode of purchasing the aerobic granular sludge from the outside is always relied on, on one hand, the cost of sewage treatment is greatly increased, and on the other hand, the mode of adding the aerobic granular sludge after purchasing can also lead to relatively unstable sewage treatment effect, and after all, the sewage treatment effect is consumed as a consumable material with the lapse of time and the like. If aerobic granular sludge is automatically cultured, the traditional method is orderly batch SBR, but the method is an intermittent aeration operation process, the granulation is promoted by periodic circulation, the starting period is 30-90 days, five procedures of water inlet, aeration, precipitation, water discharge and standby are strictly completed in batches according to time sequence, the method belongs to intermittent operation, and the same reactor bears different functions at different time periods, so that the applicability is relatively poor when the treatment requirements of a large municipal sewage plant are met, and the application provides a new technical scheme. Disclosure of Invention In order to reduce the sewage treatment cost and improve the stability and efficiency of sewage treatment, the application provides a circulating flow type continuous flow aerobic granular sludge sewage treatment system. The application provides a circulating flow type continuous flow aerobic granular sludge sewage treatment system, which adopts the following technical scheme: A circulation type continuous flow aerobic granular sludge sewage treatment system comprises a structural pool, wherein an inner cavity is formed in the structural pool and is radially divided into a deoxidization cavity, an anaerobic cavity, an anoxic laminar flow cavity and a composite cavity from inside to outside; a water inlet mechanism with one end communicated with sewage and the other end communicated with the deoxidizing cavity, and One end of the water outlet mechanism is communicated with the composite cavity; The anaerobic treatment device comprises a deoxygenation cavity, an anaerobic cavity, a deep pool homogenizing circulation mixing module, a water inlet, a water outlet, a water inlet and a water outlet, wherein the upper part of the deoxygenation cavity is provided with an overflow port which is communicated with the anaerobic cavity; The composite cavity is divided into a plurality of subchambers along the circumferential direction, the plurality of subchambers are divided into two types and are respectively an aerobic cavity and a sedimentation screening cavity, and the aerobic cavity is communicated with the sedimentation screening cavity; The upper part of the sedimentation screening cavity is communicated with a water outlet mechanism, and a sludge interception screening device is arranged below the water outlet position of the sedimentation screenin