CN-224226817-U - Two-stage AAO biochemical tank structure

CN224226817UCN 224226817 UCN224226817 UCN 224226817UCN-224226817-U

Abstract

The utility model relates to the technical field of sewage treatment and discloses a two-stage AAO biochemical tank structure which comprises at least two biochemical tanks, a water inlet channel and a plurality of water inlet pipes, wherein the at least two biochemical tanks are arranged at intervals, each biochemical tank comprises a tank body and a top plate, the top plate is covered above the tank body, a sewage treatment cavity is defined between the tank body and the top plate, a water inlet and a water outlet are formed in the side wall of the tank body at intervals, the sewage treatment cavity comprises an anaerobic zone, an anoxic zone I, an aerobic zone I, an anoxic zone II and an aerobic zone II which are sequentially communicated, the water inlet is communicated with the anaerobic zone, the water outlet is communicated with the aerobic zone II, a water inlet channel is arranged on the bottom surface of the top plate, and the water inlet channel is respectively communicated with the anaerobic zone, the anoxic zone I and the anoxic zone II through the plurality of water inlet pipes. The utility model is beneficial to reducing the construction cost and increasing the space utilization rate of the biochemical pool when the number of the biochemical pool is required to be increased by changing the setting positions and the setting modes of the water inlet channels.

Inventors

LIU YUANJI
FANG JIANMING
LIN YIJING
FENG TENGFEI
CHEN WEIWEI
GUO SHANSHAN
Kuang Minyi
QI WEIFENG
TAN JINGWEN
PENG YUAN
HAN XIAOQING
LIU LI

Assignees

广州市城市规划勘测设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20250409

Claims (9)

1. The two-stage AAO biochemical tank structure is characterized by comprising at least two biochemical tanks, a water inlet channel and a plurality of water inlet pipes, wherein at least two biochemical tanks are arranged at intervals; The biochemical tank comprises a tank body and a top plate, wherein the top plate is covered above the tank body, a sewage treatment cavity is defined between the tank body and the top plate, and a water inlet and a water outlet are formed in the side wall of the tank body at intervals; The sewage treatment cavity comprises an anaerobic zone, an anoxic zone I, an aerobic zone I, an anoxic zone II and an aerobic zone II which are sequentially communicated, the water inlet is communicated with the anaerobic zone, and the water outlet is communicated with the aerobic zone II; The water inlet channel is arranged on the bottom surface of the top plate and is respectively communicated with the anaerobic zone, the anoxic zone I and the anoxic zone II through a plurality of water inlet pipes.
2. The two-stage AAO biochemical pond structure according to claim 1, wherein each of the water inlet pipes is connected with a control water valve.
3. The two-stage AAO biochemical pond structure according to claim 1, wherein the anaerobic zone, the anoxic zone I, the aerobic zone I, the anoxic zone II, and the aerobic zone II are annularly and sequentially distributed.
4. The two-stage AAO biochemical pond structure according to claim 1, further comprising an aeration channel and a plurality of aeration pipes, wherein the aeration channel is arranged on the bottom surface of the top plate, and the aeration channel is respectively communicated with the aerobic I zone and the aerobic II zone through the plurality of aeration pipes.
5. The two-stage AAO biochemical tank structure according to claim 4, wherein a plurality of aerators are arranged at the bottoms of the aerobic I zone and the aerobic II zone, and the aerators are communicated with the aeration channel through the aeration pipe.
6. The two-stage AAO biochemical pond structure according to claim 5, wherein the sewage treatment chamber further comprises a first adjusting zone, wherein the first adjusting zone is arranged between the anoxic zone I and the aerobic zone I, and is respectively communicated with the anoxic zone I and the aerobic zone I, a plurality of aerators and a plurality of flow pushers are arranged at the bottom of the first adjusting zone, and the aerators are communicated with the aeration channel through the aeration pipe.
7. The two-stage AAO biochemical tank structure according to claim 6, wherein the sewage treatment chamber further comprises a second adjusting zone, the second adjusting zone is arranged between the anoxic zone II and the aerobic zone II, two ends of the second adjusting zone are respectively communicated with the anoxic zone II and the aerobic zone II, a plurality of aerators and a plurality of flow pushers are arranged at the bottom of the second adjusting zone, and the aerators are communicated with the aeration channel through aeration pipes.
8. The two-stage AAO biochemical tank structure of claim 7, wherein the biochemical tank further comprises a mixed liquor reflux channel and a reflux pump, wherein the mixed liquor reflux channel is arranged in the sewage treatment cavity and is respectively communicated with the aerobic II zone and the anoxic I zone; The reflux pump is arranged in the mixed liquor reflux canal and is used for pumping the mixed liquor in the aerobic zone II into the anoxic zone I.
9. The two-stage AAO biochemical pond structure of any one of claims 1-8, further comprising a wall-through pump for pumping treated sludge into the anaerobic zone.

Description

Two-stage AAO biochemical tank structure Technical Field The utility model relates to the technical field of sewage treatment, in particular to a two-stage AAO biochemical tank structure. Background At present, a biochemical pool of an established underground sewage treatment plant in China generally adopts a two-grid independently operated multi-point water inlet two-stage AAO process. According to the process, the sewage is sequentially introduced into the anaerobic zone, the anoxic zone I, the aerobic zone I, the anoxic zone II and the aerobic zone II, so that the optimal distribution of carbon sources and the improvement of denitrification efficiency are realized. Wherein, the water inlet channel is laid in the pipe gallery in the middle of two grids, and a plurality of water inlet pipes are arranged to respectively distribute water to the anaerobic zone, the anoxic zone I and the anoxic zone II. With popularization and application of underground sewage treatment plants, a staged construction mode (civil construction is on a long-term scale and equipment is on a near-term scale) becomes the mainstream. Since the specification requires that the recent operation unit is divided into at least two independent operation cells, the total number of cells is often more than 3 cells after the long-term processing units are overlapped. Under the condition, the traditional multi-point water inlet system of the two-grid biochemical pond needs to be additionally provided with a middle pipe gallery for laying water inlet channels, so that the construction cost is obviously increased and the space utilization rate is reduced. Therefore, there is a need to develop a two-stage AAO biochemical pool structure suitable for multi-cell scenarios to solve the shortcomings of the conventional process in terms of expansibility and economy. Disclosure of utility model The utility model aims to provide a two-stage AAO biochemical tank structure so as to solve the problems in the background art. In order to achieve the aim, the application provides a two-stage AAO biochemical tank structure, which comprises at least two biochemical tanks, a water inlet channel and a plurality of water inlet pipes, wherein at least two biochemical tanks are arranged at intervals; The biochemical tank comprises a tank body and a top plate, wherein the top plate is covered above the tank body, a sewage treatment cavity is defined between the tank body and the top plate, and a water inlet and a water outlet are formed in the side wall of the tank body at intervals; The sewage treatment cavity comprises an anaerobic zone, an anoxic zone I, an aerobic zone I, an anoxic zone II and an aerobic zone II which are sequentially communicated, the water inlet is communicated with the anaerobic zone, and the water outlet is communicated with the aerobic zone II; The water inlet channel is arranged on the bottom surface of the top plate and is respectively communicated with the anaerobic zone, the anoxic zone I and the anoxic zone II through a plurality of water inlet pipes. As a preferable technical scheme, each water inlet pipe is connected with a control water valve. As a preferable technical scheme, the anaerobic zone, the anoxic zone I, the aerobic zone I, the anoxic zone II and the aerobic zone II are annularly and sequentially distributed. As a preferable technical scheme, the two-stage AAO biochemical tank structure further comprises an aeration channel and a plurality of aeration pipes, wherein the aeration channel is arranged on the bottom surface of the top plate, and the aeration channel is respectively communicated with the aerobic zone I and the aerobic zone II through the plurality of aeration pipes. As a preferable technical scheme, the bottoms of the aerobic zone I and the aerobic zone II are respectively provided with a plurality of aerators, and the aerators are communicated with the aeration channel through aeration pipes. As a preferable technical scheme, the sewage treatment cavity further comprises a first adjusting area, the first adjusting area is arranged between the anoxic I area and the aerobic I area, the first adjusting area is respectively communicated with the anoxic I area and the aerobic I area, a plurality of aerators and a plurality of pushers are arranged at the bottom of the first adjusting area, and the aerators are communicated with the aeration channel through aeration pipes. As a preferred technical scheme, the sewage treatment cavity further comprises a second regulation area, the second regulation area is arranged between the anoxic II area and the aerobic II area, two ends of the second regulation area are respectively communicated with the anoxic II area and the aerobic II area, a plurality of aerators and a plurality of flow pushing devices are arranged at the bottom of the second regulation area, and the aerators are communicated with the aeration channel through aeration pipes. As a preferable technical scheme, the