CN215516819U

CN215516819U - A/O + SBR sewage treatment device

Info

Publication number: CN215516819U
Application number: CN202122322649.3U
Authority: CN
Inventors: 王铁军; 王丽君; 杨腾辉; 郑雪丹
Original assignee: Henan Junhe Environmental Engineering Co ltd
Current assignee: Henan Junhe Environmental Engineering Co ltd
Priority date: 2021-09-25
Filing date: 2021-09-25
Publication date: 2022-01-14
Anticipated expiration: 2031-09-25

Abstract

The utility model belongs to the technical field of sewage treatment, in particular to an A/O + SBR sewage treatment device, wherein two partition walls are arranged in a treatment tank, the two partition walls divide the inner space of the treatment tank into an anoxic tank, an aerobic tank and three independent SBR tanks in sequence, a water inlet flap valve, a movable drainage weir and a nitrified liquid reflux pump are arranged at each SBR tank, the water inlet flap valve is arranged at the upper part of the partition wall between the SBR tank and the aerobic tank, the movable drainage weir is arranged on the tank wall of the treatment tank, the nitrified liquid reflux pump is arranged at the bottom of the SBR tank, the liquid discharge end of the nitrified liquid reflux pump is respectively connected to the inside of the anoxic tank and the outside of the treatment tank through pipelines, and an oxygen charging and aerating device is also arranged in each SBR tank; the combined process absorbs the advantages that the A/O process can not only degrade organic matters but also remove nitrogen and phosphorus, and the SBR process can realize an ideal static precipitation state and has a good precipitation effect, fully utilizes the advantages of the A/O process and the SBR process, and solves the requirement that the A/O process needs to be provided with a secondary precipitation tank independently.

Description

A/O + SBR sewage treatment device

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to an A/O + SBR sewage treatment device.

Background

In the field of sewage treatment, the application of an A/O process is particularly wide, the A/O process is also called an anoxic (anaerobic) aerobic process, A is an anoxic (anaerobic) section and is used for nitrogen and phosphorus removal; and O is an aerobic section used for removing organic matters in water. Its advantages are degradation of organic pollutant and certain functions of removing N and P.

The A/O process connects the front anoxic section and the rear aerobic section in series, heterotrophic bacteria in the anoxic section hydrolyze suspended pollutants such as starch, fiber, carbohydrate and the like and soluble organic matters in the sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anoxic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved; in an anoxic section, heterotrophic bacteria ammoniate pollutants such as protein and fat, ammonia (NH 3 and NH4 +) is liberated, NH3-N (NH 4 +) is oxidized into NO 3-by nitrification of autotrophic bacteria under the condition of sufficient oxygen supply, the NO 3-is returned to the pool A through backflow control, NO 3-is reduced into molecular nitrogen (N2) by denitrification of heterotrophic bacteria under the anoxic condition, ecological circulation of C, N, O is completed, and sewage harmless treatment is realized.

According to the treatment scale, the sedimentation tank can be co-built with the A/O system on a small scale, and the sedimentation tank needs to be separately arranged on a large scale, so that the whole floor area of the whole A/O treatment system is invisibly increased, the investment cost is increased, but in any form, the design of the sedimentation tank needs to meet the special design specification, and the parameters such as surface load, hydraulic retention time, mud bucket size and the like need to meet the design specification.

The SBR process is also called an intermittent aeration activated sludge method or a sequencing batch activated sludge process, and is called the SBR process for short. The system is mainly characterized in that a batch of reaction tanks process sewage in batch, and each reaction tank has the functions of an aeration tank and a secondary sedimentation tank by adopting an intermittent operation mode, so that the secondary sedimentation tank and a sludge backflow section are not arranged.

The whole treatment process of the SBR sewage treatment process is actually controlled and operated in one reactor. After entering the reaction tank, sewage is treated in different orders, and generally, one control operation cycle of the SBR reaction tank comprises 5 stages: the water inlet period, the aeration and oxygenation period, the sedimentation period, the drainage period and the idle period can be omitted; when the SBR process is operated, the operation time of 5 procedures, the volume, the concentration, the operation state and the like of the mixed liquid in the reactor can be flexibly mastered according to the sewage property, the effluent quality and the operation function requirement.

The SBR tank has the greatest advantage of good sedimentation effect, and all treatment links are carried out in one water tank, so that water does not enter and aeration does not occur in the sedimentation stage, the time required by sedimentation can be ensured, and an ideal static sedimentation state is realized. However, due to the structure, the volume utilization rate of the SBR single tank is low, only 70% of the time is subjected to aeration biological reaction in one water inlet period, and the rest time is used for sedimentation and drainage, so that the requirements of water treatment quantity and water quality are met, the quantity and the volume of the tank body are increased invisibly, and the civil engineering investment cost is increased.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides an A/O + SBR sewage treatment device, which absorbs the advantages that an A/O process can not only degrade organic matters but also remove nitrogen and phosphorus, and the SBR process can realize an ideal static precipitation state and has a good precipitation effect, the advantages of the A/O process and the SBR process are fully utilized, the requirement that a secondary precipitation tank needs to be independently arranged in the A/O process is solved, the SBR tank is used as the secondary precipitation tank at the rear end of the A/O process, the SBR tank is divided into three lattices, the functions of water inlet aeration, standing precipitation and drainage are respectively and circularly and alternately realized, and the three lattices of the water tank can realize 24h continuous operation of sewage treatment according to the reasonable configuration of respective working procedures in time; the spatial combination with the front-end A/O process is also a complete treatment process, and effectively degrades organic pollutants such as COD, NH3-N and the like in water.

In order to achieve the purpose, the utility model provides the following technical scheme: an A/O + SBR sewage treatment device comprises a treatment tank, wherein two partition walls are arranged in the treatment tank and divide the inner space of the treatment tank into an anoxic tank, an aerobic tank and a SBR treatment area in sequence, the SBR treatment area comprises three independent SBR tanks, each SBR tank is separated from the aerobic tank by a partition wall between the aerobic tank and the SBR treatment area, and each SBR tank is provided with a water inlet flap valve, a movable drainage weir and a nitrified liquid reflux pump, the water inlet flap valve is arranged at the upper part of a partition wall between the SBR tank and the aerobic tank, the movable drainage weir is arranged on the wall of the treatment tank and is used for discharging supernatant liquid precipitated at the upper part of the SBR tank out of the treatment tank, the nitrifying liquid reflux pump is arranged at the bottom of the SBR tank, and the liquid discharge end of the nitrifying liquid reflux pump is respectively connected to the inside of the anoxic tank and the outside of the treatment tank through pipelines, and an oxygenation aeration device is also arranged in each SBR tank.

Preferably, the volume of the three separate SBR tanks is the same.

Preferably, the volume size in the SBR treatment area is one ninth of that of the aerobic tank.

Compared with the prior art, the utility model has the beneficial effects that:

the combined process absorbs the advantages that the A/O process can not only degrade organic matters but also remove nitrogen and phosphorus, and the SBR process can realize an ideal static precipitation state and has a good precipitation effect, the advantages of the A/O process and the SBR process are fully utilized, the requirement that the A/O process needs to be provided with a secondary precipitation tank independently is solved, the SBR tank is used as the secondary precipitation tank at the rear end of the A/O process, the SBR tank is divided into three grids, the functions of water inlet aeration, standing precipitation and water drainage are realized respectively and circularly, and the three-grid water tank can realize 24h continuous operation of sewage treatment according to the reasonable configuration of respective working procedures in time; the combined treatment process is a complete treatment process which is combined with the front-end A/O process in space, effectively degrades organic pollutants such as COD, NH3-N and the like in water, cancels a separate secondary sedimentation tank, saves civil engineering investment and occupied area, combines nitrification liquid reflux which is originally required to be carried out in an aerobic tank in the A/O process and sludge reflux which is carried out in the secondary sedimentation tank into a whole, cancels a sludge reflux pump, and saves equipment investment and later-period operating cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic plan view of a treatment tank;

FIG. 2 is a schematic sectional view of the treatment tank;

in the figure: 1 treatment pool, 2 partition walls, 3 anoxic pool, 4 aerobic pool, 5SBR pool, 6 water inlet flap valve, 7 movable drainage weir and 8 nitrifying liquid reflux pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-2, the present embodiment provides the following technical solutions: an A/O + SBR sewage treatment device comprises a treatment tank 1, wherein two partition walls 2 are arranged in the treatment tank 1, the two partition walls 2 sequentially divide the inner space of the treatment tank 1 into an anoxic tank 3, an aerobic tank 4 and a SBR treatment area, the SBR treatment area comprises three independent SBR tanks 5 with the same volume, the volume of the SBR treatment area is one ninth of that of the aerobic tank 4, each SBR tank 5 is separated from the aerobic tank 4 through the partition wall 2 between the aerobic tank 4 and the SBR treatment area, a water inlet flap valve 6, a movable drainage weir 7 and a nitrifying liquid reflux pump 8 are arranged at each SBR tank 5, the water inlet flap valve 6 is arranged at the upper part of the partition wall 2 between the SBR tank 5 and the aerobic tank 4, the water inlet flap valve 6 adopts a water inlet pneumatic flap valve, the movable drainage weir 7 is arranged on the tank wall of the treatment tank 1 and is used for discharging supernatant after the upper part of the SBR tank 5 is settled out of the treatment tank 1 or discharging the supernatant after reaching the standard, nitrify liquid reflux pump 8 and install in the bottom of SBR pond 5, and nitrify liquid reflux pump 8's flowing back end and be connected to the inside of oxygen deficiency pond 3 and the outside of handling basin 1 respectively through the pipeline, still all be provided with in every SBR pond 5 and oxygenate aeration equipment.

The three water inlet flap valves 6 are controlled by time, one water inlet flap valve 6 is always kept to be opened, the other two water inlet flap valves 6 are closed, namely when one grid SBR pool 5 is used as a water inlet aeration stage, the water inlet flap valve 6 at the position is opened, sewage in the aerobic pool 4 automatically flows into the SBR pool 5, the sewage and the SBR pool 5 are oxygenated and aerated together, the other two grid SBR pools 5 are respectively in a standing precipitation stage and a drainage stage, the flap valves at the two positions are closed, the sewage in the front-end aerobic pool 4 is ensured not to enter, so that hydraulic disturbance is not caused in the standing precipitation stage to influence the precipitation effect, impact and short flow on effluent supernatant are also ensured not to be caused, the effluent quality is ensured to be stably discharged outside, and the three flap valves work in turn in a 24-hour circulating mode according to a water inlet program.

The three-grid SBR pool 5 is sequentially used in the water inlet aeration stage, the standing precipitation stage and the water drainage stage in turn, when one grid is used as the water inlet aeration stage, the part is combined with the whole aerobic pool 4 into a whole to be used as an aerobic treatment unit, and through oxygenation aeration and stirring, aerobic biological reaction is carried out in the SBR pool 5 equivalent to sewage in the aeration process, so that the pool capacity of the aerobic pool 4 is increased, the aerobic retention time of the sewage is increased, and organic pollutants and nitrogen oxide compounds in the sewage are further degraded; the third grid SBR pool 5 in the drainage stage is used as a secondary sedimentation pool, and supernatant liquid after upper sedimentation is discharged out of the pool through a movable drainage weir 7 arranged in the pool; the SBR pool 5 in the second grid in the standing and settling stage waits for entering the next drainage period to be used as a drainage stage; the three lattices are alternately and circularly carried out, and the continuous operation of sewage treatment for 24 hours is ensured.

When each grid SBR pool 5 is in a water inlet aeration stage, a nitrifying liquid reflux pump 8 arranged at the bottom of the pool is used for refluxing mixed liquid after aerobic biochemical treatment at the front end in the pool to the oxygen-poor pool 3 at the most front end for denitrification biological denitrification reaction, meanwhile, when each grid SBR pool 5 is in a water discharge stage, the upper part is used for discharging water, the lower part is used for refluxing a part of precipitated sludge at the bottom to the oxygen-poor pool 3 at the front end through the nitrifying liquid reflux pump 8 so as to supplement the sludge concentration in the oxygen-poor pool 3 at the front end, the normal treatment efficiency of the oxygen-poor pool 3 is ensured, and the other part can be discharged with the nitrifying liquid reflux pump 8 through valve switching.

The specific operation steps are as follows: supposing that the three SBR tanks 5 are an SBR tank No. 1 5, an SBR tank No. 2 5 and an SBR tank No. 3 in sequence, when the SBR tank No. 1 is in a water inlet aeration stage, the SBR tank No. 1 is taken as a continuation of an aerobic tank 4 and becomes a part of an aerobic treatment link, at the moment, a nitrifying liquid reflux pump 8 in the SBR tank No. 1 is started, nitrifying liquid subjected to nitration in the SBR tank No. 1 is refluxed to an anoxic tank 3 at the front end, the dissolved oxygen in the tank is controlled to be 0-0.5mg/l under an anoxic environment, the nitrifying liquid is mixed by mechanical stirring, biological denitrification is carried out by denitrifying bacteria in the anoxic tank 3, and nitrogen oxides in sewage are removed; at this moment, the SBR tank 5 No. 2 is in a standing precipitation stage, the nitrifying liquid reflux pump 8 positioned in the tank does not work, the SBR tank 5 No. 3 is in a drainage stage, the movable drainage weir 7 positioned in the tank is in a working state, drainage work is carried out, the nitrifying liquid reflux pump 8 positioned in the SBR tank 5 No. 3 is simultaneously started, the anoxic tank 3 which can reflux a part of precipitated sludge to the front end is used for supplementing the sludge concentration in the anoxic tank 3 at the front end, the normal treatment efficiency of the anoxic tank 3 is ensured, the residual sludge can be discharged to a sludge concentration tank through valve switching, and sludge dewatering is carried out.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a AO + SBR sewage treatment plant which characterized in that: comprises a treatment tank (1), two partition walls (2) are arranged in the treatment tank (1), the inner space of the treatment tank (1) is sequentially separated into an anoxic tank (3), an aerobic tank (4) and an SBR treatment area by the two partition walls (2), three independent SBR tanks (5) are arranged in the SBR treatment area, each SBR tank (5) is separated from the aerobic tank (4) by the partition walls (2) between the aerobic tank (4) and the SBR treatment area, a water inlet flap valve (6), a movable drainage weir (7) and a nitrified liquid reflux pump (8) are arranged at each SBR tank (5), the water inlet flap valve (6) is arranged at the upper part of the partition wall (2) between the SBR tank (5) and the aerobic tank (4), the movable drainage weir (7) is arranged on the tank wall of the treatment tank (1) and used for discharging supernatant liquid after the upper part of the SBR tank (5) is settled out of the treatment tank (1), and the nitrified liquid reflux pump (8) is arranged at the bottom of the SBR tank (5), and the liquid discharge end of the nitrifying liquid reflux pump (8) is respectively connected to the inside of the anoxic tank (3) and the outside of the treatment tank (1) through pipelines, and an oxygenation aeration device is also arranged in each SBR tank (5).

2. The A/O + SBR sewage treatment device of claim 1, wherein: the volumes of the three independent SBR pools (5) are the same.

3. The A/O + SBR sewage treatment device of claim 2, wherein: the volume of the SBR treatment area is one ninth of that of the aerobic tank (4).