CN217809103U

CN217809103U - MABR integrated sewage treatment process and system with multiple water inlets and outlets

Info

Publication number: CN217809103U
Application number: CN202023255935.4U
Authority: CN
Inventors: 李庭青; 柴春燕; 滕军伟
Original assignee: Nanjing Zhidao Water Environment Technology Co ltd
Current assignee: Nanjing Zhidao Water Environment Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-11-15
Anticipated expiration: 2030-12-29

Abstract

The utility model belongs to the technical field of sewage treatment, especially, MABR integration sewage treatment process and system of multiple spot business turn over water, to the big problem of area, now propose following scheme, including primary treatment flow, secondary treatment flow and deep-processing flow, the primary treatment flow includes thick grid, thin grid and grit chamber, the secondary treatment flow includes MABR reaction tank, the deep-processing flow includes ozone contact tank and disinfection pond, thick grid and thin grid link to each other, thin grid and grit chamber link to each other, grit chamber and MABR reaction tank link to each other, MABR reaction tank and ozone contact tank link to each other, ozone contact tank and disinfection pond link to each other, MABR reaction tank includes intake shaft, anaerobic zone, one-level anoxic zone, one-level aerobic zone, second grade anoxic zone, MABR district, second grade aerobic zone and outlet shaft. The utility model discloses the treatment effeciency is high, it is good to go out water quality of water, and equipment is compact, area is little, easily realizes automatic control, operation management is simple.

Description

MABR integrated sewage treatment process and system with multiple water inlets and outlets

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a MABR integration sewage treatment process and system of multiple spot business turn over water.

Background

Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.

Most of the existing sewage treatment processes adopt an oxidation ditch or an AAO process as a main biological treatment process, but the oxidation ditch or the AAO process needs to be provided with an additional secondary sedimentation tank, so that the occupied area of the whole treatment process is larger, the MABR process is a novel water treatment technology combining a membrane separation unit and a biological treatment unit, a membrane component is used for replacing the terminal secondary sedimentation tank of the traditional biological treatment technology, the concentration of high-activity sludge is kept in a bioreactor, the organic load of biological treatment is improved, the occupied area of a sewage treatment facility is reduced, the residual sludge amount is reduced by keeping low sludge load, active sludge and macromolecular organic matters in water are mainly intercepted by utilizing membrane separation equipment, and due to the effective interception effect, microorganisms with longer generation period can be kept, the deep purification of sewage can be realized, meanwhile, nitrifying bacteria can be fully propagated in a system, the nitrification effect is obvious, and the deep dephosphorization and denitrification are possible; therefore, a sewage treatment process using the MABR process as a main biological treatment process is needed.

SUMMERY OF THE UTILITY MODEL

Based on the technical problem who proposes in the background art, the utility model provides a MABR integration sewage treatment process and system of multiple spot business turn over water.

The utility model provides an MABR integration sewage treatment system of multiple spot business turn over water, including primary treatment process, secondary treatment process and advanced treatment process, the primary treatment process includes thick grid, thin grid and grit chamber, the secondary treatment process includes MABR reaction tank, the advanced treatment process includes ozone contact tank and disinfection pond, thick grid and thin grid link to each other, thin grid and grit chamber link to each other, grit chamber and MABR reaction tank link to each other, MABR reaction tank and ozone contact tank link to each other, ozone contact tank and disinfection pond link to each other;

the MABR reaction tank comprises an inlet well, an anaerobic zone, a first-level anoxic zone, a first-level aerobic zone, a second-level anoxic zone, an MABR zone, a second-level aerobic zone and an outlet well, wherein the inlet well is connected with the anaerobic zone, the anaerobic zone is connected with the first-level anoxic zone, the first-level anoxic zone is connected with the first-level aerobic zone, the first-level aerobic zone is connected with the second-level anoxic zone, the second-level anoxic zone is connected with the MABR zone, the MABR zone is connected with the second-level aerobic zone, and the second-level aerobic zone is connected with the outlet well. The MABR membrane component replaces a secondary sedimentation tank to keep high active sludge concentration in a bioreactor, reduce the occupied area of sewage treatment facilities, and reduce the sludge amount by keeping low sludge load, so that the treatment efficiency is high, the effluent quality is good, the equipment is compact, the occupied area is small, the automatic control is easy to realize, and the operation management is simple; the secondary anoxic zone and the secondary aerobic zone are additionally arranged on the basis of the anaerobic zone, the primary anoxic zone and the primary aerobic zone, so that the biological reaction zone of the sewage is prolonged, the nitrogen and phosphorus removal is more thorough, and the sewage treatment effect is better.

Preferably, the grit chamber adopts a rotational flow grit chamber or an aeration grit chamber.

Preferably, the disinfection tank adopts an ultraviolet disinfection tank or a liquid chlorine disinfection tank.

The utility model provides a beneficial effect does:

1. the MABR integrated sewage treatment process and system with multi-point water inlet and outlet have the advantages that the MABR reaction tank is arranged, the MABR membrane component replaces a secondary sedimentation tank to keep high active sludge concentration in the bioreactor, the occupied area of sewage treatment facilities is reduced, the sludge amount is reduced by keeping low sludge load, the treatment efficiency is high, the effluent quality is good, the equipment is compact, the occupied area is small, automatic control is easy to realize, and the operation management is simple.

2. This MABR integration sewage treatment process and system of multiple spot business turn over water through being provided with second grade anoxic zone and second grade aerobic zone, has add second grade anoxic zone and second grade aerobic zone on the basis of anaerobic zone, one-level anoxic zone and one-level aerobic zone, makes the biological reaction district extension of sewage, and nitrogen and phosphorus removal is more thorough, and sewage treatment effect is better.

The parts not involved in the process are the same as or can be realized by the prior art.

Drawings

FIG. 1 is a flow chart of the MABR integrated sewage treatment process and system with multi-point water inlet and outlet provided by the utility model;

FIG. 2 is the MABR reaction tank flow chart of the MABR integrated sewage treatment process and system with multi-point water inlet and outlet provided by the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-2, an MABR integrated sewage treatment system with multi-point water inlet and outlet comprises a primary treatment process, a secondary treatment process and a deep treatment process, wherein the primary treatment process comprises a coarse grid, a fine grid and a grit chamber, the secondary treatment process comprises an MABR reaction tank, the deep treatment process comprises an ozone contact tank and a disinfection tank, the coarse grid is connected with the fine grid, the fine grid is connected with the grit chamber, the grit chamber is connected with the MABR reaction tank, the MABR reaction tank is connected with the ozone contact tank, and the ozone contact tank is connected with the disinfection tank;

MABR reaction tank includes the inlet shaft, the anaerobic zone, one-level anoxic zone, one-level aerobic zone, second grade anoxic zone, the MABR district, second grade aerobic zone and outlet shaft, the inlet shaft links to each other with the anaerobic zone, anaerobic zone and one-level anoxic zone link to each other, one-level anoxic zone and one-level aerobic zone link to each other, one-level aerobic zone and second grade anoxic zone link to each other, second grade anoxic zone and MABR district link to each other, MABR district and second grade aerobic zone link to each other, second grade aerobic zone and outlet shaft link to each other. The MABR membrane component replaces a secondary sedimentation tank to keep high activated sludge concentration in a bioreactor, reduce the occupied area of sewage treatment facilities, and reduce the sludge amount by keeping low sludge load, so that the treatment efficiency is high, the effluent quality is good, the equipment is compact, the occupied area is small, the automatic control is easy to realize, and the operation management is simple; the secondary anoxic zone and the secondary aerobic zone are additionally arranged on the basis of the anaerobic zone, the primary anoxic zone and the primary aerobic zone, so that the biological reaction zone of the sewage is prolonged, the nitrogen and phosphorus removal is more thorough, and the sewage treatment effect is better.

The utility model discloses in, the grit chamber adopts whirl grit chamber or aeration grit chamber.

In the utility model, the disinfection tank adopts an ultraviolet disinfection tank or a liquid chlorine disinfection tank.

The specific working principle comprises the following steps:

s1: the sewage enters the coarse grating, coarse suspended matters and impurities which possibly block a water pump unit and a pipeline valve in the sewage are removed, and normal operation of subsequent treatment facilities is ensured;

s2: the sewage passes through a fine grid to remove the remaining smaller suspended matters and impurities in the sewage;

s3: the sewage enters a grit chamber, sand in the sewage is removed by pre-settling separation on the basis of gravity separation, so that inorganic particles with large specific gravity sink, and organic suspended particles can be taken away along with water flow;

s4: sewage enters an intake well of the MABR pool, the sewage enters an anaerobic pool after being subjected to multi-point flow distribution through the intake well, facultative anaerobic zymogens convert biodegradable organic matters in the sewage into micromolecular fermentation products such as volatile fatty acid and the like, polyphosphate bacteria also release polyphosphate stored in bacteria and release energy at the same time, wherein part of the energy is used for the existence of obligate aerobic polyphosphate bacteria in an anaerobic inhibition environment, the other part of the energy is used for the polyphosphate bacteria to actively absorb fermentation products in the sewage similar to the volatile fatty acid and the like and store the products in the bacteria in the form of poly-beta-hydroxy alkanoic acid, and part of carbon is removed in an anaerobic zone;

s5: after staying for a certain time in the anaerobic zone, the sewage enters a first-stage anoxic zone, and denitrifying bacteria carry out denitrification reaction by utilizing a large amount of nitrate brought by the backflow of the mixed liquor from the aerobic zone and biodegradable organic matters in the sewage, so that the aims of simultaneous decarbonization and denitrification are fulfilled;

s6: after staying for a certain time in the primary anoxic zone, the sewage containing carbon nitrogen with lower concentration and phosphorus with higher concentration enters the primary aerobic zone, the phosphorus-accumulating bacteria decompose poly-beta-hydroxyalkanoic acid stored in the body under the aeration and oxygenation conditions and release energy for thallus growth and actively absorb soluble phosphorus in the surrounding environment in excess, the absorbed soluble phosphorus exists in the phosphorus-accumulating bacteria in the form of polyphosphate, so that the concentration of phosphorus in the sewage is greatly reduced, the nitrifying bacteria complete ammoniation and nitrification under the aerobic environment and convert nitrogen in the water into NO ² -and NO ^3- ；

S7: after staying in the first-stage aerobic zone for a certain time, the sewage can produce NO ^x- Carrying into a secondary anoxic zone for denitrification;

s8: after the sewage stays for a certain time in the secondary anoxic zone, the sewage enters the MABR zone to degrade organic pollutants and separate sludge and water, microorganisms with longer generation period can be reserved by the effective interception function of the MABR membrane group, the sewage can be deeply purified, meanwhile, nitrifying bacteria can be fully propagated in the MABR zone, the nitrification effect is obvious, and deep phosphorus and nitrogen removal is carried out;

s9: after staying for a certain time in the MABR area, the sewage enters a secondary aerobic area for complete final dephosphorization and denitrification, and then enters a water outlet well to finish water outlet;

s10: the sewage enters an ozone contact tank, so that ozone gas is diffused into the sewage and is in full contact with the water, and strong oxidation is carried out on bacteria and pathogens in the sewage to achieve the effect of advanced treatment;

s11: and (4) the sewage enters a disinfection tank for final sterilization and disinfection, and the sewage after reaching the standard is treated and discharged.

The thick grating and the thin grating are both composed of one or more groups of parallel metal grating bars and frames, and the thick grating and the thin grating are obliquely arranged on a water inlet channel; the grid gaps of the coarse grids are 25-40mm, and the grid gaps of the fine grids are 10-25mm; when the grit chamber is a rotational flow grit chamber, the inflow flow rate is controlled to be 0.6-0.9m/s, and when the grit chamber is an aeration grit chamber, the inflow flow rate is controlled to be 0.1-0.3m/s; the residence time of the anaerobic zone is 1-2h, the residence time of the first-stage anoxic zone is 4-6h, the residence time of the first-stage aerobic zone is 8-12h, the residence time of the second-stage anoxic zone is 2-4h, the residence time of the MABR zone is 6-8h, and the residence time of the second-stage aerobic zone is 3-5h.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An MABR integrated sewage treatment system with multiple points of water inlet and outlet comprises a primary treatment process, a secondary treatment process and an advanced treatment process, and is characterized in that the primary treatment process comprises a coarse grating, a fine grating and a grit chamber, the secondary treatment process comprises an MABR reaction tank, the advanced treatment process comprises an ozone contact tank and a disinfection tank, the coarse grating is connected with the fine grating, the fine grating is connected with the grit chamber, the grit chamber is connected with the MABR reaction tank, the MABR reaction tank is connected with the ozone contact tank, and the ozone contact tank is connected with the disinfection tank;

MABR reaction tank includes inlet shaft, anaerobic zone, one-level anoxic zone, one-level aerobic zone, second grade anoxic zone, MABR district, second grade aerobic zone and outlet shaft, inlet shaft and anaerobic zone link to each other, anaerobic zone and one-level anoxic zone link to each other, one-level anoxic zone and one-level aerobic zone link to each other, one-level aerobic zone and second grade anoxic zone link to each other, second grade anoxic zone and MABR district link to each other, MABR district and second grade aerobic zone link to each other, second grade aerobic zone and outlet shaft link to each other.

2. The MABR integrated sewage treatment system with multiple water inlets and outlets according to claim 1, wherein said grit chamber is a cyclone grit chamber or an aeration grit chamber.

3. The MABR integrated sewage treatment system with multiple water inlets and outlets according to claim 1, wherein said disinfection tank is an ultraviolet disinfection tank or a liquid chlorine disinfection tank.