CN213202515U

CN213202515U - IFAS-MBR sewage advanced treatment unit

Info

Publication number: CN213202515U
Application number: CN202021893035.XU
Authority: CN
Inventors: 张艳萍; 王怀林; 武克亮; 关晓琳
Original assignee: Jiangsu Kaimi Membrane Technology Co ltd
Current assignee: Jiangsu Kaimi Membrane Technology Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-14
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses an IFAS-MBR sewage advanced treatment unit, including the anaerobism pond, oxygen deficiency pond, good oxygen pond, MBR membrane cisterna and the backward flow canal that connect gradually, the backward flow canal goes out water and gets into good oxygen pond through the backwash pump, all is provided with fixed biofilm carrier device in anaerobism pond, oxygen deficiency pond and the good oxygen pond, is provided with aeration system in oxygen deficiency pond and the good oxygen pond, is equipped with the membrane module in the MBR membrane cisterna. Book (I)The water quality of the discharged water of the device is superior to the first class A standard of pollutant discharge Standard of urban Sewage plant (GB18918), COD and NH₃The main indexes of-N, TP and the like can stably reach the standard of more than V class in the environmental quality Standard of surface Water (GB3838-2002), and the method is suitable for the advanced treatment of low C/N sewage.

Description

IFAS-MBR sewage advanced treatment unit

Technical Field

The utility model relates to a sewage treatment technology, concretely relates to IFAS-MBR sewage advanced treatment unit.

Background

An Activated Sludge-biofilm Activated Sludge (IFAS) technology is characterized in that a biological filler is directly added into a reaction tank of an Activated Sludge process, biomass in the reaction tank consists of flocculent Sludge and a biofilm attached to a suspended filler, and the advantages of the two processes of the Activated Sludge and the biofilm can be simultaneously exerted, so that pollutants in sewage can be more effectively removed. The retention time (SRT) of solid suspended matters in the traditional activated sludge method is short, so that the proliferation of nitrifying bacteria with long generation time is limited; in the IFAS system, microorganisms can adhere to and grow on the solid filler, and longer SRT can be obtained, so nitrifying bacteria with longer generation time can adhere to and grow on the carrier, play the role of nitrification and realize the enhanced denitrification of the IFAS process.

At present, IFAS and A are more applied in sewage treatment process with lower carbon-nitrogen ratio (C/N)²The O combination technology, the prior art only arranges fixed fillers in the aerobic tank, the biochemical treatment effect is unstable, and the installation and the replacement of the solid fillers are very inconvenient.

SUMMERY OF THE UTILITY MODEL

For the biochemical treatment effect that solves current IFAS technique existence unstable, the extremely inconvenient technical problem of solid filler's installation and change, the utility model provides an IFAS-MBR sewage advanced treatment unit.

The utility model adopts the technical proposal that:

an IFAS-MBR sewage advanced treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank and a backflow channel, wherein sewage flows through the anaerobic tank, the anoxic tank and the aerobic tank in sequence, effluent of the aerobic tank enters the MBR membrane tank, effluent of the MBR membrane tank enters the backflow channel, effluent of the backflow channel enters the aerobic tank through a backflow pump, and the backflow channel is used for backflow of activated sludge and adjustment of a backflow ratio; the anaerobic tank, the anoxic tank and the aerobic tank are internally provided with fixed biological filler devices, the anoxic tank and the aerobic tank are internally provided with aeration systems, membrane modules are arranged in the MBR membrane tank, the fixed biological filler devices are used for the attachment growth of microorganisms, and the membrane modules are used for separating the effluent of the aerobic tank.

Furthermore, the fixed biological filler device is formed by combining a plurality of filler modules, each filler module comprises a filler frame and biological fillers, the biological fillers are arranged in the filler frames, guide rails are arranged in the tank body, and the filler frames are connected with the guide rails in a sliding fit manner.

Further, the aeration system of the anoxic tank is a microporous aerator, the aeration system of the aerobic tank is a perforated aerator, the bottom of the MBR membrane tank is provided with a bottom mud deposition prevention device, and the microporous aerator, the perforated aerator and the bottom mud deposition prevention device are all connected with the aeration fan.

Further, the sediment deposition prevention device is of a reversed-square-shaped perforated aeration pipe structure, the bottom of the MBR membrane tank is of a conical structure, and the reversed-square-shaped perforated aeration pipe is arranged in the conical structure.

Furthermore, inlets of the microporous aerator, the perforated aerator and the bottom sediment deposition prevention device are respectively connected with the aeration fan after being collected through respective branch pipes, each branch pipe is provided with a regulating valve, and the regulating valves are respectively used for regulating air quantities entering the microporous aerator, the perforated aerator and the bottom sediment deposition prevention device.

Furthermore, the anaerobic tank and the anoxic tank are both provided with submersible stirrers, and the submersible stirrers are arranged on the side wall of the tank body.

Further, anaerobism pond, oxygen deficiency pond, good oxygen pond, MBR membrane cisterna and the integrative design of backward flow canal, including the cell body, separate for anaerobism district, anoxic zone, aerobic zone, membrane area and backward flow district through the baffle in the cell body, anaerobism district, anoxic zone, good oxygen pond are at the baffle top intercommunication, and membrane area front end sets up the inlet channel, and good oxygen pond passes through inlet channel and membrane area intercommunication, and membrane area and backward flow district communicate at the baffle top.

The utility model has the advantages that: the utility model discloses all set up fixed biofilm carrier device in each biochemical section-anaerobism section, anoxic section, good oxygen section, entire system's microorganism is attached to fixed biofilm carrier and is grown, keeps higher biomass, and biochemical effect tradition A²O is better, and the effluent quality is superior to the first-class A standard of pollutant discharge Standard of municipal wastewater treatment plant (GB18918) and COD and NH after being separated by an MBR membrane module₃The main indexes of-N, TP and the like can stably reach the standard of more than V class in the environmental quality Standard of surface Water (GB3838-2002), and the method is suitable for the advanced treatment of low C/N sewage. The fixed biological filler device adopts a modular design, is extremely convenient to install and maintain, improves the operating efficiency of the system and reduces the operating cost of the system.

Drawings

FIG. 1 is a schematic structural diagram of the IFAS-MBR sewage advanced treatment unit of the utility model.

Fig. 2 is a schematic structural view of the modular bio-packing device of the present invention.

Fig. 3 is a schematic structural view of the square-clip-shaped perforated pipe of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.

Referring to fig. 1 to 3, the present embodiment provides an IFAS-MBR advanced sewage treatment apparatus, including an anaerobic tank 1, an anoxic tank 2, an aerobic tank 3, an MBR membrane tank 4, a backflow channel 5 and an aeration fan 6, wherein the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the MBR membrane tank 4 are sequentially connected, an outlet of the MBR membrane tank 4 is communicated with an inlet of the backflow channel 5, bottoms of the anoxic tank 2 and the aerobic tank 3 are respectively provided with an aeration system, a bottom sediment deposition prevention device is arranged at the bottom of the MBR membrane tank 4, the aeration system and the bottom sediment deposition prevention device are both connected with the aeration fan 6, fixed

biological filler devices

12, 22 and 32 are respectively arranged in the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3, a membrane assembly 41 is arranged in the MBR membrane tank 4, a backflow pump 51 is arranged in the backflow channel 5, and the backflow channel 5 is communicated with an inlet of the.

In this embodiment, the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3, the MBR membrane tank 4 and the return channel 5 are integrally designed, and include a tank body 10, the tank body 10 is divided into an anaerobic zone, an anoxic zone, an aerobic zone, a membrane zone and a return zone by

partitions

101, 102, 103, and 104, the anaerobic zone, the anoxic zone, the aerobic zone, the membrane zone, and the return zone are communicated at the tops of the partitions, and the top elevations of the

partitions

101, 102, 103, and 104 are sequentially reduced to form a liquid level difference. The baffle 401 is arranged at the front end of the membrane area, the baffle 401 separates the membrane area into the water inlet channel 402 and the membrane pool 4, the water inlet channel 402 is communicated with the membrane pool 4 through the opening at the lower end of the baffle 402, the water outlet of the aerobic pool 3 enters the water inlet channel 402 through the top of the partition plate 103 and then enters the MBR membrane pool 4, and the water inlet channel 402 is arranged to balance water quantity and water quality.

In this embodiment, the

fixed bio-packing devices

12, 22, 32 are identical in structure and all adopt a modular design, and each modular packing is installed by a rail. Taking the fixed biological filler device 12 of the anaerobic tank 1 as an example, the filler module comprises a filler frame 121 and a biological filler 122, the filler frame 121 is a steel framework, and the flexible biological filler 122 is wound and fixed in the steel framework. Two guide rails are prefabricated on two sides of the bottom wall of the anaerobic tank 1, and two cross beams at the bottom of the filler frame 121 are matched with the guide rails. When filling is filled, the filling frame 121 is sequentially pushed in through the guide rail, and the two groups of modules are fixed through the buckles after the filling is in place. By adopting a modular design and installation mode, the field installation time can be greatly saved, and the construction period is shortened; when the filler is replaced, the filler module to be replaced can be taken out by disassembling the buckle in a sliding manner, and the maintenance is convenient.

The structure and technical effects of the respective components will be described in detail below.

The anaerobic tank 1 is provided with a water inlet hole at the upper part and feeds water through a pipeline. A fixed suspended biological filler 12 is arranged in the anaerobic tank 1, and microorganisms can be attached to the filler to realize enhanced denitrification of the IFAS process; meanwhile, a first submersible stirrer 11 is arranged on the lower side of the side wall of the anaerobic tank 1, activated sludge can be better contacted with organic matters under the strong stirring action of the submersible stirrer, and simultaneously, the bottom of the anaerobic tank can be prevented from being greatly dead sludge, so that the removal efficiency of an anaerobic section is influenced; preferably, the hydraulic retention time of the anaerobic tank 1 is 1-2 h;

the fixed suspended biological filler 22 is arranged in the anoxic tank 2 to promote the growth of the attached biological membrane, so that more effective biomass is generated in the limited volume, and the hydrolysis acidification effect is improved; the bottom of the anoxic pond 2 is provided with a micropore aeration device 23, the lower side of the side wall is provided with a second submersible stirrer 21, and the combination of the micropore aeration device 23 and the submersible stirrer can effectively control the DO concentration of the anoxic pond 2, prevent sediment deposition and maximize the contact area of microorganisms; preferably, the hydraulic retention time of the anoxic pond 2 is 2-6 h.

The fixed suspended biological filler 32 is arranged in the aerobic tank 3, the arrangement of the filler improves the oxygen absorption capacity and maintains the biomass with higher concentration in the aerobic tank 3; the bottom of the aerobic tank 3 is provided with a perforated aerator 31, a fixed biological filler 32 is arranged in a matching way, and the biological filler 32 has cutting and blocking effects on bubbles, so that the retention time of the bubbles is longer, the gas-liquid contact surface area is increased, and the oxygen absorption capacity is improved. The filler arranged in the aerobic tank 3 can also enhance the scouring of the surface of the biological membrane, so that the biological membrane is updated more quickly and higher biological activity is maintained; preferably, the hydraulic retention time of the aerobic tank 3 is 2-6 h.

The bottom of MBR membrane cisterna 4 sets up to toper structure 43, and the sediment siltation device adopts back font perforation aeration pipe structure, and back font perforation aeration pipe structure 42 sets up in toper structure 43, and the setting of toper structure 43 makes mud disperse to the toper bottom because of the action of gravity, and perforation aeration pipe 42's structure makes silt unable piling up in the bottom and disperse to the sewage once more. The MBR membrane tank 4 is provided with at least one group of immersed membrane modules 41, and in the embodiment, two groups of immersed membrane modules are provided. The submerged membrane assembly 41 is used for separating the effluent of the aerobic tank. The square-clip-shaped perforated aeration pipe structure 42 is composed of perforated pipes 422, connecting pipes 421 and pipe joints, wherein the perforated pipes 422 are arranged in a square clip shape and are communicated through the connecting pipes 421, no hole is formed in the connecting pipes 421, and one end of each connecting pipe is not closed and is used for introducing air.

A through-wall reflux pump 51 is arranged in the reflux channel 5, and a flap valve is arranged at the tail end of the pipeline of the reflux pump 51, so that the external occupied space is saved. The wall-through reflux pump 51 is selected according to the reflux ratio of 5:1, and the hydraulic retention time of the reflux channel is preferably 0.5 h.

The bottoms of the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3, the MBR membrane tank 4 and the return channel 5 are provided with sludge discharge ports, and during specific operation, sludge at the bottom of the return channel is periodically discharged to a sludge treatment device or a sludge concentration tank for centralized treatment according to requirements.

The aeration fan 6 is arranged outside the tank body 10 and is connected with the anoxic tank microporous aerator 23, the aerobic tank perforated aerator 31 and the membrane tank perforated aeration pipe 42 through pipelines, a first regulating valve 24 is arranged on the anoxic tank connecting pipeline, a second regulating valve 33 is arranged on the aerobic tank connecting pipeline, a third regulating valve 44 is arranged on the membrane tank connecting pipeline, the air inflow of the anoxic tank is controlled through the first regulating valve 24, the air inflow of the aerobic tank is controlled through the second regulating valve 33, and therefore the aerobic tank is maintained to have high dissolved oxygen; the start and stop of the sediment deposition prevention device at the bottom of the membrane tank are controlled by a third regulating valve 44. The operation is simple, and the control is convenient.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also within the protection scope of the present invention.

Claims

1. An IFAS-MBR sewage advanced treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank and a backflow channel, and is characterized in that sewage flows through the anaerobic tank, the anoxic tank and the aerobic tank in sequence, effluent of the aerobic tank enters the MBR membrane tank, effluent of the MBR membrane tank enters the backflow channel, effluent of the backflow channel enters the aerobic tank through a backflow pump, and the backflow channel is used for backflow of activated sludge and adjustment of backflow ratio; the anaerobic tank, the anoxic tank and the aerobic tank are internally provided with fixed biological filler devices, the anoxic tank and the aerobic tank are internally provided with aeration systems, membrane modules are arranged in the MBR membrane tank, the fixed biological filler devices are used for the attachment growth of microorganisms, and the membrane modules are used for separating the effluent of the aerobic tank.

2. The IFAS-MBR sewage advanced treatment unit as claimed in claim 1, wherein the fixed biological filler unit is formed by combining a plurality of filler modules, the filler modules comprise a filler frame and biological fillers, the biological fillers are arranged in the filler frame, guide rails are arranged in the tank body, and the filler frame is connected with the guide rails in a sliding fit manner.

3. The IFAS-MBR sewage advanced treatment unit as claimed in claim 1 or 2, further comprising an aeration fan, wherein the aeration system of the anoxic tank is a microporous aerator, the aeration system of the aerobic tank is a perforated aerator, the bottom of the MBR membrane tank is provided with a sediment deposition prevention device, and the microporous aerator, the perforated aerator and the sediment deposition prevention device are all connected with the aeration fan.

4. The IFAS-MBR sewage advanced treatment unit as claimed in claim 3, wherein the sediment accumulation preventing device is a reversed-square perforated aeration pipe structure, the bottom of the MBR membrane tank is arranged to be a conical structure, and the reversed-square perforated aeration pipe is arranged in the conical structure.

5. The IFAS-MBR wastewater advanced treatment unit of claim 3, wherein the inlets of the micro-pore aerator, the perforated aerator and the sediment deposition prevention unit are respectively connected to the aeration fan after being collected by respective branch pipes, and each branch pipe is provided with a regulating valve for regulating the amount of air entering the micro-pore aerator, the perforated aerator and the sediment deposition prevention unit.

6. The IFAS-MBR sewage advanced treatment unit as claimed in claim 1 or 2, wherein a submersible stirrer is arranged in each of the anaerobic tank and the anoxic tank, and the submersible stirrer is arranged on the side wall of the tank body.

7. The IFAS-MBR sewage advanced treatment unit as claimed in claim 1 or 2, wherein the anaerobic tank, the anoxic tank, the aerobic tank, the MBR membrane tank and the backflow channel are integrally designed, and the IFAS-MBR sewage advanced treatment unit comprises a tank body, the tank body is divided into an anaerobic zone, an anoxic zone, an aerobic zone, a membrane zone and a backflow zone by partition plates, the anaerobic zone, the anoxic zone and the aerobic tank are communicated at the tops of the partition plates, the front end of the membrane zone is provided with the inflow channel, the aerobic tank is communicated with the membrane zone by the inflow channel, and the membrane zone is communicated with the backflow zone at the tops of the partition plates.