KR100489728B1 - Wastewater treatment system by multiple sequencing batch reactor and its operation methods - Google Patents

Abstract

The present invention is based on two or more SBR reactors, and in each reactor, whether or not to inject air and inlet water is alternately set according to the characteristics of the inflow water, and thus, a multi-batch continuous batch type which induces an efficient nitrogen and phosphorus removal reaction. It relates to a wastewater treatment apparatus and its operation method. In the present invention, by greatly improving the existing batch-type wastewater treatment system and operation method, by maximizing the utilization of organic matter to 100% by utilizing only organic matter in the influent to nitrogen and phosphorus removal, and greatly improve the efficiency of nitrogen and phosphorus removal, and also separation membrane, etc. A new sewage and wastewater treatment system and its operating method, which have the same effect as that installed in a plurality of reactors at the same time by installing only a single membrane by installing a solid-liquid separator including SBR reactor outside To provide.

Description

Wastewater treatment system by multiple sequencing batch reactor and its operation methods

The present invention relates to an advanced sewage and wastewater treatment apparatus for treating organic matter, nitrogen and phosphorus in sewage and wastewater using a continuous batch reactor (SBR) and its operation method, and in particular, based on two or more SBR reactors. The present invention relates to a multi-batch continuous batch sewage / wastewater treatment apparatus for inducing efficient nitrogen and phosphorus removal reactions by alternately setting the presence or absence of air injection and the inflow of inflow water in the reaction tank according to the characteristics of the inflow water.

There are two methods for advanced treatment of sewage: continuous flow, in which the sedimentation tank is largely classified, and continuous batch method (SBR), which allocates the sedimentation time in the reaction tank without installing the sedimentation tank separately.

Continuous flow method is to install each reactor separately, that is, anaerobic, anaerobic tank, aerobic tank and sedimentation tank to make anaerobic, anaerobic, aerobic and sedimentation conditions for wastewater treatment. There are many installation examples. However, the continuous flow method is designed to meet the flow rate and water quality of the influent to be treated, there is a disadvantage that the ability to cope when the flow rate increases or there is a water quality fluctuation. Typical processes of the continuous flow method include A / O, A2 / O, Bardenpho, and DNR.

Continuous batch method (SBR) consists of a single reactor that does not require a precipitation tank, and is treated in an inlet stage, reaction stage, precipitation stage and discharge stage by giving conditions of anaerobic, anoxic, aerobic and precipitation in a single reactor. Way. The SBR process is mainly used in small and medium sized treatment plants, and has the advantage of being able to cope with an increase in flow rate or a change in water quality. In general, it is known that temporary processing is possible up to 2.5 times the usual flow rate. According to the World Environmental Association (WEF), the SBR process can be easily applied in small cities with few sites, has excellent applicability according to the characteristics of waste water, and can remove nitrogen and phosphorus, so it is very suitable for small scales with high flow rate and water quality fluctuations. (Design of Municipal Wastewater Treatment Plant, WEF, 1998). In addition, the U.S. Environmental Protection Agency (U.S. EPA) has evaluated SBR technology as a particularly applicable process at small scale. Representative continuous batch (SBR) processes include KIDEA, IDEA, and swirling vortex SBR.

Recently, two to four reactors are divided into anaerobic, anoxic, and aerobic phases, such as A / O, A2 / O, and Bardenpho processes. Apart from the method, advanced process development is developing with the operation of the reaction tank which changes the inflow direction of the influent and the operation method of the reactor over time. In particular, a channel changing activated sludge or intermittent aeration type treatment method, which is effective for treating nitrogen, has been developed and used. A major focus of these methods is the effective use of organic matter in anoxic or anaerobic stages of denitrification and phosphorus release.

If the SBR technology developed at home and abroad is largely classified, it can be divided into continuous inflow and intermittent inflow according to inflow type. Firstly, the continuous inflow type aims at the continuous inflow of influent, so that even in the aeration state in which air is supplied, inflow is inevitably caused, but some loss of organic matter occurs. Technology focused on smoothness and ease of use. In other words, the continuous inflow type has advantages in terms of facility installation cost because it does not need to significantly reduce or install the flow control tank, but about 30 to 50% of organic matter loss is inevitably generated, resulting in lower processing efficiency. It also has disadvantages in terms of water quality and operation, which requires additional external carbon sources if necessary.

Secondly, the intermittent inflow type is a technology that focuses on improving the removal efficiency rather than the influent flow, and is mainly developed to induce pre-denitrification or phosphorus release. This technique also has a disadvantage in that the treatment efficiency is greatly reduced when the concentration of organic matter in the influent is low, and the organic matter loss is about 30%.

On the other hand, in recent years, a lot of technologies that combine a conventional membrane with a high technology has been developed. However, most of these separation membrane technologies have been developed by immersing the membrane in a reaction tank (aeration tank) to maintain a high concentration of activated sludge in the aeration tank during high concentration wastewater treatment. It should be washed, and in this case, since it shows strong toxicity to microorganisms, it has problems such as unstable treatment efficiency at the initial stage after washing. In addition, these methods have the disadvantage of maintaining the activated sludge at a higher concentration than necessary due to the toxicity of the washing solution even in low concentration sewage, and there is a problem that the installation cost of the membrane is enormous if the number of reactors is increased.

Sewage and wastewater treatment requires effective treatment of organic matter, nitrogen, and phosphorus. In particular, sewage and wastewater treatment facilities in areas adjacent to water supplies require complete treatment of nitrogen and phosphorus. At present, due to the simplicity and economical efficiency of the facility, a continuous batch process is used for small-scale sewage treatment, but there is a problem in that the organic matter in the influent cannot be effectively utilized. The present invention is to solve the problems of the conventional SBR method and to achieve the maximum removal efficiency in a given influent condition, to continuously inject the influent to facilitate the operation smoothly and easily while eliminating the loss of organic matter and greatly increase the treatment efficiency. It aims to improve.

The use of organics in biological advanced processing techniques is very important. The main method used in the advanced processing method is to form anaerobic, anaerobic and aerobic conditions by turning on or off the air supply. At this time, the part which needs organic substance is phosphorus release reaction in anaerobic condition and denitrification reaction in anoxic condition. In other words, when the inflow water is supplied under the condition that the air is not supplied, the removal efficiency is improved. However, when the inflow water is supplied under the air supply condition, the nitrogen and phosphorus removal efficiency is reduced. Therefore, the supply method of influent is very important for the development, and the utilization of such organic matter is very important for process efficiency, especially when treating sewage and wastewater with low C / N ratio in influent such as Korea. The removal efficiency of nitrogen and phosphorus is highly dependent on the utilization of organic matter.

Therefore, in the present invention, the influent is introduced only to the anaerobic and anoxic stages so that all organic matter in the influent can be used only for the removal of nitrogen and phosphorus during the treatment of sewage with a low C / N ratio, and the SBR reactor is a tank of 2 tanks so that the influent can be continuously supplied. Provides a continuous batch sewage and wastewater treatment system and its operating method. That is, in the present invention based on the two SBR reactors, the injection of inlet water is continuously performed in the inlet pump in the entire process by alternately setting the presence or absence of air injection into each reactor according to the characteristics of the influent. At the time of supply to each reactor, the inflow water is alternately supplied to the reactor only during the non-aeration time by the automatic flow changer, so that the organic matter in the influent can be removed to remove nitrogen and phosphorus by utilizing the organic matter in the influent only for the denitrification and phosphorus release reactions. A new two-bar SBR technology is provided, incorporating Euro change and intermittent aeration technologies.

In addition, the present invention is to solve the disadvantages of the existing membrane technology and the problem of installation costs, the present invention provides a new apparatus and method combining the solid-liquid separation device including the membrane with the SBR reactor. In particular, the present invention provides a technique for minimizing the membrane installation cost by installing and operating an efficient solid-liquid separator operating technology and the post-aeration separation membrane tank having the effect of installing the separation membrane at the same time in a plurality of reactors with only one membrane.

Unless otherwise specified, sewage and wastewater are used herein to include all sewage, sewage, livestock wastewater, and other wastewater.

In the present invention, the conventional continuous batch wastewater treatment system and operation method are greatly improved, and the organic matter in the influent is utilized only to remove nitrogen and phosphorus, thereby maximizing the utilization of organic matter to 100%. Batch sewage and wastewater treatment systems and methods of operation are provided.

Waste water treatment apparatus of the present invention,

Inlet for storing and supplying sewage and waste water; SBR reactor; A stirrer for stirring the waste water in the reactor; An air supply device for supplying air into the reactor; An inflow step in the reaction tank including an air supply control device for controlling the air to be supplied to the reaction tank and a discharge facility for discharging the purified water in the reaction tank; Anaerobic, anaerobic and aerobic reaction steps; Precipitation step; In a continuous batch sewage and wastewater treatment facility that treats sewage and wastewater in a discharge stage,

By arranging two or more SBR reactors in parallel, the supply of air to each reactor is alternately supplied, and the inflow of water from the inlet is continuously performed, but only when no air is supplied from each reactor by installing an automatic flow path changer. Characterized in that the flow path is alternately changed to each reactor at a predetermined time to supply the influent.

Preferably, the air supply control device is installed on a pipe connecting the air supply device and the diffuser and is automatically controlled by a timer, the influent automatic flow path change device is a channel or valve between the inlet and the reactor It is installed in the type and controlled in conjunction with the air supply control device by a timer.

In addition, as a discharge facility for discharging the treated water from the sewage and wastewater treatment apparatus of the present invention, a solid-liquid separator may be separately installed outside the SBR reactor. At this time, the external liquid-liquid separator is preferably provided with a washing liquid discharge valve that can also serve as a treatment water discharge valve in the lower portion.

In addition, the sewage and wastewater treatment apparatus of the present invention is provided with a separate aeration membrane post-aeration membrane tank equipped with a separation membrane or a known solid-liquid separation unit outside the rear end of the SBR reactor, the activated sludge discharged from the reactor in the post-aeration membrane separation tank It can be operated to discharge the treated water by the final treatment. At this time, the discharge facility for discharging the activated sludge from the reaction tank to the post-aeration membrane separation tank, preferably used as a facility for discharging the effluent of the reaction tank.

Basic operation method of the sewage and wastewater treatment apparatus according to the present invention includes the following four steps.

Inflow water is supplied to the first reactor without air, and anoxic and anaerobic reactions are performed. The second reactor is a first step of maintaining an aeration state in which air is supplied.

Inflow water is supplied to a second reactor without air, and anoxic and anaerobic reactions are performed, and the first reactor maintains an aeration state in which air is supplied.

Inflow water is supplied again to the first reactor without air, and anaerobic and anaerobic reactions proceed. At this time, the second reactor undergoes a re-aeration step for a certain period of time and then precipitates sludge in the state of stopping agitation and air supply. Precipitation step: The third step in which the discharge step of discharging the treated water and excess sludge proceeds sequentially:

Inflow water is supplied again to the second reactor without air, and anaerobic and anaerobic reactions proceed. At this time, the first reactor undergoes a re-aeration step for a certain period of time and then precipitates sludge in the state of stopping stirring and air supply. Fourth step in which the sedimentation step, the treated water and the discharge step of discharging excess sludge are sequentially performed:

Specific embodiments of the sewage and wastewater treatment apparatus of the present invention are shown in Figs. Hereinafter, with reference to the accompanying drawings will be described in detail the multiple tank type SBR sewage and wastewater treatment apparatus and its operation method.

FIG. 1 schematically illustrates a state in which two SBR reactors are operated as a pair, and the inflow water injection method and the air supply and stirring function in the reactor are alternately controlled automatically.

Waste water treatment apparatus of the present invention shown in Figure 1,

An inflow portion 1 of a flow rate adjustment tank and a pretreatment facility for storing inflow water such as sewage and wastewater;

Two SBR reactors (3) and (4) arranged continuously in the lateral direction of the inlet part (1),

An inlet pump (not shown) for transporting waste water from the inlet unit 1 to the reactor;

An inflow water automatic flow path changer (2) installed between the inflow pump and the reaction tank and changing the flow path of the inflow water into each reaction tank;

A stirring facility (7) for mixing sewage and wastewater and microorganisms in the reactor;

A broa (5) for injecting air into each reactor and an air supply control device (6) such as a solenoid valve and an electric valve for changing the supply of air at predetermined time intervals;

And a discharge facility 9 installed in the arranged reaction tank to discharge purified water.

The sewage and wastewater treatment apparatus of the present invention can be applied to both the case where there is a storage tank as the inlet 1 in which the sewage and wastewater are stored. The inflow water is continuously supplied from the inflow portion 1, but the inflow water is supplied only in a state in which the inflow water is alternately supplied at a predetermined time by the automatic flow path changer 2 at a predetermined time. Allow inflow. The influent automatic flow path change device 2 may be installed in a water channel type or a valve type, and is preferably controlled in conjunction with the air supply control device 6 by a timer. In addition, the air supply control device 6 is installed on the pipe connecting the brower 5 and the diffuser, and is automatically controlled by a timer.

Preferred operating method of the sewage and wastewater treatment apparatus shown in Figure 1 consists of the following four steps.

Inflow water is supplied to the first reactor for anaerobic and anaerobic reactions, and the second reactor is aerated.

Inflow water is supplied to the second reactor for anoxic and anaerobic reactions, where the first reactor is aerated.

Inflow water is supplied to the first reactor again, and anaerobic and anaerobic reactions are performed. At this time, the second reactor is sequentially subjected to the reaeration step, the precipitation step, and the discharge step.

Inflow water is supplied to the second reactor again, and anaerobic and anaerobic reactions are carried out, and during the same time, the fourth stage in which the reaeration step, the precipitation step, and the discharge step are sequentially performed in the first reactor:

Hereinafter, preferred embodiments will be described in detail for each step.

(1) first step

Sewage and wastewater flows in from the inlet, and the incoming and outgoing wastewater is alternately supplied according to the distribution of time set by each reactor by the automatic flow path changer. That is, preferably, the automatic flow path changing device changes the flow path so that the waste water and the waste water flow only into the reaction tank in which no air is supplied by interlocking with the air supply control device 6 by a timer. Therefore, in the first reactor without air supply, inflow water is supplied to perform anoxic and anaerobic reactions, that is, denitrification to remove residual nitrogen nitrate, phosphorus release and organic intake, and the second reactor maintains aeration. At the same time, aerobic reactions such as nitrification, phosphorus intake, and organic matter oxidation occur.

(2) second stage

At the end of the first stage, the air supply is changed from the second reactor to the first reactor, and the direction of inflow of the influent is changed from the first reactor to the second reactor by the automatic flow channel changer 2 so that air is not supplied. Only to the second reactor.

At this time, the first reactor maintains an aerobic state by supplying air in a state where the inflow of water is stopped and maximizes the nitrification reaction and the intake of phosphorus.

In this step, the reaction proceeds in the same manner as in the first step except that the first reactor and the second reactor change roles.

(3) the third stage

The air supply is again changed from the first reactor to the second reactor, and the inflow direction of the inflow water is changed from the second reactor to the first reactor by the automatic flow path changer 2 so that the inflow water is supplied only to the first reactor without air. do.

In the first reactor to which the influent is supplied again, anaerobic and anaerobic biological reactions proceed in the same manner as in the first stage. In this stage, the denitrification reaction to remove the nitrate nitrogen generated in the second stage is maximized and the excess organic matter is removed. Further induces the release of phosphorus.

At this time, the second reaction tank undergoes a reaeration step in which air is supplied for a predetermined time, and then, a precipitation step of precipitating activated sludge, which is microorganisms grown in the state of stopping agitation and air supply, and a discharge facility 9 installed in the reaction tank. The discharge step of discharging the treated water and excess sludge proceeds sequentially. In the reaeration stage, the aerobic state is maintained by supplying air without injecting water for a predetermined time, removing all remaining organic matter and maximizing the intake of phosphorus released in the previous stage. In the precipitation step, the agitation facility 7 and the air supply are stopped and the sludge is settled for a certain time. In the discharge step, the treated water is discharged and the excess sludge is discharged, and the purified water is discharged for 30 minutes and the excess sludge is discharged at the same time.

(4) the fourth step

The air supply is again switched from the second reactor to the first reactor and the influent is supplied only to the second reactor where no air is supplied. It proceeds in the same manner as in the third step except that the first reactor and the second reactor change roles.

In the operating method of the present invention, since the inflow water is supplied only to the reactor in the non-aeration condition in which no air is supplied, it is possible to maximize the use of organic matter.

The first step to the fourth step is composed of one cycle, and the sewage and wastewater are treated continuously and repeatedly. Preferably, the reaction time of each step is set and operated in the same manner. Therefore, the time of combining the first, second, and third stages (T1, T2, T3) with the fourth stage of reaeration (T4), precipitation (T5), and discharge stage (T6) based on the first reactor is same. That is, the reaction time is composed of T1 = T2 = T3 = (T4 + T5 + T6).

The reaction time of each stage is usually adjusted in the range of 60 to 120 minutes, and the cycle is operated three to six times a day.

In addition, when the flow rate of the floodwater or other influent increases significantly, preferably each step has a reaction time of 60 minutes, and the third step skips the reaeration step in the second reactor and the precipitation and discharge steps are performed. The fourth step allows the precipitation and discharge steps to proceed without the reaeration step in the first reactor.

The following Table 1 shows that the reaction proceeds step by step in each reactor in normal, Table 2 shows the process and step-by-step characteristics of the reaction proceeding in each step in the usual operation method. In the operation method of Table 1 and 2, the time required per cycle is 6 hours, and 4 cycles per day are repeatedly performed.

Table 3 below shows the method to be applied when the influent concentration is low but the flow rate is high during the flooding season or other periods when the influent flow rate increases.

In addition, the sewage and wastewater treatment apparatus of the present invention may be installed separately from the existing discharge facility and the other solid-liquid separation device, including the separation membrane outside the reactor. 2a shows that the solid-liquid separator 11 is installed outside the reactor as a discharge facility for discharging treated water in the apparatus shown in FIG. Figure 2b is a view showing in detail the structure and connecting piping of the SBR reactor and the external solid-liquid separator 11 in Figure 2a.

The solid-liquid separator of the present invention is preferably provided with an additional function so that the lower washing liquid discharge valve 14 can also be used as a treated water discharge valve if necessary. That is, in normal operation, it is used as a solid-liquid separator, but if there is no need for a solid-liquid separator or in case of breakdown, the washing liquid discharge valve 14 can serve as a discharge facility used in the operation of a general SBR reactor. It is also used as a treated water discharge valve to smoothly discharge the treated water of the SBR reactor. In addition, the connection pipe connecting the reaction tank (3) (4) and the solid-liquid separator (11) is installed so that the scum or foreign matter on the top of the SBR reaction tank is preferably discharged, it is preferable that the scum or foreign matter is discharged by the cyphon In order to prevent the connection to the separate pipe (15) to prevent the siphon. Externally mounted solid-liquid separation device according to the present invention has the advantage that the washing and maintenance can be made efficiently.

In addition, the sewage and wastewater treatment apparatus of the present invention may be provided separately from the rear aeration separation membrane tank 17 in which the separation membrane 18 or other known solid-liquid separator is installed outside the rear end of the reaction tank. When the aeration membrane immersion membrane is installed after immersing the separation membrane in this way it can have the same effect as installing the separation membrane in each of the multiple reactors with a single membrane device. Figure 3 is a schematic diagram showing a state in which the post-aeration membrane separation membrane 17 of aerobic conditions is installed outside the rear end of the reactor in the waste water treatment apparatus of FIG.

That is, in the sewage and wastewater treatment apparatus of the present invention, the solid-liquid separator or other well-known solid-liquid separator installed with the separator 18 is made and installed outside by creating a separate aerobic tank (hereinafter referred to as "post-aerator membrane tank"). At this time, the separator. Conventionally known separators such as microfiltration membranes (MF) or ultrafiltration membranes (UF) can be used. Preferably, the after-aeration separation membrane tank 17 is provided with a valve for discharging facilities 12 and 13 from the reaction tank to the after-aeration separation membrane tank so that the treated water or mixed liquor discharged from the SBR reaction tank can be introduced at a predetermined time. Install it to control over time. The discharge facility (12) (13), preferably has a structure that can be used to change the use as a effluent discharge facility when the solid-liquid separator is broken, in the washing step, the physical and chemical cleaning after blocking the inflow Discharge the wash water in a separate line so that wash water containing chemicals that are toxic to the microorganisms does not enter the reactor.

The operation of the post-aeration membrane tank is different from the conventional operation method in which the membrane is immersed in each SBR reactor, and the membrane is installed by installing only the membrane in the post-aerator membrane tank and transferring the activated sludge of each SBR reactor to the post-aerator membrane tank 17 to treat the separation membrane. The installation cost can be greatly reduced. In addition, such a membrane installation and operation method can be easily applied by modifying the structure of the sedimentation tank in the existing BNR (biological Nutrients removal) process operating with the sedimentation tank.

The following Table 4 shows the operating method in the case of installing the post-aeration separator tank.

When the post-aeration membrane separation tank is installed, the precipitation and discharge steps of the aeration reaction tank are omitted in the third and fourth stages, and the activated sludge is discharged from the aeration reaction tanks of the first to fourth stages to the post-aeration membrane separation tank. The aeration membrane tank discharges treated water by final treatment of activated sludge. At this time, the after-aeration membrane tank is maintained in an aeration state for supplying air continuously for 24 hours to prevent clogging of the membrane, and the sludge deposited in the after-aeration membrane tank is returned to the SBR reactor using the pump 16.

The main feature of the waste water treatment system operation method according to the present invention can be applied to the SBR process operated by one reactor. In other words, when operating one reactor, a storage tank is installed in front of the reactor to continuously supply inflow water. The supply of inflow water from the storage tank is omitted only when the reactor is anaerobic and anaerobic. Thus, the main features of the operating method of the present invention can be implemented.

Example 1

As a preferred embodiment of the present invention, the treatment of sewage and wastewater was performed by the apparatus of FIG.

The chemical oxygen demand was 103 mg / L, the total nitrogen (TN) was 23.6 mg / L, and the total phosphorus (TP) was 2 mg / L. 90 minutes of the first stage feed and first stage of anaerobic, anaerobic reaction; 90 minutes of a second stage in which an aerobic reaction occurs in an aeration state; 90 minutes of the third stage of the second influent feed and anaerobic, anaerobic reaction; And a fourth step, which takes a total of 90 minutes to 20 minutes of reaeration, 40 minutes of precipitation, 30 minutes of discharge.

As a result, the chemical oxygen demand of the treated water was 6.2 mg / L, and the concentrations of total nitrogen (T-N) and total phosphorus (T-P) were 6.4 mg / L and 0.68 mg / L, respectively.

The multi-tank continuous batch sewage and wastewater treatment apparatus and operating method of the present invention is a technique of operating by the on-off alternate injection method and the on / off of the air supply device to change the injection direction of the influent water supplied to the reaction tank. As a new treatment method applying the advantages and advantages of the continuous batch reactor, according to the present invention, the treatment efficiency of organic matter, nitrogen and phosphorus is greatly improved, and since it does not require a separate settling basin or a subsequent filtration device, the operation is simple and inexpensive. In addition, it is an efficient and economical sewage and wastewater treatment method that can greatly reduce the installation cost of the membrane by using a method for installing a solid-liquid separator including a separator externally.

 Figure 1 schematically shows the overall structure of the multiple tank sewage and wastewater treatment apparatus of the present invention that operates by supplying influent water alternately using two SBR reactors.

Figure 2a is a schematic view showing a state in which the solid-liquid separator is installed separately outside the reaction tank of the multi-tank SBR sewage, wastewater treatment apparatus of the present invention,

Figure 2b is a schematic diagram of the structure and connecting piping of the SBR reactor and the solid-liquid separator shown in 2a.

Figure 3 is a schematic diagram showing a state in which the post-aeration separation membrane tank of aerobic conditions is installed outside the reaction tank rear end in the apparatus of FIG.

<Explanation of symbols for main parts of drawing>

1: pretreatment and inflow equipment 2: automatic flow path changing device

3: first SBR reactor 4: second SBR reactor

5: Blower 6: Air Supply Control

7: stirring equipment 8: diffuser

9: discharge facility 10: solid-liquid separator treatment water discharge facility

11: solid-liquid separator 12: 1st SBR reactor discharge equipment

13: 2 SBR reactor discharge facility 14: cleaning liquid and treated water discharge valve

15: cyphon prevention device 16: sludge conveying pump

17: after-aeration membrane tank 18: membrane equipment

Claims (10)

Inlet for storing and supplying sewage and waste water; Two or more SBR reactors arranged in parallel; A stirrer for stirring the waste water in the reactor; An air supply device for supplying air into the reactor; In the continuous batch sewage and wastewater treatment apparatus comprising an air supply control device for controlling the air supply to the reaction tank at a predetermined time and a discharge facility for discharging the purified water in the reaction tank,  The air supply control device is installed on the pipe connecting the air supply device and the diffuser and is automatically controlled by a timer to supply air to each SBR reactor in turn, Between the inlet and the SBR reaction tank, a channel-type or valve-type automatic flow path changing device which is interlocked with the air supply control device by a timer is installed to alternately supply inflow water continuously flowing from the inlet to each SBR reactor. Continuous batch type sewage and wastewater treatment apparatus of a plurality of tanks characterized in that. delete The method of claim 1, The discharge facility is a sewage and wastewater treatment device, characterized in that by operating a separate solid-liquid separation device outside the SBR reactor. The method of claim 3, The solid-liquid separator is a sewage and wastewater treatment device, characterized in that the washing liquid discharge valve which can be used as a treatment water discharge valve is provided at the bottom. The method of claim 1, A rear aeration separation membrane tank having a separation membrane or a solid-liquid separation device is installed outside the rear end of the SBR reactor, and the post aeration membrane separation tank maintains an aerobic state and finally processes activated sludge discharged from the reaction tank to discharge treated water. Sewage and wastewater treatment equipment. The method of claim 5, Discharge equipment for discharging activated sludge from the reactor to the post-aeration membrane separation tank is a sewage and wastewater treatment apparatus, characterized in that it can be used to change the use as a facility for discharging the effluent of the reactor. Inlet for storing and supplying sewage and waste water; Two or more SBR reactors arranged in parallel; An automatic flow path changing device for changing the flow path such that the inflow water continuously flowing from the inflow part is alternately supplied to each SBR reactor; A stirrer for stirring the waste water in the reactor; An air supply device for supplying air into the reactor; As a method of operating a multiple tank continuous batch sewage and wastewater treatment apparatus comprising an air supply control device for controlling the air to be supplied to the reaction tank alternately at a predetermined time and a discharge facility for discharging the purified water in the reaction tank, Inflow water is supplied to the first reaction tank that is not supplied with air, and anaerobic and anaerobic reactions are performed. The second reaction tank includes a first step of maintaining an aeration state in which air is supplied; Inflow water is supplied to the second reaction tank that is not supplied with air, and anaerobic and anaerobic reactions are performed. Inflow water is supplied again to the first reactor without air, and anaerobic and anaerobic reactions proceed. At this time, the second reactor undergoes a re-aeration step for a certain period of time and then precipitates sludge in the state of stopping agitation and air supply. A third step of sequentially proceeding the precipitation step, and the discharge step of discharging the treated water and the excess sludge; Inflow water is supplied again to the second reactor without air, and anaerobic and anaerobic reactions proceed. At this time, the first reactor undergoes a re-aeration step for a certain period of time and then precipitates sludge in the state of stopping stirring and air supply. A fourth step of sequentially proceeding the precipitation step, and the discharge step of discharging the treated water and the excess sludge; Operation method of the plural tanks continuous batch sewage, wastewater treatment apparatus comprising a. The method of claim 7, wherein The reaction time of each step is set to 60 to 120 minutes, each step is set to the same time, the operation method characterized in that for operating one cycle from the first step to the fourth step three to six times a day. 9. The method according to claim 7 or 8, wherein the flow rate of the floodwater or other inflow water is greatly increased. The reaction time of each step is 60 minutes, In the third step, the reaeration step of the second reactor is omitted, and the precipitation and discharge steps are performed. The fourth step is characterized in that the precipitation and discharge step proceeds by omitting the reaeration step of the first reactor. As a method of operating the sewage and wastewater treatment apparatus of claim 5, Inflow water is supplied to the first reaction tank which is not supplied with air, and anoxic and anaerobic reactions are performed. The second reaction tank maintains an aeration state in which air is supplied and discharges activated sludge to the post-aeration membrane separation tank; Inflow water is supplied to the second reaction tank that is not supplied with air, and anaerobic and anaerobic reactions are performed. The first reaction tank maintains an aeration state in which air is supplied and discharges activated sludge into the post-aeration membrane separation tank; Inflow water is supplied to the first reaction tank is not supplied to the first reaction tank is an oxygen-free, anaerobic reaction proceeds in this case, the second reaction tank to maintain the aeration state and discharge the activated sludge to the post-aeration membrane separation tank; Inflow water is supplied to the second reaction tank is not supplied to the second reactor is anoxic, anaerobic reaction proceeds at this time, the first reaction tank to maintain the aeration state and discharge the activated sludge to the post-aeration membrane separation tank; Including the, the activated sludge discharged to the after-aeration separation membrane tank in each step of the plural tanks type continuous batch sewage and wastewater treatment device, characterized in that the final treatment in the after-aeration separation membrane tank to be maintained in aerobic state to discharge the treated water. How it works.