KR100307260B1 - System of processing sewage - Google Patents

Abstract

PURPOSE: A treatment system of sewage and wastewater is provided, which can treat sewage and wastewater using a single reaction tank by only actuating pump and blower through control part. Plural reaction tanks set in parallel can be operated alternately, thus eliminating any downtime of the facilities and reducing malfunction. CONSTITUTION: The system comprises a screen tank(200), a reaction tank(210) and a control part(270). The reaction tank(210) is composed of No.1 compartment(214) and No.2 compartment(218). Water screened at the screen tank(200) enter the No.1 compartment(214), in which water level is sensed by a level sensor(226), through a motorized valve(222) controlled by the control part(270), flow to No.2 compartment through the under passage, and discharged through the discharge hole(216) set at the top. To the No.1 and No.2 compartment, compressed air is fed through air spargers(240).

Description

Sewage / Wastewater Treatment System {SYSTEM OF PROCESSING SEWAGE}

The present invention relates to a sewage / wastewater treatment system, and in particular, a plurality of compartments are formed by dividing a reaction tank in which a treatment water outlet is fixed at an upper portion thereof so that aeration and precipitation are simultaneously performed in the single reactor according to the operation of a blower. The sewage / wastewater treatment system allows the treated water to be discharged to the treated water outlet by the air pressure of the compartment opposite to the water outlet, and installs a plurality of reaction tanks in parallel so that the installation cost and space are reduced and the treatment efficiency is improved. It's about the system.

The conventional sewage / wastewater treatment system purifies and discharges sewage and wastewater through predetermined sewage and wastewater treatment devices, and dewatered sludge generated through a predetermined dehydration method, and then landfilled or incinerated and treated. An example will be briefly described with reference to FIGS. 1, 2, and 3.

First, Figure 1 is a block diagram showing a conventional wastewater treatment apparatus and process, wastewater introduced into the screen tank 10 through the wastewater inlet 12 is a relatively bulky contaminants and suspended solids by the screen (14) After this is removed, an appropriate amount flows into the initial settling basin 30 by the flow control tank 20 and stays for a predetermined time. At the bottom of the initial settling basin 3, the suspended solids contained in the wastewater are retained. Sludge precipitated by gravity and the liquid layer is formed at the top to precipitate the bottom is supplied to the concentration tank 60 and the liquid layer of the upper layer is introduced into the aeration tank 40, the aeration tank 40, the final sedimentation basin ( The sludge conveyed from 30) and the liquid layer are mixed at the same time as the aeration. Then, the wastewater in the aeration tank 40 subjected to the aeration and mixing as described above is introduced into the final sedimentation basin 50, in the final sedimentation basin 50, sludge according to the concentration of the wastewater introduced into the bottom and the liquid portion at the top This is formed, some of the bottom sludge is returned to the aeration tank 40, the remaining sludge flows into the concentration tank 60 and concentrated in the concentration tank 60 together with the sludge generated from the initial settling basin 30, and then dehydrator ( 70) is dewatered and discharged to the sludge cake, the upper liquid layer of the final sedimentation basin 50 is discharged to the outside.

In the conventional sewage treatment apparatus, a digestion gas storage tank for treating the digestion gas generated from the digestion tank 80 and the digestion tank 80 as shown in FIG. 2 at the rear end of the concentration tank 60 of the wastewater treatment apparatus shown in FIG. In addition to the 90, the sludge generated from the digester 80 is discharged to the cake through the dehydrator 70, the digestion gas of the digestion gas storage tank 90 is burned in the boiler (95) digestion tank (80) ) Will warm (加溫).

However, according to the conventional sewage / wastewater treatment apparatus and method as described above, a number of different treatment processes are required, and thus a high level of maintenance technology is required. There is a problem that if the abnormality occurs in any part of the process, the treated water that is not completely purified flows out. In addition, a separate denitrification and dephosphorization process was required.

On the other hand, Figure 3 is a view showing another conventional sewage treatment system, a sewage inlet 112 is formed on one side and a reactor (110) provided with a decant (114) for discharging the treated water on the other side When the operation of the reaction tank 110 is configured, the sewage is continuously introduced into the reaction tank 110 and the aeration proceeds until the inside of the reaction tank 110 reaches a predetermined predetermined level. The supply of oxygen is stopped for a predetermined period of time. At this time, suspended solids in the reactor 110 are precipitated at the bottom of the reactor 110 by gravity and a liquid layer is formed at the top. As described above, when the precipitation of the solid is finished, the decant 114 is operated to discharge the treated water of the upper liquid layer in the reaction tank 110 to the outside, and the aeration process, the precipitation process, and the discharged water process are sequentially performed. Repeatedly.

However, according to the sewage treatment as described above, since a single reaction tank is used, when an abnormality occurs in the reaction tank 110, there is a problem in that the sewage cannot be treated, and the decant 114 to flow out the treated water to the outside. Since it must be installed, the installation cost is increased and there was a problem that a separate system for operating the Decant 114 is required.

An object of the present invention for solving the conventional problems as described above is to divide the reaction tank in which the treatment water outlet is formed on one side into a sealed compartment connected to the wastewater inlet and the treatment water outlet side compartment connected thereto, and each valve has a valve in the middle. The pipe connected to the blower is installed in a predetermined shape to allow aeration and precipitation in a single reactor according to the open / closed state of the blower and valve, and the treated water is discharged through the treated water outlet through the pressure of the sealed compartment after settling. It is to provide a sewage / wastewater treatment system to be discharged to, and by installing a plurality of the reaction vessel in parallel to each alternate operation, to improve the treatment efficiency and to reduce the installation cost and location.

1 is a view showing a conventional sewage treatment system

2 is a view showing a conventional wastewater treatment system

3 is a view showing another conventional sewage treatment system

4 shows a sewage / wastewater treatment system according to the present invention.

5 is a plan view showing an example in which a plurality of reaction tanks in parallel are installed according to the present invention.

6 is a flow chart showing the operation of the sewage / wastewater treatment system according to the present invention

Explanation of symbols on the main parts of the drawings

200: screen tank 210: reactor

214, 218: compartment 226: water level sensor

222, 242, 252, 262: valve 230: blower

224, 240, 250, 260: tube 270: control unit

Embodiments of the present invention for achieving the above object will be described in detail below with reference to the drawings.

4 is a view showing the sewage / wastewater treatment system according to the present invention, Figure 5 is a plan view showing an example of parallel installation of the reaction vessel according to the present invention, Figure 6 shows the operation of the sewage / wastewater treatment system according to the present invention Flowchart.

First, since a plurality of reactors according to the present invention have the same configuration, one reactor is shown in FIG. In the sewage / wastewater treatment system including a screen tank 200 for removing a large float from the wastewater, the wastewater inlet 212 is formed in the upper end adjacent to the first compartment 214 and the first opening is formed only one side lower end A reaction tank 210 composed of a second compartment 218 communicating with the compartment 214 and having a treatment water outlet 216 formed thereon, and connecting the screen tank 200 and the waste water inlet 212 therebetween. A wastewater inlet pipe 224 provided with an electric valve 222 (hereinafter referred to as a wastewater inlet pipe valve), a water level detection sensor 226 installed in the reactor 210 to detect the level of wastewater, and an outside of the reactor 210. Blower 230 provided and opening and closing of flow path in the middle An electric valve 242 (hereinafter, referred to as an diffuser valve) is installed to connect the lower part of the first and second compartments 214 and 218 and the blower 230 to open and close the flow path. A control valve (252; air discharge pipe valve) is provided to control the air discharge pipe 250 is installed so as to communicate with the first compartment 214, and an electric valve (262; A plurality of reactors (265) is provided is composed of a pressurized air pipe 260 is installed between the blower 230 and the air discharge pipe valve 252 and the first compartment 214 of the air discharge pipe 250 ( 265a are installed in parallel as shown in Fig. 5, and a plurality of valves 222, 242, 252, 262 and blowers 230 (based on the signal output from the water level detection sensor 226) are used. It consists of a control unit 270 for controlling the operation of 230a, the control unit 270 is one side reaction apparatus 265 wastewater During the inflow process, another reactor 265a performs aeration, sedimentation, and discharge processes so that the wastewater is treated without a rest period. The wastewater inflow process includes a wastewater inlet pipe valve 222 and an diffuser valve ( 242) and the air discharge pipe valve 252 is opened and the pressurized air valve 262 is closed to operate the blower 230 so that the waste water is introduced into the reaction tank 210 and the aeration is made at the same time, the aeration process waste water After closing the inlet valve 222, the blower 230 is further operated for a predetermined time, and the precipitation process stops the blower 230 to allow the aerated waste water to settle for a predetermined time, and the discharge process is acid. After the engine valve 242 and the air discharge pipe valve 252 are closed and the air pressure pipe valve 262 is opened, the blower 230 is driven to discharge the treated water.

On the other hand, the lower portion of the reaction tank 210 in the above configuration is connected to the concentration tank and dehydrator although not shown.

In addition, reference numeral 219 in the figure is a lid formed on the upper portion of the first compartment 214, 228 is a check valve for preventing the waste water of the reaction tank 210 flows back to the screen tank 200.

The operation of one side reaction apparatus 265 and 265 of the sewage / wastewater treatment system configured as described above will be described in more detail below with reference to the flowchart of FIG. 6, and the operation of the other reaction apparatus 265a is the one side reaction. When the apparatus 265 performs the wastewater inflow process, aeration and precipitation and discharge processes are executed, and the one side reaction apparatus 265 performs the wastewater inflow process while performing the aeration and precipitation and discharge processes. Omit.

First, the control unit 270 opens the wastewater inlet pipe valve 222, the diffuser valve 242, and the air discharge pipe valve 252, and closes the pressurized air valve 262. By operating 230, the wastewater is introduced into the reactor 210 and the aeration process is performed at the same time (S101). At this time, the air introduced into the first compartment 214 through the diffuser 240 in which the valve 242 is opened by the blower 230 and aerated is air discharge pipe valve 252 because the air discharge pipe ( It is discharged to the outside through the 250, so that the pressure inside the first compartment 214 does not occur.

Then, the controller 270 determines whether the water level inside the reaction tank 210 is equal to or greater than the predetermined value X1 based on the signal output from the water level detection sensor 226 while performing the step S101 (S102). If the water level in the reactor 210 is determined to be equal to or less than the predetermined value X1, the step S101 is repeated, and the water level in the reactor 210 is determined to be equal to or higher than the water level X1 set to proceed with the aeration process. When the waste water inlet pipe valve 222 is closed and the blower 230 is further operated for a predetermined time (set time for aeration), the operation of the blower 230 is stopped so that the sludge is completely settled. Time), the sludge having a weight in the waste water is allowed to settle to the bottom of the reactor 210 and a liquid layer is formed on the reactor 210. (S103)

After performing step S103, the control unit 270 closes the diffuser valve 242 and the air discharge pipe valve 252, opens the pressurized air valve 262, and operates the blower 230 to operate the first compartment ( By increasing the internal air pressure, the treated water in the first compartment 214 is discharged to the second compartment 218 by the air pressure to be discharged to the outside through the treated water outlet 216 (S104). On the basis of the signal output from the detection sensor 226, it is determined whether or not the water level in the reaction tank 210 is lower than another predetermined value (water level so that only the treated water in the upper part is discharged and sludge is not discharged; X2) (S105). If the water level in the reactor 210 is greater than or equal to the predetermined value X2, step S104 is repeatedly executed. If the level is determined to be less than or equal to the predetermined value X2, the process returns to step S101.

On the other hand, since the other reaction device 265a is alternately operated with the one-side reaction device 265, it is possible to continuously treat the wastewater introduced without a rest period.

Therefore, according to the present invention, it is possible to treat sewage / wastewater with a single reactor, and the control unit only needs to control the operation of the blower and the valve, thereby greatly reducing the installation cost and the required site, and simplifying the control structure of the control unit, resulting in failure rate. It is greatly reduced.

According to the sewage / wastewater treatment system according to the present invention as described above, it is possible to treat sewage / wastewater with a single reactor and the control unit only needs to control the operation of the blower and the valve, thereby greatly reducing the installation cost and the required site, and The simple structure of the control structure has the effect of greatly reducing the failure rate, and by installing a plurality of reactors in parallel, it is possible to treat wastewater without rest periods.

Claims (1)

In the sewage / wastewater treatment system comprising a screen tank 200 for removing a large float from the incoming wastewater, The wastewater inlet 212 is formed at an upper end adjacent to the first compartment 214 having only one lower end portion opened, and the second compartment 218 communicating with the first compartment 214 and having a treated water outlet 216 thereon. Wastewater inlet pipe 224 is installed between the reaction tank 210 and the screen tank 200 and the wastewater inlet 212 and the electric valve 222 for controlling the opening and closing of the pipeline in the middle, and The water level detection sensor 226 installed in the reactor 210 to detect the water level of the waste water, a blower 230 provided outside the reactor 210, and an electric valve 242 for controlling the opening and closing of the flow path in the middle are installed. And the diffuser 240 connecting the lower portions of the first and second compartments 214 and 218 to the blower 230, and an electric valve 252 for controlling the opening and closing of the flow path in the middle of the first compartment. An air discharge pipe 250 is installed to communicate with (214), and an electric valve 262 for controlling the opening and closing of the flow path in the middle is provided A reactor 265 and 265a installed in parallel with a blower 230 and a pressurized air engine 260 connecting between the valve 252 and the first compartment 214 of the air discharge pipe 250; Operation of the waste water inlet pipe valve 222, the diffuser valve 242, the air discharge pipe valve 252, the blower 230, and the pressurized air valve 262 based on the signal output from the water level detection sensor 226. By controlling the flow, the wastewater is introduced into the reaction tank 210, and then aeration and precipitation and discharge processes are performed. At this time, one side reaction apparatus 265 is disposed in a plurality of reactors 265 and 265a installed in parallel. While the other reactor (265a) to proceed with the process of aeration, sedimentation and treatment water discharge, while opening the wastewater inlet pipe valve 222 and diffuser valve 242 and air discharge pipe valve 252 and pressurized air valve After closing 262 and operating the blower 230 to proceed with the wastewater inflow process, closing the wastewater inlet pipe valve 222 and operating the blower 230 to proceed the aeration process, and after performing the aeration process blower 230 To stop the precipitation process, and after the precipitation process, the diffuser valve (242 ) And the air discharge pipe valve 252, the pressurized air pipe valve 262 is opened and the blower 230 is operated by the control unit 270 to proceed with the treatment water discharge process, characterized in that the sewage / wastewater treatment system.