KR101660087B1 - Sewage treatment system and method for controlling the same - Google Patents

Abstract

A wastewater treatment system and its control method are disclosed. The waste water treatment system and the control method thereof according to the embodiment of the present invention minimize the number of level sensors that sense the amount of stored sewage and treated water, thereby reducing the manufacturing and installation costs, In the event of an abnormality in the process, it is possible to reduce the time and effort required for repair and inspection, thereby improving safety in operation.

Description

TECHNICAL FIELD [0001] The present invention relates to a sewage treatment system and a control method thereof,

The present invention relates to a wastewater treatment system for electrolyzing wastewater and treating the wastewater, and a wastewater treatment system capable of minimizing the number of level sensors for sensing a storage amount of wastewater and a storage amount of wastewater generated by electrolysis of wastewater, And a control method.

A wastewater treatment system for electrolyzing wastewater containing waste manure and domestic wastewater discharged from a toilet is provided with a wastewater storage tank for storing wastewater and a means for measuring the amount of stored wastewater is generally provided in the wastewater storage tank .

Flammable gas such as methane gas may be generated in the wastewater stored in the wastewater storage tank, and explosive hydrogen gas may be generated in the process of electrolyzing the wastewater. When these materials are ignited, there is a high possibility of an accident such as an explosion or a fire. Therefore, the wastewater treatment system is carefully designed so that the electric sparks do not come into contact with these materials.

In particular, the level sensors installed in the treatment water storage tank storing the treatment water generated by electrolysis of the wastewater storage tank and the wastewater are in direct contact with the wastewater and the treatment water, so that a level sensor designed to be explosion-proof type should be used. Since the explosion-proof level sensor is manufactured to have high airtightness, the price is considerably higher than that of a general level sensor.

An example of a wastewater treatment system using a level sensor is Korean Patent Registration No. 10-1157145 (hereinafter referred to as "Prior Art 1"). In the illustrated prior art 1, a plurality of level sensors are provided to sense the amount of wastewater or treated water.

However, since such a level sensor is quite expensive as described above, application of a plurality of level sensors becomes one of the main causes for increasing the cost of constructing the wastewater treatment system. Therefore, there is an urgent need to reduce the number of level sensors provided in the wastewater treatment system.

Also, since the sewage treated by the wastewater treatment system contains a large amount of solid matter, there is a case where the solidification is accumulated in the pipe during the operation of the wastewater treatment system, the pipe is clogged, the wastewater or the treated water does not flow smoothly .

At present, the wastewater treatment system merely generates an emergency alarm when an abnormality as described above occurs. However, when an emergency alarm occurs, the entire system must be inspected to find the problematic part, so that the repair or maintenance of the wastewater treatment system It takes a lot of time and effort.

Korean Registered Patent No. 10-1157145 (Title of the Invention: Manure disposal system and manure disposal method using manure disposal system, registered on June 11, 2012)

Embodiments of the present invention are intended to minimize the number of level sensors that sense the amount of stored sewage and treated water.

Also, the embodiment of the present invention is intended to generate different alarms according to the part where the abnormality occurs.

According to an aspect of the present invention, there is provided a wastewater treatment system including a wastewater storage tank for storing wastewater, a first level sensor disposed inside the wastewater storage tank, a second level sensor disposed above the first level sensor, An electrolytic unit connected to the waste water storage tank through a connection pipe, a transfer pump installed in the connection pipe, and an electrolytic water supply unit connected to the electrolytic unit, An electrolytic water feeding inlet, an electrolytic water inlet valve provided at the electrolytic milk feeding inlet and opening / closing the electrolytic milk feeding inlet, a process water storage tank connected to the electrolytic means through a feeding pipe, And a fifth level sensor disposed above the fourth level sensor, wherein the fourth level sensor is disposed inside the process water storage tank, And a drain pump connected to the treated water storage tank, and a drain pump installed in the drain pipe. According to a signal generated by the water amount sensing means, the electrolyzer is operated, the transfer valve is opened and closed, the electrolytic water inlet valve is opened and closed And the operation of the discharge pump is controlled according to a signal generated by the processed water sensing means, and the electrolytic water inflow valve is opened and the transfer pump regulates the electrolytic milk infusion The electrolytic water may be supplied to the waste water storage tank through the electrolytic means.

Here, the electrolytic water may be seawater or an electrolyte mixed with fresh water.

The sewage amount sensing means includes a first support member, one end of which is detachably coupled to the bottom surface of the wastewater storage tank and the other end is connected to the upper side of the waste water storage tank, and the first level sensor, The third level sensor may be fixed to the support member.

The treatment amount sensing means may include a support member, one end of which is detachably coupled to the bottom surface of the treated water storage tank and the other end is connected to the upper side of the treated water storage tank, and the fourth level sensor and the fifth level sensor May be fixed to the second support member, respectively.

According to another aspect of the present invention, there is provided a method of controlling the wastewater treatment system, comprising: a back washing step in which the electrolytic water flows into the wastewater storage tank through the electrolytic means so that the water level of the electrolytic water reaches the second level sensor; A storage step in which the wastewater is stored in the wastewater storage tank; and when it is detected that the level of the mixture in which the wastewater and the electrolytic water are mixed reaches the third level sensor, the mixture is transferred to the electrolysis means , The mixture is electrolyzed through the electrolytic means to generate treated water, and the treated water is transferred to the treating bath.

Here, in the electrolysis step, when the level of the mixture is not reached to the first level sensor through the second level sensor within a predetermined time after the transfer pump is operated, the operation of the transfer pump is stopped, An abnormal alarm may be generated.

Alternatively, in the electrolysis step, when the level of the mixture is sensed by the third level sensor beyond a predetermined time after the transfer pump is activated, the operation of the transfer pump is stopped and a sewage water level alarm is generated .

The control method of the wastewater treatment system may further include a control unit for controlling the amount of treated water to be discharged through the discharge pipe when the level of the treated water stored in the treated water storage tank is detected by the treated water detection unit And a discharge step in which the discharge pump is operated.

Here, in the discharging step, if the level of the treated water is not reached to the fourth level sensor within a predetermined time after the discharge pump is operated, the discharge pump may be stopped and a discharge abnormal alarm may be generated .

Alternatively, in the discharging step, when the level of the treated water is sensed by the fifth level sensor beyond a predetermined time after the discharge pump is operated, the discharge pump is stopped and a treatment water level alarm is generated .

According to the embodiment of the present invention, the number of level sensors for sensing the amount of stored wastewater and treated water is minimized, thereby reducing the cost of manufacturing and installing the wastewater treatment system.

In addition, according to the embodiment of the present invention, it is possible to save time and effort required for repair and inspection by controlling different alarms to be generated according to the parts that need to be inspected when an abnormality occurs in the process of processing wastewater, Can be improved.

1 is a schematic diagram of a wastewater treatment system according to an embodiment of the present invention.
2 is a flowchart for explaining the control method of the wastewater treatment system shown in FIG. 1

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a wastewater treatment system according to an embodiment of the present invention.

1, a wastewater treatment system 1 according to an embodiment of the present invention includes a wastewater storage tank 10, a waste water amount sensing means 20, an electrolysis means 40, a treated water storage tank 50, The sensing unit 60, the water inlet 71, the electrolytic water supply inlet 72, the connection pipes 73 and 74, the transfer pipe 75, the discharge pipe 76, the transfer pump 81, the discharge pump 82, An electrolytic water inflow valve 83, a transfer valve 84, a check valve 88, and the like.

The wastewater storage tank 10 is a tank in which wastewater flowing through the wastewater inlet 71 is stored. The waste water storage tank 10 may be manufactured to have a proper capacity at a place where it is installed.

For reference, the wastewater treatment system 1 according to an embodiment of the present invention can be applied to various places such as a transportation means that a large number of passengers such as a ship or a train are aboarded to move for a long time, a portable toilet installed on a construction site or a park.

Accordingly, the sewage may include various kinds of sewage discharged from the toilet, living sewage discharged from the bathroom or kitchen, and the like. Such sewage may contain a large amount of solids such as feces.

The sewage amount sensing means 20 is installed in the waste water storage tank 10. The sewage amount sensing means 20 includes a first level sensor 21, a second level sensor 22, a third level sensor 23, a head 25 And a first support member 26 and the like.

One end of the first supporting member 26 may be coupled to the inner bottom surface of the waste water storage tank 10 and the other end may be connected to the upper side. The first support member 26 is for fixing the first to third level sensors 21, 22, 23 in a fixed position in the waste water storage tank 10.

A circuit for receiving and processing the electrical signals of the first to third level sensors 21, 22, 23 may be incorporated in the head 25. To this end, the first to third level sensors 21, 22, 23 are connected to the head 25 by a plurality of cables 24.

The plurality of cables 24 are respectively fixed to the first support members 26 by the binders 27a, 27b and 27c so that the first to third level sensors 21, 22, Respectively.

The first to third level sensors 21, 22 and 23 are sequentially arranged from the lower side to the upper side of the wastewater storage tank 10. That is, as shown in the drawing, the first level sensor 21 is disposed inside the wastewater storage tank, the second level sensor 22 is disposed above the first level sensor 21, and the third level sensor 23 Is disposed on the upper side of the second level sensor 22.

Accordingly, the amount of wastewater stored in the wastewater storage tank 10 can be calculated by sensing the level of wastewater by the first to third level sensors 21, 22, and 23.

On the other hand, the first to third level sensors 21, 22, and 23 may be required to be replaced due to aging due to long-term use. Therefore, the lower end of the first support member 26 can be detachably coupled to the bottom surface of the waste water storage tank 10 for the convenience of replacement.

Here, as the detachable coupling, a bracket provided on the bottom surface of the waste water storage tank 10 and an end of the first support member 26 are coupled to a releasable fastening member such as a bolt and a nut.

For reference, as described above, the first to third level sensors 21, 22, and 23 and the fourth and fifth level sensors 61 and 62 to be described below are those that are subjected to explosion-proof authentication, An electric part called a barrier for reducing a voltage and a current to be supplied is used together to prevent spark from being generated in the contact. A barrier (not shown) may be installed in the head 25.

Here, the level sensor having explosion-proof certification is 100,000 won line, and the barrier is 20-300 thousand won line, the unit price thereof may be several tens times higher than the general level sensor having 1 to 20,000 won line. Therefore, as the number of level sensors 21, 22, 23, 61, 62 used in the wastewater treatment system 1 is minimized, the manufacturing and installation cost of the wastewater treatment system 1 can be reduced. This is explained below again.

The electrolytic means 40 is a means for electrolyzing the mixture S in which the wastewater stored in the wastewater storage tank 10 and the electrolytic water to be described below is electrolyzed. When the various substances contained in the wastewater are discharged to the outside, So as to be in a non-contaminated state. The electrolytic means 40 is exemplified in detail in the above-mentioned prior art 1, and a detailed description thereof will be omitted.

The waste water storage tank 10 and the electrolytic means 40 are connected to each other through a connection pipe 74. The connection pipe 74 is provided with a transfer pump 81 and a valve 86, Further, the electrolytic means 40 is connected to another connection pipe 73 as shown in the figure. The connection pipe 73 is provided with a valve 85 and the connection pipe 73 is connected with the electrolytic water supply inlet pipe 72. The valve 85 opens and closes the connection pipe 73.

Electrolytic water may be introduced into the electrolytic water supply inlet pipe 72. The electrolytic water used in the wastewater treatment system 1 may be a mixture of electrolytes in seawater or fresh water.

For example, when the wastewater treatment system (1) is installed on a ship, it is possible that the marine water introduced through the electrolytic milking inlet (72) is used as electrolytic water when the vessel is operating in the ocean, In the middle, it is possible to mix electrolytes such as salt into the river water to be used as electrolytic water.

The electrolytic water inflow valve 83 may be provided with an electrolytic water inflow valve 83 and a strainer 89. The electrolytic water inflow valve 83 opens and closes the electrolytic water inflow inlet 72 and the strainer 89 is included in electrolytic water Filtered foreign matter. Although not shown, a filter or a screen for filtering foreign substances contained in seawater or fresh water may be further provided at the end of the electrolytic water inflow inlet 72.

A transfer pipe 75 is connected to the connecting portion of the electrolytic water supply inlet pipe 72 and the connection pipe 73 and the transfer pipe 75 is connected to the process water storage tank 50. Therefore, the electrolytic means 40 and the treated water storage tank 50 are connected through the transfer pipe 75. The transfer pipe 75 is provided with a transfer valve 84 which opens and closes the transfer pipe 75.

The treated water storage means 50 is a tank in which the aforementioned treated water W is stored and the treated water detecting means 60 is installed in the treated water storage tank 50 to detect the stored amount of the treated water W.

The processed quantity sensing means 60 includes a fourth level sensor 61, a fifth level sensor 62, a head 65 and a second support member 66.

One end of the second support member 66 may be coupled to the inner bottom surface of the process water storage tank 50 and the other end may be connected to the upper side. The fourth level sensor 61 and the fifth level sensor 62 are connected to a head 65 provided on the upper side of the process water reservoir 60 by a plurality of cables 64. The cable 64 is connected to the binders 67a, 67b so that the fourth and fifth level sensors 61, 62 are disposed at suitable positions.

Since the constituent elements of the processed quantity sensing means 60 correspond to each other except that the number of the level sensors 61 and 62 is one less than the constituent elements of the water amount sensing means 20 described above, ) Will be described in detail with reference to the description of the sewage amount detecting means 20.

A discharge pipe 76 is connected to the process water storage tank 50 and a discharge pump 82 and a check valve 88 are installed in the discharge pipe 76.

Here, the discharge pump 82 causes the treated water W to be discharged through the discharge pipe 76 to the outside of the wastewater treatment system 1, the operation of which will be described below. The check valve 88 discharges the treated water W through the discharge pipe 76 but does not allow an external substance to flow into the wastewater treatment system 1. [

As described above, the air in the upper space of the waste water storage tank 10 may be mixed with a combustible gas such as methane gas generated in the wastewater. ) May be mixed with the hydrogen gas generated from the hydrogen gas.

When the combustible gas and the hydrogen gas are mixed with air at a certain ratio, an explosion may occur due to the spark or the like generated at the terminals of the electric parts included in the wastewater treatment system 1. Vent pipes 77 and 78 for discharging flammable gas and hydrogen gas may be installed above the wastewater storage tank 10 and the treated water storage tank 50 to prevent this.

Although not shown, the end portions of the vent pipes 77 and 78 may extend outside the wastewater treatment system 1 so that methane gas, hydrogen gas, or the like is discharged into the atmosphere.

The wastewater treatment system 1 having the above-described structure controls the operation of the electrolytic means 40, the opening and closing of the feed valve 84, the opening and closing of the electrolytic water inflow valve 83, The operation and the direction of the operation of the opening and closing pump 81 are controlled and the operation of the discharge pump 82 is controlled according to the signal emitted by the treated water sensing means 60.

On the other hand, in the wastewater treatment system 1, when the electrolytic water inflow valve 83 is opened and the transfer pump 84 is operated to introduce the electrolytic water through the electrolytic water inflow inlet 72, the electrolytic water passes through the electrolytic means 40 And flows into the waste water storage tank 10. In this process, the substances remaining in the electrolytic unit 40 flow into the waste water storage tank 10 according to the flow of the electrolytic water, so that the inside of the electrolytic unit 40 can be washed.

The reason why the electrolytic water is introduced into the wastewater storage tank 10 is that the electrolytic water is discharged in an appropriate amount before the wastewater is introduced into the wastewater storage tank 10 in addition to the back flushing effect of removing the residues in the electrolytic means 40 So that the solids contained in the wastewater can be prevented from being settled and fixed to the bottom surface of the wastewater storage tank 10, and if there is any settled sediment, the sediment can be stripped from the bottom surface, .

Therefore, in order to increase the floating effect of the solids on the bottom surface of the waste water storage tank 10 due to the inflow of the electrolytic water, the connection pipe 74 can be connected to a portion near the bottom of the waste water storage tank 10 as much as possible, Even when the mixture S flows into the electrolytic means 40, the residual amount of the mixture in the waste water storage tank 10 can be minimized.

The operation of the sewage treatment system 1 will be described in detail with reference to FIG.

FIG. 2 is a flow chart for explaining the control method of the wastewater treatment system shown in FIG. 1 will be described together.

Referring to FIGS. 1 and 2, a method of controlling a wastewater treatment system according to an embodiment of the present invention includes a backwashing step (S10), a storing step (S20), and an electrolyzing step (S30).

The backwashing step S10 is a step for allowing the electrolytic water to flow into the waste water storage tank 10 through the electrolytic means 40 so that the water level of the electrolytic water reaches the second level sensor 22. [

That is, in the backwashing step S10, the electrolytic water inflow valve 83 is opened and the transfer pump 81 is operated so that the electrolytic water flows through the electrolytic water inflow inlet 72, the connection pipe 73, The electrolytic solution 40, and the connection pipe 74 to the waste water storage tank 10.

The level of the electrolytic water gradually increases as the electrolytic water is introduced into the wastewater storage tank 10. When the level of the electrolytic water is detected to reach the second level sensor 22, the operation of the transfer pump 81 is stopped, So that the valve 83 closes the electrolytic water supply inlet tube 72.

Therefore, in the backwashing step S10, the electrolytic water passing through the electrolytic means 40 is backwashed to allow the substances remaining in the electrolytic means 40 to flow into the waste water storage tank 10, The electrolytic water is introduced into the waste water storage tank 10 until the water level reaches the second level sensor 22.

The storing step S20 is a step in which the wastewater is stored in the wastewater storage tank 10.

As the wastewater flowing through the wastewater inlet 71 is stored in the wastewater storage tank 10, the water level of the mixture S mixed with the electrolytic water flowing into the wastewater storage tank 10 gradually increases. That is, the water level of the mixture S is sensed by the second level sensor 21 and gradually becomes close to the third level sensor 23.

At this time, the transfer pump 81 and the electrolytic means 40 are not operated, and the electrolytic water inflow valve 83 is maintained in a state in which the electrolytic water inflow inlet 72 is closed.

When the wastewater flows into the wastewater storage tank 10 and the level reaches the third level sensor 23, that is, when the level of the wastewater is sensed by the third level sensor 23, the electrolysis step S30 .

In the electrolysis step S30, the mixture S is transferred to the electrolytic means 40, electrolyzed by the electrolytic means 40 to generate treated water, and the generated treated water is supplied to the treated water storage tank 50 ≪ / RTI >

For this, in the electrolysis step S30, the transfer valve 84 is opened, and the transfer pump 81 transfers the mixture S in the waste water storage tank 10 to the connection pipe 74, the electrolytic means 40, The electrolytic solution 40 is operated to be introduced into the treatment water reservoir 50 via the pipe 73 and the transfer pipe 75 and electric power is supplied to the electrolytic means 40 to electrolyze the mixture S. That is, the mixture S of the wastewater and the electrolytic water flows from the wastewater storage tank 10 to the treated water storage tank 50 along the path indicated by the solid arrow in the figure.

Hydrogen gas and chlorine ions are generated in the electrode during the electrolysis of the mixture (S). Therefore, a large amount of chlorine ions is contained in the treated water, so that when the treated water is directly discharged to the ocean or river, it can adversely affect the environment.

In order to prevent this, in the electrolysis step (S30) electrolytic water is mixed in the treated water so that the concentration of the chlorine ion can be lowered. This can be implemented by causing the electrolytic water inlet valve 83 to open in the electrolysis step S30 so that the treated water and the electrolytic water flow together into the treated water storage tank 50 through the transfer pipe 75. [

Although not shown, the electrolytic water supply inlet pipe 72 may be provided with a pump for allowing the electrolytic water to flow through the electrolytic water supply inlet pipe 72 when the electrolytic water inlet valve 83 is opened.

For reference, it is optional to allow the electrolytic water to flow into the treated water storage tank 50 together with the electrolytic water in the electrolytic step S30. In the following, electrolytic water is mixed with the treated water generated by the electrolytic means 40 The water that has flowed into the water storage tank 50 will be collectively referred to as treated water W.

As the amount of the treated water W introduced into the treated water storage tank 50 gradually increases during the electrolysis step S30, the water level of the treated water W gradually increases.

Therefore, in the electrolysis step S30, the level of the treated water W is first sensed by the fourth level sensor 61 disposed below the treated water storage tank 50, and the inflow amount of the treated water W is increased The level of the treated water W is sensed by the fifth level sensor 62, an unillustrated discharge step is started.

In the discharge step, the discharge pump 82 is operated so that the process water W is discharged from the treatment water storage tank 50 through the discharge pipe 76 to the outside of the wastewater treatment system 1. [

On the other hand, as the electrolysis step S30 described above proceeds, the water level of the mixture S in the waste water storage tank 10 gradually decreases. Therefore, it is normal that the water level of the mixture S is sequentially sensed by the first level sensor 21 from the third level sensor 23 via the second level sensor 22.

However, as described above, when the mixture S containing the wastewater and the electrolytic water contains a large amount of solid matter, the mixture S is discharged from the wastewater storage tank 10 through the electrolytic means 40, 50 may be partially clogged or completely blocked. That is, the flow rate of the mixture S during the electrolysis step S30 may be slowed or the flow of the mixture S may be stopped.

When the mixture S is left in this state for a long time, the mixture S in the wastewater storage tank 10 reaches the full water level, the wastewater can not flow into the wastewater inlet 71 and the wastewater flows back to the toilet connected to the wastewater inlet 71, The transfer pump 81 may be overloaded, resulting in overheating or failure.

Therefore, in the electrolysis step S30, a confirmation step (S40) for confirming whether the mixture S is normally carried out can be performed. If the transfer is abnormal, an alarm is generated so that the wastewater treatment system 1 is checked An additional checking step S41 may be performed.

The alarm generated in the checking step S41 may be divided into two types depending on the situation.

The first alarm is a transfer abnormal alarm, which occurs when the mixture S flows from the waste water storage tank 10 to the process water storage tank 50, but the flow rate is slow. That is, this may be the case where the flow path of the mixture S is partially blocked or the performance of the transfer pump 81 is deteriorated.

The water level of the mixture S reaches the third level sensor 23 and the water level of the mixture S within the predetermined time after the transfer pump 81 starts to be operated to flow the mixture S to the process water storage tank 50 When the first level sensor 21 is not reached via the second level sensor 22, the operation of the transfer pump 81 is stopped and a transfer abnormal alarm can be generated. Here, the predetermined time may be determined by calculation or experiment.

The second alarm is a sludge high water level alarm, which occurs when the mixture S flows from the wastewater reservoir 10 to the process water reservoir 50 little or none at all. That is, this may be the case where the flow path of the mixture S is severely clogged or the feed pump 81 is not operated.

Until the level of the mixture S reaches the third level sensor 23 and the transfer pump 81 starts to operate the mixture S to flow into the process water reservoir 50 until the predetermined time is exceeded S is continuously sensed by the third level sensor 23, the operation of the transfer pump 81 is stopped and a sewage high water level alarm is generated. Here, the predetermined time may be determined by calculation or experiment.

When the feeding abnormality alarm or the sewage high water level alarm is generated as described above, the state of the feeding pump 81 is checked, and if the feeding pump 81 is abnormal, the feeding pump 81 can be repaired or replaced, The valves 84, 85, and 86 installed in the flow path of the electrolytic solution 40, the electrolytic solution 40, the connection pipes 73 and 74, and the transfer pipe 75 are blocked by the solids Appropriate treatment can be performed.

After the completion of the inspection step S41, the electrolysis step S30 can be completed and the continuous operation of the wastewater treatment system 1 is confirmed (S50). Thereafter, the backwashing step S10).

As the electrolytic water flows into the waste water storage tank 10 through the electrolytic means 40 as described above, when the backwashing step S10 is performed again, Backwashing can be performed in which the materials remaining in the decomposing means 40 are washed by the flowing electrolytic water. Therefore, it is possible to prevent foreign matter from being left in the electrolytic means 40 for a long time to be fixed.

On the other hand, in the discharge stage, the treated water W may not be discharged smoothly from the treated water storage tank 50. That is, this may be the case where an abnormality occurs in the discharge pump 82 or the discharge pipe 76 is blocked for some reason.

The electrolytic step S30 can not be performed because the treated water can not be stored in the treated water storage tank 50 for a long time or the drain pump 82 is overloaded, May occur.

Therefore, in the unexplored discharge stage, a step of checking whether the discharge of the treated water W is normal can be performed, and in the case where the discharge is abnormal, the alarm can be generated so that the wastewater treatment system 1 is checked .

If there is an abnormality in the discharge of the treated water (W), the alarm generated can be divided into two types depending on the situation.

The first alarm is a discharge abnormality alarm. After the level of the treated water W is sensed by the fifth level sensor 62 and the discharge pump 82 is operated, the water level of the treated water W is raised within a predetermined time When the fourth level sensor 61 is not reached, the operation of the transfer pump 82 may be stopped and a discharge abnormality alarm may be generated. Here, the predetermined time may be determined by calculation or experiment.

The second alarm occurs when the treated water W is discharged through the discharge pipe 76 with little or no discharge. That is, the discharge pipe 76 may be severely clogged or the discharge pump 82 may not be operated.

The water level of the process water W is supplied to the fifth level sensor 62 until the level of the process water W reaches the fifth level sensor 62 and exceeds the predetermined time after the discharge pump 82 starts to operate, The operation of the discharge pump 82 can be stopped and a treatment water level alarm can be generated. Here, the predetermined time may be determined by calculation or experiment.

If an abnormal discharge alarm or disposal water level alarm occurs, the valve 87 may be closed and the discharge pump 82 and the discharge pipe 76 may be checked to take appropriate measures.

As described above, in the control method of the wastewater treatment system according to an embodiment of the present invention, when an abnormality occurs in the process of wastewater treatment, different alarms may be generated depending on the parts requiring inspection or repair.

Therefore, the time and effort required for repairing and inspecting the wastewater treatment system 1 can be saved, and the safety can be improved by stopping the operation of the wastewater treatment system 1 immediately depending on the situation.

The position where the first to third level sensors 21, 22 and 23 are disposed and the position where the fourth and fifth level sensors 61 and 62 are disposed in the process water storage tank 50 Can be determined in consideration of the shape and the capacity of the wastewater storage tank 10 and the treated water storage tank 50.

For reference, although not shown, a sewage treatment system 1 according to an embodiment of the present invention includes a control unit not shown.

The control unit receives a signal according to the level of the mixture S sensed by the waste water amount sensing means 20 and a signal corresponding to the water level of the treated water W sensed by the treatment amount sensing means 60, Controls the opening and closing of the electrolytic water inflow valve 83 and the transfer valve 84 and controls the operation of the transfer pump 81 and the discharge pump 82 according to the program It is possible to generate the alarm signals as described above.

That is, a series of operations according to the control method of the wastewater treatment system according to an embodiment of the present invention can be automatically performed by the control unit.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that those skilled in the art of the present invention, Other embodiments may easily be proposed by adding, changing, deleting, adding, or the like of components within the scope of the present invention, but this also falls within the scope of the present invention.

1: sewage treatment system 10: sewage storage tank
20: sewage amount detecting means 21: first level sensor
22: second level sensor 23: third level sensor
24: cable 26: first supporting member
27a, 27b, 27c: binder 40: electrolytic means
50: treated water storage tank 60: treated water detecting means
61: fourth level sensor 62: fifth level sensor
64: cable 66: second supporting member
67a, 67b: binder 71:
72: electrolytic feeding infusion 73: connection pipe
74: connector 75: transfer pipe
76: discharge pipe 81: transfer pump
82: discharge pump 83: electrolytic water inflow valve
84: Transfer valve 85, 86, 87: Valve
88: Check valve S: Mixture
W: Processed

Claims (10)

A sewage reservoir in which sewage is stored;
A second level sensor disposed on the upper side of the first level sensor and a third level sensor disposed on the upper side of the second level sensor, ;
An electrolytic unit connected to the waste water storage tank through a connection pipe;
A transfer pump installed in the coupling pipe;
An electrolytic feeding inlet connected to the electrolytic means and having electrolytic water introduced therein;
An electrolytic water inflow valve installed in the electrolytic water inflow inlet and opening / closing the electrolytic water inflow inlet;
A treated water storage tank connected to the electrolytic means through a transfer pipe;
A transfer valve installed in the transfer tube for opening and closing the transfer tube;
A fourth level sensor disposed in the lower side of the treated water storage tank, and a fifth level sensor disposed above the fourth level sensor;
A discharge pipe connected to the process water storage tank; And
And a discharge pump installed in the discharge pipe,
The electrolytic water supply valve is opened and closed and whether or not the feed pump is operated and the feeding direction are adjusted according to a signal generated by the water amount sensing means,
The operation of the discharge pump is controlled according to a signal generated by the processed water sensing means,
When the electrolytic water inflow valve is opened and the transfer pump is operated to introduce the electrolytic water through the electrolytic water inflow inlet, the electrolytic water is introduced into the waste water reservoir through the electrolytic means, the electrolytic means is backwashed,
The electrolytic water inflow valve is opened and the transfer pump is operated until the level of the electrolytic water reaches the second level sensor so that the electrolytic water flows into the waste water storage tank through the electrolytic means and backwashes.
The method according to claim 1,
And a vent pipe connected to an upper side of the treated water storage tank and the wastewater storage tank to discharge gas inside.
The method according to claim 1,
Wherein the sewage amount sensing means includes a first support member, one end of which is detachably coupled to the bottom surface of the wastewater storage tank and the other end is connected to the upper side of the wastewater storage tank,
Wherein the first level sensor, the second level sensor, and the third level sensor are fixed to the support member, respectively.
The method according to claim 1,
Wherein the treated water sensing means includes a second support member, one end of which is detachably coupled to the bottom of the process water reservoir and the other end thereof is connected to the upper side of the process water reservoir,
And the fourth level sensor and the fifth level sensor are fixed to the support member, respectively.
A control method of the sewage treatment system according to any one of claims 1 to 4,
A backwashing step in which the electrolytic water inflow valve is opened, the transfer pump is operated until the level of the electrolytic water reaches the second level sensor, and the electrolytic water flows into the waste water storage tank through the electrolytic means;
Storing the wastewater in the wastewater reservoir; And
When the level of the mixture of the wastewater and the electrolytic water in the wastewater storage tank is detected to reach the third level sensor, the mixture is transferred to the electrolytic means, and the mixture passes through the electrolytic means, Wherein the process water is transferred to the process water storage tank, and the process water is transferred to the process water storage tank.
6. The method of claim 5,
In the electrolysis step,
Wherein the operation of the transfer pump is stopped and a transfer abnormality alarm is generated when the level of the mixture is not reached to the first level sensor via the second level sensor within a predetermined time after the transfer pump is operated, / RTI >
6. The method of claim 5,
In the electrolysis step,
Wherein when the level of the mixture is sensed by the third level sensor beyond a predetermined time after the transfer pump is operated, the operation of the transfer pump is stopped and a sewage high water level alarm is generated.
6. The method of claim 5,
And a discharge step in which the discharge pump is operated so that the process water is discharged through the discharge pipe when the level of the treated water stored in the process water storage tank reaches the fifth level sensor by the processed water detection means A control method of the wastewater treatment system.
9. The method of claim 8,
In the discharging step,
Wherein when the level of the treated water is not reached to the fourth level sensor within a predetermined time after the discharge pump is operated, the operation of the discharge pump is stopped and an discharge abnormality alarm is generated.
9. The method of claim 8,
In the discharging step,
A control method of a waste water treatment system in which the operation of the discharge pump is stopped and a treatment water level alarm is generated when the level of the treated water is sensed by the fifth level sensor exceeding a predetermined time after the discharge pump is operated .

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