JP2010240575A - Wastewater treating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly and securely carry out solid-liquid separation and disinfection of a screen residue. <P>SOLUTION: A plurality of screen residue receptacle bodies 311 each include an inner vessel 311h for storing the screen residue M. Each screen residue receptacle body 311 is so supported as to be transferable by means of a transferring means 312 between a first position where the receptacle body 311 can be supplied with the screen residue M from a solid-liquid separation means 30 and a second position where the receptacle body 311 can be supplied with an antiseptic solution from a supply means 313. When a controller 32 detects the screen residue M has fully filled the inner vessel 311h of the preceding one of the receptacle bodies 311 which has been placed at the first position, the preceding receptacle body 311 is transferred to the second position while the succeeding one of the receptacle bodies 311 to the first position. Then an outlet 311c of an outer vessel 311a of the preceding receptacle body 311 transferred to the second position is closed to receive the antiseptic solution to keep the receptacle body 311 filled therewith for a prescribed time, and then the lapse time is informed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  Prior to the final treatment of wastewater generated from an infectious disease ward or dissection room, the present invention can remove the residue from the wastewater and perform the necessary disinfection on the residue and the wastewater from which the residue has been removed. It is related with the improvement of the apparatus for doing so.

  It is obliged to disinfect wastewater that is at risk of infection in normal treatment prior to final treatment, such as wastewater from infectious disease wards and dissection rooms. Prior to the final treatment, the waste water is solid-liquid separated into waste water from which the residue has been removed, and both are subjected to disinfection treatment. Disinfected waste residue is disposed of in accordance with the Waste Disposal Law, and wastewater from which waste residue has been removed is discharged after disinfection. When chemicals are used for such disinfection treatment, sodium hypochlorite is generally used, and for the residue, sodium hypochlorite with a constant concentration (currently free chlorine concentration of 1000 ppm or more) is fixed for a certain period of time (currently The disinfection process is performed by exposing the residue to one hour).

  For this reason, in this type of wastewater treatment, a draining basket-like slag receiver generally called a bucket screen or the like is used, and wastewater is fed into this slag receiver for solid-liquid separation. Before the debris overflows from the debris receiver, the debris receiver is put in a disinfectant solution to disinfect the debris.

  However, in such a general method, firstly, since waste water is directly fed into the residue receiver, the residue receiver is likely to be clogged, and it is often difficult to achieve proper solid-liquid separation. Secondly, since it is impossible to clearly grasp the timing of disinfecting the residue receiver, the situation of overflowing residue from the residue receiver, that is, the possibility of overflow cannot be wiped out. .

  The main problem to be solved by the present invention is that in this type of wastewater treatment apparatus, solid-liquid separation and disinfection treatment for residue can be performed appropriately and reliably.

In order to achieve the above object, according to the present invention, the waste water treatment apparatus has the following configurations (1) to (7).
(1) A device for treating wastewater from infectious disease wards,
(2) solid-liquid separation means for removing the residue from the waste water;
Disinfection means for the residue removed by the solid-liquid separation means;
Control means,
(4) The disinfecting means includes two or more residue receivers, a means for moving the residue receiver, and a disinfectant supply means.
(5) The screen residue receiver has a screen receiving port at the top and a liquid outlet at the bottom, and the screen residue from the receiving port is removably stored in the external container. And a basket-shaped inner container for storing
(6) Each residue receiver is at least between the first position where the supply means can receive the residue from the solid-liquid separation means and the second position where the supply means can receive the disinfectant solution. Is supported so as to be movable,
(7) When the control means detects that the level of the residue in the inner container of the residue receiver positioned prior to the first position has reached the full tank level, this residue receiver. Is moved to the second position and the subsequent residue receiver is moved to the first position, and then the outlet of the outer container of the residue receiver moved to the second position is closed by the closing means. A disinfecting solution is supplied from the means, and the residue receiver is filled with the disinfecting solution for a certain period of time, and the progress of the certain period of time is notified.

  According to the waste water treatment apparatus of the present invention, the residue from the waste water is first removed by the solid-liquid separation means, and the removed residue is received by the residue receiver. The residue can be separated smoothly and appropriately, and the residue receiver can receive a residue with a low water content and does not cause clogging of the inner container of the residue receiver. Further, when the level of the residue in the inner container of the residue receiver positioned prior to the first position reaches the full tank level, the residue receiver is moved to the second position and the subsequent operation is performed. Since the residue receiver is moved to the first position, the preceding residue receiver is sterilized, and the end thereof is notified, so that the overflow of the residue receiver does not occur. It is possible to surely disinfect all the residue that has been removed from.

FIG. 1 is a configuration diagram showing a schematic configuration of a wastewater treatment apparatus. FIG. 2 is a front configuration diagram showing a detailed configuration of the waste water treatment apparatus. FIG. 3 is a side configuration diagram showing a detailed configuration of the waste water treatment apparatus.

  Hereinafter, based on FIGS. 1-3, an example of the waste water treatment equipment comprised by applying this invention is demonstrated.

  Prior to the final treatment of the so-called infectious wastewater W generated from an infectious disease ward or dissection room, the wastewater treatment apparatus according to this embodiment removes the residue M from the wastewater W, It is used to allow each drainage W from which the residue M has been removed to be subjected to necessary disinfection.

  The waste water W is transferred to the waste water treatment device 3 and separated into solid and liquid. The waste residue M is sterilized in the waste water treatment device 3, and the disinfected residue M is taken out from the waste water treatment device 3 by a worker who is informed of the end of the disinfection treatment by a notification to be described later, and is finally processed. The In the wastewater treatment device 3, the residue M is removed from the wastewater W in the solid-liquid separation means 30 and the residue receiver 311 described later, and the wastewater W from which the residue M has been removed is sent out of the wastewater treatment device 3 and subjected to final treatment. Is done. In the disinfection process, the disinfectant filled in the residue receiver 311 is also sent out of the waste water W device after the disinfection is completed, and is combined with the waste water W from which the residue M is removed in the illustrated example.

  In the illustrated example, waste water W is sent from the primary side tank indicated by reference numeral 1 to the waste water treatment device 3 by the transfer pump indicated by reference numeral 2 in FIG. Is sent from the waste water treatment device 3 to the secondary side tank indicated by reference numeral 4. These liquids (stock solution W ′) collected in the secondary side tank 4 are sent to the final processing step, and sterilized for a certain period of time in a state where the concentration of the drug (currently sodium hypochlorite) is kept constant. After being released.

  The waste water treatment apparatus 3 includes a solid-liquid separation unit 30, a residue M disinfection unit 31, and a control unit 32.

  In the illustrated example, the solid-liquid separation means 30 is provided on the upper portion of the box-shaped main body 33, and the disinfecting means 31 is provided on the inside of the box-shaped main body 33.

  In the illustrated example, the solid-liquid separating means 30 is attached to the drum screen 301 rotatably supported on the upper portion of the box-shaped main body 33, the hood 302 covering the drum screen 301, and the outer peripheral surface of the drum screen 301. A scraper 303 that scrapes the residue M is provided. The drum screen 301 is a hollow body that has a peripheral surface and a filtration surface that allows water to pass through but does not allow residue M to pass. In the illustrated example, the drum screen 301 is disposed on both sides of a vertical line passing through the rotation center 301a of the drum screen 301. It is supported on the box-shaped main body 33 by pulleys 304 respectively provided. One of these pulleys 304 is rotated by a motor denoted by reference numeral 305 to rotate the drum screen 301 in the clockwise direction in FIG. A flow path 302 a for guiding the drainage W is formed on the upper end side of the drum screen 301 in the hood 302, and the upper portion of the box-shaped main body 33 communicates with the inside of the hood 302 at a position directly below the lower end side of the drum screen 301. The waste water W guided to the flow path 302a is allowed to flow into the box-shaped main body 33 in a state where the residue M is adhered to the peripheral surface of the drum screen 301 and filtered. A scraper 303 having an upper end circumscribing the peripheral surface of the drum screen 301 on the side end side is provided on the side end side of the drum screen 301 positioned on the rotation destination side of the drum screen 301 with respect to the upper end of the drum screen 301. The residue M adhering to the peripheral surface as described above is scraped off by the scraper 303 by the rotation of the drum screen 301 and falls. A passage port 331 for the residue M is provided in the upper part of the box-shaped main body 33 immediately below the scraper 303, and the residue M which has been scraped off is located at a first position to be described later through this passage port 331. Stored in 311.

  The control means 32 is typically configured by a computer. The control means 32 is connected to each device constituting the transfer pump 2, the solid-liquid separation means 30, and the disinfection means 31 and a sensor 34 described later, and controls the operation of each of these devices. In addition, the control means 32 notifies the outside of the end of the disinfection processing of the residue receiver 311 that has been moved to the second position described later. This notification is typically made by using not-shown notification means (such as a buzzer or LED provided in a control panel containing the control means 32) connected to the control means 32. Further, if the computer constituting the control means 32 is connected to a known communication means such as a communication network, the person who is not in the vicinity of the waste water treatment apparatus 3 can be notified of the end of the disinfection process.

  The disinfecting means 31 for the residue M is provided with two or more residue receivers 311, a moving means 312 for the residue receiver 311, and a disinfectant supply means 313. In the example shown in the figure, there are two residue receivers 311. Each of the residue receivers 311 has an outer container 311a having an accepting port 311b for the residue M at the top and a liquid outlet 311c at the bottom, and is detachably accommodated in the outer container 311a. It comprises a basket-like inner container 311h that stores residue M from the mouth 311b. The outer container 311a and the inner container 311h are made of a material having corrosion resistance such as polyvinyl chloride resin.

  In the illustrated example, the outer container 311a includes a cylindrical main body 311d, a lower cylindrical portion 311e having an outer diameter smaller than that of the cylindrical main body 311d, a cylindrical lower end of the cylindrical main body 311d, and a cylindrical upper end of the lower cylindrical portion 311e. The upper end of the cylindrical main body 311d serves as the receiving port 311b, and the lower end of the lower cylindrical portion 311e serves as the outflow port 311c.

  Further, in the illustrated example, the inner container 311h has a plurality of passages through a peripheral surface 311i and a bottom surface 311j of a bottomed cylindrical body with an open top surface that has a slightly smaller outer diameter than the inner diameter of the cylindrical main body 311d of the outer container 311a. The liquid hole is formed. In the illustrated example, the space in the outer container 311a is divided into upper and lower portions by a partition body 311g having a net shape or a punching board shape slightly above the connecting portion of the cylindrical main body 311d and the intermediate cylindrical portion 311f of the outer container 311a. The inner container 311h is placed on the partition 311g in the outer container 311a. In this placement state, the upper end of the cylinder of the inner container 311h is positioned below the receiving port 311b of the outer container 311a.

  In the example shown in the figure, the two residue receivers 311 are supported by a vertical shaft 312 a that is pivotally supported on the upper portion of the box-shaped main body 33. The vertical shaft 312 a is rotatably supported on a shaft upper end side by a bearing portion 332 formed on the upper portion of the box-shaped main body 33, and the lower side thereof is positioned in the box-shaped main body 33. The lower end of the vertical shaft 312a is fastened to a position approximately in the middle of the long plate-like bracket body 312b in the length direction. In addition, one of the two residue receivers 311 and 311 is supported on one side of the bracket body 312b across the vertical shaft 312a, and two on the other side of the bracket body 312b across the vertical shaft 312a. The other one of the residue holders 311 and 311 is supported. In the example shown in the drawing, only the lower cylindrical portion 311e of the residue receiving body 311 is inserted into the through hole formed in the bracket body 312b from above, and the intermediate cylindrical portion 311f of the residue receiving body 311 is placed on the bracket body 312b. Residue receptacles 311 are arranged on both sides of the vertical shaft 312a so as to be placed on the top. In the illustrated example, any one of the two residue receivers 311 and 311 supported by the vertical shaft 312a in this way always uses the receiving port 311b of the outer container 311a as the passage port 331 of the box-shaped main body 33. It is designed to be located directly below. The residue receiver 311 can receive the supply of residue M from the solid-liquid separation means 30 immediately below the passage port 331. (Hereinafter, this position is referred to as the first position.)

  Of the two screen residue receivers 311 and 311, the screen residue receiver 311 located at the first position and opposite to the screen residue receiver 311 receives the outer container 311 a immediately below the passage port 331. Since the mouth 311b is not positioned, the residue M is not supplied, but the disinfectant can be supplied from the supply means 313. (Hereinafter, this position is referred to as the second position.)

  In the illustrated example, the disinfecting liquid is supplied from the storage tank of disinfecting liquid constituting the supply means 313 indicated by reference numeral 313a in FIG. 1 into the residue receiving body 311 at the second position by the pump indicated by reference numeral 313b. It is. Inside the box-shaped main body 33, there is provided a movable valve body 314 that closes the outlet 311 c of the outer container 311 a of the residue receiving body 311 at the second position. The movable valve body 314 is provided at a free end of an arm 314a that is rotatably supported by a horizontal member 334 extending between the front and rear side walls 333 and 333 of the box-shaped main body 33, and a rotation shaft of the arm 314a. By operating a power cylinder 314c in which a plunger rod is linked to the outer side of the box-shaped main body 33 to 314b, a valve closing position in which the outlet 311c of the outer container 311a of the residue receiving body 311 is closed at the second position. The movable valve body 314 can be moved over a valve opening position (a position indicated by an imaginary line in FIG. 2) where the valve is opened.

  In the illustrated example, the power cylinder 312c disposed on the upper portion of the box-shaped main body 33 is linked to the vertical shaft 312a. By operating the power cylinder 312c, the vertical shaft 312a is rotated, One of the screen residue receivers 311 and 311 is moved between the first position and the second position. Therefore, the other of the two screen residue receivers 311 and 311 is moved between the second position and the first position. It is possible to move between the two. That is, each residue receiving body 311 has a first position where the moving means 312 can receive the supply of residue M from the solid-liquid separating means 30 and a second position where the supply of the disinfecting liquid from the supplying means 313 can be received. In this example, the moving means 312 is constituted by a vertical shaft 312a rotated by the power cylinder 312c.

In this embodiment, the level of the residue M in the inner container 311h of the residue receiver 311 positioned prior to the first position has reached the full tank level by the control means 32. When this is detected, each of the devices is moved in the following steps (1) to (4). In the illustrated example, a non-contact detection sensor 34 such as an ultrasonic sensor is provided immediately above the first position, and the level of the upper surface of the residue M in the inner container 311h of the residue receiver 311 is determined by this sensor 34. By measuring, it is detected whether or not the full tank level (usually a level that does not immediately cause an overflow) is reached.
(1) Moving stage: The moving means 312 is operated to move the screen residue receiver 311 positioned in advance of the first position to the second position, and the subsequent screen residue receiver 311 to the first position. Move. Until this movement is completed, the operations of the transfer pump 2 and the drum screen 301 are stopped, and when this movement is completed, these operations are resumed.
(2) Valve closing stage: When the movement of (1) is completed, the outlet 311c of the outer container 311a of the residue receiving body 311 moved to the second position is closed by the movable valve body 314 as a closing means. .
(3) Disinfectant filling step: When the closing of (2) is completed, the disinfectant is supplied to the residue receiver 311 which has been moved from the supply means 313 to the second position, and the residue receiver 311 is moved to this position. Fill with disinfectant.
(4) Disinfecting liquid discharge stage: When a predetermined time has elapsed, the above-mentioned (3) closing of the outlet 311c of the outer container 311a of the residue receiver 311 which has been moved to the second position is released, and this residue receiver 311 Let the disinfectant flow down from inside.
Then, when the disinfecting liquid discharging stage is completed, this is notified to the outside as described above. When the operator releases the notification (such as a buzzer), the control means 32 is reset (reset) to the initial state. When the full tank level is detected from this initial state, the respective devices are operated again through the steps (1) to (4) by the control means 32. When such notification is received and the removal of the inner container 311h of the residue receiver 311 at the second position is detected, the notification means is released and the control means 32 is returned to the initial state. You can keep it.

  According to the waste water treatment apparatus 3 according to this embodiment, the residue M is removed from the waste water W by the solid-liquid separation means 30 first, and the removed residue M is received by the residue receiver 311. Therefore, separation of the residue M from the waste water W can be performed smoothly and appropriately in the residue receiver 311 using the solid-liquid separation means 30, and the residue receiver 311 has a low moisture content. Since M is accepted, clogging of the inner container 311h of the residue receiving body 311 will not occur.

  Moisture remaining in the residue M stored in the inner container 311h of the residue receiver 311 in the first position flows down from the outlet 311c of the outer container 311a, and the residue M is removed by the solid-liquid separation means 30. Together with the removed waste water W, the waste water is sent out of the waste water treatment device 3 through the discharge port 335 at the bottom of the box-shaped main body 33.

  Further, when the level of the residue M in the inner container 311h of the residue receiver 311 positioned prior to the first position becomes the full tank level, the residue receiver 311 is moved to the second position. At the same time, the succeeding residue receiver 311 is moved to the first position, and the preceding residue receiver 311 is sterilized by the disinfecting means 31 and finished (the outlet 311c of the outer container 311a of the residue receiver 311). Is closed by a closing means, and the residue receiving body 311 is filled with a disinfectant solution and a certain time has passed), and the disinfection process is completed with this notification as a reminder. The inner container 311h of the body 311 is taken out from the inside of the apparatus, and the sterilized residue M is stored in the final process. The empty inner container 311h is again in the second position and the outer container of the residue receiver 311. 311a It can be carried out without delay the work to be set in. In the example shown in the figure, an open part which is closed by a hatch (not shown) is formed at the upper part of the box-shaped main body 33 and above the residue receiving body 311, and this open part is used. The inner container 311h can be taken out from the inside of the apparatus main body. As a result, at the first position in the apparatus, it is possible to always place the residue receiving body 311 having room to store the residue M, and the overflow of the residue receiving body 311 is not caused. Disinfection treatment can be reliably performed on all of the removed residue M.

  When there are three or more residue receivers 311, typically one of them is positioned at the first position and the other is positioned at the second position, and the remaining residue is left. The receiving body 311 is positioned at an intermediate position between the first position and the second position.

W Wastewater M Waste 3 Wastewater treatment device 30 Solid-liquid separation means 31 Disinfection means 311 Waste residue receptacle 311a Outer container 311b Receiving port 311c Outflow part 311h Inner container 312 Moving means 313 Supply means 32 Control means

Claims (1)

A wastewater treatment device from an infectious disease ward,
Solid-liquid separation means for removing the residue from the waste water;
Disinfection means for the residue removed by the solid-liquid separation means;
Control means,
The disinfecting means includes two or more residue receivers, a means for moving the residue receiver, and a disinfectant supply means.
The slag receptacle has an slag receiving port at the top and a liquid outlet at the bottom, and a basket that is removably stored in the outer container and stores scum from the receiving port. And an inner container
Each residue receiver is moved by the moving means between at least a first position where the supply of residue from the solid-liquid separation means can be received and a second position where the supply of disinfectant liquid from the supply means can be received. Supported as possible,
When the control means detects that the level of the residue in the inner container of the residue receiver positioned prior to the first position has reached the full tank level, this residue receiver is moved to the second position. And the subsequent residue receiver is moved to the first position, and then moved to the second position, and the outlet of the outer container of the residue receiver is closed by the closing means to disinfect the supply means. A wastewater treatment apparatus characterized in that a liquid is supplied, the residue receiver is filled with the disinfectant for a certain period of time, and the progress of the certain period of time is notified.

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