JPH0929224A - Waste liquid treatment method and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste liquid treatment method for effective waste liquid control by surely grasping data on individual waste liquid containers when, in a facility such as university, laboratory, and hospital, a small quantity and many kinds of waste liquids discharged from waste liquid sources are received by a centralized waste liquid treatment station with small containers to be treated separately. SOLUTION: Bar codes 2 in which the specific number of the container, the source and classification of waste liquid are recorded are given respectively to waste liquid containers 1 in each of which the waste liquid is stored according to determined classification. In a centralized treatment station, the bar codes are read out 5, the waste liquid is measured 7 and stored, and the bar codes are read out 11 again when a waste liquid is treated so that a computer prepares waste liquid distribution data indicating the place and quantity of the waste liquid based on discharge source and classification of the waste liquid. The discharge source of the waste liquid receives the data by a transmission means 18 and adjusts the delivery of the waste liquid by itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in facilities such as universities, research laboratories, and hospitals, collects small amounts of various kinds of waste liquid discharged from various waste liquid discharge sources in small containers at a central waste liquid treatment plant and separates them. The present invention relates to a waste liquid treatment method and apparatus for accurately grasping information regarding individual small containers and performing efficient waste liquid management.

[0002]

2. Description of the Related Art In facilities such as universities, research laboratories, and hospitals, various kinds of waste liquid are discharged from various waste liquid discharge sources such as laboratories, though relatively small amounts. Recently, these waste liquids have been centrally processed in each facility. In this case, these waste liquids are treated by treatment steps classified into several types according to their respective chemical / physical properties and legal regulations. Therefore, normally, the waste liquid discharge source of each laboratory (hereinafter simply referred to as "discharge source") is, for example, easily twistable organic waste liquid, flame retardant organic waste liquid, inorganic waste liquid, photographic waste liquid, waste oil, etc. These waste liquids are sorted and put into small containers, for example, so-called poly containers, which are classified according to each processing step, and when the containers are full, they are carried into a centralized treatment plant in the facility.

In a centralized treatment plant (hereinafter, simply referred to as "treatment plant"), various types of waste liquids that are irregularly carried in are stored in small containers until a certain quantity is accumulated, or Or transfer to a storage tank classified according to the treatment method and store until reaching a certain amount, and in each case, when the amount reaches a certain amount, put the contents into the treatment process corresponding to each category and waste liquid Perform processing. During this process, the treatment plant manages the classification of the small containers that have been carried in, the quantity management of the waste liquid that is input to the processing process, the return management of the empty small containers, the charge management for each discharge source, and the comprehensive management of the waste liquid in the facility. A series of management operations such as distribution adjustment management are performed.

[0004]

[Problems to be Solved by the Invention]
It is extremely complicated for a worker to inspect and check the type and quantity of each small container that is brought in by an indefinite amount every day at irregular times, and fill in a ledger, etc. There was a possibility that there was a mistake, omission, or incorrect processing. On the other hand, even at each discharge source, since the treatment status at the treatment plant cannot be grasped, it is necessary to contact the waste liquid discharge adjustment management department or the like to obtain the adjustment and permission when discharging the waste liquid, and the procedure was extremely complicated.

More recently, in order to perform more efficient waste liquid treatment while maintaining a high degree of safety as a whole facility, in addition to the conventional waste liquid management, which kind of waste liquid is discharged from where and how much. The amount and amount of waste liquid that each type of waste liquid has is properly distributed according to the amount of waste discharged from each discharge source. How it fluctuates over time, how much charge is imposed on each emission source, and whether it is possible for each emission source to self-adjust by grasping the processing status of the processing site and the distribution status of empty containers in real time There is a growing demand for comprehensive distribution data regarding waste liquids such as, and the like, and their containers.

The present invention has been made to solve the above problems. Therefore, the object of the present invention is to accurately grasp the distribution state of the classified waste liquid and the container in a facility where a small amount of various kinds of waste liquid is discharged. However, it is another object of the present invention to provide an organized waste liquid treatment method and apparatus so that the discharge of the waste liquid can be self-adjusted even at the discharge source.

[0007]

[Means for Solving the Problems] The above-mentioned problem is solved when a waste container containing a waste liquid (hereinafter At least (A) container specific number (hereinafter referred to as "serial number"), (B) discharge source classification, and (C) treatment method classification of waste liquid (hereinafter referred to as "container") A barcode with (recorded simply as "classification") is given, each discharge source sorts various waste liquids into each container according to the classification recorded on this barcode, and the waste liquid container is placed in the treatment plant. At the processing site, the bar code recorded in the carried-in container is read at the processing site, input to the centralized management computer (hereinafter simply referred to as "computer") as receipt information, and the amount of waste liquid is measured and weighed. It is input to the computer as a report, and these pieces of information are combined and stored in the computer as storage information for each container.At the time of processing the waste liquid in each container, the bar code of the container to be processed is read again and used as preparation information. It is input to the computer, and this information is stored in the computer as container-based processing information in combination with the container-based storage information, and at least each discharge source and type are selected from the container-based storage information and container-based processing information. The problem can be solved by providing a waste liquid treatment method that creates waste liquid distribution data indicating the location and amount of the waste liquid.

[0008] In the above, regarding the container which has been emptied by treating the waste liquid at the processing site, the maintenance management is performed and at least a part of the container is sent to each discharge source, and the processing result is used as empty container processing information. Input to the computer, and based on this empty container treatment information, the above-mentioned container-based storage information, and container-based processing information, the location and empty /
It is preferable to create container distribution data indicating the filled state. Further, in the above, at least the generated waste liquid distribution data is transmitted to at least each waste liquid discharge source so that each waste liquid discharge source can perform self-adjustment regarding discharge of the waste liquid to the centralized treatment plant by referring to the data. It is preferable.

The present invention is also an apparatus for separating and treating various kinds of waste liquids discharged from a plurality of discharge sources according to a predetermined processing method in a processing plant, which is attached to a container for storing the waste liquids and has at least (A ) Read the barcode that records the serial number, (B) category of discharge source, and (C) classification, and the barcode recorded on the container that was installed at the processing site and that was loaded into the computer as receipt information. Receipt information input means, weighing value input means for weighing the waste liquid in this container and inputting the measured value to the computer as weighing information, and the bar code of the container to be processed at the time of processing the waste liquid in each container Again, and prepares the receipt information for each container from the purchase information input means for inputting to the computer as the purchase information, and the input receipt information and the measurement information,
The container-based processing information is created from the container-based storage information and the above-mentioned preparation information, and at least the location and amount of the waste liquid by each source and type is determined from the container-based storage information and the container-based processing information. There is provided a waste liquid treatment device having a computer for creating the waste liquid distribution data shown.

This waste liquid processing apparatus inputs empty container processing information to the computer as empty container processing information about processing results including maintenance management and sending to a discharge source of a container that has been emptied by processing waste liquid. The computer may have means for creating at least the location and empty / filled state of each container as container distribution data from the empty container processing information, the container-based storage information, and the container-based processing information. It is preferable that it is possible.

Further, this waste liquid treatment apparatus transmits at least the generated waste liquid distribution data to at least each discharge source, and each discharge source refers to the above data and performs self-adjustment regarding discharge of the waste liquid to the treatment site. It is preferable to have a data transmission means capable of performing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to an embodiment. This embodiment is a waste liquid treatment method for centralized waste liquid management in a certain university facility. In this university facility, the waste liquid discharged from each laboratory (source) is classified into nine types and processed. Has become. The classifications are flame-retardant organic waste liquid, halogen waste liquid, photographic waste liquid, cyan waste liquid, flammable organic waste liquid, waste oil, inorganic waste liquid (including heavy metals), inorganic mercury waste liquid, and fluorine waste liquid.

FIG. 1 shows this waste liquid treatment method and its information transmission path. In FIG. 1, thick lines indicate the flow of containers and thin lines indicate the flow of information. The container 1 used in this waste liquid treatment method is a so-called plastic can containing 20 liters, and the tag attached to the handle has a serial number (A),
A bar code 2 recording (B) discharge source classification and (C) classification is provided. Each discharger has a required amount of containers of the corresponding category according to the type and amount of the waste liquid discharged, and as shown by reference numeral 3, each time the waste liquid is generated,
This container 1 is sorted and put. The container 1 in which the waste liquid has reached a predetermined amount is carried into the processing site as indicated by reference numeral 4.

The bar code 2 of the container 1 containing the waste liquid carried into the reception at the processing site is read by the reader 5, and the bar code information, that is, (A) serial number, (B) discharge source classification and (C). ) The classification is input to the computer (not shown) as the receipt information 6 together with the read date and time. The container 1 is received at the processing site after the above-mentioned arrival information 6 is displayed on the reception desk and is confirmed to be collated with the actual product, and is treated as a receipt.

The weight of the contents of each of the stored containers 1 is measured by the weighing device 7, and the measured value is input to the computer as the measurement information 8. This weighing is preferably performed at the time of reception, but may be performed after the reception in some cases. The above arrival information 6
And the weighing information 8 are combined in the computer, and the discharge source, the classification, and the waste liquid amount of the serial numbered containers are stored as the container-based storage information 9.

The contents of each container 1 stored can be
Alternatively, it is stored in a container until it reaches a certain amount for each type, and then transferred to a charging tank for each type and introduced into the waste liquid treatment step 10. When the contents are introduced into the waste liquid treatment process 10, the barcode 2 of each container 1 is read again by the reading device 11 and input as the preparation information 12 into the computer. In this case, only the (A) serial number information of the bar code 2 is necessary because it suffices to know which container contents are introduced into the waste liquid treatment process 10.

The computer combines the preparation information 12, the processing date and time information, and the previously stored container-based storage information 9 to store as container-specific processing information 13 for each container, discharge destination, and type, and at the same time, specifies the specified information. In response to the waste liquid treatment step 10, an alarm is issued to prevent an erroneous operation when an erroneous category is to be charged into the charging tank or when the charged quantity exceeds the process capacity. In addition, the serial number of the container 1 to which the content is transferred here is registered as “empty container”. From the container-based storage information 9 and the container-based processing information 13, waste liquid distribution data 14 indicating the location and processing status of waste liquid by discharge source and type is created and output to necessary departments as necessary. .

The empty container 1 generated by the waste liquid treatment is inspected for damage, service life, etc., and usable ones are returned to the discharge source recorded in the bar code 2, or the bar code (B ) Change the classification code of the emission source and distribute it to different emission sources, discard the unusable ones,
If there is a shortage of containers, a new container with a new serial number bar code is introduced, and empty container maintenance 15 is performed. The processing result is input to the computer as empty container processing information 16.

The computer uses the empty container processing information 16
And the container-based storage information 9 and container-based processing information 13 described above.
With reference to, the container distribution data 17 indicating the location of the container and the empty / filled condition of the container according to the comprehensive discharge source and type in the facility is created and output to the necessary department as necessary.

The waste liquid distribution data 14 and the container distribution data 17 are transmitted by the data transmitting means 18 to the respective discharge sources and, if they exist, to the waste liquid shipping adjustment department. Usually, a so-called run (Local Area Network) of a bus type, a loop type, a star type, etc. is constructed by connecting computers and terminal devices of respective discharge sources. Therefore, by connecting to this system, the above data transmission means 18 can be formed.

At each discharge source, by referring to the waste liquid distribution data 14 and the container distribution data 17 in real time, it is possible to ascertain the processing condition of the classified waste liquid at the processing plant, the status of contraband, and the distribution status of empty containers. Then, the timing of carrying out the classified waste liquid to the treatment plant is adjusted by itself. If the data transmission means 18 is formed on the run, the respective discharge sources can communicate with each other to make mutual adjustments such as the discharge timing of waste liquid and the interchange of empty containers.

By the waste liquid treatment method and apparatus of the present invention according to the above-described embodiment, the waste liquid treatment process 10 in the treatment plant from each discharge source is performed in a necessary department including each discharge source.
Not only can the location of the waste liquid up to the type be immediately grasped, but misclassification, erroneous writing, omission, or mishandling of the type and quantity at the treatment plant can be prevented, and the maintenance and distribution status of empty containers can be accurately grasped. Therefore, the management of waste liquid in the facility is organized in the facility where a large amount of small amount of waste liquid is generated, and the self-adjustment is possible after grasping the overall flow of the waste liquid at each discharge source, and also for each discharge. Even if the type or quantity of the waste liquid originally varies, empty containers can always be properly distributed, and efficient waste liquid treatment can be performed.

In the above-described embodiment of the present invention, the waste liquid distribution data and the container distribution data are created and both of them are transmitted to the necessary departments including the discharge source. It is not limited to the form. Basically, the waste liquid treatment method of the present invention is to input a bar code recorded on at least (A) serial number, (B) discharge source, and (C) classification, which is given to each container 1, and for each container. The waste liquid distribution data is created from the input of the waste liquid amount. Even with this basic form,
It is possible to reduce the possibility of erroneous recognition, erroneous writing, omission and / or erroneous processing when confirming the classification of the waste liquid, and it is possible to prepare management data, statistical data, etc. regarding the waste liquid processing. Also, the classification of the waste liquid is not limited to the above, and the waste liquid can be appropriately classified according to the characteristics of the waste liquid discharged from each discharge source and the configuration of the waste liquid treatment facility.

In order to smoothly operate the waste liquid treatment method of the present invention, it is necessary to properly separate and put the waste liquid generated at each discharge source into a container of a predetermined classification. In order to prevent erroneous operation in this case, take measures such as clearly indicating a different name on the body of the container or a position that is easy to confirm, and posting a correspondence table between each waste liquid and classification in the container storage area. It is preferable.

If necessary, a handwritten slip may be attached to each container 1, and the date and time, the waste liquid type, the approximate amount, etc. may be entered in this handwritten slip each time the waste liquid is charged.
In this case, when the container 1 is brought into the processing plant, the receptionist checks the information from the barcode 2 against the contents of the handwritten slip, and confirms the contents by visual inspection or other simple inspection. If there is no mistake in the contents and the barcode information, the container 1 is accepted and stored. Thereby, when the classification of the contents is different from that recorded on the barcode 1, or when different classifications are mixed, it is possible to take appropriate processing as a processing site.

Next, the waste liquid treatment step 10 in the above embodiment will be described with reference to FIG. However, it goes without saying that the present invention is not intended only for the waste liquid treatment step shown in FIG. The waste liquid treatment step 10 of FIG. 2 is capable of treating waste liquids of different types in combination, and the main parts are a preparation tank for each sort treatment, that is, a flame-retardant organic waste liquid tank 21, a halogen-based waste liquid. Tank 22,
Photo waste liquid tank 23, cyan waste liquid tank 24, flammable organic waste liquid tank 25, waste oil tank 26, inorganic waste liquid tank 27, inorganic mercury waste liquid tank 28, fluorine waste liquid tank 29, combustion furnace 30, reaction can 31,
It is composed of a thickener 32 and a dehydrator 33. The inorganic mercury waste liquid tank 28 and the fluorine-based waste liquid tank 29 are respectively provided with pretreatment devices 34 and 35, the reaction can 31 is provided with an exhaust gas treatment device 36, and the thickener 32 is provided with a waste water treatment device 37.

The waste liquids classified into the respective types are roughly treated in the waste liquid treatment step 10 as follows. Flame-retardant organic waste liquid: Since this waste liquid contains a large amount of water and is often separated into two or more phases, it is introduced into the combustion furnace 30 after being emulsified by adding an emulsifier, if necessary, and burned and incinerated.

Halogen-based waste liquid: It is introduced into the combustion furnace 30 and burned and incinerated. Photo waste liquid: It is introduced into the combustion furnace 30 and burned and incinerated. Cyanic waste liquid: This waste liquid often contains blood test waste liquid and may contain blood, protein, etc. In this case, since a high temperature of 1000 ° C. or higher is required to decompose the C—N bond, the waste liquid is mixed with kerosene for auxiliary fuel, the calorie of the waste liquid is adjusted, and then the waste liquid is introduced into the combustion furnace 30 for combustion and incineration. To do.

Flammable organic waste liquid: It is introduced into the combustion furnace 30 and burned and incinerated. However, it is not incinerated at the same time as cyan waste liquid. Waste oil: Since this waste liquid has a high viscosity, it is mixed with a flammable organic waste liquid to reduce the viscosity and then burned or burned, or when burning a cyan waste liquid, it is mixed for calorie control as a substitute for kerosene and burned in a combustion furnace 30. Burn and incinerate.

Inorganic waste liquid: This waste liquid is a general inorganic waste liquid and contains heavy metals. This waste liquid is introduced into the reaction can 31 and subjected to ferrite treatment. That is, the waste liquid is heated to 70 ° C. or higher by using the exhaust gas heat of the combustion furnace 30, an appropriate amount of ferrous sulfate and sodium hydroxide is added to adjust the pH value to the alkaline side, and the heavy metal ions in the waste liquid are changed to iron ions. After binding, the reaction solution is introduced into the thickener 32 to precipitate the iron compound. The obtained precipitate is introduced into a dehydrator 33 and dehydrated to remove ferrite containing heavy metal ions as sludge.

Inorganic mercury waste liquid: introduced into the pretreatment device 34,
Add iron powder and perform adsorption treatment. After the pretreatment, the sludge is separated and the filtrate is treated together with the above-mentioned inorganic waste liquid. Fluorine-based waste liquid: introduced into the pretreatment device 35, slaked lime is added, and fluorine ions are converted into insoluble calcium fluoride. Next, the calcium fluoride is removed by the dehydrator 33, and the filtrate is treated together with the above-mentioned inorganic waste liquid.

Exhaust gas and waste water generated during the entire waste liquid treatment process 10 are finally treated by an exhaust gas treatment device 36 and a waste water treatment device 37, respectively, and then discharged or discharged.

[0033]

EFFECTS OF THE INVENTION The waste liquid treatment method and apparatus of the present invention is a container which is carried into a treatment site by providing a container with at least a (A) serial number, (B) a discharge source, and (C) a classification-recording bar code. The bar code is read, the amount of waste liquid is measured, the bar code is read again at the time of waste liquid treatment, and these data are input to the computer to create waste liquid distribution data for each discharge source and type. The location of the waste liquid from each discharge source to the waste liquid treatment process in the treatment plant can be immediately ascertained by type, which enables comprehensive and efficient waste liquid management. Also, misclassification, erroneous writing, omission of entry, or erroneous processing at the processing plant can be prevented.

In addition to the above, if the distribution information of the empty container is also input to the computer, the container distribution data is created.
Necessary departments can immediately and accurately grasp the whereabouts and empty / filled status of each container, and realize efficient container distribution. If these distribution data are transmitted to each discharge source, each discharge source will be able to carry out an appropriate amount by self-adjustment through the waste liquid discharge adjustment management department as needed, and the waste liquid management in the facility will be rationalized. It .

[Brief description of drawings]

FIG. 1 is an organization chart showing an embodiment of the present invention.

FIG. 2 is a process diagram showing a waste liquid treatment process in one embodiment of the present invention.

[Explanation of symbols]

 1 ... Waste liquid container 2 ... Bar code 5 ... Bar code reading device 7 ... Measuring instrument 11 ... Bar code reading device 14 ... Waste liquid distribution data 18 ... Data transmission means

Claims (6)

[Claims] 1. When the waste liquid discharged from a plurality of waste liquid discharge sources is sorted according to a processing method defined in a centralized treatment plant, at least the (A) transport container is unique to the transport container for storing the waste liquid. A barcode that records the number, (B) classification of the waste liquid discharge source, and (C) the classification of the waste liquid corresponding to the treatment method is given, and each waste liquid discharge source sorts various waste liquids according to the classification of the waste liquid recorded in this barcode. Sortedly put into each transport container, transport the waste liquid-loaded transport container to the centralized treatment plant, read the bar code recorded in the transported transport container at the centralized treatment plant, and use the centralized management computer as receipt information. In addition, the amount of waste liquid is measured and input as measurement information into the computer, and the information is combined to obtain the storage information for each container as described above. When the waste liquid in each transport container is processed, the bar code of the container to be processed is read again and input as preparation information into the computer, and this information is combined with the above-mentioned storage information for each container to process by container. A waste liquid processing method for storing the information as the information in the computer, and creating the waste liquid distribution data indicating the location and the amount of the waste liquid by each waste liquid discharge source and waste liquid type from the above-mentioned container-based storage information and container-based processing information. . 2. A transport container which has been emptied of waste liquid in a centralized processing plant is maintained and managed, and at least part of it is sent to each waste liquid discharge source, and the processing result is used as empty container processing information. The container distribution data indicating the location and empty / filled state of each transportation container is created from the empty container treatment information, the container-based storage information, and the container-based processing information. The waste liquid treatment method according to 1. 3. The generated at least waste liquid distribution data is transmitted to at least each waste liquid discharger so that each waste liquid discharger can perform self-adjustment regarding discharge of waste liquid to a centralized treatment plant by referring to the data. The waste liquid treatment method according to claim 1 or 2. 4. An apparatus for separating and treating various kinds of waste liquids discharged from a plurality of waste liquid discharge sources according to a processing method defined in a centralized treatment plant, which is attached to a transport container for storing the waste liquids and has at least (A )
A barcode that records the unique number of the transport container, (B) classification of the waste liquid discharge source, and (C) the classification of the waste liquid corresponding to the treatment method, and the above-mentioned recorded in the transport container that was installed at the centralized treatment plant The receipt information input means for reading the bar code and inputting it as receipt information to the centralized management computer, the weighing value input means for weighing the waste liquid in the transport container and inputting the weighing value as the weighing information to the computer, At the time of processing the waste liquid in the transport container, the barcode of the container to be processed is read again and the storage information by container is input from the input information input means for inputting to the computer as the input information and the input receipt information and weighing information. Create the container-based processing information from the container-based storage information and the above-mentioned preparation information, and at least discard each of the containers based on the container-based storage information and the container-based processing information. A waste liquid processing apparatus having a centralized management computer that creates waste liquid distribution data indicating the location and amount of waste liquid by liquid discharge source and waste liquid type. 5. An empty container process for inputting to a computer the processing result including emptying process information including maintenance management of the transport container that has been emptied of waste liquid at a centralized processing plant and sending to the waste liquid discharge source. An information input means, and a centralized management computer for creating at least the location and empty / filled state of each transport container as container distribution data from the empty container processing information, the container-based storage information, and the container-based processing information. The waste liquid treatment apparatus according to claim 4, further comprising: 6. The produced at least waste liquid distribution data is transmitted to at least each waste liquid discharger, and each waste liquid discharger refers to the data to perform self-adjustment regarding discharge of waste liquid to a centralized treatment plant. The waste liquid treatment apparatus according to claim 4 or 5, further comprising a data transmission means capable of performing the operation.