JP2004113890A - Waste water sterilizing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste water sterilizing system of a simple constitution which can be easily introduced even into a small-scaled plant or the like. <P>SOLUTION: The waste water sterilizing system is provided with a sterilizing tank 11 which stores waste water after washing a utensil such as an animal rearing cage 1, an agitation means 13 for agitating the waste water in the sterilizing tank, a charging means 17 for charging a disinfectant into the waste water in the sterilizing tank and a drainage means 19 for discharging sterilized waste water in the sterilizing tank outside. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wastewater disinfection system for disinfecting and draining wastewater after cleaning equipment such as animal breeding cages.
[0002]
[Prior art]
For example, in breeding facilities that breed experimental animals such as rabbits, guinea pigs, mice, rats, etc., and animal experimental facilities that perform pharmacological experiments using such experimental animals, etc., a large number of breeding cages that accommodate experimental animals are installed in a multi-stage manner. Breeding stands are used. The breeding stand is provided with a waste container for receiving waste such as manure, directly below the breeding cage, and furthermore, because it is necessary to maintain a sanitary condition, a washing device for treating the waste in the waste container is installed. (For example, see Patent Document 1).
[0003]
In a conventional facility, it is common to treat wastewater after washing equipment such as breeding cages in a wastewater treatment facility using, for example, activated sludge, and then discharge the wastewater to the outside.
[0004]
[Patent Document 1]
Registered Utility Model No. 3030686
[Problems to be solved by the invention]
However, in conventional wastewater treatment facilities, the scale becomes large, so it is possible to introduce them in large-scale animal breeding facilities or experimental facilities, but small and medium-sized animal breeding facilities, experimental facilities, or animal hospitals. Its introduction is difficult in small facilities. If wastewater is drained to the outside without performing such wastewater treatment, various pathogens may be discharged, and it is desired to realize a simple wastewater disinfection system for disinfecting and discharging these pathogens.
[0006]
Therefore, an object of the present invention is to provide a wastewater disinfection system having a simple configuration that can be easily introduced even in a small-scale facility or the like.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, a disinfecting tank for storing waste water after washing the equipment such as an animal breeding cage, a stirring means for stirring the waste water in the disinfecting tank, and a disinfectant are injected into the waste water in the disinfecting tank. It is characterized by comprising a charging means and a drainage means for draining the sterilized wastewater in the sterilization tank to the outside.
[0008]
The invention according to claim 2 includes a sink for washing equipment such as an animal breeding cage, a collection tank for collecting wastewater flowing out of the sink, a disinfection tank for storing wastewater from the collection tank, It is provided with stirring means for stirring wastewater in the disinfecting tank, charging means for charging a disinfectant into the wastewater in the disinfecting tank, and drainage means for discharging the disinfected wastewater in the disinfecting tank to the outside. Features.
[0009]
According to a third aspect of the present invention, in the second aspect, a pump for pumping waste water in the collection tank to a disinfection tank is provided.
[0010]
According to a fourth aspect of the present invention, in the first aspect, the disinfecting tank is sealed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0012]
In FIG. 1, reference numeral 1 indicates a device such as an animal breeding cage. When animals such as rabbits, guinea pigs, mice, and rats are bred, for example, coats, feces and urine, or uroliths generated in urine adhere to the breeding cage 1.
[0013]
In order to wash them, the rearing cage 1 is placed on, for example, a sink 3 and washed with tap water from a faucet 5. However, an urine stone adhesion inhibitor such as Lumicoat R (registered trademark) may be added to the washing water.
[0014]
A collection tank 7 is disposed below the sink 3, and the wastewater collected via the sink 3 is collected in the collection tank 7. A pump 9 is provided in the collection tank 7, and the wastewater is pumped by the pump 9 and stored in the disinfection tank 11. Since the pump 9 only needs to be thrown into the collection tank 7 when using the present system, the present system can be retrofitted to existing equipment including the collection tank 7.
[0015]
The disinfecting tank 11 includes a lid 11A, and the inside of the disinfecting tank 11 is sealed by the lid 11A. The disinfecting tank 11 is provided with stirring means 13. The motor 13A of the stirring means 13 is attached to the lid 11A, and the stirring rod 13B enters wastewater in the disinfection tank 11. Reference numeral 15 denotes a water level sensor, which detects the water level in four stages.
[0016]
Disinfectant input means 17 for inputting an antiseptic into wastewater in the disinfecting tank 11 is provided. The charging means 17 includes a chemical solution tank 17A storing a chemical solution, and a chemical solution pump 17B for pumping the chemical solution in the tank 17A into the disinfecting tank 11. Further, there is provided drainage means 19 for draining the sterilized wastewater in the disinfection tank 11 to the outside, and the drainage means 19 is provided with an electromagnetic valve 19A.
[0017]
As the disinfectant, for example, glutaraldehyde, ethyl alcohol, isopropyl alcohol, sodium hypochlorite, popidone iodine, phenol, cresol, benzalkonium chloride, benzethonium chloride, or a chemical solution such as chlorhexidine. used.
[0018]
By the way, in small-scale facilities such as small- and medium-scale animal facilities and animal hospitals, the sink 3 and the collection tank 7 are generally installed as existing facilities.
[0019]
Therefore, if the pump 9 to be fed into the collection tank 7, the disinfecting tank 11, the disinfectant charging means 17 and the like are installed, the present wastewater disinfection system can be easily introduced using the above-mentioned existing facilities. .
[0020]
Next, the operation of the present system will be described.
[0021]
When the breeding cage 1 is washed, the waste water is collected through the sink 3 and collected in the collection tank 7. A pump 9 is set in the collection tank 7. When the pump 9 is driven, the pumped wastewater is stored in the disinfection tank 11. The operation of the pump 9 is stopped when the water level sensor 15 detects the set water level.
[0022]
When the water level sensor 15 detects the set water level, the chemical pump 17B is driven for a predetermined time set by a timer (not shown), and the chemical in the chemical tank 17A is pumped into the disinfection tank 11. The concentration of the disinfectant in the disinfecting tank 11 is controlled by a timer. In the case of glutaraldehyde, the concentration of the disinfectant is reduced to, for example, 2% or less. Here, when the amount of waste water in the disinfecting tank 11 is 1 ton, the amount of the chemical is approximately 20 liters.
[0023]
The chemical solution in the chemical solution tank 17A is fed into the disinfection tank 11 under pressure, and at the same time, the wastewater in the disinfection tank 11 is stirred by the stirring means 13. Then, after a lapse of a predetermined time, the electromagnetic valve 19A is opened, and the sterilized wastewater in the sterilization tank 11 is drained to the outside via the drainage means 19.
[0024]
The reason why the wastewater in the disinfecting tank 11 is stirred is to sufficiently mix the chemical solution and the wastewater. The stirring time in this case, that is, the time from the introduction of the chemical solution to the drainage is set to, for example, 30 minutes or more. If the time is less than 30 minutes, a sufficient disinfection effect cannot be obtained. The present chemical solution is adjusted to, for example, pH 7.5 to 8.5, and the sterilized wastewater is neutralized to pH 5.0 to 9.0 and drained to the outside. When the chemical solution is glutaraldehyde, if it is vaporized, there is a concern that it may affect the human body. Therefore, the disinfection tank 11 and the chemical solution tank 17A are almost completely sealed.
[0025]
In the above configuration, wastewater disinfection can be performed very easily using existing facilities such as sinks, not only in large-scale animal breeding and experimental facilities, but also in small and medium-sized facilities, especially small facilities such as animal hospitals. Can be.
[0026]
As described above, the present invention has been described based on one embodiment, but it is apparent that the present invention is not limited to this.
[0027]
For example, the wastewater from the sink 3 may be directly introduced into the disinfection tank 11 without installing the collection tank 7. With such a configuration, not only the collection tank 7 but also the pump 9 is not required, and furthermore, the control thereof is not required, and the equipment cost can be greatly reduced.
[0028]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the wastewater disinfection system of a simple structure which is easy to introduce | transduce even small-scale facilities etc. is provided.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing one embodiment of a wastewater disinfection system according to the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 animal breeding cage 3 sink 7 collection tank 9 pumping pump 11 disinfection tank 13 stirring means 15 water level sensor 17 disinfectant charging means 19 drainage means

Claims (4)

A disinfecting tank for storing waste water after washing of equipment such as animal breeding cages, a stirring means for stirring the waste water in the disinfecting tank, a charging means for charging a disinfectant to the waste water in the disinfecting tank, And a drainage means for draining the sterilized wastewater to the outside. A sink for cleaning equipment such as animal breeding cages, a collection tank for collecting wastewater flowing out of the sink, a disinfecting tank for storing wastewater from the collection tank, and stirring the wastewater in the disinfecting tank. A wastewater disinfection system comprising: stirring means; charging means for charging a disinfectant into wastewater in the disinfecting tank; and drainage means for draining sterilized wastewater in the disinfecting tank to the outside. The wastewater disinfection system according to claim 2, further comprising a pump for pumping wastewater in the collection tank to a disinfection tank. The wastewater disinfection system according to any one of claims 1 to 3, wherein the disinfection tank is sealed.

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