JPH11169451A - Medical waste water treatment agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently show the original water absorbing ability of an absorptive resin and to solidify contaminous medical waste water by means of a min. quantity by containing the absorptive resin having multiple hydrophilic radicals and a substance for reducing the ion strength of an electrolyte contained in the waste water and preventing its bonding to the hydrophilic radicals. SOLUTION: A medical waste water treatment agent is produced from the absorptive resin and the substance for reducing the ion strength of the electrolyte in the waste and preventing its bonding to the hydrophilic radicals. Therefore, water absorbing force of the absorptive resin is improved as compared with a medical waste water treatment agent only using a conventional absorptive resin and waste water is surely solidified by the small quantity of it. Then, the medical waste water treatment agent in which an absorptive agent 4 except the absorptive resin such as sand, bentonite, zeolite, sawdust, pulp or wastepaper or the like for example, is contained in a spherical and water-soluble capsule 5 as an auxiliary absorbing material in addition to the absorptive resin 1, a sterilizer 2 and a chelate agent 3 is used by properly throwing-in to the waste water whenever waste water is collected in a waste water collecting container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a medical waste liquid treating agent for safely disposing of medical waste liquid discharged by medical procedures such as surgery, childbirth, or analysis.

[0002]

2. Description of the Related Art Liquid medical effluent such as blood or amniotic fluid or urine or blood after examination discharged at the time of surgery or childbirth in hospitals is used to prevent infectious diseases for medical workers and waste disposal companies. The waste is collected in a disposable waste liquid container, and when a predetermined amount has been collected, the waste is incinerated by asking a medical waste trader, or the medical staff etc. in the facility discharge it to a septic tank. I have. However, when requesting disposal of waste by a medical waste trader, the trader must transport the waste liquid container containing the infectious waste liquid in a liquid state to the disposal site. May be damaged and the waste liquid may leak or scatter, infecting nearby people.In addition, when medical personnel discharge waste liquid into the septic tank, the discharged waste liquid may be scattered and infected. There is a problem that may be. As described above, it is very dangerous from the viewpoint of infectious diseases to dispose of medical waste liquid in a liquid state. Therefore, it is desired to dispose of the medical waste liquid after solidifying it. As a waste liquid treatment agent for solidifying medical waste liquid, a treatment agent comprising a water-absorbing resin having a high water absorbency and having a water retention property such that once absorbed water does not separate even if some pressure is applied thereto is disclosed in JP-A-4-122263. And Japanese Patent Application Laid-Open No. 6-216. The above-mentioned water-absorbent resin is a synthetic polymer that has the property of absorbing water and swelling instantly when it comes into contact with water and of making the whole water into a gel state. It has an original cross-linked structure, and its water absorption reaches several hundred times, and if it is high, it reaches several thousand times. The water absorbent resin configured as described above,
Because it will have a large number of hydrophilic groups, when it comes into contact with water, it will begin to dissolve in water and begin to spread, and will absorb water into the resin due to osmotic pressure caused by the ion concentration inside the resin being higher than outside water Go. Next, the negative ions of the hydrophilic group repel each other, further spreading is promoted and swelling, but since it has a three-dimensional cross-linked structure, if it spreads to some extent, it will not spread any more,
Spreading stops when the fishing net is spread, and at this time, water is trapped in each of the polymer stitches to generate water absorption and water retention.

[0003]

However, when a large number of hydrophilic groups contained in the water-absorbent resin come into contact with the electrolyte, they are bonded to the electrolyte. When solidification is attempted, when the electrolyte is contained in the waste liquid, the electrolyte is bonded to the hydrophilic group, and repulsion between the negative ions of the hydrophilic group does not occur. However, there was a drawback that it could not be obtained. In particular, in the case of bodily fluids such as urine and blood containing polyvalent ions such as Ca ²⁺ , there is also a problem that the resin causes an agglutination reaction due to these polyvalent ions, thereby significantly reducing water absorption. As described above, if sufficient water absorbing power is not obtained with the water absorbent resin, there is a problem that a part of the infectious waste liquid may remain in a liquid state, and the initial purpose cannot be achieved satisfactorily. In addition, there is a problem that it is uneconomical to increase the amount of the water-absorbing resin to solve this. The present invention solves the conventional problems described above, can sufficiently exhibit the original water absorbing ability of the water-absorbent resin, and can solidify infectious medical waste liquid in a minimum amount. It is intended to provide a medical waste liquid treating agent.

[0004]

Means for Solving the Problems In order to achieve the above object, a medical waste liquid treating agent according to the present invention comprises a water absorbent resin having a large number of hydrophilic groups and an ionic strength of an electrolyte contained in the waste liquid. And a substance for preventing the binding to the hydrophilic group. In addition, the medical waste liquid treatment agent can contain a germicide, and when a chlorine-based germicide is used as the germicide, further generation of chlorine gas can be prevented, and generation of chlorine gas can be prevented. Adjustment to a pH with a high bactericidal effect can be included in the range.
Preferably, the water-absorbing resin is 2 to 1 liter of waste liquid.
The germicide may be contained in a proportion of 1 gram or more per liter of waste liquid. More preferably, the medical waste liquid treating agent can be housed in a packaging container at least partially composed of a water-soluble material or a water-disintegrable material, and the packaging container is partitioned into a plurality of chambers in a longitudinal direction. It has a rod shape, and at least a part of a portion corresponding to each chamber may be formed of a water-soluble material or a water-disintegrable material. Further, the medical treatment agent may be contained in a packaging container having a release section sealed with a water-soluble material, and the packaging container has a rod-like form partitioned into a plurality of chambers in a longitudinal direction. In that case, at least each chamber may be provided with a discharge unit.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The water-absorbing resin contained in the medical waste liquid treating agent according to the present invention is roughly classified into three types, starch-based, cellulose-based and synthetic high-molecular-weight based on their composition. Are starch-acrylonitrile graft copolymer, starch-acrylic acid graft copolymer, starch-vinyl sulfonic acid graft copolymer,
Or, a starch-styrene sulfonic acid graft copolymer may be mentioned, and as the cellulose type, a cellulose-acrylonitrile graft copolymer, a cellulose-styrene sulfonic acid graft copolymer, or a carboxymethyl cellulose cross-linked polymer may be mentioned. In addition, synthetic polymer systems are roughly classified into acrylic, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, and others from the composition thereof.
A polyacrylonitrile-based polymer or a polyacrylate cross-linked polymer is mentioned, and as the polyvinyl alcohol-based, a polyvinyl alcohol cross-linked polymer or an acryl-
Examples include vinyl acetate copolymers, examples of polyethylene oxide include a polyethylene glycol diacrylate crosslinked polymer, examples of polyvinylpyrrolidone include a polyvinylpyrrolidone crosslinked polymer, and do not belong to the above classification. Examples thereof include polymers having a structure such as a hydroxyl group, a carboxyl group, a carboxylate, or a sulfonic acid group. Further, as the substance for reducing the ionic strength of the electrolyte in the waste liquid contained in the medical waste liquid treating agent according to the present invention and preventing the bonding with the hydrophilic group, Ca ²⁺ contained in the medical waste liquid and A chelating agent such as EDTA (ethylenediaminetetraacetic acid) for chelating Mg ²⁺ , and a precipitant which binds to and precipitates with an ion exchange resin, an ion sensitive substance, or an electrolyte. Reacts extensively with the electrolyte contained in medical wastewater to reduce the ionic strength of the electrolyte, and when using ion-exchange resins or ion-sensitive substances, it can also remove halogen ions contained in medical wastewater Further, the precipitant is more effective than the chelating agent if used for each component of the electrolyte. The chelating agent may be based on a coordination structure with a metal ion, such as N, O-coordination type, O, O-coordination type, N, S-coordination type, and S, S-coordination type.
Although it can be classified into a coordination type, it is not particularly limited as long as it has a certain degree of water solubility according to the electrolyte concentration of the medical waste liquid to be treated, and any of these chelating agents is used. Thus, these chelating agents can also be used in the form of a suitable salt. Among these chelating agents, N, O-coordination type chelating agents, for which complexans, rutalein complexones, and oxines are known, can be mentioned as particularly preferred chelating agents. More preferably, among the N, O-coordinating type chelating agents, complexans containing EDTA are mentioned as good chelating agents. Specific examples of the chelating agents for the complexans include 1,2-cyclohexanediaminetetraacetic acid (CyDTA), glycol etherdiaminetetraacetic acid (GEDTA), hexamethylenediaminetetraacetic acid (HDDTA), and imino diacetic acid (IDA). ), Hydroxyethyliminodiacetic acid (HIDA), 1,3-diaminopropan-2-oltetraacetic acid (DPTA-OH), diethylenetriaminepentaacetic acid (DTPA), ethylenediamine2
Acetic acid (EDDA), ethylenediamine diacetic acid 2-propionic acid (EDDP), ethylene bis (oxyethylene nitrilo) tetraacetic acid (EGTA, also called glycol ether diamine tetraacetic acid), ethylenediamine-tetrakis (methylenephosphonic acid) (EDTPO), ethylenediamine 2-propionic acid (EDDP), hydroxyethylethylenediamine triacetic acid (EDTA-OH), N- (2
-Hydroxylethyl) ethylenediamine triacetic acid (HE
EDTA), nitrilotriacetic acid (NTA), nitrilotripropionic acid (NTP), nitrilotris (methylenephosphonic acid), 2 (hydroxyethyl) glycine (NTP
O), 1,2-diaminopropanetetraacetic acid (Methyl
-EDTA) and the like, and among these chelating agents, EDTA, CyDTA, and salts thereof are particularly preferable.

[0006] As described above, by producing a medical waste liquid treating agent from a water absorbing resin and a substance that lowers the ionic strength of the electrolyte in the waste liquid and prevents the binding to the hydrophilic group, the conventional water absorbing resin is produced. As compared with a medical waste liquid treating agent consisting of only the above, the water absorbing power of the water absorbent resin is improved, and the waste liquid can be surely solidified with a small amount. The following data shows that, in an aqueous solution actually containing an electrolyte, a medical waste liquid treating agent consisting of only a water-absorbent resin, and a bond between the water-absorbent resin and the hydrophilic group by reducing the ionic strength of the electrolyte in the waste liquid. It is an experimental result in which a medical waste liquid treating agent containing a substance to be prevented was added, and the water absorbing ability of both medical waste liquid treating agents was measured. In this experiment, Aquakeep SA-60S manufactured by Sumitomo Seika Co., Ltd. was used as the superabsorbent polymer, and a calcium chloride concentration of 20 mm was used as the aqueous solution containing the electrolyte.
ol / l, 30 mmol / l, and 50 mmol / l aqueous solutions of calcium chloride, sodium oxalate is used as a substance for reducing the ionic strength of the electrolyte in the waste liquid and preventing the electrolyte from binding to the hydrophilic group. In 100 ml of each calcium chloride solution using a precipitant consisting of
g of Aquakeep SA-60S (highly water-absorbing polymer) alone and 1 g of Aquakeep SA-60S
(Highly water-absorbing polymer)
The treating agent B to which 1 / l of sodium oxalate (precipitating agent) was added was added, and the water absorbing ability of each superabsorbent polymer was measured. (Experimental results) Calcium chloride concentration 20mmol / l 30mmol / l 50mmol / l Treatment agent A (water absorption capacity) 85ml 65ml 40ml Treatment agent B (water absorption ability) 100ml 100ml 60ml Also from this experiment result, water absorbent resin and waste liquid By generating a medical waste liquid treating agent from a substance that lowers the ionic strength of the electrolyte in the electrolyte and prevents the bonding with the hydrophilic group, the water absorbing resin is compared with a medical waste liquid treating agent consisting only of a water absorbent resin. It can be seen that the water absorption capacity has been significantly improved.

When the medical waste liquid treating agent according to the present invention contains a bactericide, an aldehyde-based germicidal agent such as glutaraldehyde is effective as a bactericide at a content of 2 WT / V% against HIV and HCV viruses. Agent, effective chlorine concentration 1000
Calcium hypochlorite (main component of bleached powder), chlorine-based disinfectant such as sodium dichloroisocyanurate or sodium hypochlorite, and ortho-phenylphenol sodium, etc., which are effective against HIV and HCV virus at the ppm amount added Phenol-based germicides, iodine-based germicides such as TRIOSYN (trade name) manufactured by Kitasato Pharmaceutical, paraform and formalin tablets, and the like. As the disinfectant, a solid disinfectant can be preferably used because it is easy to use, but a liquid disinfectant may be used. still,
In the above example, all except for sodium hypochlorite are solid germicides. Further, among the above examples, sodium dichloroisocyanurate has an effect of having a high bactericidal effect even in the presence of an organic substance, and calcium hypochlorite has an effect of being easily available and inexpensive. Furthermore, when using a chlorine-based disinfectant as a disinfectant,
It is possible to prevent the disinfectant from reacting with the acidic waste liquid to generate chlorine gas, and furthermore, a pH having a high germicidal effect (for example, pH 6 to pH 8) as long as the generation of chlorine gas can be prevented.
In order to adjust to 5), an alkaline pH adjuster, for example, barium hydroxide or the like may be contained in the medical wastewater treatment agent. The barium hydroxide is advantageous in that barium ions easily form a precipitate, so that a decrease in water absorption by cations does not occur. It is also conceivable to add a deodorant or a fragrance in addition to the above. Furthermore, as a packaging container for the medical waste liquid treatment agent, when using a water-soluble material so that the packaging container itself can be dissolved in the waste water to release the water-absorbing resin and the like into the waste liquid, for example,
Oblate-like starch, gelatin used in drug capsules and the like can be used. In addition, when using a water-disintegrable resin as a packaging container for a medical waste liquid treatment agent, for example, a water-disintegratable nonwoven fabric or a water-disintegrable paper in which fibers are bonded to each other with a water-soluble adhesive may be used, As the water-soluble adhesive, a polyvinyl alcohol-based adhesive or the like can be used. Furthermore, the whole packaging container may be formed of a water-soluble material or a water-disintegrable material, but only a part thereof may be formed of these materials. It may be formed, and a part of the outlet is sealed with a water-soluble adhesive, and the other part may be formed of a water-insoluble material. If the medical waste liquid treatment agent is sealed in the packaging container as described above, the entire packaging container can be put into the waste liquid, but, for example, only the contents of the medical waste liquid treatment agent are put into the waste liquid without being put into the waste liquid. Packaging containers in the form of a charge can also be considered.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the medical waste liquid treating agent according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a water absorbing agent other than the water absorbing resin such as sand, pentonite, zeolite, sawdust, pulp, paper waste, etc., in addition to the water absorbing resin 1, the bactericide 2, and the chelating agent 3, as well as auxiliary water absorbing materials. 4 is a medical waste liquid treating agent containing 4 in a spherical water-soluble capsule 5. The medical waste liquid treating agent configured as described above can be used so as to be appropriately introduced into the appropriate number of waste liquids every time the waste liquid is collected in the waste liquid collection container. FIG. 2 shows a medical waste liquid treating agent in which a water absorbing resin, a bactericide, a chelating agent and, if necessary, an auxiliary water absorbing material are accommodated in each chamber 10 of a rod-shaped packaging container 11 partitioned into a plurality of chambers 10. In the packaging container 11, a part of a portion corresponding to each chamber is made of a water-soluble material or a water-disintegrable material. The medical waste liquid treating agent thus configured is used by standing inside the waste liquid collecting container 12 as shown in FIG. By forming the packaging container into a rod shape and partitioning the interior into a plurality of chambers 10 as described above, when the waste liquid is introduced into the waste liquid recovery container 12, the waste liquid treating agent in the lower chamber is used one after another. Become.
FIG. 3 also shows an example in which the packaging container 21 is partitioned into a plurality of chambers 20. The packaging container 21 contains, for example, a chelating agent and a bactericide and a water-absorbing resin alternately.
By alternately containing the chelating agent and the water-absorbing resin in this manner, the chelating agent is released into the waste liquid prior to the water-absorbing resin, and chelates Ca ²⁺ and Mg ²⁺ in the waste liquid. The water absorbing power of the water-soluble resin is higher.

[0009]

As described above, the medical waste liquid treating agent according to the present invention reduces the ionic strength of the water-absorbent resin having a large number of hydrophilic groups and the electrolyte contained in the waste liquid, and reduces the hydrophilic group. The substance contained in the waste liquid does not combine with the hydrophilic group of the water-absorbent resin to reduce the water-absorbing power of the water-absorbent resin. The power can be exerted efficiently, and the medical waste liquid can be solidified reliably with a minimum amount of the water-absorbing resin. This eliminates the problem that a part of the waste liquid remains in a liquid state due to lack of water absorption power, and eliminates the possibility of infection due to scattering of the waste liquid, etc., and as a treatment agent for treating medical waste liquid that may have an infectious disease. Is optimal. In addition, since it is not necessary to use the water absorbent resin more than necessary, it is economically effective. In addition, if the above-mentioned medical waste liquid treating agent contains a bactericide, it can sterilize the dangerous virus itself in the waste liquid at the time of solidification treatment, so that handling during treatment such as incineration after solidification becomes safe. . When a chlorine-based disinfectant is used as the disinfectant, the acid waste liquid and the chlorine-based disinfectant are prevented from reacting with each other to generate chlorine gas by further containing a pH adjuster. Furthermore, when the medical waste liquid treating agent is formed by packaging with a water-soluble material or a water-disintegrating material, there is no need to measure the amount of the medical waste liquid treating agent when put into the waste liquid, so that it can be used easily. become.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a medical waste liquid treating agent according to the present invention.

FIG. 2 is a view showing a second embodiment of the medical waste liquid treating agent according to the present invention.

FIG. 3 is a view showing a third embodiment of the medical waste liquid treating agent according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water-absorbing resin 2 Disinfectant 3 Chelating agent 4 Auxiliary water-absorbing material 10, 20 Cell compartment 11, 21 Packaging container

Claims (9)

[Claims] 1. A medical system comprising: a water-absorbing resin having a large number of hydrophilic groups; and a substance that reduces the ionic strength of an electrolyte contained in a waste liquid and prevents the electrolyte from binding to the hydrophilic groups. Waste liquid treatment agent. 2. The medical waste liquid treating agent according to claim 1, further comprising a bactericide. 3. The method according to claim 2, further comprising a pH adjuster for adjusting the pH to a high sterilizing effect within a range capable of preventing generation of chlorine gas and preventing generation of chlorine gas. Medical waste liquid treatment agent. 4. The medical waste liquid treating agent according to claim 1, wherein the water-absorbent resin is contained at a rate of 20 g or more per liter of waste liquid. 5. The method according to claim 1, wherein the disinfectant is used in an amount of 1 / liter of waste liquid.
The medical waste liquid treating agent according to any one of claims 1 to 4, wherein the agent is contained in a ratio of not less than gram. 6. The medical treatment according to claim 1, wherein the treatment agent is contained in a packaging container at least partially composed of a water-soluble material or a water-disintegrable material. Waste liquid treatment agent. 7. The packaging container according to claim 1, wherein the packaging container has a rod-like shape partitioned into a plurality of chambers in a longitudinal direction, and at least a part of a portion corresponding to each chamber is made of a water-soluble material or a water-disintegrable material. The medical waste liquid treating agent according to claim 6, characterized in that: 8. The medical waste liquid treatment agent according to claim 1, wherein the treatment agent is contained in a packaging container having a release portion sealed with a water-soluble material. . 9. The medical device according to claim 8, wherein the packaging container has a rod-like shape partitioned into a plurality of chambers in a longitudinal direction, and has a discharge portion at least in each of the chambers. Waste liquid treatment agent.