JP2002086137A - Floor cleaning waste liquid treatment agent, floor cleaning waste liquid treatment method, and floor cleaning waste liquid recycling method - Google Patents

Abstract

[PROBLEMS] A floor cleaning waste liquid treating agent and a floor cleaning waste liquid treatment method which can easily treat floor cleaning waste liquid and reduce the amount of liquid after treatment, while reducing the load on the environment. And a method for reusing floor cleaning waste liquid. SOLUTION: The floor washing waste liquid treating agent of the present invention contains a coagulant and a carbon dioxide gas generator comprising a carbonate and an acid. Then, when the cleaning waste liquid treating agent of the present invention is added to the floor cleaning waste liquid, the carbon dioxide gas bubbles generated from the carbon dioxide gas generator adhere to the surface of the flocculated particles, so that the flocculated particles float, so that even with a simple apparatus. Agglomerates in the floor washing waste liquid can be efficiently removed, the pH, the BOD value and the COD value can be reduced, the appearance can be clarified, and the waste water can be easily disposed without causing water pollution. Further, even if the floor cleaning waste liquid after the treatment is mixed with the cleaning liquid and used again as the mixed cleaning liquid, the cleaning property (wax removal property) does not decrease.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor cleaning waste liquid treating agent, a method for treating floor cleaning waste liquid, and a method for recycling floor cleaning waste liquid, and more particularly, to floor cleaning waste liquid such as peeling cleaning waste liquid generated by floor cleaning. Cleaning agent, floor cleaning waste liquid treatment method, and floor cleaning waste liquid that can be easily treated while reducing the load on the environment while reducing the burden on the environment. About the method.

[0002]

2. Description of the Related Art In places where a large number of people enter and exit, such as buildings and convenience stores, the floor is heavily soiled by shoes and heel marks caused by walking shoes. Therefore, in order to protect the floor and maintain a clean state, in addition to performing regular cleaning, the floor has been washed and then used as a flooring material such as elastic flooring, hard flooring, wooden floor, carpet, etc. At the same time, the floor maintenance agent is applied to the floor. Above all, floor maintenance agents generally used have the property of forming a dry film that can be easily removed by a physicochemical method, and floor maintenance agents having such properties are referred to as floor polish. Called.

[0003] Such floor polish is usually obtained by emulsifying or dissolving waxes, waxy substances, natural and synthetic resins and the like in water, and when applied to a floor, forms a film by drying to protect the floor material. It makes it difficult to adhere dirt such as dust and heel marks. Then, when cleaning becomes necessary due to the accumulation of dirt and the deterioration of the floor polish film, the floor polish film is usually cleaned and removed using an alkaline detergent, and then a new floor polish is prepared. Apply a polish to protect the floor. Separation washing waste liquid generated when cleaning and stripping floor polish is drained in accordance with the Sewerage Law in areas where sewerage is installed, and in accordance with the Water Pollution Control Act in areas where there is no sewerage law. There is a need.

However, in general, these stripping and cleaning waste liquids are p
H is alkaline, BOD value and COD value are high,
Further, since the wax component, the resin component, and the like are dispersed and turbid, if the water is drained as it is, remarkable water pollution is caused and a great load is imposed on the environment. Therefore,
It cannot be disposed of as it is, and is treated by diluting it with a large amount of water and draining it, or collecting it and entrusting it to an industrial waste disposal company. In particular, the wax component and the resin component in the stripping / cleaning waste liquid make the appearance of the liquid opaque, making the drainage treatment difficult, and increase the BOD value and COD value.
To cause water pollution due to odor, dirt, etc.
It is necessary to remove and separate as much as possible. For this purpose, sedimentation, filtration, centrifugation, separation techniques such as aggregation are adopted,
Since these wax components and resin components are finely dispersed or emulsified in the waste liquid, it is difficult to separate them by physical methods such as sedimentation and centrifugation. Although removal by filtration is effective for removing relatively large to medium particles, it is not practical because there is a problem that fine particles cannot be captured and clogging takes a long time. .

[0005] In order to remove the wax component and the resin component in these stripping / cleaning waste liquids, the most commonly used method in the past is a method of coagulating and removing using a coagulant.
In order to increase the coagulation efficiency, it is necessary to increase the amount of the coagulant used. However, many coagulants include metal atoms such as iron and aluminum, or low molecular weight substances that increase the BOD value and COD value. Therefore, the use of a large amount of a coagulant is not good for the environment, and there is a problem that it is difficult to treat the coagulated material after removal. Also,
In order to sufficiently mix the waste liquid with the flocculant or to increase the generated flocculant to the extent that it can be separated, there is a problem that a certain level of wastewater treatment equipment is required. Therefore, conventionally, there has been a demand for the development of a method for treating a floor cleaning waste liquid which is simple in terms of facilities, low in cost and low in environmental load.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is intended to reduce the load on the environment by providing floor cleaning waste liquid such as peeling cleaning waste liquid generated by floor cleaning while reducing the load on the environment. It is an object of the present invention to provide a floor cleaning waste liquid treating agent, a floor cleaning waste liquid treatment method, and a floor cleaning waste liquid reusing method that can be treated and enable reuse of a liquid part after the treatment.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies focusing on the aggregation phenomenon of fine particles due to foaming using carbon dioxide gas. As a result, the present inventors have found that a coagulant and a carbon dioxide gas generator are used in combination. The present inventors have found that the wax component, the resin component, and the like in the stripping / cleaning waste liquid can be easily agglomerated and easily separated / removed, thereby completing the present invention.

[0008] The floor cleaning waste liquid treating agent according to the first aspect of the present invention is characterized by containing a coagulant and a carbon dioxide generator. The “flocculant” constituting the floor cleaning waste liquid treating agent according to the first aspect of the present invention is one that can promote flocculation of particles dispersed in the suspension to form flocs. There is no limit. Such coagulants generally include inorganic coagulants and organic coagulants.

Specific examples of the inorganic coagulant include aluminum salts (aluminum sulfate, polyaluminum chloride, sodium aluminate, etc.), iron salts (ferric sulfate, ferric chloride, ferrous sulfate, etc.), And bentonite. Examples of the organic coagulant include anionic polymers (sodium acrylate / acrylamide copolymer, sodium alginate, sodium salt of CMC, sodium polyacrylate, maleic acid copolymer, etc.), and cationic polymers (polyethyleneimine). , Dialkylaminoethyl (meth) acrylates, quaternary ammonium salts, polyvinylpyridines, polythioureas, water-soluble aniline resins, etc.), and nonionic polymers (polyacrylamide, polyoxyethylene, caustic starch, etc.), etc. Is mentioned. Since particles in the floor washing waste liquid are often anionic, a cationic coagulant is preferable as the organic coagulant. These can be used alone or in combination of two or more. For example, the inorganic coagulants may be used alone or in combination of two or more. The organic coagulant can be used alone, but usually, especially in the case of an anionic coagulant, it is used in combination with an inorganic coagulant.

[0010] The content of the above-mentioned "coagulant" in the floor washing waste liquid treating agent of the first aspect of the present invention is not particularly limited. However, when an inorganic coagulant is used, it is usually 5 to 95 wt% in terms of solids. %, Preferably 10 to 80% by weight, more preferably 15 to 60% by weight, most preferably 15 to 50% by weight.
% By weight. If the content is less than 5% by weight, a sufficient coagulation effect may not be achieved. As a result, untreated wax and resin components may remain. This is because as a result of the relatively small amount of the agent, floc agglomeration due to foaming becomes insufficient, and untreated wax and resin components may remain, which is not preferable. When an organic coagulant is used, the amount is 0.2 to 90% by weight, preferably 0.3 to 70% by weight, more preferably 0.5 to 50% by weight, and most preferably 1 to 30% by weight. . If the content is 0.2% by weight or less, a sufficient coagulation effect may not be achieved. If the content exceeds 90% by weight, the low molecular weight substance in the organic coagulant dissolves in the floor washing waste liquid and B
This is because the OD value and the COD value may be increased, which is not preferable.

The “carbon dioxide generator” constituting the floor cleaning waste liquid treating agent of the first aspect of the present invention is not particularly limited as long as it generates carbon dioxide by a reaction.
In particular, as shown in the invention according to claim 2, carbonate and / or
Alternatively, a combination of a bicarbonate and an acid is preferable because bubbles of carbon dioxide gas can be efficiently generated. Examples of the above “carbonate” include sodium carbonate, sodium sesquicarbonate, potassium carbonate, ammonium carbonate, magnesium carbonate, calcium carbonate and the like. Also,
Examples of the “bicarbonate” include sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and the like. Further, as the above-mentioned “acid”, any of an organic acid and an inorganic acid can be used, but a water-soluble and solid acid is preferable. Examples of the organic acid include succinic acid, fumaric acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, dicarponic acid such as sebacic acid, citric acid, tartaric acid,
Oxy acids such as lactic acid, malic acid, and ascorbic acid; acidic amino acids such as glutamic acid and aspartic acid; and acidic salts of these organic acids. In addition, examples of the inorganic acid include silicic anhydride, boric acid, and the like. These can be used alone or in combination of two or more.

The content of the above-mentioned "carbon dioxide generator" in the floor cleaning waste liquid treating agent of each of the first and second aspects of the present invention is not particularly limited, but is usually 5 to 95% by weight in terms of solid content, preferably. Is 20-90% by weight, more preferably 4%
0-85% by weight, most preferably 50-85% by weight. If the content of the carbon dioxide gas generator is less than 5% by weight, the amount of generated carbon dioxide gas is insufficient, and the coagulation effect by air bubbles may not be sufficiently exhibited.
Even if it exceeds, the effect is saturated, so that it is not economically preferable. Further, when the carbonate and / or bicarbonate and the acid are used in combination as the carbon dioxide generator, the carbonate and / or bicarbonate in the carbon dioxide generator may be used. Is 10 to 7 in terms of solid content.
0% by weight, preferably 10-60% by weight, more preferably 15-50% by weight, most preferably 15-45% by weight
Then, as a result, the generation efficiency of bubbles of carbon dioxide gas is improved,
It is preferable because aggregates in the floor washing waste liquid can be efficiently removed.

The floor cleaning waste liquid treating agent of each of the first and second aspects of the present invention is not particularly limited in form as long as it contains a coagulant and a carbon dioxide generator as essential components. For example, a flocculant and a carbon dioxide generator, which are essential components of a floor washing waste liquid treatment agent, are mixed and integrated, and may be in the form of powder, granules, tablets, or the like, or both components may be individually packaged. It is good also as a form. In addition, the floor cleaning waste liquid treating agent of each of the inventions according to claims 1 and 2 is a solid composition when mixed and integrated, but when both components are individually packaged, both components are powdered. , Granules, tablets and other solid forms,
Either or both components may be individually packaged as a liquid such as an aqueous solution. Further, in addition to the above essential components, the floor washing waste liquid treating agent of each of the inventions according to claims 1 and 2 may optionally contain a fragrance, a pigment, a silicone, a binder, a lubricant disintegrant, a swelling agent, and the like. Can be added.

According to a third aspect of the present invention, there is provided a floor cleaning waste liquid treatment method, wherein the floor cleaning waste liquid treating agent according to the first or second aspect is added. In the method for treating a floor cleaning waste liquid according to the third aspect of the present invention, there is no particular limitation on the method of adding the “floor cleaning waste liquid treating agent”. For example, a powder, granules, and an integrated mixture of a coagulant and a carbon dioxide gas generator,
In addition to the addition of tablets, etc., the individually packaged components are mixed at the time of use, or the individually packaged components are added at the same time, or one of the components is added first, and then the subsequent components are added. It may be added. Further, it may be added in a solid state or in a liquid state. Furthermore,
In the floor cleaning waste liquid treatment method according to the third aspect of the present invention, the amount of the “floor cleaning waste liquid treating agent” added is not particularly limited, and can be appropriately changed depending on the degree of contamination of the floor cleaning waste liquid.

There is no particular limitation on the "floor cleaning liquid" to be treated by the floor cleaning waste liquid treatment method according to the third aspect, provided that it is a waste liquid generated during floor cleaning.
The floor cleaning waste liquid treating agent of the present invention comprises a pH, BO
D value, COD value lower, because it is excellent in clarification,
It can be suitably used as a cleaning waste liquid containing a wax component or a resin component or a cleaning waste liquid generated after using an alkaline cleaning liquid.

According to the method for treating a floor cleaning waste liquid according to the third aspect of the present invention, even if the particles agglomerated by the aggregating agent are relatively small, bubbles of the carbon dioxide gas generated from the carbon dioxide generating agent remain on the surface of the agglomerated particles. By adhering, the aggregated particles float. For this reason, it is not necessary to grow the aggregate to a certain extent as in the conventional case. As a result, not only can the aggregates be efficiently removed, but also the amount of the aggregating agent used to increase the agglomeration efficiency can be reduced, so that the burden on the environment can be reduced. In addition, due to the flow of the liquid when the carbon dioxide gas floats, the labor required for stirring the system is less required than in the past, so that the aggregates can be efficiently separated and removed even with a simple apparatus. Furthermore, since relatively small agglomerates floating with the carbon dioxide gas are present as floating substances on the surface of the processing liquid as they are, floor cleaning waste liquid can be easily removed by an appropriate method such as scooping, filtration or pressing. Can be removed from Also, relatively large objects settle in the liquid again, but due to the large diameter, by filtration or other methods,
Again, it can be easily removed from floor cleaning waste.

The filtrate from which the aggregates have been separated and removed is substantially transparent, so that even if the filtrate is discarded as it is or after dilution, it does not cause water pollution and is easy to discard. Therefore, the load on the wastewater treatment in the next step, such as activated sludge or a trickling filter, can be significantly improved. In addition, the filtrate exhibits excellent detergency (wax removal property) even when it is mixed with a new cleaning liquid and reused as a cleaning liquid as it is or after adjusting pH or the like. As described above, the filtrate can be reused as a part of the washing liquid. This is preferable because a closed cleaning system that does not generate waste liquid can be achieved.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
The effects of the present invention will be described. (1) Method of Example As a floor cleaning waste liquid treating agent used in this example and a comparative example,
The floor cleaning waste liquid treating agents of inventive products 1 to 4 and comparative examples 1 and 2 shown in Table 1 were respectively prepared. In addition, the unit of the numerical value of the compounding amount in Table 1 is% by weight. Then, on the floor coated with floor wax (trade name “Poly's Yushiron Coat New S-1” manufactured by Yushiro Chemical Industry Co., Ltd.), a cleaning liquid (trade name “Poly's Yusilon Pick” manufactured by Yushiro Chemical Co., Ltd.) is applied. (5% diluted solution of moir), and 1 liter of the obtained floor washing waste liquid was obtained. Then, Example 1
As Comparative Examples 1-4 and Comparative Examples 1-2, 80 g of each of the floor cleaning waste liquid treating agents of the products 1-4 of the present invention and Comparative Examples 1-2 were added to 1 liter of this floor cleaning waste liquid. In addition, the above-mentioned floor cleaning waste liquid itself without adding the floor cleaning waste liquid treating agent was used in Comparative Example 3.
And And it left still for 30 minutes from the time when generation | occurrence | production of the bubble by carbon dioxide in Examples 1-4 was stopped.
Then, using activated carbon (trade name "Sheet Semia" manufactured by Asahi Kasei Corporation), the above Examples 1-4 and Comparative Examples 1-3.
Of each floor was filtered.

The pH, COD value and BO of each floor washing waste liquid of Examples 1-4 and Comparative Examples 1-3 obtained by the above filtration.
The D value, appearance, haze value (%) and transmittance (%) were measured by the following methods. The results are shown in Table 2 below. pH: pH was measured using a pH meter (trade name “pH meter F-14” manufactured by Horiba, Ltd.) COD and BOD: JIS-K0102 (1998)
Was measured according to the method described above. Appearance: Observed visually. Haze value (%) and transmittance (%): Measured by a direct-reading haze computer “HGM-2DP” manufactured by Suga Test Instruments Co., Ltd., using a cell having a width of 1 mm.

[0020]

[Table 1]

[0021]

[Table 2]

Example 1 obtained by the above filtration
Floor washing waste liquid is mixed with 10, 20, and 50% by weight of a new cleaning liquid (5% diluent of "Poly's Yusilon Pickmore" (trade name, manufactured by Yushiro Chemical Industry Co., Ltd.)) to prepare a mixed cleaning liquid. did. The cleaning properties (wax removal properties) of the mixed cleaning liquid and the original cleaning liquid are determined according to JIS K3.
920-1991. The floor wax used was "Poly's Yusilon Coat New S-1" (manufactured by Yushiro Chemical Industry Co., Ltd.). The results are shown in Table 3 below. In Table 3, double circles indicate that the cleaning property (wax removal property) is good.

[0023]

[Table 3]

(2) Effects of the Examples As shown in Table 2, the floor cleaning waste liquid was treated by adding the floor cleaning waste liquid treating agents of the present invention products 1 to 4, and as a result, the pH of the floor cleaning waste liquid became And 10.6 in the original floor cleaning waste liquid (Comparative Example 3).
In Comparative Example 1 in which only the coagulant was added, the water was quite acidic, at 3.9, and it was difficult to drain the water as it was. In contrast, Example 1
4 to 5.6 to 7.4, which are neutral to weakly acidic, almost neutral, and have an appropriate pH that does not affect the environment even when drained as it is.

The COD value and the BOD value of the floor cleaning waste liquid are quite high at 103,000 and 56,000 for the original floor cleaning waste liquid (Comparative Example 3). In Comparative Example 2 using only the carbon dioxide gas generator, 98000 and 54000, which are almost the same as Comparative Example 3, indicating no improvement tendency. On the other hand, the COD value and BOD value of Comparative Example 1 using only the flocculant were 61000 and 480.
00, which is slightly improved as compared with Comparative Example 3. In contrast, the COD values and BO values of Examples 1 to 4
D values are 36000-43000 and 38000-460
00, which is significantly lower than that of the original floor cleaning waste liquid (Comparative Example 3) and Comparative Example 2 using only the carbon dioxide gas generating agent, and further lower than Comparative Example 1 using only the flocculant. You can see that In particular, the COD value is less than half that of the original floor cleaning waste liquid (Comparative Example 3),
It can be seen that the OD value lowering effect is exhibited.

Further, comparing the appearance and the transparency of the floor cleaning waste liquid after the treatment, the appearance of the original floor cleaning waste liquid (Comparative Example 3) becomes turbid, the haze value is as high as 85%, and the transparency is 43%.
From this, it can be seen that the state is quite cloudy. Also in Comparative Example 2 using only the carbon dioxide gas generating agent, the appearance was turbid, the haze value was 85%, and the transparency was 42%, which was almost the same as Comparative Example 3. It can be seen that the appearance of the sample was hardly improved. Further, in Comparative Example 1 using only the flocculant, the haze value was 43% and the transparency was 88%, which was slightly improved in appearance as compared with Comparative Examples 2 and 3. However, the appearance was a pale yellow opaque liquid. Yes, it is still not enough to drain as it is.
On the other hand, in Examples 1 to 4, the appearance was a yellow transparent liquid, the haze value was 13 to 17%, which was significantly lower than Comparative Example 1 in which only the flocculant was used, and the transparency was 93 to 97%. Only the value superior to Comparative Example 1 is shown. From these results, Examples 1 to 3 in which a coagulant and a carbon dioxide gas generator were used together
In 4, the appearance of the floor washing waste liquid was compared with Comparative Examples 1 to 3,
It can be seen that it is significantly improved.

As described above, by treating the floor cleaning waste liquid by adding the floor cleaning waste liquid treating agent of the products 1 to 4 of the present invention, the pH of the floor cleaning waste liquid is made neutral to weakly acidic from the alkali side,
The BOD value and COD value can be reduced, and the appearance can be improved. As a result, the floor cleaning waste liquid after the treatment can be easily drained without lowering the water quality of a river or the like or causing water pollution even when drained.

Further, as shown in Table 3, even if the obtained floor cleaning solution is mixed with a new cleaning solution and reused as a mixed cleaning solution, compared with the original cleaning solution (addition amount 0), It can be seen that the properties (wax removal properties) are not reduced, and that they still have good cleaning properties (wax removal properties).
From this result, it can be seen that the floor cleaning waste liquid treating agent of the present invention and the floor cleaning treatment liquid obtained by the floor cleaning waste liquid treating method using the same can be reused as a detergent diluent for floor cleaning.

It should be noted that the present invention is not limited to the specific examples described above, but may be variously modified within the scope of the present invention in accordance with the purpose and application.

[0030]

According to the floor cleaning waste liquid treating agent and the floor cleaning waste liquid treating method of the present invention, even if the particles agglomerated by the flocculant are in a relatively small state, the surface of the bubble of the carbon dioxide gas generated from the carbon dioxide gas generating agent remains on the surface. It can be lifted by suction. As a result, not only can the flocculant in the floor cleaning waste liquid be efficiently removed, but also the amount of the flocculant used to increase the flocculation efficiency can be reduced, so that the burden on the environment can be reduced, and furthermore, the method is simple. Aggregates can be separated and removed efficiently with the device. Furthermore, according to the method for reusing floor cleaning waste liquid of the present invention, even when the floor cleaning waste liquid is mixed with the original cleaning liquid and reused as the cleaning liquid, excellent cleaning properties (wax removal properties) are exhibited. No closed cleaning system can be achieved.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D015 BA04 BA06 BA19 BA22 CA07 DA02 DA12 DA32 DB02 DB12 EA23 EA33 FA13 4D037 AA11 BA03 BB08 BB09 CA08 4D062 BA04 BA06 BA19 BA22 CA07 DA02 DA12 DA32 DB02 DB12 EA23 EA33 FA13

Claims (4)

[Claims] 1. A floor cleaning waste liquid treating agent comprising a coagulant and a carbon dioxide gas generating agent. 2. The floor cleaning waste liquid treating agent according to claim 1, wherein the carbon dioxide gas generating agent comprises a carbonate and / or a bicarbonate and an acid. 3. A floor cleaning waste liquid treatment method comprising adding the floor cleaning waste liquid treating agent according to claim 1 or 2 to the floor cleaning waste liquid. 4. A method for reusing floor cleaning waste liquid, wherein the floor cleaning waste liquid treated by the method according to claim 3 is reused as a part of the cleaning liquid.