JP2008194553A - Treatment agent and method for sewage generated by removal of floor wax - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable simple and quick treatment of sewage generated by removal of floor wax. <P>SOLUTION: A treatment agent for the sewage generated by removal of floor wax contains an acid sulfate that actions on the sewage to separate solids dissolved in it. Its treatment method enables the sewage generated by removal of floor wax to be poured into an aqueous solution containing the acid sulfate, which separates the dissolved solids from the sewage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a process of peeling off the wax on the floor surface applied to the floor of the building, reapplying the wax again to beautify and regenerate the floor surface, and separating the melt containing the wax component contained in the separated sewage. It relates to the method of hardening and the treatment agent.

  Conventionally, a polymer condensing agent has been used exclusively for the treatment of factory wastewater in sewage treatment, and a similar treatment agent has been used for the treatment of floor wax peeling sewage. These methods have a drawback that it takes a long time to solidify the dissolved solid after administration of the flocculant, and the condensate is sticky, which causes clogging easily during filtration. Yes, there is a large practical problem when a quick work such as a peeling work for building maintenance is required.

  The sewage from which the wax on the dirty floor has been removed with a release agent has been treated by draining it together with water. In recent years, pollution problems have been raised and sewage treatment has become an urgent issue. It is not a large scale like factory wastewater, but it is usually collected in a cylindrical container called a pail can at each site, and the current situation of flowing this to the drain outlet has not received much attention so far It was. However, from the viewpoint of environmental conservation, public opinion is moving urgently to ban sewage drainage, and its solution is an urgent issue.

In building maintenance, in order to disseminate floor wax peeling sewage treatment at a practical level,
1. Since the floor wax peeling wastewater is generally collected in a cylindrical container having a capacity of about 18 to 20 liters called a pail can, it is most preferable that it can be treated in this unit.
2. Since workers are working in time, it is necessary to treat sewage quickly and it is practically essential that solidification occurs instantaneously.
3. It is necessary that the state of the precipitate generated in the pail can be suitable for the next step, that is, separation of the precipitate. That is, the condensate is not sticky, the filter medium is not clogged during separation work such as filtration, and the filtration speed is high.
4). The filtered solid must be easy to handle.
Etc. are required.

  Usually, when treating sewage with a polymer coagulant, it is usually left and settled for a considerably long time, for example, 20 minutes or more, and the filtration step for removing these often takes 30 minutes or more. It is said that whether these can be done in a short time will determine the success or failure of practical application. However, at present, neither a means for meeting these requirements nor a coagulant is known.

  The first effect of the present invention is that coagulation starts immediately by bringing the aqueous solution containing the treatment agent of the present invention into contact with the stripped waste water.

  The second effect of the present invention is that the solidification is separated from the sewage system so that it solidifies, rather than solidifying, and gradually develops into one solid lump, resulting in solids and a transparent liquid layer. Separate immediately.

  The third effect of the present invention is that the properties of solids are very easy to separate. Since the precipitates are not sticky, as is the case with conventional solids separated by conventional coagulants, they do not require filtration with a filter cloth or paper, and can be separated neatly with a wire mesh. is there. According to the present invention, the problem of workability that has been impeded until practical use has been solved.

  The treatment agent for floor wax peeling sewage according to the present invention acts on the peeling sewage obtained by peeling off the floor wax to separate the solid matter dissolved in the peeling sewage. Contains salt.

  Further, the treatment method according to the present invention is characterized in that the dissolved solid matter is separated from the stripped waste water of the floor wax by pouring the stripped waste water from which the floor wax has been stripped into an aqueous solution containing acidic sulfate. .

  Further, in the treatment method according to the present invention, the stripped sewage from which the floor wax has been peeled is treated with an aqueous solution containing acidic sulfate and acidic sulfate, and the liquid portion from which the dissolved solid matter is separated is mixed with carbonate. The disappearance of the foaming phenomenon is used as an indicator of completion of neutralization.

  According to the present invention, it is possible to easily and quickly remove floor wax peeling sewage, which has been left open until now, at a practical level, easily and labor-saving. This is an important invention that shows long-term effects.

  The features of the present invention are listed below.

  One of the features of the present invention is that no organic compound such as a polymer coagulant is used for coagulating wastewater, and only an inorganic compound is used. Further, one of the characteristics of the present invention is that the inorganic compound contains at least one selected from the group consisting of acidic sulfates such as sodium bisulfate (sometimes referred to as sodium hydrogensulfate and acidic sodium sulfate), ammonium bisulfate, and potassium bisulfate. It is to use an aqueous solution containing the coagulation liquid.

  In addition, an inorganic salt such as sodium chloride, sodium sulfate, or calcium chloride can be added to the above solution in order to produce a salting out effect.

  Further, one of the characteristics of the present invention is that the amount of the acid sulfate is added at a time instead of being added little by little with stirring. The amount used may be divided into several times, but it is best to add it at a time. It should be avoided to add a small amount while stirring. When poured at once, the coagulated material becomes dumpling, and the solidified body can be removed by hand, for example, by omitting the filtration process, or it can be easily removed by pouring the coagulation system into a wire mesh.

  The reason why the solid matter containing the dissolved resin wax separates into a dumpling form when an acidic sulfate aqueous solution is added to the floor wax peeling sewage is not clear. There is no such description in the literature. This phenomenon has been found experimentally by chance when the present inventor is considering various treatments for stripped wastewater.

  In the coagulation work of the present invention, it is also important to add the aqueous solution containing the acidic sulfate ion of the present invention. The most effective method is different from common sense, and the method in which the peeled sewage is poured first from the aqueous solution containing the acidic sulfate ion of the present invention is the best. Solidification occurs from the bottom, and the system is naturally agitated by the injection of sewage, so that the agitation step conventionally required can be omitted. Solidification occurs from the bottom, gradually progresses to the top and hardens in a dumpling form, so removal is easy.

  Of course, a method in which exfoliated sewage is first put in a pail can and an aqueous solution containing the acidic sulfate ion is poured at once is used. However, in this case, the stirring effect cannot be obtained, so the next step is necessary. In other words, it takes time to coagulate unless it is gently stirred. In this case, if the mixture is vigorously stirred, the precipitate becomes fine, and it takes a long time for filtration, which is not preferable. In this case as well, when poured all at once, the precipitate tends to be a large dumpling-like lump than the method of dropping the coagulation liquid while stirring, which is advantageous for separation and filtration in the next step.

  In practicing the present invention, the method of adding sewage in small portions while stirring, as is usually done, is not preferred and should be avoided. Although it is common sense to add the coagulant while stirring, it is not suitable for the practice of the present invention. In the practice of the present invention, if the coagulant is added dropwise with stirring, the precipitates become finer, resulting in clogging of the filtration and a long time for the filtration, which becomes a fatal defect in practical use.

  Furthermore, one of the characteristics of the present invention is a method for treating a residual liquid containing a precipitate or after separation. The floor peeling sewage is alkaline due to the influence of the peeling agent. The residual liquid after treating sewage with the method of the present invention is acidic. Since it cannot be discarded as it is, it must be neutralized to neutrality. Usually, a method of confirming neutralization by changing the color of an indicator (indicator) while stirring a liquid or dropping a liquid or powder neutralizer is used. It is very laborious. In the present invention, a method has been found that rationalizes these operations and obtains confirmation of neutralization without using an indicator.

  When practicing the present invention, neutralization is performed while carbon dioxide gas is generated when carbonate or bicarbonate dissolved in powder or water is added little by little to the residual liquid obtained by removing dissolved solids from exfoliated wastewater. If the generation of gas is not observed when the above carbonates and bicarbonates are added, the neutralization is completed. What is superior to this method is that if the neutralizer is added too much, it goes too far to the alkaline side, and it is necessary to adjust it by adding acid. This is a solution to the problem.

  According to the method of the present invention, there is no problem even if the carbonate or the like is added excessively. This is because the system is a buffer solution, and even if the carbonate or the like is added excessively, the pH is not affected, so that the neutralized state is maintained. This is an extremely important matter in actual work, and occupies an important position in carrying out the present invention.

  Examples of carbonates and bicarbonates as neutralizing agents of the present invention include sodium carbonate, potassium carbonate, sodium bicarbonate (sodium bicarbonate), potassium bicarbonate and the like. Particularly useful is sodium bicarbonate. This is because the neutralization proceeds slowly and the workability is excellent, and the actual work can be performed efficiently and safely. In carrying out the neutralization operation, the carbonates and the like may be dissolved in water, but the most excellent method is a method of adding them in powder form. It is important not only that the work is simple, but also that it is easy to confirm the generation of the added gas in order to see the completion of neutralization.

  The amount of acid sulfate (gr :: W) used in carrying out the present invention is in the range of 1/300 to 1/10 in terms of W / V ratio with respect to the capacity (m: V) of treated wastewater. Is more preferable, and more preferably 1/200 to 1/20. If this ratio is less than 1/300, solidification may be insufficient, and if it is more than 1/10, the excess may be wasted and may cause environmental pollution.

  As described above, the present invention has succeeded in separating and removing the dissolved solids from the separated sewage from which the floor surface has been peeled off by an extremely simple operation, and provides an effective means for preventing environmental pollution. .

  The invention is further illustrated by the following examples.

  A resin floor was applied and the dirty floor surface that had been half a year old was peeled off with a commercially available release agent solution, and 2 liters of the waste water was used as test waste water. 10 grams of acidic sodium sulfate was used as the acidic sulfate, which was dissolved in 300 milliliters of water and added to the container. On top of that, 2 liters of the sewage was poured all at once. A massive precipitate was instantly formed, and the turbid liquid became a transparent liquid. After 5 minutes, the lump was easily picked up and placed on a wire mesh. When this lump was pressed by hand, some clear liquid was squeezed out. The liquid was acidic. When sodium bicarbonate powder is added to this, fine bubbles appear. When the sodium bicarbonate powder was continuously added with gentle stirring, the bubbles eventually disappeared. When the pH was examined with a litmus paper, the pH was 7, indicating that it was neutralized. Further, when a pH of the sodium bicarbonate powder was further investigated by adding a little powder of sodium bicarbonate, the pH was 7 and was not changed.

  The same as Example 1 except that 20 grams of acidic potassium sulfate was used as the acidic sulfate instead of acidic sodium sulfate. Also in this example, when exfoliated wastewater was added to the acidic aqueous solution at once, a massive precipitate was instantly formed, and the contaminated liquid became a transparent liquid.

  In the same manner as in Example 1, the pH of the sodium bicarbonate powder was 7 when the pH was examined with a litmus paper while adding the foam until the generation of bubbles was stopped while gently stirring.

  In this example, the same test sewage and acidic sulfate as in Example 1 were used, but instead of pouring the peeling sewage liquid from above the acidic sodium sulfate aqueous solution, the acidic sodium sulfate aqueous solution from above the peeling sewage liquid. Was poured all at once. It was observed that coagulation progressed instantaneously from the upper part of the sewage, a massive precipitate formed, and the coagulated mass of the mass extended downward with time. In this case, since the system was not stirred, it took some time for solidification, and solidification was accelerated when gently stirred. The part other than the solid lump solid was a transparent liquid.

(Reference Example 1)
The same peeling sewage and acidic sodium sulfate aqueous solution as used in Example 1 were used, but the way of mixing them was different. In this reference example, an acidic sodium sulfate aqueous solution, which is a coagulation solution, was gradually added dropwise while stirring a common-sense general method, that is, a solution of exfoliated wastewater. Although precipitation was observed at the same time as dropping, the form was soft flaky or fine powdery and sticky, it did not harden into one, and filtration was necessary to remove it. Moreover, the filter cloth was clogged during the filtration, and the filtration took a long time. The filtered part was sticky and very difficult to handle.

Claims (3)

  A treating agent for exfoliated wastewater of floor wax containing acidic sulfate, which acts on exfoliated wastewater obtained by exfoliating floor wax and separates solids dissolved in the exfoliated wastewater.   The floor wax is poured from above the aqueous solution containing acidic sulfate by pouring the stripped sewage from which the floor wax has been peeled off or by pouring the aqueous solution containing the acidic sulfate from the top of the stripped sewage at once or divided into several times. A method for treating floor wax peeling sewage, comprising separating a dissolved solid from the peeling sewage.   Treating stripped sewage from which floor wax has been stripped with an aqueous solution containing acidic sulfate and acidic sulfate, and neutralizing the liquid portion from which the dissolved solids have been separated with carbonate to neutralize the foaming phenomenon. A method for treating floor wax peeling sewage as an indicator of sum completion.