KR20070034724A - Paint dehumidifier - Google Patents

Abstract

The present invention provides a biological paint detackifier. The paint detackifier provided by the present invention includes a fungal culture. One embodiment of the paint detackifier of the present invention may further comprise an additional nutrient source for promoting further growth of the fungus. When the paint viscosity remover of the present invention containing a mold culture is added to the circulating water in which the paint is scrubbed, the paint in the circulating water easily forms aggregates, and the aggregates are not viscous. In addition, the decomposition of harmful substances by the biodegradation of the fungal culture is made, the harmful substance content of the aggregate is very low. In addition, the water quality of the circulating water is improved. In addition, since some of the paint components in the circulating water are metabolized and converted into cell mass or carbon dioxide, the amount of sludge (non-sticky aggregate of paint) can be reduced.

Paint, Detackifier

Description

Paint detackification agent {Paint detackification agent}

1 is a graph showing the cumulative oxygen intake of the paint viscosity removal process performed in one embodiment of the present invention.

Figure 2 is a photograph showing the appearance of the paint solution treated in one embodiment of the present invention (Fig. 2 (B)), the appearance of the "uninoculated" paint solution (Fig. 2 (A)).

FIG. 3 shows a micrograph of a paint sludge of an “inoculated” paint solution of one embodiment of the present invention (FIG. 3B) and a micrograph of a “uninoculated” paint solution (FIG. 3A). .

The present invention relates to a paint detackification agent.

Paint degreasing agents are agents for removing the viscosity (or stickiness) of the overspray paint, for example, to easily remove the overspray paint from the paint spray booth. It is used for the same purpose.

Paint spray booths are widely used for the painting of relatively large articles such as, for example, automobiles and refrigerators. In general, in a paint spray booth, the article to be painted is conveyed by a conveyor line, the paint is sprayed onto the article by a spray gun installed next to the conveyor line, and a portion of the sprayed paint is It is attached to the surface of the article. At this time, the remaining amount of the sprayed paint not attached to the article is called overspray paint.

The overspray paint will form a fine mist in the ambient air of the painted article. When left in the mist, due to the viscosity of the paint, the overspray paint sticks to the walls of the spray booths, conveyor lines, other devices in the spray booths, etc. and aggregates or accumulates. To prevent this, the overspray paint mist must be removed from inside the spray booth. For this purpose, the air in the spray booth is forced out. The forced exhaust air passes through a water curtain before exiting the spray booth, where overspray paint in the forced exhaust air is scrubbed by the water in the water wall. The water that collects the overspray paint flows into the sump, which is usually located below the spray booth. In the sump, the overspray paint is removed from the water and treated as waste, and the water is recycled back to the water wall. This water, which is fed back to the water wall by recirculation and used to collect overspray paint, is called circulating water.

However, since the paint is a tacky material, the collected overspray paint is easily agglomerated-attached-accumulated in the circulating water, forming sludge that is tacky and sticky like tar, and this sludge Will close the pump and pipe of the circulating water system. Moreover, it is very difficult to remove such sludge stuck to the pump and pipe of the circulating water system. In order to prevent this phenomenon, the paint viscosity remover is added to the circulating water.

When the paint dedusting agent is added to the circulating water, the overspray paint in the circulating water condenses to form fine particles, and these fine particles form larger particles through the aggregation process, and the aggregated particles are not sticky. That is, the purpose of using the paint detackifier is to prevent the aggregated paint particles from becoming sticky. The resulting non-tacky aggregates circulate with the circulating water and collect in the sump tank without sticking to the pump or pipe of the circulating water system. Non-tacky aggregates collected in the sump float on the water surface and can be easily separated and discarded.

As main components of existing paint detackifiers, organic or inorganic compounds having coagulation and / or cohesion have been mainly used. For example, U.S. Patent Application Publication No. 2004/0000329 A1 discloses dialkylaminoalkyl (meth) acrylate polymers, metal complex salts, hexic acid polymers, montmorillonite-containing clays, poly [oxyalkylene (dialkylimino) alkyls. Len] polymers, epihalohydrin / dialkylamine polymers, polydiallyldialkylammonium halide polymers, polyeamines, and the like, and overspray paint removal methods using coagulants are disclosed. In another example, Korean Patent Laid-Open Publication No. 2002-0042252 discloses a paint dedusting agent made of a cationic water-soluble polymer obtained by hydrochloric acid treatment of formaldehyde melamine resin.

One of the other important problems raised with the removal of overspray paint is the amount of overspray paint sludge separated from the circulating water. Since most of the solid components contained in the paint dedusting agent are contained in the sludge as it is, in the case of using the inorganic compound-based paint dedusting agent, the amount of generation of the sludge increases. This will eventually increase the cost of disposal of the sludge.

Another important problem that arises with the removal of overspray paint is due to the hazardous substances that may be present in the paint. For example, the paint may contain harmful substances such as polycyclic aromatic hydrocarbon (PAH), benzene, toluene, ethylbenzene and xylene (BTEX), and the like. (Naphthalene, a type of PAH, is known as a potent carcinogen. Toluene, a type of BTEX, is used as a paint thinner.) Therefore, these harmful substances remain in the overspray paint sludge separated from the circulating water. However, these sludges can be classified as specific wastes. The cost of treating specific waste is much higher than that of general waste.

Thus, it is possible not only to effectively produce non-tacky aggregates of overspray paint in the circulating water, but also to reduce the amount of sludge (non-tacky aggregates of overspray paint), and also to reduce the amount of harmful substances in the sludge. There is an urgent need for new paint detackifiers.

The present invention provides a biological paint detackifier.

The paint detackifier provided by the present invention includes a fungal culture. One embodiment of the paint detackifier of the present invention may further comprise an additional nutrient source for promoting further growth of the fungus.

The inventors of the present invention have found the surprising fact that fungal cultures can effectively remove the viscosity of paint in circulating water. That is, when the paint viscosity remover of the present invention containing a mold culture is added to the circulating water in which the scrub the paint, the paint in the circulating water easily forms aggregates, and the aggregates are not viscous. In addition, the decomposition of harmful substances by the biodegradation of the fungal culture is made, the harmful substance content of the aggregate is very low. In addition, the water quality of the circulating water is improved. In addition, since some of the paint components in the circulating water are metabolized and converted into cell mass or carbon dioxide, the amount of sludge (non-sticky aggregate of paint) can be reduced.

Hereinafter, the paint detackifier of the present invention including a fungal culture will be described in more detail.

The fungal cultures refer to a biological material obtained by culturing fungal (filamentous fungi). The fungus means fungi other than mushrooms and unicellular yeasts having apparent fruiting.

Molds usable in the present invention include, for example, panes such as phanerochaete chrysosporium (Accession No .: ATCC 24725) and Panerocaete sordida (Accession No .: ATCC 90872). Fungi of the genus Rocaete; Fungi of the genus Trametis, for example trametis versicolor (Accession Number: ATCC 48424); Fungi of the genus Cunninghamela , such as, for example, cunninghamella elegans (Accession Number: ATCC 36112); For example, penicillium sp. Fungi of the genus Penicillium such as G-1 ( penicillium sp. G-1 , Accession No .: ATCC 74414); Or a combination thereof. These molds are known microorganisms and can be easily obtained from microbial deposit institutions (for example, American Type Culture Collection (ATCC)).

Fungal cultures can be prepared by a variety of known methods, for example, as described below. The fungus is grown on the surface of agar medium, such as malt extract agar plate or Sabouraud agar plate, at a temperature of about 23-33 ° C. for about 3-10 days. Then, agar medium pieces with grown fungi or attached fungi are attached to a 250 mL or 500 mL Elenmeyer flask containing about 20-100 mL of liquid culture medium, such as malt extract medium or saborod medium. Inoculate. The malt extract medium can be obtained by adding 5 g of malt extract, 1.8 g of maltose, 6 g of dextrose and 1.2 g of yeast extract in 1 liter of deionized water. Saborod media can be obtained by enzymatic digest of 10 g of casein and 20 g of dextrose in 1 liter of deionized water. The flask is then incubated for about 3-10 days in a shaking incubator at about 50-250 rpm and about 23-33 ° C. The culture solution thus obtained is homogenized using a glass homogenizer or a waring blender to obtain a fungal culture usable in the present invention. Of course, fungal cultures prepared by various other methods can also be used as the fungal culture of the present invention. A typical packed mycelium volume (PMV) of such fungal culture may be, for example, from about 5% to about 40% by weight.

As is known, Panerocatete Chrysosporium, Panerocatete Sorida and Trametis versicolo are a type of white-rot fungi. White mold fungi can degrade the lignin component of wood, thereby effectively bleaching the brown coloration that occurs with lignin. On the other hand, Panerecaete chrysosporium, the secondary decomposer of hardwood and softwood, does not use phenol oxidase, such as laccase, unlike other white rot fungi. I have a system. The lignin degradation system of Panerecaete chrysosporium includes, for example, lignin peroxidase (LiP), manganese peroxidase (MnP), cellobiohydrolase, endo Glucanase, beta-glucosidase, glyoxal oxidase, silanase, xylosidase, alpha-galactosidase ), Various enzymes and biochemical intermediates such as pyranose 2-oxidase, superoxide dismutase, mannose-6-phosphatase and the like. LiP and MnP enzymes isolated from Panerecaete chrysosporium are used in biologically contaminated soils with a wide variety of organic materials such as textile dyes, polyethylene, insecticides, herbicides, dynamite, polycyclic aromatic hydrocarbons (PAH), dioxins, oils, and the like. It is useful for purification.

As is known, the genus Cunninghamela is a representative of the mucorale order and is frequently found in soil, grain and other organic substrates. Kerninghamela elegans can metabolize a wide variety of xenobiotics using the Face I (oxidative) and Face II (conjugating) biotransformation mechanisms. Kerninghamela Elegance's Chitochrome P-450 enzyme system is used to neutralize various polycyclic aromatic hydrocarbon (PAH) pollutants such as industrial dyes, hazardous by-products from diesel fuel combustion, and organic pesticides.

Such fungal cultures exhibit a very good paint detackifying effect. For example, when the paint viscosity remover of the present invention is put into the circulating water of a spray booth, the paint in the circulating water not only easily forms aggregates, but also the aggregates are not viscous. In addition, the paint detackifier of the present invention does not use an organic or inorganic compound such as a coagulant or a flocculant, thereby enabling environmentally friendly paint detackification.

In addition, since the decomposition of harmful substances by the biodegradation of the fungal culture is made, the harmful substance content of the aggregate is very low. For example, harmful substances such as PAH and BTEX can be biodegraded by white rot fungi such as Panerocate chrysosporium, Panerocatete sorbida and Cunninghamela elegans. Biodegradation of other harmful substances by other fungal cultures is also possible. For example, isobutyl alcohol, 2-ethyl hexanol, N-butoxy propanol, N-propoxypropanol, and the like are easily prepared by fungal cultures such as Kerninghamella elegans or Panerecaete chrysosporium. Can be metabolized. Due to the biodegradability of such fungal cultures, the use of the paint demulsifier of the present invention comprising a fungal culture makes it possible to treat sludge generated in the overspray paint removal process as general waste, thereby The processing cost can be reduced.

In addition, due to the biodegradability of the fungal culture, the organic compound content of the circulation water of the spray booth itself, as measured by TOC, BOD and COD, can be reduced. Thus, the water quality of the circulating water can be maintained in a good state.

In addition, using the paint detackifier of the present invention, it is possible to reduce the amount of sludge (non-tacky aggregate of paint) generated in the spray booth. The reason is that during the growth of the fungal culture in the circulation water of the spray booth, some of the paint components in the circulation water are metabolized and converted into cell mass or carbon dioxide. For example, melamine resins or acrylic polymers can be biodegraded into small molecular weight materials by fungal cultures. These small molecular weight substances are degraded or metabolized to carbon dioxide by additional biochemical processes to produce cells.

A "paint" to which the paint detackifier of the present invention may be applied is any mixture comprising a resin, a pigment and a vehicle, and is a paint, lacquer, varnish. , Base coat, clear coat, primer, and the like. "Paint" also encompasses waterborne paint and solventborne paint. In recent years, in order to reduce the amount of solvent discharged, the use of oil paint is decreasing, and the use of water paint is increasing. The aqueous paint contains, for example, a resin component such as an acrylic polymer or melamine resin, a vehicle component such as isopropyl alcohol, butanol or hexanol, an inorganic salt such as barium sulfate or aluminum oxide, and the like. A typical example of an aqueous paint used for basecoats in the automotive industry is "WBC-710 6T3 Dark Green Mica (E.I. Dupont de Nemours & Co., Wilmington, DE, USA)". The composition of this aqueous paint is shown in Table 1.

ingredient CAS number Content (% by weight) Acrylic polymer - 7-13 Melamine resin 68955-24-8 7-13 Trade secrets - 0.5-1.5 Isobutyl Alcohol 78-83-1 0.5-1.5 2-ethylhexanol 104-76-7 0.5-1.5 water 7732-18-5 60-100 N-butoxypropanol 5131-66-8 1-5 N-propoxypropanol 1569-01-3 3 ~ 7 Carbon black 1333-86-4 0.1-1.0 Barium sulfate 7727-43-7 1-5 Acrylic latex - 1-5 Aluminum oxide 1344-28-1 1-5

One embodiment of the paint detackifier of the present invention may further comprise an additional nutrient source for promoting further growth of the fungus.

Fungal cultures inoculated in circulating water can, by themselves, exert a detackifying effect of the paint and biodegradation of organic compounds. However, if the inoculated fungus additionally grows in the circulating water, the effect of the paint detackifier of the present invention can be amplified. As mentioned earlier, the paint contains various chemical components. Among them, the organic carbon compound may be used as a food source for the growth of inoculated fungi. Thus, even without a separate additional nutrient source, further growth of the fungus in the circulating water is possible. However, in addition to fungal cultures, if a nutrient source to promote further growth of the fungus is added to the circulating water that collects the paint, the further growth of the fungus in the circulating water can be further enhanced. . It is also possible to reduce the initial dose of fungal cultures.

Additional nutrient sources for promoting the growth or metabolism of microorganisms, such as fungi, preferably contain components such as carbon sources, nitrogen sources, vitamins, minerals and the like. Specific examples of additional nutritional sources include "Bio Accelerator 32 (KAM Biotechnology Ltd., BC, Canada)". "Bio Accelerator 32" contains essential nutrients such as yeast vegetable protein, caseins, vitamins and minerals.

In this embodiment, the content of the additional nutrient source in the paint detackifier is not particularly limited and can be easily determined by those skilled in the art in view of the type and application of the mold. However, if the content is too small, the effect of promoting further growth of the mold is insignificant, and even if the content is too much, the effect of promoting further growth of the mold may be saturated. For example, the content of additional nutrient sources in the paint detackifier may be from about 2 to about 40 parts by weight based on 100 parts by weight of the fungal culture.

The paint detackifier of this embodiment may be prepared just before use. For example, the fungal culture and the additional nutrient source may be stored in separate containers and mixed with the fungal culture and the additional nutrient source just before being put into the circulating water of the paint booth. As another variant, fungal cultures and additional nutrient sources may be added to the circulating water of the paint booth, respectively, which will also correspond to the implementation of the paint detackifier of this embodiment.

The paint detackifier of the present invention can be used in various fields for the purpose of removing the overspray paint generated in the spray booth, as well as for the dedusting of other paints.

Hereinafter, the paint viscosity remover of the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited to the following examples.

<Example>

Viscosity removal effect evaluation index

Standardized methods for quantitatively measuring paint descaling effects have not yet been established, but several practical methods are introduced in USP 4,992,199, 5,614,103 and 6,485,656. In the present invention, two methods were used to analyze the overall performance of the paint dedusting. The first method is to measure the "supernatant permeability" of the "paint solution (mixture of water and paint)" before and after paint detackifier treatment. Supernatant permeability is a measure of how effectively the paint sludge separates from the paint solution. Supernatant permeability was measured at 450 nm. The second method is to measure the "sludge generation amount" generated after the paint detackifier treatment. Sludge generation was measured after drying the paint sludge for 8 hours at 105 ℃.

Biodegradation Effect Evaluation Index

The biodegradation effect of the fungal culture was evaluated by comparing the COD, BOD and TOC of the paint solution before and after the paint demulsifier treatment of the present invention.

Chemical oxygen demand (COD) refers to the amount of oxygen needed to oxidize organic matter in water. Thus, COD can be used as an indicator of the content of organic matter in water. In the present invention, the measurement of COD was made by the closed reflux colorimetric method according to the standard test method 5220D for analysis of water and wastewater of the American Public Health Association (APHA).

Biochemical oxygen demand (BOD) refers to the amount of oxygen required for microorganisms to break down organic matter in water. BOD can also be used as an indicator of the content of organic matter in water. The measurement of BOD takes place over a period of time, typically for five days, in which case the measurement results are called BOD5. In the present invention, the BOD was measured based on the APHA 5210B test method.

TOC (total organic carbon) represents the amount of carbon covalent bonds of organic compounds contained in the sample and is determined by measuring the amount of carbon dioxide generated from the organic compound after spraying the sample into the combustion chamber. In the present invention, the TOC was measured using the high temperature combustion test based on APHA 5310B.

Respirometer

In some embodiments of the present invention, in order to confirm the biodegradation effect of the fungal culture, a paint detackification process was performed in conjunction with the respiratory rate meter. A respiratory rate meter is a device that monitors biochemical reactions by measuring the exchange of gases. The respiratory rate meter used in the present invention (Model AER-200, Challenge Environmental System Inc., AR, USA) is a model that can operate online, and can monitor and record the progress of biochemical reactions. The oxygen uptake consumed in the sealed container was measured at intervals of 10 minutes while continuously supplying oxygen to the sealed container in which the paint viscosity removal process was performed using the respiratory rate meter.

Preparation Example 1 --- Preparation of Panerokate Chrysosporium Culture

Panerecaete chrysosporium (ATCC 24725) was grown on the surface of the malt extract agar plate at a temperature of 26 ° C. for 7 days. Next, agar medium surface pieces (1 cm x 1 cm) in which Panerecaete chrysosporium was grown were cut out and inoculated into a 250 ml Elenmeyer flask containing 50 ml of malt extract medium. The flask was then incubated for 7 days in a shaker at 180 rpm and 26 ° C. The culture solution thus obtained was homogenized using a glass homogenizer to obtain a panerocaete chrysosporium culture.

Preparation Example 2 --- Preparation of Panerocaete Sorida Culture

A panerecaete sorbida culture was prepared in the same manner and conditions as in Preparation Example 1, except that Panereca et Sorida (ATCC 90872) was used.

Preparation Example 3 --- Preparation of Trametis Versicolo Culture

The culture was prepared in the same manner and conditions as in Preparation Example 1 except that Tramethis Versicolo (ATCC 48424) was used.

Preparation Example 4 Preparation of Cunninghamela Elgans Culture

Except for using the Canninghamela elegans (ATCC 36112), the Canninghamela elegans culture was prepared in the same manner and conditions as in Preparation Example 1.

Preparation Example 5 --- penicillium sp. Preparation of G-1 Cultures

Penicillium sp. Except for using G-1 (ATCC 74414), Penicillium sp. G-1 cultures were prepared.

Example 1 --- Paint Viscosity Removal by Kerninghamela elegans Culture

The paint dedusting agent used in this example uses the Cunninghamela elegans culture obtained in Production Example 4 as a mold culture, and uses "Bio Accelerate 32" as an additional source of nutrition. In this example, the paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water was treated.

First, 500 ml of the paint solution was placed in an airtight container, and then 10 ml of the Kerninghamela elegans culture and 10 ml of a 10% by weight "Bio Accelerate 32" aqueous solution were inoculated into the airtight container. Then, the sealed container was incubated in a constant temperature water bath at 26 ℃. The airtight container was connected to a respiratory rate meter, and the cumulative oxygen intake was measured for 10 days. 1 is a graph showing the cumulative oxygen intake amount of this embodiment. Figure 1 also shows the results of oxygen intake measurement for the same paint solution not inoculated with the paint detackifier of the present invention. As shown in FIG. 1, the oxygen intake was not observed in the "non-inoculated" paint solution, while the continuous oxygen intake was observed in the "inoculated" paint solution of this example. From this, it can be seen that in the inoculated paint solution, the fungal culture metabolizes the components of the paint solution, converting the organic carbon source into carbon dioxide and cells.

The paint solution treated as described above was transferred to a graduated cylinder, and then its appearance was observed. FIG. 2 is a photograph showing the appearance of the paint solution treated in the present embodiment (FIG. 2B) and the appearance of the “uninoculated” paint solution (FIG. 2A). As shown in FIG. 2, no paint particle deposits were observed in the "non-inoculated" paint solution, whereas the supernatant and precipitated paint sludge were clearly separated in the "inoculated" paint solution of this example. Moreover, the paint particle did not adhere to the wall surface of the supernatant part of the graduated cylinder. From this, it can be seen that the paint detackifier of the present embodiment exhibits a very excellent paint dedusting effect by effectively forming a paint aggregate which is well separated from water and has a non-tackiness.

The paint sludge generated in the "inoculated" paint solution of this example was observed under a microscope. FIG. 3 shows a micrograph of the paint sludge of the "inoculated" paint solution of this example (FIG. 3B) and a micrograph of the "uninoculated" paint solution (FIG. 3A). As shown in FIG. 3, only small sized paint particles were observed in the “uninoculated” paint solution. On the other hand, large paint aggregates were observed in the paint sludge of the "inoculated" paint solution of this example, and it was also confirmed that the fungus proliferated.

Table 2 summarizes the properties of the paint solution before and after treatment with the paint detackifier of this example.

Item Paint solution before treatment Paint solution after treatment Exterior Dark gray paint suspension Clear supernatant and non-stick paint sludge sediment pH 7.25 7.44 COD (ppm) 9130 5140 Total solid content (% by weight) 0.39 0.29 Permeability (%) 26.30 88.64 (supernatant)

In Table 2, the paint viscosity removal effect of the paint viscosity remover of this embodiment can be confirmed through the appearance, total solid content and permeability. As mentioned earlier, the paint solution before "treatment" is a dark gray paint suspension, while the paint solution after "treatment" is clearly separated into clear supernatant and non-stick paint sludge deposits. In addition, while the permeability of the paint solution before the treatment is 26.30%, the permeability of the supernatant after the treatment is greatly improved to 88.64%. This confirms that the paint aggregate has a property of separating well from water. Moreover, the total solid content after treatment is greatly reduced compared to before treatment. From this, it can be seen that through biodegradation, the viscosity remover of this embodiment can reduce the amount of paint sludge generated. In Table 2, it is COD that clearly shows the biodegradation effect of the detackifier of this example. The COD of the paint solution before the treatment was 9130 ppm, while the COD of the paint solution (the supernatant) after the treatment was 5140 ppm. This is a whopping 44% reduction. From this, the superiority of the biodegradation effect of the paint viscosity remover of this embodiment can be confirmed once again.

Table 3 summarizes the measurement results of the residual aromatic content of the paint sludge before and after treatment with the paint detackifier of this example. Aromatic content is measured by GC-MSD according to EPA standard test method.

division Item Pretreatment (ppm) After treatment (ppm) Monocyclic aromatic hydrocarbons benzene 3.42 0.08 toluene 5.28 1.02 Ethylbenzene 42.70 4.43 Total xylene 309.00 20.1 Styrene 3.39 0.27 Polycyclic aromatic hydrocarbons naphthalene 43.71 8.88 Fluorene 0.05 0.05 Phenanthrene 0.10 0.05 Krissen 0.50 0.05 Benzofluoranol 0.05 0.05

As shown in Table 3, by treatment with the paint detackifier of this example, the contents of monocyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons in the paint sludge were greatly reduced. In particular, the contents of naphthalene and toluene before "treatment" were 43.71 ppm and 5.28 ppm, respectively, while the contents of naphthalene and toluene after "treatment" were 8.88 ppm and 1.02 ppm, respectively. The contents of other aromatic compounds such as benzene, ethylbenzene and total xylene were also greatly reduced through the treatment of this example. From these results, it can be seen that by using the paint dedusting agent of the present invention having excellent biodegradability, paint sludge having a very low content of harmful aromatic compounds can be produced. This effect is not expected at all from conventional chemical paint detackifiers.

Comparative Example 1 --- Conventional Chemical Paint Detackifier

In this comparative example, the performance of chemical paint detackifiers using aluminum sulfate and polyacrylamide as coagulants and flocculants, respectively, was evaluated.

First, 500 ml of a paint solution containing 1 part by volume of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water were placed in a 1 liter jar, and then 0.5 g of aluminum sulfate and polyacrylamide were placed in the vessel. 0.05 g was added. The vessel was stirred for 30 minutes and then left to stand for 1 hour, after which the supernatant and paint sludge were separated to evaluate their properties.

Table 4 summarizes the performance evaluation index of the chemical paint viscosity remover of the comparative example and the performance evaluation index of the paint viscosity remover of the present invention of Example 1.

sample Evaluation index item Example 1 Comparative Example 1 Supernatant Exterior Clear supernatant Clear supernatant pH 6.92 7.16 COD (ppm) 3730 4460 BOD (ppm) 673 765 TOC (ppm) 486 723 TN (ppm) 261 129 Permeability (%) 89.24 91.16 Paint sludge Exterior Non-stick precipitate Sticky precipitate Sludge Generation (g / L) 2.06 2.37 TOC (ppm) 2330 2480 TOC (mg / g-dry sludge) 1128 1046 TN (ppm) 757 944

As shown in Table 4, Example 1 shows superior performance compared to Comparative Example 1, especially in terms of water quality and sludge generation amount of the supernatant. The permeability (89.24%) of the supernatant of Example 1 showed a value almost equal to the permeability (91.26) of the supernatant of Comparative Example 1. The COD (3730 ppm) of the supernatant of Example 1 is much lower than the COD (4460 ppm) of the supernatant of Comparative Example 1. In addition, the sludge generation amount (2.06 g / L) of Example 1 is the numerical value which decreased by 12.7% from the sludge generation amount (2.37 g / L) of Comparative Example 1. From these results, it can be seen that the paint detackifier of the present invention comprising a fungal culture has a better performance than conventional chemical paint detackifiers.

Example 2 --- Panerocaete Chrysosporium Cultures

The paint dedusting agent used in this example is a panerecaete chrysosporium culture obtained in Production Example 1 as a mold culture, and "Bio Accelerate 32" is used as an additional nutrient source. In this example, the paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water was treated.

First, 500 ml of the paint solution was placed in a container, and then 10 ml of Panerecaete chrysosporium culture and 10 ml of a 10% by weight aqueous solution of "Bio Accelerate 32" were inoculated into the container. Then, the airtight container was incubated for about 10 days in connection with a respiratory rate meter in a constant temperature water bath at 26 ° C. The treated paint solution was recovered and allowed to stand for 1 hour, and then the properties of the treated paint solution were evaluated, and the results are summarized in Table 5.

Example 3-Panerecathe sorbidae Culture

This example was carried out under the same methods and conditions as in Example 2, except that the Panerecathe sorbidae culture obtained in Preparation Example 2 was used as the fungal culture. The properties of the paint solutions treated in this example are summarized in Table 5.

Example 4 --- Trametis Versicolor Culture

This example was carried out under the same methods and conditions as in Example 2, except that the trametis versicolo culture obtained in Preparation Example 3 was used as the fungal culture. The properties of the paint solutions treated in this example are summarized in Table 5.

Example 5 --- Cunninghamella elegans Culture

This example was carried out under the same methods and conditions as in Example 2 except that the Cunninghamela elegans culture obtained in Preparation Example 4 was used as the fungal culture. The properties of the paint solutions treated in this example are summarized in Table 5.

Example 6- Penicillium sp. G-1 culture

This example is obtained from Penicillium sp. It was carried out under the same methods and conditions as in Example 2 except that G-1 culture was used. The properties of the paint solutions treated in this example are summarized in Table 5.

Table 5 shows the properties of the paint solution treated in Examples 2-6 and the same "uninoculated" paint solution.

sample Exterior COD (ppm) COD Reduction (%) Permeability (%) Final pH Non-vaccinated muddiness 9870 - 25.9 7.57 Example 2 Supernatant and Sediment 7550 23.5 83.9 6.04 Example 3 Supernatant and Sediment 7650 22.5 79.3 6.79 Example 4 Supernatant and Sediment 7310 25.9 76.2 6.89 Example 5 Supernatant and Sediment 5650 42.7 90.2 5.24 Example 6 Supernatant and Sediment 6970 29.4 74.5 6.80

As shown in Table 5, the paint solutions treated in Examples 2 to 6 formed clear supernatants with good permeability of 74.5 to 90.2%, and paint sludge deposits clearly separated therefrom, from 22.5 to 42.7% It shows a reduction in COD. From this, it can be seen that the paint demulsifier of the present invention using a fungal culture exhibits excellent paint descaling effect and excellent organic material biodegradation ability.

Example 7 --- Cunninghamela elegans culture and 5% paint solution

In this example, the Cunninghamela elegans culture was used as a mold culture, and a 5% paint solution containing 5 parts by weight of "WBC-710 6T3 Dark Green Mica" and 95 parts by weight of distilled water was treated.

First, 500 ml of the paint solution was placed in a container, and then 10 ml of the Kerningelella elegans culture and 10 ml of a 10% by weight "Bio Accelerate 32" aqueous solution were inoculated into the container. Then, the airtight container was incubated for 10 days in a constant temperature water bath at 26 ° C. in connection with a respiratory rate meter. The treated paint solution was recovered and allowed to stand for 1 hour, and then the properties of the treated paint solution were evaluated, and the results are summarized in Table 6.

Table 6 shows the properties of the paint solution treated in Example 7, and the same "uninoculated" paint solution.

sample Exterior COD (ppm) COD reduction (%) Permeability (%) pH Non-vaccinated muddiness 42120 - 1.24 7.30 Example 7 Supernatant and Whole Goods 28560 32.2 87.62 7.76

As shown in Table 6, although the 5% paint solution was treated, the paint solution treated in Example 7 formed a clear supernatant showing a good permeability of 87.62%, and a paint sludge precipitate clearly separated therefrom, The COD reduction rate is 32.2%.

In the case of paint booths, the paint concentration of the circulating water is known to be on average about 1%. However, the concentration of the paint in the circulating water may vary with the change in the amount of overspray paint. Therefore, even when the paint concentration is increased, it is preferable that the paint detackifier exerts an excellent paint detackifying effect. As shown in Example 7, the paint detackifier of the present invention exhibits excellent paint dedusting performance and biodegradability even for paint solutions of increased concentration up to 5%. Accordingly, it can be seen that the paint detackifier of the present invention is a very useful paint demulsifier capable of treating paint solutions having a wide range of paint concentrations.

Example 8 100 parts by weight of cheningamella elegans culture: 0 parts by weight of additional nutrient source

In this example, a 1% paint solution containing 1 part by weight of " WBC-710 6T3 Dark Green Mica " and 99 parts by weight of distilled water was used as a fungal culture, without additional nutrients. It was.

First, 500 ml of paint solution was placed in a vessel, and then only 10 ml of Cunninghamela elegans culture was inoculated into the vessel, and 10 wt% aqueous solution of "Bio Accelerate 32" was not added. Then, the airtight container was incubated for 10 days in a constant temperature water bath at 26 ° C. in connection with a respiratory rate meter. The treated paint solution was recovered and allowed to stand for 1 hour, and then the properties of the treated paint solution were evaluated, and the results are summarized in Table 7.

Example 9 100 parts by weight of cheningamella elegans culture: 2 parts by weight of additional nutrient source

In this example, a 1% paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water, using an additional nutrient source and using the Kerninghamella elegans culture as a fungal culture. Was treated.

First, 500 ml of paint solution was placed in a vessel, and then 10 ml of Cunninghamela elegans culture and 2 ml of a 10% by weight "Bio Accelerate 32" aqueous solution were inoculated into the vessel. Then, the sealed container, in a constant temperature water bath at 26 ℃, incubated for 10 days in connection with the respiratory rate meter. After the paint solution thus treated was allowed to stand for 1 hour, the properties of the treated paint solution were evaluated, and the results are summarized in Table 7.

Example 10 100 parts by weight of cheningamella elegans culture: 10 parts by weight of additional source of nutrition

In this example, a 1% paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water, using an additional nutrient source and using the Kerninghamella elegans culture as a fungal culture. Was treated.

First, 500 ml of paint solution was placed in a vessel, and then 10 ml of Corningelella elegans culture and 10 ml of a 10% by weight "Bio Accelerate 32" aqueous solution were inoculated into the vessel. Then, the sealed container, in a constant temperature water bath at 26 ℃, incubated for 10 days in connection with the respiratory rate meter. After the paint solution thus treated was allowed to stand for 1 hour, the properties of the treated paint solution were evaluated, and the results are summarized in Table 7.

Example 11 --- 100 parts by weight of cheningamella elegans culture: 20 parts by weight of additional nutrient source

In this example, a 1% paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water, using an additional nutrient source and using the Kerninghamella elegans culture as a fungal culture. Was treated.

First, 500 ml of the paint solution was placed in a container, and then 10 ml of Corningelella elegans culture and 20 ml of a 10% by weight "Bio Accelerate 32" aqueous solution were inoculated into the container. Then, the sealed container, in a constant temperature water bath at 26 ℃, incubated for 10 days in connection with the respiratory rate meter. After the paint solution thus treated was allowed to stand for 1 hour, the properties of the treated paint solution were evaluated, and the results are summarized in Table 7.

Example 12 100 parts by weight of cheningamella elegans culture: 40 parts by weight of additional nutrient source

In this example, a 1% paint solution containing 1 part by weight of "WBC-710 6T3 Dark Green Mica" and 99 parts by weight of distilled water, using an additional nutrient source and using the Kerninghamella elegans culture as a fungal culture. Was treated.

First, 500 ml of paint solution was placed in a container, and then 10 ml of Corningelella elegans culture and 40 ml of 10% by weight aqueous solution of "Bio Accelerate 32" were inoculated into the container. Then, the sealed container, in a constant temperature water bath at 26 ℃, incubated for 10 days in connection with the respiratory rate meter. After the paint solution thus treated was allowed to stand for 1 hour, the properties of the treated paint solution were evaluated, and the results are summarized in Table 7.

In Table 7, the characteristics of the paint solution treated in Examples 8-12 and the same "non-inoculated" paint solution are shown.

sample Supplements (wt%) COD (ppm) COD reduction (%) Permeability (%) Final pH Non-vaccinated After treatment Example 8 0 9080 8860 2.3 56.5 6.49 Example 9 2 9170 6000 34.5 88.5 5.59 Example 10 10 9300 5580 40.0 85.0 6.62 Example 11 20 9780 7510 23.2 80.9 6.57 Example 12 40 11540 8120 29.6 87.7 7.18

As shown in Table 7, for Example 8, the permeability of the supernatant of the treated paint solution was 56.5% and the COD reduction was 2.3%. From this, it can be seen that the paint detackifier of the present invention can exert the paint dedusting effect and the biodegradation effect without using additional nutrients. Note that the COD reduction rate and permeability no longer increase, even if the amount of additional nutrients exceeds some level. On the other hand, as shown in the results of Example 9, although the content of the additional nutrient is very small, such as 2% by weight, the COD reduction rate and permeability were greatly improved. It can be seen from this that the desired content of additional nutrient is present. For example, the preferred amount of additional nutrient can be from about 2 to about 40 parts by weight, more preferably from about 2 to about 10 parts by weight, based on 100 parts by weight of the fungal culture. Of course, the preferred range of additional nutrients may vary depending on the type of mold and the conditions of use, which are easily found by those skilled in the art.

The paint demulsifier of the present invention comprising a fungal culture not only allows the paint in the circulating water to easily form aggregates, but also allows the aggregates to be easily separated from water without being viscous. In addition, the decomposition of the harmful substances by the biodegradation of the fungal culture is made, the harmful substance content of the aggregate is very low. In addition, the water quality of the circulating water is improved. In addition, since some of the paint components in the circulating water are metabolized and converted into cells or carbon dioxide, the amount of sludge (non-sticky aggregate of paint) can be reduced.

Claims (12)

Paint detackifier comprising fungal cultures. 2. The paint detackifier of claim 1, wherein the fungus is of the genus Panerocaete. 3. The paint detackifier according to claim 2, wherein the fungus of the genus Panerocaete is at least one selected from Panerokate chrysosporium and Panerokate sorbida. The paint detackifier of claim 1, wherein the fungus is of the genus Trametis. 5. The paint detackifier according to claim 4, wherein the fungus of the genus Trametis is Trametis versicolo. 2. The paint detackifier of claim 1, wherein the fungus is of the genus Kerninghamela. 7. The paint detackifier of claim 6, wherein the fungus in the chewing gumela is a chewing gumella elegans. The paint detackifier of claim 1, wherein the mold is of penicillium. The method of claim 8 wherein the fungus in the penicillium is Penicillium sp. Paint viscosity remover, characterized in that G-1. 2. The paint detackifier of claim 1, further comprising an additional nutrient source for promoting further growth of the fungus. 11. The paint detackifier of claim 10, wherein said additional nutrient source comprises a carbon source, a nitrogen source, vitamins and minerals. 11. The paint detackifier according to claim 10, wherein the content of the additional nutrient source in the paint detackifier is 2 to 40 parts by weight based on 100 parts by weight of the fungal culture.

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