WO2007119732A1

WO2007119732A1 - Float for treating oily sewage and method of treating oily sewage

Info

Publication number: WO2007119732A1
Application number: PCT/JP2007/057946
Authority: WO
Inventors: Kikuko Matsumura
Original assignee: Yukihakko. Co., Ltd.
Priority date: 2006-04-13
Filing date: 2007-04-11
Publication date: 2007-10-25

Abstract

In treating oily sewage pooled in a grease trap (2), a float for treating oily sewage (1), which has a housing (15) made of a natural air-permeable material and a microorganism carrier (12) packed in the housing and made of a porous material carrying an aerobic bacterium and an anaerobic bacterium, is floated on the water surface in such a manner as to form an air-contact face wherein the float is in contact with the outside air. Thus, an aerobic environment is provided in the housing at least by the outside air incorporated via the air-contact face and the microorganism carrier and the decomposition of the oily sewage is promoted by the aerobic bacterium based on the aerobic environment thus established. Owing to the decomposition by the aerobic bacterium, an anaerobic environment is provided in the housing and then the decomposition of the oily sewage is promoted by the anaerobic bacterium based on the anaerobic environment thus established.

Description

Specification

Oily sewage treatment floating body and oily sewage treatment method

Technical field

TECHNICAL FIELD [0001] The present invention relates to an oily sewage treatment floating body and an oily sewage treatment method, and more particularly to an oily sewage treatment floating body and an oily sewage treatment method suitable for treating oily sewage retained in a septic tank.

Background art

[0002] According to the Sewerage Law, food and beverage companies are obligated to install a septic tank, generally called a grease wrap. Sewage containing fats and oils flows into the septic tank, and the fats and sludge in the waste cooking oil collected in the septic tank stays in the septic tank, and the remaining sewage is drained through a trap pipe. Oils and fats etc. staying on the surface of the septic tank will decay with the activity of anaerobic bacteria over time. Ammonia and hydrogen sulfide, which are degradable organisms of fats and oils, can cause odor. Thus, if the sludge in the septic tank is left as it is, the environment in the kitchen is deteriorated, which can be a serious problem in terms of hygiene.

[0003] For this reason, conventionally, the sludge in the septic tank has been periodically drawn manually and discarded. However, there is a problem in that the labor of the workers accompanying such disposal is excessive, and the costs associated with this increase.

[0004] In order to solve such problems, there has been proposed a processing apparatus for processing waste oil in grease traps using microorganisms (see, for example, Patent Documents 1 and 2). All of the proposed processing apparatuses use aerobic microorganisms for decomposing waste oils and fats, and are equipped with a bag aeration unit that enhances the activity of such aerobic microorganisms.

[0005] In addition, a sewage treatment container in which an aerobic microorganism (sewage treatment inoculum) is enclosed in a bag in which a lipophilic and porous foam sheet is processed has been proposed (see, for example, Patent Document 3). ). A plurality of small holes are provided on the surface of the sewage treatment container, and the sewage enters from there. At this time, the aeration by the aeration unit that efficiently suppresses offensive odor and decomposes the waste oil / fat may be performed at the same time.

Patent Document 1: JP 2000-325938 Patent Document 2: JP 2002-86173 A

Patent Document 3: Japanese Patent Laid-Open No. 2000-355634

Disclosure of the invention

Problems to be solved by the invention

[0006] However, since the aeration unit for performing such aeration at the same time is disposed, there is a problem that the cost is increased and the installation place must be secured.

[0007] That is, it effectively promotes the decomposition of oily sewage by aerobic bacteria without performing aeration.

Therefore, an oily sewage treatment method that can further improve the purification degree in the grease trap has been desired.

[0008] Therefore, the present invention has been devised in view of the above-mentioned problems, and its object is to effectively purify and deodorize oily sewage without using an aeration unit. Means for Solving the Problems in Providing a Floating Body for Oily Sewage Treatment and an Oily Sewage Treatment Method

[0009] In order to solve the above-mentioned problem, the present inventor is an oily sewage in which a package made of a porous material carrying an aerobic bacterium and an anaerobic bacterium is filled in an exterior body made of a natural breathable material. A processing float was invented.

That is, an oily sewage treatment floating body to which the present invention is applied includes an exterior body made of a natural breathable material, a filler filled in the exterior body, and an aerobic bacterium included in the exterior body. And an anaerobic bacterium, and a microbial carrier made of a porous material for supporting the aerobic bacterium and the microorganism containing the anaerobic bacterium, the exterior body is coconut fiber, and the filler is sawdust. The microbial carrier is charcoal.

[ooii] Further, it is desirable that an oil-degradable enzyme is further adsorbed on the outer package and the Z or microbial carrier.

[0012] That is, an oily sewage treatment method to which the present invention is applied is an oily sewage treatment method for treating oily sewage retained in a treatment tank. An aerobic environment is created inside the exterior body by at least the external air taken from the air contact surface and the microbial carrier. Start out.

The invention's effect

[0013] An air contact surface that contacts external air is formed in a floating body for oily sewage treatment in which a microbial carrier made of a porous material carrying an aerobic bacterium and an anaerobic bacterium in an exterior made of a natural breathable material. The aerobic environment is created inside the exterior body by the external air and the microbial carrier taken at least from the air contact surface, and is aerobic by the aerobic bacteria based on the aerobic environment created. It promotes the degradation of oily sewage, reduces the dissolved oxygen in the sewage due to the activity of aerobic bacteria, creates an anaerobic environment in the inundation part of the body, and based on this created anaerobic environment oily sewage by anaerobic bacteria Promotes decomposition.

[0014] By filling the exterior body with a porous microbial carrier, the floating body can be appropriately given buoyancy and can remain on the water surface for a long period of time. Furthermore, since the bulge can be formed in the center of the floating body, the contact surface between the floating body and the air is amplified, and an aerobic environment can be secured. In addition, the filler can be expected to have microorganisms settled, decompose fats and oils in the filler, remove malodor, and adsorb fats and oils on the surface of sewage.

[0015] In the present invention, aerobic bacteria and anaerobic bacteria are allowed to act simultaneously and continuously to effectively purify and deodorize oily sewage without aeration using conventional aeration units. Therefore, it is possible to reduce the cost of the entire system.

[0016] The fats and oils floating on the water surface are secreted by microorganisms carried inside the floating body or decomposed into glycerin and fatty acids by a hydrolase such as lipase contained inside the floating body.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, as the best mode for carrying out the present invention, an oily sewage treatment floating body for treating oily sewage retained in a septic tank will be described in detail with reference to the drawings.

FIG. 1 (a) is a perspective view showing a configuration of a floating body 1 for oily sewage treatment to which the present invention is applied.

FIG. 1 (b) is a diagram showing a cross-sectional configuration of the oily sewage treatment floating body 1. FIG. This oily sewage treatment floating body 1 includes an exterior body 11 made of a natural breathable material and a microbial carrier 12 filled in the exterior body 11. The outer periphery of the outer body 11 is sewn with a stopper 13. It's a meeting.

[0019] The exterior body 11 is an environment-friendly material that uses a naturally-occurring breathable material as it is, and is composed of living organisms that exist in nature, such as coconut shell fibers. It is desirable that the outer body 11 be made of hemp, bamboo, carbon fiber, or the like (for example, natural fibers that are animal fibers such as cotton, hemp, silkworm, bamboo fiber, plant fiber, wool, silk, etc.).

[0020] The breathable material constituting the exterior body 11 has a gap through which air can pass. The exterior body 11 can float on oily sewage in the septic tank, and is molded into an optimal shape and size according to the size in the septic tank. In the following example, an explanation will be given by taking as an example the case where the outer casing 11 is formed in a substantially square shape by folding a coconut fiber having a width of about 25 cm, a length of about 50 cm, and a thickness of 7 mm.

[0021] By the way, when the exterior material 11 is suspended in a grease strap 2 as shown in FIG. 2, for example, an air contact surface 15 that comes into contact with external air is formed and immersed in oily sewage. A sewage contact surface 16 is formed. External air is taken into the exterior body 11 through the air contact surface 15, and oily sewage in the grease trap 2 can enter through the sewage contact surface 16.

[0022] Incidentally, it is desirable that the surface of the exterior body 11 is subjected to an oleophilic and / or oil-absorbing treatment so as to be easily adapted to oily sewage.

[0023] Further, the exterior body 11 may be subjected to water repellent treatment on the surface of the veg to enhance the buoyancy of the oily sewage treatment floating body 1. This makes it possible to adjust the floatability on the surface of the oily sewage, and consequently, the force S to adjust the area ratio between the air contact surface 15 and the sewage contact surface 16 becomes possible. For such a water repellent treatment, any conventional means of water repellent treatment may be used.

[0024] The stopper 13 is used to fix the periphery of the exterior body 11 so that the microbial carrier 12 is not released from the exterior body 11 during the oily sewage treatment. For example, hemp ¾: octopus yarn Etc. It is desirable that the material constituting the stopper 13 is made of natural materials that are environmentally friendly. Incidentally, in the example shown in FIG. 1, the entire periphery of the outer package 11 is fixed with the stopper 13, but the present invention is not limited to this, depending on the shape of the outer package 11 and the type of the microbial carrier 12. The number of copies and the fastening position may be changed as appropriate. [0025] The microbial carrier 12 is made of a porous material capable of supporting air. The microorganism carrier 12 is filled in the outer package 11 from the viewpoint of promoting the growth and proliferation of microorganisms. The porous material constituting the microbial support 12 should be composed of a natural material having such properties from the viewpoint of considering the environment at the time of disposal and providing a favorable breeding place for microorganisms. Is desirable. As the porous material constituting the microbial carrier 12, for example, power S waste, extinguisher, wood chip pieces, Bincho charcoal, carbon fiber, etc. (sawdust, charcoal, porous stone, porous lava) are applied.

[0026] Incidentally, it is possible to improve the deodorizing action of the entire oily sewage treatment floating body 1.

In addition, the microbial carrier 12 is lightweight and has appropriate pores. When the microbe carrier 12 is placed and sealed inside the outer package 11, a bulge is formed in the center of the floating body, so that the inside of the floating body takes in air. be able to.

[0027] The microorganism supported on the porous material constituting the microorganism carrier 12 is composed of a combination of aerobic bacteria and anaerobic bacteria. These microorganisms are retained in the pores of the porous material, so many of them will not flow out during use.

[0028] These microorganisms are aerobic bacteria and anaerobic bacteria, which are species belonging to or mutated species belonging to bacteria, fungi, actinomycetes, etc. having the ability to fermentatively decompose waste edible fats and oils contained in oily sewage. Good. These optimal combinations of aerobic bacteria and anaerobic bacteria may be combined one by one or a plurality of combinations. BFT agent may be used.

[0029] The oily sewage treatment floating body 1 having the above-described configuration has a high porosity in the exterior body 11 itself, and also has a high porosity in the microbial carrier 12 filled therein. Air can be contained in the gap between the microbial carrier 12 and the microbial carrier 12, and an appropriate gap exists. Moreover, each material constituting the oily sewage treatment floating body 1 is made of a light material. For this reason, the porosity of the entire floating body for oily sewage treatment 1 becomes extremely high, and can be easily suspended on the oily sewage.

[0030] Next, a method for treating oily sewage by the oily sewage treatment float 1 to which the present invention is applied will be described.

[0031] First, an oily sewage treatment floating body 1 having the above-described configuration is applied to a grease trap as shown in FIG. Float in oily sewage stopped at 2. This grease strap 2 temporarily stops the wastewater that flows from commercial kitchens such as food factories and restaurants through pipe 3, and purifies it before flowing it into sewage through pipe 4. This is a so-called septic tank. The oily sewage retained in this grist wrap 2 is water containing waste cooking oil composed of, for example, animal fats, vegetable fats and mineral oils.

[0032] The floating body for oily sewage treatment 1 floats in the oily sewage retained in the grease strap 2, and as a result, external air is taken in from the air contact surface 15 formed and oily from the sewage contact surface 16 formed. Sewage will enter.

[0033] At this time, the air taken in through the air contact surface 15, the air held in the microbial carrier 12, and the air in the gap between the outer package 11 and the microbial carrier 12 are favorable. A spiritual environment will be formed. In this aerobic environment, among the microorganisms supported in the microorganism carrier 12, the activity of aerobic bacteria and the like can be promoted in particular, and the fats and oils in oily wastewater are decomposed by aerobic bacteria and the like. As a result, oily sewage in grease strap 2 is purified. By the way, this aerobic bacterium is most accelerated at a water temperature of about 38 ° C, but oily sewage flowing from the restaurant kitchen is generally 38-40 ° C. Powerful action is not hindered by water temperature

[0034] When an oil-degrading enzyme is added, fats and oils are degraded to low molecular weight glycerin and fatty acid at an early stage by the enzyme, and the microorganism further degrades glycerin and fatty acid, which are degradable organisms. Therefore, the decomposition time of fats and oils is shortened.

[0035] Further, as the activity by the aerobic bacteria is promoted, when the air inside the outer package 11 and thus the air held by the microorganism carrier 12 is consumed, the inside of the outer package 11 (the inside of the microorganism carrier 12) The dissolved oxygen in the flooded part of the water will be reduced and an anaerobic environment will be created. In this anaerobic environment, the activity of anaerobic bacteria among the microorganisms carried in the microorganism carrier 12 can be promoted. As a result, the fats and oils in the oily sewage are decomposed by anaerobic bacteria, and the purification of the oily sewage in the grease trap 2 is further promoted. That is, by decomposing both aerobic bacteria and anaerobic bacteria inside the exterior body, it is possible to increase the decomposing power of each. [0036] Thus, the present invention uses an aeration unit as in the prior art by causing aerobic bacteria and facultative anaerobic bacteria to act simultaneously and continuously causing these bacteria and obligate anaerobic bacteria to act. It is possible to effectively purify and deodorize the oily sewage in the grease trap 2 without being exposed to air. In particular, in the present invention, by adopting a configuration that actively takes in external air, the emphasis is placed on the point of efficiently activating aerobic bacteria and the like, and the obligate anaerobic bacteria are effective in purifying aerobic bacteria. Based on the anaerobic environment obtained by the above, it will be decomposed naturally. Therefore, even if a configuration for contributing to the activation of the obligate anaerobic bacterium is not provided, it is possible to effectively activate the obligate anaerobic bacterium. In other words, obligate anaerobic bacteria can be activated based on the degradation activity of aerobic bacteria.

[0037] Actually, sawdust is sandwiched between the above-described substantially square-shaped exterior body 11 made of coconut fiber fibers, and the periphery of the exterior body 11 is fastened with a stopper 13 made of hemp thread, and this is retained on the grease strap 2 Left floating in oily sewage. After observing the state of wastewater purification, one week after the flotation start date, among the fats and oils floating on the surface of oily sewage, the amount of animal and vegetable oil contained in the grease trap is 73000 mg / L in terms of n-hexane extract amount. On the other hand, at the grease trap outlet, it was 89 mg / L. That is, the animal and vegetable oil inside the grease trap is decomposed by the oily sewage treatment floating body 1 and is almost purified before reaching the grease strap outlet. Similarly, after 2 weeks, the amount of animal and vegetable oil contained in the grease trap is 190000 mg / L in terms of n-hexane extract, whereas at the grease strap outlet, it is 93 mg / L. It was. This is because the oily sewage treatment floating body 1 is floated on the grease lanps, so that the oily sewage can be made almost transparent. After 5 to 8 hours, it almost disappeared.

[0038] In this respect, in the present invention in which an aerobic bacterium and an anaerobic bacterium act in conjunction with each other, compared to the conventional method of increasing the degradation action of an aerobic bacterium by aeration, 5 hours to 8 hours This makes it possible to make oily sewage transparent, and it is possible to accelerate the purification rate.

[0039] Incidentally, the oily sewage treatment floating body 1 needs to be replaced within a few weeks after the oily sewage is purified. However, this oily sewage treatment float 1 is made of natural materials. Therefore, even when this is treated, it can be disposed of as a combustible material, so that a more environmentally friendly configuration can be achieved.

[0040] It should be noted that the oily sewage treatment floating body 1 to which the present invention is applied may be made to adsorb aerobic bacteria and anaerobic bacteria to the microorganism carrier 12, which is not limited to the above-described embodiment. Les. This makes it possible to further improve the purification and deodorizing effect of oily sewage.

[0041] In addition, the outer body 11 and / or the microorganism carrier 12 may further adsorb an enzyme typified by amylase, protease, lipase or the like. That is, the adsorbed enzyme can promote the degradation action of aerobic bacteria and anaerobic bacteria, and can further improve the purification and deodorizing effects of oily sewage.

[0042] The immobilization of these enzymes may be carried out based on a method that has been practically used in the past, and may be adsorbed to either the outer package 11 and / or the microorganism carrier 12, or both. It may be done. When the enzyme is immobilized on the outer package 11, it may be adsorbed on the surface of the outer package 11, or may be adsorbed on the inside thereof. Desirably, the enzyme is adsorbed on the surface where the fats and oils effectively come into contact.

Next, another configuration example of the oily sewage treatment floating body to which the present invention is applied will be described.

FIG. 3 shows a cross-sectional configuration of an oily sewage treatment floating body 7 as another configuration example. This oily sewage treatment floating body 7 includes an exterior body 11 made of a natural air-permeable material, a filler 22 filled in the exterior body 11, an aerobic bacterium and an anaerobic bacterium included in the exterior body, It has a microbe carrier 23 having a porous material force for supporting microorganisms including aerobic bacteria and anaerobic bacteria, and an oil-degrading enzyme sealed inside the outer package. Incidentally, in FIG. 3, the same components and members as those of the above-described embodiment are denoted by the same reference numerals, and the following description is omitted.

[0045] The filler 22 is sawdust, wood chip pieces, rice husk, carbon fiber, peat moss, or the like. The filler 22 may have appropriate pores. The filler 22 may be made of a (floating) light specific gravity material in order to float on water.

[0046] The filler 22 swells in the center of the floating body when it is placed and sealed inside the exterior body 11. By making the glaze, the inside of the floating body can take in air. When creating a bulge in the central part of the floating body, it is necessary to optimize the filling amount, filling density, and filling distribution of the filler 22 into the exterior body 11. Filler 22 has a force to fill the oily sewage treatment floating body to a height of 1 cm with respect to the top surface area of 125 cm ² , or the height is 1/5 with respect to the vertical and horizontal length 1 on the top surface. You may make it fill so that it may become.

[0047] The microbial carrier 23 is made of a porous material capable of supporting air. The microorganism carrier 23 is filled in the outer package 11 from the viewpoint of promoting the growth and proliferation of microorganisms. The porous material composing the microbial support 23 should be composed of natural materials having such properties from the viewpoint of considering the environment at the time of disposal and providing a favorable breeding place for microorganisms. Is desirable. The porous material constituting the microbial carrier 23 is, for example, charcoal (including extinguisher or bincho charcoal) or pumice.

[0048] The aerobic bacteria and anaerobic bacteria included in the outer package 11 may be compressed into a tablet, or may be filled in a filling container 24 such as a capsule. The filling container 24 is water-soluble, and when the floating body 7 for oily sewage treatment is floated on the grease trap 2, it is dissolved by the liquid stored in the inside. As a result, the aerobic bacteria and the anaerobic bacteria filled in the filling container 24 are gradually diffused into the exterior body 11, and in some cases, are diffused to the outside of the exterior body 11.

[0049] Incidentally, it is desirable that these aerobic bacteria and anaerobic bacteria are in a dormant state during production and transportation. In the production stage, dormant cells contained in a powdery or liquid substance may be dispersed and supported on a microorganism carrier. Alternatively, dormant cells contained in a granular, packaged powder or liquid substance may be enclosed inside the outer package together with the microorganism carrier.

[0050] The bacteria used include aerobic Bacillus bacteria such as acetic acid bacteria and Bacillus subtilis (natto), aerobic Syudomonas bacteria, yeasts (Saccharomyces, tolubosis), nitrate bacteria, nitrite bacteria Anaerobic bacteria such as lactic acid bacteria, methane bacteria, iron bacteria, sulfate-reducing bacteria, yeast, anaerobic pseudomonas bacteria, anaerobic Clostridium bacteria, anaerobic Bacillus bacteria, etc. Also good.

[0051] Anaerobic bacteria are obligately anaerobic bacteria that cannot grow in the presence of oxygen. It is divided into facultative anaerobic bacteria whose growth is promoted, but it promotes the decomposition of oily sewage by aerobic bacteria and facultative anaerobic bacteria (hereinafter aerobic bacteria, etc.) based on the above aerobic environment. An anaerobic environment is created inside the exterior body based on decomposition by aerobic bacteria, etc., and the decomposition of oily sewage by obligate anaerobic bacteria is promoted based on the created anaerobic environment.

[0052] The oil-degrading enzyme is typified by a hydrolase, such as lipase, and is packaged by a wrapping band 25 made of paper as shown in the figure. Filled in.

[0053] In the present invention, coconut fiber is used as the outer package 11, sawdust is used as the filler 22, and charcoal is used as the microorganism carrier 23. As a result, the internal sewage can be highly decomposed by floating in the first treatment tank 62.

[0054] Table 1 shows an example of the present invention in which coconut fiber is used as the outer package 11, sawdust is used as the filler 22, and charcoal is used as the microorganism carrier 23, and coconut fiber is used as the outer package 11, and wood chips as the filler 22. For the comparative examples in which pumice was applied as the microbial carrier 23, the results of experiments for decomposing the actual amount of animal and vegetable oil in the grease trap are shown.

[0055] [Table 1]

[0056] In this experiment, each of the present invention example and the comparative example was floated and left in oily sewage retained in a grease trap. Two weeks after the start of floating the oily sewage treatment floating body as an example of the present invention, the amount of animal and vegetable oil to be decomposed was measured via the n-hexane extract amount value. While the xanthine extraction amount was 190000 mg / L, it was 93 mgZL at the grease trap outlet.

In contrast, in the comparative example, one week after the start of floating, the amount of animal and vegetable oil to be decomposed was measured via the n-hexane extract value. The sun extract value was 2000 mg / L, but at the grease trap outlet, it was 250 mg / L. In this comparative example, the amount of n-hexane extracted in the grease trap is smaller than that of the present invention example when the grease trap tank is cleaned in advance. This is because the experiment was started.

[0058] When focusing on the above-described n-hexane extract amount value, in the present invention example, it can be reduced to nearly 0.0005 times the inside of the grease strap at the grease strap outlet, whereas in the comparative example, It is shown that it can only be reduced to about 0.13 times the inside of the grease strap at the strap exit. For this reason, the present invention example can decompose the animal and vegetable oil in the grist lap to a higher degree than the comparative example, so that the oily sewage can be made almost transparent. In addition, it is considered that BOD can be reduced to the same level as n-hexane extract value.

[0059] Thus, by floating Yu oily wastewater treatment floating 1 according to the present invention embodiment to the first treatment tank 62, it is possible to reduce the B_〇_D to about 20 _PP m.

[0060] Incidentally, the oily sewage treatment floating body 1 needs to be replaced within a few weeks after the oily sewage is purified. However, since the oily sewage treatment floating body 1 is made of a natural material, it can be separated and disposed as a combustible material even when the oily wastewater treatment body 1 is treated. .

[0061] The sewage treatment system 5 to which the present invention is applied is not limited to the above-described embodiment. For example, instead of disposing the activated carbon filter 51 in the front stage of the first treatment tank 62, The activated carbon filter 51 may be disposed after the first treatment tank 62. This also makes it possible to reduce BOD to about 20 ppm.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 4 shows a sewage treatment system 7 as a second embodiment of the present invention.

[0063] Next, the action of the oily sewage treatment floating body 7 to which the present invention is applied will be described.

[0064] First, when the floating body 7 for oily sewage treatment is floated on the grease wrap 2, the aerobic bacteria and anaerobic bacteria in the filling container 24 diffuse to the outside as described above. As a result, some of these aerobic bacteria and anaerobic bacteria are retained in the pores of the porous material as the microorganism carrier 23.

[0065] In addition, when the bulge is created in the center of the floating body by optimizing the filling amount, packing density, and filling distribution of the filler 22 filled in the floating body 7 for oily sewage treatment, Floating body 7 can have moderate buoyancy and can stay on the water for a long time. it can. In addition, since the center of the floating body can bulge, the contact area between the floating body and air can be increased, and a suitable aerobic environment can be created when aerobic bacteria are active.

[0066] Further, the filler 22 is made of sawdust and the like, and the exterior body 11 is filled in a large amount, thereby increasing the contact area with the oily sewage, and consequently the adsorption surface of the oil contained in the filler. It is possible to increase the product itself. As a result, after the floating body for oily sewage treatment 7 is suspended in the grease trap 2, the oil / fat adsorbing ability of the filler 22 can be improved for a while. That is, with the increase in the oil and fat adsorption capacity of the filler 22, the oily sewage treatment floating body 7 is floated in the grease wrap 2 so that the oil and fat in the oily sewage around it enters the outer casing 11. Can improve the absorption capacity. Further, if fats and oils can be adsorbed to the filler 22, odors can be adsorbed in the same manner, thereby contributing to the removal of bad odors in the grease strap 2.

[0067] Next, the enzyme hydrolyzes the fats and oils that have flowed in a large amount into the outer package 11 into glycerin and fatty acids. Incidentally, even when the enzyme flows out of the exterior body 11, the oil and fat floating outside the exterior body 11 can be sequentially decomposed.

[0068] Fats and oils (including decomposed glycerin and low-molecular organic substances containing fatty acids) are decomposed to carbon dioxide and the like by the microorganisms containing the aerobic bacteria and the anaerobic bacteria. In addition, malodorous components such as hydrogen sulfide and ammonia are decomposed by aerobic bacteria into hydrogen, sulfur and nitric acid, respectively, and nitric acid is decomposed into nitrogen by anaerobic bacteria.

That is, in the aerobic bacterium, the organic compound is sequentially decomposed based on the process exemplified by the following chemical formula.

Organic compounds, H, ○, N, S, P, etc.) +0 + H 0 → CO + H 0 + SO + PO

2H S + 2S → 2H + 2S

NH → NO → NO → NO

In anaerobic bacteria, organic compounds are sequentially decomposed based on the process exemplified by the following chemical formula.

Organic compounds (., 0, 3 etc.) + H → CH + CO + H + NH + S

NO— → NO— → NO → N 0 → N [0070] For example, an anaerobic methane bacterium decomposes lower fatty acids into methane and carbon dioxide.

[0071] Of the fatty acids, saturated fatty acids become cloudy precipitates and cause clogging of the septic tank drain pipe, and fats and oils-degrading organisms such as ammonia and hydrogen sulfide also cause malodor, but the microorganisms decompose the fatty acids. , Both bad odor and sediment can be eliminated. Undegraded fatty acid is also adsorbed to the floating body, so it can be taken out of the tank together with the floating body.

[0072] Therefore, the oils and fats retained in the septic tank are decomposed into water-soluble groups by microorganisms, so that the removal work is not necessary. Moreover, since malodorous components are similarly decomposed into non-malodorous components, it is possible to prevent environmental degradation such as kitchens.

[0073] It should be noted that since the filling amount, filling density, and filling distribution of the filler 22 are optimized as described above, a bulge is created at the center of the floating body. As a result, air is actively taken into the exterior body 11 from the outside. Further, by configuring the filler 22 with sawdust or the like, it becomes possible to create a large number of gaps between the fillers 22 and to hold air in the gaps. In some cases, it is possible to retain air even inside the microorganism carrier 23. As a result, it is possible to create an aerobic environment inside the outer package 11.

[0074] As a result, it is possible to further decompose the degradation product produced by the enzymatic degradation with the aerobic bacteria suitable for the created aerobic environment. It is also possible to create an anaerobic environment inside the exterior body based on the degradation by the aerobic bacteria, and promote the degradation of the degradable organisms by the anaerobic bacteria suitable for the created anaerobic environment.

Incidentally, here, the aerobic bacteria and the anaerobic bacteria are not limited to those filled in the filling container 24 in advance, but are aerobic bacteria existing in the grease strap 2, It is intended to include anaerobic bacteria.

Brief Description of Drawings

FIG. 1 is a diagram showing a configuration of an oily sewage treatment floating body to which the present invention is applied.

[Fig.2] When floating float for oily sewage treatment to which the present invention is applied in a grease trap FIG.

FIG. 3 is a diagram showing another configuration example of a floating body for oily sewage treatment. Explanation of symbols

1 Oily wastewater treatment float

2 Grease strap

3 tubes

11 Exterior body

12 Microbial carrier

13 Stopper

15 Air contact surface

16 Sewage contact surface

Claims

The scope of the claims

[1] an exterior body made of a natural breathable material;

A filler filled in the exterior body;

Aerobic bacteria and anaerobic bacteria included in the exterior body,

A microbial carrier comprising a porous material for supporting the aerobic bacteria and the microorganisms containing the anaerobic bacteria,

The exterior body is coconut fiber,

The filler is sawdust,

The microbial carrier is charcoal

A floating body for oily sewage treatment.

[2] The floating body for oily sewage treatment according to [1], wherein an oil-degradable enzyme is further enclosed in the exterior body.

[3] Oily sewage treatment method for treating oily sewage stopped in the treatment tank,

The floating body for oily sewage treatment according to claim 1 is floated on the oily sewage surface so that an air contact surface in contact with external air is formed,

At least external air taken from the air contact surface and the microbial carrier create an aerobic environment inside the exterior body, and promote decomposition of oily sewage by the aerobic bacteria based on the created aerobic environment. ,

Create an anaerobic environment inside the exterior body based on the degradation by the aerobic bacteria, and promote the degradation of oily sewage by the anaerobic bacteria based on the created anaerobic environment.

A method for treating oily sewage.

[4] In the oily sewage treatment method for treating oily sewage stopped in the treatment tank,

The floating body for oily sewage treatment described in item 2 is floated on the oily sewage surface so that an air contact surface that contacts external air is formed.

Decompose at least the oils and fats floating near the water surface with the above enzymes,

An aerobic environment is created in the exterior body by at least the external air taken in from the air contact surface and the microbial carrier and / or the filler, and is separated by the enzyme. The degradation product produced by the solution is further degraded by the aerobic bacteria suitable for the created aerobic environment,

An anaerobic environment is created inside the exterior body based on the degradation by the aerobic bacteria, and the degradation of the degradable organisms is promoted by the anaerobic bacteria suitable for the created anaerobic environment.

A method for treating oily sewage.

Adsorbing the oil and fat floating near the water surface with the filler

The oily sewage treatment method according to claim 3 or 4.