JP2003080235A - Material and method for reducing odor of organic waste water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material and method for efficiently and inexpensively reducing odors of waste water containing various kinds of residues and organic matters including, as for a grease-trapper used for organic waste water treatment. SOLUTION: The material comprises mixed and kneaded powder of denucleated Torula yeast, which is a harmless and nontoxic natural material having biodegradability in a range from 85 to 99%, and of synthetic mica containing impurities to a lesser extent and having stable quality in a range from 15 to 1%. The average grain size of the mixed powder is 1 to 150 microns, and the mixed powder is used in conditions of a pH ranging from 5 to 9 and a temperature from 5 to 30 deg.C. The reducing material occupies 0.5 to 15% of inner volume a waste water vessel and reduces organic water odors.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to various types of residual wastewater,
Regarding an odor treatment agent suitable for the treatment of sewage, etc., especially when used in a grease trap device used in the treatment of organic wastewater, it is possible to reduce the odor easily, efficiently and inexpensively, and to reduce the odor of organic wastewater. It relates to a method for reducing the odor of drainage used.

[0002]

2. Description of the Related Art It is legally obligatory to install a grease trap device for the treatment of organic wastewater in commercial kitchens, employee / employee kitchens and the like. There are some examples of using odor reducing materials made of various polymers, polyvalent metal compounds or chlorine compounds to reduce the offensive odor generated from wastewater flowing into this grease trap. Was often included. Since the above-mentioned mitigation materials are generally not biodegradable, there is concern about environmental pollution when the treated water is discharged directly into rivers and lakes. Further, since the residual material of the reducing material is mixed with the solid matter collected in the treatment process, there is a possibility that harmful substances may be discharged even in the case of landfill or incineration treatment.

[0003]

The present invention was created in view of the above circumstances, and its main problem is to use a powdery substance that is harmless, non-toxic, and biodegradable, and is used in the process of treating organic wastewater. To provide an odor reducing material that reduces the odor of the strapping device, does not discharge harmful substances even in the case of landfilling or incineration of the residue, and can suppress the influence of the released water on river lakes. It is in.

[0004]

In order to achieve the above object, in the invention of the odor reducing material according to claim 1, 85% to 80% by weight of the powder of detoxified Torula yeast which is a harmless nontoxic and biodegradable natural material is used.
The technical measure is taken to be 99%, and a powder of synthetic mica with few impurities and stable quality is kneaded and mixed in the range of 15% to 1%. In the invention of claim 2, the above-mentioned natural material, the enucleated torula yeast, takes technical means for selecting a high protein yeast from which various nucleic acids have been removed and extracted in the genus Candida utilis from various yeast groups.

According to a third aspect of the invention, the powder particle size is from 1 to 150 μm, PH is 5 to 9 and temperature is 5 to 50 degrees Celsius.
It is used under operating conditions in the range of 30 ° C., and the technical means is taken such that the amount of the odor reducing material added is 0.5 to 15% of the input tank.

In the invention of the odor reducing method using the odor reducing material of claim 4, the above odor reducing material is put into a grease trap device to reduce the odor of inflow and precipitation. I am taking it.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The odor reducing material used in the grease trap system and the method for reducing the odor of wastewater using the same in the organic wastewater treatment of the present invention will be described below. This odor reducing material is a natural material, in which the powder of denuclearized Torula yeast having biodegradability is 85% to 99%, and synthetic mica is kneaded and mixed in the range of 15% to 1%. In the present invention, the enucleated torula yeast is a high protein yeast (enucleated yeast) obtained by extracting and removing nucleic acids from the torula yeast of the genus Candida utilis, for example, trade name "yeast B" manufactured by Nippon Paper Industries Co., Ltd. The synthetic mica that uses the powder of ”and is miscible is high-purity fluoromica made from talc.
It has the same crystal structure as natural mica and has few impurities. For example, mica manufactured by Corp Chemical Co., Ltd. and a powder of "Somasif" are used. In the kneading and kneading method according to the present invention, powders of enucleated torula yeast and synthetic mica are kneaded and kneaded in a dry state with a mixer or a kneading and kneading machine equipped with a constant quantity feeder. In this case, the ratio is the weight ratio.

[0008] Here, from the yeast group of natural materials, enucleated torula yeast (Candida utilis, nucleic acid extracted and removed) is selected, and talc is used as a raw material to obtain a high-purity fluoromica synthetic product. It is used by kneading and mixing. The powder particle size is preferably in the range of 1 to 150 μ, and is used in the range of PH of 5 to 9 and temperature of 5 to 30 ° C.

The odor reducing material thus kneaded and kneaded is
"Air Conditioning and Sanitary Engineering Society Standard HASS-217-199
It is put into the waste water of the grease trap device installed according to the allowable inflow flow rate and the standard intercepting grease amount shown in "1". The grease trap device shown in FIG. 1 has an inflow port 1 on the upstream side of the input layer T, and the waste water that has flowed in traps food residues in the basket 2 and then traps the waste water and the grease contained in the waste water. This is a system in which the partition plates 3, 4 and 5 block the waste water, and the waste water is discharged to the trap pipe 6 on the downstream side of the charging tank T. The volume of the charging tank T has been commercialized over various specifications depending on the amount of inflow and the amount of processing, and at present, a relatively large number of grease trap devices equipped with the charging tank T having a capacity of 60 to 3000 liters are manufactured or installed. Most of the devices adopt the same method as that shown in FIG. 1, regardless of the capacity.

The pH value of the wastewater of these grease trap devices varies from 5 to 9 and the temperature varies in the range of 5 to 30 ° C. depending on the seasonal change and the temperature of the inflowing wastewater. Into the waste water of the basket 2 of T or the partition plate 3, the above-mentioned powdery organic matter drainage odor reducing material having an average particle size of 1 to 150 μ is charged in an amount of 0.5 to 15 times the volume of the target charging tank T. Input so that it is in the range of%. The mechanism of odor reduction is due to the redox property of the phenolic structure of lignin contained in enucleated torula yeast due to its huge molecular structure (lignin sulfonic acid) and the intercalation (substitution ability) retained by synthetic mica.

Examples using the odor reducing material will be described below. [Example] As the odor reducing material, a kneaded and kneaded product composed of 99% of denuclearized Torula yeast and 1% of synthetic mica was used. The enucleated torula yeast used was a product name "Yeast B" manufactured by Nippon Paper Industries Co., Ltd., and the synthetic mica used was a product name "Somasif" manufactured by Coop Chemical Co., Ltd. For kitchen wastewater whose solid-liquid component consists of 98% water, the above mitigating material was put into a grease trap (volume specification of the input tank T of 100 liters) with an inflow rate of 100 liters / day and denuclearized Torula yeast (99%). Synthetic mica (1
%) 500 g (0.5% of the volume of the charging tank T) of the kneading-mixing odor reducing material was added to the drainage in a powder form. The drainage temperature was 25 ° C and the inflow PH was 6. After the lapse of 10 days from the introduction, a considerable amount of unpleasant odor such as ammonia was felt from the grease trap and the piping around it. However, after the lapse of 10 days from the introduction, the odor from the grease trap and its surroundings can be reduced, and the residual gas in the grease trap remains. The reduction of oil content was observed. This is a huge molecular structure (lignin sulfonic acid) with a structure made of lignin phenol contained in enucleated torula yeast.
It is the result that the redox property and the intercalation (substitution ability) of synthetic mica were exhibited. The ratio of enucleated torula yeast and synthetic mica is set to 1 to 15%, but in the case of 1 to 5%, 100 liters (daily dose) 5 to 10%, 100 to 500 liters (daily dose) 10 In the case of 15%, it is used in the range of 500 to 3000 liters (daily dose). This is because the inflow rate is fast, and the probability that the input amount stays in the wastewater decreases, and the original effect may not be exhibited in some cases. When the oil content (especially cup instant noodles) contained in the wastewater is 0.3 liters or more per day, it is necessary to decompose the odor generated from the oil content and the oil content attached to the drain trap. By increasing the input amount, the redox capacity and the substitution action of the odor reducing material can be promptly exerted, so that the odor reducing material can be used in accordance with the requirements of the user.

In the above examples, the panel test results were obtained that the odor and the drainage color are superior to the odor reduction obtained by the conventional method.

The results are shown in [Table 1]. (15 panelists)

[0013]

As described above, the odor reducing material of the present invention is
It uses a kneaded mixture of enucleated yeast powder and synthetic mica powder, which is a natural material and has biodegradability, so it is easy to handle and can be provided at low cost, as well as large-scale improvements necessary for using it. Does not need In addition, since it has biodegradability, it does not emit harmful substances even when the residue is landfilled or incinerated, and there is little concern about secondary pollution such as rivers and lakes due to discharge. Furthermore, since the fertilizer component held by the enucleated yeast is mixed in the residue, it can be circulated in fields and the like, which is an extremely useful odor reducing material and odor reducing method.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of an organic wastewater treatment apparatus for kitchen wastewater using an odor reducing material.

[Explanation of symbols]

1 Inlet 2 baskets (for capturing residual material) 3 partition boards 4 partition boards 5 partition boards 6 Trap tube (outlet)

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 500497766             Yamadajima Tokikata             1322-44-334 I, Kakushi-cho, Gotsu City, Shimane Prefecture (72) Inventor Yasuhiro Deguchi             472-1, Yamashiro-cho, Matsue-shi, Shimane Prefecture (72) Inventor Yamadajima Tokikata             Shimane Prefecture Gotsu City Kakushi Town I 1322 44 F-term (reference) 4C080 AA05 AA07 BB02 CC08 CC14                       HH05 JJ04 KK08 LL02 MM02                       MM33

Claims (4)

[Claims] 1. Reduction of odor of organic wastewater, characterized in that enucleated torula yeast is used as a main material of 85% to 99%, and synthetic mica is kneaded and mixed in a range of 15% to 1% to form a powder. Material. 2. A powder of high-protein yeast (enucleated yeast) obtained by extracting and removing nucleic acid from torula yeast of the genus Candida utilis, which is used as the synthetic mica to be mixed, is talc. A high-purity fluoromica produced by using as a raw material, a powder having the same crystal structure as natural mica and containing a small amount of impurities is used. 3. A powder having an average particle size of 1 to 150 μm is used,
It is used under conditions of use in the range of pH 5 to 9 and temperature 5 to 30 ° C, and the amount of the reducing material added is 0.5 of the volume of the input layer.
The material for reducing the odor of organic wastewater according to claim 1 or 2, which is composed of -15%. 4. An organic wastewater characterized in that the odor reducing material according to any one of claims 1 to 3 is put into the wastewater of a grease trap device for organic wastewater treatment to reduce the offensive odor generated from the equipment. How to reduce odor.