JP3505599B2 - Wastewater treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment device for inflowing wastewater containing oil and fat.

[0002]

2. Description of the Related Art Sewage discharged from kitchens such as restaurants contains high-concentration fats and oils. A grease trap used as a processing device in the wastewater into the tank is used as a grease trap over time. It is practiced to suspend the components and periodically lift the lid from above to collect the floating oil and fat components into a container. In recent years, it has also been attempted to actively take in microorganisms into a tank to naturally decompose fats and oils.

[0003]

[Problems to be Solved by the Invention] It is very troublesome to lift the lid from the upper side and to collect the floating oil and fat in the tank on a regular basis, and it becomes a pollution problem if it is forgotten. Microbial treatment is a hassle-free process, but due to excessive influx of sewage, microorganisms may be washed away and proper reproduction may be hindered, resulting in inefficient purification. Is.

[0004]

The present invention relates to an improvement of the latter device using microorganisms, which is characterized in that a partition wall is erected in the tank, and a sewage inflow chamber, It is divided into a fat and oil floating chamber and a purified water take-out chamber, and each chamber is in a state in which they communicate with each other at the tank bottom. A water flow generation pipe for floating floating oil and fat, and a trap for taking out purified water in the water purification chamber are provided, and an inflow receiver for floating oil and fat is provided in the upper part of the oil and fat floating chamber. The L-shaped, U-shaped, or R-shaped arrangement is provided on the inner peripheral side of the minute floating chamber, and a plurality of beak holes facing the inside of the tank through branch pipes are provided at appropriate intervals on each side. The bottom of the inflow receiver communicates with the pump installed inside or outside the tank via a conduit, The floating grease flowing occupies made shall be circulated between the water flow generating tube. At this time, the height of the floating oil and fat flowing into the inflow receiver may be changed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical sectional side view of a device of the present invention.
FIG. 2 is a plan view of the same. In each figure, 1 is the tank body, 2a
Reference numerals 2b and 2b denote partition walls mounted vertically in the tank so that they can communicate with each other with a certain gap between the tank bottom and the tank bottom. It is supposed to be divided into a minute floating chamber B and a purified water extraction chamber C. Reference numeral 3 is a basket for collecting foreign matters arranged in the dirty water inflow chamber A, and 4 is a water flow generation pipe for flowing floating oil and fats, which is arranged in the oil and fat floating chamber B. It will be arranged.

In the illustrated example, the water flow generating pipe 4 is shown as being formed on the L-shaped side so as to be aligned with the width direction and the length direction in the tank.
It may be formed in a U shape or a square shape. In addition, on each side, at least a beak hole 5 for ejecting a circulating liquid, which will be described later, is provided toward the inside of the tank at appropriate intervals through a branch pipe 4 '.

Reference numeral 6 denotes an inflow receiver for floating oil and fat provided in the floating chamber B for floating oil and fat, which is provided at one corner in the tank 1 in the illustrated example. It may be provided at a location n or the like.

Reference numeral 7 denotes an underwater pump provided at the bottom of the purified water take-out chamber C, which is connected to the bottom of the floating oil and fat inflow receiver 6 through a conduit 8 and is operated by the submersible pump 7. The floating oil and fat flowing into the inside 6 is sucked from the bottom of the inflow receiver 6 through the conduit 8, and is sent from the discharge port 9 to the water flow generating pipe 4 and is jetted from the spout hole 5. In the drawing, 10 is a trap for taking out purified water.

The above is an example in which the floating oil and fat in the tank is recirculated by the submersible pump 7 installed in the tank, but FIGS. 3 and 4 show the circulation pump 7'installed outside the tank. It can be recirculated through, and can be arbitrarily adopted according to the space conditions at the installation location.

In the present invention, the spout hole 5 can be directly formed at an appropriate interval position with respect to the length direction or the width direction of the water flow generation tube 4 in the tank, but as shown in the illustrated example. It is preferable to attach a branch pipe 4 ′ having a constant length downward and to eject the branch pipe 4 ′ through the branch pipe 4 ′. The reason for this is that in order to improve the efficiency of oil collection according to the results of many studies conducted by the present inventors, it is preferable to arrange the water level so that it is about several cm higher than the water level. Since the difference is different, in the case where the injection hole 5 is provided through the branch pipe 4'as described above, the branch pipe 4'can be replaced with an appropriately dimensioned length or its length can be easily adjusted. As a result, it is also excellent in changing the injection direction of the injection hole 5. In general, good results are obtained when the tip of the ejection port is opened like a fan.

FIG. 5 shows an example of the structure of the floating oil and fat inflow receiver 6, where A is a plan view and B is a sectional view. In the illustrated example, the peripheral wall surface has a double structure of an inner wall 6a and an outer wall 6b in order to allow suitable inflow with respect to the fluctuation of the water level, and the outer wall 6b is slit 11 with respect to the inner wall 6a.
The height position of the inflow edge p can be changed by appropriately moving up and down by using the or the thumbscrew 12. It should be noted that a swirling water flow is generated during operation at a position above the conduit 8 at the bottom of the inflow receiver 6, which causes a large noise of the air attracted at the center of the swirling water flow. To do so, the sound deadening plate 13 is installed on the bottom surface. In the illustrated example, a cross-shaped frame plate is used. In the figure, 14 is a weir plate provided on the bottom of the tank, and 15 is a sewage inflow pipe.

[0012] Next, the operation will be described. In the wastewater flowing in from the wastewater inflow pipe 15, foreign matters and rough dust are collected by the blocking cage 3 in the chamber A. Thus, the oil passes through the lower end of the weir plate 2a and flows toward the chamber B, and the fat and oil in the wastewater floats upward in this portion.

By the way, the floating oil and fat flows into the inflow receiver 6 disposed at a fixed height position above the oil and fat. At this time, the oil and fat is contained by the operation of the pump 7 (7 '). While sucking dirty water into the pump from the conduit 8,
It is sent out from the discharge port 9 to the water flow generation pipe 4, and is ejected from the spout hole 5. As a result, a circulation path is formed to allow the floating oil and fat on the upper surface of the tank to efficiently flow into the inflow receiver 6.

In the above, the receiving container 6 or the chamber B is appropriately (about once a day) charged with an appropriate amount of microorganisms such as bacteria, yeasts, etc. Therefore, the above-mentioned fats and oils are contained therein. These microorganisms carry out a mixing and stirring action in the repeated process of circulation, and an efficient decomposition action of fats and oils is carried out.

[0015]

Industrial Applicability As described above, the present invention forms an effective circulation path by the generation of a water flow of floating oils and fats in the tank, and at this time, stirring and mixing with microorganisms such as bacteria and yeasts are always performed efficiently. By doing so, the decomposition treatment of the fat and oil can be progressed very quickly and accurately, and the generation of odor can be reduced, which contributes to the preservation of a better environment than ever before. In addition, the device of the present invention has a structure that saves space corresponding to the installation location, is compact, and is easy to maintain and manage, and can be put on the market at low cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a device of the present invention.

FIG. 2 is the above plan view.

FIG. 3 is a vertical sectional side view of another example.

FIG. 4 is the above plan view.

FIG. 5 shows an inflow receiver, where A is a plan view and B is
Is a vertical sectional view.

[Explanation of symbols]

1 tank body 2a, ab partition wall 3 hindrance basket 4 Water flow generation tube 5 spout hole 6 receiving containers 7,7 'circulation pump 8 conduits 10 traps 15 Sewage inflow pipe

─────────────────────────────────────────────────── --Continued from the front page (56) References Japanese Patent Laid-Open No. 10-219807 (JP, A) Japanese Patent Laid-Open No. 8-332494 (JP, A) Japanese Patent Laid-Open No. 2001-314884 (JP, A) Actual Development Sho-49-87192 (JP, U) Actual development Sho 53-115464 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/00 C02F 1/40 C02F 3/02 C02F 3/12

Claims (2)

(57) [Claims] 1. A sewage inflow chamber, in which a partition wall is erected in the tank,
It is divided into a fat and oil floating chamber and a purified water take-out chamber, and each chamber is in a state in which they communicate with each other at the tank bottom. A water flow generation pipe for floating floating oil and fat, and a trap for taking out purified water in the water purification chamber are provided, and an inflow receiver for floating oil and fat is provided in the upper part of the oil and fat floating chamber. The L-shaped, U-shaped, or R-shaped arrangement is provided on the inner peripheral side of the minute floating chamber, and a plurality of beak holes facing the inside of the tank through branch pipes are provided at appropriate intervals on each side. The bottom of the inflow receiver is connected to a pump provided inside or outside the tank via a conduit, and the floating oil and fat flowing into the inflow receiver is circulated between the water flow generation pipe and the floating oil. Wastewater treatment equipment. 2. The wastewater treatment apparatus according to claim 1, wherein the height of the inflow height of the floating oil and fats with respect to the inflow receiver is changeable.