JP3008287B1 - Wastewater treatment equipment - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To use a microbial fungus to remove fats and oils during sewage treatment,
Provided is a wastewater treatment apparatus that can be economically and efficiently decomposed. SOLUTION: A partition wall is erected in a sewage inflow tank main body, divided into a plurality of chambers, and each chamber is made to communicate with each other at a tank bottom, and at least one of the divided chambers is provided. Has a funnel shape and has an aeration box with a perforated hole formed in the bottom part so that there is a certain gap between it and the inner wall of the tank at a certain height above the bottom of the tank. In addition to ensuring that the fats and oils of the wastewater treatment liquid flow into the aeration box through the above gap from the bottom of the tank, the inside of the aeration box is designed so that microorganisms and fungi, etc. that decompose oils and fats are propagated. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment apparatus into which wastewater containing oils and fats flows.

[0002]

2. Description of the Related Art Sewage drained from kitchens such as restaurants contains high-concentration oils and fats, and the grease trap used as a processing device is used to treat oils and fats into a tank over time. It is practiced to float the oil and periodically lift the lid from above to pump the floating oil and fat into a container.

[0003]

It is very troublesome to raise the lid from above at regular intervals and pump up the floating oils and fats in the tank, and if it is forgotten, it becomes a pollution problem. Although microbial treatment is a hassle-free process, excessive sewage inflow can cause microbes to be washed away, preventing proper reproduction and preventing efficient purification. It is.

[0004]

SUMMARY OF THE INVENTION The present invention relates to the improvement of the latter device using microorganisms, and the feature of the present invention is that a partition wall is provided upright in a sewage inflow tank body. An aeration box having a funnel shape in the chamber and having a perforated hole formed in the bottom is provided so that there is a certain gap between it and the inner wall of the tank at a certain height above the bottom of the tank. In addition to this, the oil and fat of the wastewater treatment liquid flows from the bottom of the tank body into the aeration box through the gap,
The aeration box is characterized by a configuration in which microorganisms, fungi, and the like, which are processed by decomposing oils and fats, propagate. At this time, the use of a plurality of partition walls divides the chamber into a plurality of chambers, and each chamber is provided with an aeration box in the same configuration as described above, or the oil and fat that floats from the bottom of the tank and flows into the aeration box is efficiently used. In order to facilitate the aeration, an upward air blow-off pipe is arranged below the gap into which the oil and fat flows, or a bowl is arranged upward between the box bottom and the tank bottom of the aeration box, and the aeration box and The height of the bowl from the tank bottom can be changed as appropriate, and the aeration tank is provided with a stirrer or an air blowing pipe.

[0005]

FIG. 1 is a longitudinal sectional front view of a device according to the present invention.
FIG. 2 is a plan view with the cover plate removed. Reference numeral 1 denotes a tank body of the wastewater treatment apparatus, and 2 denotes a partition wall mounted upright between opposing wall surfaces in the tank. The partition wall 2 divides the inside of the tank body into a plurality of chambers (A in the illustrated example). , B, C, D). At this time, each of the chambers A, B, C, and D is in a state in which the lower ends of the partition walls have a constant gap H between the bottom of the partition wall and the bottom of the tank, so that they communicate with each other. k is a weir plate.

Reference numeral 3 denotes a sewage inflow pipe, and reference numeral 4 denotes a collecting basket disposed below the pipe for foreign substances and garbage. 5 is rooms B and C
The aeration box is provided with a rectangular pyramid funnel shape as shown in FIGS. 1 and 2, and a through hole 6 is formed in the bottom surface. The flange pieces provided at the four corners are formed by fastening screw bolts 8 of an appropriate length in the height direction perpendicular to the respective flange pieces using nuts 9.

Reference numeral 10 denotes a bridging plate which is attached so as to straddle the partition walls 2, 2. The upper end of the screw bolt 8 is fastened to the bridging plate 10 by using a nut 9, so that aeration is performed. The box 5 is mounted so as to be suspended at a required constant height on the bottom of the tank. In this case, a certain gap W is formed between the upper peripheral edge of the aeration box and the wall surface and the partition wall of the tank body. It is to be formed.

Reference numeral 11 denotes an air pump, and the air generated by the operation of the pump is guided by a pipe to a central portion 11a of the bottom of the chambers B and C and a lower portion 11b of the gap W to be ejected. The lifting of the oil and fat floating from the bottom of the tank is promoted, and the auxiliary action is performed so that the oil and fat flows efficiently from the gap W into the aeration box.

Reference numeral 12 denotes a stirrer provided in the central portion of the aeration box 5 for appropriately stirring the oil and fat flowing into the aeration box 5 as described above. Decompose microorganisms and fungi at regular intervals.

Reference numeral 13 denotes a bowl disposed between the box bottom and the tank bottom of the aeration box. In the illustrated example, a screw rod 14 is attached vertically from outside the box bottom, and the bowl is connected to a nut 15 through this. The gap s between them is changed at the position where the nut 15 is fixed.

In the drawings of the above-described embodiment, the aeration box having the above-described structure is provided also in the chamber C in the tank main body to perform the same function. Is appropriately designed in accordance with the size of the installation area, and has a remarkable effect upon effective decomposition treatment of fats and oils. Reference numeral 16 denotes a discharge trap tube.

The aeration box 5 having the above-described structure according to the present invention requires at least one aeration box, and its volume can be designed to an arbitrary size.
n. Bacteria, yeasts, and the like are used as the microorganisms that decompose the oils and fats, and braids may be provided to enable suitable propagation.

Next, the operation will be described. The sewage flowing from the sewage inflow pipe 3 is filtered by the collecting basket 4 of the chamber A to remove impurities and rough trash, and then dives below the partition wall 2 to reach the chamber B.
The oils and fats 17 contained in the sewage float upward and are in the same state in the compartment C as shown in the illustrated example.

The grease 17 rises so as to crawl on the bottom and back of the aeration box 5, passes through the gap W between the inner wall surface of the tank and the partition wall surface, overflows from the upper peripheral edge of the aeration box 5, and becomes a box. Flows into the interior. At this time, by allowing a small amount of outside air to be ejected from the air ejection pipes 11a and 11b disposed at a certain height position on the tank bottom, the floating of the oils and fats 17 can be performed efficiently. It is.

Thus, the fats and oils sent into the aeration box 5 through the gap W are decomposed by the microorganisms that propagate in the box. By the way, in the aeration box 5, the settling oil and fat is stirred by appropriately operating the stirrer 12, so that the decomposition process proceeds efficiently.

At this time, a part of the oil or fat 17 to be stirred flows out of the box bottom through the through hole 6, but collides with the bowl 13 and rises in the gap s to return to the inside of the aeration box 5. A flow is formed to assist the effect of the decomposing microorganisms on the oil and fat floating in the tank.

It should be noted that, instead of the agitator 12 described above, an air ejection pipe or a circulating pump means can be provided in the aeration box 5 so that the same operation and effect can be obtained. These may be used in combination.

[0018]

The present invention is configured as described above, and by arranging an aeration box in a tank with a special structure,
The oils and fats are efficiently taken into the aeration box, and the decomposition treatment by the microorganisms is performed, thereby contributing to reduction of equipment costs and operation costs.

[Brief description of the drawings]

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

FIG. 2 is a plan view with the lid removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank main body 2 Partition wall 3 Sewage inflow pipe 4 Obstruction basket 5 Aeration box 8 Screw bolt 10 Cross-linking board 11 Air ejection pipe 12 Stirrer 13 Bowl 16 Drain trap pipe 17 Oil and fat content

Continuation of the front page (56) References JP-A-10-230288 (JP, A) JP-A-4-74600 (JP, U) Registered utility model 3054901 (JP, U) (58) Fields investigated (Int. Cl) . ^7, DB name) C02F 3/00 - 3/34

Claims (5)

(57) [Claims] 1. A sewage inflow tank main body having a partition wall standing upright to form a partitioned chamber, wherein the chamber has a funnel shape, and an aeration box having a through hole formed in a bottom portion is provided at the bottom of the tank. It is mounted so that there is a certain gap between it and the inner wall of the tank at a position above a certain height, so that the grease of the wastewater treatment liquid flows from the bottom of the tank into the aeration box through the gap. A wastewater treatment apparatus characterized in that, in addition to the above, an aeration box is configured to propagate microorganisms and fungi that are decomposed by decomposing fats and oils. 2. A partition wall is erected in a main body of a sewage inflow tank, divided into a plurality of chambers, and each chamber is connected to each other at a bottom of the tank, and at least one of the divided chambers is provided. Aeration box having a funnel shape and having a perforated hole in the bottom part is attached so that there is a certain gap between it and the inner wall surface of the tank at a certain height above the bottom of the tank. In addition to the fact that the fats and oils of the wastewater treatment liquid flow into the aeration box from the bottom of the tank through the above-mentioned gap, the decomposition of the fats and oils in the aeration box and the propagation of microorganisms and fungi A wastewater treatment device characterized by the above-mentioned. 3. The wastewater treatment apparatus according to claim 1, wherein an upward air blow-off pipe is provided below a predetermined gap formed between the inner wall surface or the partition wall surface of the tank body and the peripheral edge of the aeration box. . 4. A bowl is disposed upward between a box bottom and a tank bottom of an aeration box, and is mounted so that height positions of the aeration box and the bowl from the tank bottom can be appropriately changed. The wastewater treatment apparatus according to claim 1, 2, or 3. 5. The wastewater treatment apparatus according to claim 1, wherein a stirrer and / or an air blowing pipe is provided in the aeration box.