JPH0975961A - Small-scale waste water treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-scaled waste water treatment device being compact and integrally formed. SOLUTION: This device is provided with a septic tank 1 with an aeration device and a cylindrical main body 2 at the upper part of the septic tank 1, and a louver 3 for separating an organic solid component in sewage in the main body 2, a water stream cyclone region 4 of the sewage on the upper part of the louver 3 and a cylindrical filter element 5 for filtering the sewage from the outside wall to the inside wall are arranged and a discharge pipe 7 is provided on the inside of the filter element 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater purification treatment device used for purification of small-scale wastewater and the like.

[0002]

2. Description of the Related Art An activated sludge treatment device is used for purification of small-scale wastewater such as kitchen wastewater. FIG. 7 illustrates an outline of the activated sludge treatment device. First, waste water is put into the purification layer 101 by the waste water pump 100. An aeration pipe 102 composed of an air hose having a large number of pores is arranged at the bottom of the septic tank 101.
Fine air bubbles from 2 to the septic tank 1 by the air pump 103
It is released into 01 and causes bacteria to reproduce and cure. Then, bacteria ingest the organic solid content (SS content) in the wastewater and wastewater as a nutrient source to promote purification. In addition, 103a shows an air filter. Next, this sewage is transferred to the settling tank 105 via the transfer pump 104, and in this settling tank 105, the residue of the SS component taken in by the bacteria as a nutrient source is settled. Here, the precipitation water is guided from the lower part of the precipitation tank 105 to the filtration device 106, where it is concentrated, the residue is removed as a small amount of cake ash, and the filtered water is discharged or returned to the precipitation tank 105. 107 is a filtering device 1
The scraper attached to No. 06 shows an example in which the sludge cake 108 is guided to the conveyor 109 and removed. Settling tank 10
Floating water from the upper part of 5 is introduced into a filter tank 111 made of sand and activated carbon through a pump 110, and thereafter, treated water (30
˜300 ppm). In addition, 115 is a vacuum tank, 116 is a vacuum pump, and filtered water (after removing cake ash) from the filtration device 106 is returned to the precipitation tank 105 via the vacuum tank 115.

[0003]

In the prior art, even with a small-scale wastewater treatment apparatus as described above, many tanks, pumps and other equipments are required, and the installation space for these equipments is small. In addition, in the kitchen wastewater treatment, these equipments have no way to install them in the basement, rooftop, or outdoors, and the installation conditions are very poor, and the plant itself is extremely expensive including foundation work. It was The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small-scale wastewater treatment device that solves the above problems and is compactly unitized.

[0004]

In accordance with the above object, the present invention provides a septic tank equipped with an aeration device and a cylindrical main body above the septic tank, and the main body contains organic solids contained in wastewater. A wastewater treatment device in which a louver to be separated, a water flow cyclone area for sewage above the louver, and a tubular filter element for filtering sewage from an outer wall to an inner wall are provided, and an exhaust pipe is provided inside the filter element. By solving the above, the above problems have been solved. Of the sewage sent to this device, the SS component is separated into the septic tank, and the sewage after separation rises and is filtered from the outer wall of the filter element to the center,
The treated water is discharged out of the equipment through the drainage pipe in the center of the equipment.

[0005]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described with reference to FIGS.
Will be described in detail with reference to. In the figure, 1 is a septic tank, and 2 is a cylindrical main body portion fixed to the upper part of the septic tank 1 with bolts via mutual flanges. The main body 2 is the lowermost part, that is, the louver 3 in the part directly above the septic tank 1, the water flow cyclone region 4 in the upper part of the louver 3, the tubular filter element 5 in the upper part of the water flow cyclone region 4, and the upper part of the filter element 5. A lid 6 is arranged on each of the upper and lower sides, and a central space 22 is formed at the center of the main body 2 and extends vertically above and below
And a treated water discharge pipe 7 having an open top at its center is connected from the main body 2 to the outside through the septic tank 1. The septic tank 1 consists of a cylindrical tank. In this septic tank 1, 11 is an aeration pipe provided with a large number of pores, which is arranged in a spiral shape at the center of the bottom of the septic tank 1 (see FIG. 5) and through a ball valve 12. The air is sent from the outside. Reference numeral 13 is an outlet for the deposited sediment, 14 is an inspection window for monitoring the inside of the septic tank 1, and 15 is an inlet for bacteria.

The louver 3 in the main body 2 located immediately above the septic tank 1 is provided with a large number of slanted skirt-shaped straightening vanes 31 radially, and as shown in FIG. They are arranged so as to overlap each other in the upper and lower projection directions, but to maintain a proper distance from each other. Reference numeral 41 is a water supply port for sending in sewage, and this water supply port 41 is disposed so as to penetrate the cylindrical inner wall of the main body 2 in the cutting line direction (see FIG.
), The sewage fed therein is configured to swirl inside the main body 2. Therefore, a hydrocyclone region 4 is formed above the louver 3.

The cylindrical filter element 5 is composed of a complex in which oil-adsorbed cotton and activated carbon are alternately wound in multiple layers. The oil contained in the sewage is oil-adsorbed cotton, and the odor is determined by activated carbon. Each is adsorbed. The filter element 5 is installed on a ring plate 24 that surrounds a cylindrical body 23 that forms a part of the central space 22. Reference numeral 25 is a reinforcing rib that supports the ring plate 24. An appropriate space 21 is provided between the outer wall of the filter element 5 and the inner wall of the main body 2, and the sewage guided in this space 21 passes through the filter element 5 toward the center, so that the filter element 5 5 reaches the central space 22 and is discharged from there through the opening 7a at the top of the discharge pipe 7 to the outside of the apparatus. The lid 6 is configured to be opened and closed in the direction of arrow M by the opening / closing mechanism 8 (see FIG. 1). That is, by operating the opening / closing handle 81, the bar 82 expands and contracts, and in conjunction with this bar 82, a part of the lid 6 pivotally attached to the main body 2 is pivoted to a position as shown by a chain line. Rock. Further, when closed (during operation), the lid 6 is secured by a large number of tightening bolts 83 provided around it.
Is configured so that it can be tightly sealed to the main body 2. 9
Is a step for raising and lowering, and is used by an operator when replacing the filter element 5, cleaning the inside of the main body 2, and performing maintenance and inspection.

The operating procedure of this apparatus will be described below. First, the miscellaneous waste water is sent from the water intake 41 of the main body 2 to the inside. The sent miscellaneous wastewater (hereinafter referred to as sewage) becomes a swirl flow inside the main body 2 and forms a water flow cyclone region 4. Here, the solid matter (organic solid matter, that is, SS matter) is separated. That is, the SS component is separated from the sewage by the louver 3 provided directly below the water cyclone region 4, and falls into the septic tank 1 provided below. The fallen SS component will not re-float to the water flow cyclone region 4 due to the slanted straightening plate 31 of the louver 3. The SS component dropped into the septic tank 1 is supplied with oxygen by fine air bubbles (aeration) from the aeration pipe 11 arranged at the bottom of the tank, and breeds and cures the introduced bacteria. Therefore, the SS content is ingested by bacteria, and the residue becomes ash and accumulates in the lower part of the septic tank as a very small amount of precipitate. This deposit is monitored through the inspection window 14 and appropriately taken out from the outlet 13 and incinerated or disposed of as industrial waste.

On the other hand, SS-free sewage separated by the water cyclone and the louver 3 swirls due to the effect of the water cyclone and fills the outer space 21 of the filter element 5, and is filtered by the filter element 5 to the center. It flows into the space 21. The fine air bubbles of the air aerated in the septic tank 1 always pass through the filter element 5 (oxygen supply). Therefore, the fine SS, oil, and odor adsorbed when the sewage passes through the filter element 5 are ingested as a nutrient source for the activated and reproductive-cured bacteria nesting therein. The residue is deposited as ash on the outer wall of the filter element 5, and a swirling flow due to a water cyclone is generated on the outer periphery of the residue, and bubbles due to aeration collide with the deposited ash and burst, causing ultrasonic waves. A phenomenon occurs, the deposits are separated from the filter element 5, and again fall into the septic tank by the water cyclone and the louver 3. Therefore, the filter element 5 itself is not clogged. The treated water that has passed through the filter element 5 and reached the central space 22 is sequentially discharged from the opening 7 a of the discharge pipe 7. In the process water 15 m ^3/24 hours according to the present device, a drainage discharge criteria for general river BOD150~30ppm, COD150~30pp
I was able to pass m.

[0010]

According to the apparatus of the present invention, a series of functions required as a wastewater purification apparatus are provided, and these functions can be combined into a unit, which enables downsizing. Especially for the treatment of a small amount of domestic wastewater, a fully functional product was completed. There is no method other than installation in a limited narrow space for purification treatment of kitchen wastewater, which is a future issue,
The device of the present invention can solve these problems most effectively. Further, the processing capacity can be appropriately scaled up if necessary.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus according to the present invention.

FIG. 2 is a plan view of the device.

FIG. 3 is a longitudinal sectional view of the device.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

5 is a cross-sectional view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line DD of FIG.

FIG. 7 is an explanatory diagram of a processing system of a conventional device.

[Explanation of symbols]

 1 Septic tank 2 Main body 3 Louver 4 Water flow cyclone area 5 Filter element 7 Discharge pipe 11 Aeration pipe 31 Rectifier plate 41 Water inlet

Claims (3)

[Claims] 1. A septic tank provided with an aeration device, and a tubular main body provided on the upper part of the septic tank, the louver for separating organic solids in the wastewater into the main body, and the wastewater above the louver. A wastewater treatment device comprising a water flow cyclone region and a tubular filter element for filtering dirty water from an outer wall to an inner wall, and a discharge pipe provided inside the filter element. 2. The wastewater treatment apparatus according to claim 1, wherein the filter element is formed by alternately winding oil-adsorbed cotton and activated carbon in a spiral manner. 3. The wastewater treatment apparatus according to claim 1, wherein a wastewater discharge port is provided on a tangent line of the main body tubular wall to generate a water cyclone.