JP3213519B2 - Small-scale 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 an apparatus for purifying wastewater used for purifying small-scale wastewater and the like.

[0002]

2. Description of the Related Art Activated sludge treatment apparatuses are used for purifying small-scale wastewater, for example, kitchen wastewater. FIG. 7 explains the outline of the activated sludge treatment apparatus. First, sewage is injected into a purification layer 101 by a sewage pump 100. An aeration tube 102 composed of an air hose having a large number of pores is arranged at the bottom of the septic tank 101.
2 to separate fine bubbles by the air pump 103 in the septic tank 1
01 and release bacteria for breeding and curing. Bacteria ingest the organic solids (SS content) in the wastewater as nutrients to purify the bacteria. Reference numeral 103a denotes an air filter. Next, the sewage is transferred to the precipitation tank 105 via the transfer pump 104, and the SS residue remaining in the precipitation tank 105 is taken in by bacteria as a nutrient source. Here, from the lower part of the sedimentation tank 105, the sedimentation water is led to the filtration device 106, where it is concentrated, the residue is removed as a small amount of cake ash, and the filtration water is discharged or returned to the sedimentation tank 105. 107 is a filtration device 1
A scraper attached to 06 is shown, and an example in which the sludge cake 108 is guided to and removed from the conveyor 109 is shown. Settling tank 10
From the upper part of 5, floating water is guided to a filtration tank 111 made of sand and activated carbon via a pump 110, and thereafter, treated water (30
(~ 300 ppm). A vacuum tank 115 and a vacuum pump 116 return filtered water (after removing cake ash) from the filtration device 106 to the precipitation tank 105 via the vacuum tank 115.

[0003]

In the prior art, even a small-scale wastewater treatment apparatus as described above requires many devices such as tanks and pumps, and the installation space for these devices is limited. In the case of kitchen wastewater treatment, there is no alternative to installing these devices in basements, rooftops, or outdoors.The installation conditions are extremely poor, and the plant itself is very expensive, including foundation work. Was. The present invention has been made in view of the above circumstances, and has as its object to provide a small-scale wastewater treatment apparatus which solves the above-mentioned problems and is compactly unitized.

[0004]

According to the present invention, there is provided, in accordance with the present invention, a septic tank provided with an aeration device, and a cylindrical main body provided on the upper part of the septic tank. A wastewater treatment apparatus having a louver to be separated, a water cyclone region for sewage at an upper portion of the louver, and a cylindrical filter element for filtering sewage from an outer wall to an inner wall, and a discharge pipe provided inside the filter element. By doing so, the problem was solved. Of the sewage sent into this device, the SS component is separated and sent to 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 device from a drain pipe in the center of the device.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to FIGS.
This will be described in detail with reference to FIG. In the figure, 1 is a septic tank, and 2 is a cylindrical main body fixed to the upper part of the septic tank 1 with bolts via mutual flanges. The main body 2 has a louver 3 at the lowermost portion thereof, that is, a portion immediately above the septic tank 1, a water cyclone region 4 at an upper portion of the louver 3, a tubular filter element 5 at an upper portion of the water cyclone region 4, and an upper portion of the filter element 5. The lids 6 are respectively arranged at the center, and a central space 22 is formed in the center of
And a discharge pipe 7 for treated water whose top is opened at the center thereof is connected to the outside from the main body 2 through the septic tank 1. The septic tank 1 is composed of a cylindrical tank. In this septic tank 1, reference numeral 11 denotes an aeration tube provided with a number of pores, which is arranged in a spiral shape at the center of the bottom of the septic tank 1 (see FIG. 5). Air is supplied from outside. Reference numeral 13 denotes an outlet for the deposited sediment, reference numeral 14 denotes an inspection window for monitoring the inside of the septic tank 1, and reference numeral 15 denotes an inlet for bacteria.

The louver 3 in the main body 2 located immediately above the septic tank 1 has a large number of inclined skirt-shaped rectifying plates 31 radially provided therearound, as shown in FIG. Although the competitors overlap each other in the upper and lower projection directions, they are arranged so as to keep an appropriate distance from each other. Reference numeral 41 denotes a water supply port for feeding sewage, and the water supply port 41 is disposed so as to penetrate the cylindrical inner wall of the main body 2 in the direction of the section line (FIG. 4).
), So that the fed sewage is swirled in the main body 2. Therefore, a water flow cyclone region 4 is formed above the louver 3.

[0007] The cylindrical filter element 5 is made of a composite in which oil-absorbing cotton and activated carbon are spirally and alternately wound in multiple turns. The oil contained in the sewage is oil-absorbing cotton and the odor is activated carbon. Each is adsorbed. The filter element 5 is installed on a ring plate 24 provided around a cylindrical body 23 forming a part of the central space 22. Reference numeral 25 denotes a reinforcing rib for supporting 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 into this space 21 passes through the filter element 5 toward the center, and The discharge pipe 7 reaches the central space 22 and is discharged out of the apparatus through the opening 7a at the top of the discharge pipe 7. The lid 6 is configured to be opened and closed in the direction of arrow M by the opening and closing mechanism 8 (see FIG. 1). That is, by operating the opening / closing handle 81, the bar 82 expands and contracts, and the lid 6, a part of which is pivotally attached to the main body 2 in conjunction with the bar 82, moves to a position shown by a chain line. Rocks. When the cover 6 is closed (during operation), a large number of tightening bolts 83 provided around the cover 6 allow the cover 6 to be closed.
Can be tightened and sealed to the main body 2. 9
Is a step for elevating and lowering, which is used by an operator when replacing the filter element 5, cleaning the inside of the main body 2 or performing maintenance and inspection.

The operation and operation of the apparatus will be described below. First, miscellaneous wastewater is supplied from the water inlet 41 of the main body 2 to the inside. The supplied wastewater (hereinafter referred to as sewage) forms a swirling flow inside the main body 2 to form a water flow cyclone area 4. Here, solid matter (organic solid matter, that is, SS content) is separated. That is, the SS component is separated from the sewage by the louver 3 provided immediately below the water flow cyclone area 4 and falls into the septic tank 1 provided below. The dropped SS portion does not re-emerge in the water flow cyclone region 4 because of the inclined straightening plate 31 of the louver 3. The SS component that has fallen into the septic tank 1 is supplied with oxygen by fine air bubbles (aeration) from the aeration tube 11 arranged at the lowermost portion in the tank, and the supplied bacteria are propagated and cured. Therefore, the SS component is taken up by bacteria, and the residue becomes ash and deposits in the lower part of the septic tank as a very small amount of precipitate. This sediment is monitored through the inspection window 14, and is appropriately taken out from the outlet 13 and incinerated or disposed of as industrial waste.

On the other hand, the sewage having no SS content separated by the water flow cyclone and the louver 3 is filled with the space 21 on the outer periphery of the filter element 5 while turning due to the effect of the water flow cyclone, and is filtered by the filter element 5 to be filtered. It flows to space 21. Fine 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 serve as a nutrient source of the bacteria in the activated and bred and cured state nesting there. The residue accumulates on the outer wall of the filter element 5 as ash, but a rapid swirling flow is generated around the outer periphery of the filter element 5 by a water flow cyclone, and bubbles generated by aeration collide with the accumulated ash and burst. A phenomenon occurs, and the sediment separates from the filter element 5 and falls again into the septic tank by the water cyclone and the louver 3. Therefore, the filter element 5 itself does not clog. 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
m.

[0010]

According to the apparatus of the present invention, a series of functions required as a wastewater purification treatment apparatus are provided, and these can be combined into a unit to reduce the size. In particular, for the treatment of a small amount of domestic wastewater, a product with sufficient functions was completed. There is no way to purify kitchen wastewater, which is a future issue, except for installation in a limited space.
According to the device of the present invention, these problems can be solved most effectively. Further, the processing capacity can be scaled up as needed.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the same device.

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

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

FIG. 5 is a sectional view taken along line BB of FIG. 1;

FIG. 6 is an explanatory sectional view taken along line DD of FIG. 4;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Septic tank 2 Main part 3 Louver 4 Water flow cyclone area 5 Filter element 7 Discharge pipe 11 Aeration tube 31 Straightening plate 41 Water inlet

Claims (3)

(57) [Claims] 1. A septic tank provided with an aeration device, a tubular main body provided on an upper part of the septic tank, a louver for separating organic solids in the sewage in the main body, and a sewage in an upper part of the louver. A wastewater treatment apparatus comprising a water flow cyclone region, a cylindrical filter element for filtering wastewater 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 the oil-absorbing cotton and the activated carbon in a spiral manner. 3. The wastewater treatment apparatus according to claim 1, wherein a water supply port for sewage is provided on a tangent line of the main body cylindrical wall to generate a water flow cyclone.