JPH10286566A - Wastewater purifying system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recycle type private sewage treatment tank for a temporary lavatory in which the generation of offensive odor is eliminated and the purifying efficiency is improved so that the tank is formed smaller. SOLUTION: A wastewater purifying system is provided with a sedimentation separation tank 3, a contact aeration tank 5 and a sedimentation tank 7 set successively in the order, and is so constituted as to purify wastewater while the wastewater is transferred successively into respective tanks and circulate and utilize purified watstewater. In that case, an activated air generator 10 is attached to the wastewater purifying system, and activated air generated from the device is blown into the contact aeration tank 5, and a porous filter medium 20 composed of humus heaped earth as a main material is disposed on the upper section of an activated air blowing opening, and a means for blowing in the activated air while permeating intermediate purified water having passed the sedimentation tank 7 through a pretreatment filter 14 and a bacteria removing filter 15 is provided. Sludge generated in respective tanks is introduced into a microbial degradation tank 21 and degraded completely, and the purified water is reused as flushing water and degraded matters of generated sludge are reused as a fertilizer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purification system that circulates and uses purified sewage, wherein active air is blown into a purification treatment tank to pass intermediate purified water through a pretreatment filter and a sterilization filter. By blowing active air, it is possible to prevent the generation of unpleasant odors from the septic tank, and to improve the purification level and efficiency to reduce the size,
The present invention relates to a sewage purification system in which purified water can be reused.

[0002]

2. Description of the Related Art Purification systems utilizing the microbial decomposition reaction of sewage have been in practical use for a long time, and recently, among those used as temporary toilets, purified water is used for flushing without discharging the water generated there. There is a growing need for “recyclable” temporary toilets that can be reused as such.

[0003] The temporary toilets of this type are as small as possible in view of their installation conditions and purpose of use, and it is necessary that unpleasant odors are not generated during the sewage purification process.

[0004] As a system developed in response to the above needs, a system in which excreta is pumped to a microorganism growth bed by a pressure pump and the decomposition gas, water and decomposition residue are dispersed in the microorganism growth bed, or a sedimentation separation tank In addition, there has been proposed a temporary toilet having a contact aeration tank and a sedimentation tank compactly integrated with a toilet.

[0005]

However, since these conventional types of temporary toilets generate an unpleasant odor during the purification process, it is necessary to install a separate deodorizing means in the septic tank and there is a limit to miniaturization.

SUMMARY OF THE INVENTION The present invention is concerned with the problem of the conventional recycle temporary toilet, that is, in order to eliminate the generation of unpleasant odors in the septic tank, a novel means for decomposing the substances causing the unpleasant odors is employed. Not only to eliminate the generation of unpleasant odors, but also to improve the purification efficiency, to reduce the size, and to provide a sewage purification system capable of obtaining clear and odorless purified water comparable to clean water. Is what you do.

[0007]

According to a first aspect of the present invention, a sedimentation separation tank, a contact aeration tank and a sedimentation tank are arranged in order, and the wastewater is transferred to each tank while the sediment is transferred. In the sewage purification system that purifies the sewage and circulates and uses the purified water, an active air generator is attached to the sewage purification system, and active air generated from the device is blown into the contact aeration tank. A porous filter medium mainly composed of humic sediment is placed above the active air blow-in port, and the above-mentioned active air is blown into the intermediate purified water that has passed through the sedimentation tank while passing through the pretreatment filter and the sterilization filter. According to a second aspect of the present invention, the active air generating device includes a magnet disposed in the air passage so that a magnetic force (magnetic flux) line thereof is orthogonal to the air passage, and the magnet is disposed at a stage subsequent to the air passage to the charging area. Red The far-infrared radiation zones filled with line generating fiber is obtained by employing the provided comprising configuration in the communication form.

According to a third aspect of the present invention, in the sewage purification system, the pretreatment filter has a permeation hole of 1 to 3 μm, and the sterilization filter has a permeation hole of 0.1 to 0.0003.
μ.

According to a fourth aspect of the present invention, the bactericidal filter has a permeation hole of 0.001 to 0.0003 μm.

According to each of the inventions configured as described above, odor-generating substances such as methane gas and ammonia gas are decomposed by blowing active air into the contact aeration tank and, if necessary, the precipitation separation tank. In addition, the floc in the sewage is aggregated by the porous filter medium mainly composed of humus sediment installed in the contact aeration tank, and the sewage is quickly purified.
Further, by blowing active air while passing the intermediate purified water through the pre-filter and the sterilization filter, more complete purification is possible.

According to a fifth aspect of the present invention, in the above-mentioned sewage purification system, sludge generated in the sedimentation separation tank, the contact aeration tank and the sedimentation tank is charged into a microbial decomposition treatment tank to decompose microorganisms.

In the present invention configured as described above, the sediment sludge and suspended sludge generated in the sedimentation separation tank, the contact aeration tank and the sedimentation tank are completely decomposed.

According to a sixth aspect of the present invention, in the above-mentioned sewage purification system, a pump for pumping excrement is provided to a flush toilet used in the system.

[0014] With the above configuration, the sewage purification system according to the present invention can be installed regardless of the water level of the flush toilet and the water level of the septic tank.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, sewage 2 sent by a pipe 1 flows into a sedimentation separation tank 3. Two sedimentation / separation tanks 3 are installed continuously, and an advection pipe 4a is provided at an upper portion between the first sedimentation / separation tank 3a and the second sedimentation / separation tank 3b to provide the first sedimentation / separation tank 3a. The sewage, from which scum and flocs have been substantially removed, flows into the second settling tank 3b. In the second sedimentation separation tank 3b, scum and flocs are further removed, and the overflowed sewage flows into the contact aeration tank 5 via the advection pipe 4b.

Two contact aeration tanks 5 are provided in the same manner as the sedimentation / separation tank 3, and sewage passing through a communication pipe 6a provided below the first contact aeration tank 5a flows into a second contact aeration tank 5b. Then, it flows into the precipitation tank 7 through the communication pipe 6b extending from the upper part of the second contact aeration tank 5b toward the precipitation tank 7 and the floc sedimentation promoting cylinder 23 connected to the end thereof.

In the sedimentation tank 7, flocs in the sewage subjected to contact aeration are precipitated, and the sewage from which the flocs have been removed flows into the intermediate purified water tank 8 via the floating material removing weir G, the overflow channel 4c, and the overflow 4c. The intermediate purified water accumulated in the intermediate purified water tank 8 is pumped up by the pump 16a and sent to the pretreatment filter 14 through the water pipe 17a, and the active air generated by the active air generator 10 while passing therethrough is supplied to the air pipe 13
M is blown in through d, and methane gas, ammonia gas, and the like, which are substances causing the unpleasant odor, are decomposed. In addition, 12a is a distributor of active air.

The intermediate purified water that has passed through the pretreatment filter 14 is sent to the sterilization filter 15 via a water pipe 17b. The active air generated by the active air generator 10 is blown through an air supply pipe 13e to remove bacteria and deodorize, and flows into a sterilization / purification water tank 9 via a water supply pipe 17c. The sterilized purified water accumulated in the sterilized purified water tank 9 is pumped up by the pump 16b and supplied to the flush toilet via the water supply pipe 18. The collected active air blown into the pretreatment filter 14 and the sterilization filter 15 is reused in the contact aeration tank 5 through the collection pipe 13f.

The active air generated by the active air generator 10 is distributed by a distributor 12a and blown from a diffuser pipe 19 provided at the bottom of the contact aeration tank 5 through an air supply pipe 13b, so that methane gas which is a substance causing unpleasant odor is produced. And ammonia gas are decomposed. The contact aeration tank 5 is filled with a porous filter medium 20 mainly composed of humus sediment. The porous filter medium 20 is rich in cohesive force, and the floc in the sewage flows while the sewage passes therethrough. Is removed. If the active air is blown into the precipitation / separation tank 3, a further deodorizing effect can be obtained.

Reference numeral 21 denotes a microbial decomposition treatment tank. The scum and floc settled sludge generated in the sedimentation separation tank 3, the contact aeration tank 5, the sedimentation tank 7 and the like are transferred to the microbial decomposition treatment tank by appropriate means. Here, the microorganism is completely degraded.

As shown in FIG. 2, the active air generator 10 has a dust filter 10 for removing dust from the atmosphere.
1. An air passage 102 surrounded by a permanent magnet 103, a chamber 104, a charging area 105, a far-infrared ray generating area 106 made of fibers containing seaweed charcoal as an active ingredient, and an air reservoir 108 are sequentially arranged. The generation area 106 is provided with a heater 107 for promoting generation of far infrared rays.

The air sucked by the blower 11 (FIG. 1) is negatively ionized while passing through the air passage 102 in a direction perpendicular to the magnetic force (magnetic flux) line, and unpleasant while passing through the far infrared ray generation area 106. It becomes air with strong activity to decompose odor-causing substances.

As shown in FIG. 3, the pre-treatment filter 14 has a filter chamber 142 having a zigzag filter membrane 142 having a transmission hole of 1 to 3 μm in a filter chamber 141.
A water supply pipe 17a extending from 6a (FIG. 1) is connected to the upstream filter chamber 143, and a water supply pipe 17b extending to the sterilization filter 15 is connected to the downstream filter chamber 144. The upstream filter chamber 143 is provided with an ultrasonic vibration element 145 for dropping flocs deposited on the film surface. Reference numeral 146 denotes a support for supporting the filter film 142.

As shown in FIG.
A porous cylindrical filter 153 having a through hole of 0.1 to 0.0003 μ, preferably 0.001 to 0.0003 μ is placed in the center of the mantle tube 151, and the mantle tube 151 is sealed at both ends with flanges 155. The cylindrical filter 153 is also fixed at the same time. A water pipe 17b extending from the pretreatment filter 14 is connected to the outer space 152,
The active air generator 1 is located at the center of the upper flange 155a.
0 is connected to the air supply pipe 13d extending from the lower flange 1
At the center of 55b, a water supply pipe 17c for passing purified water that has been sterilized through a cylindrical filter extends and reaches the sterilized purified water tank 9.

As shown in FIG. 5, the microbial decomposition treatment tank 21 is provided with a support frame 21b provided on the inner side of a gantry 21a, and a cylindrical outer tank 21c is supported on the support frame 21b. Through hole 21 in the horizontal direction
d is opened, and the bearing 2 is provided outside the through hole 21d.
1e is provided.

A hollow shaft 21f penetrates the bearing 21e, and a partition 21g is provided at a central portion thereof. An inflow port 21h for sludge and a decomposition gas discharge port 21i are provided on both sides thereof. The hollow shaft 21f has a punching net 21j.
Is formed in a cylindrical shape, and an inner tank 21n provided with a stirring blade 21k on the inner surface is rotatably supported. Reference numeral 21o denotes a watering pipe for moisturizing the inside of the inner tank 21n in a state suitable for microbial decomposition, 21p a water reservoir, and 21q a heater for keeping the temperature.

The sludge fed into the microbial decomposition tank 21 is mixed with the microorganism growth / culture bed in the inner tank 21n to be decomposed into decomposed gas, water and decomposition residues by microbial decomposition.

Next, a test plant having the following specifications was manufactured, and the effects of the present invention were confirmed. Sewage inflow from temporary flush toilet: 0.0125 m ³ / hr Inner volume of first sedimentation / separation tank: 0.6 m ³ Inner volume of second sedimentation / separation tank: 0.2 m ³ Inner volume of first contact aeration tank: 0.6 m ³ same porous filter material input amount: 0.4 m ³ same active air blowing amount: 1440 m ³ / hr inner volume of second contact aeration tank: 0.3 m ³ same porous filter material input amount: 0.24 m ³ Same active air blowing amount: 960 m ³ / hr Inner volume of sedimentation tank: 0.2 m ³ Retention time of sewage in the system: 120 hr Porous filter media = humus sedimentary soil (kuroboku soil) + silica stone + binder (Product name: Touch) Stone) Permeation hole of pretreatment filter membrane: 2μ Permeation hole of sterilization filter: 0.0002μ Active air generator Magnet (outer diameter / inner diameter / length) = 80φ × 40φ × 250mm Far-infrared ray generator ・ ・ ・ Contains seaweed charcoal Fiber, far-infrared wavelength = 4 to 14μ Blower air discharge: 0.04 m ³ / min Blower discharge air pressure: 0.12 kgf / cm ² Heater temperature: 40 ° C.

When a running test was performed in a test plant having the above specifications, the following results were obtained. Unpleasant odor… None Water chromaticity… 10 or less Escherichia coli group… Not detected General bacteria… Not detected BOD… 5ppm or less SS… 5ppm or less PH… 5.8 ~ 8.6

[0030]

As is clear from the above description, according to the present invention, no unpleasant odor is generated from each tank constituting the sewage purification system, and the purification efficiency is improved. Made possible.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of the active air generator.

FIG. 3 is a configuration diagram of a pre-processing filter.

FIG. 4 is a configuration diagram of a sterilization filter.

FIG. 5 is a configuration diagram of a microorganism decomposition tank.

[Explanation of symbols]

Reference Signs List 1 pipe 2 sewage 3 sedimentation separation tank 4a, 4b advection pipe 5 contact aeration tank 6a, 6b communication pipe 7 sedimentation tank 8 purified water tank 9 sanitized water tank 10 active air generator 11 blower 12a, 12b distributor 13a, 13b, 13c , 13d, 13e, 13f, air supply pipe 14 pretreatment filter 15 sterilization filter 16a, 16b pump 17a, 17b, 17c water supply pipe 18 water supply pipe 19 diffuser pipe 20 porous filter medium 21 microbial decomposition treatment tank 22 sedimentary sludge transport path 23 floc Settling promotion cylinder

Claims (6)

[Claims] 1. A sewage purification system in which a sedimentation separation tank, a contact aeration tank, and a sedimentation tank are sequentially arranged, the sewage is purified while the sewage is transferred to each of the tanks, and the purified water is circulated and used. An active air generator is attached to the sewage purification system, and active air generated from the system is blown into the contact aeration tank, and a porous material mainly composed of humic sediment is provided above the active air blowing port. A wastewater purification system, comprising means for blowing the active air while passing through a pretreatment filter and a sterilization filter, through which the intermediate purification water having passed through the sedimentation tank is disposed with a quality filter medium. 2. The active air generating device according to claim 1, wherein a magnet is arranged in the air passage so that a magnetic force (magnetic flux) line is orthogonal to the air passage, and a charging region and a far infrared ray generating fiber are filled in a latter stage of the air passage. 2. The infrared ray generating area is provided in a communicating manner.
A sewage purification system according to item 1. 3. The sewage purification system according to claim 1, wherein the permeation hole of the pretreatment filter is 1 to 3 μm, and the permeation hole of the sterilization filter is 0.1 to 0.0003 μm.
Or the sewage purification system according to any one of 2. 4. The bactericidal filter according to claim 1, wherein a permeation hole of said filter is 0.00.
The sewage purification system according to any one of claims 1 to 3, wherein the sewage purification system has a particle size of 1 to 0.0003 µm. 5. The sewage purification system according to claim 1, wherein sludge generated in the sedimentation separation tank, the contact aeration tank and the sedimentation tank is charged into a microbial decomposition treatment tank for microbial decomposition. A sewage purification system as described. 6. The sewage purification system according to claim 1, wherein the sewage purification system further comprises a pump for pumping excrement into a flush toilet used in the system. .