JPH0937996A - High order treatment purifying vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high order treatment purifying vessel having the capability of reducing the BOD value of sewage treated water, as well as neutralizing the treated water, ensuring the decolorization and deodorization thereof for use as a treated water supply and the reduction of running cost, allowing a quick operation after installation, and further having the capability of setting a normal operation state in a short period. SOLUTION: This purifying vessel is made of the first aeration chamber 2 for aerating sewage water via oyster shells as contact materials 2a after the inflow thereof, an anaerobic filter bed chamber 3 for keeping a sewage overflowing from the first aeration chamber 2 in contact with porous artificial filter materials 3a for anaerobic treatment, the second aeration chamber 4 for flowing sewage water purified in the anaerobic filter bed chamber 3 and performing aeration treatment, using the oyster shells as contact materials 4a, and a finishing treatment chamber 5 for introducing water purified from the second aeration chamber 4 and keeping the water in contact with activated carbon 5c to perform a high level of purifying treatment for decolorization and deodorization.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to purify human / animal excreta, domestic wastewater, organic wastewater, and water such as creeks and ponds (hereinafter collectively referred to as sewage) to flush toilet flushing water, fire extinguishing water and watering. The present invention relates to a septic tank that performs advanced treatment to such an extent that it can be used as water at the level of a middle water supply, and is particularly useful for the purification treatment of human waste water.

[0002]

2. Description of the Related Art A conventional treatment of a septic tank is a treatment in which sedimentation and separation are performed, and thereafter, contact aeration is performed using an artificial filter medium. In this case, it was not possible to sufficiently purify the urine, and the purified water had a high BOD value and a high PH, and was not usable as water at the level of a middle tap water. In addition, there is a septic tank that uses abacus as a contact material to perform aeration treatment to enhance the purification power and bring the treated water closer to neutrality.However, aeration treatment using only an abacus does not cause transparency, decolorization or deodorization. The problem is that it is sufficient, and because a large number of scraps are consumed, the scraps are often replenished, the running cost is high, and it takes about three months to start up before the condition becomes normal after the septic tank is installed. There was a point.

[0003]

The problem to be solved by the present invention is to solve these problems of the prior art, to lower the BOD value of the sewage treated water, to neutralize the treated water, and to reduce the treated water. It is an object of the present invention to provide an advanced treatment septic tank which can be decolorized and deodorized, can be treated to a degree high enough to be transparent and can be used as a middle water supply, can run at a low cost, can be quickly set up at the time of installation, and can be put into a normal use state in a short number of days. . Another object is to use the water in the septic tank as washing water for flush toilets, and to make it possible to recycle water.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) A first aeration chamber for aerobically treating inflowing sewage using a shell as a contact material, and a first aeration chamber for the same. An anaerobic filter chamber that performs anaerobic decomposition treatment by bringing the overflow into contact with a porous artificial filter medium, and a sewage treated by the anaerobic filter chamber that infiltrate the anaerobic filter chamber. Advanced treatment septic tank consisting of an air chamber and a finishing treatment chamber where the water purified in the second aeration chamber flows in and comes into contact with activated carbon to perform advanced purification of decolorization and deodorization 2) Sedimentation separation chamber for sedimentation separation of wastewater And a contact aeration chamber in which the liquid of the sewage separated by precipitation is introduced and aerated, and a precipitation chamber in which the contact aeration chamber of the contact aeration chamber is stored and sent to the first aeration chamber. The height according to 1) above, which is provided as a chamber for pretreatment of sewage flowing into the first aeration chamber. 3) The advanced treatment septic tank described in 1) or 2) above, which supplies the highly purified water in the finishing treatment room to the tank in the toilet room. As the porous artificial filter medium of the present invention, a type using a granular, massive, or plate-like contact material having a porous waste adsorbing power and a purifying power, and a contact member having a waste purifying power and an adsorbing power are used as waste water. There is a type in which three-dimensionally assembled, woven, and multi-layered nets are formed so as to form a large number of fine gaps and passages that can pass therethrough.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the human waste water discharged from the toilet is used as it is, or is subjected to solid-liquid separation in a sedimentation separation chamber, separated in a contact aeration chamber, pretreated by aeration, or other conditions. In the state of being subjected to the simple pretreatment for purification, it flows into the first aeration chamber. In the first aeration chamber, aeration treatment is performed using the squid as a contact material. The sewage is alkalized and neutralized by the squid, and the sewage is well decomposed and purified by aerobic aeration treatment efficiently on the porous surface of the squid. First
The upper layer water of the wastewater that has been decomposed and purified to some extent in the aeration chamber flows into the anaerobic filter chamber as an overflow, contacts the artificial filter medium, and is anaerobically decomposed and purified. The water purified in the anaerobic filter chamber further flows into the second aeration chamber, where it comes into contact with the contact material of the chaff and is aerobically decomposed and purified by the aeration to a BOD value of about 5 PPM or less. Purify. Neutralizes to near PH7. After that, the water in the second aeration chamber flows into the finishing treatment chamber, passes and circulates through the adsorption cylinder containing activated carbon to decolorize and deodorize the water, and is transparent and neutral with a BOD value of 5 to 1 PPM.
It is drained to some extent and discharged into rivers. Or, it is distributed as central tap water such as toilet water, garden water, pond water, fire extinguishing water. In the present invention, the use of oysters can provide high decomposition and purification power and neutralization, but the use of oysters can reduce the use of oysters by not using all husks for purification. By reducing the consumption of shells and the number of replenishments, and by adding anaerobic filter bed purification, the quality of decomposition and purification is improved, and those that are difficult to decompose in aerobic conditions can be sufficiently decomposed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the embodiment shown in the drawings, a sedimentation separation chamber, a contact aeration chamber and a sedimentation chamber are provided in a pretreatment septic tank, and human waste sewage purified in the pretreatment septic tank is first aerated and anaerobic filter bed chambers.・
This is an example of an advanced treatment septic tank that performs advanced purification treatment in a septic tank with a second aeration chamber, sedimentation chamber, and finishing treatment chamber, and reuses the purified water as tap water for toilet water, sprinkling water, and pond water. is there. 1 is a cross-sectional view of the embodiment, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a cross-sectional view taken along line BB of FIG.
FIG. 5 is a cross-sectional view taken along line CC of FIG. 1, FIG. 5 is a cross-sectional view taken along line DD of FIG. 1, FIG. 6 is an explanatory view showing overflow weir of the embodiment, and FIG. FIG. 8 is an enlarged partial cutaway front view showing the suction tube of the embodiment, and FIG. 9 is an explanatory diagram showing a processing flow of the embodiment.

In the figure, 1 is a septic tank, 2 to 6 are chambers provided in the septic tank 1, 2 is a first aerated chamber, 3 is an anaerobic floor chamber, 4 is a second aerated chamber, and 5 is a second aerated chamber. A finishing treatment room, 6 is a sedimentation room for sedimenting wastes in front of the finishing treatment room 5, 7 is a pretreatment bath for sedimenting and separating human waste from a toilet, contacting it and sending it to the septic tank 1, and 8 is a pretreatment tank for the same. Reference numeral 7 denotes a sedimentation separation chamber, 9 denotes a contact aeration chamber, 10 denotes a sedimentation chamber, 11 denotes an inflow pipe of human waste from a toilet, and 12 denotes a first aeration of the wastewater of human waste pretreated in the pretreatment tank 7 in the purification tank 1. A transfer pipe for transferring to the chamber 2, a sludge return pipe 13 for returning the sediment in the sedimentation chamber 6 of the purification tank 1 to the sedimentation separation chamber 8 of the pretreatment tank 7, and 14 a and 14 b for highly treated water of the finishing treatment chamber 5 Drain pipe, 15 is a toilet tank, 16 is a pond water faucet, 17 is a sprinkler sprinkler pipe, 18a, 18b Pump for sending water drainage pipes 14, 19 drain pipe into rivers, 20 during the opening and closing valve of the water discharge pipe, 21 flush toilet bowl, the 22 tank installation foundation, 23 a lid. Reference numerals 2a to 2e relate to the first aeration chamber 2, and reference numeral 2a denotes a squid contact material which is sunk in a net bag and settled, and 2b is assembled with an FRP angle for precipitating the squid contact material on an upper surface. A frame on which a mesh is laid, 2c is an air diffuser pipe for feeding air, 2d is a baffle, 2e is a partition for partitioning the first aeration chamber 2, the anaerobic floor chamber 3, and the second aeration chamber 4. 3a to 3d relate to the anaerobic filter room 3, and 3a
Is an artificial filter medium using a porous granular material (trade name: Nissin Krisbar) specially processed from amorphous silicic acid and crystalline silicic acid, and 3b is a partition wall for partitioning the anaerobic filter bed and the second aeration chamber. Reference numeral 3c denotes a communication port below the partition 3b, and 3d denotes a backwashing device. 4a to 4e relate to the second aeration chamber 4, 4a is a contact material using a squid, 4b is an air diffuser, 4c
Is an air pipe, 4d is an outlet of the second aeration chamber 4, and 4e is a backwashing device. 5a to 5f relate to the finishing chamber 5; 5a is a partition partitioning the precipitation chamber 6 and the finishing chamber 5; 5b is an adsorption cylinder; and 5c is a granular powder packed and housed in the adsorption cylinder. Activated carbon, 5d is a water pipe for feeding water in the finishing treatment chamber 5 from below in the adsorption cylinder 5b, and 5e is the adsorption cylinder 5
A water outlet 5f provided above b is a pump provided in the middle of a water pipe 5d for feeding the water in the finishing chamber 5 to the adsorption cylinder 5b. 6a to 6d relate to the precipitation chamber 6,
6a is a horizontal transfer pipe bent downward to allow the water in the second aeration chamber 2 to flow into the precipitation chamber 6, 6b is an overflow weir that transfers the water in the precipitation chamber 6 to the finishing treatment chamber 5, 6c Is a cartridge provided in the middle of the overflow, 6d is an inlet of the overflow, 6e
Denotes an outlet, and 6f denotes an air supply pipe for sending air from a lower portion of the bent vertical portion of the sludge return pipe 13 to function as an air lift pump. 8a to 8c relate to the sedimentation separation chamber 8 of the pretreatment tank 7; 8a is a convection port opened at the upper part of the partition wall 8b for transferring the sewage of the sedimentation separation chamber 8 to the contact aeration chamber 9; Partition wall with contact aeration chamber 9, 8
c is a baffle, and 8d is a stack tube. 9a to 9e relate to the contact aeration chamber 9, 9a is a contact material using a honeycomb type artificial filter medium, 9b is a diffuser tube, 9c is a backwash tube, 9d is a communication port with the sedimentation chamber 10, and 9e is a contact bubble. A partition wall 9f between the air chamber 9 and the sedimentation chamber 10 is an air supply pipe. 10a is the sedimentation chamber 1
This is an intake section for sending the wastewater of No. 0 to the transfer pipe 12 while eliminating suspended solids.

In this embodiment, night soil from the flush toilet 21 of the toilet flows into the sedimentation separation chamber 8 of the pretreatment tank 7 through the inflow pipe 11. In the sedimentation separation chamber 8, solids, sand, metal and the like of human waste are settled, and the liquid component of the sewage flows into the contact aeration chamber 9 through the advection port 8a while preventing the suspended matter from flowing out in the baffle 8c. In the contact aeration chamber 9, while being exposed to the air from the air diffuser 9b, it comes into contact with the contact material 9a and is subjected to aeration treatment, and the human wastewater is subjected to a primary decomposition treatment, and overflows from the upper end of the partition wall 9e to the sedimentation chamber 10. Transition. The upper sewage stored in the sedimentation chamber 10 flows into the transfer pipe 12 while being separated and eliminated at the intake section 10a so that suspended matter does not flow into the transfer pipe 12, and the sewage is transferred from the pretreatment tank 7 to the first clarification tank 1 of the purification tank 1 by the transfer pipe 12. It flows into the aeration chamber 2. In the pretreatment tank 7, the human waste having a BOD value of about 260 PPM flowing from the inflow pipe 11 is 90 P
Purified to about PM. The pH of the sewage in the treated sedimentation chamber 10 has a strong acidic value of 15 to 16. Next, the sewage flowing from the transfer pipe 12 is stored in the first aeration chamber 2, air is sent from the diffuser pipe 2c, comes into contact with the bagged and filled oyster contact material 2a, and the alkaline It comes into contact with the porous surface and is aerated in an alkaline, nearly neutral, aerobic environment. First aeration chamber 2
Sewage treated in the anaerobic filter room 3 through the baffle 2d
And is anaerobically decomposed by using the artificial filter medium 3a made of granular material in the porous chamber as a contact material. Anaerobic decomposition is enhanced because the wastewater is neutralized. The sewage from the anaerobic floor chamber 3 flows into the second aeration chamber 4 through the communication port 3c below the partition wall 3b, and releases air from the air diffuser 4b as in the first aeration chamber 2. It is aerobically aerated by the packed oyster contact material 4a. The sewage treated in the second aeration chamber 4 flows in from the outlet 4d, flows into the precipitation chamber 6 via the horizontal transfer pipe 6a, and sediments solid components.
The supernatant water flows from the inflow port 6d to the overflow wed 6d, and after being disinfected by the cartridge 6c on the way, flows into the finishing treatment tank 5 from the water discharge port 6e. Sludge return pipe 1 from air supply pipe 6f
When air is sent from below the bent vertical portion of FIG. 3, suction force is generated, and the sediment in the sedimentation chamber 6 is removed from the sludge return pipe 1.
3 and is transferred to the sedimentation separation chamber 8 of the pretreatment tank 7 for reprocessing. In the finishing tank 5, the water in the finishing tank 5 sucked up by the pump 5 f from below the inside of the adsorption tube 5 b by the water supply pipe 5 d by the pump 5 f is discharged from the bottom of the adsorption tube 5 b, and the granular activated carbon 5 c packed in the middle thereof , And is decolorized and deodorized, and is discharged from the upper water outlet 5e. By circulating the water in the finishing treatment chamber 5 in the adsorption cylinder 5b, the sewage becomes odorless transparent water. The odorless and clarified water is supplied from the drain pipes 14a, 14b to the pumps 18a,
The water is sucked by 18b and sent to the toilet tank 15, the pond water faucet 16 and the sprinkler watering pipe 17 for the toilet washing water, and the toilet water is used cyclically. A part is discharged to the river through the drain pipe 19. FIG. 9 shows the flow of these purification processes.

The sewage flowing into the first aeration chamber 2 of this embodiment has a BOD value of 90 PPM and a pH of 15 to 16, but the water discharged from the drain pipe 14 has a BOD value of 5 to 1 PPM. , PH were about 6 to 8 and could be used as water for middle tap water. Also, after installing the advanced treatment septic tank of the present embodiment, the time required for the purification function to rise to the normal state can be reduced from about 3 months in the past to about 1 month,
In addition, the consumption of the husk was reduced by using the artificial filter medium, and the replenishment of about 200 kg was completed once every five years.

[0010]

As described above, according to the present invention, the BOD value can be improved by the first and second aeration chambers using the oyster shell as the contact material and the anaerobic filter bed chamber using the artificial filter material as the contact material. Is capable of performing high-level purification treatment of 5PPM or less, and because the wastewater is almost neutral with the shuck, it can be used as it is as tap water without providing neutral treatment, or even when it is discharged into a river. It rarely pollutes rivers. Also, the amount of used husks can be reduced, the number of refills can be reduced, and the rise up to the state of normal use with the septic tank installed can be shortened. Furthermore, if the wastewater is used as toilet water, the water can be recycled and used, and it can be made excellent in terms of environment and water resources.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG.

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

FIG. 6 is an explanatory diagram showing an overflow overflow of the embodiment.

FIG. 7 is an enlarged plan view showing the suction cylinder of the embodiment.

FIG. 8 is an enlarged partial cutaway front view showing the suction cylinder of the embodiment.

FIG. 9 is an explanatory diagram illustrating a processing flow according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Septic tank 2 1st aeration chamber 2a Oyster shell contact material 2c Aeration tube 3 Anaerobic floor room 3a Artificial filter media 4 2nd aeration chamber 4a Contact material 4b Aeration tube 5 Finishing treatment room 5b Adsorption tube 5d Water pipe 5f Pump 6 Precipitation Chamber 7 Pretreatment tank 8 Precipitation separation chamber 9 Contact aeration chamber 10 Precipitation chamber 11 Inflow pipe 12 Transfer pipe 13 Sludge return pipe 14a Drain pipe 14b Drain pipe 15 Toilet tank 16 Pond water faucet 17 Drain pipe 18a Pump 18b Pump 19 Drain pipe 20 Opening / closing valve 21 Washing toilet 22 Tank installation base 23 Lid

Claims (3)

[Claims] 1. An anaerobic decomposition treatment is performed by contacting an inflowing wastewater with a first aeration chamber for aeration using a chaff as a contact material and an overflow of the first aeration chamber with a porous artificial filter material. Anaerobic floor chamber, a second aeration chamber that injects sewage purified in the anaerobic floor chamber and performs aeration using the chaff as a contact material, and inflows water purified in the second aeration chamber Advanced treatment septic tank consisting of a finishing treatment room that performs advanced purification of decolorization and deodorization by contacting with activated carbon. 2. A settling separation chamber for settling and separating sewage, a contact aeration chamber where the liquid of the sewage that has been settled and separated flows in to contact aeration, and a contact aeration process of the contact aeration chamber The advanced treatment septic tank according to claim 1, wherein a settling chamber for storing and sending it to the first aeration chamber is provided as a chamber for pretreatment of sewage flowing into the first aeration chamber. 3. The advanced treatment septic tank according to claim 1, wherein water highly purified in the finishing treatment room is supplied to the tank in the toilet room.