JP3302000B2 - Hybrid septic tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a single-tank treatment tank which separates wastewater and wastewater discharged from households in accordance with the concentration of pollutants, instead of combining them uniformly. It is hybridized by being integrated into
So to speak, a hybrid septic tank.

[0002]

2. Description of the Related Art With the development of sewage treatment technology, a single septic tank for purifying human waste has been abolished, and household wastewater such as toilet sewage discharged from homes, kitchen sewage, bathroom effluent, washing effluent, and wash basin effluent. Are all uniformly treated by the combined treatment septic tank.

[0003] At that time, in particular, 200 to 300
In order to enable the combined treatment of bathroom drainage and washing wastewater that leaks L / day, it is indispensable to use a large-capacity combined treatment septic tank.

By the way, focusing on the concentration of pollutants in the above-mentioned sewage and wastewater to be merged,
In the case of toilet sewage or kitchen sewage, etc., the pollutant concentration belongs to an extremely high category, but among the above-mentioned household wastewater, bathroom drainage, washing drainage, washstand drainage, etc., the degree of the contamination is low. It is well known that it belongs to a very low category.

[0005]

In a conventional merger treatment septic tank, cobblestones are mixed and uniformly supplied to the merger purification treatment without considering the level of the pollutant concentration in the sewage and drainage described above. Some are inefficient in the following ways:

For example, the purification treatment capacity of organic sewage having an extremely high concentration of pollutants is easily diluted by bathroom drainage or washing drainage which flows in a large amount in a short period of time. Become.

Therefore, in order to reduce the influence of a large amount of inflow and to secure a predetermined discharge performance, various devices such as incorporating a flow control tank and ancillary equipment therefor, and enabling the flow control of the entire tank can be performed. As a result, the capacity of the combined treatment septic tank is increased.

On the other hand, for bathroom drainage, washing drainage, washing sink drainage and the like having a low degree of contamination, they are mixed with organic sewage having a high concentration of pollutants, thereby relatively increasing the degree of contamination.

Further, in the conventional merger treatment septic tank, wastewater with a low degree of contamination cannot be reused as intermediate water for toilet washing water, car wash water, garden tree watering water, etc. However, it is also a situation that cannot meet today's challenges that require effective use of limited water.

[0010] In this respect, conventionally, there is a case in which a dedicated wastewater treatment tank for treating mainly wastewater such as bathroom drainage or rainwater as intermediate water is provided separately from the sewerage.

However, in an area where there is no sewerage facility, it is necessary to separately install the wastewater treatment tank in addition to the existing single wastewater treatment tank and the combined treatment wastewater treatment tank. Then, not only will the user be burdened with a large burden of equipment and maintenance costs, but also considering the housing situation in Japan, the combined installation septic tank and miscellaneous wastewater treatment tank will be installed in a limited installation space. There are many situations where it is difficult to bury.

[0012]

In order to solve the above-mentioned problems, the present invention provides a sewage treatment tank for purifying sewage having a high concentration of pollutants and a effluent for regenerating wastewater having a low concentration of pollutants. This provided a hybrid septic tank (hereinafter, referred to as a hybrid septic tank) which is formed by integrating the treatment tanks into a single tank and integrating them.

More specifically, a single tank is provided with a sewage treatment tank for purifying toilet sewage and kitchen sewage having a high concentration of pollutants, and a bathroom effluent having a relatively low degree of contamination among household wastewater. The hybrid clarification tank incorporates a wastewater treatment tank that regenerates and reuses washing drainage, washing drainage, and the like as toilet washing water, car wash water, garden tree watering water, and the like.

At this time, the single tank is completely separated into a sewage treatment tank and a wastewater treatment tank by a partition plate, so that it can be reused as toilet wash water, car wash water, water for spraying garden trees, and the like. Is prevented from being contaminated by inflow sewage or treated sewage from the sewage treatment tank.

Further, the surplus portion of the wastewater flowing into the wastewater treatment tank is flown into the sewage treatment tank, so that the surplus portion of the inflow wastewater is subjected to the merging treatment with the inflow wastewater having a high concentration of pollutants.

[0016]

[0017]

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to a schematic plan view of a hybrid septic tank shown in FIG. 1 and a schematic diagram of a hybrid system shown in FIG.

Reference numeral 1 denotes a partition plate for completely separating a single tank into two tanks, one of which has a larger tank capacity and is partitioned into a sewage treatment tank X for purifying sewage having a high concentration of pollutants.
The other side having a smaller capacity is formed as a wastewater treatment tank Y for regenerating wastewater having a low concentration of pollutants. The capacity ratio of each of these tanks varies depending on the number of target personnel, but usually the tank capacity of the sewage treatment tank X is about 2/3 to 3/4, and the wastewater treatment tank Y is about 1/3 to 1/4. About.

Among them, one of the sewage treatment tanks X is provided from the side of the inflow pipe 2 into which the sewage flows into to the side of the treated water discharge pipe 3.
The treatment tank is divided into a plurality of treatment tanks in accordance with the process order of the sewage purification treatment.
And a secondary treatment tank 5 for aerobically treating the primary treatment wastewater,
It comprises a treated water tank 6 for storing the secondary treated wastewater and a disinfecting tank 7 for disinfecting it. The objects to be purified in the sewage treatment tank X include toilet sewage and kitchen sewage having a high concentration of pollutants.

In FIG. 1, reference numeral 8 denotes a partition wall between the primary treatment tank 4 and the secondary treatment tank 5, and the primary treatment wastewater flows to the secondary treatment tank 5 from an advancing port provided in the partition wall 8. Reference numeral 9 denotes a partition wall between the secondary treatment tank 5 and the treatment water tank 6, and the secondary treatment wastewater flows through the bottom opening of the partition wall 9 and flows into the treatment water tank 6. Reference numeral 11 denotes a partition wall between the treatment water tank 6 and the disinfection tank 7, and the supernatant stored in the treatment water tank 6 overflows to the disinfection tank 7 and is subjected to the disinfection treatment.

The other wastewater treatment tank Y is divided into a plurality of treatment tanks from the inflow pipe 11 into which the wastewater flows, to the treated water advancing pipe 12 according to the order of the wastewater regeneration treatment. Includes a primary treatment tank 13 for inflow wastewater, a secondary treatment tank 14 for the primary treatment wastewater, a treatment tank 15 for the secondary treatment water, a disinfection tank 16 for disinfecting the same, And a water storage tank 17. The wastewater to be treated in the wastewater treatment tank Y includes, among household wastewater , bathroom wastewater with low pollutant concentration, washing wastewater, wash sink wastewater, and the like.

Also, in the case of this wastewater treatment tank Y, similarly to the case of the above-mentioned sewage treatment tank X, each of the treatment tanks 13-17.
Are defined by partitions 18 to 21 as shown in FIG. The partition 18 partitions the primary processing tank 13 and the secondary processing tank 14, and the partition 19 partitions the secondary processing tank 14, the processing water tank 15, and the disinfecting tank 16. In addition, the treatment water tank 16 and the disinfection tank 16
And a partition 21 is used to separate the treatment water tank 15 and the disinfection tank 16.
And a water storage tank 17.

Numeral 22 denotes a pump for pumping water from the water storage tank 17, which is installed in the water storage tank 17 as shown in FIG. It is provided on the way. The sewer pipe 23 is the pump 2
The indoor water pumped up by step 2 is plumbed indoors and out to reuse it as toilet wash water, car wash water, garden tree sprinkle water, and the like.

Reference numerals 24 and 25 denote advection pipes and their check valves, which are provided above the partition plate 1 for partitioning the primary treatment tank 13 of the wastewater treatment tank Y and the primary treatment tank 4 of the sewage treatment tank X. The excess wastewater flowing into the primary treatment tank 13 overflows to the primary treatment tank 4 of the sewage treatment tank X, and the check valve 25 prevents backflow. Naturally, the water level line of the primary treatment tank 13 on the wastewater treatment tank Y side is set to be higher than the water level line of the primary treatment tank 4 on the sewage treatment tank X side. The check valve 25 is not required, but is preferably mounted in case of emergency.

[0026]

[Modification] In FIG. 1, reference numeral 26 denotes a bypass pipe,
As indicated by the imaginary line, the excess wastewater flowing into the wastewater treatment tank Y is piped so as to be transferred from the middle of the wastewater inflow pipe 11 to the wastewater inflow pipe 2 by bypassing the outside of the tank. Therefore,
Means for allowing the excess of the inflowing sewage to flow into the primary treatment tank 4 of the sewage treatment tank X are to directly overflow from the advection pipe 24 provided in the tank or to flow in from a bypass pipe 25 provided outside the tank. To deal with it.

When sewage having a high concentration of pollutants, such as toilet sewage or kitchen sewage, flows into the primary treatment tank 4 from the sewage inflow pipe 2, impurities in the sewage are removed before the primary treatment tank 4. Either the precipitate is removed by sedimentation or anaerobic treatment in the first chamber of the anaerobic filter tank, and then the anaerobic filter tank is subjected to anaerobic treatment again in the subsequent anaerobic filter tank to be subjected to primary treatment.

When the primary sewage is transferred to the next secondary treatment tank 5, the sewage is usually subjected to a biological filtration treatment through a fluidized bed carrier by air ejected from an air diffuser, or an aeration treatment with a contact filter medium. Alternatively, it is subjected to dynamic filtration by a nonwoven fabric membrane module immersed in activated sludge in a tank, or purification by suction filtration with a precision flat membrane module and a suction pump.

Thereafter, the secondary sewage spills from the partition wall 9 into the next treatment water tank 6 to be stored therein, is subjected to a disinfection treatment in the disinfection tank 7, and is discharged outside the tank.

On the other hand, when the wastewater having a low concentration of pollutants, such as bathroom wastewater, washing wastewater, and washroom wastewater, flows into the primary treatment tank 13 from the domestic wastewater, the primary treatment tank 13 The contaminants therein are removed by sedimentation separation, or are firstly treated after being removed by a screen or the like.

When the primary treatment wastewater is transferred to the next secondary treatment tank 14, it is usually subjected to a biological filtration treatment through a fluidized bed carrier or a non-woven fabric immersed in the tank by air ejected from an air diffuser. By dynamic filtration using a membrane module or suction filtration using a precision flat membrane module and a suction pump, the wastewater is regenerated into intermediate water that can be used as reused water.

Further, the filtered water is transferred to and stored in the next treated water tank 15 as necessary, and then subjected to a disinfecting treatment in a disinfecting tank 16. Finally, the clean water that has been disinfected is
The water is transferred to and stored in the water storage tank 17, pumped up by a pump 22 provided inside or outside the tank, and supplied to a central water supply pipe 23, so that the water is reused.

[0033]

[Modification] The secondary treatment tank 14 of the wastewater treatment tank Y described above.
However, in the case of a membrane treatment tank, the filtered water can be directly transferred to the disinfection tank 16. When the water storage tank 17 is installed alone outdoors, the advection pipe 12 is connected to the disinfecting tank 16 and pumped by the pump 22 to an outdoor water storage tank (not shown).

FIG. 3 shows the flow of water supply / drainage per day when a 5-person tank of the merged treatment septic tank is introduced into a standard house, the amount of water supply, the amount of water used at each water supply / drainage station, and the merged treatment septic tank. FIG. 4 is a schematic view showing an example of a processing amount and a discharge flow rate in the present embodiment.
When the human tub is introduced into a standard home, the above values are obtained as numerical values as shown in the schematic diagram of FIG.

For example, as shown in FIG. 2, the wastewater obtained by regenerating domestic wastewater having a low concentration of pollutants is washed with a toilet.
If 200L is used for water purification and 200L for garden watering and car washing, and 100L of bath water is used as washing water, the water consumption of the water supply can be largely reduced from 1204L to 704L. In addition, the discharge flow rate in the combined treatment septic tank shown in FIG.
In the case of the hybrid septic tank of the present invention, the discharge flow rate is reduced to half of 504 L, suggesting that it can contribute to the effective use of water. Also, the hybrid septic tank of the present invention
Then, surplus of inflow sewage and gray water into the sewage treatment tank
During peak hours, the total inflow is halved to 504L
Fluctuations in the inflow of water have become much more
It becomes gentle. Therefore, merge the incoming sewage.
The processing performance in the sewage treatment tank is dramatically improved. Therefore,
Assuming that the treatment performance in the sewage treatment tank is the same
Sewage treatment tank capacity,
The hybrid of the present invention can be made smaller.
The capacity of the entire septic tank is the same as that of the previous merged septic tank.
It can be dealt with by the size of about.

[0036]

As described above, the present invention integrates a sewage treatment tank for purifying sewage with a high concentration of pollutants and a wastewater treatment tank for regenerating effluent with a low concentration of pollutants into a single tank. Since the hybrid septic tank is made into a wastewater, the purification treatment of sewage corresponding to the level of the pollutant concentration and the regeneration treatment of wastewater as middle water can be performed appropriately and extremely efficiently.

For this reason, the purification capacity of one of the sewage treatment tanks is dramatically improved, and the other wastewater treatment tank is used to discharge bathroom drainage, laundry drainage, and so on having a relatively low degree of contamination among household wastewater. Wash water can be reused as toilet wash water, car wash water, garden water sprinkling water, etc., and has tremendous effects such as contributing to water saving and effective use of water resources.

At this time, the single tank is completely separated into a sewage treatment tank and a wastewater treatment tank by a partition plate, so that it can be reused as toilet wash water, car wash water, water for spraying garden trees, and the like. Of the wastewater treatment tank is not contaminated by inflow sewage or treated sewage from the sewage treatment tank.

Then, the surplus wastewater flowing into the wastewater treatment tank is flown into the sewage treatment tank, so that the surplus wastewater flowing into the wastewater treatment tank is combined with inflow wastewater having a high concentration of pollutants. Therefore, when the water storage tank is full, the processing of the surplus inflow drainage is not impaired.

In addition, the sewage that has been disinfected in the wastewater treatment tank is
By incorporating means for pumping up from the disinfecting tank or water storage tank, it is usually convenient to pump up and reuse intermediate water from a hybrid septic tank buried underground.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a hybrid septic tank.

Fig. 2 Daily water supply / drainage flow, water supply / water consumption, water supply / reuse water consumption at each water supply / drainage station, and sewage treatment tank when a 5-person hybrid septic tank is introduced into a standard home. FIG. 4 is a schematic diagram showing an example of a treatment amount in a wastewater treatment tank and a discharge flow rate, and a unit of a numerical value entered in the figure is L / day.

Fig. 3 Flow of daily water supply / drainage, water consumption, water supply / water consumption at each water supply / drainage station, and treatment in the merger treatment septic tank when a 5-person tank of the merger treatment septic tank is introduced into a standard home. It is a schematic diagram which shows an example of quantity and discharge flow, and the unit of the numerical value described in the figure is L / day.

[Explanation of symbols]

 X Sewage treatment tank Y Wastewater treatment tank 1 Partition plate 2 Sewage inflow pipe 3 Discharge pipe 4,13 Primary treatment tank 5,14 Secondary treatment tank 6,15 Treatment water tank 7,16 Disinfection tank 8,9,10,18,19 , 20, 21 Partition wall 11 Drainage inflow pipe 12, 24 Advection pipe 17 Water storage tank 22 Pump 23 Central water pipe 25 Check valve 26 Bypass pipe

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Morita Zhang 33, Yamahanashiki-machi, Chiryu-shi, Aichi Fuji Clean Industry Co., Ltd. Water Environment Laboratory (56) Reference JP-A-4-94794 (JP, A) Kaihei 3-7999 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 3/00

Claims (1)

(57) [Claims] 1. A sewage treatment tank for purifying sewage having a high concentration of pollutants, and a wastewater treatment tank for regenerating effluent having a low concentration of pollutants by means of a partition plate provided in a single tank. A hybrid septic tank, wherein the waste water is separated into two compartments and the excess wastewater flowing into the wastewater treatment tank flows into the wastewater treatment tank.