JP2000024637A - Water treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment system small-sized in the system and lowered in cost. SOLUTION: The water treatment system is provided with a storage tank 10 for storing water to be treated, a transporting means (an air lift pipe 11 and a blower 12) for regularly transporting precipitate or the water to be treated in the storage tank 10 to a succeeding treatment part (solid-liquid separation device 20) by an airlift changed in the transporting quantity per unit time corresponding to the change in water level, a water level detecting means for detecting the water level in the water storage tank 10 and a control means for controlling an air lifting time so that the transporting quantity in every time is fixed to coincide with the treating quantity of the succeeding stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment system for treating waste water or the like containing crushed garbage from a disposer.

[0002]

2. Description of the Related Art In a conventional disposer wastewater treatment system, for example, wastewater containing crushed garbage from the disposer is temporarily stored in a flow control tank, and the precipitate is solid-liquid separated by an air lift or the like together with a liquid component. And separated into solid and liquid components, and the separated solid components are put into a compost (composting) device to be composted by an organic matter decomposition treatment by microorganisms. Further, the liquid component is put into an aeration tank, and organic components are decomposed by microorganisms by aeration treatment. Then, the treated water treated in the aeration tank is allowed to flow naturally to the sedimentation separation tank to precipitate the floc-excess sludge,
The supernatant is discharged to the sewer, and the sludge that has settled is returned to the first-stage flow control tank by an air lift or the like.

Generally, a flow control tank of this type of water treatment system is formed to have a large capacity for the purpose of adjusting a flow rate to a downstream processing section, and always stores a substantially constant amount of water to be treated. It has become. Therefore, even when the sediment in the flow control tank is periodically air-lifted to the solid-liquid separation device by an air lift in which the transfer amount per unit time varies according to the water level, the water level is almost constant. It should have been an air lift. In addition, a method has been proposed in which a constant flow rate pump is used to maintain a constant flow rate without using an air lift.

[0004]

When the above-mentioned disposer wastewater treatment system is to be widely used for general households, the miniaturization (and cost reduction) of the entire system is a major problem, and the entire system is problematic. In order to reduce the size, it is necessary to make the flow control tank smaller.
To do so, it is necessary to lower the water level of the flow control tank in advance in preparation for the user to use the disposer.

[0005] However, even when the sediment in the flow control tank is transferred together with the liquid by an air lift, the amount of air lift decreases as the water level decreases when the air lift for a certain period of time. Further, in order to efficiently perform the air lift, it is important to periodically perform the air lift by a constant amount corresponding to the processing volume of the next stage.

It is conceivable to use the above-mentioned constant flow pump. However, since the constant flow pump is more expensive than an electromagnetic diaphragm pump that does not use a motor and is generally used for an air lift, the cost of the system is low. It is high and not suitable for general household use.

Accordingly, the present invention has been made to solve such a problem, and has been made to reduce the size of the system,
It is an object of the present invention to provide a water treatment system capable of reducing costs.

[0008]

In order to achieve the above-mentioned object, the present invention provides a storage tank for storing water to be treated, and a sediment and water to be treated in the storage tank at a next stage. Transfer means, the transfer amount of which is transferred according to the water level, a water level detecting means for detecting the water level of the storage tank, and a water level detected by the water level detecting means. And control means for controlling the driving time of the transfer means so that the transfer amount at each time is constant.

In addition, a driving time of the transfer means for each time corresponding to a predetermined water level from a predetermined upper water level to a lower water level of the storage tank is predetermined and stored, and the control means controls the water level detection means. The transfer is performed at the stored first set time based on the water level detection output, and thereafter, the transfer is performed at the stored set time each time the transfer is performed.

[0010] Further, the invention is characterized in that a water level sensor for detecting a predetermined water level of the storage tank is provided as the water level detecting means.

When the water level in the storage tank is higher than the water level, the control means determines that the transfer amount per unit time is the maximum amount in the expected high water level range and determines the predetermined amount. The transfer is performed for each set time.

When the water level of the storage tank is lower than the sewage level, the control means considers that the transfer amount per unit time is the maximum amount of the expected low water level range, and determines the predetermined amount. The transfer is performed for each set time.

Further, the control means controls a drive time of a transfer means for transferring the precipitate in the storage tank to a solid-liquid separation device for separating the precipitate into a solid component and a liquid component.

Further, the control means controls a driving time of a transfer means for transferring the water to be treated in the storage tank to a water treatment tank for purifying the water to be treated.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of a disposer wastewater treatment system as a water treatment system according to the present invention.

In this disposer wastewater treatment system, wastewater containing crushed garbage from a disposer 3 provided below a sink 2 of a sink 1 is temporarily stored in a storage tank 10 having a flow rate adjusting function via a pipe 4. The sediment is put into a solid-liquid separator 20 together with the liquid by an air lift tube 11 to separate into a solid and a liquid, and the separated solid is put into a compost (composting) device 30 to be separated by microorganisms. It is composted by organic matter decomposition treatment. Also,
The separated liquid is put into a water treatment tank 40, and an organic component is decomposed by microorganisms to form flocs by aeration treatment. Then, the treated water treated in the water treatment tank 40 is allowed to flow naturally into the sedimentation separation tank 50 communicating with the upper part, and the excess sludge flocculated is settled. Tube 51
To return to the first storage tank 10.

The disposer 3 is of a batch type, in which the amount of water used at one time is constant, and the maximum processing amount of garbage is determined by the internal volume of the disposer 3.

The storage tank 10 is provided with a blower 12 for supplying air to a lower portion of the air lift pipe 11. Furthermore, a diffuser 1 is provided at the bottom of the storage tank 10.
3 is provided with a blower 14 for supplying air to the air diffuser 13. Further, a water level sensor for detecting the water level in the tank, which will be described later, is provided.

The solid-liquid separation device 20 is of a batch type, and an acceptable amount per operation is determined.

The water treatment tank 40 is provided with a diffuser 41 at the bottom thereof and a blower 42 for supplying air to the diffuser 41. Further, the water treatment tank 40 contains a carrier 43 in which aerobic microorganisms that decompose organic substances live. The water to be treated, which is a liquid component charged into the water treatment tank 40, contains an organic component. The aerobic microorganisms inhabiting the carrier 43 are activated by aeration, and the organic component is decomposed. In the sedimentation separation tank 50 at the next stage, which is communicated with the communication pipe 44, sedimentation as excess sludge is facilitated.

The sedimentation separation tank 50 has an air lift pipe 5
1 is provided with a blower 52 for supplying air to the lower part. Further, an air diffuser 53 is provided at the bottom of the settling tank 50, and a blower 54 for supplying air to the air diffuser 53 is provided. In addition, even if treated water containing flocs flows from the water treatment tank 40 when the sedimentation separation tank 50 is full, the partition plate 56 for preventing the treated water from being directly drained from the drain pipe 55 to the sewage. Is provided.

In this embodiment, the five blowers 12, 14, 42, 52, and 54 are used as described above.
For these blowers 12, 14, 42, 52, 54, relatively inexpensive electromagnetic diaphragm pumps are used.
This diaphragm pump discharges air by driving a solenoid by an AC power supply to vibrate the diaphragm at the frequency of the AC power supply. The number of blowers can be reduced by switching and controlling the air supplied from one blower to a plurality of uses by using a multi-way valve constituted by an electromagnetic valve or the like.

Each of the above blowers 12, 14, 42, 52, 5
4 is controlled by a microcomputer (hereinafter abbreviated as a microcomputer) as control means for controlling the entire system, except for the aeration blower 42 of the water treatment tank 40 which is almost always driven. Is controlled in accordance with

FIG. 2 is a timing chart showing an embodiment of the present invention, in which (101) to (104) of FIG.
These processes are repeated as one cycle (30 minutes in this example).

The process indicated by (101) in FIG.
From 0 to the solid-liquid separation device 20. In the case of an air lift, the amount of air lift varies according to the water level. It is necessary to control the air supply time, and this control will be described in detail later.

The process indicated by (102) in the figure is a process of returning sludge from the sedimentation separation tank 50 to the storage tank 10, and is started in synchronization with the end of the sediment transfer (101), and is performed in advance as described later. It is done for a fixed time.

The process indicated by (103) in FIG.
0 stirring aeration, and transfer of precipitate (10
It is started in synchronization with the end of 1), and is performed for a predetermined fixed time described later. That is, in this embodiment, the stirring and aeration (103) is performed in synchronization with the execution of the sludge return (102). However, this stirring aeration (1
Between the end of 03) and the start of the sediment transfer (101), a sedimentation time equal to or longer than a predetermined time predetermined according to the system is ensured. In the present system, depending on the shape of the storage tank 10 and the throughput of the disposer 3 at one time, the wastewater containing the garbage crushed material from the disposer 3, that is, the solid content and the liquid content are separated by gravity sedimentation. Time required by experiment etc.
The fixed time is set to 10 minutes.

The process indicated by (104) in the figure is the stirring and aeration of the sedimentation separation tank 50, which is started in synchronization with the end of the sludge return (102) and is performed for a predetermined period of time. The dashed line means that the stirring and aeration (104) of the precipitation / separation tank 50 does not need to be performed every cycle, but may be performed once every two cycles, for example.

FIG. 3 is a schematic configuration diagram for explaining the installation position of the water level sensor in the storage tank 10 and the like.

The storage tank 10 is provided at positions corresponding to the upper limit (upper water level) and the lower limit (lower water level) of the water level which normally changes due to normal use of the disposer 3 and periodic air lift.
Electrode type upper water level sensor 15 and lower water level sensor 16 respectively
In addition, an electrode type upper limit position sensor 17 is provided above the water level sensor 15 at an upper limit position where the storage tank 10 may overflow.

Normally, the water level changes in zone A between the upper water level sensor 15 and the lower water level sensor 16 (approximately equivalent to one drainage of the disposer 3). When the inflow water from the disposer 3 has been processed, the water level falls below the sewage level sensor 16. However, if the disposer 3 is used before the next inflow, the water level exceeds the upper water level sensor 15. . Therefore, when the sewage level sensor 16 is not turned off, it is better to limit the use of the disposer 3.

FIG. 4 is a characteristic diagram showing the relationship between the water level in the storage tank 10 and the time required for a certain amount of air lift.
It can be seen that the time required for a certain amount of airlift increases as the water level goes from higher to lower.

FIG. 5 shows a table of the operation times of the above-mentioned processes (101) to (104) which are predetermined based on the above-mentioned characteristic diagram, and this table data controls the entire system. It is stored in a memory in the microcomputer, and the microcomputer controls the processes (101) to (104) based on the stored table data. Sludge return from the sedimentation separation tank 50 to the storage tank 10 (102) is performed for 13.7 seconds per cycle, and agitation and aeration of the storage tank 10 (103) is performed for 900 seconds per cycle (1/30/1/15 for 15 minutes). 2), the stirring and aeration (104) of the sedimentation separation tank 50 is fixed to 5.0 seconds every other cycle, and the storage tank 1
Only the sediment transfer (101) from 0 to the solid-liquid separation device 20 is such that the air lift time is controlled according to the water level.

That is, in the normally used A zone as shown in FIGS. 3 and 4, steps 1 to 13 in FIG.
The control based on the operation time for each step as shown in FIG. 5 is performed with the turning off of the water level sensor 15 as a starting point (step 1). Specifically, in step 1 (first cycle), 3.9 seconds, and in step 2 (second cycle), 4.3 seconds.
Second, 4.7 seconds in step 3 (third cycle),..., 13.0 seconds in step 11 (eleventh cycle), step 1
In 2 (12th cycle), 17.8 seconds, step 13 (13
In the cycle (2), control is performed so as to be 20.0 seconds.

As a result, the amount of air lift to the solid-liquid separation device 20 becomes constant, and 13 cycles (6 cycles per 30 minutes).
In 30 minutes), the water level of the storage tank 10 can be lowered from the high water level to the low water level, and it is possible to sufficiently cope with the use of the disposer in a general household (for example, after breakfast and after dinner). Therefore, the storage tank 10 does not need to have a large capacity as in the conventional flow rate adjusting tank, and can be a small-capacity and small-sized storage tank having a little extra capacity for one discharge of the disposer 3, so that the system can be downsized. Can be realized. Further, a fixed amount of air lift can be performed without using an expensive constant flow pump, so that the cost of the system can be reduced.

Further, by using the table as shown in FIG. 5, it is not necessary to detect the water level only after detecting the water level, so that the control is simplified. Furthermore, the present invention is a non-contact type water level sensor that can continuously detect the water level in a non-contact manner by ultrasonic waves or infrared rays as a water level sensor, and continuously detects the water level from the air pressure blown out from the end of a pipe extending to the bottom of the tank. Although a pressure type water level sensor that can be used can be realized, in the present embodiment, an expensive sensor for continuously detecting the water level is not necessary, and thus the cost of the system can be further reduced. .

In the zone B, since the water level may be close to the upper limit position sensor 17, the time (for example, 3.0 seconds) at the point X in FIG. ) Air lift time. As described above, since the air lift time is suppressed to a small value by assuming the maximum amount of the air lift, it is possible to prevent a problem that the processing amount of the solid-liquid separation device 20 is exceeded. Note that this B
In the zone, when the sludge is returned (102), the storage tank 10
Since the water level further rises, it is necessary to return it while not monitoring it at all or monitoring the upper limit position sensor 17.

In the zone C, since the processing exceeds the assumed processing amount, it is not necessary to send the same fixed amount as in the zone A to a processing section at the subsequent stage such as the solid-liquid separation device 20. Further, it is difficult to keep sending the same amount (when the water level falls below a certain water level, the time shown on the vertical axis in FIG. 4 becomes infinite), and wasteful power is consumed. Therefore, sediment transport (10
Regarding 1), the step 13 (20.0 seconds) may be repeated. However, the stirring and aeration (104) of the precipitation / separation tank 50 is performed every other cycle. Step 14 in which only (104) is performed for 0 seconds, that is, not performed, is provided.
Repeat steps 3 and 14.

In the system configuration of FIG. 1, the storage tank 10, the water treatment tank 40, the sedimentation separation tank 50, and the compost device 30 are arranged in a horizontal line, and the solid-liquid separation device 20 is located above the water treatment tank 40. However, as shown in FIG. 6, the storage tank 10, the water treatment tank 40, and the sedimentation separation tank 50 are arranged as shown in FIG.
Are arranged adjacent to each other, and the composting device 3
0 is preferably disposed adjacent to the water treatment tank 40, and the solid-liquid separation device 20 may be disposed at an upper position over the water treatment tank 40.

By doing so, the pipes (the air lift pipes 11, 51 and the communication pipe 44) for sending the sediment, the water to be treated, and the like can be configured to be the shortest. The cost can be reduced and various troubles can be suppressed by shortening the piping in which clogging or the like is likely to occur. In addition, since the installation location is close to a square, the stability at the time of installation is improved. In addition, since no special means is required for transporting the solid component and the liquid component separated by the solid-liquid separation device 20 to the compost device 30 and the water treatment tank 40, the cost can be reduced as described above. At the same time, various troubles can be suppressed.

As described above, even if the amount of air lift from the storage tank 10 is controlled to be constant every cycle, the steps immediately after the use of the disposer 3 and the steps after the air lift is performed several times are as follows. If the amount of load (the amount of organic matter) sent to the subsequent stage is different and the other treatment is always performed for a certain period of time, the water treatment efficiency does not increase much.

Therefore, in the embodiment shown in FIG.
Paying attention to the fact that there is a correlation between the solid content separated by the solid-liquid separation device 20 and the load, the solid content separated by the solid-liquid separation device 20 is used as a means for measuring the amount of the solid content. A weighing machine 31 for measuring the composting device 30 into which the compost device 30 is put is installed.
The amount of the solid is measured from the change in the weight of the sample, the load is estimated from the amount of the solid, and control according to the load is performed.

When the solids content is high, the soluble organic loading is generally high. Therefore, as a means for promoting the decomposition of the organic matter, the aeration amount of the water treatment tank 40 is increased. In addition, as described above, the storage tank 10 also has a long time (900 seconds).
In the case of a system in which organic matter is decomposed by performing the stirring and aeration (103), the stirring and aeration (103) in the storage tank 10 may be similarly increased.

Further, if the load is large, the amount of sludge generated after the decomposition treatment also increases.
It is preferable to increase the amount of sludge returned to the tank.

That is, it is not sufficient that all of them are large, but since there is an appropriate amount according to the load amount, the load amount is controlled by estimating it from the amount of solids. If the amount is too large, not only the sedimentation separation performance is reduced, but also a problem that the power consumption of the blower is wastefully consumed.

The control amount may be changed each time the estimated load amount is obtained from the solid amount measuring means (weighing scale 31), but the control amount may be changed for each fixed amount (for example, the past 3 hours).
It is also possible to judge whether the load is large or small and feed it back to the control.

For example, assuming that the weight of the composting device 30 measured by the weighing scale 31 changes as time elapses as shown in FIG. 8, the change amounts at the changing points of D, E, and F in FIG. The weight of the solid component charged into the compost device 30 is grasped.

Here, if the weight at point D is the same as the design load of the system, the load at point E is light, so the amount of aeration of the water treatment tank 40 is reduced. The amount of sludge returned from the sedimentation separation tank 50 to the storage tank 10 and the amount of stirring and aeration of the storage tank 10 are not changed.

On the other hand, since the load is heavy at point F, the amount of aeration of the water treatment tank 40, the amount of sludge returned from the sedimentation separation tank 50 to the storage tank 10, and the amount of aeration of the storage tank 10 with stirring are also increased.

The amount of aeration and the amount of sludge returned can be increased or decreased by controlling the frequency of an AC power supply for driving an aeration or return blower by an inverter or the like, controlling the ON / OFF duty ratio of the AC power supply, or controlling the drive power. It can be realized by controlling the time.

FIG. 9 shows the means for detecting the load of the liquid (water to be treated) flowing into the water treatment tank 40 in order to perform the same control as described above. A dissolved oxygen sensor 45 generally used for detecting DO) is installed in a water treatment tank 40.

Since the output of the dissolved oxygen sensor 45 has a greatly oscillated waveform as it is, a filter circuit is provided at the preceding stage in order to obtain an output as shown in FIG.

In the section tz in FIG. 10, the decomposition of the organic matter in the water treatment tank 40 proceeds by a certain amount of aeration, and the dissolved oxygen amount D0 gradually increases.

In the section t0, load inflow (solid-liquid separation device 2
Immediately before the timing of the inflow of the liquid from 0), the amount of dissolved oxygen is changed to a predetermined aeration amount used for DO measurement, and the difference G between the DO value immediately before the inflow of the load and the DO minimum value during the loading of the load is calculated. It is determined that the load is large.

In the above description, the reason why the amount of aeration is changed to a predetermined amount at the time of DO measurement is that if the amount of aeration is different, the way of drop of DO at the time of load inflow will be different. The detection accuracy is increased by using the same aeration amount every time.

The reason why the DO minimum value during the load application is not set to the value immediately before the end of the load inflow is the interval t1 or t1 in FIG.
This is because, as shown in FIG. 2, the DO value may be increased halfway due to a small flow rate.

In the section ta, the aeration amount is changed in accordance with the load amount discrimination in the section t0, and the process is proceeding. Thereafter, in the same manner as described above, the processing proceeds in the interval t1 → tb → t2.

FIG. 11 shows a water treatment tank 4 according to still another embodiment.
FIG. 5 is a schematic configuration diagram showing a water treatment tank upper limit water level sensor 46 that operates when the water level in the water treatment tank 40 rises abnormally.
The sediment is transferred from the storage tank 10 to the solid-liquid separator 20 on condition that the sensor 46 is not turned on.

The upper limit water level sensor 46 has its O
At the N water level (shown by a broken line), the water treatment tank 40 is installed at a position where the water treatment tank 40 does not overflow even when the entire amount of transfer from the storage tank 10 to the solid-liquid separation device 20 enters the water treatment tank 40. That is, it is attached so that “the surplus volume from the upper limit water level (sensor ON water level) to the overflow of the water treatment tank 40”> “the transfer amount from the storage tank 10 to the solid-liquid separation tank 20”.

Further, the upper limit water level sensor 46 is turned off.
Under these conditions, the sediment is transferred from the storage tank 10 to the solid-liquid separator 20. During the transfer, the upper limit water level sensor 46 is monitored.

The water treatment tank 40 has a sedimentation separation tank 50.
A tap water jet nozzle 47 for jetting tap water toward the entrance of the communication pipe 44 is provided. When the upper limit water level sensor 46 is turned on, the ejection nozzle 47
Thereby, the discharge port (communication pipe 44) of the water treatment tank 40 is cleaned.

The amount of water used at the time of the washing is a predetermined amount of water so that the water treatment tank 40 does not overflow.

Further, a sedimentation separation tank upper limit water level sensor (not shown) which is activated when the water level of the sedimentation separation tank 50 rises abnormally is provided, provided that the sensor is not turned on. Cleaning of the 40 outlets may be performed.

The present invention is not limited to the disposer wastewater treatment system having the structure as shown in FIG. 1. For example, the liquid separated by the solid-liquid separator is returned to the storage tank and the storage tank is returned to the storage tank. Of the supernatant liquid (water to be treated) into a water treatment tank by means of a transfer means whose transfer amount varies according to the water level such as an air lift, or a water treatment tank and a sedimentation separation tank are combined into one treatment tank. The present invention can be applied to various types of water treatment systems such as those formed by partitioning the inside with partition walls, and further can be applied to water treatment systems such as septic tanks.

[0066]

As described above, according to the present invention, the driving time of the transfer means is controlled based on the water level of the storage tank so that the transfer amount at each time is constant in accordance with the processing amount at the next stage. Therefore, the storage tank does not need to have a large capacity as in a conventional flow rate adjusting tank, but may be a small capacity and small storage tank, and the system can be downsized. In addition, since a fixed amount of transfer can be performed without using an expensive constant flow pump, the cost of the system can be reduced.

The driving time of the transfer means for each time corresponding to the predetermined water level from the predetermined upper water level to the lower water level of the storage tank is predetermined and stored, and based on the upper water level detection output of the water level detecting means, The transfer is performed at the stored first set time, and thereafter, the transfer is performed at the set time stored every time the transfer is performed. Since this need not be performed, control is simplified.

Since an upper water level sensor for detecting a predetermined upper water level of the storage tank is provided as the water level detecting means, an expensive sensor for continuously detecting the water level becomes unnecessary.
The cost of the system can be further reduced.

When the water level in the storage tank is higher than the above water level, the transfer amount per unit time is considered to be the maximum amount in the expected high water level range, and the transfer is performed at predetermined set times. , It is possible to prevent a problem that the processing amount of the next stage is exceeded.

When the water level in the storage tank is lower than the sewage level, the transfer amount per unit time is considered to be the maximum amount in the expected low water level range, and the transfer is performed at predetermined set times. By executing the above, unnecessary power consumption can be suppressed.

The above is effective when applied to a system for transferring the sediment in the storage tank to the solid-liquid separation device, but is applied to a system for transferring the water to be treated in the storage tank to the water treatment tank. It is also effective.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one embodiment of a disposer wastewater treatment system as a water treatment system according to the present invention.

FIG. 2 is a timing chart showing an embodiment of the present invention.

FIG. 3 is a schematic configuration diagram for explaining an installation position and the like of a water level sensor in the storage tank of the embodiment.

FIG. 4 is a characteristic diagram showing a relationship between a water level of the storage tank and a time required for a certain amount of air lift.

FIG. 5 is a diagram showing a table of operation times of respective processes predetermined based on the above-mentioned characteristic diagram.

FIGS. 6A and 6B are schematic configuration diagrams illustrating an example of the arrangement of each component of the embodiment, wherein FIG. 6A is a top view, FIG. 6B is a side view, and FIG.

7A and 7B are schematic configuration diagrams illustrating another embodiment, in which FIG. 7A is a top view, FIG. 7B is a side view, and FIG. 7C is a front view.

FIG. 8 is a diagram showing an example of a change in the weight of the compost device measured by a weigh scale in the embodiment of FIG. 7;

FIG. 9 is a schematic configuration diagram showing a water treatment tank in still another embodiment, (a) is a top view, (b) is a side view, and (c) is a front view.

FIG. 10 is a diagram showing an example of an output waveform of the dissolved oxygen sensor in FIG. 9;

FIG. 11 is a schematic configuration diagram showing a water treatment tank according to still another embodiment, (a) is a top view, (b) is a side view, and (c).
Is a front view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sink 2 sink 3 disposer 10 storage tank 11, 51 air lift pipe 12, 14, 42, 52, 54 blower 13, 41, 53 diffuser pipe 15 upper water level sensor 16 lower water level sensor 17 upper limit position sensor 20 solid-liquid separator 30 compost (Composting) apparatus 31 weighing scale 40 water treatment tank 43 carrier 44 communication pipe 45 dissolved oxygen sensor 46 upper limit water level sensor 47 tap water jet nozzle 50 sedimentation separation tank 55 drainage pipe

Continued on the front page (72) Inventor Toshihiro Tamura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Jun Yoshida 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Norimasa Sakamoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (7)

[Claims] 1. A storage tank for storing the water to be treated, a transfer means for changing a transfer amount for transferring the sediment and the water to be treated in the storage tank to a next processing section in accordance with a water level, and Water level detection means for detecting the water level in the tank, and control for controlling the drive time of the transfer means based on the water level detected by the water level detection means so that the transfer amount is constant each time in accordance with the processing amount of the next stage. And a water treatment system. 2. The method according to claim 1, wherein a predetermined drive time of the transfer means corresponding to a predetermined water level from a predetermined upper water level to a lower water level of the storage tank is stored in advance, and the control means controls the water level detection means. 2. The transfer according to claim 1, wherein the transfer is performed at the stored first set time based on the water level detection output, and thereafter, the transfer is performed at the stored set time every time the transfer is performed. Water treatment system. 3. The water treatment system according to claim 2, further comprising a water level sensor for detecting a predetermined water level of the storage tank as said water level detecting means. 4. When the water level of the storage tank is higher than the water level, the control means considers that the transfer amount per unit time is the maximum amount of the expected high water level range and determines the predetermined amount. The water treatment system according to claim 2 or 3, wherein the transfer is performed at set time intervals. 5. When the water level of the storage tank is lower than the sewage level, the control means considers that the transfer amount per unit time is the maximum amount of the expected low water level range, and determines the predetermined amount. The water treatment system according to any one of claims 2 to 4, wherein the transfer is performed at set time intervals. 6. The control means for controlling a driving time of a transfer means for transferring a precipitate in the storage tank to a solid-liquid separation device for separating the precipitate into a solid component and a liquid component.
A water treatment system according to claim 5. 7. The control unit according to claim 1, wherein the control unit controls a driving time of a transfer unit that transfers the water to be treated in the storage tank to a water treatment tank for purifying the water to be treated. A water treatment system according to claim 1.