JPH05293484A - Sewage treatment apparatus - Google Patents

Abstract

PURPOSE:To treat domestic sewage efficienly and stabilize the water quality of released water. CONSTITUTION:A sewage treatment apparatus is provided with a first an-aerobic chamber 2 which is allowed to communicate with a route 1 for high load sewage which is from a kitchen and toilets and contains solid substances and has high treatment load. It is also provided with a second anaerobic chamber 4 which is allowed to communicate with a route 3 for low load sewage which is from bathtubs and lavatories and contains few solid substances. The first anaerobic chamber 2 and the second anaerobic chamber 4 are allowed to communicate with a secondary anaerobic chamber 5. The flowing out of the first anaerobic chamber 2 to the secondary anaerobic chamber 5 is carried out in the overflowing way based on the water level difference. The flowing out of the second anaerobic chamber 4 to the secondary anaerobic chamber 5 is carried out in the way the liquid is pumped by a quantitative pump and made to flow quantitatively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus for treating domestic sewage, and more particularly to a technique for efficiently treating domestic sewage and stabilizing the quality of discharged water. is there.

[0002]

2. Description of the Related Art Conventionally, a sewage treatment tank Aa installed in a home
As shown in FIG. 10, it was introduced from the bathroom, washroom, kitchen, toilet, etc. into the primary anaerobic chamber b using the common pipe a. Then, in FIG. 10, sewage is discharged from the common pipe a to the primary anaerobic chamber b, the secondary anaerobic chamber 5, the aeration chamber 7, and the disinfection chamber 8.

[0003]

However, the structural design and guidelines of the sewage treatment tank Aa do not set the maximum inflow of sewage from all locations, so if the maximum inflow of sewage all at once, the treatment capacity will be exceeded. However, there is a problem that the untreated water is discharged, the discharged water is deteriorated, and the environment is deteriorated. That is, as shown in FIG. 11, the inflow of sewage increases during the breakfast time, the lunch / washing time, and the dinner / bathing time, as shown in FIG.
As shown in 2, the water is often released beyond the standard BOD.

The present invention has been made in view of the above problems, and an object of the present invention is to increase the treatment load in domestic sewage, which contains solid substances like sewage from kitchen and toilet. (BOD is high) It takes a long time for treatment, but a large amount of sewage does not flow in all at once, and there is little treatment loss (less BOD) because solid substances are not included like in bathrooms and washrooms. Focusing on the sewage system into which a large amount of sewage flows at once, treating these with another system, as a result, it is possible to efficiently treat domestic sewage and stabilize the quality of discharged water. There is an attempt to provide a processing tank.

[0005]

The present invention is a sewage treatment apparatus for treating domestic sewage, which is a high-load sewage path 1 that contains solids and has a high treatment load, such as a kitchen and a toilet.
The first anaerobic chamber 2 and the second anaerobic chamber 4 which communicate with the low-load sewage passage 3 that does not contain solids and communicates with each other, such as a bathroom or a washroom. The anaerobic chamber 4 is communicated with the secondary anaerobic chamber 5, and the advection from the first anaerobic chamber 2 to the secondary anaerobic chamber 5 is performed in the form of overflow due to the water level difference. The advection to the chamber 5 is characterized by being configured so as to admit a fixed amount by the constant amount pump 6.

[0006]

The high-load sewage containing solids and having a high processing load, such as in kitchens and toilets, flows into the first anaerobic chamber 2 from the high-load sewage path 1. Low-load sewage that does not contain solids, such as bathrooms and washrooms, is transferred from the low-load sewage route 3 to the second anaerobic chamber 4.
Flow into. In this way, it is possible to prevent the high load wastewater from being mixed with the low load wastewater into which a large amount of wastewater flows at once. Then, the high-load sewage is sufficiently treated in the first anaerobic chamber 2 over a period of time to be transferred to the secondary anaerobic chamber 5 by overflow. Then, a fixed amount of the low load sewage is transferred to the secondary anaerobic chamber 5 by the fixed amount pump 6. Then, the high load wastewater and the low load wastewater are effectively anaerobically treated to stabilize the discharged water. In such a case, the metering pump 6 allows the low-load sewage containing a small amount of solid matter to be advected in a fixed quantity to avoid troubles due to clogging of the solid matter in the metering pump 6.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, high-load sewage that contains solids such as kitchen and toilet and has a high BOD and a high treatment load is transferred to the sewage treatment tank A through the high-load sewage route 1. I am doing it. The low-load sewage, which does not contain solids and has a low BOD and a low treatment load, is transferred to the sewage treatment tank A through the low-load sewage path 3 unlike in a bathroom or a washroom. In the sewage treatment tank A, the first anaerobic chamber 2 is formed in communication with the high-load sewage passage 1, and the second anaerobic chamber 4 is formed in communication with the low-load sewage passage 3.
The first anaerobic chamber 2 and the second anaerobic chamber 4 are in communication with the secondary anaerobic chamber 5. An aeration chamber 7, a precipitation separation chamber 9 and a disinfection chamber 8 are formed on the downstream side of the secondary anaerobic chamber 5, and the treated water is discharged through an outlet 11
It is designed to be released from.

The advection from the first anaerobic chamber 2 to the secondary anaerobic chamber 5 is carried out in the form of overflow due to the water level difference. The advection from the second anaerobic chamber 4 to the secondary anaerobic chamber 5 is carried out by the metering pump 6 in a constant quantity. Then,
High-load sewage that contains solids and has a high processing load, such as in kitchens and toilets, flows into the first anaerobic chamber 2 from the high-load sewage path 1, and contains solids such as in bathrooms and washrooms. Instead, the low-load wastewater flows into the second anaerobic chamber 4 from the low-load wastewater path 3. In this way, it is possible to prevent the high-load wastewater from being mixed with the low-load wastewater into which a large amount of wastewater flows at once. Then, the high-load sewage is sufficiently treated in the first anaerobic chamber 2 over a period of time to be transferred to the secondary anaerobic chamber 5 by overflow. Then, the low load sewage is admitted to the secondary anaerobic chamber 5 in a fixed amount by the constant amount pump 6. Therefore, the high load wastewater and the low load wastewater are effectively anaerobically treated to stabilize the discharged water. In such a case, the metering pump 6 allows the low-load sewage containing a small amount of solid matter to be advected in a fixed quantity to avoid troubles due to clogging of the solid matter in the metering pump 6.

FIG. 3 shows the total amount of discharged wastewater. FIG. 4 shows an inflow situation of sewage from the bathroom or washroom to the second anaerobic chamber 4. FIG. 5 shows the state of advection from the second anaerobic chamber 4 to the secondary anaerobic chamber 5. In such a case, the fixed amount is admitted by the fixed amount pump 6 for 24 hours. Figure 6 shows the kitchen
The situation of inflow of dirty water from the toilet to the first anaerobic chamber 2 is shown. FIG. 7 shows a state of advection due to overflow from the first anaerobic chamber 2 to the secondary anaerobic chamber 5. FIG. 8 shows an inflow situation of sewage from the first anaerobic chamber 2 and the second anaerobic chamber 4 to the secondary anaerobic chamber 5. Figure 9 shows B of the water discharged from the sewage treatment tank A
It shows the OD emission amount, and it can be seen that the BOD emission is stabilized by leveling the inflow amount of sewage.

[0010]

Industrial Applicability As described above, the present invention can be applied to the first anaerobic chamber, which is connected to the high-load sewage path containing a solid substance and having a high processing load, such as a kitchen and a toilet, and a bathroom or a washroom. A second anaerobic chamber, which does not include solid matter and is in communication with the low-load sewage path, wherein the first anaerobic chamber and the second anaerobic chamber are in communication with the secondary anaerobic chamber, and the first anaerobic chamber to the secondary anaerobic chamber The advection to the river should be carried out in the form of overflow due to the water level difference.
Since the advection from the second anaerobic chamber to the secondary anaerobic chamber is configured to quantitatively advect with a metering pump, high-load sewage that contains solids and has a high processing load, such as kitchen and toilet, is high-load sewage. The low-load sewage that flows into the first anaerobic chamber from the route, and does not contain solids such as in bathrooms and washrooms, flows into the second anaerobic chamber from the low-load sewage route, and a large amount of sewage flows in at once. Avoid mixing high load wastewater with low load wastewater
High-load sewage is sufficiently treated in the first anaerobic chamber over time and is transferred to the secondary anaerobic chamber by overflow, and low-load sewage is quantitatively transferred to the secondary anaerobic chamber by a metering pump. However, there is an advantage that the high load wastewater and the low load wastewater can be effectively anaerobically treated to stabilize the discharged water. Moreover, since the metering pump quantitatively adsorbs sewage that does not contain solids, it is possible to avoid damage to the metering pump due to clogging of solids, and also to avoid clogging of solids in the piping system of the low-load sewage path. There is an advantage that the piping system can be downsized and simplified.

[Brief description of drawings]

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

FIG. 2 is a schematic perspective view of the above wastewater treatment tank.

FIG. 3 is a graph showing the total amount of discharged wastewater in the above.

FIG. 4 is a graph showing an inflow situation of sewage from the bathroom and washroom to the second anaerobic chamber in the above.

FIG. 5 is a graph showing a state of advection from the second anaerobic chamber to the secondary anaerobic chamber of the above.

FIG. 6 is a graph showing an inflow situation of sewage from the kitchen and the toilet in the same as above to the first anaerobic chamber.

FIG. 7 is a graph showing a state of advection due to overflow from the first anaerobic chamber 2 to the secondary anaerobic chamber of the above.

FIG. 8 is a graph showing an inflow situation of sewage from the first anaerobic chamber 2 and the second anaerobic chamber to the secondary anaerobic chamber of the above.

FIG. 9 is a graph showing the BOD emission status of the same as above.

FIG. 10 is a system diagram of conventional wastewater treatment.

FIG. 11 is a graph showing a situation of inflow of sewage into the sewage treatment tank of the above.

FIG. 12 is a graph showing the situation of discharge of treated water in the above.

[Explanation of symbols]

 1 High load sewage route 2 1st anaerobic chamber 3 Low load sewage route 4 2nd anaerobic chamber 5 Secondary anaerobic chamber 6 Metering pump

Claims (1)

[Claims] 1. A sewage treatment apparatus for treating domestic sewage, comprising: a first anaerobic chamber, such as a kitchen and a toilet, which communicates with a high-load sewage path containing a solid matter and having a high treatment load.
A second anaerobic chamber, which does not contain solids and communicates with a low-load sewage path such as a bathroom or a washroom, is provided with a first anaerobic chamber and a second anaerobic chamber.
The anaerobic chamber is communicated with the secondary anaerobic chamber, and the advection from the first anaerobic chamber to the secondary anaerobic chamber does not occur in the form of overflow due to the water level difference. A sewage treatment apparatus characterized in that it is configured to transfer a fixed amount by a constant pump.