JPS5843996Y2 - Sewage treatment equipment - Google Patents

Description

[Detailed description of the invention] This invention improves the treatment method adopted in conventional large-scale sewage treatment equipment, etc., and provides a compact and highly stable treatment system suitable for domestic wastewater treatment mainly in households. The present invention relates to a sewage treatment device for obtaining water.

Today's water pollution in rivers and the like is often caused by household wastewater, and the need for wastewater treatment is increasing.

Traditionally, sewage treatment equipment has been used to treat large amounts of sewage discharged from apartment buildings, etc., but it has only been used in limited areas to treat wastewater from individual households, and this has resulted in pollution. This is a major factor.

The reason why it was not adopted by each household was that simply miniaturizing the treatment method of large sewage treatment equipment could not be put into practical use due to product price, installation space, and maintenance costs, and This was due to technical problems such as large fluctuations and difficulty in achieving stable performance.

Domestic wastewater has large fluctuations in water quantity and quality, so in order to obtain stable purified water, it is necessary to adjust the water quantity and quality within a predetermined range in the pre-treatment process, and then treat it in the next treatment process. .

Conventionally, pre-treatment processes include a separation septic chamber, a flow rate adjustment chamber,
Although a flow rate adjustment device is used, conventional separate septic chambers have two methods: one in which all household wastewater flows into the separated septic chamber and is subjected to anaerobic treatment, and the other is in which only toilet sewage flows into the separated septic chamber and is then subjected to anaerobic treatment. There are two methods in which the water is mixed with gray water in a flow rate adjustment room.

However, since the former has a large amount of sewage, the inside of the separated septic chamber is easily agitated, and a large capacity is necessary to carry out anaerobic treatment, and the latter has only urine and urine sewage, so anaerobic treatment is required in the separated septic chamber. Furthermore, high concentration kitchen sewage is introduced into the flow rate adjustment chamber without being treated at all in the pre-treatment process, increasing the load on the next treatment process.

Therefore, a combination of only these conventional techniques has the disadvantage that the entire device becomes large and cannot be applied as a domestic sewage treatment device.

The present invention was developed in view of the above-mentioned drawbacks, and in order to efficiently carry out anaerobic treatment in a separated septic chamber with a small capacity, the separated septic chamber is divided into a separation chamber and a digestion chamber.
Toilet sewage and kitchen sewage are flowed into the separation chamber to create a sewage component composition (C/N-=10) suitable for anaerobic treatment, and separated in the separation chamber to efficiently process the sewage that has settled in the digestion chamber. At the same time, low-contamination sewage from baths, laundry, washrooms, etc. is directly flowed into the flow rate adjustment chamber, and the sewage is separated in the separation and septic chamber and mixed with anaerobically treated sewage to adjust the flow rate. The aim is to provide a sewage treatment device that can obtain highly stable treated water with a small volume by adjusting the flow rate with the device and stabilizing the load on the contact oxidation chamber in the next treatment process. It is something.

An embodiment of the present invention will be described based on FIGS. 1 to 6.

In FIGS. 1 and 2, the upper tank body 29 and the lower tank body 3
The interior of the tank, which is composed of Two contact oxidation chambers 6, precipitation chambers 7 and disinfection chambers 8 are divided into sections,
The interior of the separation septic chamber 1 is further divided into a separation chamber 2 and a digestion chamber 3 by a partition wall 12 and a partition wall 13, and inside the separation chamber 2, there is a middle upper part between an inflow pipe 9 and an advection pipe 10. baffle 14
toilet sewage and kitchen sewage flow into the separation chamber 2 from the inflow pipe 9 provided in the lower tank main body 30, solids are separated by precipitation in the separation chamber 2, and the separated solids are precipitated in the digestion chamber 3. Perform anaerobic treatment.

Then, floating substances such as fats and oils in the wastewater float on the water surface on the inflow pipe 9 side partitioned by the baffle 14 in the separation chamber 2 above the precipitated solids, and also on the advection pipe 10 side in the separation chamber 2. The separated liquid from which the precipitable solids and floating substances have been removed is advected to the flow rate adjustment chamber 4.

It should be noted that mixing urine, urine and kitchen sewage is difficult because if only urine and urine sewage is used, the C/N in the sewage is small and the efficiency of anaerobic biological treatment is low. The purpose is to improve the efficiency of anaerobic biological treatment by mixing wastewater.

When there are few floating substances in the wastewater, the baffle 14 is not necessary, and it is sufficient to provide the suction port of the advection pipe 10 below the water surface.

The flow rate adjustment room 4 is divided into two rooms by a partition wall 16 having a filtration net 26, and wastewater from the advection pipe 10 from the separated septic room 1 and the inflow pipe 11 for bath, laundry, and washroom wastewater is introduced into one room. A flow rate adjustment device 17 is disposed in the other chamber, and the flow rate adjustment device 17 pumps water and advects a certain amount of water to the first catalytic oxidation chamber 5.

Although the flow rate adjustment device 17 is a three-type air lift pump type flow rate adjustment device in this embodiment, it may be of a similar type.

When an air lift pump type flow rate adjustment device is used, there is an advantage that the exhaust air from the catalytic oxidation chamber can be used and it can be operated with a single blower.

Furthermore, if there are few impurities in the dirty water for bathing, washing, and washing hands, the partition wall 16 having the filtering net 26 is not necessary.

The first contact oxidation chamber 5 includes a shelf-type contact oxidation filter medium 24 made of a plastic net fixed at an appropriate location, a guide plate 31 for improving indoor circulation, and a guide plate on the opposite side of the contact oxidation filter medium 24. 31, the wastewater is circulated by the air ejected from the aeration pipe 27, and the wastewater is purified by the microorganisms living on the contact oxidation filter medium 24.

The contact oxidation filter medium does not necessarily have to be a tray flow type, but
By using the tray flow type, since the tray flow type itself has a high sludge holding power, a large processing capacity can be obtained with a small capacity, and there is an advantage that the catalytic oxidation chamber 5 can be made smaller.

The wastewater treated in the first catalytic oxidation chamber 5 is
A communication hole provided at the bottom of the partition wall 19 that partitions the second catalytic oxidation chamber 6 allows the flow of wastewater to the second catalytic oxidation chamber 6. Short passes can be prevented.

The second contact oxidation chamber 6 includes a plate-type contact oxidation filter 25 made of a fixed plastic net attached to an appropriate location, a guide plate 32 for improving indoor circulation, and a guide plate on the opposite side of the contact oxidation filter 25. 32 and further purifies the wastewater from the first catalytic oxidation chamber 5.

,, . The sedimentation chamber 7 is partitioned by a partition wall 20 having a communication hole at the bottom, and the fine solids contained in the wastewater purified in the second contact oxidation chamber 6 are separated by sedimentation, and are separated by a partition wall 20 having a communication hole at the bottom of the partition wall 20. It is then returned to the second catalytic oxidation chamber 6.

The wastewater from which solids have been removed in the settling chamber 7 is transferred to the disinfection chamber partition wall 21.
The water overflows into the disinfection chamber 8 which is divided into sections, is disinfected by the disinfection cylinder 22, mixed in the disinfection chamber 8, and then discharged from the outflow pipe 23.

Since the present invention has the above-mentioned configuration, the C/N of wastewater suitable for anaerobic biological treatment is achieved by allowing toilet floor urine wastewater and kitchen wastewater, which account for most of the pollutants in domestic wastewater, to flow into the separation septic chamber. In addition, since the separation chamber and the digestion chamber are divided into the separate septic chamber, the sedimentation and separation of solids in the inflowing sewage is reliably carried out, and the settled sludge from the digestion chamber is separated from the inflow. Since the sewage is allowed to stand unaffected by the water flow, effective purification is possible in a small-capacity separate septic chamber, which also reduces the burden on subsequent treatment processes.

Then, in the flow rate adjustment room, the separated liquid from the separated septic room is poured into a bath.
The mixture is diluted and homogenized with less contaminated waste water from laundry, hand washing, etc., and the flow is quantitatively advected to the contact oxidation chamber for the next treatment process using a flow rate adjustment device, eliminating load fluctuations to the contact oxidation chamber and reducing the small capacity. Effective purification is now possible in a catalytic oxidation chamber.

Furthermore, since a double-membrane air lift pump type flow rate regulator is used as the flow rate regulator, it is possible to divert a portion of the aeration air from the catalytic oxidation chamber, allowing operation with a single blower and removing sewage. This has the advantage of significantly reducing the labor involved in installing processing equipment, reducing product costs, and reducing the cost burden on users.

In addition, if a plate-flow type contact oxidation filter medium is used as the filter medium for contact oxidation, the capacity of the catalytic oxidation chamber can be reduced because the plate-flow type contact oxidation filter medium has a high sludge retention capacity. In addition, the capacity of the settling chamber can be reduced, which has the effect of making it possible to downsize the entire sewage treatment device.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a plan view with the upper tank main body 29 of Fig. 1 removed, and Fig. 3
The figure is a left side view, Figure 4 is a right side view, and Figure 5 is A of Figure 1.
-A cross-sectional view, Figure 6 is a B-B cross-sectional view of Figure 1, Explanation of symbols 1...Separated septic chamber, 2...
・Separation chamber, 3... Digestion chamber, 4... Flow rate adjustment chamber, 5... First contact oxidation chamber, 6...
・Second contact oxidation chamber, 7...Precipitation chamber, 8...
...Disinfection room, 9...Inflow pipe, 10...
Advection pipe, 11... Inflow pipe, 12... Partition wall, 13... Partition wall, 14... Baffle, 15... Partition Wall, 16... Partition wall, 17... Flow rate adjustment device, 18...
Partition wall, 19... Partition wall, 20... Partition wall, 21... Disinfection room partition wall, 22...
・Disinfection room, 23...Outflow pipe, 24...
Contact oxidation filter medium, 25... Contact oxidation filter medium, 26.
...Filtering net, 27...Diffusion cylinder, 28...
...Diffusion cylinder, 29... Upper tank body, 30...
... Lower tank body, 31 ... Guide plate, 32.
...Power board.

Claims (1)

[Scope of Claim for Utility Model Registration] In a sewage treatment system for domestic wastewater consisting of several 16-minute separation chambers, a flow rate adjustment chamber, multiple contact oxidation chambers, a precipitation chamber, and a disinfection chamber, the separation and septic chamber is separated into the upper part by a partition wall. A disinfection chamber is divided into the lower part of the chamber, and an inlet for toilet sewage and kitchen sewage and an advection port to the flow rate adjustment chamber are arranged on the wall of the separation chamber. An inlet and a flow rate adjustment device for bath, laundry, and hand washing waste water are arranged in the chamber, and the outlet of the flow rate adjustment chamber is made to discharge into the first contact oxidation chamber, and a partition wall having a communication hole is provided. A filter medium for catalytic oxidation and an aeration pipe are installed in each of the divided catalytic oxidation chambers, and a partition wall having a communication hole at the bottom is used to separate the final catalytic oxidation chamber and the precipitation chamber. A sewage treatment device characterized by having a disinfection chamber located at a certain location. 2. Utility model registration claim 1, characterized in that the flow rate adjustment device is a multi-disc air lift pump flow rate adjustment device
Sewage treatment equipment as described in section. 3. The sewage treatment apparatus according to claim 1, wherein the catalytic oxidation filter is a tray-type catalytic oxidation filter.