JP4864638B2 - Combined sewage treatment system - Google Patents

Description

The present invention relates to a combined sewage treatment system, and in particular, it corresponds to an increase or decrease in the amount of sewage flowing into a sewage treatment plant without increasing the head loss due to an automatic dust remover installed in a sewage / rainwater treatment pond serving as a branch waterway. The present invention relates to a combined sewage treatment system that removes fine impurities in inflow sewage.

  Conventionally, a combined sewage treatment system installed in a sewage treatment plant is designed to allow sewage and rainwater discharged from a household to join and flow into the sewage treatment plant, and to an automatic dust remover installed in the sewage treatment plant. In addition, after removing impurities of a predetermined size, waste sand flowing in with rainwater or the like is precipitated and treated.

  In the combined sewage treatment system, the amount of inflow flowing into the sewage treatment plant varies greatly according to the amount of precipitation. For this reason, in the sewage treatment plant, multiple treatment ponds with fine automatic dust removers installed in each treatment pond are arranged side by side, and the number of treatment basins to be drained is changed according to the inflow amount, so that a small inflow amount to a large inflow amount Can be processed correspondingly.

  However, the screen width of the automatic dust remover installed in each treatment pond is about 25 mm, for example, so that it can cope with an increase in the amount of rainwater flowing in during rain. When dusts that are finer than the screen width of the dust remover flow in, there is a problem that they are discharged almost completely from the treatment plant to rivers and the like, which damages the landscape and causes other problems.

  Moreover, if a fine automatic dust remover having a fine screen width is installed in the treatment pond instead of the fine automatic dust remover so as to remove even fine impurities, the water loss due to the fine automatic dust remover is large. As a result, the water level upstream of the fine automatic dust remover rises due to the influence of the backwater, causing damage such as inundation.

In view of the problems of the combined sewage treatment system, the present invention can reduce the amount of sewage flowing into the sewage treatment plant without increasing the head loss due to the automatic dust remover installed in the sewage / rainwater treatment pond as a branch waterway. An object of the present invention is to provide a combined sewage treatment system capable of removing fine impurities in inflow sewage in accordance with the increase and decrease.

To achieve the above object, merging sewer treatment system of the present invention, as branches than the inflow water channel sewage-stormwater pond installed an automatic dust remover plurality juxtaposed, processes the sewage and rainwater flows drilled in the merged sewer treatment systems, among the plurality of wastewater, stormwater ponds, minutia automatic dust remover on the upstream side of the at least one sewage-stormwater Ikeuchi, a required spacing fine eyes automatic dust remover downstream thereof It is characterized in that only a fine automatic dust remover is installed downstream of other sewage and rainwater treatment ponds .

  In this case, the fine dust automatic dust remover can capture impurities in the water with a circulating screen and collect the captured impurities in a discharge chute on the water.

The fine automatic dust remover installed in other sewage / rainwater treatment ponds has a screen width of 12-18mm, and the fine automatic dust remover in the sewage / rainwater treatment ponds equipped with fine automatic dust removers and fine automatic dust removers. The screen width can be set to 22 to 28 mm.

Moreover, the wastewater-rainwater阻水door which to perform the Rohm wastewater-stormwater ponds can be disposed at the inlet portion of the sewage-stormwater ponds.

In addition, from the sewage / rainwater treatment pond where fine automatic dust removers and fine automatic dust removers are installed, water is sequentially passed through to other sewage / rainwater treatment ponds where only fine automatic dust removers are installed in response to the increase in inflow water volume. A sewage / rainwater blocking door can be provided at the entrance of each sewage / rainwater treatment pond.

According to the combined sewage treatment system of the present invention, a sewage / rainwater treatment pond provided with an automatic dust remover is branched from an inflow water channel, and a plurality of the sewage and stormwater are treated in parallel. in the system, among the plurality of wastewater, stormwater ponds, minutia automatic dust remover on the upstream side of the at least one sewage-stormwater Ikeuchi, a fine eye automatic dust remover installed at a predetermined interval on the downstream side, the other by installing a downstream wastewater-stormwater Ikeuchi particulars automatic dust remover only, in at least one wastewater-stormwater ponds, after removing the previously large contaminants on the upstream side of the fine automatic dust remover is removed The fine dust that has not been captured will be captured and removed by the screen of the fine automatic dust remover, preventing clogging of the fine automatic dust remover and increasing the upstream water level of the fine automatic dust remover. Suppression Fine contaminants flowing Te can be effectively removed.

  In addition, it is included in rainwater and sewage that flows in continuously by capturing fine impurities in the water with a circulating screen and collecting the collected impurities in a discharge chute on the water. Since the contaminants that are generated are sequentially scraped and discharged by the circulating screen, the contaminants can be removed efficiently and continuously without clogging the automatic dust remover.

The fine automatic dust remover installed in other sewage / rainwater treatment ponds has a screen width of 12-18mm, and the fine automatic dust remover in the sewage / rainwater treatment ponds equipped with fine automatic dust removers and fine automatic dust removers. By setting the screen mesh width to 22 to 28 mm, it is possible to prevent clogging of the fine automatic dust remover and effectively suppress fine impurities flowing in by suppressing the rise of the upstream water level of the fine automatic dust remover. Can be removed.

Further, a large amount of flowing sewage, rainwater阻水door which to perform the Rohm wastewater-stormwater ponds, by arranging the inlet of the wastewater-stormwater pond during rain early first flush It is possible to efficiently remove impurities.

In addition, from the sewage / rainwater treatment pond where fine automatic dust remover and fine automatic dust remover are installed, water is sequentially passed to other sewage / rainwater treatment ponds where only automatic dust remover is installed in response to the increase in inflow water volume. By installing the sewage / rainwater blocking doors at the entrance of each sewage / rainwater treatment pond, even if the amount of stormwater flowing in during rainfall increases, other sewage / The treatment can be reliably performed by sequentially passing water through the rainwater treatment pond.

  Embodiments of a combined sewage treatment system according to the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of a combined sewage treatment system of the present invention.
The combined sewage treatment system of the present invention is not particularly limited. For example, as shown in FIG. 1, sewage discharged from a home and rainwater are merged and flow into a sewage treatment plant. A plurality of sewage / rainwater treatment ponds 21, 22,..., 26 and one branch waterway 3 are arranged so that the end portion of the inflow waterway 1 branches into a plurality, and the branch waterway 3 is directly treated as sewage. together so as to flow into the sewage in the soil water treatment pond 4 flowing connected to the processing battery 4, a plurality of other wastewater-stormwater ponds 21, 22 ..., fine automatic dust removal machine in the 26 5,5 'set up, and the sewage-stormwater ponds 21, ..., so as to parallel arranged 26, the fine automatic dust remover 5, 5' each wastewater-rainwater was installed the end of the treatment ponds connected to the wastewater-rainwater water guide sewer 7, sewage, rainwater under water after contaminant removal So as to introduce into the sewage, rain water pump well 8 through the Mizumizo 7.

Each wastewater, stormwater ponds 21, 22 is branched from the water passage, ..., the 26, the wastewater-rainwater阻水door 10 selectively opens and closes to the inlet portion and the sewage-stormwater ponds 22, ..., is placed minutia automatic dust remover 5 'to the downstream region 26, out of the wastewater, stormwater ponds, at least one thereof, for example, the wastewater-stormwater ponds 21, particulars automatic dust removal Two automatic dust removers, a machine 5 and a fine automatic dust remover 6, are installed.
When installing two automatic dust removers, a fine automatic dust remover 5 and a fine automatic dust remover 6, in the sewage / rainwater treatment pond 21 serving as one branch water channel, an upstream in the sewage / rainwater treatment pond 21. The fine automatic dust remover 5 is installed on the side, and the fine automatic dust remover 6 is installed on the downstream side at a predetermined interval.

More specifically, in this embodiment, a plurality of sewage / rainwater treatment ponds 21, 22,..., 26 branched from the inflow water channel 1 are arranged in parallel along the branch water channel 3, and Each of the sewage / rainwater treatment ponds 21, 22,..., 26 is divided into two at the center portion, and the inlet portion of each sewage / rainwater treatment pond is formed at both ends thereof, and the drainage port portion is formed at the center portion. The two sewage / rainwater treatment ponds 21 and 24, 22 and 25, 23 and 26 facing each other along the same axis are connected to each other and the sewage / rainwater treatment ponds in the other rows are electrically connected. this was to be connected to a wastewater-rainwater water guide sewer 7, connects the sewage-rainwater pump well 8 which is disposed a plurality of sewage-rainwater pump 9 to the end of the wastewater-rainwater water guide sewer 7.
Under this case, so as to connect the one further branching the branch water passage 3 connected to the sewage treatment ponds 4 to sewage treatment ponds 4, the other to wastewater-stormwater ponds 24, 25 and 26 of the rear row side Try to introduce water.
Note that the sewage-stormwater ponds 21, 22, 23 of the front row side, so that directly branches the inflow water channel 1 in connection with these sewage-stormwater ponds directly introducing sewage from flowing water channel 1 .

The wastewater treatment pond 4 connected to the ends of the branch water passage 3, a sewage阻水door 11 be similarly selectively opening and closing the wastewater-stormwater ponds to the intake opening, on the sewage treatment ponds 4 basin The sewage automatic dust remover 12 is installed in each.
In addition, a sewage pump well 14 having a plurality of sewage pumps 13 is disposed at the end of the sewage treatment pond 4 and the sewage pump well 14 and the sewage / rainwater pump well 8 can be opened and closed. It is made to connect via.

The fine automatic dust removers 5 and 5 'and the sewage automatic dust remover 12 are not particularly limited. For example, a conventionally known front-falling front-side lifting type dust remover or a screen circulation type as shown in FIG. A dust remover is employed, and the fine automatic dust remover 6 is not particularly limited. For example, a screen circulation dust remover as shown in FIG. 3 can be employed.
The fine automatic dust remover 5 installed in the sewage / rainwater treatment pond 21 has a screen width of 12 to 18 mm (in this embodiment, around 15 mm), and the other sewage / rainwater treatment ponds 22, 23,. .., the fine automatic dust remover 5 'and the sewage automatic dust remover 12 installed at 26 have a screen mesh width of 22 to 28 mm (in this embodiment, around 25 mm), and the fine automatic dust remover 6 The screen mesh width is set to 4 to 8 mm (in this embodiment, around 6 mm).
Screen circulating dust remover for use as a fine eye automatic dust remover 6 (fine automatic dust remover 5, 5 'and sewage automatic dust collector 12) captures the water 夾 matters by screen S circulating, captured 夾 Miscellaneous things and is intended to recover the chute T in water, by injecting wash water or air to the screen S, provided contaminants and unloading nozzle N to Datsuni the 夾 matters to strike from the screen S.

For example, as shown in FIG. 3, the screen circulation type dust remover forms an endless screen S by linking screen panels P in which a large number of screen plates are arranged in a comb-like shape, and the endless screen S together with water in the lower inner is stretched arranged to flow, by circulating the endless screen S, the chute which is disposed a 夾 matters were captured by a screen panel P at the top inside of the screen S I try to let it fall.
The screen S is circulated by a conveyor chain C driven along the rail R by the sprocket W. Also, larger 夾 miscellaneous products by claws projecting from the inner side of the screen plate constituting the screen panel P is also possible to raise scratching to top.

A plurality of foreign matter unloading nozzles N are installed in the upper part of the screen circulation dust remover so as to face the screen S from the outside, and spray high-pressure water or compressed air from the outside of the screen S on the water. it allows the trapped 夾 matters and Datsuni from the screen S, so that drop jetted into the chute.

Next, the operation of the combined sewage treatment system of the present invention will be described.
When the amount of sewage flowing into the sewage treatment plant via the inflow channel 1 is small and can be treated in one sewage / rainwater treatment pond 21 or in the case of the first flush at the beginning of the rainy season when a large amount of contaminants flows, FIG. As shown, only the sewage / rainwater blocking door 10 of the sewage / rainwater treatment pond 21 in which two automatic dust eliminators 5 and 6 are installed, and the other sewage / rainwater is opened. When the sewage / rainwater blocking door 10 of the treatment ponds 22,... 26 is closed and all of the sewage blocking doors 11 of the sewage treatment tank 4 connected to the end of the branch water channel are fully opened, the inflow channel 1. under water flowing through is partially in wastewater-stormwater ponds 21 that were installed two automatic dust remover, a portion flows into the sewage treatment ponds 4 through the branch water passage 3.

This wastewater-stormwater ponds sewage flowing into the 21, at specifics automatic dust remover 5 is first disposed on the upstream side, a relatively fine contaminants above a predetermined screen cell width is trapped by the screen, It is removed by being discharged into the chute. The fine impurities less than the screen width of the fine automatic dust remover that have not been removed by the fine automatic dust remover 5 further flow down in the sewage / rainwater treatment pond 21 to the downstream fine automatic dust remover 6. Reach.
The screen width of the fine automatic dust remover 6 is not particularly limited because it is a predetermined fine value that does not cause a problem on the landscape. For example, it is about 6 mm. Fine impurities are captured by the screen S of the fine automatic dust remover 6 and removed so as to be discharged into the chute.

In this way, when fine impurities are removed by the fine automatic dust remover 6, fine fine dust has already been removed by the fine automatic dust remover 5 on the upstream side thereof, so that the loss due to the fine automatic dust remover 6 is lost. Since the water head is not so large and the water level on the upstream side of the fine automatic dust remover 6 does not rise, the removal of fine impurities can be continued.
As a result, the load of contaminants on each automatic dust remover is dispersed, and the increase in the screen blocking rate is suppressed, and fine contaminants can be removed. Moreover, it is possible to continuously remove contaminants without affecting the upstream backwater and without lowering the drainage function of the pumping station or the treatment plant.
Under water removed until a fine contaminants is introduced into the sewage-rainwater in the pump well 8 through the wastewater-rainwater water guide sewer 7 is drained by sewage, rainwater pump 9 from here. In this case, the water can be drained by driving one (or about two) sewage / rainwater pump 9.
The lower water flowing into the sewage treatment ponds 4, after the contaminants have been removed in the sewage automatic dust remover 12, is guided to the downstream side of the sewage pump well 14, drainage from here to the outside by sewage pumps 13 Will come to be.

In addition, when there is a large amount of sewage flowing into the sewage treatment plant via the inflow channel 1 such as during precipitation, when it cannot be treated in one sewage / rainwater treatment pond 21, as shown in FIG. sewage, stormwater treatment ponds 22, ..., the sewage, rainwater阻水door 10 of 26 to open.
In the case shown in FIG. 2, the sewage / rainwater blocking door 10 of all sewage / rainwater treatment ponds 21, 22,.

In this case, in order to protect the combined sewage treatment system and prevent the drainage function from being deteriorated, the sewage that has flowed in via the inflow water channel 1 is all sewage / rainwater treatment ponds 21, 22,. guided to 26, after removal of the contaminants is performed in the wastewater, stormwater Ikeuchi, all sewage is led to wastewater-rainwater in the pump well 8 through the wastewater-rainwater water guide sewer 7, from here, Although all the sewage and rainwater pumps 9 are drained, fine impurities are not removed.
The lower water flowing into the sewage treatment ponds 4, as in the case water flow is small, after the contaminants have been removed in the sewage automatic dust remover 12, is guided to the downstream side of the sewage pump well 14, where The wastewater pump 13 drains the water to the outside.

  As described above, the combined sewage treatment system of the present invention has been described based on the embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and the configurations thereof are appropriately set within the scope not departing from the gist thereof. It can be changed.

The combined sewage treatment system according to the present invention is capable of finely adjusting the amount of sewage that flows into the sewage treatment plant without increasing the head loss due to the automatic dust remover installed in the sewage / rainwater treatment pond. Since it has the characteristic of removing impurities, it can be suitably used for combined sewage treatment applications, and can also be used, for example, for combined sewage sedimentation basins.

It is a top view which shows one Example of the combined sewage treatment system of this invention. It is a top view at the time of making it flow into all the treatment ponds arranged side by side of the same sewage treatment plant. It is external appearance explanatory drawing of a fine mesh automatic dust remover.

DESCRIPTION OF SYMBOLS 1 Inflow waterway 21, 22, ..., 26 Sewage and rainwater treatment pond 3 Branch waterway 4 Sewage treatment pond 5 Fine automatic dust remover 5 'Fine automatic dust remover 6 Fine automatic dust remover 7 Sewage / rain water guide 8 Waste water / Rainwater pump well 9 Sewage / rainwater pump 10 Sewage / rainwater blocking door 11 Sewage blocking door 12 Sewage automatic dust remover 13 Sewage pump 14 Sewage pump well 15 Contact gate S Screen

Claims (5)

Branched than the inflow sewage-stormwater pond installed an automatic dust remover waterways plurality juxtaposed, in the merging type sewage treatment system adapted to process sewage and rainwater flows, among the plurality of wastewater, stormwater ponds particulars automatic minutia automatic dust remover on the upstream side of the at least one sewage-stormwater Ikeuchi, placed at a predetermined interval fine eyes automatic dust remover downstream thereof, the downstream side of the other wastewater-stormwater Ikeuchi A combined sewage treatment system characterized by installing only a dust remover .   2. The combined sewage treatment system according to claim 1, wherein the fine dust automatic dust remover captures contaminants in the water by a circulating screen and collects the captured contaminants in a discharge chute on the water. . The screen cell width of particulars automatic dust removal machine and the fine eye automatic dust removal machine and the installation was sewage, stormwater treatment pond of details automatic dust removal machine 12~18mm, of particulars automatic dust removal machine, which was installed in the other sewage, stormwater treatment ponds screen The combined sewage treatment system according to claim 1 or 2, wherein the mesh width is set to 22 to 28 mm. The wastewater-rainwater阻水door which to perform the Rohm wastewater-stormwater pond claim 1, 2 or 3 merging formulas described is characterized in that disposed in the inlet portion of the sewage-stormwater ponds Sewage treatment system. Sewage and rainwater treatment ponds equipped with fine automatic dust removers and fine automatic dust removers sequentially pass water to other sewage and rainwater treatment ponds equipped with only fine automatic dust removers in response to an increase in the amount of inflow water. 5. The combined sewage treatment system according to claim 4 , wherein the sewage / rainwater blocking door is disposed at the entrance of each sewage / rainwater treatment pond.

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