JP5171678B2 - Water treatment equipment - Google Patents

Description

  The present invention relates to a water treatment technique, and more particularly, to a construction technique of a water treatment apparatus that houses a purification treatment unit that performs purification treatment of water to be treated in a treatment tank body.

Conventionally, various techniques for treating treated water such as domestic wastewater discharged from ordinary households and sewage such as industrial wastewater have been proposed. For example, Patent Document 1 below discloses a sewage treatment apparatus having a configuration including an aerobic biological treatment tank, a floating filtration tank, and a solid-liquid separation tank as a mechanism for treating the water to be treated.
By the way, in this type of water treatment apparatus having an aerobic treatment area such as an aerobic biological treatment tank, in order to ensure the desired treatment performance of the aerobic treatment area, Hydrological residence time of the treated water (also referred to as “HRT”) is an important design factor. Specifically, in order to promote the nitrification reaction of treated water (nitrification (oxidation) of ammonia in the treated water) in the aerobic treatment region, it is necessary to relatively increase the flow rate of the treated water. Moreover, in order to promote the rise of the scum, it is necessary to relatively reduce the amount of water to be treated to increase the residence time of the water to be treated.
However, as in the sewage treatment apparatus described in Patent Document 1 below, an aerobic treatment region is disposed in a flow path in which treated water is continuously treated in each treatment region disposed in series with each other. In a water treatment device, there is a conflict between relatively increasing and decreasing the amount of water to be treated in the aerobic treatment region, so that the nitrification reaction of treated water is promoted and the rise of scum is promoted. It is difficult to achieve both.
Japanese Patent No. 3699706

  Therefore, the present invention has been made in view of such points, and in a water treatment apparatus including an aerobic treatment region for performing aerobic treatment of water to be treated, nitrification reaction promotion of water to be treated in the aerobic treatment region, It is an object of the present invention to provide a technique effective for achieving both promotion of scum levitation promotion from treated water.

  The present invention is configured to solve the above problems. In addition, this invention is used suitably as construction technology of the water treatment apparatus which processes various to-be-processed waters, such as domestic waste water discharged | emitted from a general household etc., kitchen waste_water | drain, industrial wastewater.

  The water treatment apparatus according to the present invention includes at least a purification treatment section, an inflow section, and an outflow section. The purification treatment unit has a function of carrying out purification treatment of water to be treated which is accommodated in the treatment tank body. This purification processing unit is configured by appropriately combining one or a plurality of processing parts. As this purification treatment unit, typically, a treatment for removing contaminants in the treated water, an anaerobic treatment of the treated water, an aerobic treatment of the treated water, a solid-liquid separation treatment of the treated water, and a disinfection of the treated water A first purification processing unit that sequentially performs processing; an anaerobic treatment of water to be treated; an aerobic treatment of water to be treated; a solid-liquid separation process of water to be treated; Part can be adopted. An inflow part is comprised as a site | part from which raw | natural water flows in into a purification process part from the tank outside a processing tank main body. An outflow part is comprised as a site | part from which the water after the purification process in a purification process part flows out of the tank of a processing tank main body.

Particularly in the present invention, the purification processing section further includes a flow path, a sludge separation area, an aerobic treatment area, a transfer mechanism, and a return mechanism.
The distribution path is configured as a path in which the raw water flowing in from the inflow part continuously flows to the outflow part while being purified.
The sludge separation region is configured as a region where sludge in the water to be treated is subjected to solid-liquid separation treatment in the distribution channel. The sludge separation area here includes various areas where the sludge in the treated water is subjected to solid-liquid separation treatment, and typically includes a contaminant removal tank or an anaerobic filter bed for removing the contaminants in the treated water. The anaerobic filter floor tank provided corresponds to the region.
The aerobic treatment region of the water to be treated is arranged so as to be branched from the distribution path, and is configured as a region where the organic pollutant in the water to be treated is aerobically treated. Typically, depending on the carrier flow filtration tank liquidity acceptable carrier is filled, the area is configured.

The transfer mechanism is configured as a mechanism for branching a part of the sewage after the solid-liquid separation process of the sludge in the sludge separation region from the flow path to the aerobic treatment region. The “sewage after the sludge solid-liquid separation treatment” as referred to herein is a main idea widely including water obtained by fixed separation treatment of water containing sludge, and the solid contained in the sewage, There is no limitation on the degree of solids remaining in the sewage. The transfer mechanism, the water flows from the distribution channel into the aerobic treatment region, i.e. may be permitted to solid-liquid separation operation transportation of sewage after the wastewater by pumping by a transfer pump such as d A lift pump and water pump It is configured using a transport mechanism.

  The return mechanism is configured as a path for returning the water after the aerobic treatment in the aerobic treatment area to the distribution path. The return mechanism only needs to allow water to be transferred from the aerobic treatment area to the distribution path, and is typically extruded through a return flow path formed by interior materials such as a tank wall and a partition plate of the treatment tank body. It is configured using a mechanism for returning water by the principle of flow or overflow, and a mechanism for transferring water by pump transfer by a transfer pump such as an air lift pump or a submersible pump. This return mechanism can be connected to various treatment areas provided on the flow path where the raw water flowing in from the inflow part continuously flows to the outflow part while being purified, and is typically connected to the sludge separation area. Is done.

As a result, the amount of water to be treated flowing in the aerobic treatment region can be set independently of the amount of water to be treated flowing in the distribution path. Here, “independently set” means that the sewage transferred from the distribution path to the aerobic treatment area is disposed at a position outside the distribution path that is the main flow. The amount of transferred water, that is, the amount of treated water flowing into the aerobic treatment region (the amount of treated water in the aerobic treatment region) can be adjusted only by the transfer pump regardless of (without depending on) the amount of water in the flow path. The main point. On the other hand, when the aerobic treatment area is disposed on the distribution path, the amount of water to be treated flowing through the aerobic treatment area depends on the amount of water in the distribution path and is difficult to set independently.

  According to such a configuration of the water treatment apparatus according to the present invention, since the residence time of the water to be treated in the aerobic treatment region can be adjusted independently, for example, the nitrification reaction of the water to be treated is performed. In order to promote, the flow rate of treated water in the aerobic treatment region is relatively increased, or the flow rate of treated water in the aerobic treatment region is relatively reduced to promote the rise of scum. It becomes possible to lengthen the residence time. Therefore, it is possible to achieve both the nitrification reaction promotion of the water to be treated in the aerobic treatment region and the promotion of scum levitation from the water to be treated. As used herein, “scum” typically includes a sponge-like thick film-like float that is formed on the water surface by suspending suspended matter, fibers, oil lipids, and bacteria in raw water.

  Further, it is known that sewage containing a large amount of sludge and having a high BOD load is unlikely to undergo a nitrification reaction (nitrification (oxidation) of ammonia in the water to be treated). Since the sewage after the liquid separation treatment is transferred to the aerobic treatment area and nitrification is performed, the sewage with a low BOD load in which a certain solid content is separated by solid-liquid separation is nitrified. Thus, it is advantageous with respect to the progress of the nitrification reaction. Therefore, according to the present invention, in terms of facilitating the nitrification reaction of the water to be treated, it is obtained in the case where sludge excess sludge that has not been subjected to solid-liquid separation treatment of sludge is treated in the aerobic treatment region. The effect which cannot be performed will be produced.

Moreover, in the further form of the water treatment apparatus concerning this invention, the said purification process part is a contaminant removal area | region where the removal process of the contaminant in a to-be-processed water is made, and a contaminant removal process in a contaminant removal area | region. And an anaerobic treatment region for subjecting the sludge in the water to be treated to solid-liquid separation while anaerobically treating the water after the treatment is performed, and the sludge separation region is preferably constituted by the contaminant removal region. Further, in this configuration, the transfer mechanism is configured to transfer a part of the sewage after the sludge solid-liquid separation process is performed in the contaminant removal area to the aerobic treatment area, and the return mechanism is the aerobic treatment area. It is set as the structure which returns the water after an aerobic process in (1) to a contaminant removal area | region.
According to such a configuration, the amount of water to be treated flowing from the contaminant removal region to the aerobic treatment region can be set independently of the amount of water to be treated flowing through the distribution path.

Moreover, in the further form of the water treatment apparatus concerning this invention, the said purification process part is a contaminant removal area | region where the removal process of the contaminant in a to-be-processed water is made, and a contaminant removal process in a contaminant removal area | region. And an anaerobic treatment region for subjecting the sludge in the water to be treated to solid-liquid separation while anaerobically treating the water after the treatment is performed, and the sludge separation region is preferably constituted by the anaerobic treatment region. Further, in this configuration, the transfer mechanism is configured to transfer a part of the sewage after solid-liquid separation processing of sludge in the anaerobic treatment region to the aerobic treatment region, and the return mechanism is configured to move to the aerobic treatment region. The water after aerobic treatment is returned to the contaminant removal area.
According to such a configuration, the amount of water to be treated flowing from the anaerobic treatment region to the aerobic treatment region can be set independently of the amount of water to be treated flowing through the distribution channel.

Moreover, in the further form of the water treatment apparatus concerning this invention, the said purification process part is the 2nd aerobic treatment area | region which performs aerobic treatment of to-be-processed water downstream of the said anaerobic treatment area | region among distribution channels. A structure sequentially including a solid-liquid separation processing region for performing solid-liquid separation processing of water processed in the second aerobic processing region, and a disinfection processing region for performing disinfection processing of water processed in the solid-liquid separation processing region Is preferred.
According to such a configuration, the water after being aerobically treated in the aerobic treatment region and returned to the distribution channel is further downstream in the anaerobic treatment region, the aerobic treatment region, the solid-liquid separation treatment region, and the disinfection. It is sequentially processed in the processing area.

  Further, in a further embodiment of the water treatment apparatus according to the present invention, the water treatment apparatus includes a measuring mechanism for measuring the thickness of the levitation scum in the sludge separation area, and the transfer mechanism is a sludge solid-liquid separation process in the sludge separation area. The amount of water transferred by the transfer pump is adjusted based on the transfer pump that transfers a part of the sewage after being discharged to the aerobic treatment area by pump transfer and the thickness of the floating scum in the sludge separation area measured by the measurement mechanism The adjustment mechanism is preferably configured, and the adjustment mechanism is preferably configured to switch between the first adjustment mode and the second adjustment mode. The first adjustment mode is a transfer mode in which the amount of water transferred by the transfer pump is relatively reduced when the thickness of the floating scum in the sludge separation region is smaller than a specified value. On the other hand, the first adjustment mode is a transfer mode in which the amount of water transferred by the transfer pump is relatively increased when the thickness of the levitation scum in the sludge separation region is larger than a specified value. According to such a configuration, by performing the first adjustment mode and the second adjustment mode, both the nitrification reaction promotion of the water to be treated in the aerobic treatment region and the promotion of scum levitation from the water to be treated are achieved. It becomes possible to plan.

  As described above, according to the present invention, in the water treatment apparatus including the aerobic treatment region for performing the aerobic treatment of the water to be treated, the raw water flowing in from the inflow part is continuously purified and subjected to the outflow part. An aerobic treatment region is provided by branching from the flowing distribution route, and a part of the sewage after solid-liquid separation treatment of sludge is performed in the sludge separation region of the distribution route in the aerobic treatment region. After that, by adopting a configuration of returning to the distribution path again, the amount of sewage transferred from the sludge separation area to the aerobic treatment area, that is, the residence time of the water to be treated in the aerobic treatment area can be independently determined. Therefore, it is possible to achieve both the nitrification reaction promotion of the water to be treated in the aerobic treatment region and the promotion of scum floating from the water to be treated.

  Below, the structure of the water treatment apparatus of one Embodiment in this invention is demonstrated based on drawing. In addition, this Embodiment demonstrates the water treatment apparatus which processes the waste_water | drain (sewage) discharged | emitted from a general household etc. FIG.

  FIG. 1 is referred to regarding a schematic configuration of a water treatment apparatus 100 which is an embodiment of a “water treatment apparatus” in the present invention. As shown in FIG. 1, the water treatment apparatus 100 of the present embodiment accommodates various purification treatment mechanisms inside a tank body 101 formed in a tank shape. The purification processing mechanism includes a primary processing unit 102 and a secondary processing unit 103 from the upstream (left side in FIG. 1) corresponding to the order of the processing steps. The raw water that has flowed into the tank main body 101 from the outside through the inflow portion 101a is processed in the primary processing unit 102, then processed in the secondary processing unit 103, and then discharged to the outside of the tank main body 101 through the outflow portion 101b. . The primary processing unit 102 includes a contaminant removal tank 110, an aerobic treatment tank 120, and an anaerobic filter bed tank 130. On the other hand, the secondary processing unit 103 includes an aerobic processing tank 140, a solid-liquid separation processing tank 150, and a disinfection tank 160. The tank body 101 here corresponds to the “processing tank body” in the present invention, and the “purification processing section” in the present invention is configured by the primary processing unit 102 and the secondary processing unit 103 accommodated in the tank body 101. The

  In this embodiment, the contaminant removal tank 110 is arranged at the most upstream part in the tank body 101, and the raw water flows into the contaminant removal tank 110 through the inflow part 101a. The flow of this raw water to the contaminant removal tank 110 is shown by the arrow 10 in FIG. The inflow portion 101a referred to here corresponds to an “inflow portion” in the present invention. The contaminant removal tank 110 is a tank that performs a process of separating contaminants contained in the treated water from the treated water using solid-liquid separation means such as an inflow baffle (not shown). Performs solid-liquid separation function. A part of the water after being treated in the contaminant removal tank 110 is transferred to the aerobic treatment tank 120, and the rest is transferred to the anaerobic filter bed tank 130 disposed downstream thereof. This water flow to the anaerobic filter bed 130 is indicated by the arrow 40 in FIG.

  The aerobic treatment tank 120 stays in the water generated by the solid-liquid separation process in the contaminant removal tank 110, that is, the sewage after the solid-liquid separation process of sludge, specifically, the intermediate water level of the contaminant removal tank 110. It functions to receive and treat water (also called “intermediate water” or “supernatant liquid”). More specifically, a first treatment for aerobic treatment (also referred to as “nitrification” or “oxidation” of ammonia in water to be treated) of organic pollutants contained in the intermediate water received from the contaminant removal tank 110; The aerobic treatment tank 120 performs a second process for facilitating the scum collection of oil and fat and solid matter in the contaminant removal tank 110.

  Regarding the specific configuration of the aerobic treatment tank 120, one or more of an aeration tank, a contact aeration tank, a carrier fluidized tank, etc. can be used as appropriate, and in particular, clogging of solids such as sludge. It is preferable to use a carrier fluidized tank that has a low risk. Typically, the aerobic treatment tank 120 is disposed on the upstream side of the contaminant removal tank 110, and the intermediate water in the contaminant removal tank 110 is aerobic treatment tank by a transfer pump 112 such as an air lift pump. It is configured to be pumped to 120. The flow of this water from the contaminant removal tank 110 to the aerobic treatment tank 120 is shown by the arrow 20 in FIG. The transfer pump 112 and the adjusting mechanism 114 described later constitute the “transfer mechanism” in the present invention. This transfer mechanism only needs to allow the transfer of sewage from the contaminant removal tank 110 to the aerobic treatment tank 120, and is pushed out through a transfer channel formed by interior materials such as a tank wall and a partition plate of the treatment tank body. It may be configured as a mechanism for advancing sewage by the principle of flow or overflow.

  Further, the water after the aerobic treatment in the aerobic treatment tank 120 is configured to be returned from the aerobic treatment tank 120 to the contaminant removal tank 110 in accordance with, for example, the extrusion flow or overflow principle. Yes. This flow of water from the aerobic treatment tank 120 to the contaminant removal tank 110 is indicated by an arrow 30 in FIG. Accordingly, a water circulation flow (also referred to as “reflux”) is formed between the contaminant removal tank 110 and the aerobic treatment tank 120. Specifically, a partition plate for partitioning both regions is disposed between the aerobic treatment tank 120 and the contaminant removal tank 110, and the water level difference between the aerobic treatment tank 120 and the contaminant removal tank 110. Therefore, a return mechanism is adopted in which water is returned from the aerobic treatment tank 120 to the contaminant removal tank 110 beyond the advection opening formed in the upper part of the partition plate. The return mechanism here corresponds to the “return mechanism” in the present invention. This return mechanism only needs to permit water transfer from the aerobic treatment tank 120 to the contaminant removal tank 110, and may be constituted by a transfer pump such as an air lift pump or a submersible pump.

  Moreover, in this Embodiment, the adjustment mechanism 114 which can adjust the amount of water transferred by the transfer pump 112 is provided. Typically, regarding an air lift pump as an example of the transfer pump 112, the adjustment mechanism 114 is configured by an adjustment valve or the like that can automatically or manually adjust the amount of air supplied to the air lift pump. The amount of water transferred by the transfer pump 112 is appropriately adjusted by the adjusting mechanism 114. In the operation in which the transfer by the transfer pump 112 is continuously performed, the adjustment valve is opened and the valve opening is appropriately adjusted. In the operation in which the transfer by the transfer pump 112 is performed intermittently, the adjustment of the electromagnetic valve or the like is performed. It is preferable that the valve is controlled to be switched between an open state and a closed state. The transfer pump 112 and the adjustment mechanism 114 here correspond to the “transfer pump” and the “adjustment mechanism” in the present invention, respectively.

  The anaerobic filter bed tank 130 is a treatment tank having a function of solid-liquid separation treatment of sludge in the treated water while anaerobically treating (reducing) the organic pollutants in the treated water received from the contaminant removal tank 110. Specifically, the filter bed is filled with a predetermined amount of filter medium to which anaerobic microorganisms for anaerobic treatment (reduction) of organic pollutants are attached. This anaerobic treatment can reduce BOD and reduce sludge. The water after being treated in the anaerobic filter bed tank 130 is transferred to the contact filter bed tank 140 arranged downstream thereof. This water flow into the contact filter bed 140 is indicated by the arrow 50 in FIG. The anaerobic filter bed tank 130 may have a one-chamber structure in which the treated water flows as an upward flow or a downward flow, or a chamber in which the treated water flows as an upward flow and the treated water A two-chamber structure combining a chamber flowing as a downward flow may be used.

  The aerobic treatment tank 140 has a function of performing aerobic treatment of water to be treated, and is configured as a treatment tank provided separately from the aerobic treatment tank 120. The aerobic treatment tank 140 is typically a carrier fluid tank in which a carrier to which a biofilm of aerobic microorganisms adheres is flowably filled, or a contact aeration tank in which contact aeration is performed. An air diffuser for supplying air for aerobic treatment is disposed at the bottom. When air is supplied from the air diffuser, the organic pollutants in the water to be treated are subjected to aerobic treatment (oxidation). The water that has been treated in the aerobic treatment tank 140 is transferred to a solid-liquid separation treatment tank 150 disposed downstream thereof. This water flow to the solid-liquid separation treatment tank 150 is indicated by an arrow 60 in FIG. The aerobic treatment tank 140 here corresponds to the “second aerobic treatment region” in the present invention.

  The solid-liquid separation treatment tank 150 is configured as a treatment tank having a function of performing solid-liquid separation treatment of the water treated in the aerobic treatment tank 140. The solid-liquid separation processing tank 150 is typically a processing tank that performs solid-liquid separation processing by filtration using a filler such as a carrier, a filter medium, or a filter, or a processing tank that performs solid-liquid separation processing by sedimentation separation. Thereby, SS (floating matter) in the for-treatment water is separated. The water that has been treated in the solid-liquid separation treatment tank 150 is transferred to a disinfection tank 160 disposed downstream thereof. This water flow into the disinfection tank 160 is indicated by the arrow 70 in FIG. The solid-liquid separation processing tank 150 here corresponds to the “solid-liquid separation processing region” in the present invention.

  The disinfection tank 160 is a treatment tank having a function of disinfecting water flowing from the solid-liquid separation treatment tank 150, and is disposed at the most downstream portion in the tank body 101 in the present embodiment. The disinfecting tank 160 includes a drug cylinder filled with a solid chlorine agent (disinfectant) for performing a disinfecting process at the most upstream part. In this disinfection tank 160, the water after the disinfection process (chlorine disinfection process) by the solid chlorine agent eluted from the medicine cylinder is discharged to the outside of the tank body 101 through the outflow part 101b. This water flow is indicated by the arrow 80 in FIG. The disinfection tank 160 here corresponds to the “disinfection treatment region” in the present invention, and the outflow portion 101b here corresponds to the “outflow portion” in the present invention.

  By the way, in a water treatment apparatus having an aerobic treatment region such as the aerobic treatment tank 120, in order to ensure the desired treatment performance of the aerobic treatment region, the amount of water to be treated and the amount of treated water The hydraulic retention time (also referred to as “HRT”) is an important design factor. Specifically, in order to promote the nitrification reaction (oxidation) of the water to be treated in the aerobic treatment region, it is necessary to relatively increase the amount of water to be treated, and to promote the rise of scum. Therefore, it is necessary to relatively reduce the amount of water to be treated in order to increase the residence time of the water to be treated. However, in a water treatment apparatus in which treated water is continuously treated in each treatment area arranged in series with each other, the flow rate of treated water in the aerobic treatment area is relatively increased. It is difficult to achieve both accelerating the nitrification reaction of the water to be treated and promoting the rise of scum from the water to be treated. As used herein, “scum” typically includes a sponge-like thick film-like float that is formed on the water surface by suspending suspended matter, fibers, oil lipids, and bacteria in raw water.

  Therefore, in the present embodiment, as described above, the aerobic treatment tank 120 is branched from the contaminant removal tank 110 of the main flow of the primary treatment unit 102 (also the main flow of the secondary treatment unit 103 and the water treatment apparatus 100). It is configured to make it. In other words, in the present embodiment, the primary processing unit 102 performs a contaminant removal tank 110 for removing contaminants in the water to be treated, and after the contaminant removal process is performed in the contaminant removal tank 110. An anaerobic filter bed tank 130 for subjecting the sludge in the water to be treated to solid-liquid separation while anaerobically treating the water, and the contaminant removal tank 110 constitutes a sludge separation region. Then, a part of the sewage (“intermediate water” or “supernatant”) after the sludge separation in the main flow (contaminant removal tank 110) of the primary processing unit 102 passes through the transfer mechanism described above. The water after being branched from the inflow and transferred to the aerobic treatment tank 120, the water after being subjected to the aerobic treatment in the aerobic treatment tank 120 is again returned to the contaminant removal tank 110 through the above-described return mechanism. It is configured to be returned. The main flow referred to here is a distribution path in which the raw water flowing in from the inflow section 101a flows continuously to the outflow section 101b while being purified, and this main flow corresponds to the “distribution path” in the present invention. Further, the contaminant removal tank 110 and the aerobic treatment tank 120 here correspond to the “sludge separation region” and the “aerobic treatment region” in the present invention, respectively.

  In such a configuration, the aerobic treatment tank 120 is arranged at a position branched from the flow path that is the main flow and deviated from the flow path, and from the contaminant removal tank 110 to the aerobic treatment tank 120. The flow path of the sewage transferred (and hence the amount of water to be treated flowing in the aerobic treatment tank 120 (the amount of treated water in the aerobic treatment tank 120)) flowing continuously from the inflow part 101a to the outflow part 101b It can be set independently for the amount of water transferred. That is, the amount of water to be treated flowing through the aerobic treatment tank 120 can be adjusted regardless of the amount of water in the distribution channel that is the main flow (without depending on the amount of water in the distribution channel). On the other hand, when the aerobic treatment tank 120 is disposed on the distribution path, the amount of water to be treated flowing in the aerobic treatment tank 120 depends on the amount of water in the distribution path and is set independently. difficult. Thereby, the residence time of the to-be-treated water in the aerobic treatment tank 120 can be set independently. According to such a configuration, since the residence time of the water to be treated in the aerobic treatment tank 120 can be adjusted independently, the aerobic treatment is performed to promote the nitrification reaction of the water to be treated, for example. In order to relatively increase the amount of water to be treated in the tank 120 and to promote the rise of scum, the amount of water to be treated in the aerobic treatment tank 120 is relatively decreased to increase the residence time of the treated water. It becomes possible.

  Here, the specific adjustment mode which sets independently the flow volume of to-be-processed water in the aerobic treatment tank 120 of the said structure is demonstrated. As described above, the aerobic treatment tank 120 includes a scum levitation mode and a nitrification mode in which the amount of water to be treated can be set independently. If necessary, in addition to these scum levitation mode and nitrification mode, a further adjustment mode can be set.

  In the scum levitation mode, the amount of water transferred from the contaminant removal tank 110 to the aerobic treatment tank 120 is adjusted to the amount of water transferred giving priority to the hydraulic residence time required to promote scum levitation. Specifically, when the retention amount of the floating scum in the contaminant removal tank 110 is less than a specified amount, the adjustment mechanism 114 performs adjustment to relatively reduce the amount of water transferred by the transfer pump 112. Thereby, the hydraulic residence time of the to-be-processed water circulated between the contaminant removal tank 110 and the aerobic treatment tank 120 becomes long, and the scum easily floats in the contaminant removal tank 110. The scum levitation mode here corresponds to the “first adjustment mode” in the present invention.

  On the other hand, in the nitrification mode, the amount of water transferred from the contaminant removal tank 110 to the aerobic treatment tank 120 is adjusted with emphasis on nitrification of the water to be treated. Specifically, when the retention amount of the floating scum in the contaminant removal tank 110 is larger than a specified amount, the adjustment mechanism 114 performs adjustment to relatively increase the amount of water transferred by the transfer pump 112. Thereby, the amount of circulating water circulated between the contaminant removal tank 110 and the aerobic treatment tank 120 is increased, nitrification of the water to be treated in the aerobic treatment tank 120 is promoted, and as a result, the amount of nitrification increases. Become. The nitrification mode here corresponds to the “second adjustment mode” in the present invention.

  In addition, regarding the adjustment of the transfer water amount in the scum levitation mode and the nitrification mode, the load of the transfer pump 112 is adjusted by the adjustment mechanism 114. In this case, the load of the transfer pump 112 may simply be adjusted, or the information on the actual transfer water amount is detected by feedback control, and the transfer pump 112 is adjusted so that the actual transfer water amount matches the desired transfer water amount. The load may be adjusted. Further, regarding the determination that the retention amount of the floating scum in the contaminant removal tank 110 is less than or greater than the regulation, the scum thickness of the floating scum actually generated in the contaminant removal tank 110 is detected. Is preferred. Based on the detection result, the adjustment mechanism 114 of the transfer pump 112 is adjusted manually or automatically, and the scum levitation mode or the nitrification mode is performed. When this detection is performed by a simple method, the scum thickness of the levitation scum can be measured by the operator using a scale provided in the tank or a separately prepared scale.

  As described above, according to the present embodiment, the contaminant removal tank 110, the anaerobic filter bed tank 130, the aerobic treatment tank 140, the solid-liquid separation treatment tank 150, and the disinfection tank 160 deviate from the main flow path. By disposing the aerobic treatment tank 120, it is possible to independently set the flow amount of the water to be treated in the aerobic treatment tank 120 with respect to the flow amount of the main flow path. In this configuration, in particular, by performing the scum levitation mode and the nitrification mode, it is possible to achieve both the nitrification reaction promotion of the water to be treated in the aerobic treatment tank 120 and the promotion of scum levitation from the water to be treated.

  Moreover, according to this Embodiment, the structure which transfers the sewage after the solid-liquid separation process of sludge is made to the aerobic treatment tank 120, and performs nitrification (nitrification (oxidation) of ammonia in to-be-processed water) Therefore, sewage with a low BOD load from which a certain amount of solid content has been separated by solid-liquid separation is nitrified, which is advantageous for the progress of the nitrification reaction. In contrast, it is known that sewage containing a large amount of sludge and having a high BOD load is unlikely to undergo a nitrification reaction. Therefore, according to the present embodiment, in terms of facilitating the nitrification reaction of the water to be treated, when sludge excess sewage in which sludge is not subjected to solid-liquid separation is treated in the aerobic treatment region. In this way, there will be effects that cannot be obtained.

  In addition, according to the present embodiment, since the aerobic treatment tank 120 treats part of the water to be treated flowing in the contaminant removal tank 110, the anaerobic filter bed tank 130 downstream of the contaminant removal tank 110 is used. The water quality load (for example, BOD etc.) of to-be-processed water is suppressed, and the processing performance improvement and the filtration performance improvement by the load reduction to anaerobic are aimed at.

  Further, according to the present embodiment, it is possible to independently set the capacity of the aerobic treatment tank 120 with respect to other treatment tanks by branching the aerobic treatment tank 120 from the main distribution path, For example, by making the aerobic treatment tank 120 compact, the water treatment apparatus 100 as a whole can be made compact.

[Other Embodiments]
In addition, this invention is not limited only to said embodiment, A various application and deformation | transformation can be considered. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the above embodiment, the primary treatment unit 102 is configured by the contaminant removal tank 110, the aerobic treatment tank 120, and the anaerobic filter bed tank 130, and the aerobic treatment tank 140, the solid-liquid separation treatment tank 150, and the disinfection tank 160 are the second. Although the case where the next processing unit 103 is configured has been described, in the present invention, the contaminant removal tank 110 and the raw water flowing in from the inflow unit 101a continuously flow into the outflow unit 101b while being purified. Any structure may be used as long as it has at least a sludge separation region such as an anaerobic filter bed tank 130 and at least an aerobic treatment region such as an aerobic treatment tank 120 in a path branched from the flow path. It is possible to appropriately select the number and type of each processing tank constituting the secondary processing unit 103.

  For example, the primary processing unit 102 and the secondary processing unit 103 remove impurities in the water to be treated, anaerobic treatment of the water to be treated, aerobic treatment of the water to be treated, solid-liquid separation treatment of the water to be treated, A configuration in which treated water is sterilized sequentially, an anaerobic treatment of treated water, an aerobic treatment of treated water, a solid-liquid separation process of treated water, and a sterilized treatment of treated water are adopted sequentially. be able to.

  Moreover, although the aerobic treatment tank 120 described the case where the aerobic treatment tank 120 receives and processes the sewage from the contaminant removal tank 110, and returns to the contaminant removal tank 110 after that, it was described. Regarding the water receiving source and the treated water transfer destination, an area other than the contaminant removal tank 110 can be appropriately selected as necessary. Reference is made to FIGS. 2 and 3 for this modification. 2 and 3, the same elements as those shown in FIG. 1 are denoted by the same reference numerals, and the description of the same components is omitted.

  FIG. 2 shows a schematic configuration of the primary processing unit 202 of another embodiment. In the primary processing unit 202 shown in FIG. 2, the sludge is subjected to solid-liquid separation processing in the anaerobic filter bed tank 130, and the sludge after the sludge solid-liquid separation processing is received in the aerobic treatment tank 120 and processed. The treated water is transferred to the contaminant removal tank 110. That is, the primary treatment unit 202 anaerobically treats the contaminant removal tank 110 that is subjected to the removal process of contaminants in the water to be treated, and the water after the contaminant removal process is performed in the contaminant removal tank 110. An anaerobic filter bed tank 130 for solid-liquid separation treatment of sludge in the water to be treated is provided, and the anaerobic filter bed tank 130 constitutes a sludge separation region. And a part of the sewage after the solid-liquid separation process of the sludge was made in the anaerobic filter bed tank 130 is transferred to the aerobic treatment tank 120 by the transfer mechanism, and after the aerobic treatment in the aerobic treatment tank 120 The water is returned to the contaminant removal tank 110 by the return mechanism. The contaminant removal tank 110 here corresponds to the “contamination removal area” in the present invention, and the anaerobic filter bed tank 130 here corresponds to the “sludge separation area” and the “anaerobic treatment area” in the present invention. To do.

  FIG. 3 shows a schematic configuration of the secondary processing unit 302 according to another embodiment. In this primary processing unit 302 shown in FIG. 3, the aerobic treatment tank 120 receives the water in which the sludge is subjected to the solid-liquid separation process in the anaerobic filter bed tank 130, that is, the sludge after the sludge is subjected to the solid-liquid separation process. It is set as the structure which processes and returns the water after a process to the anaerobic filter bed tank 130 again. That is, the primary processing unit 302 performs anaerobic treatment on the contaminant removal tank 110 in which the contaminants in the water to be treated are removed, and the water after the contaminant removal treatment is performed in the contaminant removal tank 110. An anaerobic filter bed tank 130 for solid-liquid separation treatment of sludge in the water to be treated is provided, and the anaerobic filter bed tank 130 constitutes a sludge separation region. And a part of the sewage after the solid-liquid separation process of the sludge was made in the anaerobic filter bed tank 130 is transferred to the aerobic treatment tank 120 by the transfer mechanism, and after the aerobic treatment in the aerobic treatment tank 120 The water is returned again to the anaerobic filter bed tank 130 by the return mechanism.

  2 and FIG. 3, the flow rate of the water to be treated in the aerobic treatment tank 120 is independent of the flow rate of the main flow path as in the primary processing unit 102 shown in FIG. Therefore, it is possible to achieve both the enhancement of the nitrification reaction of the water to be treated in the aerobic treatment tank 120 and the promotion of scum levitation from the water to be treated. In addition, by transferring the sewage after the sludge solid-liquid separation treatment to the aerobic treatment tank 120 and nitrifying, the sewage with a low BOD load is nitrified, and the progress of the nitrification reaction It is advantageous.

  Moreover, in the said embodiment, although the household water treatment apparatus was described, this invention applies not only to a household water treatment apparatus but to various water treatment apparatuses installed in a factory etc. similarly. Applicable technology.

It is a figure which shows schematic structure of the water treatment apparatus 100 which is one Embodiment of the "water treatment apparatus" in this invention. It is a figure which shows schematic structure of the primary processing part 202 of another embodiment. It is a figure which shows schematic structure of the primary processing part 302 of another embodiment.

DESCRIPTION OF SYMBOLS 100 ... Water treatment apparatus 101 ... Tank main body 101a ... Inflow part 101b ... Outflow part 102 ... Primary processing part 103 ... Secondary processing part 110 ... Contaminant removal tank 112 ... Transfer pump 114 ... Adjustment mechanism 120 ... Aerobic processing tank 130 ... Anaerobic filter bed tank 140 ... Aerobic tank 150 ... Solid-liquid separation tank 160 ... Disinfection tank

Claims (5)

A purification treatment unit that performs purification treatment of water to be treated contained in the treatment tank main body, an inflow part where raw water flows into the purification treatment part from outside the tank of the treatment tank main body, and after purification treatment in the purification treatment part An outflow part from which the water flows out of the tank of the treatment tank body,
A water treatment device comprising:
The purification treatment unit includes a flow path that continuously flows to the outflow part while the raw water flowing in from the inflow part is purified, and a sludge separation region in which sludge in the water to be treated is subjected to solid-liquid separation treatment in the flow path. And an aerobic treatment area of the water to be treated that is branched from the distribution path, and a part of the sewage after the solid-liquid separation treatment of the sludge is performed in the sludge separation area. A transfer mechanism having a transfer pump for transferring to the aerobic treatment region, and a return mechanism for returning water after aerobic treatment in the aerobic treatment region to the flow path,
The aerobic treatment region is configured as a carrier flow region where the carrier flows,
The amount of water to be treated flowing into the aerobic treatment region is configured independently of the amount of water to be treated flowing through the flow path, and can be set only by the transfer pump .
The purification treatment unit anaerobically treats the contaminant removal region in which the contaminants in the treated water are removed in the distribution channel and the water after the contaminant removal treatment is performed in the contaminant removal region. An anaerobic treatment region for solid-liquid separation treatment of sludge in the water to be treated, and the sludge separation region is constituted by the contaminant removal region,
The transfer mechanism is configured to transfer a part of sewage after solid-liquid separation processing of sludge in the contaminant removal region to the aerobic treatment region,
The water return apparatus, wherein the return mechanism is configured to return water after aerobic treatment in the aerobic treatment region to the contaminant removal region. A purification treatment unit that performs purification treatment of water to be treated contained in the treatment tank main body, an inflow part where raw water flows into the purification treatment part from outside the tank of the treatment tank main body, and after purification treatment in the purification treatment part An outflow part from which the water flows out of the tank of the treatment tank body,
A water treatment device comprising:
The purification treatment unit includes a flow path that continuously flows to the outflow part while the raw water flowing in from the inflow part is purified, and a sludge separation region in which sludge in the water to be treated is subjected to solid-liquid separation treatment in the flow path. And an aerobic treatment area of the water to be treated that is branched from the distribution path, and a part of the sewage after the solid-liquid separation treatment of the sludge is performed in the sludge separation area. A transfer mechanism having a transfer pump for transferring to the aerobic treatment region, and a return mechanism for returning water after aerobic treatment in the aerobic treatment region to the flow path,
The aerobic treatment region is configured as a carrier flow region where the carrier flows,
The amount of water to be treated flowing into the aerobic treatment region is configured independently of the amount of water to be treated flowing through the flow path, and can be set only by the transfer pump .
The purification treatment unit anaerobically treats the contaminant removal region in which the contaminants in the treated water are removed in the distribution channel and the water after the contaminant removal treatment is performed in the contaminant removal region. An anaerobic treatment region for solid-liquid separation treatment of sludge in the treated water, the sludge separation region is constituted by the anaerobic treatment region,
The transfer mechanism is configured to transfer a portion of sewage after solid-liquid separation processing of sludge is performed in the anaerobic processing region to the aerobic processing region,
The water return apparatus, wherein the return mechanism is configured to return water after aerobic treatment in the aerobic treatment region to the contaminant removal region. The water treatment device according to claim 1 or 2,
The purification treatment unit includes a second aerobic treatment region that performs aerobic treatment of water to be treated and a water treated in the second aerobic treatment region downstream of the anaerobic treatment region in the flow path. A water treatment apparatus comprising: a solid-liquid separation treatment region for performing solid-liquid separation treatment; and a disinfection treatment region for performing disinfection treatment of water treated in the solid-liquid separation treatment region. The water treatment device according to any one of claims 1 to 3,
Comprising a measuring mechanism for measuring the thickness of the levitating scum in the sludge separation region,
The transfer mechanism includes a transfer pump that transfers a part of the sewage after solid-liquid separation processing of sludge in the sludge separation region to the aerobic treatment region by pump transfer, and the sludge measured by the measurement mechanism. An adjustment mechanism capable of adjusting the amount of water transferred by the transfer pump based on the thickness of the floating scum in the separation region,
The adjustment mechanism includes a first adjustment mode for relatively reducing the amount of water transferred by the transfer pump when the thickness of the floating scum in the sludge separation region is less than a specified value, and the floating scum in the sludge separation region. When the thickness of the water is greater than a specified value, the water treatment apparatus is configured to switch between the second adjustment mode for relatively increasing the amount of water transferred by the transfer pump. A purification treatment unit that performs purification treatment of water to be treated contained in the treatment tank main body, an inflow part where raw water flows into the purification treatment part from outside the tank of the treatment tank main body, and after purification treatment in the purification treatment part An outflow part from which the water flows out of the tank of the treatment tank body,
A water treatment device comprising:
The purification treatment unit includes a flow path that continuously flows to the outflow part while the raw water flowing in from the inflow part is purified, and a sludge separation region in which sludge in the water to be treated is subjected to solid-liquid separation treatment in the flow path. And an aerobic treatment area of the water to be treated that is branched from the distribution path, and a part of the sewage after the solid-liquid separation treatment of the sludge is performed in the sludge separation area. A transfer mechanism for transferring to the aerobic treatment region, and a return mechanism for returning the water after aerobic treatment in the aerobic treatment region to the flow path,
The amount of water to be treated flowing in the aerobic treatment region is configured to be set independently without depending on the amount of water to be treated flowing in the distribution path,
Comprising a measuring mechanism for measuring the thickness of the levitating scum in the sludge separation region,
The transfer mechanism includes a transfer pump that transfers a part of the sewage after solid-liquid separation processing of sludge in the sludge separation region to the aerobic treatment region by pump transfer, and the sludge measured by the measurement mechanism. An adjustment mechanism capable of adjusting the amount of water transferred by the transfer pump based on the thickness of the floating scum in the separation region,
The adjustment mechanism includes a first adjustment mode for relatively reducing the amount of water transferred by the transfer pump when the thickness of the floating scum in the sludge separation region is less than a specified value, and the floating scum in the sludge separation region. When the thickness of the water is greater than a specified value, the water treatment apparatus is configured to switch between the second adjustment mode for relatively increasing the amount of water transferred by the transfer pump.

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