JP2004154621A - Water reclaiming apparatus and purification equipment having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an effective technology for simply and efficiently discharging solid contained in a water to be treated, in a water reclaiming apparatus composed for treating an inflow water to be treated and discharging the treated water after the treatment to reclaimed water using points as reclaimed water. <P>SOLUTION: A purification tank 100 has a first treatment mechanism 101 for obtaining a reclaimed water (recycled water) by treating wastewater A having a relatively low pollutant concentration, and a second treatment mechanism 102 for purifying wastewater B having a relatively high pollutant concentration. A sedimentation chamber 120 in the first treatment mechanism 101 is provided with an overflow pipe 122 whose inlet is disposed in a sludge settling part 121. Sludge precipitated in the sludge settling part 121 is transferred together with overflow water constantly generated in the sedimentation chamber 120 to a foreign material filter tank 150 in the second treatment mechanism 102 through the overflow pipe 122. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water treatment device configured to treat inflowing treated water and discharge treated water after treatment as wastewater to a wastewater utilization destination. Related to technology for efficient discharge to
[0002]
[Prior art]
Among the wastewater discharged from homes, etc., wastewater with relatively low pollutant concentration (water to be treated) such as bathroom wastewater, washwater wastewater, and washing wastewater is received and treated, and this treated water is used as toilet water in toilets and the like. A processing technique for reusing as (reused water) is known.
In this processing technique, for example, a processing apparatus having a configuration including an aeration tank and a sedimentation tank is used. First, the wastewater having a low concentration of pollutants is received in the aeration tank to perform aeration, and then the sludge in the treated water is solid-liquid separated in the settling tank. The treated water after the sludge is separated into solid and liquid in the sedimentation tank is subjected to a predetermined disinfection treatment or the like, and then transferred to the wastewater destination as the wastewater. Since bathroom drainage, wash sink drainage, and washing drainage are generated constantly and in large quantities, the amount of inflow wastewater flowing into the equipment in such a treatment device is larger than the amount of wastewater transferred to the destination. More balance. Therefore, for example, a flow control device is arranged downstream of the sedimentation tank, and the water to be treated in the aeration tank or the sedimentation tank in the upstream area of the flow control device is constantly discharged outside the device to maintain the water level.
Specifically, a configuration can be used in which an overflow opening is provided at a predetermined water level of the aeration tank, and the treated water in the aeration tank overflows outside the apparatus through the overflow opening.
By the way, in the processing apparatus as described above, the sludge separated into solid and liquid is deposited on the bottom of the settling tank, and it is necessary to efficiently discharge the deposited sludge outside the apparatus. Such sludge is an unnecessary component when the treated water is used as recycled water (medium water). Conventionally, an air lift or a submersible pump has been used as a means for discharging the accumulated sludge (for example, see Patent Document 1). That is, the sludge water containing the sludge deposited on the bottom of the settling tank is pulled out from the bottom of the tank via an air lift or a submersible pump and discharged out of the apparatus.
[0003]
[Patent Document 1]
JP-A-2002-242238 (paragraph number (0045), FIG. 4)
[0004]
[Problems to be solved by the invention]
However, in a configuration using a pump means such as an air lift or a submersible pump to discharge the sludge water from the settling tank to the outside of the apparatus as in the conventional processing apparatus described above, the discharge of the sludge water is intermittent according to the water level of the settling tank. Will do. Therefore, in the above-mentioned conventional processing apparatus, in addition to the pump means itself, various control equipment such as a water level detection sensor, timers, and solenoid valves are required, and there is a problem that the configuration is complicated. In particular, when an air lift is used as the sludge water discharging means, the sludge deposited on the bottom of the sedimentation tank may not be reliably discharged depending on the setting of the air lift amount, and the air lift is used as an efficient discharging means of the sludge water. There was a limit.
Therefore, the inventor has diligently studied such a processing technique in order to solve such a problem. As a result of the examination, the present inventor provided an overflow pipe having an inlet portion extending to the bottom of the settling tank, and using a configuration in which sludge water containing sludge accumulated at the bottom of the tank was discharged by overflow in the overflow pipe, We succeeded in finding that sludge can be easily and efficiently discharged without using an air lift or a submersible pump. In addition, the overflow pipe newly provided in the sedimentation tank contributes not only to the function of discharging sludge but also to the function of maintaining the water level, which is the original function. It has been found that the dual use has an advantage that the overflow opening can be omitted. The technical idea of the present invention that discharges sludge using such an overflow pipe is applicable not only to discharge of sludge but also to a discharge technique of other solid substances similar to sludge.
According to the present invention, in a water treatment device configured to treat inflowing treated water and discharge treated water as treated water to a treated water destination, the solid matter contained in the treated water is discharged simply and efficiently. It is an object to provide a technology effective for performing the above.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the water treatment apparatus of the present invention is configured as described in claims 1 and 2, and the purification treatment apparatus of the present invention is configured as described in claim 3.
The invention according to each of these claims is characterized in that, in the drainage device, an overflow pipe in which an inlet portion is disposed for a solid material remaining in an upstream area than the flow rate adjusting means is provided, and the solid material is provided through the overflow pipe. This is a technology that enables simple and efficient discharge of solids without using an air lift, a submersible pump, or the like, by using a configuration that discharges solids out of the apparatus.
[0006]
The sewage treatment apparatus according to claim 1 is for treating the inflowing treated water and discharging the treated water as treated water to the treated water destination, and receiving wastewater having a relatively low concentration of pollutants. Accept as treated water. The wastewater having a relatively low concentration of pollutants is a wastewater suitable for using the treated water as reused water (medium water). For example, wastewater mainly composed of bathroom drainage, wash sink drainage, and washing drainage is used. This corresponds to this. Conversely, for example, kitchen wastewater and toilet wastewater are wastewaters having relatively high concentrations of pollutants, and the treated water is generally difficult to use as reused water (medium water). The destinations for using middle water include a biological treatment device that receives water containing solid matter and performs predetermined biological treatment, as well as a storage facility and a sewer. For example, the biological treatment device can be arranged in the same tank as the sewage treatment device of the present invention.
[0007]
The sewage system of the present invention is provided with at least a flow control means, a discharge means and the like. The flow rate adjusting means has a configuration capable of adjusting the flow rate of the treated water flowing in the apparatus, and the amount of the flow flowing from the upstream region to the downstream region is adjusted, for example, according to the water level of the downstream region. You. In the upstream region, for example, a mechanism for aerobic treatment of the water to be treated, a mechanism for solid-liquid separation of solids such as sludge in the water to be treated, and the like are appropriately arranged. In the downstream region, for example, a mechanism for disinfecting the treated water before being transferred to the destination of the intermediate water, a mechanism for temporarily storing the treated water, and the like are appropriately arranged.
The discharging means discharges the water to be treated in an area on the upstream side of the flow rate adjusting means to the outside of the apparatus by overflow. Here, “outside the device” indicates a relationship based on the drainage device. Therefore, for example, when the purification treatment device including the underground water device is configured as one tank-shaped body, even if the portion is disposed in the same tank, this portion is disposed outside the treatment area of the underwater device. The case corresponds to “outside the device” in the present invention. Bathroom drainage, wash drainage, and laundry drainage are generated in large quantities constantly and the amount of drainage that flows into the equipment is more balanced than the amount of wastewater transferred to the destination of wastewater. By using the flow rate adjusting means and the discharging means, the water level in the upstream region can be maintained. In particular, the present invention is characterized in that the discharge means is constituted by using an overflow pipe. The overflow pipe has a configuration in which an inlet portion thereof is disposed for solid matter staying in the upstream region. As a result, the water containing the solid matter is discharged out of the apparatus due to the overflow in the overflow pipe. Such a solid is an unnecessary component when the treated water is used as recycled water (medium water). As described above, by using the overflow pipe of the present invention, the configuration can be simplified as compared with an air lift, a submersible pump, or the like that includes various control equipment such as a water level detection sensor, a timer, and a solenoid valve.
This makes it possible to reduce the cost of the device. In addition, when the overflow pipe of the present invention is used, a desired discharge amount can be easily secured, so that the effect of discharging water containing solid matter is high and efficient. Moreover, since the overflow pipe of the present invention contributes not only to the function of discharging solids but also to the function of maintaining the water level in the upstream region, which is an original function, the overflow pipe such as an overflow opening is omitted, and the overflow pipe is omitted. Can be unified. The “solid matter” in the present invention broadly includes other solid matter similar to sludge, including sludge locally deposited or retained. The solid may be separated by a solid-liquid separation mechanism or the like, or may be naturally deposited or accumulated due to a difference in specific gravity or the like in a series of processing steps.
As described above, the use of the construction technology of the middle water device according to claim 1 makes it possible to easily and efficiently discharge water containing solid matter without using an air lift or a submersible pump. .
[0008]
Here, the drainage device according to claim 1 is preferably configured such that the inlet portion of the overflow pipe is disposed in the solid matter depositing portion as described in claim 2. The solid depositing portion is a portion where solids separated from the water to be treated by the solid-liquid separation mechanism in the upstream region are deposited, and particularly a portion where the solid deposit is relatively large. As the solid-liquid separation mechanism, there are a configuration using a sedimentation / separation action of a solid substance and a configuration using a separation action by a filter medium such as a granular carrier.
As described above, the use of the construction technology of the middle water apparatus according to the second aspect is effective in efficiently discharging water containing solid matter having a relatively large accumulation amount.
[0009]
Further, a purification treatment apparatus according to a third aspect includes the middle water apparatus according to the first and second aspects. This purification treatment apparatus has a configuration in which water containing solid matter discharged through an overflow pipe is received and purified, and treated water after treatment is discharged outside the apparatus. For example, biological treatment (anaerobic treatment or aerobic treatment) is performed by separately receiving wastewater having a relatively high concentration of pollutants, such as kitchen wastewater and toilet wastewater, in addition to solids and foams separated from solids and liquids in the sewage system. Use the configuration. This makes it possible to unify the treatment of solids and the like generated in the wastewater device in a system different from that of the wastewater device, and to obtain wastewater with a higher purification degree. The mechanism for receiving and purifying water containing solid matter can be arranged in the same tank as the sewage system of the present invention.
As described above, by using the construction technology of the purification treatment device according to claim 3, the solid matter contained in the water to be treated can be easily and efficiently discharged, and the treatment generated in the middle water treatment device. It is possible to realize a rational processing technique that takes into account the processing of the product.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a purification treatment device of the present invention will be described with reference to the drawings. First, a schematic configuration of the purification treatment tank 100 will be described with reference to FIG. Here, FIG. 1 is a diagram showing a schematic configuration of a purification processing tank 100 which is an embodiment of the purification processing apparatus of the present invention.
[0011]
In the present embodiment, a description will be given of a technique in which two types of wastewater A and B discharged from general households and the like are received by respective corresponding treatment mechanisms, purified, and drained. Wastewater A is wastewater having a relatively low concentration of pollutants, and is suitable for using treated water as reused water (medium water). The drainage A mainly includes, for example, bathroom drainage, washing drainage, washing drainage, and the like, and usually contains foam components derived from various types of washing drainage. In general, wastewater B has a higher concentration load and a lower water load than wastewater A. On the other hand, the waste water B is a waste water having a relatively high concentration of pollutants, and is a waste water in which the treated water is generally difficult to use as reuse water (medium water). The drainage B mainly includes, for example, kitchen drainage, toilet drainage, and the like, and generally includes human waste caused by toilet drainage.
[0012]
As shown in FIG. 1, a purification tank 100 as a purification apparatus according to the present invention includes a main tank section 100a, a mechanical section 100b, and the like. The main tank unit 100a is formed in a single tank shape, and accommodates the first processing mechanism 101 and the second processing mechanism 102 in the tank.
[0013]
The first processing mechanism 101 includes a contact aeration chamber 110, a sedimentation chamber 120, a disinfection chamber 130, and a water storage chamber 140 in order from the upstream side (left side in FIG. 1) in the order of processing steps. The first treatment mechanism 101 receives the wastewater A of the type described above in the contact aeration chamber 110 and performs a purification treatment, and discharges the treated water after the purification treatment from the water storage chamber 140 as reused water (so-called middle water). It has a configuration. In the purification process, the sludge water including the foam generated in the contact aeration chamber 110 and the sludge generated in the sedimentation chamber 120 is transferred to the impurity removal tank 150 of the second processing mechanism 102. I have. This first processing mechanism 101 corresponds to the underground water device in the present invention.
[0014]
The second processing mechanism 102 includes a contaminant removal tank 150, an anaerobic filter bed tank 160, a carrier fluidized biological filtration tank 170, a treatment water tank 180, and a disinfection in order from the upstream side (the left side in FIG. 1) in the order of the processing steps. A tank 190 is provided. The second treatment mechanism 102 is configured to receive the wastewater B of the above-described type in the impurity removal tank 150, perform a purification treatment, and discharge treated water after the purification treatment from the disinfection tank 190. In the purification process, part of the treated water in the treated water tank 180 is transferred to the contaminant removal tank 150 as circulating water during the aeration operation described later. Further, the backwash water in the carrier fluidized biological filtration tank 170 is transferred to the contaminant removal tank 150 during the backwash operation described below.
[0015]
The mechanical unit 100b includes a control device 200, a water supply unit 210, a discharge pump 220, blowers 230 and 240, and the like. The water supply device 210 supplies water to the water storage chamber 140 of the first processing mechanism 101. The discharge pump 220 pressurizes the treated water extracted from the water storage chamber 140 of the first treatment mechanism 101 and discharges the treated water outside the system as reused water (medium water). This reused water is reused in toilets and the like. The blower 230 supplies aeration air and foam separation air to the first processing mechanism 101. The blower 240 supplies aeration / transfer air and backwash / transfer air to the second processing mechanism 102. The control device 200 controls the water supply device 210, the discharge pump 220, the blowers 230 and 240, and the like.
[0016]
Here, a specific configuration in the main tank portion 100a will be described in detail with reference to FIGS. FIG. 2 is a schematic diagram showing the configuration of the purification tank 100. FIG. 3 is a partially enlarged view of FIG. 2 and shows a mechanism for transferring sludge water and foam from the first processing mechanism 101 to the second processing mechanism 102.
First, a specific configuration of the first processing mechanism 101 will be described. As shown in FIG. 2, between the contact aeration chamber 110 and the sedimentation chamber 120, a partition wall 113 that partitions these two chambers is provided. A partition wall 123 is provided between the sedimentation chamber 120 and the water storage chamber 140 to partition the two chambers. Further, an overflow weir 133 is provided in the disinfecting chamber 130, and the treated water treated in the disinfecting chamber 130 flows to the water storage chamber 140 over the overflow weir 133.
[0017]
The drainage A received from the inflow port 111 of the main tank 100a first enters the contact aeration chamber 110. The contact aeration chamber 110 has a contact material filling portion 112, and the contact material filling portion 112 is filled with a predetermined amount of a contact material C1 to which aerobic microorganisms for aerobic treatment (oxidation) of an organic pollutant adhere. I have. An air diffuser 115 is provided below the contact material filling unit 112. The air diffuser 115 is connected to the blower 230 via an air supply pipe 231. By activating the blower 230, a predetermined amount of air for air (a plurality of air supply holes (not shown)) is introduced into the room. (A gas containing oxygen). Therefore, when the air for aeration is supplied from the air diffuser 115, the organic pollutants in the water to be treated are aerated when flowing down the contact material filling section 112 in the direction of the arrow in FIG.
[0018]
In the contact aeration chamber 110, a foam separation device 117 is provided downstream of the contact material filling section 112. The foam separating device 117 includes a box portion 118 whose lower side is open, an air diffuser 119 installed below the box portion 118, and the like. A foam discharge pipe 118a for discharging separated foam is provided at an upper portion of the box portion 118, and the foam discharge pipe 118a is connected to an overflow pipe 122 described later. The air diffuser 119 is connected to the blower 230 through an air supply pipe 232, and by activating the blower 230, a predetermined amount of air for foam separation (a plurality of air separation holes (not shown)) enters the room. (A gas containing oxygen). Therefore, when the air for foam separation is supplied from the air diffuser 119, the foam component in the water to be treated is foamed by the action of the air for foam separation, as shown in FIG. Stay near. Then, the foam is transferred in the foam discharge pipe 118 a by the gas flow of the foam separation air in the box section 118, merges with the overflow pipe 122, and is transferred to the impurity removing tank 150. The treated water treated in the contact aeration chamber 110 flows to the settling chamber 120 through an opening formed in the lower part of the partition wall 113.
[0019]
Returning to FIG. 2, the sedimentation chamber 120 is configured such that solid matter such as SS (hereinafter referred to as “sludge”) contained in the water to be treated is settled and separated and deposited on the bottom. The sedimentation chamber 120 itself constitutes the solid-liquid separation mechanism in the present invention. The sludge is mainly generated when aerobic microorganisms aerobically decompose (oxidize) organic pollutants in the contact aeration chamber 110.
[0020]
In the present embodiment, an overflow pipe 122 is provided in the precipitation chamber 120. The overflow pipe 122 has a vertical pipe part 122a and a horizontal pipe part 122b. The inlet of the vertical pipe 122a is arranged at the bottom of the sedimentation chamber 120, and the discharge point of the horizontal pipe 122b extends toward the impurity removing tank 150. Normally, the overflow pipe is used as an emergency response means, but in the present embodiment, the water level of the upstream region (the contact aeration chamber 110 and the sedimentation chamber 120) is adjusted by the regulating action of the flow rate adjusting device 124 described later. The overflow pipe 122 is used in accordance with the water level of the water storage chamber 140, which is the downstream area. When the water level of the sedimentation chamber 120 is adjusted from L1 to L2 in FIG. 3 by the flow rate adjusting device 124 and reaches a level similar to that of the horizontal pipe part 122b of the overflow pipe 122, the treated water in the sedimentation chamber 120 is overflowed by the overflow pipe 122. Then, it is transferred to the impurity removing tank 150. At this time, the sludge accumulated in the sludge accumulating portion 121 at the bottom of the sedimentation chamber 120 is transported inside the overflow pipe 122 together with the advancing water flowing therethrough as shown in FIG. And transferred to the contaminant removal tank 150. This sludge accumulation part 121 corresponds to the solid matter accumulation part in the present invention. As described above, in the present embodiment, the sludge water containing the sludge is simply and efficiently removed without using an air lift or a submersible pump, etc. (corresponding to “outside the apparatus” for the first processing mechanism 101). ).
The flow passage area and the like of the overflow pipe 122 can be appropriately determined according to the amount of overflow generated in the precipitation chamber 120.
[0021]
The treated water in the sedimentation chamber 120 flows to the disinfection chamber 130 via the flow control device 124. The disinfectant room 130 is provided with a disinfectant injection device 132, and the disinfectant injection device 132 performs a disinfection treatment of the treated water flowing from the sedimentation chamber 120, and the treated water after the disinfection treatment is stored over the overflow weir 133. Advancing to chamber 140. The water storage chamber 140 includes a water supply unit 210, a water level sensor 142, a discharge pump 220, and the like. Water supply device 210 adjusts the amount of clean water supplied to water storage chamber 140 based on water level detection information from water level sensor 142. The treated water stored in the water storage chamber 140 is discharged as reuse water (medium water) via the discharge pump 220. The discharge pump 220 is configured using an air lift pump, a submersible pump, or the like.
[0022]
Here, a detailed configuration of the flow rate adjusting device 124 will be described with reference to FIGS. 4 and 5. Here, FIG. 4 is a schematic diagram of the flow rate adjusting device 124 in FIG. 2 and shows a state where the water level of the water storage chamber 140 is low. FIG. 5 is a schematic view of the flow rate adjusting device 124, showing a state where the water level of the water storage chamber 140 is high. This flow control device 124 corresponds to the flow control means in the present invention.
[0023]
As shown in FIG. 4, the flow rate adjusting device 124 includes a flow rate adjusting pipe 125, a float member 126, a connecting rod member 127, and the like. The flow rate adjusting tube 125 is a member that communicates between the sedimentation chamber 120 and the disinfection chamber 130, and has a bellows-like flexible portion 125a. The float member 126 is a member that moves up and down according to the water level of the water storage chamber 140. The connection rod member 127 is a member for connecting between the flow rate adjusting pipe 125 and the float member 126, and is configured to support the flow rate adjusting pipe 125 from below.
[0024]
Therefore, when the water level of the water storage chamber 140 is, for example, in the state shown in FIG. 4, the connecting rod member 127 pushes down the flow rate adjustment pipe 125. Thereby, the flexible portion 125a is bent downward, and the discharge port is adjusted so as to face diagonally downward. In this state, the degree of restriction of the flow of the treated water flowing through the flow control pipe 125 is reduced, and the flow rate of the treated water flowing into the disinfection chamber 130 is adjusted in a direction to increase. Further, at this time, the water level in the sedimentation chamber 120 becomes, for example, L1 in FIG.
[0025]
On the other hand, when the water level in the water storage chamber 140 rises from the state shown in FIG. 4, the connecting rod member 127 pushes the flow rate adjustment pipe 125 upward. Thereby, as shown in FIG. 5, the adjustment is performed so that the flexible portion 125a bends upward and the discharge port faces obliquely upward.
In this state, the degree to which the flow of the treated water flowing through the flow control pipe 125 is regulated is increased, and the flow transferred to the disinfection chamber 130 is adjusted in a direction to reduce the flow. At this time, the water level in the sedimentation chamber 120 becomes, for example, L2 in FIG. 3, so that the sludge water is discharged through the overflow pipe 122.
[0026]
Next, returning to FIG. 2, a specific configuration of the second processing mechanism 102 will be described.
As shown in FIG. 2, a partition wall 153 is provided between the impurity removing tank 150 and the anaerobic filter bed tank 160 to partition both tanks. Note that the impurity removing tank 150 is partitioned from the water storage chamber 140 having the above-described configuration via a partition wall 143. Between the anaerobic filter bed tank 160 and the carrier fluidized biological filtration tank 170, a partition wall 163 that partitions these tanks is provided. Between the carrier flowing biological filtration tank 170 and the treated water tank 180, there is provided a partition wall 173 that partitions these tanks. Further, an overflow weir 193 is provided in the disinfecting tank 190, and the treated water treated in the disinfecting tank 190 flows over the overflow weir 193.
[0027]
The contaminant removal tank 150 includes baffle members 151 and 152, and removes contaminants contained in the treated water and wastewater B brought in from the first treatment mechanism 101 side, that is, large solids and fats and oils, into these baffle members 151 and 152. Solid-liquid separation / removal by baffle action of The treated water treated in the impurity removing tank 150 is transferred to the anaerobic filter bed tank 160 through the opening of the partition wall 153 by the principle of the extrusion flow.
[0028]
The anaerobic filter bed tank 160 has a filter bed 162, and the filter bed 162 is filled with a predetermined amount of a filter medium C2 to which anaerobic microorganisms that anaerobically treat (reduce) organic pollutants adhere. Therefore, the organic pollutants in the wastewater are anaerobically treated by anaerobic microorganisms when the filter medium C2 flows down in the direction of the arrow in FIG. The treated water treated in the anaerobic filter bed tank 160 is transferred to the carrier flowing biological filtration tank 170 through the opening of the partition wall 163 by the principle of the extrusion flow.
[0029]
The carrier fluidized biological filtration tank 170 is provided with an upper porous member 171 and a lower porous member 172. The carrier filling portion 174 formed between these porous members is filled with a predetermined amount of the granular carrier C3 to such an extent that it can flow in the tank. These porous members 171 and 172 are configured to allow the movement of the treatment water but prevent the movement of the granular carrier C3. The granular carrier C3 is formed in, for example, a granular hollow cylindrical shape. Aerobic microorganisms that aerobicly treat (oxidize) organic pollutants adhere to the granular carrier C3. Therefore, the organic pollutants in the wastewater are aerobically treated by aerobic microorganisms when flowing down the carrier filling section 174 in the direction of the arrow in FIG. As the material of the granular carrier C3, for example, inorganic carriers such as pearlite, shirasu balloon, foamed concrete, activated carbon, porous ceramic, and porous glass, and synthetic resin carriers such as polyethylene, polypropylene, polyvinyl chloride, and polyurethane are widely used. be able to.
[0030]
Further, the carrier flowing biological filtration tank 170 is provided with an air diffuser 175 and a backwashing device 176 for supplying air to the treated water in the tank via a blower 240. The air diffuser 175 is used during an air diffusion operation described later, and the backwashing device 176 is used during a backwash operation described later. The air diffuser 175 and the backwasher 176 have a plurality of air supply holes for supplying air. The air diffuser 175 is provided above the backwashing device 176 in the tank.
[0031]
The treated water tank 180 is provided with a first air lift pump 177 and a second air lift pump 187 having substantially the same configuration. The first air lift pump 177 is used during a backwash operation described below, and the second air lift pump 187 is used during a diffuse operation described later.
[0032]
The first air lift pump 177 includes a suction pipe 178 whose suction-side end is immersed in the bottom of the carrier flowing biological filtration tank 170, and a discharge pipe 179 extending from an upper portion of the suction pipe 178 toward the impurity removing tank 150, The air supply pipe 241 is connected to the suction pipe 178. The air supplied to the air supply pipe 241 via the blower 240 is supplied into the suction pipe 178. As a result, the treated water in the carrier fluidized biological filtration tank 170 is sucked from the suction pipe 178 as backwash water, transferred through the suction pipe 178 and the discharge pipe 179, and is discharged from the discharge-side end of the discharge pipe 179 into the contaminant removal tank 150. Is discharged to
[0033]
The second air lift pump 187 includes a suction pipe 188 whose suction end is immersed in the bottom of the treated water tank 180, and a discharge pipe 189 extending from the upper part of the suction pipe 188 toward the impurity removing tank 150. Is connected to an air supply pipe 242 described later. The air supplied to the air supply pipe 242 via the blower 240 is supplied into the suction pipe 188. As a result, the treated water in the treated water tank 180 is sucked from the suction pipe 188, transferred through the suction pipe 188 and the discharge pipe 189, and discharged from the outflow end of the discharge pipe 189 to the impurity removing tank 150. As a result, the treated water in the treated water tank 180 is circulated through the second air lift pump 187 between the treated water tank 180 and the impurity removing tank 150 upstream of the treated water tank 180. Note that the amount of air supplied to the first air lift pump 177 is set to be larger than the amount of air supplied to the second air lift pump 187. Thereby, the transfer amount of the backwash water can be larger than the transfer amount of the circulating water, and the backwash operation of the carrier fluidized biological filtration tank 170 can be performed in a shorter time.
[0034]
The disinfecting tank 190 is provided with a disinfectant injecting device 192. The disinfecting agent injecting device 192 disinfects the treated water flowing from the treatment water tank 180, and discharges the treated water after the disinfecting treatment out of the system through the outflow pipe 194. It is configured to
[0035]
In the aeration operation of the carrier flowing biological filtration tank 170, a predetermined amount of air is supplied from the air diffuser 175 into the tank. Thus, an aerobic treatment region (biological treatment region) is formed above the air diffuser 175, and a filtration treatment region is formed below the air diffuser 175. In the aerobic treatment region, aerobic treatment (oxidation) of organic pollutants is performed by aerobic microorganisms to which air is applied, while in the filtration treatment region, solids such as sludge generated by the aerobic treatment are removed. Captured by the particulate carrier C3. At this time, the granular carrier C3 in the aerobic treatment area flows in the tank together with the treated water by the air flow of the air supplied from the air diffuser 175. Thereby, uniform treatment of the treated water in the tank is performed. Further, in this air diffusing operation, the second air lift pump 187 is operated to circulate the circulating water as described above.
[0036]
In the backwashing operation of the carrier fluidized biological filtration tank 170, a predetermined amount of air is supplied from the backwashing device 176 into the tank. For example, it is set so that more air is supplied than during the air diffusing operation. Thereby, the whole granular carrier C3 of the carrier filling section 174 (aerobic treatment region and filtration treatment region) flows in the tank together with the treated water. Thereby, solids such as sludge captured by the granular carrier C3 are peeled off. In this backwashing operation, as described above, the first air lift pump 177 is operated, and water containing solids such as sludge is transferred to the impurity removing tank 150 as backwashing water.
[0037]
As described above, according to the present embodiment, a configuration is used in which the sludge accumulated in the sludge accumulation section 121 of the sedimentation chamber 120 is discharged through the overflow pipe 122. The waste can be easily and efficiently discharged to the impurity removing tank 150 without using it. That is, by using the overflow pipe 122, the configuration can be simplified as compared with an air lift, a submersible pump, or the like that includes various control equipment such as a water level detection sensor, a timer, and a solenoid valve. Thereby, the cost of the apparatus can be reduced. In addition, by using the overflow pipe 122, a desired discharge amount can be easily secured, so that the effect of discharging water including sludge is high and efficient. In addition, since the overflow pipe 122 contributes not only to the sludge discharge function but also to the original function of maintaining the water level in the upstream area, the overflow opening conventionally provided in the contact aeration chamber 110 or the like is omitted. can do.
Further, in the present embodiment, since the inlet of the overflow pipe 122 is disposed in the sludge depositing section 121 where the sludge separated into solid and liquid in the sedimentation chamber 120 is deposited, water containing sludge having a relatively large deposition amount can be efficiently used. It is effective to discharge to
Further, according to the present embodiment, two types of wastewater A and B having different pollutant concentrations are subjected to purification treatment by different treatment mechanisms, respectively, so that treated water discharged from the treatment mechanism with the lower pollutant concentration is treated. It can be reused as reused water (medium water). The purification treatment tank 100 according to the present embodiment is different from a so-called combined treatment purification tank that purifies wastewater having various pollutant concentrations in combination with the treated water after the purification treatment in the first treatment mechanism 101. Water resources can be used effectively by reusing them as toilets.
Further, according to the present embodiment, since the foam and the sludge are discharged from the first processing mechanism 101, the concentration load on the first processing mechanism 101 is reduced, and the reuse with a higher purification degree is performed. Water (medium water) can be obtained.
Further, according to the present embodiment, since the first processing mechanism 101 and the second processing mechanism 102 are configured to be housed in the main tank section 100a, a compact purification processing tank 100 can be realized.
[0038]
[Other embodiments]
Note that the present invention is not limited to the above-described embodiment, and various applications and modifications are conceivable. For example, each of the following embodiments to which the above embodiment is applied can be implemented.
[0039]
In the above-described embodiment, the sedimentation chamber 120 for performing solid-liquid separation by sedimentation of sludge has been described. it can.
In addition, the present invention is applicable not only to the discharge of sludge but also to the discharge technology of other solid substances similar to sludge.
[0040]
【The invention's effect】
As described above, according to the present invention, in a wastewater treatment apparatus configured to treat inflowed treated water and discharge treated water as treated water to the treated water destination, It has become possible to realize a technology that is effective for easily and efficiently discharging materials.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a purification processing tank 100 which is an embodiment of a purification processing apparatus of the present invention.
FIG. 2 is a schematic diagram showing a configuration of a purification treatment tank 100.
3 is a partially enlarged view of FIG. 2, showing a mechanism for transferring sludge water and foam from a first processing mechanism 101 to a second processing mechanism 102. FIG.
FIG. 4 is a schematic diagram of the flow rate adjusting device 124 in FIG. 2, showing a state where the water level of a water storage chamber 140 is low.
FIG. 5 is a schematic diagram of the flow rate adjusting device 124 in FIG. 2, showing a state where the water level of the water storage chamber 140 is high.
[Explanation of symbols]
100 ... purification treatment tank (purification treatment device)
100a… Main tank
100b… Mechanical part
101: first treatment mechanism (medium water system)
102: second processing mechanism
110 contact aeration chamber (solid-liquid separation mechanism)
117: Foam separation device
118 ... Box section
118a: Foam discharge pipe
120 ... sedimentation chamber
121… Sludge accumulation part
122 ... Overflow pipe
122a: Vertical tube section
122b: Horizontal pipe
124 flow rate adjusting device (flow rate adjusting means)
130 ... Disinfection room
140… Reservoir
150 ... Contaminant removal tank
160 ... Anaerobic filter bed tank
170 ... Carrier flowing biological filtration tank
180 ... Treatment tank
190… Disinfection tank

Claims (3)

A sewage treatment apparatus configured to treat inflowing water to be treated and then discharge the sewage to the sewage use destination as sewage,
Flow rate adjustment means capable of adjusting the flow rate of the treated water advancing in the apparatus, and discharge means for discharging the water to be treated in the upstream region than the flow rate adjustment means to the outside of the apparatus by overflow,
The discharge means includes an overflow pipe in which an inlet portion is arranged for solid matter deposited in the upstream area, and water containing the solid matter is discharged outside the apparatus by overflow in the overflow pipe. Sewage equipment characterized by being carried out. The sewage system according to claim 1,
The upstream region includes a solid-liquid separation mechanism for separating solids in the water to be treated, and an inlet portion of the overflow pipe is disposed in a solid depositing portion where solids separated by the solid-liquid separation mechanism are deposited. An underground water device characterized by the following. The apparatus according to claim 1, further comprising: receiving the water containing solid matter discharged through the overflow pipe, purifying the water, and discharging the treated water outside the apparatus. Purification treatment apparatus characterized by the above-mentioned.

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