JP4446122B2 - Waste liquid treatment equipment and treatment system - Google Patents

Description

  The present invention relates to a waste liquid processing apparatus and the like, and more particularly, to a waste liquid processing apparatus after pretreatment for removing coarse floating solids such as wood chips and sand from the waste liquid, and a processing system therefor.

  Today, the problems of urban / life pollution and global environmental problems caused by mass production, mass consumption, mass disposal type socio-economic activities are becoming serious. In particular, because it is important to maintain a good water environment for all living organisms, efforts are made not to cause water pollution such as river water, lake water, marine water, and groundwater from industrial wastewater, domestic wastewater, wastewater drainage, etc. Yes. Specific causes of water pollution include, for example, domestic wastewater generated by people's lives, industrial wastewater discharged from paper, food, steel, automobiles, petroleum products, chemical factories, weeding of agricultural land, and insect control. There are pesticides to be sprayed, waste water drained by pollutants contained in the wastewater washed out by rainwater and flowing into the river, but the generated load (COD: chemical oxygen demand [chemical oxygen demand] The amount of domestic wastewater is the largest, followed by industrial wastewater. And today, these wastewaters can be discharged into rivers only after being treated in some way and below the publicly acceptable standard value. Since industrial wastewater is discharged during business activities, it is often the case that continuous wastewater is discharged in large quantities due to its nature, and therefore a large amount of continuous water treatment is required before discharge. For example, there are waste liquids discharged from establishments such as food manufacturing industry, liquor manufacturing industry, wood / wood products manufacturing industry, restaurant / inn business, etc., and these waste liquids are, for example, food manufacturing industry , Livestock / fishery products, vegetable / fruit related products, miso / soy sauce production, bread / confectionery production, noodle production, potato production, valve, etc. The value of organic substances represented by demand (biochemical oxygen demand) and suspended solids represented by SS (suspended solid: suspended organic-inorganic substances in water) is large, and it is not easy to process them in large quantities. Automobiles containing heavy metals such as Cr and Zn in wastewater from liquor production processes such as beer, whiskey, sake, shochu, etc., wastewater from high-concentration SS and wood / wood products production processes including fiber, and washing and painting The same applies to wastewater from related business processes.

FIG. 14 shows a shochu waste liquid treatment process as an example of the prior art. Raw water as a shochu waste liquid (shochu lees) having a water content of 90% or more and an acidity of pH 4 and high concentration BOD and COD values is shown. It is put into a belt press machine and dehydrated, and the dehydrated cake is collected for incineration, fertilization and the like. After the filtrate is once stored in the adjustment tank, it is put into a microbial treatment tank for aerobic fermentation treatment via aerobic microorganisms at appropriate timing or methane gasification treatment by anaerobic microorganisms in an enclosed room where oxygen is blocked. After being accommodated and undergoing each process, it was used according to the purpose. However, in this conventional method, there is a limit to the microorganism treatment capacity in the microorganism treatment tank. For example, one treatment tank is about 20 m × 10 m × 3 m in length × width × height in a plane and 30 m ³ / day. A degree of throughput was normal. Therefore, conventionally, raw water discharged every day is supplied according to the ability of the microorganism treatment tank. However, a large amount of suspended suspended matter (SS) is still contained in the filtrate of the squeezed waste liquid after dehydration. Therefore, it is necessary to store the filtrate after dehydration using a large flow rate adjusting tank, and in addition, there are few cases where the processing according to the rated purification capacity of the microorganism treatment tank is stably performed, for example, There was a risk that the river effluent would be below the official standard. That is, since a high-concentration SS component is contained in the filtrate after dehydration, the biological treatment capacity in the microorganism treatment tank is lowered, and purification treatment as rated is difficult to achieve. In addition, due to the SS component, the inside of the microbial treatment tank is contaminated in a short time, and it is necessary to constantly clean the inside of the tank in order to maintain the processing performance, which requires labor costs and labor. On the other hand, in order to remove the SS component, for example, a processing plant for removing low specific gravity particulate matter (SS component) and a processing plant for removing high specific gravity particulate matter are separately prepared and sequentially passed through the respective plants. However, the entire apparatus is large and requires a long installation space, and the equipment cost is high, which cannot be adopted. In addition, since processing is performed by another plant, there is a problem that processing time is lost and processing capacity is reduced. Even in the conventional microbial treatment tank, a large amount of treatment can be secured by reducing the input amount, taking time, and further increasing the number of treatment tanks. There is a problem that space is required, and apparatus and equipment for setting conditions in the processing tank are required, the cost is high, and the performance for waste liquid treatment is low. On the other hand, for example, a food waste liquid treatment method as disclosed in Patent Document 1 has been proposed for the treatment of shochu waste liquid.
JP-A-11-207371

  In the processing method of the above-mentioned Patent Document 1, a plurality of flat box-like containers whose upper surfaces are opened are arranged in a fence shape with a space in the vertical direction, and a rotation shaft is provided so as to penetrate the container up and down. Stirrers are fixed radially to the rotating shaft so that they can be inserted into the container, and treated base soils that are a mixture of multiple soil materials and microbial materials containing soil fungi are laid on each container. Etc., rotate the stirrer through the rotating shaft, stir the treated base soil, evaporate the liquid content of the food waste liquid, and try to decompose the solid content of the food waste liquid by soil fungi . However, in this method, the waste liquid must be sprayed on the pretreated basement soil, and then the soil must be stirred for evaporation of the liquid content. Not only is it far inferior to the treatment tank, but it also requires multiple containers, their rotation mechanism, driving power, etc. in terms of cost, and is not obtained at a low cost. For continuous treatment of a large amount of treatment liquid It was not practical at all. In other words, the method of Patent Document 1 can treat only a small amount of shochu liquor at a time, and can be applied only when a small amount of waste liquor is generated and raw water to be treated every other day is generated. It was a thing.

  The present invention has been made in view of the above-described conventional problems, and one object of the present invention is that it can be manufactured at a low cost with a simple structure, and can be installed in a small and small space. It is an object of the present invention to provide a waste liquid treatment apparatus and a treatment system that can maintain high treatment performance.

In order to achieve the above object, the present invention is an apparatus for treating waste liquid after pretreatment including sand removal and rough floating solid matter removal, and promotes agglomeration reaction of continuously input waste liquid in contact with a flocculant. And collecting the liquid mainly collected by the aggregated precipitated particles after the reaction, and introducing the liquid collected by the aggregated precipitated particle collecting unit 16 to obtain the relative high specific gravity particle component therein. A precipitate separation unit 18 for separating the precipitate, and a discharge unit 20 for discharging the treated fresh water separated by the precipitation separation unit 18. The aggregated and precipitated particle recovery unit 16 and the precipitation separation unit 18 are long in one direction. The tank body is provided adjacent to the divided sections (165, 185) partitioned so as to be divided into two along the longitudinal direction, and the agglomerated precipitated particle recovery unit 16 increases the suspended suspended matter in the waste liquid. Capturing the liquid containing the relative high density particle component Have a floating suspended matter trapping mechanism 58 for supplying a non-liquid continuously to precipitate separating unit 18, the one end of the coagulation-sedimentation particle recovery section 16, to reverse the flow of effluent from the coagulating sedimentation particle recovery section 16 The waste liquid treatment apparatus 10 is provided with a reverse introduction mechanism 64 that is introduced into the precipitation separation unit 18 . While the waste liquid is continuously fed into one treatment tank, the large specific gravity particle component in the waste liquid is precipitated and separated, only the suspended suspended solids are captured and only fresh water is continuously discharged. Suspended suspended solids and large specific gravity particle components remaining in the tank other than fresh water are discharged by batch processing. By processing the liquid after removing suspended suspended solids, and processing the liquid containing aggregated sediment particles or large specific gravity particle components, reliable and smooth continuous processing of the waste liquid is performed.

  At that time, the agglomerated sediment particle recovery unit 16 and the sediment separation unit 18 may include an agglomerated sediment particle recovery tank 165 and a sediment separation tank 185 for continuously receiving and processing the waste liquid to be processed, respectively, thereby enabling continuous mass processing. It becomes possible. Although the external shape of the tank body is not particularly limited, it is preferable that the flow path is long in one direction, and is small and compact.

  The suspended suspended matter capturing mechanism 58 includes a blocking wall structure 60 including a blocking wall 50 provided so as to block the flow of waste liquid charged into the agglomerated sediment collection tank 165, and a lower wall side of the blocking wall 50. It is preferable to include an outlet opening 62 that is provided and forms a part of the agglomerated precipitated particle recovery part.

Further, the reversal introduction mechanism 64 rises with one end side connected to an outlet opening 62 provided at the lower end of the blocking wall 50 of the agglomerated precipitated particle collection unit 16, and the other end side is an inlet at an upper position of the front wall 68 of the precipitation separation unit 18. It is preferable to include a rising tube 66 connected to the opening 70 in communication.

Further, the waste liquid to be treated is continuously charged into the coagulated sediment particle recovery tank 165, and the liquid L1 mainly containing the aggregated sediment particles after the reaction is supplied via the liquid pressure of the waste liquid charged into the coagulated sediment particle recovery tank 165 side. The rising pipe 66 is lifted so as to be introduced into the precipitation separation tank through the inlet opening 70 so that the liquid level heights in the aggregated precipitation particle recovery tank 165 and the precipitation separation tank 185 are substantially the same. .

  In addition, the agglomerated precipitated particle recovery unit 16 is provided with a means for extending the flow of the waste liquid flow, and the precipitation separation unit 18 is provided with a means for promoting the separation of the agglomerated sediment component and the large specific gravity particle component from the discharged fresh water. Good.

In addition, the means for promoting the separation of the large specific gravity particle component from the discharged fresh water in the sedimentation separation unit 18 may include a plurality of first partition members 90 that flow in a manner in which the flow of the waste liquid flows over the upper end of the wall. .

Further, the means for promoting the separation of the large specific gravity particle component from the discharged fresh water L2 in the sediment separation unit 18 is formed through the lower opening so that the lower liquid 89 is formed between the bottom 86 of the flow path F and the waste liquid is submerged. It is preferable that the second partition member 92 to be flown is included, and the first and second partition members 90 and 92 are arranged alternately with being separated in the stroke of the flow path F.

  Furthermore, the sediment separator 18 may be provided with a partition 88 along the flow direction so as to reverse the flow after the reversal.

Further, the bottom surface 52/86 of the aggregated precipitated particle recovery tank 165 and / or the precipitation separation tank 185 may be provided so as to be inclined along the direction in which the waste liquid flows.

In addition, the liquid L1 that mainly communicates with the aggregated sediment particles after the reaction in the aggregated sediment particle recovery unit 16 communicates with the outlet opening 62 provided in the aggregated sediment particle recovery unit 16 or is introduced to the precipitation separation unit 18 side. An on-off valve mechanism 78 that switches between discharging and switching freely may be provided.

Further, the present invention is a waste liquid treatment system including the waste liquid treatment apparatus 10 according to claim 10, wherein the liquid discharged from the on-off valve mechanism 78 of the waste liquid treatment apparatus 10 and / or the fresh water discharged from the precipitation separation tank. An open container-type net body filtration device 96 that continuously receives and filters the waste liquid treatment system 10 is constituted by a waste liquid treatment system disposed adjacent to the waste liquid treatment device 10.

  The waste liquid treatment apparatus of the present invention is a waste liquid treatment apparatus after pretreatment including sand removal and rough floating solids removal, and after the reaction while promoting the agglomeration reaction of the continuously introduced waste liquid in contact with the flocculant The agglomerated sedimentation particle recovery part that collects the liquid mainly containing the agglomerated sedimentation particles, and the sedimentation separation part that introduces the liquid collected in the agglomerated sedimentation particle recovery part and precipitates and separates the components of the large specific gravity particles therein And a discharge unit that discharges the treated fresh water after being separated by the precipitation separation unit, and the aggregated precipitation particle recovery unit captures a liquid containing a large amount of suspended suspended solids in the waste liquid and has a relative large specific gravity. Because it has a suspended suspended solids capture mechanism that continuously supplies liquid containing particle components to the precipitation separation unit, the liquid after removal of suspended suspended solids can be continuously supplied to the precipitation separation unit. Smooth treatment of waste liquid can be performed. Moreover, the process of the liquid containing the relative large specific gravity particle component after SS component removal can be processed with a simple structure.

  In addition, since the aggregated precipitation particle recovery unit and the precipitation separation unit are configured to include an aggregated precipitation particle recovery tank and a precipitation separation tank that continuously receive and process the waste liquid to be processed, respectively, Transport of processed liquid and precipitation separation process can be realized with a simple configuration. And thereby, the effectiveness of continuous mass processing can be secured.

  In addition, the suspended suspended matter trapping mechanism includes a blocking wall structure including a blocking wall provided to block the flow of waste liquid charged into the agglomerated precipitated particle collection tank, and an aggregated precipitated particle provided on the lower end side of the blocking wall. By including an outlet opening that forms a part of the recovery unit, suspended solids that are difficult to separate can be captured effectively with a very simple structure, reducing costs and downsizing the device. To contribute.

  In addition, a tank body that is long in one direction is divided so as to be divided into two along the longitudinal direction, and the divided tanks are set as an agglomerated sedimentation particle recovery tank and a sedimentation separation tank. By adopting a structure with a reversal introduction mechanism for reversing the flow and introducing it into the precipitation separation part, the liquid containing a large amount of suspended suspended solids in the waste liquid is captured by one tank, and the aggregated precipitation components and relative A simple and small device can be configured to continuously supply liquid containing a large specific gravity particle component to the precipitation separation unit and finally discharge only fresh water or treated liquid approximate to fresh water to the outside by precipitation separation processing. In addition, it is possible to realize a configuration that maintains higher purification performance. Further, the cost of the apparatus can be reduced.

  Further, the reverse introduction mechanism has one end connected to an outlet opening provided at the lower end of the blocking wall of the aggregated sediment recovery part, and the other end is connected to the inlet opening at the upper position of the front wall of the precipitation separator. Because it is a configuration that includes a riser tube, it not only realizes a configuration that ensures high purification performance while also redirecting the liquid flow from the agglomerated sedimentation particle recovery tank to the sedimentation separation layer to make a small device, Introducing a continuous treatment configuration with a natural flow without using forced power for the flow of waste liquid by introducing it into the sedimentation separation section from the discharge opening of the preceding aggregated sedimentation particle recovery section instead of a U-shaped tube Can do.

  The agglomerated sediment particle recovery unit is provided with a means for extending the flow of the waste liquid, and the precipitation separation unit is provided with a means for promoting the separation of the agglomerated sediment component and the large specific gravity particle component from the discharged fresh water. By adopting the configuration, the coagulation sedimentation treatment and the separation promoting treatment from the fresh water portion of the precipitation component and the large specific gravity particle component can be realized, the purification treatment performance can be kept high, and the tank body can be miniaturized.

  Further, the means for separating the high specific gravity particle component from the discharged fresh water in the sedimentation separation unit includes a plurality of first partition members that flow in a manner in which the flow of the waste liquid flows over the upper end of the wall and flows away. In each chamber partitioned by the respective first partition members, the sediment is retained and retained at the bottom, and the performance of the sedimentation separation process by the plurality of chambers can be kept high.

  In addition, the means for separating the large specific gravity particle component from the discharged fresh water in the sedimentation separation unit forms a lower opening with the bottom of the flow path so that the waste liquid flows through the lower opening so as to be submerged. The first and second partition members are alternately arranged separately from each other in the flow path stroke, so that the separation process of the precipitate in the precipitation separation unit can be reliably performed. .

  Further, the precipitation separation tank is provided with a partition along the flow direction so as to re-invert the flow after the reversal, so that the precipitation separation process by the first and second partition members can be sufficiently performed. At the same time, the effect of downsizing the device can be ensured.

  In addition, the waste liquid to be treated is continuously charged into the agglomerated sediment particle recovery tank, and the liquid mainly containing the aggregated sediment particles after the reaction is aggregated via the liquid pressure of the waste liquid charged into the agglomerated sediment particle recovery tank side. For the flow of waste liquid, it is configured to rise in the riser pipe and be introduced into the precipitation separation tank from the inlet opening so that the liquid level height in the particle recovery tank and the precipitation separation tank is substantially the same. In addition to simplifying the device configuration and reducing costs without requiring any special power, it also enables the continuous processing configuration of the raw water waste liquid to be flown by a natural flow.

  In addition, there is an open / close valve mechanism that communicates with the outlet opening and can freely switch between the liquid containing mainly the aggregated precipitated particles after the reaction in the aggregated precipitated particle recovery unit being introduced into the precipitation separation unit or discharged to the outside. With this configuration, the on-off valve can be switched according to whether the apparatus is in operation or not, and can be easily cleaned by switching to the external discharge mode, particularly when cleaning the tank.

  Further, by setting the bottom surface of the agglomerated precipitated particle recovery tank and / or the precipitation separation tank to be inclined along the direction in which the waste liquid flows, the washing in the tank and the precipitation separation efficiency can be improved.

  In addition, the present invention provides an open container type net body filtration device for continuously receiving and filtering the liquid discharged by the on-off valve mechanism of the waste liquid treatment apparatus and / or the fresh water discharged from the precipitation separation tank. Since it is composed of a waste liquid treatment system located adjacent to the device, this liquid is continuously filtered while accepting only a large amount of fresh water after removing suspended suspended solids and coagulated sediment components or large specific gravity particle components, For example, it is possible to reduce the load on the biological treatment apparatus and maintain a reliable rated operation or higher treatment performance.

  Also, when processing waste liquid after pretreatment including sand removal and rough floating solids removal, the waste liquid is continuously fed into one treatment tank, and large specific gravity particles in the waste liquid are precipitated and separated to capture only suspended suspended solids. In addition, it is possible to continuously discharge only the clear water, and the suspended suspended solids and large specific particle component soot are batch processed and discharged. As a result, the waste liquid can be reliably and smoothly continuously processed. Moreover, the process of the liquid containing the relative large specific gravity particle component after SS component removal can be processed with a simple structure.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The present invention is an apparatus for treating waste liquid after pretreatment from which coarse floating solids such as sand, wood pieces, and fiber pieces in waste liquid discharged from domestic wastewater and various business entities are removed. For example, shochu and other liquors It is advantageously applied to the treatment of waste liquids during production, food production, waste liquids produced in the manufacturing process of wood and wood products, other organic waste liquids, and waste liquids containing other inorganic components and containing a large amount of suspended suspended solids. Is.

  FIG. 1 is a plan configuration diagram of a waste liquid processing system including a waste liquid processing apparatus according to an embodiment of the present invention. In this embodiment, the waste liquid processing system includes a waste liquid processing apparatus 10 and a processed liquid. And a filtration device 96 that performs continuous filtration processing. 2 to 7 show the waste liquid treatment apparatus 10, and the waste liquid treatment apparatus 10 will be described below with reference to the drawings.

  In FIG. 1, the waste liquid treatment apparatus 10 includes an agglomeration reaction unit 14 for an input waste liquid L, an agglomerated precipitated particle recovery unit 16, a precipitation separation unit 18, and a discharge unit 20. Specifically, in FIG. 1, the waste liquid treatment apparatus 10 is composed of a rectangular parallelepiped box-shaped tank as a whole. That is, the aggregated sedimentation particle recovery unit 16 and the sedimentation separation unit 18 each include a rectangular parallelepiped aggregated sedimentation particle recovery tank 165 and a sedimentation separation tank 185 that are long in one direction. And the precipitation separation tank 185 are joined together in a parallel state to form a box-shaped tank body 101 having a rectangular parallelepiped shape as a whole. The agglomerated sediment collection tank 165 and the sedimentation separation tank 185 continuously receive and treat the waste liquid to be treated, and finally remove the treated agglomerated sediment material and SS components, resulting in BOD and COD values. The treated liquid that has decreased is discharged to the outside.

  In the present embodiment, raw water waste liquid to be treated is introduced into one side surface side of the box-shaped tank body 101, and a large specific gravity particle component liquid take-out means described later or a treated treatment water or fresh water discharge unit 20 is disposed on the other side surface side. Is provided. In FIG. 1, a vertically long agglomeration reaction tank 22 is provided so as to be surrounded by a wall including an end wall on the raw water waste liquid input side. The agglomeration reaction tank 22 is an agglomeration reaction unit 14 that causes the raw water waste liquid to be brought into contact with the agglutination reaction agent to react. A flocculant is introduced. The agglomeration reaction tank 22 is a floc generating means for waste liquid that generates floc waste liquid by adding a flocculant into organic waste liquid from which gravel, large floating wood chips, etc. are removed, and the charged state of particles in the liquid To promote solid-liquid separation by promoting the bonding between particles and growing the flocs to such a size that they can be precipitated by the crosslinking action. In the embodiment, the aggregation reaction tank 22 is provided with a stirring device 28 including a stirring motor 24 and a stirring blade 26 connected to the stirring motor 24. In addition, a corner partition 30 is provided at the corner of the agglomeration reaction tank 22 so that the upper part is partitioned in a triangular shape and the lower end terminates midway and communicates with the stirring action chamber side. The corner partition 30 is a flocculant contact means for bringing the flocculant into contact with the raw water waste liquid before receiving the stirring action by the stirrer 28 and then supplying the flocculant to the stirring action chamber.

Specifically, in the present embodiment, the raw water waste liquid supply pipe 32 and the flocculant supply pipe 34 face the openings inside the corner partition 30 so as to introduce the waste liquid or the liquefied flocculant, respectively. Are arranged. The waste liquid treatment apparatus of the present invention is a small apparatus that continuously discharges treated waste liquid and continuously discharges treated water while processing the waste liquid. In the embodiment, the waste liquid supply pipe 32 coagulates raw water waste liquid with a pump (not shown). A continuous charging means for continuously charging the tank 22 in a flowing manner is configured. In this embodiment, as shown in FIG. 1, the flocculant dissolution tank 36, the subtank 40 that primarily stores the flocculant liquid that is dissolved in the dissolution tank and sent through the pump 38, and the flocculant liquid in the subtank is divided into corner partitions. A flocculant supply device including a pump 42 to be sent to the chamber is attached to the waste liquid treatment device. The dissolution tank is provided with blades 46 that are stirred and rotated via a motor 44. The raw water waste liquid contacted with the flocculant in the flocculant contact chamber inside the corner partition 30 is agitated by the rotation of the blades 26 in the main body chamber of the agglomeration reaction tank 22, and the agitated liquid is separated from the agglomerated sediment particle recovery tank 165. Overflow overflows through the overflow notch 49 formed on one end of the upper end edge of the wall 47 and flows into the aggregated sediment recovery tank 165 side.

  As described above, the box-shaped tank body 101 is a tank body that is long in one direction, and is divided and divided by the dividing wall 48 so as to divide the tank body into two along the longitudinal direction. The tanks are an agglomerated precipitated particle recovery tank 165 and a precipitation separation tank 185. The dividing wall 48 is divided and blocked so that the flow of the liquid in the agglomerated precipitated particle collection tank 165 and the precipitation separation tank 185 is not affected by each other. Then, as will be described later, the waste liquid is introduced into the precipitation separation unit 18 so that the flow of the waste liquid from the aggregated precipitation particle recovery unit 16 to the precipitation separation unit 18 is reversed.

  The agglomerated precipitated particle recovery unit 16 recovers and takes out only the liquid mainly containing particles precipitated by flock formation and other precipitated particle components while promoting the reaction of the waste liquid with the aggregating agent. This is a waste liquid processing flow path means for storing and holding the suspended suspended solids and other non-precipitated components, and in this embodiment, an agglomerated precipitated particle recovery tank 165 that is long in the left-right direction is included as a main component.

  As shown in FIGS. 3 and 4, the agglomerated precipitated particle recovery tank 165 is a tank body in which a waste liquid flow path F having a certain depth (for example, about 1.2 m) is formed on the inner side. Surrounded by walls. The recovery tank 165 is surrounded on all four sides by a partition wall 47 with the agglomeration reaction tank, both side walls, and a blocking wall 50 at the end of the flow, and its bottom is formed in a substantially V shape. Specifically, the V-shaped bottom portion 52 is composed of both oblique walls 52A and 52B inclined downward toward the opposite center side, and a U-shaped recessed portion 54 formed in the lower facing portion at the center. The large specific gravity component particles are guided by the inclined walls 52A and 52B, converge on the U-shaped recessed portion 54, and precipitate. Since the sediment converges on the U-shaped recessed portion 54 that is smaller than the lateral width of the flow path F, it does not take time to clean the inside of the tank, and can be performed in a short time with little effort. As shown in FIGS. 5, 2, and 4, the V-shaped bottom portion 52 is installed so as to be inclined linearly from the waste liquid input side N <b> 1 to the discharge side U <b> 1 side. This is convenient for cleaning and washing the inside of the tank as described above, and can move naturally to the downstream side without stagnation of the liquid flow due to the introduction of the flow-through type raw water waste liquid. In particular, the coagulated and precipitated components surely flow down to the downstream side, that is, the blocking wall side. Further, in the present embodiment, the agglomerated precipitated particle recovery tank 165 is provided with means for extending the flow of the waste liquid. In the present embodiment, the flow stroke extending means is spaced from the flow direction so as to block from the left and right side walls to the middle of the flow path in the middle of the linear flow from the waste liquid input side to the discharge side. It consists of a plurality of bypass walls 56 (five bypass walls 56 are provided in the example of FIG. 1) alternately projecting from the left and right side walls, and the waste liquid is as shown by arrow f1 in FIG. By being guided by these bypass walls 56 and flowing while meandering, the stroke is extended or the flow is delayed so that the raw water waste liquid sufficiently causes a coagulation reaction with the coagulant and precipitates floc. Note that the lower end side of the bypass wall 56 is terminated at a joint portion between the lower end of both side walls arranged vertically and the upper end of the inclined wall 52A of the V-shaped bottom 52, and is a vertically long rectangular plate as shown in FIG. It is formed by. Therefore, the lower side of the bypass wall 56 is communicated in a straight line from the waste liquid input side to the blocking wall 50 (straight gap), and the aggregated particles and the like naturally stay on the inclined downstream side for washing, etc. Can be done easily in a short time without any hassle.

  As described above, the agglomerated sediment particle recovery unit 16 including the agglomerated sediment particle recovery tank collects the liquid mainly containing the agglomerated sediment particles in the raw water waste liquid, and the suspended suspended matter in the liquid such as an SS component that is difficult to flock. The function that puts in the tank. That is, roughly speaking, the heavy solid component precipitated by flocs in the raw water is extracted, and the components floating on the liquid surface and the like are allowed to remain in the tank body. That is, the agglomerated precipitated particle recovery unit 16 has a suspended suspended matter capturing mechanism 58. In the present embodiment, the suspended suspended matter trapping mechanism 58 mainly includes the blocking wall structure 60 that blocks the flow of the waste liquid charged into the aggregated sediment collection tank, and the aggregated sediment particle components mainly from the lower end side of the end of the flow path. And an opening 62 for taking out and collecting the liquid. The blocking wall structure 60 includes a blocking wall 50 provided at the end of the flow of the waste liquid in the tank, and the blocking wall 50 finally blocks the flow of the waste liquid charged into the agglomerated sediment particle collection tank. As shown in FIG. 2, an outlet opening 62 is formed at the central portion of the blocking wall portion where the U-shaped recessed portion 54 of the V-shaped bottom portion 52 abuts against the blocking wall 50, that is, at the central position on the lower end side of the blocking wall 50. Thus, only the liquid mainly containing the precipitated particle component is discharged from the outlet opening 62 on the lower end side of the blocking wall, and the liquid mainly containing the suspended suspended matter on the liquid surface side is blocked by the blocking wall 50. It stays in the tank. Therefore, during the continuous operation of the raw water waste liquid, only the liquid mainly containing the precipitated particle component is discharged from the agglomerated precipitated particle recovery tank 165, and the liquid mainly containing the suspended suspended solids on the liquid surface side is discharged into the tank body. It is left to stay. And the liquid in the collection tank 165 is discharged | emitted in the time slot | zone when the injection | throwing-in on the raw | natural water side is stopped, At this time, a suspended suspended solid is induced | guided | derived to the filtration apparatus side, and it filters collectively.

  As described above, the waste liquid treatment apparatus according to the present embodiment partitions the box-shaped tank body 101 that is long in one direction into two at the center by the dividing wall 48 along the longitudinal direction, and collects the aggregated sediment particles. 165 and the precipitation separation tank 185 are juxtaposed in parallel. Therefore, the entire apparatus is very miniaturized and can be installed even in a small space.

  Further, in the present embodiment, an inversion introduction mechanism that introduces the precipitation separation unit 18 so as to reverse the flow of the waste liquid from the N1 to U1 direction from the aggregated precipitation particle recovery unit 16 so that the liquid flows from the U1 side to the N1 side. 64 is provided. The reversal introduction mechanism 64 is a flow reversing means for flowing the liquid L1 mainly containing the aggregated sediment particle component taken out from the aggregated sediment particle recovery unit 16 to the sedimentation separation unit side as a flow inverted in a U-turn shape. The liquid flow is redirected from 165 to the precipitate separation layer 185 to achieve a waste liquid treatment configuration with a small apparatus. In the embodiment, the reversal introduction mechanism 64 is arranged outside the aggregated sediment particle collection tank 165 or the sediment separation layer 185, and one end side is connected to the outlet opening 62 provided at the lower end of the blocking wall 50 of the aggregated sediment particle collection unit 16. The other end side is constituted by a riser pipe 66 for introducing a liquid so that the other side flows into the precipitation separation tank 185 of the precipitation separation unit 18 from an upper position. The other end side of the riser pipe 66 is connected to the inlet opening 70 at the upper position of the front wall 68 of the precipitation separation tank 185. Thus, not the simple U-shaped pipe but the agglomerated precipitated particle recovery part in the preceding stage. Since introduction from the discharge opening 62 to the precipitation separation portion is introduced from a high level, a continuous treatment configuration with a natural flow can be realized without using forced power for the flow of waste liquid. That is, since it is introduced into the precipitation separation tank from a high level, the liquid can flow in the precipitation separation tank only by the flow pressure of the liquid by continuously adding the raw water waste liquid.

  In detail, as shown in FIGS. 1 and 2, the rising pipe 66 extends from the horizontal pipe 74 and the vertical pipe 76 as shown in FIG. 2 from the middle of the straight pipe portion 72 that extends straight from the connection portion with the outlet opening 62. The L-shaped vertical pipe 76 is raised to a position approximately at the upper end of the height of the tank body. As described above, the liquid mainly containing the aggregated precipitated particles is taken out and collected by the aggregated precipitated particle recovery unit 16, while the liquid containing the suspended suspended matter is appropriately discharged to the outside by batch processing. At this time, the on-off valve mechanism 78 is provided at a position that protrudes more than the connection position of the rising pipe 66 of the straight pipe portion 72 that protrudes from the blocking wall 50 of the aggregated sediment collection tank 165. The on-off valve mechanism 78 communicates with the outlet opening 62 and can freely introduce a liquid mainly containing the aggregated precipitated particles after the reaction in the aggregated particle recovery unit 16 to the precipitation separation unit 18 side or discharge the liquid to the outside. In this embodiment, for example, a simple manual opening / closing valve is used. When the straight pipe portion 72 is closed by the manual opening / closing valve, the waste liquid coming out from the outlet opening 62 is sent to the rising side of the rising pipe, and when the straight pipe portion 72 is opened, the mesh body filtering device disposed adjacent to the present processing apparatus. Discharge towards

The sedimentation separation tank 185 provided in the agglomerated sedimentation particle recovery tank 165 is surrounded by a front wall 68, a dividing wall 48, a side wall 82, and a partition wall 84, and is configured in a top open container shape that is long in one direction. The other end side of the rising pipe 66 is connected to an inlet opening 70 formed at a position near the upper end of 68 so that the waste liquid from the previous stage flows down into the precipitation separation tank.

The precipitation separation tank 185 is a precipitation separation unit 18 serving as a precipitation separation unit that introduces the liquid collected by the aggregated sediment particle collection unit 16 and precipitates and separates the relative high specific gravity particle components therein. The fresh water portion and the liquid portion containing the aggregated precipitation particle component after the suspended suspended solids are removed by the recovery unit 16 are introduced into the final solution, and finally only the aggregated precipitation particle component and the large specific gravity particle component are retained, and the fresh water. Only the part is discharged to the outside. As shown in FIGS. 3 and 4, the sedimentation separation tank 185 is composed of a tank body having the same tank wall height as the agglomerated precipitated particle collection tank 165 and the same flow path width, and its bottom 86 is the collection tank 165. Unlike it, it is composed of a flat surface on the side. And the bottom part 86 is inclined and installed so that it may fall linearly from the N1 side to the U1 side similarly to the adjacent aggregation precipitation particle | grain collection tank 165. FIG. Therefore, as shown in FIG. 6 , the liquid introduced from the recovery tank 165 flows in an ascending gradient in the precipitation separation tank 185. In the sedimentation separation tank 185 itself, an intermediate partition 88 is attached at the center of the flow path width along the liquid flow direction, that is, the longitudinal direction of the tank body. The partition 88 reinverts the flow f2 of the liquid reversed and introduced in a U-turn shape via the reversal introduction mechanism 64 to prevent the apparatus from becoming long and large, and to keep the apparatus compact and to keep the agglomerated precipitated particle component. And a step of sufficiently separating the large specific gravity particle component from the fresh water portion to discharge the fresh water, and dividing the forward path and the return path in the flow path F into the left and right sides as shown in FIG. Shut off so as not to affect. As a result, the liquid introduced from the recovery tank 165 flows in an ascending gradient in the precipitation separation tank 185, and the returning path flows in a descending gradient.

  Further, the precipitation separation tank 185 is provided with a separation promoting means for separating the large specific gravity particle component from the fresh water to be discharged and promoting the separation. The separation promoting means includes a plurality of first partition members 90 that are provided in the middle of the flow path and flow in such a manner that the flow of the waste liquid flows over the upper end portion of the wall. The first partition member 90 is formed of a closing plate member that rises in a substantially vertical direction from the bottom portion 86 and joins the bottom portion 86 and the side wall portion of the outward path to shield the entire area near the upper portion of the outward path cross section. One is provided between the partition wall 84 and the front wall 68 in the return path. These first partition members form a plurality of partition chambers C between them or between them and an outer wall such as the partition wall 84 or the front wall 68, and the flow of the separated precipitated particles is separated for each partition chamber. Block individually. Incidentally, in the present embodiment, a total of five (C1 to C5) partition chambers C are provided in the reciprocating path between the outer wall and the first partition member (see FIG. 8). Therefore, when the waste liquid flows through these partition members by the turbulent flow LR, the sediment particles or large specific gravity components are captured for each partition chamber, and the pollutant having a large mass is removed from the liquid from which suspended suspended components are removed. Separate and remove so that only fresh water is discharged. In the present embodiment, a second partition member 92 is attached as a separation promoting means. The second partition member 92 is made of the same closing plate material as the first partition member, and both ends thereof are joined and fixed to both side walls of the flow path as shown in FIGS. 6 and 7, and a lower opening 89 is formed between the bottom portion 86 and the second partition member 92. It is provided to do. Then, the liquid that hits the second partition member 92 flows as a submerged flow LU that is submerged only from the lower opening 89. In the present embodiment, the first partition members 90 and the second partition members 2 are alternately arranged. Therefore, not only the evacuation of the barrier walls but also the vertical amplitude as shown in FIGS. The liquid is made to flow like waves that meander vertically. This ensures that the precipitated particles or high specific gravity particle components are separated and retained in each partition chamber. In the embodiment, as shown in FIGS. 6 and 10, the liquid introduced from the inlet opening 70 is narrowed in the drop space from the lower portion by the second partition member 92 inclined upward in the liquid traveling direction, and the flow velocity. And the speed is increased to shift to the first flow of the first partition member 90. Similarly, in the return path, as shown in FIGS. 7 and 10, the second partition member immediately before the last first partition member is also inclined to rise in the liquid traveling direction, and the last first The flow of the partition member 90 can be smoothly performed. As shown in FIG. 3, a V-shaped groove 94 is formed in the center of the upper end of the first partition member 90 just before the front wall, and a flow rate scale is displayed along the hypotenuse of the V-shape. (Not shown). As a result, the approximate flow rate of fresh water can be measured, and preparations in subsequent processing steps and preparations in biological processing steps can be facilitated. In the figure, reference numerals 150 and 151 denote drains with an open / close cock for discharging and washing the precipitated substances. This is a communication drain pipe having a tip projecting from the blocking wall 50.

  As described above, the liquid flowing in the aggregated precipitation particle recovery tank 165 and the precipitation separation tank 185 uses power that forcibly generates a flow including the liquid flowing in the rising direction in the rising pipe 66 of the reversal introduction mechanism 64. Without flowing, it is made to flow by the water pressure by the continuous input of the pouring type raw water waste liquid. That is, the liquid mainly containing the aggregated sediment particles after the reaction from the aggregated sediment particle recovery tank 165 is separated from the aggregated sediment particle recovery tank 165 via the liquid pressure of the waste liquid charged into the aggregated sediment particle recovery tank 165 side. The liquid rises in the riser 66 so that the liquid level is substantially the same as that in the separation tank 185 and is introduced into the precipitation separation tank 185 from the inlet opening 70. Therefore, waste liquid guidance and flow control are automatically performed, and waste liquid treatment with excellent purification ability can be performed with only a simple tank structure without requiring a special device.

  The liquid that escaped from the upper end of the last first partition member 90x removed the light suspended component (SS substance) in the agglomerated precipitated particle recovery tank 165 and the precipitated particle component and large specific gravity particle component in the precipitation separation tank 185. It becomes the liquid L2 close | similar to the clear water after this, and this is discharged | emitted from the discharge port as the discharge part 20 provided in the slightly lower position from the partition member 90x of the front wall part used as the butt | matching of a return path side, for example, is supplied to the following process. In this way, the liquid from which the light suspended components (SS substances) have been removed in a reliable manner and the condensed sediment substances and large specific gravity particle components have been removed is the BOD (biochemical oxygen demand) value. In addition, the COD (chemical oxygen demand) value is reduced to a considerable extent, and is supplied to a microbial treatment process with limited capacity to achieve a purification process that is acceptable for river discharge, for example. obtain.

  The waste liquid treatment apparatus according to the present invention has been described above. Next, a waste liquid treatment system provided with the treatment apparatus 10 will be described. In this waste liquid treatment system, the treated waste liquid from the waste liquid treatment apparatus 10 is treated. An open container type net body filtration device 96 is disposed adjacent to the waste liquid treatment device 10 so that it can be continuously processed. As shown in FIGS. 1 and 9, the open container-type net body filtering device 96 has an outer case 98 having an open top surface formed by four circumferential walls and a bottom wall, and a size smaller than the outer case disposed in the outer case 98. And a net body filtering case 100 having an open top surface. The net body filtration case 100 is a case body that is surrounded by a net body at least on four sides. The treated liquid is introduced into the inside and the filtered liquid that has passed through the net body is discharged to the outer case side, and the inside of the outer case is treated. The liquid is supplied to, for example, a microbial process via a pump 102 or the like. In the embodiment, for example, the mesh body filtering case 100 is provided with a rectangular parallelepiped metal mesh frame or a simple frame (not shown), and a net having strength and a mesh having a required mesh size is stretched inside. Configured. As long as the network structure with the upper surface opened can be held, the shape that holds the shape may be any external form such as a cylinder, other polygons, and irregular shapes. In addition, the mesh body filtering case is a case body structure in which a strong material such as a wire mesh having a desired mesh size is formed into a box shape with an open top surface, or a material having punched holes is joined and assembled. May be. According to this open container type net body filtration device 96, by continuously connecting the liquid to be processed to the discharge port and providing the connection input pipe 104 arranged in the net body filtration case 100 with the discharge port facing, Since it can be processed in large quantities and can be filtered in a short time, the waiting time for the next process is extremely short, and maintenance such as washing of the mesh for filtering the mesh body is always complete. And the filtration function can always be maintained at high performance. In addition, this open container type | mold net body filtration apparatus functions also as a buffer tank means for primary storage of the liquid before passing to a microorganisms process.

  Next, the operation of the above embodiment will be described while explaining the waste liquid treatment method of the present invention. The raw water waste liquid is the waste liquid after removing sand and removing rough floating solids such as wood chips. Specifically, the waste liquid after removing the coarse solids is subjected to a pretreatment such as a belt press or a filter press. And this waste liquid is a waste liquid which has high concentration BOD, COD, and SS component values, such as a shochu waste liquid, and is not allowed to be discharged into the river as it is. While continuously putting such waste liquid into one treatment tank, large specific gravity particle components in the waste liquid are precipitated and separated, and only suspended suspended substances are captured and only fresh water is continuously discharged. The suspended suspended matter and the large specific gravity particle component soot retained in the tank other than the fresh water are discharged by batch processing.

FIG. 11 is a flow chart showing a process of finally treating microorganisms using the waste liquid treatment system for shochu waste liquid treatment. After the raw water waste liquid is charged, it is dehydrated by a belt press (S1, S2) The dehydrated cake is used for fertilizer, feed, etc. The filtrate after dehydration is once prepared for a reaction treatment by skipping alcohol through an aeration tank (S3) by aeration. Thereafter, in S4, purification is performed through the waste liquid treatment system, and SS, BOD, and COD values are reduced to a remarkable level. In addition, in this system, for example, a liquid amount of about 10 m ³ / h can be purified. Thereafter, the sample is introduced into the microorganism treatment tank through the adjustment tank S5 for flow rate processing before being introduced into the microorganism treatment tank (S6). Since the normal microbial treatment apparatus is a processing capacity of 30 m 3 / ^24h, in the present system it can afford a sufficient processing time, therefore, or passed through a repeating this device in order to perform long process of that amount present device, or Sufficient pretreatment is possible, for example, by performing treatment with a device that has a longer waste liquid treatment flow path of the device to increase the treatment capacity, thereby further reducing SS, BOD, COD values, etc. It can be reduced.

(Test example)
FIG. 13 shows numerical values obtained by collecting and analyzing the waste liquid or the treatment liquid from the treatment process by the treatment flow of the shochu waste liquid test plant of FIG. In FIG. 12, the input amount, the processing amount, the generation amount, and the discharge amount at or from each step are shown. Sampling is performed for several selected main processes. The water sampling method was obtained by repeating the water sampling periodically from the process and calculating the average daily value of the waste liquid. In the table, (1) the rice washing waste liquid is for treating the rice sharpening juice for yeast production as a waste liquid together with the squeezed rice bran liquid during each finishing treatment of shochu. Further, the squeezed waste liquid is obtained by squeezing the raw water waste liquid with a cloth bag and squeezing the squeezed mash to a moisture content equivalent to the belt press treatment. (2) After the squeezed waste liquid filter, water was sampled from the middle of the piping and adjusted by mixing the squeezed waste liquid and the filter cloth washing water. The flow rate adjustment tank of (3) is sampled twice a day for a total of 18 times in the adjustment tank A accommodated by the conventional method that does not pass through the system of the present application and the flow rate adjustment tank B by the double line via the system of the present application. It is obtained. (4) The system of the present application was obtained by collecting water seven times in total, once / hour. The discharged water is collected from the discharge port of the discharged pipe of the discharged water after microbial treatment attached to the microbial treatment apparatus.

The BOD, SS, and COD values (mg / L) in the adjustment tank A according to the conventional method that does not pass through the system of the present application are 6,700, 1,500, and 1,900, respectively. In this case, the values are 4,800, 98, and 1,500, respectively, and it can be seen that all values can be reduced by going through the processing by the present apparatus. In particular, the SS value is greatly reduced, and the filtration process in the next step not only causes clogging of the apparatus but can continue the process stably, and also in the microorganism treatment apparatus, the BOD value and the COD value Contributes to a decrease. Specifically, for example, the discharge reference value example in one local government shown in (7), the treatment liquid after processing through the device of the present application is lower than the reference value in all indicators, whereas In the case of the method, a numerical value exceeding the reference value is detected. In this case, as shown in FIG. 10, in the system of the present application, a liquid amount process of about 10 m ³ / h is realized with an apparatus size of about 3 m × 2.7 m × 1.8 m in length × width × height. . Thus, the process as nominal 30 m 3 / ^24h microbial processor Alternatively, it is possible to further processing in reality since purification is superior of the input before the liquid.

  Waste liquid treatment apparatus of the present invention, its treatment system is a business related to food production, including livestock and aquatic products, vegetables and fruits, miso and soy sauce production, bread and confectionery production, noodle production, potato production, valve arts, etc. Liquor manufacturing industry, wood / wood products manufacturing industry, paper manufacturing, steel manufacturing, automobiles, petroleum products, industrial wastewater discharged from chemical factories, agricultural land weeding, agricultural chemicals sprayed for insect control, pollutants contained in waste It is a waste liquid discharged from establishments such as restaurants and ryokan businesses, and can be suitably applied to the treatment of waste liquid after pretreatment in which coarse suspended solids such as wood chips and sand are removed from the waste liquid.

1 is an overall plan view of a waste liquid treatment system according to an embodiment of the present invention. It is an AA arrow line view of FIG. It is a BB line arrow directional view of FIG. It is CC line arrow line view of FIG. FIG. 2 is a DD arrow view showing only the waste liquid treatment device portion of the system of FIG. 1. It is an EE arrow directional view which shows only the waste-liquid processing apparatus part of the system of FIG. It is a FF line arrow directional view which shows only the waste-liquid processing apparatus part of the system of FIG. It is a plane explanatory view showing the composition of partition chamber C of the sedimentation separation tank in the waste liquid processing apparatus of the system of FIG. It is a whole perspective view of the open container type net body filtration apparatus part of the system of FIG. It is a waste liquid flow chart which shows the flow of processing of the waste liquid in a box type tank. It is a flowchart figure of the process example of the shochu waste liquid process using this application processing system. It is a flowchart figure which shows simultaneously this application system and the conventional method of the shochu waste liquid processing concerning a test plant. It is a figure of the table | surface which shows the analysis result of the pollution index of the waste liquid obtained by taking water from the test plant of FIG. It is a flowchart figure which shows an example of the conventional waste liquid processing method (for example, shochu). FIG.

DESCRIPTION OF SYMBOLS 10 Waste liquid processing apparatus 12 Open container type net body filtration apparatus 14 Aggregation reaction part 16 Aggregation precipitation particle recovery part 165 Aggregation precipitation particle recovery tank 18 Precipitation separation part 185 Precipitation separation tank 20 Discharge part 22 Aggregation reaction tank 48 Dividing wall 50 Barrier wall 58 Suspended suspended substance capture mechanism 60 Blocking wall structure 62 Exit opening 64 Reverse introduction mechanism 66 Rising pipe 68 Front wall 70 Inlet opening 78 Opening / closing valve mechanism 86 Bottom portion 88 Middle partition 90 First partition member 92 Second partition member 96 Open container type Net body filtration device F Waste liquid flow path C Partition chamber S Air gap

Claims (12)

It is a waste liquid treatment device after pretreatment including sand removal and rough floating solids removal,
An agglomerated precipitated particle recovery unit that recovers a liquid mainly containing agglomerated precipitated particles after the reaction while accelerating the agglutination reaction of the waste liquid to which the waste liquid contacted with the aggregating agent is continuously added;
A precipitation separation unit that introduces a liquid recovered in the aggregated precipitation particle recovery unit and precipitates and separates a component of the large specific gravity particles therein;
A discharge part for discharging treated fresh water after being separated in the precipitation separation part,
The agglomerated precipitated particle recovery part and the precipitation separation part are provided adjacent to each other in a division section partitioned so as to divide a tank body long in one direction into two along the longitudinal direction,
The agglomerated sediment particle collection unit has a suspended suspended material trapping mechanism that captures a liquid containing a large amount of suspended suspended solids in the waste liquid and continuously supplies a liquid containing a relatively large specific gravity particle component to the sediment separating unit. And
An apparatus for treating waste liquid, characterized in that an inversion introduction mechanism is provided on one end side of the aggregated sedimentation particle recovery section to reverse the flow of waste liquid from the aggregated sedimentation particle recovery section and introduce it into the precipitation separation section .   The waste liquid processing apparatus according to claim 1, wherein each of the agglomerated precipitated particle recovery unit and the precipitation separation unit includes an agglomerated sediment particle recovery tank and a precipitation separation tank that continuously receive and process the waste liquid to be processed. The suspended suspended solids capture mechanism includes a blocking wall structure including a blocking wall provided to block the flow of waste liquid charged into the agglomerated sediment particle collection tank,
The waste liquid treatment apparatus according to claim 2, further comprising: an outlet opening that is provided on a lower end side of the blocking wall and forms a part of the aggregated precipitated particle recovery unit. The reverse introduction mechanism is a rising pipe whose one end is connected to the outlet opening provided at the lower end of the blocking wall of the aggregated sediment recovery part and the other end is connected to the inlet opening at the upper position of the front wall of the precipitation separator. The waste liquid treatment apparatus according to claim 3, comprising: The waste liquid to be treated is continuously charged into the agglomerated sediment collection tank,
The liquid mainly containing the aggregated precipitated particles after the reaction has approximately the same liquid level in the aggregated precipitated particle recovery tank and the precipitation separation tank via the liquid pressure of the waste liquid charged to the aggregated precipitated particle recovery tank side. 5. The waste liquid treatment apparatus according to claim 4, wherein the riser is raised so as to be introduced into the precipitation separation tank through the inlet opening . The agglomerated sediment particle recovery unit is provided with a means for extending the flow of the waste liquid flow, and the precipitation separation unit is provided with a means for promoting the separation of the agglomerated sediment component and the large specific gravity particle component from the discharged fresh water. 6. The waste liquid treatment apparatus according to claim 1, wherein the waste liquid treatment apparatus is a waste liquid treatment apparatus. The waste liquid according to claim 6, wherein the means for promoting the separation of the large specific gravity particle component from the discharged fresh water in the sedimentation separation section includes a plurality of first partition members that flow in a manner in which the flow of the waste liquid flows over the upper end of the wall. Processing equipment. The means for promoting the separation of the large specific gravity particle component from the discharged fresh water in the sedimentation separation unit is a second method in which a lower opening is formed between the bottom of the flow path and the waste liquid flows through the lower opening so as to be submerged. 8. The waste liquid treatment apparatus according to claim 7, further comprising a partition member, wherein the first and second partition members are alternately arranged at a distance of the flow path. The waste liquid treatment apparatus according to any one of claims 1 to 8, wherein the precipitation separation unit is provided with a partition along the flow direction so as to re-invert the flow after inversion. The waste liquid treatment apparatus according to any one of claims 2 to 9, wherein the bottom surfaces of the aggregated precipitation particle recovery tank and / or the precipitation separation tank are provided so as to be inclined along the flow direction of the waste liquid. Communicating with the outlet opening provided in the coagulation sedimentation particle recovery unit, freely allowing the liquid containing mainly the coagulation sedimentation particles after reaction in the coagulation sedimentation particle recovery unit to be introduced to the precipitation separation unit side or discharged to the outside The waste liquid processing apparatus according to claim 1, further comprising an on-off valve mechanism for switching . A waste liquid treatment system comprising the waste liquid treatment apparatus according to claim 11,
An open container type net body filtration device that continuously receives and filters the liquid discharged by the on-off valve mechanism of the waste liquid treatment device and / or fresh water discharged from the precipitation separation unit is disposed adjacent to the waste liquid treatment device. A waste liquid treatment system characterized by

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