JP5755826B2 - Water pH adjusting method, pH adjusting device and pH adjusting system - Google Patents

Description

  The present invention relates to a water pH adjustment method, a pH adjustment device, and a pH adjustment system.

  The pH value of groundwater varies greatly depending on the surrounding environment. For this reason, groundwater enters each facility such as a factory during a large amount of rain, and the pH value of the drainage discharged from each facility may be outside the reference value. In order to solve such a problem, the present inventor has developed a new waste water treatment system using peat moss and has filed a patent application (see, for example, Patent Document 1).

  This waste water treatment system neutralizes waste water using humic acid contained in peat moss. Humic acid is soluble in alkali but difficult to dissolve in water. Therefore, humic acid can be dissolved to neutralize the wastewater according to the amount of calcium contained in the wastewater. Thereby, the waste water can be neutralized without using a complicated adjusting means.

JP 2010-119910 A

  Conventionally used wastewater pH adjusting devices measure the pH of wastewater with a pH meter, and add chemicals to the wastewater so as to obtain a predetermined pH. Such a pH adjusting device is a reliable method, but requires a meter, a chemical addition device, etc. in addition to chemicals. Furthermore, a power source for operating the instrument and the chemical addition device is also required.

  On the other hand, the wastewater treatment system described in Patent Document 1 is an excellent wastewater treatment system that can keep the pH value constant with a simple configuration. In the case of a wastewater treatment system that neutralizes wastewater using humic acid contained in peat moss, there are many excellent points such as being able to operate without supplying power, but humic acid contained in peat moss is Since it is usually about 20%, if all humic acid is eluted, the neutralization effect is lost and a large amount of waste is generated.

  An object of the present invention is to provide a water pH adjustment method, a pH adjustment device, and a pH adjustment system capable of efficiently adjusting the pH of water with a simple configuration using peat moss and without requiring any special operation. It is to be.

  The present invention relates to a method for adjusting the pH of water, comprising causing rot fungi to act on peat moss, generating humic acid, bringing the treated water into contact with the peat moss and adjusting the pH of the treated water with the humic acid. It is.

  In the method for adjusting the pH of water according to the present invention, the rot fungus is characterized by decomposing lignin and cellulose, which are main components of peat moss, to produce humic acid.

  In the water pH adjusting method of the present invention, the rot fungus is a white rot fungus.

  In the method for adjusting the pH of water according to the present invention, humic acid is produced by causing rot fungi to act on peat moss, and the pH of the water to be treated is adjusted using this humic acid. be able to. In this method, it is possible to target a wide range of water, and examples of water to be treated include drainage and drainage.

  This method utilizes the property that humic acid dissolves in alkali but hardly dissolves in water, and this method using peat moss as a neutralizing agent adjusts the pH of water to be treated as long as peat moss is present. It can be adjusted and the pH can be adjusted maintenance-free without requiring any special operation. Moreover, since peat moss itself is decomposed, 100% of peat moss can be used, which is very efficient. Peat moss itself is decomposed so that no waste is generated, or even if it is generated, it is a small amount, and in terms of generation of waste, it is more efficient than the conventional method using humic acid contained in the peat moss layer. It is.

  The method for adjusting the pH of water according to the present invention provides the water to be treated to the peat moss and makes the peat moss and the air in good contact with each other so that the peat moss is moist and aerobic. Is characterized by being placed in a well-growing, high-humidity, aerobic environment.

  According to the present invention, a high-humidity and aerobic environment in which rot fungi can grow well is created using treated water, which is very efficient and easy to maintain. is there.

  Further, the present invention is a pH adjusting device for carrying out the water pH adjusting method, the peat moss holding the rotting bacteria, a container capable of storing the peat moss in a wet and aerobic state, and the container And an environment forming means for bringing the contained peat moss into a moist and aerobic state.

  By using the water pH adjusting device of the present invention, the water pH adjusting method of the present invention can be carried out easily and reliably. In addition, the pH can be adjusted maintenance-free without requiring any special operation. The water pH adjusting device of the present invention has a simple device configuration and can be manufactured at low cost. In addition, the water pH adjusting device of the present invention basically has no moving parts, so there are few failures, and no power is required if water is supplied using the height difference.

  Further, in the water pH adjusting apparatus of the present invention, the environment forming means brings the water to be treated and the peat moss into contact with each other, and also makes the contact between the peat moss and the air favorable so that the rot fungus grows well. It is characterized by creating an aerobic environment.

  According to the present invention, a highly humid and aerobic environment in which rot fungi can grow well using treated water is very efficient.

  Further, in the water pH adjusting apparatus of the present invention, the environment forming means is installed in the container, the water to be treated is supplied to the container, and the water is not discharged until the inside of the container becomes full, the container When the inside becomes full, the water is discharged within a short time, and the peat moss is exposed to the atmosphere, and is a water discharging means, and the filling of the water into the container and the discharging of the water from the container are repeated, This makes the peat moss wet and aerobic.

  According to the present invention, a high humidity and aerobic environment in which rotting fungi can grow well can be created by utilizing the tidal flow caused by filling the container with water and discharging the water from the container. It is efficient.

  In the water pH adjusting apparatus of the present invention, the water discharging means is a siphon.

  By using a siphon as the water discharge means, it is possible to easily and surely realize the tide in the container and to create an environment in which the decaying bacteria can grow well. Moreover, the pH of water can be adjusted by using a siphon without supplying power from the outside.

  Further, in the water pH adjusting device of the present invention, the siphon is configured to follow the height of the peat moss whose top portion is decomposed by the decaying fungus and the filling height gradually decreases. Features.

  In the siphon used in the present invention, when peat moss is decomposed by decaying fungi and the filling height gradually decreases, the height of the top is reduced accordingly, so that the container is not unnecessarily filled with water, The peat moss is moist and aerobic, and the rot fungus can be grown well.

  In the water pH adjusting apparatus of the present invention, the environment forming means is spraying means for spraying the water to be treated from above on peat moss accommodated in the container.

  According to the present invention, since the water to be treated is sprayed to create a high humidity and aerobic environment where rotting bacteria can grow well, it is very efficient. Further, it can be realized inexpensively and easily.

  Moreover, in the water pH adjusting apparatus of the present invention, the environment forming means is a water retaining body having water permeability and air permeability disposed at the upper and lower portions of the peat moss, and the treated water is supplied to the upper water retaining body. It is supplied from above and flows down in the peat moss layer.

  According to the present invention, a water retaining body having water permeability and air permeability is used, and by supplying treated water to the water retaining body, a high humidity and aerobic environment in which decaying bacteria can grow well is created. So it is very efficient. Further, it can be realized inexpensively and easily.

  Further, in the water pH adjusting apparatus of the present invention, the environment forming means further ventilates the inside of the container to make it aerobic and / or sends air into the container to make the inside of the container aerobic. Air supply means is provided, and the inside of the container is ventilated and / or air is sent into the container to make the peat moss wet and aerobic.

  According to the present invention, since the inside of the container can be ventilated by the ventilation means and / or the air can be sent into the container by the air supply means, the peat moss can be surely made wet and aerobic. Rot fungi can grow well.

  Further, in the water pH adjusting device of the present invention, the peat moss is divided into a plurality of bags having air permeability and water permeability, and is stored in the container.

  According to the present invention, peat moss is accommodated in the container in a state of being divided into bags, so that a gap is formed between adjacent bags. This makes it easier for peat moss to come into contact with the air, and it is easy to create a high humidity and aerobic environment where rotting bacteria can grow well. Moreover, handling becomes easy.

  In the water pH adjusting apparatus of the present invention, the peat moss is filled in multiple stages in the container, and a space portion is provided between the stages.

  According to the present invention, the peat moss is filled in multiple stages in the container, and since the space is provided between the stages, the environment in a high humidity and aerobic state in which the decaying bacteria can grow well. Easy to produce.

  The present invention also returns the pH adjuster for the water, a pH meter for measuring the pH of the treated water discharged from the pH adjuster, and the treated water discharged from the pH adjuster to the pH adjuster. Based on the return line, the discharge line for discharging the treated water discharged from the pH adjusting device, and the pH of the treated water discharged from the pH adjusting device, the treated water is supplied to the return line and / or the discharged line. And a water pH adjustment system comprising a control means for supplying water.

  By using the pH adjustment system for water according to the present invention, the pH of water can be reliably adjusted.

  The pH adjustment method, pH adjustment apparatus, and pH adjustment system of the present invention can efficiently adjust the pH of water with a simple configuration. The water pH adjustment method of the present invention is a pH adjustment method for water using humic acid, and can be adjusted without maintenance and without any special operation. In addition, since peat moss itself is decomposed, no waste is generated or a small amount, even if generated, which is more efficient than the conventional method using humic acid contained in the peat moss layer. In addition, the water pH adjusting device and pH adjusting system of the present invention can adjust the pH of water without using external power, and the device configuration is simple and can be manufactured at low cost.

It is a schematic block diagram of the water pH adjustment apparatus 1 of 1st Embodiment of this invention. It is a flowchart which shows the pH adjustment method of the water of this invention. It is a modification of the pH adjustment apparatus 1 of the water of 1st Embodiment of this invention. It is a schematic block diagram of the pH adjustment apparatus 2 of the water of 2nd Embodiment of this invention. It is a schematic block diagram of the pH adjuster 3 of the water of 3rd Embodiment of this invention. It is a schematic block diagram of the pH adjuster 4 of the water of 4th Embodiment of this invention. It is a schematic block diagram of the pH adjustment system 10 using the water pH adjustment apparatus 1 of 1st Embodiment of this invention. It is a schematic block diagram of the pH adjuster 5 of the water of 5th Embodiment of this invention. It is a schematic block diagram of the pH adjuster 6 of the water of 6th Embodiment of this invention. It is a figure which shows the mode of the humic acid production | generation test by growth of the decaying fungi which used peat moss as a culture medium.

  FIG. 1 is a schematic configuration diagram of a water pH adjusting device 1 according to a first embodiment of the invention. Hereinafter, the case where treated water is wastewater will be described as an example. The same applies to the other embodiments. As shown in FIG. 2, in principle, the pH adjuster 1 causes a rot fungus (not shown) to act on the peat moss 15 to decompose lignin and cellulose which are the main components of the peat moss 15 to generate humic acid, Adjust the pH of the waste water with humic acid. Here, peat moss functions as a neutralizing agent.

  The pH adjusting device 1 includes a peat moss 15 that contains decaying fungi, a container 21 that can store the peat moss 15 in a wet and aerobic state, and a siphon for making the peat moss 15 stored in the container 21 wet and aerobic. 39. The siphon 39 is an environment forming unit that makes the peat moss 15 wet and aerobic. A treated water tank 49 for storing neutralized wastewater (treated water) discharged from the pH adjusting device 1 is provided below the pH adjusting device 1.

  The peat moss 15 is obtained by dewatering, pulverizing, and selecting humic peat on which plants such as sphagnum, reed, reed, sedge, and willow are accumulated. The peat moss 15 used here has decaying fungi. The rot fungus used here is not limited to a specific one as long as it decomposes lignin and cellulose which are the main components of peat moss 15 to generate humic acid. A white rot fungus can be mentioned as a rot fungus that decomposes lignin and cellulose to produce humic acid. Normally, peat moss 15 has a decaying fungus. However, if the peat moss 15 does not have a decaying fungus, the peat moss 15 may be separately added with an inoculum of the decaying fungus and cultured.

  In order to cause rot fungi (not shown) to act on the peat moss 15 to decompose lignin and cellulose which are the main components of the peat moss 15 to generate humic acid, it is important to create an environment where the rot fungi can grow well. If it is a white rot fungus, the white rot fungus can grow well by placing the peat moss 15 in a high humidity atmosphere. Specifically, an aerobic state in which the temperature is 20 to 40 ° C. and the relative humidity is 50 to 80% is preferable.

  The container 21 accommodates the peat moss 15, receives the waste water that is the water to be treated, makes the waste water and the peat moss 15 contact, and neutralizes the waste water. The container 21 is completely open on the upper surface and covered with a lid 33. The lid 33 is provided with an air hole 35 to maintain the inside of the container 21 in an aerobic state. A drainage inlet 37 for receiving drainage is provided at the top of the container 21, and a siphon 39 is installed at the bottom.

  The size of the air hole 35 is set so that the inside of the container 21 is in an environment in which rotting bacteria can easily grow. For example, when the humidity is too high, the change of air is promoted by lowering the humidity and the humidity is lowered. When the humidity is too low, the change of air is suppressed by lowering and the humidity is increased. Moreover, you may remove and use the lid | cover 33 as needed.

  The container 21 preferably has a shape having a low height and a wide area in plan view. By making the container 21 into such a shape, the thickness of the peat moss 15 to be filled is inevitably reduced, the contact area with air is increased, and the aerobic state can be maintained up to the inside of the peat moss 15.

  A filling portion 27 for filling the peat moss 15 is provided in the container 21. The filling portion 27 is provided at a slightly higher position from the container bottom surface 23 so that a space is formed between the filling portion 27 and the bottom portion of the container 21. Further, the filling portion side surface 31 on the drainage inlet 37 side is slightly separated from the container side surface 25 so that the drainage supplied from the drainage inlet 37 does not directly reach the peat moss 15.

  The filling part 27 is formed of a net capable of holding the peat moss 15 and allowing water and air to pass freely. In addition, the member which forms the filling part 27 should just be a member which can hold | maintain the peat moss 15, and can pass water and air freely, A cloth, a porous board, etc. can be used besides a net | network.

  The siphon 39 is a water discharge unit that intermittently discharges the water in the container 21, and is also a unit for making the peat moss 15 wet and aerobic. The mechanism by which the siphon 39 makes the peat moss 15 wet and aerobic will be described later. The siphon 39 discharges the accumulated water at once when the container 21 is full of water. In the present embodiment, the full water is a water level slightly higher than the upper surface 16 of the peat moss 15. For this reason, when the inside of the container 21 is full, the peat moss 15 is completely submerged. The full water level H1 is preferably as low as possible if the peat moss 15 is a water level that is completely buried in water in a full water state.

  The siphon 39 is attached to the end of the container 21 that faces the drainage inlet 37. The inlet 41 of the siphon 39 is located in the vicinity of the bottom surface 23 of the container 21, and this position is between the filling portion bottom surface 29 and the container bottom surface 23, and the discharge port 43 of the siphon 39 is provided at a position lower than the container bottom surface 23. It has been. The siphon 39 itself is the same as a siphon that has been generally used.

  An apparatus having a function equivalent to that of the siphon 39 includes a drainage apparatus including a drain pipe provided with a valve, a water level detector, and a control device that opens and closes a valve installed in the drain pipe according to the water level. However, since the drainage device using a water level detector or the like has many components and requires a power source, the siphon 39 is easier to use.

  The usage method and operation | movement of the pH adjustment apparatus 1 are demonstrated. In addition, the waste_water | drain supplied here is an alkaline waste_water | drain.

  The peat moss 15 holding the rot fungus is filled in the filling portion 27 in the container 21. The inside of the container 21 is a high humidity and aerobic environment where the peat moss 15 is maintained in a moist and aerobic state by the action of the siphon 39, and the spoilage fungus grows well. Decomposes components lignin and cellulose to produce humic acid.

  The drainage is supplied into the container 21 from a drainage inlet 37 provided at the upper part of the container 21 on the side opposite to the siphon 39. At this time, the waste water falls onto the water surface 45 and entrains air. When the water level rises and the waste water comes into contact with the peat moss 15, humic acid has a characteristic that it easily dissolves in alkali, so that the humic acid dissolves in the waste water and the waste water is neutralized. When the water level in the container 21 further rises and becomes full water H1, the siphon 39 operates and the water in the container 21 is discharged at once. When the water in the container 21 is discharged, the water is stored in the container 21 again until it is full.

  As described above, the pH adjusting device 1 neutralizes the waste water while the water repeats tidal in the container 21. When all the water in the container 21 is discharged, the peat moss 15 is completely exposed to the atmosphere (air). Until the water level reaches the height of the bottom surface 17 of the peat moss 15, the peat moss 15 remains exposed to the atmosphere and sufficiently contacts the air. When the water level further rises, the water is gradually immersed in the drainage from the lower part of the peat moss 15, but since the wastewater is supplied while entraining air, the part immersed in the wastewater is not completely anaerobic.

  Since water repeats tidal in the container 21, the peat moss 15 can maintain a wet state and come into contact with fresh air. In particular, by reducing the height of the container 21, the peat moss 15 can easily come into contact with air. By these, it is possible to easily create an aerobic state of high humidity, which is an environment in which rot fungi can grow well.

  As described above, the pH adjusting device 1 can neutralize wastewater without using complicated adjusting means and without requiring a special operation. Since humic acid is easily dissolved in alkaline wastewater, the pH of the wastewater can be adjusted efficiently. About these points, it is the same also with the below-mentioned pH adjustment apparatus. Further, the pH adjusting device 1 shown in FIG. 1 has a simple structure, has no moving parts, and does not need to supply power from the outside, and can be manufactured at a low cost.

  In the said embodiment, although waste_water | drain was to-be-processed water, it cannot be overemphasized that pH of waste_water | drain, waste_water | drain, and waste_water | drain can be adjusted other than waste_water | drain. This is the same in other embodiments described below.

  The drainage pH adjusting device 1 of the first embodiment can be used with various modifications. In the pH adjusting device 1 of FIG. 1, the example in which the filling unit 27 is provided so that the wastewater supplied to the container 21 does not directly reach the peat moss 15 is shown. However, the wastewater may be supplied directly onto the peat moss 15. Good. In this case, it is preferable to place a perforated plate on the upper surface of the peat moss 15 and supply the waste water thereon, for example, so that the waste water reaches the entire peat moss 15 instead of supplying it to one place.

  Moreover, as a modification of the pH adjusting device 1 of the waste water of the first embodiment, the peat moss 15 may be divided into small portions as shown in FIG. As the bag 51, a cloth, a nonwoven fabric, a mesh bag, or the like having good air permeability can be used. The number of bags may be appropriately determined according to the size of the container 21 and the filling amount of the peat moss 15 and may be two or more. In this method, the filling efficiency is somewhat reduced, but conversely, a gap is formed between the adjacent bags 51, so that the peat moss 15 is more likely to come into contact with air. Although the example which distributes and supplies waste_water | drain is shown in FIG. 3, you may supply waste_water | drain so that it may not be applied to peat moss 15 like the pH adjustment apparatus 1 of FIG.

  FIG. 4 is a schematic configuration diagram of the wastewater pH adjusting device 2 according to the second embodiment of the present invention. The same components as those of the pH adjusting device 1 shown in FIGS. 1 to 3 are denoted by the same reference numerals and the description thereof is omitted. Hereinafter, differences from the pH adjusting device 1 will be mainly described.

  The pH adjuster 2 has the same basic configuration as the pH adjuster 1, but is filled with peat moss 15 in multiple stages. The bottom surface 29a, 29b, 29c of each stage of the filling unit 27 is provided with a net, and the peat moss 15 is filled thereon, similarly to the pH adjusting device 1 of the waste water of the first embodiment. By filling the peat moss 15 in multiple stages, the height of the peat moss 15 at each stage is low, and a space 53 is formed between the upper and lower stages, making the peat moss 15 at each stage more aerobic.

  In the pH adjusting device 2 shown in FIG. 4, an example in which the peat moss 15 is filled in three stages is shown, but the number of filling stages is not limited to a specific number, and the size and depth of the container 21 and the filling of the peat moss 15 are not limited. It can be determined appropriately according to the amount. When the filling amount of the peat moss 15 is large, it is preferable to increase the number of stages and reduce the filling height of the peat moss 15 per stage. The size of the space 53 formed between the upper and lower tiers only needs to be large enough to allow air to be exchanged, and even if it is unnecessarily large, only the volumetric efficiency is reduced.

  In the pH adjusting device 2 shown in FIG. 4, the peat moss 15 may be divided into small portions as shown in FIG.

  FIG. 5 is a schematic configuration diagram of the pH adjustment device 3 for wastewater according to the third embodiment of the present invention. The same components as those of the pH adjusting devices 1 and 2 shown in FIGS. 1 to 4 are denoted by the same reference numerals and description thereof is omitted. Hereinafter, differences from the pH adjusting devices 1 and 2 will be described.

  The pH adjusting device 3 has the same basic configuration as the pH adjusting device 1, but in order to make contact with air more reliably at the bottom of the peat moss 15, a conducting tube (venting tube) that connects the upper and lower portions of the peat moss 15 to each other. ) 55. If necessary, a fan may be provided in the middle of the conducting tube 55 or in the gas phase portion 57 in the container 21 to forcibly ventilate the inside of the container 21 or send in air. This makes it easier to maintain the peat moss 15 at high humidity and in an aerobic state. The installation of the conduction pipe (venting pipe) 55 and the installation of the fan in the gas phase part 57 are also effective in the pH adjusting apparatus 1 shown in FIG. 3 and the pH adjusting apparatus 2 shown in FIG.

  FIG. 6 is a schematic configuration diagram of the wastewater pH adjusting device 4 according to the fourth embodiment of the present invention. The same reference numerals are given to the same components as those of the pH adjusting devices 1, 2, and 3 shown in FIGS. 1 to 5, and the description thereof will be omitted. Hereinafter, the points different from the pH adjusting devices 1, 2, and 3 will be mainly described. explain.

  The pH adjusting device 4 has the same basic configuration as the pH adjusting device 1, but is characterized in that the height of the top 61 of the siphon 59 can be varied. Since the peat moss 15 is decomposed by the decaying fungi, it decreases with time. Accordingly, the height of the peat moss 15 gradually decreases. If the position of the top 61 of the siphon 59 is fixed, even if the height of the peat moss 11 is lowered, the water is not discharged unless it reaches the initially set level H1, and the time during which the peat moss 15 is submerged in the water is long. Become.

  In the pH adjusting device 4, regardless of the height of the peat moss 15, the height of the top 61 of the siphon 59 is set to the height of the peat moss 15 so that the water can be discharged immediately when the peat moss 15 is completely immersed in water. Follow. Specifically, a flexible pipe is installed in an inverted U shape, and this is used as a siphon 59. At the same time, a perforated plate 62 that supports the top 61 of the inverted U-shaped pipe is attached, and this perforated plate 62 is placed on the upper surface 16 of the peat moss 15. As the perforated plate 62, a material having water permeability and air permeability is used, and a light one is preferable as long as it does not float on water. Thereby, even if the height of the peat moss 15 is lowered with use, the height of the top 61 of the siphon 59 can be made to follow the height of the peat moss 15. Such a pH adjusting device 4 is easy to maintain the peat moss 15 in a high humidity and aerobic state.

  FIG. 7 is a schematic configuration diagram of a pH adjustment system 10 using the pH adjustment device 1 for wastewater according to the first embodiment of the present invention. The pH adjustment system 10 includes a pH meter 63 that measures the pH of waste water (treated water) in the treated water tank 49, a pH controller 65, a water pump 67, and a return line that returns treated water in the treated water tank 49 to the container 21. 69. It has a discharge line 71 for discharging treated water. The return line 69 and the discharge line 71 are connected via a three-way valve 73, and the three-way valve 73 is operated by a signal from the pH controller 65.

  In the present pH adjustment system 10, the treated water in the treated water tank 49 is measured by the pH meter 63, and if this value does not satisfy the reference value, the three-way valve 73 is connected to the return line 69 side to return the treated water to the container 21. Communicate with. On the other hand, when the value measured by the pH meter 63 satisfies the reference value, the three-way valve 73 is connected to the discharge line 71 side to discharge.

  Such a pH adjustment system 10 is used when the alkalinity of the supplied wastewater is higher than the generation rate of humic acid, such as when the pH of the supplied wastewater is high or when the flow rate of the supplied wastewater is large. It can be preferably used. In the pH adjusting system 10 shown in FIG. 7, the pH adjusting device 1 is used. However, instead of the pH adjusting device 1, the pH adjusting device 2, the pH adjusting device 3, and the pH adjusting device 4 may be used. It is natural. The installation point of the return line 69 and the discharge line 71 is not limited to the point of this embodiment.

  FIG. 8 is a schematic configuration diagram of the pH adjusting device 5 for wastewater according to the fifth embodiment of the present invention. The same components as those of the pH adjusting devices 1, 2, 3, 4 and the pH adjusting system 10 shown in FIG. 1 to FIG.

  The pH adjusting device 5 has a container 21 for storing peat moss 15 having the same decaying fungi as the pH adjusting device 1, and stores the peat moss 15 in the container 21 so that the drainage and the peat moss 15 are brought into contact with each other. To neutralize. In the pH adjuster 1, the drainage tidal is formed in the container 21 using the siphon 39, thereby making the peat moss 15 in a high humidity and aerobic state. A high-humidity aerobic state is created by spraying waste water and improving the ventilation of the container 21. In the present embodiment, the spray nozzle 75 for spraying waste water and the ventilation means for ventilating the inside of the container 21 are the environment forming means.

  The filling portion 27 is provided on the entire cross section of the container 21, and a net is attached only to the bottom surface 29. In addition, the filling unit 27 is provided at a slightly higher position from the container bottom surface 23 so that a space is formed between the filling unit 27 and the container bottom surface 23 similarly to the pH adjusting device 1.

  The drainage is sprayed onto the peat moss 15 through a spray nozzle 75 installed above the peat moss 15. In the pH adjusting device 5, since the inside of the container 21 needs to be in a high humidity and aerobic state, a two-fluid nozzle capable of refining the wastewater with compressed air can be suitably used as the spray nozzle 75. However, it is also possible to use a one-fluid nozzle that pressurizes only the liquid and sprays it as the spray nozzle.

  A drain pipe 77 is installed at the bottom of the container 21, and waste water supplied through the spray nozzle 75 is sent to the treated water tank 49 through the drain pipe 77. Note that the drain pipe 77 is located at a position where the upper end 79 is slightly lifted from the container bottom surface 23 so that a small amount of treated water accumulates at the bottom of the container 21.

  In addition, a vent 81 for taking in air is provided at the bottom of the container 21, specifically, between the filling portion bottom surface 29 and the upper end 79 of the drain pipe. Since the container 21 is provided with the vent hole 81 and the air hole 35, the inside of the container 21 can be naturally ventilated. Note that air may be forcedly sent from the vent 81 using a blower (not shown).

  Further, the pH adjusting device 5 is provided with a return line 69 for neutralizing the treated water in contact with the peat moss 15 again with the peat moss 15. The return line 69 is provided with a water pump 67, and the treated water in the treated water tank 49 is pumped up by the water pump 67 and sent to the spray nozzle 75. The spray nozzle 75 is shared with the spray nozzle 75 that sprays waste water sent from the waste water supply device, and the return line 69 is connected to the waste water supply pipe 47.

  The usage method and operation of the pH adjusting device 5 will be described. In addition, the waste_water | drain supplied from a waste_water | drain supply apparatus here is alkaline waste_water | drain.

  The peat moss 15 holding the rot fungus is filled in the filling portion 27 in the container 21. In the container 21, the peat moss 15 is maintained in a moist and aerobic state by the spray nozzle 75 and the ventilation means, and is in a high humidity and aerobic environment where the rot fungus grows well. The lignin and cellulose which are 15 main components are decomposed to produce humic acid.

  The waste water sprayed from above the peat moss 15 through the spray nozzle 75 is neutralized by humic acid in the process of flowing down the peat moss 15 layer, and is discharged to the treated water tank 49 through the drain pipe 77. A part of the treated water in the treated water tank 49 is sent to the spray nozzle 75 through the return line 69 and is neutralized with humic acid again in the process of flowing down the peat moss 15 layer.

  As described above, since the drainage and the treated water are sprayed from above the container 21 and the inside of the container 21 is ventilated, the peat moss 15 maintains a wet state and comes into contact with new air. Can do. By these, it is possible to easily create an aerobic state of high humidity, which is an environment in which rot fungi can grow well. The pH adjusting device 5 requires a spray nozzle 75 for spraying waste water and a device for pressurizing the waste water as compared with the pH adjusting device 1. However, even if the height of the peat moss 15 is lowered, the humidity is aerobic. The situation can be easily created.

  In the pH adjusting device 5, if a two-fluid type spray nozzle using compressed air is used as the spray nozzle 75, air is mixed into the sprayed waste water and treated water, and the peat moss 15 is easily maintained in an aerobic state. Furthermore, if air is forcibly sent from the vent 81, the peat moss 15 can be easily maintained in an aerobic state.

  Similarly to the pH adjusting device 1, the pH adjusting device 5 can be used with various modifications. The pH adjusting device 5 shown in FIG. 8 includes a return line 69 and performs a circulation operation in which treated water in the treated water tank 49 is brought into contact with the peat moss 15 again. However, the alkalinity of the supplied wastewater is low, and the peat moss 15 layers are provided. If the wastewater can be brought to a predetermined pH by passing the water once, the return line 69 need not be provided. Similarly to the pH adjustment system 10 shown in FIG. 7, the pH of the treated water is measured and returned to the container 21 only when the pH does not reach the reference value. When the pH reaches the reference value, the discharged water is discharged. You may make it do.

  Further, in the pH adjusting device 5, as in the pH adjusting device 1 shown in FIG. 3, the peat moss 15 may be filled in a bag. Furthermore, like the pH adjusting device 2 shown in FIG. 4, the container 21 may be filled with peat moss 15 in multiple stages.

  FIG. 9 is a schematic configuration diagram of the wastewater pH adjusting device 6 according to the sixth embodiment of the present invention. The same components as those of the pH adjusters 1, 2, 3, 4, 5 and the waste water treatment system 10 shown in FIGS. 1 to 8 are denoted by the same reference numerals and description thereof is omitted.

  The pH adjusting device 6 has a container 21 for storing peat moss 15 having the same rot fungus as that of the pH adjusting device 1. The peat moss 15 is stored in the container 21, and the drainage and the peat moss 15 are brought into contact with each other. To neutralize. In the pH adjusting device 1, the siphon 39 is used to form drainage in the container 21, thereby making the peat moss 15 in a high humidity and aerobic state. In the pH adjusting device 6, the peat moss 15 is moved up and down. A high humidity and aerobic state is created by sandwiching between the porous materials 83 and 85 and improving the ventilation of the container 21. In the present embodiment, the porous members 83 and 85 disposed above and below the peat moss 15 and the ventilation means for ventilating the inside of the container 21 are the environment forming means.

  The filling unit 27 is provided on the entire cross section of the container 21 as in the pH adjusting device 5, and a net is attached only to the bottom surface 29. The filling unit 27 is provided at a slightly higher position from the container bottom surface 23 so that a space is formed between the container bottom surface 23 and the pH adjusting device 1, and the space portion is filled with the space portion. Is filled with a porous material 83.

  A porous material 85 is placed on the upper surface 16 of the peat moss. The porous material 85 placed on the upper surface 16 of the peat moss and the porous material 83 filled below the filling portion 27 are both made of a material having excellent water retention, water permeability and air permeability, and a water retention layer (water retention body). Function as. Examples of the porous materials 83 and 85 include porous bodies made of synthetic resin sponge, ceramic, zeolite, and the like. The porous materials 83 and 85 are preferably light within a range that does not float on water.

  The porous materials 83 and 85 may be a single plate-like member or may be filled with a granular or massive member. Since the porous material 85 is only placed on the upper surface 16 of the peat moss 15, when the peat moss 15 is decomposed by the decaying bacteria and the height is reduced, the porous material 85 also moves following it. In the case where the granular porous material 83 is filled below the filling portion 27, when there is a possibility of flowing out through the drain pipe 77, measures such as covering the drain pipe 77 with a net are required.

  The porous material 85 may be fixed in the container 21 so that the peat moss 15 does not move even if the peat moss 15 is decomposed by decaying fungi and the height is reduced. In this case, the wastewater is dispersed by the porous material 85 to be showered and supplied to the peat moss 15.

  The drain pipe 77 is mounted at a position where the upper end 79 of the drain pipe is slightly lifted from the bottom face 23 of the container so that a small amount of treated water is collected at the bottom of the container 21 as in the pH adjusting device 5 for drainage of the fifth embodiment. It has become a position. Further, similarly to the drainage pH adjusting device 5 of the fifth embodiment, a vent hole 81 is provided at the lower portion of the container 21 so that the inside 21 of the container can be naturally ventilated and forcedly ventilated.

  The usage method and operation of the pH adjusting device 6 will be described. In addition, the waste_water | drain supplied from a waste_water | drain supply apparatus here is alkaline waste_water | drain.

  The peat moss 15 holding the rot fungus is filled in the filling portion 27 in the container 21. The inside of the container 21 has high humidity where the peat moss 15 is maintained in a moist and aerobic state by the porous materials 83 and 85 disposed above and below the peat moss 15 and the ventilation means for ventilating the inside of the container 21 so that the rot fungus grows well. Since the environment is aerobic, the rot fungus decomposes lignin and cellulose, which are the main components of peat moss 15, to generate humic acid.

  Waste water supplied from above the peat moss 15 is dispersed by the porous material 85, passes through the porous plate 85, and is supplied to the peat moss 15. The wastewater that has reached the peat moss 15 is neutralized by humic acid in the process of flowing down the peat moss 15 layer, passes through the porous material 83, and is discharged to the treated water tank 49 through the drain pipe 77. The inside of the container 21 is ventilated through the vent 81 and the air hole 35, and the porous materials 83 and 85 have air permeability, so that the peat moss 15 can maintain a wet state and come into contact with fresh air. By these, it is possible to easily create an aerobic state of high humidity, which is an environment in which rot fungi can grow well.

  The pH adjusting device 6 is highly reliable because it has a very simple device configuration and no moving parts. In addition, since it is not necessary to supply power from the outside, the place of use is not limited and can be used widely.

  In the pH adjusting device 6, if air is forcibly sent from the vent 81, the peat moss 15 can be easily maintained in an aerobic state. Further, like the pH adjusting device 1, it can be used with various modifications. For example, the peat moss 15 may be filled in a bag as in the pH adjusting device 1 shown in FIG. Furthermore, like the pH adjusting device 2 shown in FIG. 4, the container 21 may be filled with peat moss 15 in multiple stages. Moreover, you may construct | assemble the waste water treatment system similar to the waste water treatment system shown in FIG. Further, similarly to the pH adjusting device 5, the treated water may be circulated.

  As described above, various forms of pH adjusting devices and wastewater treatment systems incorporating the pH adjusting devices have been shown. However, the pH adjusting device is not limited to the above embodiment, and peat moss is in a wet and aerobic state. Any other form may be used as long as it can create a high humidity and aerobic environment in which rotting bacteria can grow well, decompose peat moss and produce humic acid by rotting bacteria.

  The preferred pH adjusting device and wastewater treatment system and the wastewater pH adjusting method have been described with reference to the drawings. However, those skilled in the art will understand various changes and modifications within the obvious range by referring to the present specification. Would be easily assumed. Therefore, such changes and modifications are interpreted as being within the scope of the invention defined by the claims.

A humic acid production test by the growth of decaying fungi using peat moss as a medium was performed as follows.
Canadian pomoth (humic acid content: 12 to 14%) was used as peat moss, and Himalaya hiratake No. 1 (manufactured by Kinox Co., Ltd.) was used as the decaying fungus (inoculum).

  Adjustment of peat moss: Humic acid contained in peat moss was removed as follows to confirm the formation of humic acid. 25 g of peat moss was immersed in 1 L of a 0.1% NaOH solution for 2 days to completely elute humic acid. Thereafter, it was washed with water until the pH of the washing solution became 9 or less. Finally, it was confirmed that the pH of the washing water was 8.6.

  Peat moss from which humic acid had been removed as described above was thinly spread over a flask (made of glass) and sterilized in an autoclave. Thereafter, about 0.5 mL of inoculum was added to peat moss, the water content was adjusted with sterilized water, and cultured in a thermostatic bath at 25 ° C. for 5 days.

  As a result of the test, as shown in FIG. 10, on the fifth day, the decaying fungus covered the whole white, and it was confirmed that the decaying fungus rapidly propagated. When the pH of the medium cultured for 5 days was measured, the pH was 5.4, and the production of humic acid was confirmed.

1, 2, 3, 4, 5, 6 pH adjusting device 10 pH adjusting system 15 Pete moss 21 Container 27 Filling portion 35 Air hole 39 Siphon 51 Bag 53 Space portion 55 Conducting tube 57 Gas phase portion 59 Siphon 61 Siphon top portion 62 Porous Plate 63 pH meter 65 pH controller 67 Water pump 69 Return line 71 Discharge line 73 Three-way valve 75 Spray nozzle 81 Vent 83, 85 Porous material

Claims (15)

  A method for adjusting the pH of water, comprising causing rot fungi to act on peat moss, generating humic acid, bringing the water to be treated into contact with the peat moss and adjusting the pH of the water to be treated with the humic acid.   The method for adjusting the pH of water according to claim 1, wherein the rot fungus decomposes lignin and cellulose, which are main components of peat moss, to generate humic acid.   The method for adjusting the pH of water according to claim 1 or 2, wherein the rot fungus is a white rot fungus.   By supplying water to be treated to the peat moss and making good contact between the peat moss and the air, the peat moss is moist and aerobic. The method for adjusting the pH of water according to any one of claims 1 to 3, wherein the pH adjustment method is placed in an environment of a gas state. A pH adjusting device for carrying out the water pH adjusting method according to any one of claims 1 to 4,
Peat moss holding the rot fungus,
A container capable of storing the peat moss in a wet and aerobic state;
An environment forming means for making the peat moss contained in the container wet and aerobic;
An apparatus for adjusting the pH of water.   The environment forming means brings the water to be treated into contact with the peat moss and makes good contact between the peat moss and air, thereby creating a high humidity and aerobic environment in which the spoilage bacteria grow well. The water pH adjusting device according to claim 5. The environment forming means is installed in the container, does not discharge the water until the water to be treated is supplied to the container and the inside of the container is full, and when the inside of the container is full, the water is stored in a short time. Is a water discharge means for discharging the peat moss to the atmosphere,
7. The water pH adjusting device according to claim 6, wherein tidal and continuous filling is repeated by filling the container with water and discharging the water from the container, thereby making the peat moss wet and aerobic.   The water pH adjusting device according to claim 7, wherein the water discharging means is a siphon.   9. The water according to claim 8, wherein the siphon is configured to follow the height of the peat moss whose top portion is decomposed by the rotting bacteria and the filling height gradually decreases. pH adjuster.   The water pH adjusting apparatus according to claim 6, wherein the environment forming unit is a spray unit that sprays the water to be treated from above on peat moss accommodated in the container.   The environment forming means is a water retaining body having water permeability and air permeability disposed at an upper part and a lower part of the peat moss, and the treated water is supplied from above the upper water retaining body and flows down in the layer of the peat moss. The water pH adjusting device according to claim 6, wherein:   The environment forming means further includes a ventilation means for ventilating the inside of the container to bring it into an aerobic state and / or an air feeding means for sending air into the container to bring the inside of the container into an aerobic state, and ventilates the inside of the container. 12. The water pH adjusting device according to claim 7, wherein air is sent into the container and / or the peat moss is moistened and aerobic.   The pH of water according to any one of claims 5 to 12, wherein the peat moss is divided into a plurality of bags having air permeability and water permeability, and is stored in the container. Adjustment device.   The water pH adjusting device according to any one of claims 5 to 13, wherein the peat moss is filled in multiple stages in the container, and a space is provided between the stages. The water pH adjuster according to any one of claims 5 to 14,
A pH meter for measuring the pH of the treated water discharged from the pH adjusting device;
A return line for returning treated water discharged from the pH adjuster to the pH adjuster;
A discharge line for discharging treated water discharged from the pH adjusting device;
Control means for feeding the treated water to the return line and / or the discharge line based on the pH of the treated water discharged from the pH adjusting device;
A water pH adjustment system comprising:

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