JPH0510960Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a disinfection device for septic tanks.

[Conventional technology]

The third method for sterilizing wastewater from a septic tank is
As shown in the figure, a cartridge with a water passage hole formed at the lower end of the side wall is filled with a solid drug and placed in the flow path of the disinfection chamber, and an oxidation tank is placed between the precipitation chamber and the disinfection chamber. There is a partition wall at approximately the same height as the highest water level, and the wastewater that overflows from the partition wall into the disinfection chamber comes into contact with the solid medicine inside the cartridge.

In such a process, when the flow rate of treated water changes, a method of changing the immersion depth of the cartridge into the treated water is used as a means of dissolving the solid drug in the treated water at a predetermined ratio. (Japanese Utility Model Publication No. 50-5603, Japanese Utility Model Publication No. 60-34341), a method of changing the opening degree of the water passage hole in the cartridge (Publication of Utility Model Publication No. 50-5603, Publication No. 60-34341), a method of changing the opening degree of the water passage hole in the cartridge (Publication of Utility Model Publication No. 50-5603, Publication No. 60-34341), a method of placing multiple cartridges in the flow path of treated water according to the flow rate. Method of providing (Special Publication No. 51-18395, Utility Model Application Publication No. 60-95929)
Alternatively, a method is known in which an opening/closing plate called a gate or damper is provided in the flow path of treated water to adjust the flow rate.

[The problem that the idea aims to solve]

However, conventionally known devices for dissolving solid drugs do not necessarily dissolve the drugs proportionally as the amount of water to be treated changes, especially when the amount of water changes greatly, such as when draining human waste from a septic tank. The reality is that there is a significant imbalance in the amount of drug dissolved, and accurate drug treatment is not carried out.

[Means to solve the problem]

In view of these circumstances, the inventor of the present invention has repeatedly studied a septic tank disinfection device that always dissolves chemicals in the treated water at a nearly constant ratio even if the amount of sewage changes. In a septic tank that is equipped with a chamber and a disinfection chamber, and in which wastewater overflowing from the settling chamber comes into contact with a chemical in the disinfection chamber, a partition wall between the settling chamber and the disinfection chamber is protruded to a position higher than the highest water level of the oxidation tank, and the oxidation in the partition wall is The intended purpose was achieved by drilling holes at a location equal to or lower than the highest water level of the layer.

Although various shapes are possible for the hole in this proposal, a circular one is optimal, and its diameter should vary depending on the scale of the septic tank.For example, it should be approximately 5 mm for a tank for 5 people, and approximately 5 mm for a tank for 50 people. It is desirable that the size be approximately 16 mm.

In implementing this proposal, if the septic tank becomes large-scale, multiple holes should be provided in the partition wall, and the sewage discharged from each hole should be individually guided to each drug dissolver for treatment.

The drug dissolver suitable for carrying out this proposal may be of any type, but the cartridge has a water passage hole formed in the lower end of the side wall and has a hardener such as chloroisocyanuric acid and its salts or calcium hypochlorite. It is generally filled with molded chlorine tablets.

[Effect]

According to this idea, the partition wall between the precipitation chamber and the disinfection chamber is made to protrude above the highest water level of the oxidation tank, and a through hole is bored in the partition wall at a position equal to or lower than the highest water level of the oxidation tank. Therefore, when the amount of wastewater from the septic tank increases, the water level in the settling chamber will rise, but the phenomenon of overflowing wastewater from the partition wall will be suppressed, and the wastewater will be discharged from the through hole formed to a predetermined diameter, so that the water level in the settling chamber will increase. The amount of wastewater that reaches this point is approximately constant, and because this limited amount of wastewater comes into contact with the solid chlorine tablets in the drug dissolver, variations in the concentration of drugs contained in the treated wastewater are significantly reduced.

〔Example〕

The drawing shows an example of the proposed device, which is a septic tank that is equipped with an oxidation tank 1, a precipitation chamber 2, and a disinfection chamber 3, and in which sewage overflowing from the precipitation chamber 2 is brought into contact with a chemical in the disinfection chamber 3. A partition wall 4 between the sterilization chamber 3 and the oxidation tank 1 is made to protrude to a position higher than the highest water level of the oxidation tank 1, and a through hole 5 is bored in the partition wall 4 at a position equal to or lower than the highest water level of the oxidation tank 1. be.

Reference numeral 6 indicates a drug dissolver, in which tablets of trichloroisocyanuric acid are filled into a cartridge 8 having water passage holes 7, 7, . be.

In the figure, 10 represents a septic tank.

[Effect of idea]

According to this invention, it is possible to always dissolve a predetermined amount of chemicals in the waste water of the septic tank to perform accurate sterilization and disinfection, and the partition wall 4 between the settling chamber 2 and the disinfection chamber 3 is set at a level higher than the highest water level of the oxidation tank 1. Because the septic tank 10 is protruded from the oxidation tank 1, the flow rate of the sewage overflowing from the septic tank 10 to the oxidation tank 1 is slowed down, and the rolling up of sludge flowing from the septic tank 10 into the oxidation tank 1 is suppressed, thereby significantly reducing the generation of odors. The practical effects are great, such as reducing the amount of waste water, increasing the purification effect in the oxidation tank, and reducing the SS and BOD concentrations in wastewater.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing an example of the proposed device;
The same figure is an enlarged perspective view showing the main parts, and Fig. 3 is a perspective view showing the main parts of a conventional sterilization device, in which 1 is an oxidation tank, 2 is a precipitation chamber, 3 is a disinfection chamber, 4 is a partition wall, 5
6 represents a through hole, and 6 represents a drug dissolver.

Claims (1)

[Scope of utility model registration request] In a septic tank that includes an oxidation tank, a precipitation chamber, and a disinfection chamber, and in which overflow water from the precipitation chamber comes into contact with a chemical agent in the disinfection chamber, a partition wall between the precipitation chamber and the disinfection chamber is protruded to a position higher than the highest water level of the oxidation tank, and the partition wall A disinfection device for a septic tank, characterized in that a through hole is bored at a position equal to or lower than the highest water level of an oxidation tank.