JP2000170227A - Undraining type flush toilet system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a function by treating a treating object from a flush toilet bowl by an aeration tank, a salinity treating tank and an ozone sterilization treating tank, and resupplying treated water to the flush toilet bowl. SOLUTION: An anaerobic precipitation tank 2 has a return piping 21 for supplying aeration-treated water B, C to anaerobically treat toilet distribution water (a) and the aeration-treated water (b) (B, C). Next, the treated water A is sent to a first aeration tank 3 and a second aeration tank 4 by an overflow to be aerobically treated by receiving aeration supply from a blow 31. Next, a salinity treating tank part 5 reduces salinity of the aeration-treated water C from the tank 4 by a halophilic microorganism. A sterilization treating part 6 is provided with an ozone generator 61 to supply ozone G from a lower opening part of spiral piping 63 arranged in a treating tank 62 to be sterilized. Treated circulating water E treated by the treating part 6 is supplied as toilet water by a pump 71 and piping 72 of a water supply part 7. Thus, since, an increase in the salinity concentration can be prevented, an undraining type flush toilet system can be put to practical use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-drainable flush toilet system for treating waste water from flush toilets and performing a circulation treatment of reusing the treated water for flush toilets again.

[0002]

2. Description of the Related Art A flush toilet system of a non-drainage circulation type which reuses treated water of toilet wastewater is known. Its basic structure is as described in Japanese Patent Application Laid-Open No. 5-230858, in which the decomposition of dirt by microorganisms in a contact aeration tank, the sterilization treatment after the decomposition treatment, and the reuse of the treated water for flush toilets are repeated. Things.

[0003]

In the above-mentioned treatment system, improvement of the contact filter medium and prolongation of the treatment period have been proposed in order to increase the efficiency of decomposing wastes. In such a case, the salt concentration in the circulating treatment water naturally increases, and the metal members such as pipes are immediately corroded.
Long-term circulation treatment is difficult.

In sterilization, even if ozone gas is simply mixed into the water to be treated, a large amount of ozone gas must be supplied in order to perform sufficient sterilization, and a sterilization reaction (oxidation reaction) is also required. Surplus ozone not used for
Since it is inconvenient to release the gas to the atmosphere as it is, equipment such as a filter is required at the location where the air is released.

Therefore, the present invention proposes a means for solving the problem of salt treatment and an efficient sterilization treatment using ozone.

[0006]

A non-drainable flush toilet system according to the present invention comprises a flush toilet, an aeration tank section for receiving an object to be treated from the flush toilet and performing aerobic treatment, and using aeration-treated water for salt-washing. A salt treatment tank for reducing the salt concentration of the treated water circulated by the bacterium, a sterilization treatment tank for performing ozone sterilization of the salt-treated circulating water, and a service water supply unit having a supply pump for the sterilized water. It is characterized by having.

In the flush toilet system, in particular, a sterilizing tank is provided with a spiral pipe in the processing tank, and ozone-containing air or ozone gas is supplied in small bubbles from the lower opening of the spiral pipe. Thus, the water to be treated is passed through a pipe by an air lift action to contact the water to be treated with ozone.

Accordingly, organic matter is decomposed and denitrified by aerobic treatment in the aeration tank. In the salt treatment tank, the salt concentration of the circulating treated water is reduced by the action of halophilic microorganisms and sterilized by ozone sterilization. The treated water is used as clean water that can be reused and reused as toilet water.

In the sterilization treatment with ozone, when ozone gas is supplied in the form of small bubbles into a spiral pipe arranged in a processing tank, the foam rises in the pipe, but at the same time, the surrounding objects to be treated are lifted by an air lift action. Water also rises in the piping. Therefore, the supply of the ozone gas sequentially feeds the water to be treated into the pipe, and the water to be treated and the ozone gas come into contact with each other in the passage time in the pipe, thereby achieving efficient ozone sterilization.

[0010]

Next, an embodiment of the present invention will be described. The system shown in the embodiment includes a flush toilet 1, an anaerobic sedimentation tank unit 2, a first aeration tank unit 3, a second aeration tank unit 4,
It comprises a salt treatment tank section 5, a sterilization section 6, and a water supply section 7.

The flush toilet 1 is the same as a normal one.
The water tank 11 is provided. Anaerobic sedimentation tank 2
Performs the primary anaerobic treatment of the water to be treated. The water to be treated is toilet wastewater (filtration and wastewater) a and aerated water b (B + C), and aerated water B and C Is provided with a return pipe 21 for receiving the supply of water. The return pipe 21 may be an air lift pipe using aeration. The treated water A after the anaerobic treatment is sent to the next first aeration tank unit 3 by overflow.

The first aeration tank unit 3 and the second aeration tank unit 4 receive aeration from the blow 31 and perform aerobic treatment. The first aeration tank unit 3 and the second aeration tank unit 4 are provided with appropriate filter media 32 and 41 therein.
Is oyster shell and zeolite, and the filter medium 41 of the second aeration tank unit 4 is oyster shell and charcoal. The treated water B in the first aeration tank section 3 is sent to the next second aeration tank section 4 (overflow), where the aeration processing is performed again.

The salt-treatment tank unit 5 has a filter medium (having a halophilic microorganism (commercially called biomite)) attached to a tank for receiving the aerated water C from the second aeration tank unit 3. (Coal) 51 is settled down.

The sterilization section 6 is provided with a separate ozone generator 61, a spiral pipe 63 is provided in a processing tank 62, and ozone-containing air or ozone gas G is reduced from the lower opening of the spiral pipe 63. It is supplied in the form of foam.

The water supply section 7 is provided with a supply pump 71 for using the treated circulating water E treated by the sterilization section 6 as toilet water, and a pipe 72.

Next, the processing in each section will be described.
First, in the first aeration tank 3, air from the blow 31 is supplied to decompose the stain of the treated water A by aerobic bacteria attached to the filter medium 32. In the aeration, Usually, bacteria treated with organic substances are dominant, and organic substances are decomposed in the first aeration tank unit 3.
Furthermore, nitrogen present in the form of ammonia is converted from nitrite nitrogen to nitrate nitrogen when transferred to the contact aeration tank, and the water to be treated in the tank becomes acidic, so add a calcareous filter medium such as oyster shell. Be neutralized by keeping.

In the second aeration tank section 4, the first aeration tank section 3
In the second aeration tank, denitrification treatment (nitrogen is released as nitrogen gas) is mainly performed in the second aeration tank because most of the organic matter is decomposed in the water B that has been subjected to the aeration treatment in the above. Completely decompose the remaining organic matter.

Therefore, in the treatment in the anaerobic tank settling tank section 2, the denitrifying bacteria are facultative anaerobic bacteria, breathe when oxygen is present, and when they are not present, secure energy by fermentation and reproduce. It grows regardless of aerobic or anaerobic, and if there is no oxygen, it will decompose nitrate nitrogen and nitrite nitrogen to obtain oxygen, so the first containing nitrate nitrogen and nitrite nitrogen When the treated waters B and C in the second aeration tank sections 3 and 4 are returned to the anaerobic precipitation tank section 2, denitrification processing is performed.

The treated water C which has undergone the decomposition and denitrification treatment of organic matter is sent to the next salt treatment tank section 5 to reduce the salt content in the treated circulating water D by the action of halophilic microorganisms. Although the exact cause of the salinity reduction is unknown, the halophilic microorganisms take in the salt due to their growth and the residual salinity in the salinity treatment tank increases, but there is no increase in the salinity of the circulating water. It is inferred. Then, the circulating water D that has been subjected to the salt content is sent to the next sterilizing section 6.

In the sterilization section 6, when the ozone gas G is supplied into the spiral pipe 63 in the form of small bubbles, the foam rises in the pipe 63, but at the same time, the surrounding water to be treated (salt-treated) The circulating water D also rises in the pipe. Therefore, by the continuous supply of the ozone gas G, the water D to be treated and the ozone gas G come into contact with each other during the passage through the pipe 63, and efficient ozone sterilization is realized.

Since the sterilized water E is clean water,
It can be used again as toilet water, and a completely non-drained flush toilet system is realized.

It should be noted that the present invention is not limited to the above-described embodiment, and even if there is no anaerobic sedimentation tank and denitrification is insufficient,
Neutralization with calcareous is sufficient as long as it can be used as toilet water. Further, a backwashing mechanism may be arranged in each aeration tank as needed. Furthermore, after using it for a long period of time, the sludge is removed from each tank as needed.

[0023]

As described above, the present invention relates to a non-drainable flush toilet system in which a salt treatment tank section for performing salt treatment of circulating water by a halophilic microorganism of aerated water is provided. This solves the problem of increased salt concentration associated with the adoption of a circulation system that treats and reuses wastewater to make it into wastewater, and has ensured the practical use of a non-drainable flush toilet system.

[Brief description of the drawings]

FIG. 1 is a simple overall system diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the sterilization processing unit.

[Explanation of symbols]

 Reference Signs List 1 flush toilet 11 water storage tank 2 anaerobic sedimentation tank part 21 return pipe 3 first aeration tank part 31 blow 32 filter medium 4 second aeration tank part 41 filter medium 5 salt treatment tank part 51 filter medium 6 sterilization treatment part 61 ozone generator 62 treatment tank 63 Spiral pipe 7 Water supply unit 71 Supply pump 72 Pipe

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Claims (2)

[Claims] 1. A flush toilet, an aeration tank for receiving an object to be treated from the flush toilet and performing aerobic treatment, and accepting aerated water to reduce a salt concentration of circulating treatment water by halophilic microorganisms. A salinity treatment tank unit, a sterilization treatment tank unit for sterilizing circulating water subjected to salt treatment, and a service water supply unit having a supply pump for supplying sterilized circulating water to a flush toilet. Drain type flush toilet system. 2. A spiral pipe is provided in the treatment tank, and ozone-containing air or ozone gas is supplied in small bubbles from the lower opening of the spiral pipe, and the water to be treated passes through the pipe by an air lift action. The non-drainable flush toilet system according to claim 1, further comprising a sterilization treatment tank section configured to contact the water to be treated with ozone.