JPS6242794A - Purging tank - Google Patents

Abstract

PURPOSE:To make a quick and thorough decomposition treatment of the dirt water of pretreated excretions during the time when said water arrives at an upper layer part by packing saw dust into a treatment tank thoroughly shut off from the outside to form a propagation bed for activated sludge bacteria groups, etc., and discharging the above-mentioned dirt water into the deep layer part of the propagation bed. CONSTITUTION:The saw dust is packed into the treatment tank 1 which is thoroughly shut off from the outside by a circumferential wall to form the propagation bed 2 for the activated sludge bacteria groups and halophilic bacteria groups. The dirt water of the pretreated excretions is discharged into the deep layer part 2a of the bed 2 and is subjected to the decomposition treatment during the time when said water arrives at the upper layer part 2b. As a result, the quick decomposition, digestion and thorough purge by decomposition of the sewage are executed and the smells of the dire water are removed by a absorbing and decomposing the same into the propagation bed so that no smells are emitted to the outside.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a septic tank that can purify domestic wastewater, especially feces and sewage, with a simple device, does not generate odor, and is inexpensive. It is.

(Prior art) Reliable purification of domestic wastewater is an important issue as part of improving living conditions, and conventionally various purification systems have been used to resolve the crushing pronunciation of Chireichi 41i @ Nboki IJ7. The first treatment tank is used as a breeding bed for microorganisms, and the tank is filled with low-grade coal whose cellulose content has been destroyed by acid treatment to create a breeding bed for activated sludge bacteria and halophilic microorganisms. In some cases, a secondary treatment tank was installed to carry out purification treatment.

(Problems to be solved by the invention) However, the cost is relatively high because the second treatment tank uses acid-treated coal, and the equipment itself is large and complicated with partitions, etc. Water is introduced from the top of the tank and flows in a step-like manner, so the odor of filthy water is dissipated without being absorbed, and the top surface of the coal seam filled in the tank is Therefore, it becomes covered and does not penetrate into the inner layer, flowing only on the upper surface, and
There were problems such as the flow of filthy water injected into the tank being difficult to spread over the entire surface of the tank, resulting in poor contact efficiency with the coal grains and insufficient decomposition by bacteria. In addition, sewage tends to accumulate on the top surface of the coal seam, and since oxygen is not supplied to the inner layer, only anaerobic bacteria are present, generating harmful gases.

(Means for Solving the Problems) The present invention is a septic tank proposed to eliminate the various problems mentioned above. Fig. 1 shows the basic configuration of the present invention. The sealed treatment tank 1 is filled with scum and used as a breeding bed 2 for activated sludge bacteria and halophilic microorganisms, and the pretreated sewage water is transferred from the primary treatment tank through pipe 3. It is discharged into the deep layer of the breeding bed 2 and decomposed while reaching the upper layer.

(Function) The raw manure water is first treated and decomposed, and the filthy water with no room for undecomposed solid waste is discharged into the deep layer 2a of the breeding bed 2 in the treatment tank 1.

It is gradually pushed up to the upper part 2b. The breeding bed 2 is filled with Okakuzu, and since Okakuzu is in the form of fine particles, the ground surface area is large, and the contact effect between the activated sludge bacteria group and the halophilic microorganism group is good. Digestion and decomposition of organic wastewater, that is, nitrogenous organic matter, is actively carried out, and wastewater is rapidly decomposed and digested.

At the same time, due to the presence of halophilic microorganisms, surplus sludge is decomposed and removed into water and carbon dioxide, and after the sludge is subjected to the decomposition action of activated sludge bacteria, it is further affected by this halophilic microorganism, Since the scum is decomposed and removed, clogging of the scum layer is effectively prevented, and the filthy water is completely decomposed and reduced while it reaches the upper layer 2b from the deep layer 2a. Therefore, the odor of filthy water is also absorbed and decomposed within the breeding bed and deodorized, and the odor does not go outside.

(Embodiment) Fig. 2 shows an embodiment of the present invention, in which excrement and urine from a toilet bowl 6, which is a septic tank 1 incorporated in a septic treatment system as shown in Fig. 3, is pretreated together with water from a tank 6. It is poured into the tank 7, where it is primarily treated so that no undecomposed solid waste remains, and the antibiotics, chemicals, and salts excreted from the body are decomposed and sent to the treatment tank 1.

The treatment tank 1 is made of concrete, synthetic resin, etc., and is completely isolated from the outside by a peripheral wall 1a, and the inside is filled with acid-treated sawdust that has been made porous to contain activated sludge bacteria and halophilic microorganisms. are planted and used as breeding bed 2.

A delivery pipe is opened in the center of the treatment tank 1 from the pretreatment tank 7 to the deep layer 2a of the breeding bed 2. Reference numeral 4 indicates a pipe for aeration, and reference numeral 5 indicates a ventilation pipe with an exhaust fan, which is configured to introduce air through pipe 4 to activate the activity of aerobic bacteria and promote decomposition. be.

(Effects) The septic tank according to the present invention is constructed as described above, and has the following features: 1. Since the septic tank is used as a breeding bed, there is no need to specifically formulate the treatment tank, and it is easy to design and set up. 3+1 cape--9
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2. Okakuzu is easy to fill and take out, and can be replaced when the processing capacity decreases. 3. Also, since Okakuzu is originally a waste product, it can be obtained cheaply and can be replaced at low cost in conjunction with 2 above. .

4. Okakuzu is a fine grain, which has a large surface area as a whole, and it is easy to seep into the interior, making it suitable for a breeding nest for aerobic bacteria.The purification time is short due to its active decomposition.In particular, Okakuzu is treated with acid to make it porous. It would be even more effective.

5. The pretreated filthy water is discharged to the deep layer of the breeding bed, so the odor is absorbed and decomposed and disappears while reaching the upper layer.

6. Since the breeding bed is Okakuzu, unlike coal etc., aeration is easy and effective.

7. Since the decomposition effect is effective and natural transpiration is high, it can be used as the final treatment for nuclides.

8. Since the primary treated filthy water is purified in the pre-treatment tank, there is no need to worry about deterioration of decomposition ability due to chemicals, antibiotics, salt, or undecomposed filth.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the basic configuration of the present invention, FIG. 2 is a sectional view of an embodiment thereof, and FIG. 3 is a configuration explanatory diagram of a sewage purification system incorporating a septic tank according to the present invention. ■... Treatment tank, 2... Breeding bed, 2a... Deep layer,
2b... Upper part, 3... Delivery pipe.

Claims (1)

[Claims] A treatment tank that is completely isolated from the outside by a surrounding wall is filled with scum and serves as a breeding bed for activated sludge bacteria and halophilic microorganisms, and the pretreated sewage water is absorbed into the deep layer of the breeding bed. A septic tank characterized by being discharged into a septic tank and decomposed while reaching an upper layer.