CN217265361U

CN217265361U - Four-stage septic tank

Info

Publication number: CN217265361U
Application number: CN202220908246.9U
Authority: CN
Inventors: 李万选
Original assignee: Fujian Zhihuan Environmental Protection Technology Co Ltd
Current assignee: Fujian Zhihuan Environmental Protection Technology Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-08-23
Anticipated expiration: 2032-04-19

Abstract

The utility model relates to a septic tank purification treatment technical field, in particular to level four septic tank, including the level four septic tank, the level four septic tank includes the delivery port, and is close to the delivery port is located the packing layer of delivery port below, the packing layer has the porous structure of mutual intercommunication, porous structure's aperture is 2 ~ 7mm, porous structure's effective specific surface area is at 1170 ~ 1200m ² /m ³ . The utility model provides a level four septic tank drainage quality accords with the regulation of GB18918-2002 standard, can directly arrange outward.

Description

Four-stage septic tank

Technical Field

The utility model relates to a septic tank purification treatment technical field, in particular to level four septic tank.

Background

The traditional septic tank has only 3-stage treatment capacity, harmful microorganisms (bacteria, fungi and viruses) in excrement are treated mainly through the first-stage and second-stage anaerobic reactions, and the nitrogen and phosphorus content of discharged materials is reduced through the third-stage aerobic reaction, so that the quality of discharged water is improved. However, the traditional biological bacteria (participating in the anaerobic reaction and the aerobic reaction) are easy to be lost in a large amount in the drainage process, so that the efficiency of the anaerobic reaction and the aerobic reaction is greatly reduced, the drainage quality is obviously reduced, and the pollution degree of the drainage to the environment is increased. Therefore, the drainage of the traditional three-stage septic tank is generally required to be collected into a sewage treatment station for further treatment, so that the drainage reaches the discharge standard. However, this treatment increases the load on the sewer line and increases the early investment.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: provides a four-stage septic tank with drainage meeting the discharge standard.

In order to solve the technical problem, the utility model discloses a technical scheme be: level four septic tanks, including the fourth level septic tank, the fourth level septic tank includes the delivery port, and is close to the delivery port is located the packing layer of delivery port below, the packing layer has the porous structure of intercommunication each other, porous structure's aperture is 2 ~ 7mm, porous structure's effective specific surface area is 1170 ~ 1200m ² /m ³ 。

The filler layer is made of hydrophilic polyurethane biological denitrification filler.

The fourth-stage septic tank further comprises a first-stage septic tank, a second-stage septic tank and a third-stage septic tank which are sequentially arranged along the water inlet to the water outlet and are mutually communicated, and the fourth-stage septic tank is communicated with the third-stage septic tank through a pipeline.

The fourth-stage septic tank is provided with a feed inlet connected with the pipeline, the feed inlet is butted with one side surface of the packing layer, and the orthographic projection of the side surface of the feed inlet is positioned in the side surface.

Wherein, all be provided with the closing cap on first order septic tank, the second grade septic tank, third level septic tank and the fourth level septic tank.

The beneficial effects of the utility model reside in that: through set up the packing layer that is located the delivery port below in the fourth level septic tank to biological fungus is held back and is fixed in the hole of packing layer in with the liquid manure through the porous structure of packing, thereby when avoiding biological fungus to run off in a large number along with the drainage process, the packing layer has increased the breed area of biological fungus, and prolonged the clean time to the liquid manure, thereby make the drainage through the delivery port accord with GB 18918-2002's regulation, in order to avoid further inserting sewage treatment station with the drainage, and then reduce investment cost.

Drawings

Fig. 1 is a sectional view of a four-stage septic tank according to an embodiment of the present invention.

Description of reference numerals: 1. a water inlet; 2. a water outlet; 3. a first-stage septic tank; 4. a second-stage septic tank; 5. a third-stage septic tank; 6. a fourth-stage septic tank; 7. a filler layer; 8. a pipeline; 9. a feed inlet; 10. and (7) sealing the cover.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, the four-stage septic tank comprises a fourth-stage septic tank 6, wherein the fourth-stage septic tank 6 comprises a water outlet 2 and a packing layer 7 which is close to the water outlet 2 and is positioned below the water outlet 2, the packing layer 7 is provided with a porous structure which is communicated with each other, the aperture of the porous structure is 2-7 mm, and the effective specific surface area of the porous structure is 1170-1200 m ² /m ³ 。

The packing layer 7 is arranged below the water outlet 2, and as the packing layer 7 is of a porous structure and has a density smaller than that of the liquid manure, at least part of the packing layer 7 can float on the liquid manure. Meanwhile, the size of the packing layer 7 should be matched with that of the fourth-stage septic tank 6, that is, the cross-sectional profile of the packing layer 7 should be the same as that of the fourth-stage septic tank 6, so as to prevent liquid dung which is not treated by the biological bacteria in the packing layer 7 from being discharged directly through the water outlet 2 through a gap between the packing layer 7 and the wall of the fourth-stage septic tank 6.

The pore diameter of the porous structure is 2-7 mm. Illustratively, the pore diameter of the porous structure is 2-7 mm, 3-7 mm, 4-6 mm.

The effective specific surface area of the porous structure is 1170-1200 m ² /m ³ . Illustratively, the effective specific surface area of the porous structure is 1170m ² /m ³ 、1175m ² /m ³ 、1179m ² /m ³ 、1180m ² /m ³ 、1186m ² /m ³ 、1189m ² /m ³ 、1200m ² /m ³ . Preferably, the effective specific surface area of the porous structure is 1189m ² /m ³ Under the effective specific surface area, the phenomenon that the treatment efficiency of the packing layer 7 is reduced due to the fact that the rate of the liquid manure passing through the packing layer 7 is too low caused by too small effective specific surface area is effectively avoided, and the phenomenon that the treatment time of biological bacteria is relatively shortened due to the fact that the rate of the liquid manure passing through the packing layer 7 is too high caused by too large effective specific surface area is effectively avoided, so that the drainage quality of the liquid manure cannot reach the regulation of GB18918-2002 (50 mg/L of total nitrogen and 6mg/L, BOD 570 mg/L of total phosphorus).

Preferably, the material of the filler layer 7 is hydrophilic polyurethane biological denitrification filler. The hydrophilic polyurethane biological denitrification filler has hydrophilic groups such as a cationic active group and hydroxyl, can firmly fix negatively charged biological bacteria in the holes, can effectively avoid the biological bacteria from being greatly lost under the shearing action of water and gas, and can increase the culture space of the biological bacteria so as to increase the load of the biological bacteria, thereby further improving the purification degree of the liquid dung. More preferably, the hydrophilic polyurethane biological denitrification filler is formed by double explosion of oxygen and hydrogen. The reduction of the content of nitrogen, phosphorus and BOD in the liquid manure is realized by the digestion of the biological bacteria and the neutralization of positive ions carried by the packing layer 7.

The filler layer 7 may be a single piece of hydrophilic polyurethane biological denitrification filler, or may be formed by stacking a plurality of pieces of hydrophilic polyurethane biological denitrification fillers, and in order to make the hydrophilic polyurethane biological denitrification filler stacked in a specific shape and density, the hydrophilic polyurethane biological denitrification filler is preferably stacked in a specially-made net frame.

Further, the level four septic tank still includes along water inlet 1 to delivery port 2 set gradually and the first order septic tank 3, second level septic tank 4 and the third level septic tank 5 of intercommunication each other, fourth level septic tank 6 through pipeline 8 with third level septic tank 5 is linked together. The first-stage septic tank 3, the second-stage septic tank 4 and the third-stage septic tank 5 can adopt the conventional design of the existing three-stage septic tank, and therefore, the scheme is not limited thereto.

Preferably, the fourth-stage septic tank 6 is provided with a feed inlet 9 connected with the pipeline 8, the feed inlet 9 is butted with one side surface of the packing layer 7, and the orthographic projection of the feed inlet 9 on the side surface is positioned in the side surface. The pipeline 8 is connected with a feed inlet 9 of the fourth-stage septic tank 6 so as to enable the fourth-stage septic tank 6 to be communicated with the third-stage septic tank. The orthographic projection of the feed port 9 on the side surface is positioned in the side surface, namely, the liquid dung entering through the feed port 9 is fed into the packing layer 7 to be filtered and then flows into the tank of the fourth-stage septic tank 6.

Further, the first-stage septic tank 3, the second-stage septic tank 4, the third-stage septic tank 5 and the fourth-stage septic tank 6 are all provided with a sealing cover 10.

The utility model provides a level four septic tank can be used to purify places such as family's lavatory, city lavatory, tourism lavatory, lake house lavatory, marine house lavatory.

Example 1

Referring to fig. 1, the four-stage septic tank comprises a fourth-stage septic tank 6, wherein the fourth-stage septic tank 6 comprises a water outlet 2 and a packing layer 7 which is close to the water outlet 2 and is positioned below the water outlet 2, the packing layer 7 is provided with a porous structure which is communicated with each other, the pore diameter of the porous structure is 2-7 mm, and the effective specific surface area of the porous structure is 1189m ² /m ³ ；

The material of the packing layer 7 is hydrophilic polyurethane biological denitrification packing;

the four-stage septic tank also comprises a first-stage septic tank 3, a second-stage septic tank 4 and a third-stage septic tank 5 which are sequentially arranged along the water inlet 1 to the water outlet 2 and are mutually communicated, and the fourth-stage septic tank 6 is communicated with the third-stage septic tank 5 through a pipeline 8;

the fourth-stage septic tank 6 is provided with a feed inlet 9 connected with the pipeline 8, the feed inlet 9 is butted with one side surface of the packing layer 7, and the orthographic projection of the feed inlet 9 on the side surface is positioned in the side surface;

and the first-stage septic tank 3, the second-stage septic tank 4, the third-stage septic tank 5 and the fourth-stage septic tank 6 are all provided with sealing covers 10.

Specifically, the excrement enters a four-stage septic tank through a water inlet 1, is sequentially treated by a first-stage septic tank 3, a second-stage septic tank 4 and a third-stage septic tank 5 to form excrement liquid, and enters a fourth-stage septic tank 6 through a feed inlet 9 through a pipeline 8. At the moment, the liquid dung is firstly filtered by the packing layer 7, the filtrate flows into a pool of the fourth-stage septic tank 6, impurities in the filtrate are fully precipitated in the process that the filtrate is continuously accumulated, the filtrate at the upper layer is immersed in the packing layer 7 in the process that the filtrate continuously rises and is in contact with biological bacteria growing in holes of the packing layer 7 to carry out biological reaction, so that nitrogen, phosphorus and BOD in the filtrate leached from the upper end face of the packing layer 7 are remarkably reduced to reach the discharge standard of GB18918-2002, and finally the filtrate is discharged outside through the water outlet 2. In a specific experiment, the arrangement of the filling layer enables the volume ratio of biological bacteria in the four-stage septic tank to be increased by 30-100 times or even more than that of the biological bacteria in the traditional septic tank (three-stage septic tank). The detection proves that the total nitrogen and the total phosphorus of the filtrate (the drainage water in the text) discharged by the scheme are 13mg/L and 0.42mg/L, BOD 58 mg/L respectively, and the quality of the filtrate within 90 days all reaches the discharge standard.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. Level four septic tank, its characterized in that, including the septic tank of level four, the septic tank of level four includes the delivery port, and is close to the delivery port is located the packing layer of delivery port below, the packing layer has the porous structure of intercommunication each other, porous structure's aperture is 2 ~ 7mm, porous structure's effective specific surface area is 1170 ~ 1200m ² /m ³ 。

2. The four-stage septic tank of claim 1, wherein the material of the filler layer is hydrophilic polyurethane biological denitrification filler.

3. The four-stage septic tank of claim 1, further comprising a first-stage septic tank, a second-stage septic tank and a third-stage septic tank which are arranged in sequence from the water inlet to the water outlet and are communicated with each other, wherein the fourth-stage septic tank is communicated with the third-stage septic tank through a pipeline.

4. The fourth-stage septic tank of claim 3, wherein the fourth-stage septic tank has a feed inlet connected with the pipeline, the feed inlet is butted against a side surface of the packing layer, and an orthographic projection of the feed inlet on the side surface is positioned in the side surface.

5. The four-stage septic tank of claim 3, wherein the first-stage septic tank, the second-stage septic tank, the third-stage septic tank and the fourth-stage septic tank are all provided with a sealing cover.