CN214528631U

CN214528631U - Rural domestic sewage treatment system

Info

Publication number: CN214528631U
Application number: CN202122324503.2U
Authority: CN
Inventors: 潘静怡; 余明达; 王辉; 王竹; 韩增辉; 喻霈雯
Original assignee: Hunan Xiangxin Water Environmental Protection Investment And Construction Co ltd
Current assignee: Hunan Xiangxin Water Environmental Protection Investment And Construction Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2021-10-29
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses a rural domestic sewage treatment system, include: artificial wetland pool and anaerobic treatment device. The artificial wetland pool is filled with filler, a first anode plate, a second anode plate and a cathode plate which are horizontally arranged, the second anode plate and the cathode plate are obliquely arranged are sequentially embedded in the filler from bottom to top, the top of the filler is used for planting plants, the cathode plate is electrically connected with the first anode plate and the second anode plate respectively, the upper end part of the cathode plate extends out of the filler, the upper end of the artificial wetland pool is provided with a water outlet for discharging sewage, and the height of the cathode plate is lower than the water level of the sewage when the sewage can be discharged from the water outlet; the anaerobic treatment device is used for primarily purifying the sewage and then conveying the sewage to the bottom of the artificial wetland pool. The utility model provides a pair of rural domestic sewage treatment system, the effectual purification efficiency who has improved under the less condition of sewage flow.

Description

Rural domestic sewage treatment system

Technical Field

The utility model relates to a sewage treatment field especially relates to a rural domestic sewage treatment system.

Background

Along with the improvement of living standard of people, people pay more and more attention to environmental health, and the single-stage or multi-stage septic tank adopted can not meet the requirement of discharge standard. The treatment technology mainly comprising the anaerobic tank and the artificial wetland has certain application prospect due to convenient operation and maintenance and remarkable ecological environmental benefit. The artificial wetland is in a flooded state for a long time, and is in an upper aerobic state and a lower anaerobic state, so that the denitrification efficiency of a wetland system is limited; the artificial wetland system just meets the aerobic condition of the anaerobic cathode of the anode of the microbial fuel cell, and the microbial fuel cell can oxidize organic matters into carbon dioxide and H at the anode by using naturally enriched electrogenesis bacteria as a catalyst under the action of microbial electrochemistry⁺And e^-，e^-The electrons reach the cathode through an external circuit and react with electron acceptors such as oxygen, nitrate and the like to generate water. The microbial fuel cell has the advantages of no need of external energy, high degradation efficiency, wide fuel source and the like, and is widely applied to the field of degradation of organic pollutants. The existing artificial wetland coupling microbial fuel cell processing system has the defects of internal circuit disconnection or loose contact between an anode lead and an anode material (active carbon) caused by water quantity fluctuation, and when the system does not have electron flow, the abundance of electricity-generating bacteria on the electrode is gradually reduced, so that the system loses the microbial electrochemical effect, and the high-efficiency degradation effect of the microbial fuel cell cannot be exerted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a rural domestic sewage treatment system can make the high-efficient operation of microbial fuel cell under the undulant condition of sewage flow.

According to the utility model discloses a rural domestic sewage treatment system of first aspect embodiment, include: artificial wetland pool and anaerobic treatment device. The artificial wetland pool is filled with filler, a first anode plate, a second anode plate and a cathode plate are sequentially embedded in the filler from bottom to top, the first anode plate, the second anode plate and the cathode plate are horizontally arranged, the top of the filler is used for planting plants, the cathode plate is electrically connected with the first anode plate and the second anode plate respectively, the upper end of the cathode plate partially extends out of the filler, the upper end of the artificial wetland pool is provided with a water outlet for discharging sewage, and the height of the cathode plate is lower than the water level of the sewage when the sewage can be discharged from the water outlet; the anaerobic treatment device is communicated with the bottom of the artificial wetland pool.

According to the utility model discloses rural domestic sewage treatment system has following technological effect at least: the embodiment of the utility model provides a pair of rural domestic sewage treatment system, sewage are handled through anaerobic treatment device earlier to the macromolecule organic matter in the rural sewage of fully hydrolysising, sewage get into the artifical wetland pond after from the follow upward flow, then discharge from the delivery port. The negative plate, the first anode plate and the second anode plate form a microbial fuel cell for purifying sewage. When sewage flows through the first anode plate, the flow area of the first anode plates arranged horizontally is reduced, so that the flow speed is increased, the flow speed of the sewage flowing through the second anode plate is increased, the sewage flow speed on the lower surface of the second anode plate is increased due to the inclined arrangement of the second anode plate, and the purification efficiency under the condition of small sewage flow is effectively improved.

According to some embodiments of the utility model, the fixed plate has been buried underground to the filler level, the fixed plate is used for fixing the negative plate.

According to some embodiments of the utility model, the fixed plate is connected with vertical hollow oxygenating pipe, oxygenating pipe upper end height is greater than the delivery port height.

According to some embodiments of the utility model, the negative plate electric connection has the load, the load is kept away from the one end of negative plate respectively with first anode plate the second anode plate electric property links to each other.

According to some embodiments of the utility model, the anaerobic treatment device includes a plurality of anaerobism ponds that are used for purifying sewage and collects the canal that sewage was established ties in the anaerobism pond, a plurality of anaerobism pond, the canal with constructed wetland bottom of the pool intercommunication.

According to some embodiments of the utility model, adjacent between the anaerobism pond the catchment canal with adjacent rather than all be provided with the honeycomb duct between the anaerobism pond, honeycomb duct one end is connected anaerobism pond upper end, the other end extends to anaerobism pond lower part space.

According to some embodiments of the utility model, keep away from the ditch distance farthest the anaerobism pond is connected with the hand-basket grid, the hand-basket grid is arranged in separating the great pollutant of granule in the sewage.

According to some embodiments of the utility model, the catchment ditch top is equipped with the grid board to in observing the water level in the catchment ditch.

According to some embodiments of the utility model, the catchment ditch top height is greater than the delivery port height, the catchment ditch bottom is connected with and extends to the perforation water distributor of artifical wetland pond bottom.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of an installation structure of an embodiment of the present invention;

fig. 2 is a schematic view of an artificial wetland pool according to an embodiment of the present invention;

fig. 3 is a schematic view of an anaerobic treatment apparatus according to an embodiment of the present invention.

Reference numerals:

the artificial wetland pool 100, the filler 110, the first anode plate 120, the second anode plate 121, the cathode plate 130, the plants 140, the water outlet 150, the fixing plate 160, the oxygen supplement pipe 161 and the load 170;

the anaerobic treatment device 200, an anaerobic tank 210, a water inlet 201, a draft tube 211, a water outlet 212, a water collecting channel 220, a basket grid 230, a grid plate 221 and a perforated water distribution pipe 222.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the utility model discloses a rural domestic sewage treatment system of embodiment includes: the artificial wetland pool 100 and the anaerobic treatment device 200 are characterized in that the artificial wetland pool 100 is filled with a filler 110, and the filler 110 is made of cobblestones, gravel and other materials. A first anode plate 120, a second anode plate 121 and a cathode plate 130 which are horizontally arranged, are embedded in the filling 110 from bottom to top in sequence. A plurality of first anode plates 120 are connected in series, a plurality of second anode plates 121 are connected in series, and a plurality of cathode plates 130 are connected in series. The top of the filler 110 is used for planting plants 140, and the plants 140 can adopt phosphorus-rich plants such as canna indica, cane shoots and the like. The cathode plate 130 is electrically connected to the first anode plate 120 and the second anode plate 121 respectively to form a microbial fuel cell. The naturally enriched electrogenic bacteria are used as a catalyst, and organic matters are oxidized into carbon dioxide and H on the first anode plate 120 and the second anode plate 121⁺And e^-，e^-The electrons reach the cathode plate 130 through an external circuit, and react with electron acceptors such as oxygen and nitrate to generate water. The upper end part of the negative plate 130 extends out of the filler 110, the upper end of the artificial wetland pool 100 is provided with a water outlet 150 for discharging sewage, the height of the negative plate 130 is lower than the water level of the sewage when the sewage can be discharged from the water outlet 150, and the negative plate 130 is positioned under the water surface, so that the situation that the negative plate 130 cannot contact the sewage due to water shortage is avoided. The anaerobic treatment device 200 serves to primarily purify the sewage and then deliver the sewage to the bottom of the artificial wetland tank 100.

The utility model provides a pair of rural domestic sewage treatment system, sewage are handled through anaerobic treatment device 200 earlier to the macromolecule organic matter in the rural sewage of fully hydrolysising, sewage get into and flow from the bottom up behind the artifical wetland pond 100, then discharge from delivery port 150. The cathode plate 130, the first anode plate 120 and the second anode plate 121 form a microbial fuel cell for purifying sewage. When sewage flows through the first anode plates 120, the flow area of the first anode plates 120 which are horizontally arranged is reduced, so that the flow speed is increased, the flow speed of the sewage flowing through the second anode plates 121 is increased, the second anode plates 121 are obliquely arranged, the flow speed of the sewage on the lower surfaces of the second anode plates 121 is increased, and the purification efficiency under the condition of small sewage flow is effectively improved.

In some embodiments of the present invention, the fixing plate 160 is embedded in the filler 110, the fixing plate 160 is made of stainless steel mesh, and the fixing plate 160 is used to fix the cathode plate 130, so as to increase the stability of the position of the cathode plate 130, and facilitate the operation and maintenance.

In some embodiments of the present invention, the fixing plate 160 is connected to a vertical oxygen supply tube 161, and the oxygen supply tube 161 is a hollow stainless steel tube or a PVC tube. The upper end of the oxygen supplementing pipe 161 is higher than the water outlet 150, the lower end of the oxygen supplementing pipe 161 is connected with the fixing plate 160, the lower end of the oxygen supplementing pipe 161 is attached to the side wall of the cathode plate 130, and the oxygen supplementing pipe 161 is a hollow stainless steel pipe, so that when the oxygen supplementing pipe works, a water column equal to the liquid level in the artificial wetland pool 100 is arranged in the oxygen supplementing pipe 161. After oxygen enters the oxygen supply tube 161, the oxygen is dissolved in the water column in the oxygen supply tube 161, and then the oxygen is transported to the cathode plate 130 under the action of diffusion mainly to participate in the reduction reaction.

The cathode plate 130 is electrically connected to a load 170, and one end of the load 170 away from the cathode plate 130 is electrically connected to the first anode plate 120 and the second anode plate 121, respectively. The load 170 may be a powered device such as a light bulb or a resistor. So as to maintain the potential difference among the first anode plate 120, the second anode plate 121 and the cathode plate 130, and the purifying efficiency of the electrogenic bacteria is higher.

In some embodiments of the present invention, the anaerobic treatment device 200 comprises a plurality of anaerobic tanks 210 for purifying sewage and a collecting channel 220 for collecting sewage, the anaerobic tanks 210 are sequentially connected in series from left to right, the left end of the anaerobic tank 210 on the left side is provided with a water inlet 201 for sewage to enter, sewage flows through the anaerobic tanks 210 and the collecting channel 220 from left to right, and then enters the bottom of the artificial wetland tank 100 from the collecting channel 220. The sewage is purified by the plurality of anaerobic tanks 210, and the purification efficiency is effectively improved.

In some embodiments of the present invention, a flow guiding pipe 211 is disposed in the anaerobic tank 210, a water outlet 212 is disposed at the upper end of the right side of the anaerobic tank 210, the water outlet 212 is communicated with the right side adjacent anaerobic tank 210 or the water collecting channel 220, and the water outlets 212 have the same height. One end of the draft tube 211 is connected to the drain port 212, and the other end thereof extends to the lower space in the anaerobic tank 210. The draft tube 211 increases the flow path of the sewage in the anaerobic tank 210, and increases the residence time of the sewage in the anaerobic tank 210 to increase the purification efficiency. The sewage flows in the anaerobic tank 210, the water collecting channel 220 and the artificial wetland tank 100 by the self gravity of water, no power equipment is needed, and the operation and maintenance cost and difficulty are reduced.

In some embodiments of the present invention, the anaerobic tank 210 farthest from the water collecting channel 220 is connected with a basket grid 230, the basket grid 230 is connected to the right side of the water inlet 201, and the basket grid 230 is used for separating the pollutants with larger particles in the sewage flowing into the anaerobic tank 210 from the water inlet 201.

In some embodiments of the present invention, the top of the water collecting channel 220 is provided with a grid plate 221, which facilitates sampling and inspecting the effluent quality of the anaerobic tank 210 and observing the water level in the water collecting channel 220.

In some embodiments of the present invention, the height of the top of the water collecting channel 220 is greater than the height of the water outlet 150, so that when the flow of sewage is too large, the water level in the water collecting channel 220 is too high, the sewage will not flow out of the grid plate 221. The bottom of the water collecting channel 220 is connected with a perforated water distribution pipe 222 extending to the bottom of the artificial wetland pool 100, and the diameter of the water distribution pipe is 100-150 mm. The sewage in the collecting channel 220 enters the artificial wetland tank 100 from the perforated water distribution pipe 222. The perforated water distribution pipe 222 is provided with a plurality of small holes with the aperture of 5-10cm, so that the sewage is uniformly distributed to the bottom end of the artificial wetland tank 100.

The working principle is as follows: sewage enters the basket grid 230 from the water inlet 201 at the left end of the leftmost anaerobic tank 210, pollutants with large particles in the sewage separated by the basket grid 230 pass through the plurality of anaerobic tanks 210 from left to right in sequence under the action of gravity, macromolecular organic matters in rural sewage are fully hydrolyzed by the anaerobic tanks 210, then the sewage flows into the water collecting channel 220, under the action of gravity, the sewage flows through the perforated water distribution pipe 222 and uniformly enters the bottom of the artificial wetland tank 100, a microbial fuel cell consisting of the cathode plate 130, the first anode plate 120 and the second anode plate 121 carries out biodegradation on the sewage in the artificial wetland tank 100, solid impurities in the sewage are physically intercepted by the filler 110, and the plant 140 absorbs elements such as nitrogen and phosphorus in the sewage, so that the quality of the effluent reaches the standard. And then discharged from the water outlet 150.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rural domestic sewage treatment system is characterized by comprising:

the artificial wetland pool (100) is filled with a filler (110), a first anode plate (120) which is horizontally arranged, a second anode plate (121) which is obliquely arranged and a cathode plate (130) are sequentially embedded in the filler (110) from bottom to top, the top of the filler (110) is used for planting plants (140), the cathode plate (130) is respectively and electrically connected with the first anode plate (120) and the second anode plate (121), the upper end part of the cathode plate (130) extends out of the filler (110), the upper end of the artificial wetland pool (100) is provided with a water outlet (150) for discharging sewage, and the height of the cathode plate (130) is lower than the water level when the sewage can be discharged from the water outlet (150);

an anaerobic treatment device (200), wherein the anaerobic treatment device (200) is communicated with the bottom of the artificial wetland pool (100).

2. The rural domestic sewage treatment system of claim 1, wherein: a fixing plate (160) is horizontally embedded in the filler (110), and the fixing plate (160) is used for fixing the cathode plate (130).

3. The rural domestic sewage treatment system of claim 2, wherein: the fixing plate (160) is connected with a vertical hollow oxygen supplementing pipe (161), and the height of the upper end of the oxygen supplementing pipe (161) is larger than that of the water outlet (150).

4. The rural domestic sewage treatment system of claim 1, wherein: the negative plate (130) is electrically connected with a load (170), and one end of the load (170) far away from the negative plate (130) is respectively electrically connected with the first positive plate (120) and the second positive plate (121).

5. The rural domestic sewage treatment system of claim 1, wherein: the anaerobic treatment device (200) comprises a plurality of anaerobic tanks (210) for purifying sewage and a water collecting channel (220) for collecting the sewage in the anaerobic tanks (210), the anaerobic tanks (210) are connected in series, and the water collecting channel (220) is communicated with the bottom of the artificial wetland tank (100).

6. The rural domestic sewage treatment system of claim 5, wherein: it is adjacent between anaerobism pond (210) the canal that catchments (220) and adjacent rather than all be provided with honeycomb duct (211) between anaerobism pond (210), honeycomb duct (211) one end is connected anaerobism pond (210) upper end, the other end extends to anaerobism pond (210) lower part space.

7. The rural domestic sewage treatment system of claim 6, wherein: the anaerobic tank (210) which is farthest away from the water collecting channel (220) is connected with a basket grid (230), and the basket grid (230) is used for separating pollutants with larger particles in sewage.

8. The rural domestic sewage treatment system of claim 7, wherein: the top of the water collecting channel (220) is provided with a grid plate (221) so as to observe the water level in the water collecting channel (220).

9. The rural domestic sewage treatment system of claim 8, wherein: the top of the water collecting channel (220) is higher than the water outlet (150), and the bottom of the water collecting channel (220) is connected with a perforated water distribution pipe (222) extending to the bottom of the artificial wetland pool (100).