CN212712930U

CN212712930U - Domestic sewage treatment equipment suitable for scattered farmers

Info

Publication number: CN212712930U
Application number: CN201921624978.XU
Authority: CN
Inventors: 梁良
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-16
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a domestic sewage treatment device suitable for scattered farmers, which comprises an anaerobic reactor connected with a water inlet pipe, an aerobic reactor communicated with the anaerobic reactor and a precipitation separation tank communicated with the aerobic reactor, wherein an air stripping reflux pump is arranged between the aerobic reactor and the precipitation separation tank; the anaerobic reactor comprises a primary anaerobic unit and a secondary anaerobic unit connected with the primary anaerobic unit through a pipeline, the water inlet pipe is communicated with the primary anaerobic unit, and the aerobic reactor is communicated with the secondary anaerobic unit; the equipment carries out multi-stage biochemical reaction treatment on sewage through various treatment units with different functions, and a user can select different numbers and types of biochemical reactors to be used in series or in parallel according to local actual conditions and pollution discharge requirements.

Description

Domestic sewage treatment equipment suitable for scattered farmers

Technical Field

The utility model relates to a sewage treatment technical field, concretely relates to be fit for domestic sewage treatment equipment that dispersion peasant household used.

Background

With the rapid development of social economy in China and the acceleration of urban and rural integration processes, the life style of farmers is also changed greatly. Sanitary wares, washing machines, bathing facilities and the like are moved to ordinary families. Daily water consumption and domestic sewage discharge of rural people are increased dramatically. Meanwhile, due to the use of a large amount of chemical fertilizers, the use of traditional farmyard manure is reduced, and the rural domestic sewage loses the digestion path. In recent years, the disordered discharge of rural domestic sewage becomes an important pollution source of rural environment, and causes the blackening and stink of water in rural river channels, the disappearance of fishes and shrimps and the breeding of mosquitoes and flies. Pathogenic bacteria and worm eggs in the domestic sewage can also cause disease transmission, so that the health of the masses is greatly influenced, and the treatment of the domestic sewage in rural areas is urgently needed.

Most areas of China are mainly mountainous and hilly, most farmers live in a dispersed form, the mode of imitating the urban centralized domestic sewage treatment through a pipe network is obviously unrealistic, the terrain environment is complex on one hand, the rural areas are wide on the other hand, the farmers live in a dispersed manner, the cost of the pipe network is higher than that of treatment equipment, the management is complex, and the treatment efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a domestic sewage treatment device who is fit for dispersion peasant household to solve current sewage treatment device and account for a land big, the management is complicated, and be not applicable to the problem of dispersion peasant household domestic sewage.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a domestic sewage treatment device suitable for decentralized farmers comprises an anaerobic reactor connected with a water inlet pipe, an aerobic reactor communicated with the anaerobic reactor and a precipitation separation tank communicated with the aerobic reactor, wherein an air stripping reflux pump is arranged between the aerobic reactor and the precipitation separation tank;

the anaerobic reactor comprises a primary anaerobic unit and a secondary anaerobic unit connected with the primary anaerobic unit through a pipeline, the water inlet pipe is communicated with the primary anaerobic unit, and the aerobic reactor is communicated with the secondary anaerobic unit.

Furthermore, the primary anaerobic unit and the secondary anaerobic unit respectively comprise an anaerobic tank with a water inlet and a water outlet, a central guide pipe vertically arranged in the anaerobic tank and communicated with the water inlet pipe, a fixed bed biological packing layer arranged above the inside of the anaerobic tank and an activated sludge area arranged below the inside of the anaerobic tank, and cast iron scraps are added into the activated sludge area.

Further, aerobic reactor is in including aerobic jar, the vertical setting that has water inlet and delivery port aerobic jar in and with the honeycomb duct of the pipe connection of anaerobic jar delivery port department, setting are in the aeration subassembly of the inside bottom of aerobic jar and packing are in suspension carrier in the aerobic jar packs, the lower extreme of honeycomb duct is provided with the filter screen, the aerobic jar with the sedimentation tank passes through the pipeline intercommunication, just the tip that the pipeline is close to the aerobic jar is provided with the filter screen.

Further, the precipitation separation tank include with the good oxygen jar passes through the precipitation separation tank body of pipe connection, sets up the precipitation separation tank is internal and with the central honeycomb duct of the pipeline intercommunication of good oxygen jar water outlet department and setting are in the internal fixed bed biological packing layer of precipitation separation tank, precipitation separation tank body upper end is provided with the processing water discharge opening.

Furthermore, a return pipe connected with the flow guide pipe is arranged on the gas stripping reflux pump.

Further, anaerobic jar, good oxygen jar and the precipitation separation jar body all include the last jar body and the lower jar of body that are the toper structure, just the macrostoma end lid of going up the jar body is closed down the macrostoma of the jar body is served, the top of going up the jar body is provided with the access cover.

Further, the outer walls of the upper tank body and the lower tank body are both coated with heat-insulating layers.

Further, the fixed bed biological filler layer comprises a filler interception net and a filler bearing net which are arranged in the upper tank body, and fixed bed biological filler filled between the filler interception net and the filler bearing net.

Further, the aeration component comprises a microporous aerator arranged at the bottom end of the aerobic tank, a gas pipe communicated with the microporous aerator and a fan which is positioned outside the aerobic tank and communicated with the gas pipe.

Further, the inside bottom of anaerobic jar and the inside bottom of the precipitation separation jar body all are provided with the reflecting plate, just the reflecting plate respectively with central honeycomb duct is corresponding with lead dirty pipe.

The utility model discloses following beneficial effect has: the utility model provides a domestic sewage treatment device suitable for scattered peasant household uses, this equipment carries out multistage biochemical reaction to sewage through the processing unit of various different functions and handles, and the treatment effeciency is comprehensive, and the user can select different quantity types of biochemical reactor to make up according to local actual conditions and blowdown requirement, according to local conditions, uses the flexibility height, and the treatment effeciency is high; the anaerobic reactor is used for degrading all or part of macromolecular organic matters which cannot be degraded by aerobic microorganisms, pre-treatment is carried out on aerobic biochemical treatment, the decontamination reliability is ensured, and a large amount of active anaerobic biomembrane is attached to the surface of the filler on the upper part in the anaerobic tank, so that the anaerobic biomass in the whole anaerobic tank is effectively improved, and the treatment efficiency is ensured; the aerobic tank is filled with suspended carrier filler which accounts for 30 to 40 percent of the volume of the tank body, a biological membrane is attached to the filler and grows on the filler, aerobic bacteria are taken as a main body on the surface layer of the biological membrane, and the nitrification reaction can be realized; the inner layer of the biological membrane takes facultative bacteria as a main body, and can realize the denitrification reaction of nitrate and nitrite, thereby synchronously realizing the nitrification and denitrification processes in the aerobic tank; the microorganism and suspended solid in the sewage are precipitated through the precipitation separation tank, and the treated water can be discharged more stably and reach the standard through further interception of the packing layer and the purification effect of the microorganism attached to the surface of the packing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of an anaerobic tank, an aerobic tank or a precipitation separation tank of the utility model;

the reference numerals shown in fig. 1 to 2 are respectively expressed as: 101-water inlet pipe, 1-anaerobic reactor, 2-aerobic reactor, 3-precipitation separation tank, 4-air stripping reflux pump, 10-primary anaerobic unit, 11-secondary anaerobic unit, 110-anaerobic tank, 111-central guide pipe, 112-filler component, 113-activated sludge zone, 114-cast iron scrap, 20-aerobic tank, 21-guide pipe, 22-filler, 30-precipitation separation tank, 32-treated water discharge port, 41-air stripping reflux pump, 42-reflux pipe, 102-upper tank, 103-lower tank, 104-inspection cover, 120-filler interception net, 121-filler bearing net, 201-microporous aerator, 202-air pipe and 5-reflecting plate.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 2, a domestic sewage treatment apparatus suitable for decentralized farmers includes an anaerobic reactor 1 connected with a water inlet pipe 101, an aerobic reactor 2 communicated with the anaerobic reactor 1, and a precipitation separation tank 3 communicated with the aerobic reactor 2, and an air stripping reflux pump 4 is provided between the aerobic reactor 2 and the precipitation separation tank 3;

the equipment is formed by connecting various treatment units with different treatment functions through pipelines, namely an anaerobic reactor 1, an aerobic reactor 2 and a precipitation separation tank 3 are connected in series through pipelines. The aerobic reactor 2 decomposes and further decomposes and purifies organic pollutants, and simultaneously realizes nitrification and denitrification (the denitrification is realized by means of the metabolism of facultative microorganisms in the inner layer of the biofilm on the filler). Particulate matters in the sewage are filtered and precipitated through the precipitation separation tank 3, so that the indexes of the discharged water reach the standard. When the anaerobic biological treatment device works, domestic sewage passes through the septic tank and then enters the anaerobic reactor 1 from the water inlet pipe 101 for treatment, and treated liquid after the anaerobic treatment enters the aerobic reactor 2 for aerobic biochemical treatment. Then the treated liquid enters a precipitation separation tank, a precipitation process is carried out in the precipitation separation tank, meanwhile, the filler layer at the upper part has the function of a biological filter, and the denitrification can be further realized because a biomembrane taking facultative aerobes as a main body is attached to the filler carrier, so that the total nitrogen content can be greatly reduced. The supernatant is discharged from the discharge port or reused. When in use, according to the requirements of environmental protection departments, the treatment units with proper functions and quantity are selected to be combined according to the different requirements of village population gathering degree, sewage generation scale, emission direction, human living environment improvement requirements and pollutant emission total quantity control of the receiving water body. For example: in some areas without strict requirements on total nitrogen and total phosphorus discharge, an aerobic reactor 2 and a precipitation separation tank 3 can be omitted, so that the whole set of equipment becomes an unpowered composite bed anaerobic reactor and equipment for sewage treatment by sewage self-flow. The investment cost can be greatly reduced, and no energy is consumed during the operation.

The anaerobic reactor 1 comprises a primary anaerobic unit 10 and a secondary anaerobic unit 11 connected with the primary anaerobic unit 10 through a pipeline, a water inlet pipe 101 is communicated with the primary anaerobic unit 10, and the aerobic reactor 2 is communicated with the secondary anaerobic unit 11. The anaerobic digestion process is divided into a hydrolysis acidification stage, an acetic acid production stage and a methane production stage, the anaerobic reactor 1 forms two-stage anaerobic treatment, the first-stage anaerobic unit 10 has the characteristic of a typical acid production stage and has the environment of acid production bacteria growth and reproduction and high activity, the second stage has the characteristic of a methane production stage and has the environment of methane bacteria growth and reproduction and high activity, and sewage containing organic pollutants enters the aerobic biochemical reactor for further biochemical treatment after anaerobic digestion. The anaerobic treatment is a continuous microbial process in which a plurality of different microorganisms play a role in a synergistic manner, so that some macromolecular organic matters which cannot be degraded by aerobic microorganisms can be completely or partially degraded. Namely, the aerobic biochemical treatment is carried out for pretreatment, and then the waste water is subjected to subsequent aerobic biochemical treatment and finally reaches the discharge standard.

The primary anaerobic unit 10 and the secondary anaerobic unit 11 both comprise an anaerobic tank 110 with a water inlet and a water outlet, a central draft tube 111 vertically arranged in the anaerobic tank 110 and communicated with the water inlet pipe 101, a fixed bed biological packing layer 112 arranged above the inside of the anaerobic tank 110 and an activated sludge area 113 arranged below the inside of the anaerobic tank 110, and cast iron scraps 114 are added into the activated sludge area 113. The fixed bed biological filler layer 112 comprises a filler interception net 120, a filler supporting net 121 and a fixed bed biological filler filled between the filler interception net 120 and the filler supporting net 121, and the fixed bed biological filler is preferably triangular spiral filler with large specific surface area and small hydraulic resistance. In the anaerobic tank 110, a large amount of anaerobic biofilms with good activity can be attached to the surface of the fixed bed biological filler, sewage is treated through the biofilms, the activated sludge area 113 at the lower part in the anaerobic tank 110 has high biomass concentration, and sludge in the activated sludge area 113 has high methanogenic activity and good sedimentation performance, so that the sewage entering the anaerobic tank 110 is subjected to anaerobic treatment. In order to maintain the concentration and activity of anaerobic microorganisms, cast iron scraps 114 or cast iron powder are added into the anaerobic tank 110, and ferrous ions released by the cast iron scraps or the cast iron scraps powder through micro-electrolysis meet the growth and propagation requirements of the anaerobic microorganisms and have the effect of removing phosphorus. The principle is that the treatment liquid containing ferrous ions enters a rear aerobic chamber, reacts with dissolved oxygen in water, and then the generated ferric ions react with phosphate ions in water to generate insoluble ferric phosphate precipitate which is gathered at the bottom of the precipitation chamber, so that the phosphorus content of the discharged water is reduced. Excess sludge generated in the aerobic tank 20 and the precipitation separation tank 30 and sludge formed by iron phosphate precipitation and the like are periodically pumped out by a gas stripping pump or a manual pump.

The aerobic reactor 2 comprises an aerobic tank 20 with a water inlet and a water outlet, a draft tube 21 vertically arranged in the aerobic tank 20 and connected with a pipeline at the water outlet of the anaerobic tank 110, an aeration component arranged at the bottom end inside the aerobic tank 20 and a suspended carrier filler 22 filled in the aerobic tank 20, wherein a filter screen is arranged at the lower end of the draft tube 21, a pipeline is arranged at the water outlet of the aerobic tank 20, and the aerobic tank 20 is communicated with the precipitation separation tank 3. The sewage treated by the anaerobic tank 110 flows into the aerobic tank 20 through the draft tube 21 for aerobic treatment. The aeration component is used for aerating in the aerobic tank 20, wherein the aeration component comprises a microporous aerator 201 arranged at the bottom end of the aerobic tank 20, an air pipe 202 communicated with the microporous aerator 201 and a fan which is positioned outside the aerobic tank 20 and communicated with the air pipe 202, and under the action of the fan, the air is supplied to the microporous aerator 201 through the air pipe 202, and the oxygen content in the mixed liquid is increased under the action of an aeration system. The aerobic tank 20 is filled with the suspended carrier filler 22, and because the suspended carrier filler 22 is used as a special structure of a biological carrier, a biological membrane is attached to and grows on the surface of the biological carrier, the outer layer of the biological membrane takes aerobic bacteria as a main body and can realize nitration reaction, and the inner layer takes facultative bacteria as a main body and can realize denitrification of nitrate, namely, nitrification and denitrification processes are synchronously realized in the same reactor. Thus, the nitrifying liquid can be saved from returning to a water conveying pump, and the ammonia nitrogen and the total nitrogen in the sewage can also reach the purpose of simultaneous reduction.

In order to deal with the problem of large water discharge in the peak water consumption stage, the volume of each tank body is larger than the total water discharge in the peak primary water consumption stage (the volume of each tank body of the equipment is 0.4m 3-0.8 m3), all stages of treatment units are in series arrangement, and treatment liquid in all stages of treatment units and pipelines is in a plug flow state instead of a complete mixing state. When the new raw water to be treated enters the first-stage anaerobic unit, the treated mixed liquid originally stored in the first-stage anaerobic unit enters the second-stage anaerobic unit in a plug flow state, and the raw water to be treated is not mixed in the second-stage anaerobic unit. Similarly, the mixed liquid of the previous stage treatment unit enters the aerobic tank and is originally stored in the aerobic tank, the mixed liquid which is oxidized and degraded enters the precipitation separation tank in a plug flow state, and the mixed liquid which is not treated by the previous stage is not mixed. Meanwhile, a large amount of biological films are attached to the filler layer and the filler carrier in the precipitation separation tank to carry out subsequent purification on the mixed liquid, so that the water quantity at the peak stage of water consumption can be completely met.

The precipitation separation tank 3 comprises a precipitation separation tank body 30 connected with the aerobic tank 20 through a pipeline, a central guide pipe 111 arranged in the precipitation separation tank body 30 and communicated with the pipeline, and a fixed bed biological filler layer 112 arranged in the precipitation separation tank body 30, wherein the upper end of the precipitation separation tank body 30 is provided with a treated water discharge port 32. The mixed liquid treated by the aerobic tank 20 is discharged into the precipitation separation tank 30 through the central guide pipe 111, the suspended carrier filler 22 in the precipitation separation tank 30 filters particulate matters in the sewage and deposits at the bottom of the precipitation separation tank 30, the sludge flows back into the aerobic tank 20 through the air stripping reflux pump 4, and the treated supernatant is discharged or reused through the treated water discharge port 32.

During the period of no water use, the anaerobic reactor can not be supplemented with water quantity, although the water flow in the suspended sludge layer can not form a continuous upflow state, thereby influencing the biochemical reaction of the activated sludge on the organic waste, the anaerobic treatment tank is provided with a packing layer, and a large amount of anaerobic biofilms are attached and grown on the surface of the packed fixed bed biological packing, thereby continuously carrying out anaerobic digestion on the organic waste in the treatment liquid.

The tank body of the equipment can be made of carbon steel, plastic, glass fiber reinforced plastic or stainless steel. In the utility model, the anaerobic tank 110, the aerobic tank 20 and the precipitation separation tank 30 are the upper tank body 102 and the lower tank body 103 which are in frustum-shaped structures, and the sections of the upper tank body and the lower tank body are regular circles, ellipses or approximate circles. And the big opening end of the upper tank body 102 is covered on the big opening end of the lower tank body 103 and is connected by bolts or welded for sealing. The top of upper canister 102 is provided with access cover 104. The tank body is of a stackable conical structure, so that the transportation is convenient, the transportation cost is saved, and the tank body can be transported to the site and then assembled and installed. And the combined tank body is installed in a buried manner, and the small opening end of the upper tank body 102 faces upwards, so that the anti-floating property after soil filling is improved, and the overall stability is improved.

In order to improve the performance of the device in the alpine region, the utility model discloses in, the equal cladding of upper tank body 102 and lower tank body 103 outer wall has the heat preservation.

The device can be used for treating domestic sewage, and can also be used for treating sewage discharged by industries such as small-sized health houses or small-scale breeding and the like. The device can be connected in parallel and in series for different sewage discharge with different scales.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The domestic sewage treatment equipment suitable for scattered farmers is characterized by comprising an anaerobic reactor (1) connected with a water inlet pipe (101), an aerobic reactor (2) communicated with the anaerobic reactor (1) and a precipitation separation tank (3) communicated with the aerobic reactor (2), wherein an air stripping reflux pump (4) is arranged between the aerobic reactor (2) and the precipitation separation tank (3);

anaerobic reactor (1) include one-level anaerobism unit (10) and with one-level anaerobism unit (10) pass through pipe connection's second grade anaerobism unit (11), inlet tube (101) intercommunication is in on one-level anaerobism unit (10), aerobic reactor (2) with second grade anaerobism unit (11) are linked together.

2. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 1, characterized in that the primary anaerobic unit (10) and the secondary anaerobic unit (11) each comprise an anaerobic tank (110) having a water inlet and a water outlet, a central draft tube (111) vertically arranged in the anaerobic tank (110) and communicated with the water inlet tube (101), a fixed bed bio-filler layer (112) arranged above the inside of the anaerobic tank (110), and an activated sludge zone (113) arranged below the inside of the anaerobic tank (110), wherein cast iron scraps (114) are added into the activated sludge zone (113).

3. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 2, characterized in that the aerobic reactor (2) comprises an aerobic tank (20) having a water inlet and a water outlet, a flow guide pipe (21) vertically arranged in the aerobic tank (20) and connected with a pipeline at the water outlet of the anaerobic tank (110), an aeration assembly arranged at the bottom end inside the aerobic tank (20), and a suspended carrier filler (22) filled in the aerobic tank (20), wherein the lower end of the flow guide pipe (21) is provided with a filter screen, the aerobic tank (20) is communicated with the precipitation separation tank (3) through a pipeline, and the end of the pipeline close to the aerobic tank is provided with a filter screen.

4. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 3, characterized in that the precipitation separation tank (3) comprises a precipitation separation tank body (30) connected with the aerobic tank (20) through a pipeline, a central draft tube (111) arranged in the precipitation separation tank body (30) and communicated with the pipeline at the water outlet of the aerobic tank (20), and a fixed bed bio-filler layer (112) arranged in the precipitation separation tank body (30), wherein the upper end of the precipitation separation tank body (30) is provided with a treated water discharge port (32).

5. The domestic sewage treatment equipment suitable for decentralized farmers according to claim 4, wherein the air stripping reflux pump (4) is provided with a reflux pipe (42) connected with the draft tube (21).

6. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 5, characterized in that the anaerobic tank (110), aerobic tank (20) and sedimentation separation tank (30) each comprise an upper tank (102) and a lower tank (103) in a conical structure, and the large mouth end of the upper tank (102) is covered on the large mouth end of the lower tank (103), and the top of the upper tank (102) is provided with an access cover (104).

7. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 6, characterized in that the outer walls of the upper tank body (102) and the lower tank body (103) are both covered with an insulating layer.

8. The domestic sewage treatment equipment suitable for decentralized peasant use according to claim 7, characterized in that the fixed bed bio-filler layer (112) comprises a filler interception net (120) and a filler support net (121) arranged in the upper tank (102) and a fixed bed bio-filler filled between the filler interception net (120) and the filler support net (121).

9. The domestic sewage treatment equipment suitable for decentralized peasant household use according to claim 3, characterized in that the aeration assembly comprises a microporous aerator (201) arranged at the bottom end of the aerobic tank (20), an air delivery pipe (202) communicated with the microporous aerator (201), and a fan located outside the aerobic tank (20) and communicated with the air delivery pipe (202).

10. The domestic sewage treatment apparatus suitable for decentralized farmer use according to claim 4, wherein the inner bottom end of the anaerobic tank (110) and the inner bottom end of the sedimentation and separation tank body (30) are provided with a reflection plate (5), and the reflection plates (5) correspond to the central draft tube (111) and the central draft tube (111), respectively.