CN110642481B - Domestic sewage integrated treatment system suitable for villages and its treatment method - Google Patents

Abstract

The invention discloses a domestic sewage integrated treatment system suitable for villages. There is an anaerobic treatment unit at the corresponding position at the lower part of one side of the unit, and the inlet end of the anaerobic treatment unit is connected with the outlet end of the solid-liquid separation unit of the feed; there is a vertical submerged constructed wetland and a horizontal The subsurface flow constructed wetland, and the outlet end of the anaerobic treatment unit and the inlet end of the vertical subsurface constructed wetland are connected by a pipeline and a suction device arranged on the pipeline, and the outlet end of the vertical subsurface constructed wetland is connected with the horizontal subsurface constructed wetland Connected to the water inlet. The invention also discloses a domestic sewage treatment method suitable for villages; the invention has the advantage of improving the quality of sewage treatment.

Description

Domestic sewage integrated treatment system suitable for villages and its treatment method

technical field

The invention belongs to the technical field of sewage treatment in the technical field of environmental protection, and in particular relates to a domestic sewage integrated treatment system suitable for villages and a treatment method thereof.

Background technique

With the economic and social development and the improvement of people's living standards, the process of urbanization in my country is accelerating, but the number of rural population is large, the water consumption in rural areas is also increasing, and the total amount of discharge is large. According to reports, it is estimated that by 2020, my country's rural sewage discharge The total amount can reach nearly 30 billion tons. In urban areas where the population is concentrated, sewage can be collected and transported to a sewage treatment plant for treatment. However, this method involves a large number of collection pipe networks and is not applicable in rural areas where the population is scattered and the amount of domestic sewage is small. Distributed rural sewage has the characteristics of scattered sources, small discharge, and large changes in sewage quality and quantity. Due to the high content of ammonia nitrogen and organic matter, direct discharge will easily lead to eutrophication of rivers and lakes. Some untreated rural domestic sewage is discharged at will, causing various pollution accidents, which not only endangers the good rural ecological environment, but also threatens the safety of drinking water sources for the rural population. Therefore, using the existing sewage treatment technology, The treatment of rural decentralized sewage is imminent. The core of the "toilet revolution" is manure treatment, promoting the harmless treatment and resource utilization of manure.

Although the treatment technology of rural domestic sewage has various forms and mature technology, only the sewage treatment technology according to local conditions can truly achieve the purpose of controlling rural water pollution. Rural sewage mainly has the following characteristics: ① Relatively scattered and small in water volume. Generally, rural households live in scattered areas, with a relatively small number of people in a single household. The amount of domestic sewage produced is also small, and the concentration of pollutants in domestic sewage is also low. ②The coefficient of variation is large. The villagers' living laws are relatively consistent. The discharge of sewage is larger in the morning, noon and evening than in other periods of the day, and the discharge at night is small, and even the flow may be cut off, which has the characteristics of large variation and discontinuity. ③ It is difficult to collect. Discharge of domestic sewage in rural areas is relatively scattered, and most of them do not have a drainage network, making it difficult to collect. ④The technical and economic foundation of rural areas is weak, lack of funds and professional and technical personnel, and it is difficult to ensure the daily operation and maintenance of sewage treatment facilities. These characteristics of rural domestic sewage make it difficult to standardize its treatment. At present, less than 10% of the domestic sewage in the organic villages in the country has been treated. The treatment rate is low and needs to be improved urgently. Most of the rural areas are far from cities and towns. Spend huge sums of money.

The "Three-Year Action Plan for the Improvement of Rural Human Settlements" proposes to strengthen the construction of treatment facilities and pipelines in areas such as population gathering areas, central market towns, and ecological function areas, and promote four models according to local conditions according to the actual situation such as the location of the area and the degree of population living and concentration. : First, it is incorporated into the urban sewage pipe network management model, mainly for the towns with relatively concentrated population distribution and relatively complete pipe network construction. The second is the joint household governance model, which is mainly aimed at villages and groups with relatively large populations that are centrally distributed and far away from market towns. The whole village, the whole group or dozens of households are used as units to lay regional sewage pipes and pass the integrated sewage treatment equipment. and other methods to treat rural domestic sewage. The third is the single-family governance model, which is mainly aimed at remote villages with relatively small populations and scattered distribution, and the construction of sewage treatment facilities to treat the domestic sewage of a single farmer. Fourth, the constructed wetland sewage treatment model, combined with farmland irrigation, ecological protection and restoration and environmental landscape construction, promotes the utilization of sewage resources, and realizes the multi-win of domestic sewage treatment, ecological agriculture development, and rural ecological civilization construction.

Chinese patent application (CN105481203A) discloses a domestic sewage treatment system. In the technical solution disclosed in the patent application, the position corresponding to the outlet end of the sewage collection pipe on the pre-sedimentation tank and the overflow pipe on the pre-sedimentation tank are used. A grid is set at the corresponding position of the inlet end for solid-liquid separation. This structure of solid-liquid separation cannot separate solid-liquid well, and the separated solid part will still carry a large amount of liquid components, which greatly reduces sewage treatment. ability. Chinese patent (CN204939208U) discloses a circulating domestic sewage purification system. In the patented technology, the sewage after anaerobic treatment is evenly distributed on the lower end of the constructed wetland by using pipes. The structure is relatively complex and the sewage distribution is not uniform enough, resulting in the artificial wetland. The effect of purifying sewage can not be well exerted. And in the above technology, the sewage is anaerobic or anaerobic and sent to the constructed wetland for treatment. )deal with.

Therefore, how can we provide a more compact structure, can improve the quality of sewage treatment, improve the sewage treatment capacity, and can better separate the sludge and feces in the village domestic sewage. And the processing method thereof has become a technical problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a domestic sewage integrated treatment system and its treatment method suitable for villages with a more compact structure, which can improve the sewage treatment effect and improve the sewage treatment capacity. .

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A domestic sewage integrated treatment system suitable for villages, comprising a feed solid-liquid separation unit, the feed solid-liquid separation unit is provided with a feed port and is used for connecting with a sewage water inlet pipeline; An anaerobic treatment unit is arranged at the lower part of one side of the liquid separation unit, and the water inlet end of the anaerobic treatment unit is connected to the water outlet end of the solid-liquid separation unit of the feed, and packing is arranged in the anaerobic treatment unit; Above the unit are vertical subsurface flow constructed wetlands and horizontal subsurface constructed wetlands. The vertical subsurface flow constructed wetlands and the horizontal subsurface constructed wetlands are each filled with fillers and plants are planted, and the water outlet of the anaerobic treatment unit is connected to the vertical subsurface constructed wetland. The water ends are connected with the suction device arranged on the pipeline through the pipeline, and the water outlet end of the vertical submerged flow constructed wetland is connected with the water inlet end of the horizontal subsurface constructed wetland. out of water.

In this way, when the above-mentioned integrated treatment system for domestic sewage works, the domestic sewage in the village is collected, and then flows into the solid-liquid separation unit, the anaerobic treatment unit, the vertical subsurface flow artificial wetland and the horizontal subsurface artificial wetland in sequence from the sewage inlet pipe. Wetland; the feed solid-liquid separation unit can separate the solid and liquid components in the domestic sewage, so that the separated sewage continues to enter the anaerobic treatment unit. When the anaerobic treatment unit treats the sewage, the sewage is complicated. The organic matter is degraded and converted into simple organic matter, and the organic pollutants, pathogenic bacteria and part of nitrogen and phosphorus in the domestic sewage are removed; then it flows into the vertical subsurface constructed wetland and the horizontal subsurface constructed wetland for treatment. During the treatment of constructed wetlands, the built-in fillers can be implanted by biological bacteria, and can adsorb, retain, filter, redox, precipitate, microbial decomposition, transformation, plant shading, residue accumulation, transpiration moisture and nutrient absorption of pollutants. Purification effect; coupled with the oxygen transport of some wetland plant roots, and the different flow patterns and oxygen content changes of sewage in different locations of the constructed wetland, the water flow will experience sufficient aerobic and anaerobic treatment processes when it flows in it. This coexistence of aerobic and anaerobic conditions provides different suitable niches for aerobic, facultative anaerobic and anaerobic microorganisms in the root zone, which will surely promote the further degradation and transformation of pollutants. Especially the nitrification and denitrification in the process of sewage denitrification make the constructed wetland system play a unique role in sewage treatment. to improve the quality of sewage treatment. Finally, the water treated by the constructed wetland becomes clear and harmless and then discharged. Therefore, the above-mentioned treatment system has the characteristics of being able to realize manure diversion, returning manure to fields, reuse of reclaimed water, and synergistic removal of pollutants. play a role in protecting the environment. In addition, the above-mentioned layout of the treatment system makes its structure more compact; the entire treatment process can improve the quality of sewage treatment and the capacity of sewage treatment.

As an optimization, the anaerobic treatment unit includes a first unit of anaerobic treatment, a second unit of anaerobic treatment and a third unit of anaerobic treatment, which are spaced from each other and arranged side by side in the horizontal direction; the upper end of the first unit of anaerobic treatment is the water inlet end and It is connected to the water outlet end of the feed solid-liquid separation unit, the lower end of the first anaerobic treatment unit is the water outlet end and is connected to the water inlet end of the lower end of the second anaerobic treatment unit, and the upper end of the second anaerobic treatment unit is the water outlet end and is connected to the third unit of anaerobic treatment. The water inlet end of the upper end is connected, and the lower end of the three anaerobic treatment units is the water outlet end and is connected to the water inlet end of the suction device.

In this way, the anaerobic treatment unit is set up into the first unit of anaerobic treatment, the second unit of anaerobic treatment and the third unit of anaerobic treatment, and the space layout is cleverly used to prolong the residence time of water treatment. The ground shields the entry of oxygen at both ends, so that a very stable and durable anaerobic area is formed at the inner center position to ensure the reliability and stability of anaerobic treatment. It can carry out anaerobic fermentation and denitrification treatment of organic matter in domestic sewage in a targeted manner, providing sufficient conditions for subsequent aerobic nitrification treatment, and can better ensure the quality stability of sewage treatment.

Further, a mud discharge pipe is arranged at the lowest part of the bottom of the anaerobic treatment unit, and the mud discharge pipe is connected with the external mud storage tank. It can be turned on regularly and used to drain the sludge accumulated at the bottom of the anaerobic treatment unit to avoid clogging.

As an optimization, the suction device is a submersible sewage pump.

In this way, the use of the submersible sewage pump as the suction device has the advantages of being less likely to be blocked, having a simple structure and being convenient to use.

As an optimization, a first water tank is arranged on one side of the anaerobic treatment unit, and the water inlet end of the first water tank is connected to the water outlet end of the anaerobic treatment unit; the submersible sewage pump is arranged at the bottom of the first water tank, and the first water tank side A liquid level detection probe is arranged on the wall, and the liquid level detection probe is connected with the electric control end of the submersible sewage pump and is used to control the start and stop of the submersible sewage pump according to whether the detected liquid level reaches or not; a second water tank is spaced above the first water tank, And a jet aerator is arranged between the first water tank and the second water tank; the jet aerator has a liquid inlet pipe connected to the water outlet of the submersible sewage pump, and an air inlet pipe communicated with the outside air, and also has a There is a jet outlet pipe communicated with the second water tank; the water outlet end of the second water tank is upwardly connected with the vertical submerged constructed wetland.

In this way, after the domestic sewage flows into the first water tank after treatment, when the liquid level in the first water tank reaches the preset value, the liquid level detection probe is triggered to control the submersible sewage pump to work and pump the sewage to the aerator, and the sewage is in the jet flow. The water and air in the aerator are fully mixed to achieve the purpose of reoxygenation, and then the jet from the water outlet end of the aerator enters the second water tank, and the air and liquid are fully mixed again in the second water tank to achieve full reoxygenation. After the re-oxygenation treatment, it can provide enough oxygen components for the subsequent sewage treatment, so that the subsequent aerobic treatment area can be formed and the quality of sewage treatment can be improved. When the sewage after reoxygenation treatment is treated in the vertical subsurface constructed wetland, an aerobic treatment area conducive to the reproduction of aerobic bacteria is formed in the space area where the filter filler in the vertical subsurface constructed wetland and the plant root system are mixed. At the same time, it has the comprehensive treatment effect of filler adsorption, plant root absorption and aerobic nitrification treatment, so that pollutants in sewage can be better adsorbed, retained, filtered, redox, precipitation, microbial decomposition, transformation, plant shielding, Residue accumulation, transpiration of water and nutrient absorption for better purification.

As an optimization, the upper end surface of the second water tank is provided with a plurality of evenly distributed water outlets and the bottom of the vertical subsurface constructed wetland communicates with the water inlet.

In this way, the second water tank can isolate the anaerobic area below to ensure its anaerobic environment effect, make the air intake and liquid fully mix to ensure the subsequent aerobic treatment effect, and evenly distribute water to the upper vertical submerged constructed wetland to reduce water flow Multiple functions such as impact on plant roots. When the sewage flows from the second water tank to the vertical subsurface constructed wetland during work, the upper end face of the second water tank is provided with a plurality of evenly distributed water outlets, so that the sewage can enter the vertical subsurface constructed wetland more evenly and improve the vertical subsurface constructed wetland. processing effect.

As an optimization, the vertical subsurface flow constructed wetland includes a vertical subsurface constructed wetland unit 1, a vertical subsurface constructed wetland unit two, and a vertical subsurface constructed wetland three units, which are independent of each other and are arranged side by side in the horizontal direction. The lower end of the first unit of the constructed wetland is provided with a bottom overflow hole and is connected to the outlet end of the second water tank; the upper end of the first unit of the vertical submerged flow constructed wetland is the outlet end and is connected with the water inlet end of the upper end of the second unit of the vertical submerged flow constructed wetland. The lower end of the second unit of the wetland is the outlet end and is connected to the water inlet end of the lower end of the third unit of the vertical subsurface flow constructed wetland; and the third unit of the vertical subsurface flow constructed wetland is connected to the inlet end of the horizontal subsurface flow constructed wetland.

In this way, the vertical subsurface flow constructed wetland is set up into a vertical subsurface constructed wetland unit, a vertical subsurface constructed wetland unit two, and a vertical subsurface constructed wetland unit three, which can specifically treat the pollutants in the sewage and improve the sewage treatment. quality. Specifically, the sewage is denitrified by the anaerobic treatment unit and then enters the second water tank for aeration and reoxygenation (enters the second water tank after aeration and reoxygenation). Sewage mixed with air and enriched with oxygen enters the vertical subsurface constructed wetland, and then goes up and down in turn and passes through the three units of the vertical subsurface constructed wetland. The vertical subsurface constructed wetland is filled with the structure of plant roots, and It is conducive to the implantation and reproduction of water treatment microorganisms in the filler and plant roots. In this way, the sewage flows through a long path in the vertical submerged constructed wetland. When the sewage first enters the area, it is an aerobic treatment area with high oxygen content, and the microbial aerobic bacteria with high oxygen demand conduct biological filtration. At the same time, combined with fillers Filtration and plant root uptake improve treatment efficiency. Then, as the sewage continues to flow in the vertical subsurface constructed wetland, the oxygen content in the sewage gradually decreases, so the water treatment environment gradually transitions from aerobic to anoxic along the sewage flow path, and the implanted bacteria in the filler are also replaced by aerobic bacteria. (Vertical subsurface flow constructed wetland unit 1) gradually changed to micro-aerobic bacteria or facultative aerobic bacteria with lower oxygen demand (vertical subsurface flow constructed wetland unit two) to anaerobic bacteria (vertical subsurface flow constructed wetland unit three). The structure of such three vertical submerged constructed wetland units can greatly enrich the water treatment environment with different oxygen demands; at the same time, combined with the anaerobic treatment units in the previous treatment process, the sewage can form anaerobic treatment-aerobic treatment in sequence macroscopically. Treatment - anaerobic treatment, forming a macro treatment process of denitrification - nitrification - denitrification, which meets the needs of organic matter degradation. Combined with the absorption and transformation of plant roots, the water treatment effect is greatly improved.

As an optimization, it also includes a re-oxygenation tank arranged between the vertical subsurface-flow constructed wetland and the horizontal subsurface-type constructed wetland. The distance of the water drop from the outlet end of the type constructed wetland, and the outlet end of the re-oxygenation tank is connected to the inlet end of the horizontal subsurface flow type constructed wetland.

In this way, the water at the outlet end of the vertical subsurface constructed wetland can be more fully mixed with the air when it falls in the shape of a water curtain, and then enter the re-oxygenation tank, and can form a thin layer of water flow in the re-oxygenation tank, and the atmospheric re-oxygenation is faster. And the re-oxygenation tank re-oxygenates the water flow again, so that it can better improve the treatment effect after it enters the horizontal subsurface-flow constructed wetland.

As a further optimization, the water outlet end of the reoxygenation tank and the water inlet end of the horizontal subsurface flow constructed wetland are located in the middle of the height direction of the area where the horizontal subsurface flow constructed wetland is located, and the water outlet of the horizontal subsurface flow constructed wetland is located at the location of the horizontal subsurface constructed wetland. The upper end position in the height direction on the other side of the area.

In this way, the water flow after supplementing oxygen through the re-oxygenation tank enters from the middle of the horizontal subsurface constructed wetland, so that the lower part of the horizontal subsurface constructed wetland is an area with poor water fluidity and is conducive to the implantation of anaerobic and immobile bacteria. In contrast, the middle and upper parts of the horizontal subsurface constructed wetland are aerobic areas, and the overall mobility of the horizontal subsurface constructed wetland is relatively slow. Therefore, aerobic and anaerobic alternate treatment areas can be formed again in the horizontal subsurface constructed wetland, and the implantation environment provided by the water treatment bacteria in each area is generally different from that of the vertical subsurface artificial wetland due to the slow fluidity of the water body. Wetlands can form more abundant suitable niches for more types of aerobic, facultative anaerobic and anaerobic microorganisms in plant roots and fillers. Therefore, the setting of horizontal subsurface constructed wetland can further improve the overall water treatment effect of the system and improve the quality of sewage treatment. At the same time, in the horizontal subsurface-flow constructed wetland, after the water flow speed becomes slow, it can form the subsidence again before the water is discharged, which ensures the clarity of the water.

As an optimization, a layer of zeolite-loaded copper oxide antibacterial filler is placed on the top layer of the filler in the horizontal subsurface flow constructed wetland.

In this way, the SS can be removed by the antibacterial packing when the water flow passes through the top layer of the horizontal submerged constructed wetland packing, and the zeolite can further remove the phosphorus in the sewage, and at the same time efficiently kill the pathogenic bacteria for disinfection.

As an optimization, it also includes a post-processing unit connected to the water flow at the water outlet end of the horizontal submerged artificial wetness, and a drain pipe is connected to the water outlet end of the post-processing unit to form a water outlet; the post-processing unit is equipped with activated carbon.

In this way, by installing activated carbon in the post-processing unit, the activated carbon adsorbs and removes impurities in the water when the water flows through the post-processing unit, so that the effluent is clean and clear, and then discharged through the drain pipe connected to the water outlet of the post-processing unit.

As an optimization, the feed solid-liquid separation unit includes a solid-liquid separation tube arranged obliquely, a feces collection tank is arranged below the solid-liquid separation tube, and the upper end of the solid-liquid separation tube is opened diagonally upward and is directly connected to the sewage inlet. Below the discharge end of the pipeline, the lower end of the solid-liquid separation tube is provided with an end separation grid to form a water outlet, and a water collecting bucket is connected to the lower end of the corresponding solid-liquid separation tube; the upper end of the water collecting bucket is suspended at the lower end of the first rope, and the other end of the first rope Respectively bypass the first fixed pulley located above the water collecting bucket and the second fixed pulley located at the upper end of the solid-liquid separation pipe, and then connect downward to the upper end of the solid-liquid separation pipe; An automatic water outlet control device for controlling water outlet, the lower end of the solid-liquid separation pipe is connected to the lower end of the vertical second rope and rotatably positioned in the feed solid-liquid separation unit; so that when the solid-liquid separation pipe accumulates After a certain amount of solid components, the upper end can be rotated downward under the action of its own weight, and the water collecting bucket after the water outlet is pulled up through the first rope, and the upper end of the solid-liquid separation pipe can be rotated downward to an oblique downward state and accumulated in it. The solid component of the solid-liquid separation tube slides out from the open end to the feces collection tank below. After the solid component in the solid-liquid separation tube slides out, the water collecting bucket can pull the upper end of the solid-liquid separation tube back to the upwardly inclined state through the first rope; The solid-liquid separation unit is also provided with a vertical third rope, and the lower end of the third rope is connected with the water collecting bucket and is used to limit the water collecting bucket down to the limit position.

In this way, when the feed solid-liquid separation unit is in operation, the domestic sewage is collected and flows through the sewage inlet pipe, flows out from the outlet end of the sewage inlet pipe, and flows in from the open upper end of the solid-liquid separation pipe. After the domestic sewage flows into the solid-liquid separation tube, the solid-liquid separation tube intercepts the solid components in the domestic sewage and accumulates in the solid-liquid separation tube, and the liquid components in the domestic sewage flow out from the water outlet formed at the lower end of the solid-liquid separation tube and are collected. in the collection bucket. When a certain amount of solid components is accumulated in the solid-liquid separation pipe, the sewage collected in the water collecting bucket reaches a certain amount, and the automatic water outlet control device set at the water outlet controls the water outlet from the water outlet. After the sewage in the collecting bucket is emptied or released to a certain amount, and at the same time, the solid components in the solid-liquid separation tube accumulate to a certain amount, so that the two ends of the first rope are out of balance, the upper end of the solid-liquid separation tube can rotate downwards under the action of its own weight. Pull up the water collecting bucket after the water comes out through the first rope, and turn the upper end of the solid-liquid separation pipe downward to a state of oblique downward, and slide the accumulated solid components from the opening of the end to the fecal collection tank below . After the solid components in the solid-liquid separation tube slide out, the water collecting bucket can pull the upper end of the solid-liquid separation tube back to the upwardly inclined state through the first rope, so that the two ends of the first rope return to the original equilibrium state. Such a structure enables the solid-liquid separation tube to continuously adjust the solid-liquid separation tube until the solid-liquid separation tube slides out the collected solid components from the open end to the fecal collection tank below after the domestic sewage enters the solid-liquid separation tube. The solid-liquid separation of the domestic sewage entering into it is carried out continuously, which can better separate the sludge and manure in the domestic sewage of the village and improve the quality of sewage treatment.

In the specific implementation, the solid-liquid separation unit of the feeding material can also be directly set with an oblique grille, so that the waste to be treated falls on the grille and slowly slides down. During the sliding process, the liquid flows along the grille. Filter to the bottom of the grid, and the solid part slides out to the front with the grid, thereby realizing solid-liquid separation. The solid-liquid separation unit has a simpler structure and lower cost. However, in specific use, the residence time of the waste on the grid cannot be controlled, which often causes the liquid to slide down the grid together with the solid part before being filtered out in a very short time. This results in poor solid-liquid separation and difficult to control. When the above-mentioned solid-liquid separation unit is used, the solid part can stay in the solid-liquid separation tube and slowly filter out the liquid part, so it has a very good solid-liquid separation effect.

As an optimization, the lower part of the solid-liquid separation tube is provided with an internal separation grid along the axial direction, so that the upper part of the separation grid forms a solid part accumulation space, and the lower part of the separation grid forms a sewage gathering space.

In this way, after the domestic sewage waste (mainly feces) flows into the solid-liquid separation pipe, the waste first enters the solid part accumulation space formed on the upper part of the separation grid in the solid-liquid separation pipe. The part and the liquid part are separated, and the liquid part enters the lower part of the separation grid to form a sewage gathering space, and flows out from the outlet end of the solid-liquid separation pipe. In this way, solid-liquid separation can be performed immediately after the waste falls into the solid-liquid separation tube, so the solid-liquid separation efficiency of the solid-liquid separation tube can be improved, and the quality of solid-liquid separation can be improved.

As an optimization, a non-stick material is smeared on the inner cavity of the solid-liquid separation tube and the surface of the separation grid.

(preferably coated with nanomaterials).

In this way, during the solid-liquid separation, the solid part and the liquid part can be better separated, and when the solid part is poured from the solid-liquid separation tube to the feces collection tank, the solid part is not easy to adhere to the inner cavity of the solid-liquid separation tube. It has the advantage of more convenient realization of solid-liquid separation.

As an optimization, a vertical guide sliding fitting structure is added between the two sides of the water collecting bucket and the inner cavity wall of the solid-liquid separation unit of the feed.

In this way, a vertical guide sliding fitting structure is added between the two sides of the water collecting bucket and the inner cavity wall of the solid-liquid separation unit, so that the upper end of the solid-liquid separation pipe is rotated downward and the water collecting bucket after water is pulled up through the first rope. And when the water collecting bucket moves vertically downward and the upper end of the solid-liquid separation pipe is pulled back to the upwardly inclined state through the first rope, the vertical running of the water collecting bucket is more stable.

As an optimization, the automatic water outlet control device is a water tank provided corresponding to the water outlet hole and is used to control the water outlet from the water outlet hole at intervals.

In this way, the automatic water outlet control device is set as the existing water tank, which has the advantages of simple structure and convenient installation and use.

As an optimization, a water inlet channel is provided at the position corresponding to the water outlet hole at the lower end of the water collection bucket. The water inlet channel has a flat box structure as a whole, and the upper end and one side are open structures, and the open side of the water inlet channel forms a water outlet end. The upper end of the water inlet channel and the lower end of the water collection bucket The water outlet is connected.

In this way, a water inlet channel is provided at the position of the water outlet hole at the lower end of the water collecting bucket, and the open side of the water inlet channel forms a water outlet end and is used to connect with the water inlet end of the anaerobic treatment unit, which has the advantage of making the sewage enter the anaerobic treatment unit more uniformly.

The invention also discloses a domestic sewage treatment method suitable for villages, which is characterized in that it comprises the following steps: a firstly realize the solid-liquid separation of the domestic sewage, collect and process the separated solid part separately, and separate the separated liquid sewage Part of the follow-up purification treatment; b. The liquid sewage is sequentially subjected to intermittent anaerobic decomposition, aeration and oxygenation, and absorption by plant roots combined with vertical subsurface flow and horizontal subsurface flow to achieve aerobic and anaerobic composite decomposition. Finally, it is decomposed by zeolite The filler loaded with copper oxide is sterilized and the pathogenic bacteria in the sewage are eliminated.

In this way, using the above method to treat domestic sewage has the advantages of better sewage treatment quality and higher treatment efficiency.

As an optimization, the method is implemented by the integrated processing system of the above structure.

In this way, the implementation of the integrated treatment system with the above structure has the advantages of improving the quality of sewage treatment, improving the sewage treatment capacity, and being able to better separate the sludge and feces in the domestic sewage of the village.

To sum up, the beneficial effects of the present invention are as follows: realizing the diversion of feces, returning feces to the fields, reuse of reclaimed water, and synergistic removal of pollutants, and achieving good treatment effects under low-cost conditions; damage to protect the environment. The present invention uses the manure separation unit (and the aforementioned solid-liquid separation unit) to divert the manure to realize resource utilization, so that the manure enters the manure collection tank, and the sewage enters the anaerobic treatment unit; Under the action of anaerobic bacteria, complex organic matter is degraded and converted into simple organic matter, and energy is released at the same time; the oxygen environment in the wetland is poor, and the constructed wetland is still not enough to meet the requirements of organic matter and ammonia nitrogen when dealing with high-concentration sewage. Therefore, in the present invention, the effluent of the anaerobic unit is aerated and re-oxygenated by the jet aerator and the effluent of the vertical submerged constructed wetland is re-oxygenated by dropping the water to the re-oxygenation tank to solve the problem of the artificial wetland bed supply. The problem of insufficient oxygen; the biofilm on the constructed wetland filter material degrades the pollutants in the sewage, and there are a large number of plant roots, microorganisms and soil minerals in the upper soil to absorb, degrade and replace the pollutants in the sewage. Physical, chemical and biological effects , to achieve the purpose of purifying sewage; the top filler of the horizontal submerged constructed wetland is an antibacterial filler zeolite loaded with copper oxide, and the antibacterial filler will filter to remove SS when the water flows through. Activated carbon is installed in the post-processing unit, and the activated carbon adsorbs and removes impurities in the water when the water flows through the post-processing unit, so that the effluent is clean and clear; Sewage discharge standards. The invention has broad application prospects in the vast rural areas of our country.

Description of drawings

FIG. 1 is a schematic cross-sectional front view of an integrated domestic sewage treatment system suitable for a village according to a specific embodiment of the present invention (the arrows in the drawing indicate the flow direction of the liquid).

FIG. 2 is a schematic cross-sectional view in the horizontal direction of FIG. 1 .

FIG. 3 is a schematic cross-sectional front view of the anaerobic treatment unit and the first water tank in FIG. 1 .

Figure 4 is a schematic front view of the vertical subsurface flow constructed wetland, the re-oxygenation tank and the horizontal subsurface constructed wetland.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Specific implementation: As shown in Figures 1 to 4, an integrated domestic sewage treatment system suitable for villages includes a feed solid-liquid separation unit 51. The feed solid-liquid separation unit is provided with a feed port and is used to feed sewage with sewage. The water pipeline 52 is connected; it is characterized in that an anaerobic treatment unit 53 is arranged at a corresponding position at the lower part of one side of the feed solid-liquid separation unit, and the water inlet end of the anaerobic treatment unit is connected with the water outlet end of the feed solid-liquid separation unit, The anaerobic treatment unit is provided with filler; just above the anaerobic treatment unit is a vertical subsurface flow constructed wetland 54 and a horizontal subsurface constructed wetland 55, and the vertical subsurface flow constructed wetland 54 and the horizontal subsurface constructed wetland 55 are respectively equipped with fillers and Plants are planted, and the outlet end of the anaerobic treatment unit and the inlet end of the vertical subsurface flow type constructed wetland are connected by a pipeline and a suction device 56 arranged on the pipeline, and the outlet end of the vertical subsurface flow type constructed wetland is connected with the horizontal subsurface flow type constructed wetland. The water inlet ends are connected, and a water outlet end is arranged on the horizontal subsurface constructed wetland for water outlet.

In this way, when the above-mentioned integrated treatment system for domestic sewage is in operation, the domestic sewage in the village is collected, and then flows into the solid-liquid separation unit, anaerobic treatment unit, vertical subsurface artificial wetland and horizontal subsurface artificial wetland in sequence from the sewage inlet pipe. Wetland; the feed solid-liquid separation unit can separate the solid and liquid components in the domestic sewage, so that the separated sewage continues to enter the anaerobic treatment unit. When the anaerobic treatment unit treats the sewage, the sewage is complicated The organic matter is degraded and converted into simple organic matter, and the organic pollutants, pathogenic bacteria and part of nitrogen and phosphorus in the domestic sewage are removed; then it flows into the vertical subsurface constructed wetland and the horizontal subsurface constructed wetland for treatment. During the treatment of constructed wetlands, the built-in fillers can be implanted by biological bacteria, and can adsorb, retain, filter, redox, precipitate, microbial decomposition, transformation, plant shading, residue accumulation, transpiration moisture and nutrient absorption of pollutants. Purification effect; coupled with the oxygen transport of some wetland plant roots, and the different flow patterns and oxygen content changes of sewage in different positions of the constructed wetland, the water flow will experience sufficient aerobic and anaerobic treatment processes when it flows in it. The coexistence of aerobic and anaerobic conditions provides different suitable niches for aerobic, facultative anaerobic and anaerobic microorganisms in the root zone, which will surely promote the further degradation and transformation of pollutants. Especially the nitrification and denitrification in the process of sewage denitrification make the constructed wetland system play a unique role in sewage treatment. to improve the quality of sewage treatment. Finally, the water treated by the constructed wetland becomes clear and harmless and then discharged. Therefore, the above-mentioned treatment system has the characteristics of being able to realize manure diversion, returning manure to fields, reuse of reclaimed water, and synergistic removal of pollutants. play a role in protecting the environment. In addition, the above-mentioned layout of the treatment system makes its structure more compact; the whole treatment process can improve the quality of sewage treatment and the capacity of sewage treatment.

In this specific embodiment, the anaerobic treatment unit 53 includes a first anaerobic treatment unit 57, a second anaerobic treatment unit 58 and a third anaerobic treatment unit 59 that are spaced apart from each other and arranged side by side in the horizontal direction; The upper end of the unit is the inlet end and is connected to the outlet end of the feed solid-liquid separation unit; the lower end of the first unit of anaerobic treatment is the outlet end and is connected to the inlet end of the lower end of the second unit of anaerobic treatment, and the upper end of the second unit of anaerobic treatment is the outlet end It is connected with the water inlet end of the upper end of the three anaerobic treatment units, and the lower end of the three anaerobic treatment units is the water outlet end and is connected with the water inlet end of the suction device.

In this way, the anaerobic treatment unit is set up into the first unit of anaerobic treatment, the second unit of anaerobic treatment and the third unit of anaerobic treatment, and the space layout is cleverly used to prolong the residence time of water treatment. The ground shields the entry of oxygen at both ends, so that a very stable and durable anaerobic area is formed at the inner center position to ensure the reliability and stability of anaerobic treatment. It can carry out anaerobic fermentation and denitrification treatment of organic matter in domestic sewage in a targeted manner, providing sufficient conditions for subsequent aerobic nitrification treatment, and can better ensure the quality stability of sewage treatment.

In the specific implementation, the sewage passes through the first anaerobic treatment unit, the second anaerobic treatment unit, the third anaerobic treatment unit, the first anaerobic treatment unit, the second anaerobic treatment unit, and the third anaerobic treatment unit in the anaerobic treatment units. The preferred hollow spherical packing is used as the filler in The organic matter is degraded and converted into simple organic matter, and the organic pollutants, pathogenic bacteria and some nitrogen and phosphorus in the domestic sewage are removed by specially domesticated obligate anaerobic or facultative microorganisms attached to the inner and outer surfaces of the hollow spherical packing or suspended. The size of the anaerobic treatment unit is preferably 3.9m×9m×1.3m, and the hydraulic retention time is 22h. Corresponding to the first unit of anaerobic treatment and the bottom of the second unit of anaerobic treatment, a first mud discharge pipe and a second mud discharge pipe are connected to the bottom, and a first storage tank is respectively connected to the outer ends of the first mud discharge pipe and the second mud discharge pipe. The mud pool, the second mud pool, the first mud pool and the second mud pool are cubes each with a volume of 1 m ³ . It can be turned on regularly and used to drain the sludge accumulated at the bottom of the anaerobic treatment unit to avoid clogging.

In this specific embodiment, the suction device 56 is a submersible sewage pump.

In this way, the use of the submersible sewage pump as the suction device has the advantages of being less likely to be blocked, having a simple structure and being convenient to use.

In this specific embodiment, a first water tank 60 is arranged on one side of the anaerobic treatment unit, and the water inlet end of the first water tank is connected to the water outlet end of the anaerobic treatment unit; the submersible sewage pump is arranged at the bottom of the first water tank, A liquid level detection probe 61 is arranged on the side wall of the first water tank, and the liquid level detection probe is connected to the electric control end of the submersible sewage pump and is used to control the start and stop of the submersible sewage pump according to whether the detected liquid level reaches or not; There is a second water tank 62, and a jet aerator 63 is arranged between the first water tank and the second water tank; the jet aerator has a liquid inlet pipe connected to the water outlet of the submersible sewage pump, and also has a connection with the outside air. The connected air inlet pipe also has a jet outlet pipe communicated with the second water tank; the water outlet end of the second water tank is connected to the vertical submerged constructed wetland upward.

In this way, after the domestic sewage flows into the first water tank after treatment, when the liquid level in the first water tank reaches the preset value, the liquid level detection probe is triggered to control the submersible sewage pump to work and pump the sewage to the aerator, and the sewage is in the jet flow. The water and air in the aerator are fully mixed to achieve the purpose of reoxygenation, and then the jet from the water outlet end of the aerator enters the second water tank, and the air and liquid are fully mixed again in the second water tank to achieve full reoxygenation. After the re-oxygenation treatment, it can provide enough oxygen components for the subsequent sewage treatment, so that the subsequent aerobic treatment area can be formed and the quality of sewage treatment can be improved. When the sewage after reoxygenation treatment is treated in the vertical subsurface constructed wetland, an aerobic treatment area conducive to the reproduction of aerobic bacteria is formed in the space area where the filter filler in the vertical subsurface constructed wetland and the plant root system are mixed. At the same time, it has the comprehensive treatment effect of filler adsorption, plant root absorption and aerobic nitrification treatment, so that pollutants in sewage can be better adsorbed, retained, filtered, redox, precipitation, microbial decomposition, transformation, plant shielding, Residue accumulation, transpiration of water and nutrient absorption for better purification.

In a specific implementation, a first water tank is connected to the right side of the anaerobic treatment unit, and a third spacer is arranged between the first water tank and the third anaerobic treatment unit, which is vertical and whose lower end is spaced from the lower end of the anaerobic treatment unit. A first grid is arranged between the third baffle and the bottom of the anaerobic treatment unit, and a liquid level controller (the liquid level controller is the aforementioned liquid level detection probe) and a submersible tank are arranged in the first water tank. Sewage pump, the submersible sewage pump is connected with the jet aerator through a water pipe, the jet aerator is connected with the second water tank through a water pipe, and the first water tank is used to undertake the overflow from the three anaerobic treatment units. When the water level reaches 0.9m from the bottom of the first water tank, the liquid level controller in the first water tank starts the submersible sewage pump to pump the water to the jet aerator, and the water and air are fully mixed in the jet aerator to achieve reoxygenation. The purpose is to pump it to the second water tank through the water pipe. When the water level is lowered to 0.3m from the bottom of the first water tank, the liquid level controller in the first water tank shuts down the submersible sewage pump and stops pumping. The size of the first water tank is 1.2m×9m×1m.

In this specific embodiment, the upper end surface of the second water tank 62 is provided with a plurality of evenly distributed water outlets and the bottom of the vertical submerged-flow constructed wetland 54 is connected to the water inlet.

In this way, the second water tank can isolate the anaerobic area below to ensure its anaerobic environment effect, make the air intake and liquid fully mix to ensure the subsequent aerobic treatment effect, and evenly distribute water to the upper vertical submerged constructed wetland to reduce water flow Multiple functions such as impact on plant roots. When the sewage flows from the second water tank to the vertical subsurface constructed wetland during work, the upper end face of the second water tank is provided with a plurality of evenly distributed water outlets, so that the sewage can enter the vertical subsurface constructed wetland more evenly and improve the vertical subsurface constructed wetland. processing effect.

In this specific embodiment, the vertical subsurface constructed wetland 54 includes a vertical subsurface constructed wetland unit 64, a vertical subsurface constructed wetland unit 65, and a vertical subsurface constructed wetland, which are independent of each other and are arranged side by side in the horizontal direction. Three units 66, the lower end of the vertical submerged constructed wetland unit is provided with a bottom overflow hole and is connected to the water outlet end of the second water tank; the upper end of the vertical subsurface constructed wetland unit is the water outlet end and is connected with the vertical submerged flow constructed wetland The upper end of the second unit is connected to the water inlet The lower end of the second unit of the vertical subsurface flow constructed wetland is the water outlet end and is connected to the water inlet end of the lower end of the third unit of the vertical subsurface flow constructed wetland;

In this way, the vertical subsurface flow constructed wetland is set up into a vertical subsurface constructed wetland unit, a vertical subsurface constructed wetland unit two, and a vertical subsurface constructed wetland unit three, which can specifically treat the pollutants in the sewage and improve the sewage treatment. quality. Specifically, the sewage enters the second water tank for aeration and reoxygenation after being denitrified by the anaerobic treatment unit. Sewage mixed with air and enriched with oxygen enters the vertical subsurface constructed wetland, and then goes up and down in turn and passes through the three units of the vertical subsurface constructed wetland. The vertical subsurface constructed wetland is filled with the structure of plant roots, and It is conducive to the implantation and reproduction of water treatment microorganisms in the filler and plant roots. In this way, the sewage flows through a long path in the vertical submerged constructed wetland. When the sewage first enters the area, it is an aerobic treatment area with high oxygen content, and the microbial aerobic bacteria with high oxygen demand conduct biological filtration. At the same time, combined with fillers Filtration and plant root uptake improve treatment efficiency. Then, as the sewage continues to flow in the vertical subsurface constructed wetland, the oxygen content in the sewage gradually decreases, so the water treatment environment gradually transitions from aerobic to anoxic along the sewage flow path, and the implanted bacteria in the filler are also replaced by aerobic bacteria. (Vertical subsurface flow constructed wetland unit 1) gradually changed to micro-aerobic bacteria or facultative aerobic bacteria with lower oxygen demand (vertical subsurface flow constructed wetland unit two) to anaerobic bacteria (vertical subsurface flow constructed wetland unit three). The structure of such three vertical submerged constructed wetland units can greatly enrich the water treatment environment with different oxygen demands; at the same time, combined with the anaerobic treatment units in the previous treatment process, the sewage can form anaerobic treatment-aerobic treatment in sequence macroscopically. Treatment - anaerobic treatment, forming a macro treatment process of denitrification - nitrification - denitrification, which meets the needs of organic matter degradation. Combined with the absorption and transformation of plant roots, the water treatment effect is greatly improved.

In the specific implementation, vertical fourth and fifth partitions are arranged at horizontal intervals in the vertical subsurface constructed wetland, and the vertical subsurface constructed wetland is divided into a unit of the vertical subsurface constructed wetland which is independent of each other, the vertical subsurface The second unit of the vertical subsurface constructed wetland and the third unit of the vertical subsurface constructed wetland, the sewage enters the second water tank evenly from the overflow hole at the bottom of the first unit of the vertical subsurface constructed wetland. The size of the second water tank is 1.2m×9m×0.3m. The first unit of the vertical subsurface constructed wetland flows through the filler from bottom to top through the permeable holes on the fourth partition to the second unit of the vertical subsurface constructed wetland. The permeable holes on the fifth clapboard reach the third unit of the vertical subsurface constructed wetland. The packing specifications and thicknesses in the first unit of the vertical subsurface constructed wetland, the second unit of the vertical subsurface constructed wetland and the third unit of the vertical subsurface constructed wetland are the same, and the bottom is Cobblestones with a particle size of 0.03-0.05m and a thickness of 0.2m; the upper part is melon seeds with a particle size of 0.003-0.01m and a thickness of 0.1m; the middle part is pebbles with a particle size of 0.01-0.03m, with a thickness of 0.7m, and the porosity of the filler matrix is 0.25-0.35. In order to prevent the leakage of the filler, geotextiles are laid on each layer, and windmill grass is planted in the three units. The size of the vertical subsurface constructed wetland is 3.6m×9m×1.2m. The vertical subsurface constructed wetland is evenly divided into three units. The hydraulic retention time of the water flow in the vertical subsurface constructed wetland is about 24h. The pollutants in the sewage undergo adsorption, retention, filtration, redox, precipitation, microbial decomposition, transformation, plant shading, residue accumulation, transpiration moisture and nutrient absorption to achieve purification effects. The vertical subsurface constructed wetland system can form an aerobic water environment in the front, facultative anaerobic in the middle, and anaerobic in the rear. This coexistence of aerobic and anaerobic conditions provides different suitable niches for aerobic, facultative anaerobic and anaerobic microorganisms in the root zone, which will surely promote the degradation and transformation of pollutants, especially in the process of sewage denitrification. The nitrification and denitrification of the vertical flow constructed wetland system play a unique role in sewage treatment. The filler layer and the root system of plants can absorb and absorb the total phosphorus in the water.

In this specific embodiment, it also includes a re-oxygenation tank 67 arranged between the vertical subsurface-flow type constructed wetland 54 and the horizontal sub-flow-type constructed wetland 55, and the water inlet end of the re-oxygenation tank is located below the water outlet end of the vertical subsurface flow type constructed wetland and the other A distance is formed between the water outlet end of the vertical subsurface flow type constructed wetland for water drop, and the water outlet end of the reoxygenation tank is connected to the water inlet end of the horizontal subsurface flow type constructed wetland.

In this way, the water at the outlet end of the vertical subsurface constructed wetland can be more fully mixed with the air when it falls in the shape of a water curtain, and then enter the re-oxygenation tank, and can form a thin layer of water flow in the re-oxygenation tank, and the atmospheric re-oxygenation is faster. And the re-oxygenation tank re-oxygenates the water flow again, so that it can better improve the treatment effect after it enters the horizontal subsurface-flow constructed wetland.

In this embodiment, the water outlet end of the re-oxygenation tank and the water inlet end of the horizontal subsurface flow constructed wetland are located in the middle position in the height direction of one side of the horizontal subsurface flow constructed wetland, and the water outlet end of the horizontal subsurface flow constructed wetland is located at the horizontal subsurface flow constructed wetland. The upper end position in the height direction on the other side of the area.

In this way, the water flow after supplementing oxygen through the re-oxygenation tank enters from the middle of the horizontal subsurface constructed wetland, so that the lower part of the horizontal subsurface constructed wetland is an area with poor water fluidity and is conducive to the implantation of anaerobic and immobile bacteria. In contrast, the middle and upper parts of the horizontal subsurface constructed wetland are aerobic areas, and the overall mobility of the horizontal subsurface constructed wetland is relatively slow. Therefore, aerobic and anaerobic alternate treatment areas can be formed again in the horizontal subsurface constructed wetland, and the implantation environment provided by the water treatment bacteria in each area is generally different from that of the vertical subsurface artificial wetland due to the slow fluidity of the water body. Wetlands can form more abundant suitable niches for more types of aerobic, facultative anaerobic and anaerobic microorganisms in plant roots and fillers. Therefore, the setting of horizontal subsurface constructed wetland can further improve the overall water treatment effect of the system and improve the quality of sewage treatment. At the same time, in the horizontal subsurface-flow constructed wetland, after the water flow speed becomes slow, it can form the subsidence again before the water is discharged, which ensures the clarity of the water.

Specifically, in this embodiment, the vertical height of the re-oxygenation tank from the upper end of the vertical subsurface constructed wetland (the water outlet at the upper end of the third unit of the vertical subsurface constructed wetland) is 0.3m. It is more fully mixed with the air, and a thin layer of water flow of 4-5mm is formed in the re-oxygenation tank, and the atmospheric re-oxygenation is faster. The water inlet holes are evenly distributed at the water inlet end of the re-oxygenation tank near the middle of one side of the horizontal subsurface constructed wetland. The water flow is evenly distributed to the horizontal subsurface constructed wetland. The horizontal subsurface-flow constructed wetland packing layers are, from bottom to top, large gravel with a particle size of 0.06-0.09m and a thickness of 0.25m; small gravel with a particle size of 0.02-0.04m and a thickness of 0.2m; particle size of 0.01-0.02m Crushed stone chips, thickness of 0.15m; particle size of 0.01-0.02m zeolite-supported copper oxide, thickness of 0.1m; filler matrix porosity of 0.25-0.35. Windmill grass can be planted inside. The size of the horizontal subsurface constructed wetland is 1.2m×9m×0.8m, and the hydraulic retention time of the water flow in the horizontal subsurface constructed wetland is about 10.5h. The horizontal subsurface constructed wetland is used to further form an environment where aerobic and anaerobic conditions coexist. It provides different suitable niches for aerobic, facultative anaerobic and anaerobic microorganisms in the root zone. Combined with the filler layer and the root system of plants, the total phosphorus in the water can be adsorbed and absorbed respectively, which further improves the water treatment effect.

In this embodiment, a layer of antibacterial filler zeolite with zeolite-supported copper oxide is spread on the top layer of the filler in the horizontal subsurface flow constructed wetland. When the water flows through, SS is removed by antibacterial filler filtration, and the zeolite can further remove phosphorus in sewage, and at the same time efficiently kill pathogenic bacteria for disinfection.

In this specific embodiment, it also includes a post-processing unit 79 connected to the water flow at the water outlet end of the horizontal submerged artificial wetness type. The water outlet end of the post-processing unit is connected with the drainage pipe to form a water outlet end; .

In this way, by installing activated carbon in the post-processing unit, the activated carbon adsorbs and removes impurities in the water when the water flows through the post-processing unit, so that the effluent is clean and clear, and then discharged through the drain pipe connected to the water outlet of the post-processing unit.

During specific implementation, the post-processing unit adopts the following preferred parameters, the size of which is 1.2m×1.2m×0.7m, and the porosity of the activated carbon in the post-processing unit is 0.25-0.35.

In this specific embodiment, the feed solid-liquid separation unit 51 includes a solid-liquid separation pipe 68 disposed obliquely, a feces collection tank 69 is disposed below the solid-liquid separation pipe, and the upper end of the solid-liquid separation pipe is open obliquely upward and is straight For the connection below the discharge end of the sewage inlet pipe, the lower end of the solid-liquid separation pipe is provided with an end separation grid to form a water outlet, and a water collecting bucket 70 is connected under the lower end of the corresponding solid-liquid separation pipe; the upper end of the water collecting bucket is suspended on the first rope The lower end 71, the other end of the first rope bypasses the first fixed pulley 72 located above the water collecting bucket and the second fixed pulley 73 located at the upper end of the solid-liquid separation pipe, and then connects downward to the upper end of the solid-liquid separation pipe; the lower end of the water collecting bucket is provided with The water outlet hole is provided with an automatic water outlet control device 74 that can control the water outlet at intervals. The lower end of the solid-liquid separation pipe is connected to the lower end of the vertical second rope 75 and is rotatably positioned on the feed solid. In the liquid separation unit; so that when a certain amount of solid components is accumulated in the solid-liquid separation tube, the upper end can rotate downward under the action of its own weight, and the water collecting bucket after the water is pulled up through the first rope, and the upper end of the solid-liquid separation tube Rotate down to an oblique downward state and slide the accumulated solid components out of the open end to the fecal collection tank below. The upper end of the separation pipe is pulled back to the upwardly inclined state; the feed solid-liquid separation unit is also provided with a vertical third rope 76, and the lower end of the third rope is connected to the water collecting bucket and is used to limit the water collecting bucket down to the limit position.

In this way, when the feed solid-liquid separation unit is in operation, the domestic sewage is collected and flows through the sewage inlet pipe, flows out from the outlet end of the sewage inlet pipe, and flows in from the open upper end of the solid-liquid separation pipe. After the domestic sewage flows into the solid-liquid separation tube, the solid-liquid separation tube intercepts the solid components in the domestic sewage and accumulates in the solid-liquid separation tube, and the liquid components in the domestic sewage flow out from the water outlet formed at the lower end of the solid-liquid separation tube and are collected. in the collection bucket. When a certain amount of solid components is accumulated in the solid-liquid separation pipe, the sewage collected in the water collecting bucket reaches a certain amount, and the automatic water outlet control device set at the water outlet controls the water outlet from the water outlet. After the sewage in the collecting bucket is emptied or released to a certain amount, and at the same time, the solid components in the solid-liquid separation tube accumulate to a certain amount, so that the two ends of the first rope are out of balance, the upper end of the solid-liquid separation tube can rotate downwards under the action of its own weight. Pull up the water collecting bucket after the water comes out through the first rope, and turn the upper end of the solid-liquid separation pipe downward to a state of oblique downward, and slide the accumulated solid components from the opening of the end to the fecal collection tank below . After the solid components in the solid-liquid separation tube slide out, the water collecting bucket can pull the upper end of the solid-liquid separation tube back to the upwardly inclined state through the first rope, so that the two ends of the first rope return to the original equilibrium state. Such a structure enables the solid-liquid separation tube to continuously adjust the solid-liquid separation tube until the solid-liquid separation tube slides out the collected solid components from the open end to the fecal collection tank below after the domestic sewage enters the solid-liquid separation tube. The solid-liquid separation of the domestic sewage entering into it is carried out continuously, which can better separate the sludge and manure in the domestic sewage of the village and improve the quality of sewage treatment.

In the specific implementation, the solid-liquid separation unit of the feeding material can also be directly set with an oblique grille, so that the waste to be treated falls on the grille and slowly slides down. During the sliding process, the liquid flows along the grille. Filter to the bottom of the grid, and the solid part slides out to the front with the grid, thereby realizing solid-liquid separation. The solid-liquid separation unit has a simpler structure and lower cost. However, in specific use, the residence time of the waste on the grid cannot be controlled, which often causes the liquid to slide down the grid together with the solid part before being filtered out in a very short time. This results in poor solid-liquid separation and difficult to control. When the above-mentioned solid-liquid separation unit is used, the solid part can stay in the solid-liquid separation tube and slowly filter out the liquid part, so it has a very good solid-liquid separation effect.

In this specific embodiment, the lower part of the solid-liquid separation tube is provided with an internal separation grid along the axial direction, so that the upper part of the separation grid forms a solid part accumulation space 77 , and the lower part of the separation grid forms a sewage gathering space 78 .

In this way, after the domestic sewage waste (mainly feces) flows into the solid-liquid separation pipe, the waste first enters the solid part accumulation space formed on the upper part of the separation grid in the solid-liquid separation pipe. The part and the liquid part are separated, and the liquid part enters the lower part of the separation grid to form a sewage gathering space, and flows out from the outlet end of the solid-liquid separation pipe. In this way, solid-liquid separation can be performed immediately after the waste falls into the solid-liquid separation tube, so the solid-liquid separation efficiency of the solid-liquid separation tube can be improved, and the quality of solid-liquid separation can be improved.

In this specific embodiment, the inner cavity of the solid-liquid separation tube and the surface of the separation grid are coated with non-sticky material. (preferably coated with nanomaterials).

In this way, during the solid-liquid separation, the solid part and the liquid part can be better separated, and when the solid part is poured from the solid-liquid separation tube to the feces collection tank, the solid part is not easy to adhere to the inner cavity of the solid-liquid separation tube. It has the advantage of more convenient realization of solid-liquid separation.

In this specific embodiment, a vertical guide sliding fit structure can be added between the two sides of the water collecting bucket 70 and the inner cavity wall of the solid-liquid separation unit of the feed.

In this way, a vertical guide sliding fitting structure is added between the two sides of the water collecting bucket and the inner cavity wall of the solid-liquid separation unit, so that the upper end of the solid-liquid separation pipe is rotated downward and the water collecting bucket after water is pulled up through the first rope. And when the water collecting bucket moves vertically downward and the upper end of the solid-liquid separation pipe is pulled back to the upwardly inclined state through the first rope, the vertical running of the water collecting bucket is more stable.

In this specific embodiment, the automatic water outlet control device 74 is a water tank provided corresponding to the water outlet holes and is used to control the water outlet from the water outlet holes at intervals.

In this way, the automatic water outlet control device is set as the existing water tank, which has the advantages of simple structure and convenient installation and use.

In this specific embodiment, the water inlet channel 80 is provided at the position corresponding to the water outlet hole at the lower end of the water collecting bucket. The water inlet channel has a flat box structure as a whole, and the upper end and one side of the water inlet channel are open structures, and the open side of the water inlet channel forms the water outlet end, and the upper end of the water inlet channel is formed. It is communicated with the water outlet at the lower end of the collecting bucket.

In this way, a water inlet channel is provided at the position of the water outlet hole at the lower end of the water collecting bucket, and the open side of the water inlet channel forms a water outlet end and is used to connect with the water inlet end of the anaerobic treatment unit, which has the advantage of making the sewage enter the anaerobic treatment unit more uniformly.

The invention also discloses a domestic sewage treatment method suitable for villages, which is characterized in that it comprises the following steps: a firstly realize the solid-liquid separation of the domestic sewage, collect and process the separated solid part separately, and separate the separated liquid sewage Part of the follow-up purification treatment; b. The liquid sewage is sequentially subjected to intermittent anaerobic decomposition, aeration and oxygenation, absorption by plant roots combined with vertical subsurface flow and horizontal subsurface flow to achieve aerobic and anaerobic composite decomposition, and finally through the filler. The zeolite-loaded copper oxide is sterilized and the pathogenic bacteria in the sewage are eliminated, and then flows into the post-treatment unit.

In this way, using the above method to treat domestic sewage has the advantages of better sewage treatment quality and higher treatment efficiency.

In this specific embodiment, the method is implemented by using the integrated processing system with the above structure.

In this way, the implementation of the integrated treatment system with the above structure has the advantages of improving the quality of sewage treatment, improving the sewage treatment capacity, and being able to better separate the sludge and feces in the domestic sewage of the village.

To sum up, the beneficial effects of the present invention are as follows: realizing the diversion of feces, returning feces to the fields, reuse of reclaimed water, and synergistic removal of pollutants, and achieving good treatment effects under low-cost conditions; damage to protect the environment. The present invention uses the manure separation unit (and the aforementioned solid-liquid separation unit) to divert the manure to realize resource utilization, so that the manure enters the manure collection tank, and the sewage enters the anaerobic treatment unit; Under the action of anaerobic bacteria, complex organic matter is degraded and converted into simple organic matter, and energy is released at the same time; the oxygen environment in the wetland is poor, and the constructed wetland is still not enough to meet the requirements of organic matter and ammonia nitrogen when dealing with high-concentration sewage. Therefore, in the present invention, the effluent of the anaerobic unit is aerated and re-oxygenated by the jet aerator and the effluent of the vertical submerged constructed wetland is re-oxygenated by dropping the water to the re-oxygenation tank to solve the problem of the artificial wetland bed supply. The problem of insufficient oxygen; the biofilm on the constructed wetland filter material degrades the pollutants in the sewage, and there are a large number of plant roots, microorganisms and soil minerals in the upper soil to absorb, degrade and replace the pollutants in the sewage. Physical, chemical and biological effects , to achieve the purpose of purifying sewage; the top filler of the horizontal submerged constructed wetland is an antibacterial filler zeolite loaded with copper oxide, and the antibacterial filler will filter to remove SS when the water flows through. Activated carbon is installed in the post-processing unit, and the activated carbon adsorbs and removes impurities in the water when the water flows through the post-processing unit, so that the effluent is clean and clear; Sewage discharge standards. The invention has broad application prospects in the vast rural areas of our country.

In practical application of the above processing system, the specifications of each unit can be determined by the following calculation formula:

Anaerobic treatment unit area calculation:

in:

A is the area of the anaerobic treatment unit, Q is the design flow,

C ₀ is the influent BOD, mg/L,

C ₁ is effluent BOD, mg/L,

q _os is the surface organic load kg/m ₂ ·d, which can be selected according to the specification.

Calculation of hydraulic retention time:

Where: t is the hydraulic retention time, Q is the design flow,

V is the volume of filler in the anaerobic treatment unit,

ε is the porosity.

Surface Hydraulic Load Calculation:

Where: q _hs is the surface hydraulic load, Q is the design flow,

A is the area of the anaerobic treatment unit.

Calculation of vertical subsurface constructed wetland area:

Among them: A is the vertical subsurface flow constructed wetland area, Q is the design flow,

C ₀ is the influent BOD, mg/L,

C ₁ is effluent BOD, mg/L,

q _os is the surface organic load kg/m ² ·d, which can be selected according to the specification.

Calculation of hydraulic retention time:

where: t is the hydraulic retention time,

Q is the design flow,

V is the volume of the matrix in the vertical subsurface constructed wetland,

ε is the porosity.

Surface Hydraulic Load Calculation:

Where: q _hs is the surface hydraulic load, Q is the design flow,

A is the area of vertical subsurface constructed wetland.

Area calculation of horizontal subsurface constructed wetland:

Among them: A is the area of horizontal subsurface constructed wetland,

Q is the design flow,

C ₀ is the influent BOD, mg/L,

C ₁ is effluent BOD, mg/L,

q _os is the surface organic load kg/m ₂ ·d, which can be selected according to the specification.

Calculation of hydraulic retention time:

Where: t is the hydraulic retention time, Q is the design flow,

V is the volume of the substrate in the horizontal subsurface constructed wetland,

ε is the porosity.

Surface Hydraulic Load Calculation:

where: q _hs is the surface hydraulic load,

Q is the design flow,

A is the area of vertical subsurface constructed wetland.

The post-processing unit is equipped with activated carbon, and when the water flows through the post-processing unit, the activated carbon adsorbs and removes impurities in the water, so that the effluent is clean and clear, and finally the effluent is discharged through a drain pipe.

Post-processing unit size calculation:

Where: V is the volume of the matrix filler in the post-processing unit,

t is the hydraulic retention time,

Q is the design flow,

ε is the porosity.

Claims (7)

1. An integrated domestic sewage treatment system suitable for villages, including a solid-liquid separation unit (51) for feeding, and a feeding port is provided on the solid-liquid separation unit for connecting to a sewage water inlet pipe (52); its features are: In that, an anaerobic treatment unit (53) is provided at the lower part of one side of the feed solid-liquid separation unit, and the water inlet end of the anaerobic treatment unit is connected with the water outlet end of the feed solid-liquid separation unit, and inside the anaerobic treatment unit Filling is provided; just above the anaerobic treatment unit, there are vertical subsurface flow constructed wetlands (54) and horizontal subsurface constructed wetlands (55), and the vertical subsurface constructed wetlands (54) and the horizontal subsurface constructed wetlands (55) are respectively built-in There are fillers and plants are planted, and the outlet end of the anaerobic treatment unit and the inlet end of the vertical subsurface flow constructed wetland are connected through a pipeline and a suction device (56) arranged on the pipeline, and the outlet end of the vertical subsurface flow constructed wetland is connected with the suction device (56). The water inlet end of the horizontal subsurface flow constructed wetland is connected, and the water outlet end is provided on the horizontal subsurface constructed wetland for water outlet; The suction device (56) is a submersible sewage pump; A first water tank (60) is provided on one side of the anaerobic treatment unit, and a vertical third partition plate is arranged between the first water tank and the third anaerobic treatment unit, and the lower end is separated from the lower end surface of the anaerobic treatment unit , a first grid is arranged between the third baffle and the bottom of the anaerobic treatment unit, so that the water inlet end of the first water tank is connected to the water outlet end of the anaerobic treatment unit; the submerged sewage is arranged at the bottom of the first water tank The pump, a liquid level detection probe (61) is arranged on the side wall of the first water tank, the liquid level detection probe is connected with the electric control end of the submersible sewage pump and is used to control the start and stop of the submersible sewage pump according to whether the detected liquid level reaches; A second water tank (62) is spaced above the water tank, and a jet aerator (63) is arranged between the first water tank and the second water tank; the jet aerator has an inlet connected to the water outlet of the submersible sewage pump The liquid pipeline also has an air intake pipeline that communicates with the outside air, and a jet outlet pipeline that communicates with the second water tank; the water outlet end of the second water tank is upwardly connected to the vertical submerged constructed wetland; The upper end surface of the second water tank (62) is provided with a plurality of evenly distributed water outlets and the bottom of the vertical submerged flow constructed wetland (54) is connected to the water inlet; The feed solid-liquid separation unit (51) includes a solid-liquid separation pipe (68) arranged obliquely, a feces collection tank (69) is arranged below the solid-liquid separation pipe, and the upper end of the solid-liquid separation pipe is open obliquely upward and is straight. For the connection below the discharge end of the sewage inlet pipe, the lower end of the solid-liquid separation pipe is provided with an end separation grid to form a water outlet, and a water collecting bucket (70) is connected below the lower end of the corresponding solid-liquid separation pipe; A lower end of a rope (71), the other end of the first rope bypasses the first fixed pulley (72) located above the water collecting bucket and the second fixed pulley (73) located at the upper end of the solid-liquid separation pipe, and then goes down to the solid-liquid separation pipe The upper end is connected; the lower end of the water collecting bucket is provided with a water outlet hole, and the water outlet hole is provided with an automatic water outlet control device (74) capable of controlling the water outlet at intervals, and the lower end of the solid-liquid separation pipe passes through the lower end of the vertical second rope (75). connected and rotatably positioned in the feed solid-liquid separation unit; so that when a certain amount of solid components is accumulated in the solid-liquid separation tube, the upper end can rotate downward under the action of its own weight, and the water collecting bucket after water is discharged through the first rope Pull up, and make the upper end of the solid-liquid separation tube turn downward to an oblique downward state, and slide the accumulated solid components from the open end to the fecal collection tank below, and the solid components in the solid-liquid separation tube slide out. After that, the water collecting bucket can pull the upper end of the solid-liquid separation pipe back to the upwardly inclined state through the first rope; there is also a third vertical rope (76) in the feeding solid-liquid separation unit, and the lower end of the third rope is connected to the water collecting bucket. Connected and used to limit the water collection bucket down to the limit position. 2 . The integrated domestic sewage treatment system suitable for a village according to claim 1 , wherein the anaerobic treatment unit ( 53 ) comprises an anaerobic treatment unit spaced from each other and arranged side by side in the horizontal direction. 3 . (57), the second unit of anaerobic treatment (58) and the third unit of anaerobic treatment (59); the upper end of the first unit of anaerobic treatment is the inlet end and is connected to the outlet end of the solid-liquid separation unit of the feed, and the lower end of the first unit of anaerobic treatment It is the water outlet end and is connected to the water inlet end of the lower end of the second unit of anaerobic treatment, the upper end of the second unit of anaerobic treatment is the water outlet end and is connected to the water inlet end of the upper end of the third unit of anaerobic treatment, and the lower end of the third unit of anaerobic treatment is the water outlet end and Connected to the water inlet end of the suction device. 3 . The integrated domestic sewage treatment system suitable for villages according to claim 1 , wherein the vertical underflow constructed wetland ( 54 ) comprises vertical underflow types that are independent of each other and are arranged side by side in the horizontal direction. 4 . Constructed wetland unit 1 (64), vertical subsurface constructed wetland unit 2 (65) and vertical subsurface constructed wetland unit 3 (66), the lower end of vertical subsurface constructed wetland unit 1 is provided with a bottom overflow hole and is connected to the outlet end of the second water tank Connected; the upper end of the vertical subsurface constructed wetland unit 1 is the water outlet and is connected to the water inlet end of the upper end of the vertical subsurface constructed wetland unit 2. The lower end of the vertical subsurface constructed wetland unit 2 is the water outlet and is connected to the vertical subsurface constructed wetland unit 3. The water inlet end of the lower end is connected; and the three units of the vertical subsurface flow constructed wetland are connected to the water inlet end of the horizontal subsurface flow constructed wetland. 4. The integrated treatment system for domestic sewage suitable for villages according to claim 1, characterized in that: further comprising: a re-oxygenation device arranged between the vertical subsurface flow constructed wetland (54) and the horizontal subsurface constructed wetland (55). Tank (67), the water inlet end of the reoxygenation tank is located below the water outlet end of the vertical subsurface flow type constructed wetland, and there is a distance between the two for the water drop at the outlet end of the vertical subsurface flow type constructed wetland. The inlet end of the constructed wetland is connected. 5. The integrated domestic sewage treatment system suitable for villages according to claim 1, characterized in that: a layer of antibacterial filler of zeolite-loaded copper oxide is spread on the top layer of the filler in the horizontal subsurface-flow constructed wetland. 6 . The integrated domestic sewage treatment system suitable for villages according to claim 1 , wherein the lower part of the solid-liquid separation pipe is provided with an internal separation grid along the axial direction, so that the upper part of the separation grid forms a solid part accumulation space. 7 . (77), a sewage gathering space (78) is formed in the lower part of the separation grid; A vertical guide sliding fit structure can be added between the two sides of the water collecting bucket (70) and the inner cavity wall of the solid-liquid separation unit of the feed. 7. A method for treating domestic sewage that is applicable to a village, is characterized in that, this method adopts the integrated treatment system according to any one of claims 1-6 to realize, comprising the following steps, a first realizes domestic sewage The separated solid part is collected and processed separately, and the separated liquid sewage part is subjected to subsequent purification treatment; b. The liquid sewage is sequentially subjected to intermittent anaerobic decomposition, aeration and oxygenation, and the use of plant roots to absorb and combine. The vertical subsurface flow mode and the horizontal subsurface flow realize the composite decomposition of aerobic and anaerobic methods. Finally, the filler zeolite-loaded copper oxide is sterilized and the pathogenic bacteria in the sewage are eliminated.

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