CN113860658A - Rural domestic sewage treatment system - Google Patents

Rural domestic sewage treatment system Download PDF

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Publication number
CN113860658A
CN113860658A CN202111281444.3A CN202111281444A CN113860658A CN 113860658 A CN113860658 A CN 113860658A CN 202111281444 A CN202111281444 A CN 202111281444A CN 113860658 A CN113860658 A CN 113860658A
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CN
China
Prior art keywords
water storage
percolation
gravel layer
water
domestic sewage
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Pending
Application number
CN202111281444.3A
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Chinese (zh)
Inventor
高东东
肖杰
董坤
周安澜
郭明昆
罗怡文
周文波
杨长军
李金星
张珅
陈亚平
苏蓉
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SICHUAN ACADEMY OF ENVIRONMENTAL SCIENCES
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SICHUAN ACADEMY OF ENVIRONMENTAL SCIENCES
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Priority to CN202111281444.3A priority Critical patent/CN113860658A/en
Publication of CN113860658A publication Critical patent/CN113860658A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water

Abstract

The invention relates to a rural domestic sewage treatment system, which comprises a water storage module and a percolation module; a water storage cavity is arranged in the water storage module, the water storage module is provided with a first water inlet and a first water outlet, and the first water inlet is higher than the first water outlet; a percolation cavity is arranged in the percolation module, the percolation module is provided with a second water inlet and a second water outlet, the second water inlet is higher than or equal to the second water outlet, and the second water inlet is communicated with the first water outlet and has the same height; the infiltration intracavity is equipped with the infiltration structure that supplies sewage to pass, and the infiltration structure includes first perforated plate, multistage infiltration layer and second perforated plate, and multistage infiltration layer includes quartz sand gravel layer, first grist gravel layer and second grist gravel layer, and the average particle size on second grist gravel layer is greater than the average particle size on first grist gravel layer, and the average particle size on first grist gravel layer is greater than the average particle size on quartz sand gravel layer. The invention effectively solves the problems of poor harmless effect and poor sanitary condition of rural domestic sewage treatment.

Description

Rural domestic sewage treatment system
Technical Field
The invention relates to rain for domestic sewage treatment, in particular to a rural domestic sewage treatment system.
Background
Most of the existing rural integrated domestic sewage treatment equipment or the three-format septic tank are integrated in one tank body, the integrated equipment is often unattended and maintained after installation, the integrated equipment is a customized product and is difficult to meet topographic conditions, and the three-format septic tank has the problems of poor harmless effect, poor sanitary conditions and the like. Rural domestic sewage has the characteristics of collection dispersion, concentrated discharge time period and the like, after a dry latrine is changed into a water latrine, the existing three-format septic tank is always operated fully or in an overload mode, so that the harmless treatment effect is poor, the sewage discharge amount is increased and the like, greater pollution is caused, even a black and odorous water body is formed, in order to meet local conditions, the three-format septic tank can better exert the efficiency, the problems of scattered discharge, poor effect, insufficient resource, pollution risk and the like of rural domestic sewage treatment are effectively solved, and the rural domestic sewage treatment and operation and maintenance difficulty is practically solved.
Disclosure of Invention
The invention aims to provide a rural domestic sewage treatment system to solve the problems of poor harmless effect and poor sanitary condition of rural domestic sewage treatment.
The rural domestic sewage treatment system comprises a water storage module and a percolation module which are sequentially arranged from front to back; a water storage cavity is arranged in the water storage module, a first water inlet communicated with the water storage cavity is formed in the front part of the water storage module, a first water outlet communicated with the water storage cavity is formed in the rear part of the water storage module, and the first water inlet is higher than the first water outlet; a percolation chamber is arranged in the percolation module, a second water inlet communicated with the percolation chamber is arranged at the front part of the percolation module, a second water outlet communicated with the percolation chamber is arranged at the rear part of the percolation module, the second water inlet is higher than or equal to the second water outlet, and the second water inlet is communicated with the first water outlet and has the same height; the infiltration intracavity is equipped with the filtration structure that supplies sewage to pass, the filtration structure includes first perforated plate, multistage infiltration layer and the second perforated plate that sets gradually backward in the past, multistage infiltration layer includes quartzy gritty bed, first grittite gravel layer and the second grittite gravel layer that sets gradually backward in the past, the average particle size on second grittite gravel layer is greater than the average particle size on first grittite gravel layer, the average particle size on first grittite gravel layer is greater than the average particle size on quartzy gritty bed.
Further, the multistage percolation layer still includes establishes third limestone gravel layer behind the second limestone gravel layer, the average particle size on third limestone gravel layer is greater than the average particle size on second limestone gravel layer.
Further, the multistage percolation layer still includes establishes fourth limestone gravel layer behind the third limestone gravel layer, the average particle size on fourth limestone gravel layer is greater than the average particle size on third limestone gravel layer.
Further, an aeration system is arranged in the multi-stage percolation layer.
Further, aeration systems includes the aeration pipe that length extends along the fore-and-aft direction, the axial and the circumference of aeration pipe all are provided with a plurality of aeration holes, the infiltration module still includes the aeration connecting pipe of vertical setting, the rear end of aeration pipe with the aeration connecting pipe is linked together, the upper end of aeration connecting pipe runs through the cavity wall in infiltration chamber and outwards stretches out.
Further, the bottom in water storage chamber is equipped with the sludge impoundment that is used for deposiing mud, the preceding lateral wall of sludge impoundment with the preceding chamber wall in water storage chamber links to each other, the back wall of sludge impoundment is inclined from bottom to top gradually backward, the back wall of sludge impoundment with the back chamber wall in water storage chamber links to each other.
Further, the water storage module further comprises a sewage cleaning opening communicated with the inside and the outside of the water storage cavity and a sewage cleaning cover for opening/closing the sewage cleaning opening.
Furthermore, a serrated plate is arranged in the water storage cavity and positioned in front of the first water outlet and perpendicular to the water flow direction, sawteeth of the serrated plate are horizontally arranged, peaks of the serrated plate are upwards arranged, and valleys of the serrated plate are higher than the lower edge of the first water outlet.
Further, the water storage module further comprises an exhaust hole communicated with the inside and the outside of the water storage cavity and an exhaust cover for opening/closing the exhaust hole.
Further, the tank bottom of the sludge tank is provided with a sludge discharge hole communicated with the inside and the outside of the water storage cavity, and the tank bottom of the sludge tank is also provided with a sludge discharge hole cover used for realizing opening/closing of the sludge discharge hole.
The invention has the advantages that through the infiltration structure from the thin to the thick quartz sand gravel layer, the first limestone gravel layer and the second limestone gravel layer, the structure ensures that large-volume impurities in the domestic sewage are not easy to pass through the infiltration structure to form secondary sedimentation and is beneficial to the anaerobic fermentation of the domestic sewage, so that the impurities, germs and parasitic ova contained in the domestic sewage are basically eliminated after the domestic sewage passes through the infiltration structure; meanwhile, the multistage percolation layer selects gravels containing limestone materials, experiments show that the removal rate of the limestone gravels to pollution indexes is increased, although chemical precipitates generated by reaction of the limestone and total phosphorus are attached to the inside of pores to cause reduction of matrix permeability, the limestone gravel active materials and sewage generate corrosion action, the surface of the gravels forms corrosion to generate corrosion grooves, the void space of the whole structure is enlarged to a certain extent, the system is favorable for achieving corrosion-blockage dynamic balance, and negative effects brought by chemical precipitates are effectively reduced. An aeration system is arranged in the multi-stage percolation layer. The experimental result shows that if the aeration system is used in the percolation structure, domestic sewage is subjected to contact oxidation in the percolation structure, the multistage percolation layers with the grain sizes ranging from thin to thick along the water flow direction can generate a superposition effect, and the action strength on nitrogen and phosphorus is higher than that of a single graded substrate; experiments show that the removal rates of the contact oxidation multistage percolation layer structure with the reverse rhythm on COD, TN, NH3-N and TP are respectively 15.1-18.5%, 2.1-5.5%, 28.3-32.7% and 40.2-45.2%, and especially the removal effect on total phosphorus is better.
Drawings
FIG. 1 is a schematic structural diagram of a rural domestic sewage treatment system according to the present invention;
FIG. 2 is a schematic view of the structure of part A in FIG. 1;
FIG. 3 is a schematic view of the structure of the portion B in FIG. 1;
FIG. 4 is a resource utilization flow chart of the rural domestic sewage treatment system according to the present invention;
FIG. 5 is a flow chart of a direct discharge mode of the rural domestic sewage treatment system according to the present invention;
in the figure, 1-water storage module, 2-percolation module, 3-water storage cavity, 4-first water inlet, 5-first water outlet, 6-percolation cavity, 7-second water inlet, 8-second water outlet, 9-first perforated plate, 10-second perforated plate, 11-quartz gravel layer, 12-first limestone gravel layer, 13-second limestone gravel layer, 16-aeration pipe, 17-aeration hole, 18-aeration connecting pipe, 19-sludge tank, 20-decontamination port, 21-decontamination cover, 22-sawtooth plate, 23-exhaust hole, 24-exhaust cover, 25-sludge discharge hole.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the rural domestic sewage treatment system comprises a water storage module 1 and a percolation module 2 which are arranged from front to back in sequence; a water storage cavity 3 is arranged in the water storage module 1, a first water inlet 4 communicated with the water storage cavity 3 is arranged at the front part of the water storage module 1, a first water outlet 5 communicated with the water storage cavity 3 is arranged at the rear part of the water storage module 1, and the first water inlet 4 is higher than the first water outlet 5; a percolation chamber 6 is arranged in the percolation module 2, a second water inlet 7 communicated with the percolation chamber 6 is arranged at the front part of the percolation module 2, a second water outlet 8 communicated with the percolation chamber 6 is arranged at the rear part of the percolation module 2, the second water inlet 7 is higher than or equal to the second water outlet 8, and the second water inlet 7 is communicated with the first water outlet 5 and has the same height; the infiltration chamber 6 is provided with an infiltration structure for sewage to pass through, as shown in fig. 1, fig. 2 and fig. 3, the infiltration structure comprises a first perforated plate 9, a multi-stage infiltration layer and a second perforated plate 10 which are sequentially arranged from front to back, the multi-stage infiltration layer comprises a quartz sand gravel layer 11, a first limestone gravel layer 12 and a second limestone gravel layer 13 which are sequentially arranged from front to back, the average particle size of the second limestone gravel layer 13 is larger than that of the first limestone gravel layer 12, and the average particle size of the first limestone gravel layer 12 is larger than that of the quartz sand gravel layer 11. The first water inlet 4 is higher than the first water outlet 5, the second water inlet 7 is flush with the first water outlet 5, the second water outlet 8 is lower than the second water inlet 7, domestic sewage flows through the first water inlet 4, the first water outlet 5, the second water inlet 7 and the second water outlet 8 in sequence, after the domestic sewage enters the water storage cavity 3 through the first water inlet 4, excrement in the domestic sewage is precipitated, the domestic sewage subjected to primary treatment flows into the infiltration cavity 6 through the first water outlet 5 and the second water inlet 7, the infiltration structure in the infiltration cavity 6 comprises a quartz sand gravel layer 11, a first limestone gravel layer 12 and a second limestone gravel layer 13 from thin to thick, and the structure ensures that large-volume impurities in the domestic sewage cannot easily pass through the infiltration structure to form secondary precipitation and is favorable for anaerobic fermentation of the domestic sewage, so that the impurities contained in the domestic sewage after passing through the infiltration structure, The germs and the parasitic ova are basically eliminated; meanwhile, the multistage percolation layer selects gravels containing limestone materials, experiments show that the removal rate of the limestone gravels to pollution indexes is increased, although chemical precipitates generated by reaction of the limestone and total phosphorus are attached to the inside of pores to cause reduction of matrix permeability, the limestone gravel active materials and sewage generate corrosion action, the surface of the gravels forms corrosion to generate corrosion grooves, the void space of the whole structure is enlarged to a certain extent, the system is favorable for achieving corrosion-blockage dynamic balance, and negative effects brought by chemical precipitates are effectively reduced.
Preferably, the multistage percolation layer further includes a third limestone gravel layer disposed behind the second limestone gravel layer 13, the third limestone gravel layer having an average particle size greater than an average particle size of the second limestone gravel layer 13. Preferably, the multi-stage percolation layer further includes a fourth limestone gravel layer disposed behind the third limestone gravel layer, the fourth limestone gravel layer having an average particle size greater than an average particle size of the third limestone gravel layer. The limestone gravel layers are arranged to react with the domestic sewage, so that pollution indexes in the domestic sewage are reduced to a greater extent. In this embodiment, only the quartz gravel layer 11, the first limestone gravel layer 12 and the second limestone gravel layer 13 are provided.
Preferably, an aeration system is arranged in the multi-stage percolation layer. The experimental result shows that if the aeration system is used in the percolation structure, domestic sewage is subjected to contact oxidation in the percolation structure, the multistage percolation layers with the grain sizes ranging from thin to thick along the water flow direction can generate a superposition effect, and the action strength on nitrogen and phosphorus is higher than that of a single graded substrate; experiments show that the removal rates of the contact oxidation multistage percolation layer structure with the reverse rhythm on COD, TN, NH3-N and TP are respectively 15.1-18.5%, 2.1-5.5%, 28.3-32.7% and 40.2-45.2%, and especially the removal effect on total phosphorus is better.
Preferably, the aeration system comprises an aeration pipe 16 with the length extending along the front-back direction, a plurality of aeration holes 17 are formed in the axial direction and the circumferential direction of the aeration pipe 16, the percolation module 2 further comprises an aeration connecting pipe 18 which is vertically arranged, the rear end of the aeration pipe 16 is communicated with the aeration connecting pipe 18, and the upper end of the aeration connecting pipe 18 penetrates through the wall of the percolation cavity 6 and extends outwards. By arranging the aeration pipes 16 with the lengths extending along the front-back direction, the domestic sewage is subjected to contact oxidation from the front to the back, and the removal degree of nitrogen and phosphorus is better. The advantage of this arrangement is that even if it is not used for contact oxidation, when the percolation structure is blocked, the back washing of the percolation structure can be realized by connecting tap water to the upper end of the aeration connecting pipe 18, so as to avoid the blockage of the percolation structure, and achieve the effect of killing two birds with one stone.
Preferably, the bottom of the water storage cavity 3 is provided with a sludge tank 19 for precipitating sludge, the front side wall of the sludge tank 19 is connected with the front cavity wall of the water storage cavity 3, the rear side wall of the sludge tank 19 is inclined backwards from bottom to top gradually, and the rear side wall of the sludge tank 19 is connected with the rear cavity wall of the water storage cavity 3. The rear side wall of the sludge groove 19 is inclined backwards from bottom to top gradually, so that more excrement and impurities in the domestic sewage are deposited on the rear side wall of the sludge groove 19 under the driving action of water flow, and the rear side wall of the sludge groove 19 forms a slope surface, so that the sludge moves downwards on the slope surface to be deposited on the bottom of the sludge groove 19.
Preferably, the water storage module 1 further includes a cleaning opening 20 communicating the inside and the outside of the water storage chamber 3, and a cleaning cover 21 for opening/closing the cleaning opening 20. If the sludge in the water storage cavity 3 is too much, the sewage can be cleaned in a manual sewage cleaning mode after the sewage cleaning cover 21 is opened.
Preferably, a serrated plate 22 is arranged in the water storage cavity 3 in front of the first water outlet 5 and perpendicular to the water flow direction, serrations of the serrated plate 22 are horizontally arranged, peaks of the serrations 22 are upwardly arranged, and valleys of the serrations 22 are higher than a lower edge of the first water outlet 5. Through the setting of serration plate 22, the impurities floating on the surface of the domestic sewage are blocked by the serration part of serration plate 22, preventing the subsequent parts from being blocked.
Preferably, the water storage module 1 further includes an air outlet 23 communicating the inside and the outside of the water storage chamber 3, and an air outlet cover 24 for opening/closing the air outlet 23. The vent hole 23 is provided to facilitate the discharge of gas formed after the anaerobic fermentation of the domestic sewage.
Preferably, the bottom of the sludge tank 19 is provided with a sludge discharge hole 25 communicating the inside and the outside of the water storage chamber 3, and the bottom of the sludge tank 19 is further provided with a sludge discharge hole cover for opening/closing the sludge discharge hole 25. The sludge can be discharged through the arrangement of the sludge discharge holes 25.
Preferably, according to the actual situation, the percolation module 2 can also set a corresponding sewage disposal opening, a sewage disposal cover, an exhaust hole, an exhaust cover, a sludge discharge hole and a sludge discharge hole cover with reference to the water storage module 1.
The embodiment of the embodiment is that the domestic sewage enters the water storage cavity 3 through the first water inlet 4, and after the first adjustment, precipitation and anaerobic fermentation, part of sludge containing feces, feces residues and feces peels is precipitated, the serration plate 22 blocks impurities floating on the surface of the domestic sewage, the treated domestic sewage enters the percolation cavity 6 through the first water outlet 5 and the second water inlet 7, and at this time, the domestic sewage is subjected to the second anaerobic fermentation, because the quartz sand gravel layer 11, the first limestone gravel layer 12 and the second limestone gravel layer 13 of the percolation structure are arranged into a structure with the diameters sequentially increasing from front to back, the impurities in the domestic sewage are not easy to pass through the percolation structure to generate the secondary precipitation, meanwhile, the multilevel percolation layer selects gravels containing limestone gravels, and experiments show that the removal rate of pollution indexes is higher by increasing the limestone gravels, although chemical precipitation generated by the reaction of the limestone and total phosphorus is attached inside pores can cause the reduction of the permeability of a substrate, however, the limestone gravel active material and sewage generate corrosion action, the surface of the gravel forms corrosion to generate a corrosion groove, the void space of the whole structure is enlarged to a certain extent, the system is favorable for achieving corrosion-blockage dynamic balance, and the negative influence caused by chemical precipitation is effectively reduced; the aeration system is arranged in the percolation structure, so that domestic sewage is subjected to contact oxidation, the multistage percolation layers with the grain sizes ranging from thin to thick along the water flow direction can generate a superposition effect, and the action strength on nitrogen and phosphorus is higher than that of a single graded substrate; experiments show that the removal rates of the contact oxidation multistage percolation layer structure with the reverse rhythm on COD, TN, NH3-N and TP are respectively 15.1-18.5%, 2.1-5.5%, 28.3-32.7% and 40.2-45.2%, and especially the removal effect on total phosphorus is better. The aeration pipe 16 can also be used for backwashing the multi-stage percolation layer, and the aeration and backwashing can achieve the effect of killing two birds with one stone. Domestic sewage through this rural domestic sewage treatment system processing is cleaner, and innoxious effect obtains the promotion of very big degree, and the treatment effeciency is higher, also cleaner health.
The water storage module 1 and the percolation module 2 of the rural domestic sewage treatment system can be independently designed according to actual conditions, the water storage module 1 and the percolation module 2 are both square, the length and the width of the water storage module 1 are both 1 meter and the depth of the water storage module 1 is 0.8-1 meter, the first water outlet 5 is 0.05-0.1 meter lower than the first water inlet 4, and the included angle between the rear side wall of the sludge groove 19 and the horizontal plane is 15-30 degrees; the distance between the serrated plate 22 and the first water outlet 5 is 0.1-0.2 m, a first top baffle is arranged at the upper part of the water storage module 1, the top baffle is arranged in a surrounding manner to form a space capable of filling soil, and farmers can plant crops such as flowers, plants and the like on the space; the length of the percolation module 2 is 1-1.1 meter, the width is 1 meter, the depth is 0.8-1 meter, the second water outlet 8 is 0-0.05 meter lower than the second water inlet 7, a percolation structure is arranged at a position 0.5 meter of the second water inlet 7, the total thickness of the percolation structure is 0.4-0.5 meter, and the aperture of the first perforated plate 9 and the aperture of the second perforated plate 10 are based on the condition that quartz gravel or limestone gravel is not easy to leak; in this example, the thickness of the quartz gravel is 0.1 to 0.15 m and the grain size ranges from 0.005 to 0.015 m, the thickness of the first gritty gravel layer 12 is 0.15 to 0.2 m and the grain size is 0.01 to 0.02 m, and the thickness of the second gritty gravel layer 13 is 0.15 to 0.2 m and the grain size is 0.015 to 0.03 m.
In this embodiment, the water storage module 1 and the percolation module 2 may be combined with the present embodiment differently to meet different requirements; according to different utilization modes of domestic sewage, the embodiment specifically provides two utilization modes.
One of the ways is a resource utilization way, as shown in fig. 4, a water storage module is separately arranged behind a water storage module 1 and a percolation module 2 which are interchanged in the embodiment, the domestic grey water can directly enter the water storage module without passing through the percolation module, and the domestic black water respectively enters the water storage module 1 and the percolation module 2 in the embodiment; the domestic black water and the grey water are respectively treated by the arrangement, so that the treatment effect of the domestic sewage is better, and the treatment efficiency is higher; the treated domestic sewage can reach the standard of farmland irrigation, and is pumped into a high-level water collecting tank through a submersible pump to irrigate farmlands, gardens, woodlands, lawns, vegetable gardens or orchards; the combination of the water storage modules 1, the percolation module 2 and the water storage modules may be arranged in a line or in an "L" shape according to different installation spaces.
The other mode is a direct discharge mode, as shown in fig. 5, in order to reach the standard of direct discharge, it is required that domestic sewage should be further processed, and then a percolation module and a water storage module are sequentially added after a water storage module 1 and a percolation module 2 in this embodiment, and similarly, domestic black water sequentially enters the water storage module 1 and the percolation module 2 in this embodiment, and then sequentially enters the newly added percolation module and the water storage module, so that the domestic black water is further processed, and the discharged water quality reaches the direct discharge standard; in addition, the grey water can directly enter the newly-added water storage module, or a percolation module can be additionally added to independently process the domestic grey water, and then the processed domestic grey water is discharged into the water storage module at the tail end; in a word, the rural domestic sewage treatment system can be independently implemented and can be split and combined according to actual needs.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. A rural domestic sewage treatment system is characterized by comprising a water storage module (1) and a percolation module (2) which are sequentially arranged from front to back; a water storage cavity (3) is arranged in the water storage module (1), a first water inlet (4) communicated with the water storage cavity (3) is formed in the front part of the water storage module (1), a first water outlet (5) communicated with the water storage cavity (3) is formed in the rear part of the water storage module (1), and the first water inlet (4) is higher than the first water outlet (5); a percolation chamber (6) is arranged in the percolation module (2), a second water inlet (7) communicated with the percolation chamber (6) is arranged at the front part of the percolation module (2), a second water outlet (8) communicated with the percolation chamber (6) is arranged at the rear part of the percolation module (2), the second water inlet (7) is higher than or equal to the second water outlet (8), and the second water inlet (7) is communicated with the first water outlet (5) and has the same height; be equipped with the filtration structure that supplies sewage to pass in infiltration chamber (6), the filtration structure includes first perforated plate (9), multistage infiltration layer and second perforated plate (10) that set gradually backward in the past, multistage infiltration layer includes quartzy gritty bed (11), first gritty gravel layer (12) and second gritty gravel layer (13) that set gradually backward in the past, the average particle size of second gritty gravel layer (13) is greater than the average particle size of first gritty gravel layer (12), the average particle size of first gritty gravel layer (12) is greater than the average particle size of quartzy gritty gravel layer (11).
2. The rural domestic sewage treatment system of claim 1 wherein the multistage percolation layer further comprises a third limestone gravel layer disposed behind the second limestone gravel layer (13), the third limestone gravel layer having an average particle size greater than the average particle size of the second limestone gravel layer (13).
3. The rural domestic sewage treatment system of claim 2 wherein the multistage percolation layer further comprises a fourth limestone gravel layer disposed behind the third limestone gravel layer, the fourth limestone gravel layer having an average particle size greater than the average particle size of the third limestone gravel layer.
4. The rural domestic sewage treatment system of any one of claims 1-3, wherein an aeration system is provided in the multistage percolation layer.
5. The rural domestic sewage treatment system of claim 4, wherein the aeration system comprises an aeration pipe (16) with a length extending along the front-back direction, a plurality of aeration holes (17) are formed in the aeration pipe (16) in the axial direction and the circumferential direction, the percolation module (2) further comprises a vertically arranged aeration connecting pipe (18), the rear end of the aeration pipe (16) is communicated with the aeration connecting pipe (18), and the upper end of the aeration connecting pipe (18) penetrates through the wall of the percolation chamber (6) and extends outwards.
6. The rural domestic sewage treatment system according to claim 1-3, wherein the bottom of the water storage chamber (3) is provided with a sludge tank (19) for settling sludge, the front side wall of the sludge tank (19) is connected with the front chamber wall of the water storage chamber (3), the rear side wall of the sludge tank (19) is gradually inclined backwards from bottom to top, and the rear side wall of the sludge tank (19) is connected with the rear chamber wall of the water storage chamber (3).
7. The rural domestic sewage treatment system according to claim 1, wherein the water storage module (1) further comprises a sewage cleaning port (20) communicating the inside and the outside of the water storage chamber (3) and a sewage cleaning cover (21) for opening/closing the sewage cleaning port (20).
8. The rural domestic sewage treatment system according to claim 1, wherein a serration plate (22) is arranged in the water storage cavity (3) in front of the first water outlet (5) and perpendicular to the water flow direction, the serrations of the serration plate (22) are horizontally arranged, the teeth peaks of the serration plate (22) are upwardly arranged, and the teeth valleys of the serration plate (22) are higher than the lower edge of the first water outlet (5).
9. The rural domestic sewage treatment system according to claim 1, wherein the water storage module (1) further comprises an exhaust hole (23) communicating the inside and outside of the water storage chamber (3) and an exhaust cover (24) for opening/closing the exhaust hole (23).
10. The rural domestic sewage treatment system according to claim 6, wherein the bottom of the sludge tank (19) is provided with a sludge discharge hole (25) communicating the inside and the outside of the water storage chamber (3), and the bottom of the sludge tank (19) is further provided with a sludge discharge hole cover for opening/closing the sludge discharge hole (25).
CN202111281444.3A 2021-11-01 2021-11-01 Rural domestic sewage treatment system Pending CN113860658A (en)

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Application Number Priority Date Filing Date Title
CN202111281444.3A CN113860658A (en) 2021-11-01 2021-11-01 Rural domestic sewage treatment system

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Application Number Priority Date Filing Date Title
CN202111281444.3A CN113860658A (en) 2021-11-01 2021-11-01 Rural domestic sewage treatment system

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CN113860658A true CN113860658A (en) 2021-12-31

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CN202111281444.3A Pending CN113860658A (en) 2021-11-01 2021-11-01 Rural domestic sewage treatment system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403171A (en) * 2022-08-30 2022-11-29 山东水利建设集团有限公司巨野分公司 Filter tank device with uniform particle filter material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403171A (en) * 2022-08-30 2022-11-29 山东水利建设集团有限公司巨野分公司 Filter tank device with uniform particle filter material

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