An integrated sewage treatment device suitable for rural sewage

Abstract

An integrated sewage treatment device suitable for rural sewage belongs to the technical field of sewage treatment. The specific scheme is as follows: An integrated sewage treatment device suitable for rural sewage includes an inlet pipe, an anaerobic biochemical unit, an aerobic tank, a mud-water separation tank, a mud storage tank, a coagulation tank, a reaction tank, a sedimentation tank, a disinfection tank and an outlet pipe. Along the flow direction of the sewage, the inlet pipe, the anaerobic biochemical unit, the aerobic tank and the mud-water separation tank are connected in series in sequence, the lower mud area of ​​the mud-water separation tank is connected to the mud storage tank, the upper water area of ​​the mud-water separation tank is connected to the coagulation tank, the coagulation tank, the reaction tank, the sedimentation tank and the disinfection tank are connected in series in sequence, and the disinfection tank is connected to the outlet pipe. The sewage treated by the device described in the present invention can ensure that the effluent water quality meets the discharge standard of Class A of the Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 18918-2002).

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an integrated sewage treatment device suitable for rural sewage. Background Art

[0002] Nowadays, my country's rural areas have undergone earth-shaking changes in economic and social development, and the material living standards of the people have been significantly improved. However, due to the relatively extensive rural development concept and weak environmental awareness in the past, rural sewage has not been properly treated, resulting in increasingly serious water pollution, which not only harms the ecological environment, but also threatens human health, and does not conform to the concept of sustainable development. Therefore, the problem of rural sewage treatment needs to be solved urgently.

[0003] At present, most rural sewage treatment facilities copy the urban sewage treatment model and blindly choose treatment facilities and supporting equipment with novel technology, long process flow, high installation cost and difficult maintenance. For rural areas with scattered layout, complex terrain and large fluctuations in water quality and quantity, most sewage treatment facilities are idle and cannot be put into production due to backward economic strength and management level. Therefore, it is of great significance to develop rural sewage centralized treatment devices and methods that are compatible with the current rural social and economic development situation, cost-saving, easy to manage, stable in operation and meet the effluent water quality standards, in order to improve the utilization rate of water resources and reduce environmental pollution.

[0004] When designing sewage treatment equipment and methods for centralized rural sewage treatment, in order to save costs, mechanical stirring and sludge sedimentation equipment should be reduced as much as possible; for ease of management, an integrated design approach should be adopted as much as possible; for stable operation, the characteristics of large fluctuations in rural sewage quality and quantity should be taken into consideration as much as possible; to ensure the effluent quality, the characteristics of low sludge activity in low temperature periods, low total bacterial count, and limited pollutant removal effects should be considered. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of high installation cost and difficult maintenance of rural sewage treatment equipment in the prior art, and to provide an integrated sewage treatment device suitable for rural sewage.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] An integrated sewage treatment device suitable for rural sewage comprises an inlet pipe, an anaerobic biochemical unit, an aerobic tank, a mud-water separation tank, a mud storage tank, a disinfection tank and an outlet pipe. Along the flow direction of the sewage, the inlet pipe, the anaerobic biochemical unit, the aerobic tank and the mud-water separation tank are sequentially connected in series, the lower mud area of ​​the mud-water separation tank is connected to the mud storage tank, the upper water area of ​​the mud-water separation tank is connected to the disinfection tank, and the disinfection tank is connected to the outlet pipe.

[0008] Furthermore, the device also includes a coagulation tank, a reaction tank and a sedimentation tank. Along the flow direction of the sewage, the coagulation tank, the reaction tank and the sedimentation tank are connected in series in sequence and are located between the mud-water separation tank and the disinfection tank. The inlet of the coagulation tank is connected to the upper water area of ​​the mud-water separation tank, and the outlet of the sedimentation tank is connected to the disinfection tank.

[0009] Preferably, the anaerobic biochemical unit comprises an anaerobic tank and an anoxic tank, the inlet of the anaerobic tank is connected to the water inlet pipe, the outlet is connected to the inlet of the anoxic tank, and the outlet of the anoxic tank is connected to the aerobic tank.

[0010] Furthermore, the anaerobic biochemical unit also includes an anaerobic hydrolysis tank, which is located between the water inlet pipe and the anaerobic tank. The inlet of the anaerobic hydrolysis tank is connected to the water inlet pipe, and the outlet is connected to the inlet of the anaerobic tank.

[0011] Preferably, the anaerobic biochemical unit comprises an anaerobic hydrolysis tank and an anoxic tank, the inlet of the anaerobic hydrolysis tank is connected to the water inlet pipe, the outlet is connected to the inlet of the anoxic tank, and the outlet of the anoxic tank is connected to the aerobic tank.

[0012] Furthermore, a plurality of folding plates are vertically arranged inside the anaerobic hydrolysis tank, the anaerobic tank and the anoxic tank, and the flow track of the sewage between the folding plates is in a 'snake' shape.

[0013] Furthermore, an overflow weir I is provided at the upper end of the aerobic tank, and the overflow weir I is connected to the bottom of the mud-water separation tank through an overflow pipe.

[0014] Furthermore, the upper water zone of the mud-water separation tank is connected with the upper end of the coagulation tank through an overflow weir II and an overflow hole II arranged at the upper end of the tank wall between the mud-water separation tank and the coagulation tank, the bottom of the coagulation tank is connected with the bottom of the reaction tank, the top of the reaction tank is connected with the bottom of the sedimentation tank, the top of the sedimentation tank is connected with the disinfection tank through an overflow weir III and an overflow hole III arranged at the upper end of the tank wall between the sedimentation tank and the disinfection tank, a plurality of perforated plates I are horizontally arranged inside the coagulation tank, a through hole I is arranged in the middle of the perforated plate I, a plurality of perforated plates II are horizontally arranged inside the reaction tank, a through hole II is arranged in the middle of the perforated plate II.

[0015] Furthermore, the aerobic tank is connected to the anoxic tank through a sewage return pump and a sewage return pipe, the sludge storage tank is connected to the anaerobic tank through a sludge return pump and a sludge return pipe, and the sludge storage tank is connected to the outside through a sludge discharge pipe.

[0016] Furthermore, the sedimentation tank is an inclined plate sedimentation tank, an inclined tube sedimentation tank, a perforated plate sedimentation tank or a folded plate sedimentation tank.

[0017] A method for treating sewage using the above-mentioned integrated sewage treatment device comprises the following steps:

[0018] Step 1: The sewage flows into the anaerobic biochemical unit and the aerobic tank in sequence through the water inlet pipe, and after biochemical reaction, a mixture I is obtained;

[0019] Step 2: The mixture I flows into the mud-water separation tank for solid-liquid separation, the precipitated sludge flows into the sludge storage tank, and the obtained supernatant flows into the disinfection tank, and is discharged through the outlet pipe after disinfection.

[0020] Furthermore, in step 2, before the supernatant flows into the disinfection tank, it is first mixed with a coagulant to undergo a flocculation reaction to obtain a mixture II. The mixture II is subjected to solid-liquid separation, and the obtained supernatant flows into the disinfection tank.

[0021] The beneficial effects of the present invention relative to the prior art are:

[0022] In the biochemical reaction stage, the present invention uses a biofilm anaerobic hydrolysis process in an anaerobic hydrolysis tank to improve the conversion of particulate organic matter into water-soluble organic matter, improve the biodegradability of sewage, alleviate the impact of water quality fluctuations, and provide more biologically available carbon sources for biological denitrification and biological phosphorus removal; in anaerobic tanks, anoxic tanks and aerobic tanks, a folded plate flow biofilm AAO process is used to increase the biomass of the reactor, strengthen the contact between sewage and sludge, and achieve efficient removal of organic matter and nitrogen and phosphorus through a biofilm-activated sludge composite flora, thereby improving the impact resistance and operation stability of the treatment process; in the sludge return stage In the first stage, the sludge self-circulation process is used to realize the automatic renewal of sludge activity, ensure that the microorganisms of the biochemical unit are in a highly active state, and the separation effect of sludge and water is improved through the mud-water separation tank, the concentration of suspended matter in the water is reduced, and it is beneficial to the subsequent coagulation and sedimentation efficiency; in the coagulation tank, the perforated plate is used to strengthen the cyclone hydraulic effect, ensure that the sewage and the coagulant are evenly mixed, and the mechanical stirring equipment is omitted; in the reaction tank, the deep removal of pollutants is realized; in the sedimentation tank, the shallow sedimentation idea is used to strengthen the precipitation of chemical sludge, and the floor space of the treatment facility is reduced; and the pathogenic microorganisms in the sewage are reduced through the disinfection tank. The sludge concentration in the device of the present invention is high, the activity is strong, the equipment structure is simple, the configuration is compact, the operation is stable, the impact resistance is strong, it is easy to maintain, and it can be modularized and mass-produced. The sewage treated by the device of the present invention can ensure that the effluent water quality meets the discharge standard of Class A of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB 18918-2002). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the plan view of the integrated sewage treatment plant;

[0024] Figure 2 for Figure 1 AA section view in;

[0025] Figure 3 for Figure 1 BB cross-section diagram in.

[0026] Figure 4 This is a schematic diagram of the structure of sewage treatment equipment;

[0027] In the figure: 1, water inlet pipe, 2, anaerobic biochemical unit, 3, aerobic tank, 4, mud-water separation tank, 5, sludge storage tank, 6, disinfection tank, 7, outlet pipe, 8, coagulation tank, 9, reaction tank, 10, sedimentation tank, 11, sludge return pump, 12, sludge return pipe, 13, sludge discharge pipe, 14, sludge hole, 15, guide plate, 21, anaerobic tank, 22, anoxic tank, 23, anaerobic hydrolysis tank, 24, folding plate, 31, overflow weir I, 32, overflow pipe, 33, aeration device, 34, biological fixed filler, 35, sewage return pump, 36, sewage return pipe, 41, overflow weir Ⅱ, 42, overflow hole Ⅱ, 81, perforated plate Ⅰ, 82, through hole Ⅰ, 91, perforated plate Ⅱ, 92, through hole Ⅱ, 101, overflow weir Ⅲ, 102, overflow hole Ⅲ, 103, inclined plate, 231, fixed filler, 331, air pipe, 332, aeration head, 01, integrated sewage treatment device, 02, blower, 03, sludge dewatering equipment, 04, dosing equipment, 05, disinfection equipment, 06, sewage treatment room, 07, screen well, 08, screen, 09, regulating tank, 010, sewage lifting pump, 011, lifting pump outlet pipe, 012, outlet ditch. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 The technical solution of the present invention is described in detail with embodiments. Specific implementation method 1

[0030] An integrated sewage treatment device suitable for rural sewage comprises an inlet pipe 1, an anaerobic biochemical unit 2, an aerobic tank 3, a mud-water separation tank 4, a mud storage tank 5, a disinfection tank 6, an outlet pipe 7, a coagulation tank 8, a reaction tank 9 and a sedimentation tank 10. Along the flow direction of the sewage, the inlet pipe 1, the anaerobic biochemical unit 2, the aerobic tank 3 and the mud-water separation tank 4 are sequentially connected in series, the lower mud area of ​​the mud-water separation tank 4 is connected to the mud storage tank 5 through a mud hole 14, the upper water area of ​​the mud-water separation tank 4 is connected to the coagulation tank 8, the coagulation tank 8, the reaction tank 9, the sedimentation tank 10 and the disinfection tank 6 are sequentially connected in series, and the disinfection tank 6 is connected to the outlet pipe 7.

[0031] Furthermore, the anaerobic biochemical unit 2 includes an anaerobic hydrolysis tank 23, an anaerobic tank 21 and an anoxic tank 22, which are connected in series in sequence. The inlet of the anaerobic hydrolysis tank 23 is connected to the water inlet pipe 1, and the outlet of the anoxic tank 22 is connected to the aerobic tank 3. Several folding plates 24 are vertically arranged inside the anaerobic hydrolysis tank 23, the anaerobic tank 21 and the anoxic tank 22, and the flow trajectory of the sewage between the folding plates 24 is in a "snake" shape.

[0032] Furthermore, an overflow weir Ⅰ31 is provided at the upper end of the aerobic pool 3, and the overflow weir Ⅰ31 is connected to the bottom of the mud-water separation pool 4 through an overflow pipe 32. An aeration device 33 is provided at the bottom of the aerobic pool 3, and the aeration device 33 includes an air pipe 331 and a plurality of aeration heads 332. The plurality of aeration heads 332 are all connected to the air pipe 331, and the air pipe 331 is connected to the external blower 02. A biological fixed filler 34 is added inside the aerobic pool 3.

[0033] Furthermore, the upper water area of ​​the mud-water separation tank 4 is connected to the upper end of the coagulation tank 8 through an overflow weir II 41 and an overflow hole II 42 arranged on the tank wall between the mud-water separation tank 4 and the coagulation tank 8, the bottom of the coagulation tank 8 is connected to the bottom of the reaction tank 9, the top of the reaction tank 9 is connected to the bottom chemical sludge precipitation area of ​​the sedimentation tank 10 through a guide plate 15 vertically fixed on the top of the device, and the top of the sedimentation tank 10 is connected to the chemical sludge precipitation area of ​​the sedimentation tank 10 through an overflow weir arranged on the tank wall between the sedimentation tank 10 and the disinfection tank 6. Ⅲ101 and the overflow hole Ⅲ102 are connected with the disinfection tank 6. A plurality of perforated plates Ⅰ81 are fixedly arranged horizontally inside the coagulation tank 8. A through hole Ⅰ82 is arranged in the middle of the perforated plate Ⅰ81. The apertures of the through holes Ⅰ82 on the plurality of perforated plates Ⅰ81 are equal. A plurality of perforated plates Ⅱ91 are fixedly arranged horizontally inside the reaction tank 9. A through hole Ⅱ92 is arranged in the middle of the perforated plate Ⅱ91. The apertures of the through holes Ⅱ92 on the plurality of perforated plates Ⅱ91 increase successively from bottom to top.

[0034] Furthermore, the aerobic tank 3 is connected to the anoxic tank 22 through a sewage return pump 35 and a sewage return pipe 36, the sewage return pipe 36 connects the aerobic tank 3 and the anoxic tank 22, and the sewage return pump 35 is arranged on the sewage return pipe 36; the sludge storage tank 5 is connected to the anaerobic tank 21 through a sludge return pump 11 and a sludge return pipe 12, the sludge return pipe 12 connects the sludge storage tank 5 and the anaerobic tank 21, and the sludge return pump 11 is arranged on the sludge return pipe; the sludge storage tank 5 is connected to the external sludge dewatering equipment 03 through a sludge discharge pipe 13.

[0035] Furthermore, the sedimentation tank 10 is an inclined plate sedimentation tank, in which a plurality of inclined plates 103 are fixedly arranged, and two adjacent inclined plates 103 are arranged parallel to each other. The plurality of inclined plates 103 are arranged below the overflow weir III 101 .

[0036] Furthermore, the integrated sewage treatment device can be made into a square, round or rectangular shape. The manufacturing material can be steel, fiberglass, organic glass, PP, concrete or a combination of the above materials.

[0037] Furthermore, the integrated sewage treatment device can be laid on the ground or buried underground, and can be set inside or outside a room.

[0038] Furthermore, a fixed filler 231 is provided in the anaerobic hydrolysis tank 23 to prevent the microorganisms from moving with the water flow.

[0039] The integrated sewage treatment device integrates an anaerobic hydrolysis tank 23, an anaerobic tank 21, an anoxic tank 22, an aerobic tank 3, a mud-water separation tank 4, a mud storage tank 5, a coagulation tank 8, a reaction tank 9, a sedimentation tank 10 and a disinfection tank 6. It has a simple structure, a compact configuration, stable operation, strong impact resistance, easy maintenance, and can be modularly mass-produced.

[0040] A method for treating sewage using the above integrated sewage treatment device comprises the following steps:

[0041] Step 1, sewage flows into the anaerobic hydrolysis tank 23, the anaerobic tank 21, the anoxic tank 22 and the aerobic tank 3 in sequence through the water inlet pipe 1, and obtains a mixture I after biochemical reaction;

[0042] Step 2: A portion of the mixture I is returned to the entrance of the anoxic tank 22 through the sewage return pump 35 and the sewage return pipe 36 to mix with the influent therein, and the rest flows into the overflow pipe 32 through the overflow weir I 31 above the aerobic tank 3, and then flows into the bottom mud area of ​​the mud-water separation tank 4 through the overflow pipe 32. Under the impetus of the influent water flow, the sewage flows upward into the upper water area of ​​the mud-water separation tank 4, and the sludge stays in the mud area. After the solid-liquid separation, the precipitated sludge flows into the sludge storage tank 5 through the mud hole 14, and the obtained supernatant flows into the coagulation tank through the overflow weir II 41 and the overflow hole II 42. Pool 8, mixed with the coagulant in the coagulation tank 8 and passed through the through hole Ⅰ82 in the middle of the perforated plate Ⅰ81 to make it mixed evenly, and then flowed into the reaction tank 9 and passed through the through hole Ⅱ92 in the middle of the perforated plate Ⅱ91 to undergo flocculation reaction to obtain a mixture Ⅱ. After the mixture Ⅱ is separated into solid and liquid in the sedimentation tank 10, the supernatant flows into the disinfection tank 6 through the overflow weir Ⅲ101 and the overflow hole Ⅲ102, and is disinfected by the disinfection equipment 05 or by adding a disinfectant and then discharged through the outlet pipe 7. Part of the sludge in the sludge storage tank 5 flows back to the entrance of the anaerobic tank 21 to mix with the influent, and the remaining part is discharged through the sludge discharge pipe 13.

[0043] Furthermore, the rising velocity of the lower mud area of ​​the mud-water separation tank 4 is 2-3 m / h, and the rising velocity of the upper water area is 0.5-1 m / h.

[0044] Furthermore, the flow rate of the fluid in the coagulation tank 8 passing through the middle hole Ⅰ82 of the perforated plate Ⅰ81 is 0.5 m / s, and the flow rate of the fluid in the reaction tank 9 passing through the middle hole Ⅱ92 of the perforated plate Ⅱ91 decreases from 0.5 m / s to 0.1 m / s from bottom to top; the sewage in the coagulation tank 8 is disturbed by the water flow rate through the middle hole Ⅰ82 of the perforated plate Ⅰ81 to complete the mixing and flocculation reaction of the sewage and the coagulant, and in the reaction tank 9, the flow rate is gradually reduced in the flocculation stage, the disturbance of the water flow on the flocs is reduced, and the formation of flocs is promoted.

[0045] Furthermore, the flow rate of the sludge in the mud-water separation tank 4 flowing through the mud holes 14 is 0.5 m / s.

[0046] Furthermore, the water discharge capacity of the overflow weir Ⅰ31 is less than 2L / ms.

[0047] When the integrated sewage treatment device is in operation, the anaerobic hydrolysis tank 23, the anaerobic tank 21, the anoxic tank 22, the aerobic tank 3, the mud-water separation tank 4 and the mud storage tank 5 are filled with a mud-water mixture. The sewage is transported to the water inlet pipe 1, and under the push of the inlet water flow, it flows in a "snake" shape along the direction of the folding plate 24 through the anaerobic hydrolysis tank 23, the anaerobic tank 21, and the anoxic tank 22, and mixes with the mud-water mixture therein. In the anaerobic hydrolysis tank 23, the conversion of particulate organic matter into water-soluble organic matter is achieved, the biodegradability of sewage is improved, and more biologically available carbon sources are provided for biological denitrification and biological phosphorus removal. The release of phosphorus and the reduction of some organic matter are completed in the anaerobic tank 21. In the anoxic tank 22, the sewage is mixed with the nitrification liquid returned from the aerobic tank 3 for denitrification, and the concentration of nitrate and total nitrogen is reduced. After being treated in the anoxic tank 22, the sewage flows into the aerobic tank 3 from the side of the tank wall between the anoxic tank 22 and the aerobic tank 3 to undergo aerobic biochemical reactions, thereby achieving the purpose of reducing organic matter, converting ammonia nitrogen, and absorbing phosphorus. The air required in the aerobic tank 3 is sent to the bottom of the aerobic tank 3 by the blower 02 through the air pipe 331 and the aeration head 332. In order to increase the concentration of microorganisms in the aerobic tank 3, biological fixed fillers 34 are added to the aerobic tank 3. The mud-water mixture in the aerobic tank 3 enters the bottom mud area of ​​the mud-water separation tank 4 through the overflow weir Ⅰ31 and the overflow pipe 32. Under the impetus of the influent water flow, the sewage flows upward into the upper water area of ​​the mud-water separation tank, and the sludge stays in the mud area, achieving the effect of mud-water separation. The separated sewage enters the coagulation tank 8 through the overflow weir Ⅱ41 and the overflow hole Ⅱ42, flows downward under the impetus of the influent water flow, and mixes with the coagulant added by the dosing device 04. In order to make the mixing more uniform, a perforated plate Ⅰ81 is set in the coagulation tank 8, and the mixed liquid flows downward through the through hole Ⅰ82 on the perforated plate Ⅰ81. The mixture of sewage and coagulant in the coagulation tank 8 enters the reaction tank 9 at the bottom of the pool wall between the coagulation tank 8 and the reaction tank 9, flows upward under the impetus of the influent water flow, and flocculation reaction occurs, realizing the deep removal of pollutants. In order to increase the reaction rate and control the flow rate, a perforated plate Ⅱ91 is set in the reaction tank 9, and the mixture flows upward through the through hole Ⅱ92 on the perforated plate Ⅱ91. The sewage mixture after the reaction in the reaction tank 9 enters the sedimentation tank 10 from the upper part of the tank wall between the reaction tank 9 and the sedimentation tank 10 under the impetus of the inlet water flow, and then flows downward along the guide plate 15, and enters the bottom chemical sludge sedimentation area of ​​the sedimentation tank 10 from the bottom of the guide plate 15. The mud-water mixture in the chemical sludge sedimentation area flows upward under the impetus of the inlet water flow to achieve the separation of sewage and chemical sludge. In order to improve the sedimentation efficiency, an inclined plate 103 can be set in the sedimentation tank 10. The sewage from which the chemical sludge is removed by sedimentation flows upward through the overflow weir III 101 and the overflow hole III 102 under the impetus of the inlet water flow, and enters the disinfection tank 6, where pathogenic microorganisms are killed under the action of the disinfection equipment 05. The disinfected sewage is transported to the outlet ditch through the outlet pipe 7. The sludge in the mud area of ​​the mud-water separation tank 4 enters the mud storage tank 5 through the mud hole 14.Part of the sludge in the sludge storage tank 5 flows back to the anaerobic tank 21 through the sludge return pipe 12 and the sludge return pump 11, and the other part of the sludge enters the sludge dewatering equipment 03 through the sludge discharge pipe 13. An air lift pipe is set in the sludge storage tank 5 to replace the sludge return pipe 12, the sludge return pump 11 and the sludge discharge pipe 13, and part of the sludge is lifted to the anaerobic tank 21, and part of the sludge is lifted to the sludge dewatering equipment 03. The sludge passing through the mud-water separation tank 4 and the sludge storage tank 5 can achieve self-renewal. The effluent water quality of the sewage treated by the integrated sewage treatment device and the sewage treatment method can meet the requirements of Class A of the Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 18918-2002).

[0048] The mud-water separation tank 4 can achieve efficient separation of sewage and sludge. After the pollutants in the sewage pass through the anaerobic hydrolysis tank 23, the anaerobic tank 21, the anoxic tank 22 and the aerobic tank 3, the organic matter and nitrogen and phosphorus are removed. It is necessary to separate the sludge from the sewage. The mud hole 14 is set on one side of the mud-water separation tank 4 to achieve the mud-water separation function. When the sludge return pipe 12 and the sludge return pump 11 are working, the sludge in the mud-water separation tank 4 continuously flows into the sludge storage tank 5, thereby forming a sludge separation layer at the bottom of the mud-water separation tank 4. After the mixed liquid enters the mud-water separation tank 4 from the aerobic tank 3 through the overflow weir Ⅰ31, the sludge is intercepted by the mud-water separation tank 4, and the clarified sewage enters the subsequent coagulation tank 8 through the water area at the top of the mud-water separation tank 4. The designed mud-water separation tank 4 has the characteristics of efficient separation of sludge and water, which can significantly reduce the subsequent dosage of coagulant. Specific implementation method 2

[0050] The present embodiment differs from the first embodiment in that the anaerobic hydrolysis tank 23 is not provided, the water inlet pipe 1 is directly connected to the entrance of the anaerobic tank 21, the folding plate 24 is not provided in the anaerobic tank 21 and the anoxic tank 22, a stirrer is provided in the anaerobic tank 21 and the anoxic tank 22, and the remaining structures are the same as those in the first embodiment.

[0051] The method for treating sewage using the above-mentioned integrated sewage treatment device is different from the specific implementation method one in that: the sewage is transported to the water inlet pipe 1, and under the impetus of the inlet water flow, it flows into the anaerobic tank 21, the anoxic tank 22 and the aerobic tank 3 in sequence. In the anaerobic tank 21 and the anoxic tank 22, the mixer stirs the sewage therein, and the rest of the explanations are the same as the specific implementation method one.

[0052] The effluent water quality of the sewage after being treated by the above-mentioned integrated sewage treatment device and sewage treatment method can meet the requirements of Class B standard of "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB 18918-2002). Specific implementation method three

[0054] The present embodiment differs from the first embodiment in that the anaerobic tank 21 is not provided, and along the flow direction of the sewage, the water inlet pipe 1, the anaerobic hydrolysis tank 23, the anoxic tank 22 and the aerobic tank 3 are connected in series in sequence, and the sludge storage tank 5 is connected to the anoxic tank 22 via a sludge return pump 11 and a sludge return pipe 12, and the remaining structures are the same as those of the first embodiment.

[0055] The method for treating sewage using the above-mentioned integrated sewage treatment device is different from the specific implementation method 1 in that: the sewage is transported to the water inlet pipe 1, and under the impetus of the inlet water flow, it flows into the anaerobic hydrolysis tank 23, the anoxic tank 22 and the aerobic tank 3 in sequence, a part of the sludge in the sludge storage tank 5 is returned to the anoxic tank 22 through the sludge return pipe 12 and the sludge return pump 11, and the other part of the sludge enters the sludge dewatering device 03 through the sludge discharge pipe 13. The rest of the explanations are the same as the specific implementation method 1.

[0056] The effluent water quality of the sewage after being treated by the above-mentioned integrated sewage treatment device and sewage treatment method can meet the requirements of Level A standard of "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB 18918-2002). Specific implementation method four

[0058] The present embodiment is different from the specific embodiment one in that the coagulation tank 8, the reaction tank 9 and the sedimentation tank 10 are not provided, the lower mud area of ​​the mud-water separation tank 4 is connected to the mud storage tank, the upper water area of ​​the mud-water separation tank 4 is connected to the disinfection tank 6, and the remaining structures are the same as the specific embodiment one.

[0059] The method for treating sewage using the above-mentioned integrated sewage treatment device is different from the specific implementation mode 1 in that: after the sewage is solid-liquid separated in the mud-water separation tank 4, the precipitated sludge flows into the sludge storage tank 5, and the obtained supernatant flows into the disinfection tank 6, and is discharged through the outlet pipe 7 after disinfection. The rest of the explanations are the same as the specific implementation mode 1.

[0060] The effluent water quality of the sewage after being treated by the above-mentioned integrated sewage treatment device and sewage treatment method can meet the requirements of Class B standard of "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB 18918-2002). Specific implementation method five

[0062] A set of sewage treatment equipment, including a blower 02, a sludge dewatering device 03, a dosing device 04, a disinfection device 05 and any one of the integrated sewage treatment devices 01 described in specific embodiments one to four, the blower 02 is connected to the air pipe 331, the sludge dewatering device 03 is connected to the sludge discharge pipe 13, the dosing device 04 is connected to the coagulation tank 8, and the disinfection equipment 05 is connected to the disinfection tank 6.

[0063] Furthermore, the equipment also includes a screen well 07, a screen 08 is arranged inside the screen well 07, the screen well 07 is connected to the regulating tank and is arranged inside the regulating tank 09, and the regulating tank 09 is connected to the water inlet pipe 1 of the integrated sewage treatment device 01 through the sewage lifting pump 010 and the lifting pump outlet pipe 011.

[0064] Furthermore, the equipment also includes an outlet ditch 012, and the outlet ditch 012 is connected to the outlet pipe 7 of the integrated sewage treatment device 01.

[0065] The integrated sewage treatment device is installed in the sewage treatment room 06 together with the blower 02, the sludge dewatering equipment 03, the dosing equipment 04, and the disinfection equipment 05. Before being treated by the integrated treatment device 01, the rural sewage first passes through the grille 09 in the grille well 08 to intercept large particles and floating objects, and then enters the regulating tank 09 for homogenization and uniformity, and is pumped to the integrated sewage treatment device 01 in the sewage treatment room 06 by the sewage lifting pump 010 and the lifting pump outlet pipe 011. After being treated by the integrated treatment device 01, it is transported to the outlet ditch 012 by the integrated device outlet pipe 7. The sludge dewatering equipment 03 collects the sludge discharged by the integrated equipment through the mud discharge pipe 13. The air required by the integrated sewage treatment device 01 is transported by the blower 02 and the air pipe 331.

[0066] The above embodiments are merely illustrative of the present invention and do not limit its protection scope. Persons skilled in the art may further make partial changes thereto. As long as they do not exceed the spirit of the present invention, they are regarded as equivalent replacements for the present invention and are within the protection scope of the present invention.

Claims

1. An integrated sewage treatment device suitable for rural sewage, characterized by: The device comprises an inlet pipe (1), an anaerobic biochemical unit (2), an aerobic tank (3), a mud-water separation tank (4), a mud storage tank (5), a disinfection tank (6) and an outlet pipe (7). Along the flow direction of the sewage, the inlet pipe (1), the anaerobic biochemical unit (2), the aerobic tank (3) and the mud-water separation tank (4) are sequentially connected in series, the lower mud area of ​​the mud-water separation tank (4) is connected to the mud storage tank (5), the upper water area of ​​the mud-water separation tank (4) is connected to the disinfection tank (6), and the disinfection tank (6) is connected to the outlet pipe (7); the device also comprises a coagulation tank (8), a reaction tank (9) and a sedimentation tank (10). Along the flow direction of the sewage, the coagulation tank (8), the reaction tank (9) and the sedimentation tank (10) are sequentially connected in series The reaction tank (9) is connected to and located between the mud-water separation tank (4) and the disinfection tank (6); the inlet of the coagulation tank (8) is connected to the upper water area of ​​the mud-water separation tank (4), and the outlet of the sedimentation tank (10) is connected to the disinfection tank (6); a plurality of perforated plates I (81) are horizontally arranged inside the coagulation tank (8), and a through hole I (82) is arranged in the middle of the perforated plate I (81); a plurality of perforated plates II (91) are horizontally arranged inside the reaction tank (9), and a through hole II (92) is arranged in the middle of the perforated plate II (91); the apertures of the through holes I (82) on the plurality of perforated plates I (81) are equal, and the apertures of the through holes II (92) on the plurality of perforated plates II (91) increase from bottom to top.

2. The integrated sewage treatment device according to claim 1, characterized in that: The anaerobic biochemical unit (2) comprises an anaerobic tank (21) and an anoxic tank (22); the inlet of the anaerobic tank (21) is connected to the water inlet pipe (1), the outlet is connected to the inlet of the anoxic tank (22), and the outlet of the anoxic tank (22) is connected to the aerobic tank (3).

3. The integrated sewage treatment device according to claim 2, characterized in that: The anaerobic biochemical unit (2) further comprises an anaerobic hydrolysis tank (23), wherein the anaerobic hydrolysis tank (23) is located between the water inlet pipe (1) and the anaerobic tank (21), wherein the inlet of the anaerobic hydrolysis tank (23) is connected to the water inlet pipe (1), and the outlet of the anaerobic hydrolysis tank (23) is connected to the inlet of the anaerobic tank (21).

4. The integrated sewage treatment device according to claim 1, characterized in that: The anaerobic biochemical unit (2) comprises an anaerobic hydrolysis tank (23) and an anoxic tank (22); the inlet of the anaerobic hydrolysis tank (23) is connected to the water inlet pipe (1), the outlet is connected to the inlet of the anoxic tank (22), and the outlet of the anoxic tank (22) is connected to the aerobic tank (3).

5. The integrated sewage treatment device according to claim 3, characterized in that: A plurality of folding plates (24) are vertically arranged inside the anaerobic hydrolysis tank (23), the anaerobic tank (21) and the anoxic tank (22), and the flow track of the sewage between the folding plates (24) is in a 'snake' shape.

6. The integrated sewage treatment device according to claim 1, characterized in that: An overflow weir I (31) is provided at the upper end of the aerobic tank (3), and the overflow weir I (31) is connected to the bottom of the mud-water separation tank (4) through an overflow pipe (32).

7. The integrated sewage treatment device according to claim 1, characterized in that: The upper water zone of the mud-water separation tank (4) is connected to the upper end of the coagulation tank (8) through an overflow weir II (41) and an overflow hole II (42) arranged at the upper end of the tank wall between the mud-water separation tank (4) and the coagulation tank (8), the bottom of the coagulation tank (8) is connected to the bottom of the reaction tank (9), the top of the reaction tank (9) is connected to the bottom of the sedimentation tank (10), and the top of the sedimentation tank (10) is connected to the disinfection tank (6) through an overflow weir III (101) and an overflow hole III (102) arranged at the upper end of the tank wall between the sedimentation tank (10) and the disinfection tank (6).

8. The integrated sewage treatment device according to claim 2, characterized in that: The aerobic tank (3) is connected to the anoxic tank (22) via a sewage return pump (35) and a sewage return pipe (36); the sludge storage tank (5) is connected to the anaerobic tank (21) via a sludge return pump (11) and a sludge return pipe (12); and the sludge storage tank (5) is connected to the outside world via a sludge discharge pipe (13).

9. The integrated sewage treatment device according to claim 1, characterized in that: The sedimentation tank (10) is an inclined plate sedimentation tank, an inclined tube sedimentation tank, a perforated plate sedimentation tank or a folded plate sedimentation tank.

Images