CN113526654A - Integrated form integration sewage treatment system - Google Patents
Integrated form integration sewage treatment system Download PDFInfo
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- CN113526654A CN113526654A CN202010296831.3A CN202010296831A CN113526654A CN 113526654 A CN113526654 A CN 113526654A CN 202010296831 A CN202010296831 A CN 202010296831A CN 113526654 A CN113526654 A CN 113526654A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
- C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention belongs to the technical field of environmental engineering sewage treatment, and particularly relates to an integrated sewage treatment system. The device integrates four functional units, namely an anoxic biological regulation tank, a suspended filler biological reaction tank, a secondary sedimentation tank, a sludge storage tank and the like. The circular vertical flow type secondary sedimentation tank is arranged in the middle of the reactor, other three functional units are distributed around the central secondary sedimentation tank in a radial mode, and the whole device is of a cylindrical structure. The rural dispersed domestic sewage is uniformly distributed into an anoxic biological regulation tank through a pipeline, is lifted into a suspended filler biological reaction tank by a sewage air lifter after hydrolysis and acidification, wherein spherical suspended filler with the filling ratio of 40-50% is thrown into the suspended filler biological reaction tank, enters a central secondary sedimentation tank through an interception net at an overflow hole, is precipitated, is separated from mud and water, and is collected by a triangular weir and flows out through a water collecting tank. Nitrifying liquid in the suspended filler biological reaction tank flows back to the anoxic biological regulation tank through a nitrifying liquid air lifter and is subjected to denitrification by utilizing an inlet water organic carbon source.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an integrated sewage treatment system.
Background
In China, 320.7 ten thousand natural villages and 63.4 ten thousand administrative villages are shared; 2.2 ten thousand town sets and nearly 2 thousand town founds. According to statistics, the drainage of counties, towns and villages in China currently accounts for about 50% of the total drainage of the country, however, 96% of the villages and towns do not have drainage channels and sewage treatment systems, the sewage treatment rate of the counties and towns is about 11%, the sewage treatment rate to the first level of the counties and towns does not exceed 1%, a large amount of production and domestic sewage is randomly discharged, so that the serious pollution to surface and underground water sources of small towns and villages is caused, the eutrophication process of water bodies such as rivers, lakes, reservoirs and the like is accelerated, and the safety of drinking water in the counties is seriously threatened. Therefore, the improvement of the sewage treatment rate of villages and towns becomes key basic work content for healthy and comprehensive construction of new villages. However, most of the previous researches on the sewage control technology in China are directed at urban sewage or industrial wastewater, the characteristics and the applicable technology of rural decentralized sewage discharge are lack of deep and systematic understanding and research, and compared with developed countries, the research work in the field of rural decentralized sewage treatment in China is relatively lagged. Developed countries have actively explored and developed in the aspect of treating rural life treatment technologies, and obvious effects are achieved, and the more famous treatment technologies are as follows: a soil capillary infiltration and purification system, an Australia 'FILTER' (Feilu de) sewage treatment system, a Japanese small-sized purification tank (mainly adopting a combined process of an anaerobic FILTER and a contact aeration tank, a biological FILTER or a moving bed contact FILTER), a French earthworm ecological FILTER, a 'LIVING MACHINE' ecological treatment system, a Norway biological treatment and chemical flocculation dephosphorization integrated small-sized sewage purification device and the like. Aiming at the dispersed sewage treatment in the beginning stage in China, such as the existing biogas domestic sewage purification device, the vertical subsurface flow ecological filter bed technology, the land infiltration system and the like, the technologies have lower construction cost and operation cost, but occupy more land and have larger area and have low operation stability. Therefore, China has certain gaps with developed countries in the world in the aspects of stability, integration degree, intelligent control systems and the like of the distributed sewage treatment technology. Therefore, it is necessary to research and develop a rural decentralized sewage treatment system which is suitable for the national conditions of China, has the advantages of low reduction and operation cost, simple and convenient management and stable effect, aiming at the characteristics of small water amount, large daily change, intermittent discharge, obvious regional difference and the like of our rural decentralized sewage.
The suspension packed bed is a process combining an activated sludge process of suspension growth and a fluidized bed process of attachment growth (biofilm process), and the principle is that a certain amount of suspension carriers are added into an aeration tank of the activated sludge process to strengthen microorganisms (such as nitrobacteria) with long fixed generation period, strengthen mass transfer effect and further improve treatment effect. However, for rural dispersed domestic sewage treatment, the related suspension packed bed patents have some disadvantages: the integration and intensification degree is not high, the occupied area is large, and the waste of processing or construction materials is large. Moreover, the pretreatment system and the sludge treatment system are dissociated from the main body treatment system, such as an integrated sewage suspension carrier treatment process with the publication number of CN 1843981A; secondly, a plurality of electrical equipment are involved, and a biochemical nitrogen and phosphorus removal method of the municipal sewage suspension packed bed with publication number of CN1673120A relates to a sewage lifting pump, a residual sludge pump, a reflux pump, an air blower, a stirrer, a mud scraping and sucking machine and a dosing system, so that the system investment is large, and the operation and process control is complex; and thirdly, the lifting is realized by using a pump, so that the blockage is easy, the liquid level control is needed, and the maintenance process is complex. Meanwhile, the type selection of a lift pump with small flow is difficult; and fourthly, the treatment of the sludge is not considered, and the sludge management is troublesome. The above problems limit the application of the suspended packed bed process in the treatment of rural dispersed sewage.
Disclosure of Invention
The invention aims to provide an integrated sewage treatment system suitable for rural decentralized sewage treatment.
The invention provides an integrated sewage treatment system, which is of a cylindrical structure and comprises an anoxic biological regulation tank 15, a suspended filler biological reaction tank 17, a secondary sedimentation tank 18 and a sludge storage tank 16, wherein the secondary sedimentation tank 18 is positioned in the middle of the integrated sewage treatment system, and the anoxic biological regulation tank 15, the suspended filler biological reaction tank 17 and the sludge storage tank 16 surround the secondary sedimentation tank 18 and are radially distributed;
the anoxic biological regulation tank 15 comprises a water inlet header pipe 2, a water collecting pipe 36, a first arc-shaped perforated water distribution pipe 7 and a sewage air lifter 3, wherein the water inlet header pipe 2 is positioned at the upper part of one side of the anoxic biological regulation tank 15, the first arc-shaped perforated water distribution pipe 7 is positioned at the bottom of the anoxic biological regulation tank 15, and the water inlet header pipe 2 is connected with the first arc-shaped perforated water distribution pipe 7 through the water collecting pipe 36; the sewage air lifter 3 is fixed on a partition wall between the anoxic biological regulation tank 15 and the suspended filler biological reaction tank 17, one end of the sewage air lifter 3 is connected with a water inlet pipe 21 positioned in the suspended filler biological reaction tank 17, and a sewage lifting pipe 25 positioned on the sewage air lifter 3 at the other end is inserted into the anoxic biological regulation tank 15;
the suspended filler biological reaction tank 17 comprises a water inlet pipe 21, a second arc-shaped perforated water distribution pipe 39, an arc-shaped guide plate 6, a tubular microporous aeration pipe 13, an overflow hole 11, a nitrified liquid air lifter 4 and suspended fillers, the second arc-shaped perforated water distribution pipe 39 is positioned at the bottom of the suspended filler biological reaction tank 17, and the water inlet pipe 21 is connected with the second arc-shaped perforated water distribution pipe 39; the arc-shaped guide plate 6 is positioned in the middle of the suspended filler biological reaction tank 17 and is divided into a liquid raising area 47 and a liquid lowering area 48; the tubular microporous aeration pipe 13 is positioned at the bottom of the liquid lifting area 47, the tubular microporous aeration pipe 13 is connected with an aeration air inlet pipe 37, sewage and spherical suspended filler (containing biological membrane) enter a liquid descending area 48 through lifting, and form a circular flow around the arc-shaped guide plate 6; the overflow hole 11 is positioned at the upper part of the down-flow area 48, and the mixed liquid in the down-flow area 48 enters the secondary sedimentation tank central cylinder 10 through the connecting pipe 38 by the interception net; the nitrifying liquid air lifter 4 is positioned at the upper part of the liquid descending area 48, and one end of the nitrifying liquid air lifter 4 is connected with the anoxic biological regulation tank 15 through a pipeline to perform denitrification and denitrification on the anoxic biological regulation tank;
the secondary sedimentation tank 18 is a circular vertical flow sedimentation tank and comprises a secondary sedimentation tank central cylinder 10, a reflecting plate 8, a triangular weir 20, a water collecting tank 19, a water outlet pipe 1 and a sludge air lifter 5, wherein the reflecting plate 8 is positioned at the bottom of the secondary sedimentation tank central cylinder 10, the triangular weir 20 is positioned at the top end of the wall of the secondary sedimentation tank central cylinder 10, and the water outlet pipe 1 is positioned at one side of the water collecting tank 19; the sludge air lifter 5 is fixed on the inner wall of the secondary sedimentation tank 18, one end of the sludge air lifter 5 is connected with the sludge guide cylinder 14 in the sludge storage tank 16, and the other end of the sludge air lifter 5 is connected with the sludge inlet 24 at the bottom of the secondary sedimentation tank 18;
the sludge storage tank 16 comprises a sludge guide cylinder 14, a supernatant overflow port 12 and a sludge inlet 24, the sludge guide cylinder 14 is positioned in the middle of the sludge storage tank 16, the supernatant overflow port 12 is positioned on the partition wall of the anoxic biological regulation tank 15 and the sludge storage tank 16, the height of the supernatant overflow port is slightly higher than that of the water inlet main pipe 2, and supernatant in the sludge storage tank 16 returns to the anoxic biological regulation tank 15 through the supernatant overflow port 12.
In the invention, the sewage air lifter 3 comprises a baffle pipe 28 for blocking floating oil, scum and other substances, a U-shaped sewage water inlet 22, a sewage lifting pipe 25, a sewage liquid outlet 31, a sewage air pipe 29 and a sewage nozzle 32, wherein the baffle pipe 28 is sleeved on the upper part of the U-shaped sewage water inlet 22, the U-shaped sewage water inlet 22 is connected with the sewage lifting pipe 25 through a bottom U-shaped pipe, the sewage liquid outlet 31 is arranged at the top of the sewage lifting pipe 25, and the sewage lifting pipe 25 is connected with the sewage air pipe 29 through the sewage nozzle 32 arranged at the bottom of the sewage lifting pipe 25.
In the invention, the nitrifying liquid air lifter 4 consists of a straight pipe nitrifying liquid water inlet 23, a nitrifying liquid lifting pipe 26, a nitrifying liquid outlet 40, a nitrifying liquid air pipe 44 and a nitrifying liquid nozzle 41, wherein the straight pipe nitrifying liquid water inlet 23 is connected with the nitrifying liquid lifting pipe 26 through a straight pipe, the nitrifying liquid outlet 40 is arranged at the top of the nitrifying liquid lifting pipe 26, the nitrifying liquid lifting pipe 26 is connected with the nitrifying liquid air pipe 44 through the nitrifying liquid nozzle 41 positioned at the bottom of the nitrifying liquid lifting pipe 26, and pressure air also comes from the air blower 35; the top of the nitrifying liquid riser 26 is provided with an exhaust vent 30 for releasing gas.
In the invention, the sludge air lifter 5 comprises a straight pipe sludge inlet 24, a sludge lifting pipe 27, a sludge liquid outlet 42, a sludge air pipe 45 and a sludge nozzle 43, wherein the straight pipe sludge inlet 24 is connected with the sludge lifting pipe 27 through a straight pipe, the sludge liquid outlet 42 is arranged at the top of the sludge lifting pipe 27, and the sludge lifting pipe 27 is connected with the sludge air pipe 45 through the sludge nozzle 43 positioned at the bottom of the sludge lifting pipe 27.
In the present invention, the sludge air pipe 45, the sewage air pipe 29 and the nitrified liquid air pipe 44 are connected to the blower 35, respectively. In the invention, the total overflow port 46 is arranged on the inner wall of the sludge storage tank 16 close to the water outlet pipe 1, so that the requirement that large-flow rainwater and sewage surpass the treatment system in rainy season is met, and the treatment effect and the normal operation of the system are prevented from being influenced by overlarge water inflow of the system in rainy season.
In the invention, the particle size of the filled suspended filler in the suspended filler biological reaction tank 17 is 10mm-100mm, the specific gravity is 0.9-1.0, the specific surface is 100-3000m2/m3, the spherical suspended filler is put in the suspended filler biological reaction tank 17 according to 40-50% of the filling ratio, and the suspended filler is in a fluidized state under the dual actions of aeration and water inlet during operation, and the gas-water ratio is about 11: 1; the arc perforation water distribution pipe 7 and the arc guide plate 6 are concentric with the secondary sedimentation tank 18.
In the invention, the material flow in the device is realized and controlled by the air lifter, namely, the three processes of sewage lifting of the anoxic biological regulation tank 15, the return of the nitrifying liquid and the sludge discharge of the secondary sedimentation tank 18 are realized by the air lifter which is independently designed. The air lifter utilizes the specific gravity difference between the gas-water mixed liquid and the mixed liquid in the treatment pool to generate lifting power, so that the mixed liquid is lifted through the lifting pipe.
Compared with the prior art, the invention has the beneficial effects that:
1, the integration degree is high. The invention integrates four functional units of an anoxic biological regulation tank, a gas-lift circulation suspended filler biological reaction tank, a secondary sedimentation tank and a sludge storage tank into a whole, and has the functions of removing organic matters, removing nitrogen, managing sludge and the like. The reactor is characterized in that the secondary sedimentation tank is arranged in the middle of the reactor, other three functional units are radial and surround the central secondary sedimentation tank, the main body of the whole device is a cylinder, the processing units are more compact, the occupied area is smaller, the construction materials can be greatly saved, and the reduction of capital construction and operation cost is facilitated.
The main body of the device 2 is a gas lift circulation suspended filler biological reaction tank, combines the technical characteristics of a gas lift circulation reactor, a biological fluidized bed and the like, and has the following characteristics: firstly, dual flow states of flow pushing and complete mixing are realized through air-lift circulation; the filler is a suspended filler with the specific gravity close to that of water, good fluidization of the filler can be realized without large aeration intensity and water inflow velocity, and the power consumption for lifting and fluidization is low; thirdly, the biomass is guaranteed, and microorganisms (such as nitrifying bacteria) with long generation period can also be fixed and trapped. Therefore, the method has the advantages of good mass transfer effect and high treatment effect.
3 the invention is not provided with a primary sedimentation tank and an anoxic tank, and the anoxic biological regulation tank simultaneously regulates water quantity and water quality and hydrolyzes acid
The functions of digestion and anoxic pond. The organic matter of intaking is hydrolyzed and is acidized through the bed mud, improves the biodegradability of sewage. The nitrifying liquid in the suspended filler biological reaction tank flows back to the anoxic biological regulation tank to carry out denitrification by using inlet water organic matters as carbon sources, and no additional carbon source is needed. The anoxic biological regulation tank is not additionally provided with a stirring device, but plays a role in hydraulic stirring through the bottom arc perforation water distribution pipe.
4 the air stripping device replaces a lift pump to realize the transfer and flow control of the material flow (sewage, mixed liquid and sludge), not only has low manufacturing cost, but also avoids the blockage of the pump, has no problem of pump burning, does not need liquid level control, thereby saving the equipment cost and simplifying the operation. Meanwhile, the gas stripping device can be flexibly designed according to the requirements of lifting flow and lifting height of different occasions, and has the functions of releasing gas, avoiding floating oil scum from being lifted and the like according to different lifting requirements.
5 the invention can be adjusted, designed and processed according to the scale and the characteristics of the object to be used, and can also form a set of shaped products, thereby being convenient for processing and field installation.
6 the integrated air-lift circulation suspended filler dispersed sewage biological reaction device has low capital investment, good treatment effect and simple operation and operation, and is suitable for rural dispersed sewage treatment.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a top view of an integrated wastewater treatment system.
FIG. 2 is a sectional view taken along line A-A of an integrated sewage treatment system.
FIG. 3 is a sectional view taken along line B-B of an integrated sewage treatment system.
Reference numbers in the figures: 1 is a water outlet pipe, 2 is a water inlet header pipe, 3 is a sewage air lifter, 4 is a nitrifying liquid air lifter, 5 is a sludge air lifter, 6 is an arc-shaped guide plate, 7 is a first arc-shaped perforated water distribution pipe, 8 is a reflecting plate, 9 is a bell mouth, 10 is a central cylinder of a secondary sedimentation tank, 11 is an overflow hole, 12 is a supernatant overflow port, 13 is a tubular microporous aeration pipe, 14 is a sludge guide cylinder, 15 is an anoxic biological regulation tank, 16 is a sludge storage tank, 17 is a suspended filler biological reaction tank, 18 is a secondary sedimentation tank, 19 is a water collecting tank, 20 is a triangular weir, 21 is a suspended filler biological reaction tank water inlet pipe, 22 is a sewage water inlet, 23 is a nitrifying liquid water inlet, 24 is a sludge inlet port, 25 is a sewage lifting pipe, 26 is a nitrifying liquid lifting pipe, 27 is a sludge lifting pipe and 28 is a baffle pipe, 29 is a sewage air pipe, 30 is a nitrifying liquid exhaust port, 31 is a sewage liquid outlet, 32 is a sewage nozzle, 33 is a ball valve, 34 is an electromagnetic valve, 35 is an air blower, 36 is a water collecting pipe, 37 is an aeration air inlet pipe, 38 is a connecting pipe, 39 is a second arc-shaped perforated water distribution pipe, 40 is a nitrifying liquid outlet, 41 is a nitrifying liquid nozzle, 42 is a sludge liquid outlet, 43 is a sludge nozzle, 44 is a nitrifying liquid air pipe, 45 is a sludge air pipe, 46 is a main overflow port, 47 is a liquid rising area, and 48 is a liquid falling area.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention is further described below with reference to the figures and examples.
Example 1:
the sewage flow is 1m3/d, BOD5 is 200mg/L, and the ammonia nitrogen concentration is 40 mg/L.
As shown in FIGS. 1-3, an integrated wastewater treatment system has an effective volume of 1.94m3, a circular area of 1.39m2 in the plane of the entire reactor, an effective height of 1.4m, and an aspect ratio of 1.1. The reactor integrates four functional units, namely an anoxic biological regulation tank 15, a suspended filler biological reaction tank 17, a secondary sedimentation tank 18, a sludge storage tank 16 and the like into a whole, and the volumes of the four functional units are respectively 0.83m3, 0.42m3, 0.10m3 and 0.59m 3. The secondary sedimentation tank 18 is arranged in the middle of the reactor, and the other three functional units radially surround the central secondary sedimentation tank 18.
The anoxic biological regulation tank 15 comprises a water inlet header pipe 2, a water collecting pipe 36, a first arc-shaped perforated water distribution pipe 7 and a sewage air lifter 3, wherein the water inlet header pipe 2 is positioned at the upper part of one side of the anoxic biological regulation tank 15, and the water inlet header pipe 2 is connected with the first arc-shaped perforated water distribution pipe 7 through the water collecting pipe 36; the sewage air lifter 3 is fixed on a partition wall between the anoxic biological regulation tank 15 and the suspended filler biological reaction tank 17, one end of the sewage air lifter 3 is connected with a sewage lifting pipe 25, the other end of the sewage air lifter is connected with a water inlet pipe 21 positioned in the suspended filler biological reaction tank 17, and the sewage lifting pipe 25 is inserted into the anoxic biological regulation tank 15; the sewage air lifter 3 is composed of a blocking pipe 28 for blocking substances such as floating oil, scum and the like, a U-shaped sewage water inlet 22, a sewage lifting pipe 25, a sewage liquid outlet 31, a sewage air pipe 29 and a sewage nozzle 32, wherein the blocking pipe 28 is sleeved on the upper portion of the U-shaped sewage water inlet 22, the U-shaped sewage water inlet 22 is connected with the sewage lifting pipe 25 through a bottom U-shaped pipe, the sewage liquid outlet 31 is arranged at the top of the sewage lifting pipe 25, the sewage lifting pipe 25 is connected with the sewage air pipe 29 through the sewage nozzle 32 arranged at the bottom of the sewage lifting pipe 25, and pressure air comes from an air blower 35.
The suspended filler biological reaction tank 17 comprises a water inlet pipe 21, a second arc-shaped perforated water distribution pipe 39, an arc-shaped guide plate 6, a tubular microporous aeration pipe 13, an overflow hole 11 and a nitrified liquid air lifter 4, wherein the water inlet pipe 21 is connected with the second arc-shaped perforated water distribution pipe 39, and the second arc-shaped perforated water distribution pipe 39 is positioned at the bottom of the suspended filler biological reaction tank 17; the arc-shaped guide plate 6 is positioned in the middle of the suspended filler biological reaction tank 17 and is divided into a liquid raising area 47 and a liquid lowering area 48; the tubular microporous aeration pipe 13 is positioned at the bottom of the liquid lifting area 47, the tubular microporous aeration pipe 13 is connected with an aeration air inlet pipe 37, and sewage and spherical suspended filler (containing biological membrane) enter a liquid descending area 48 through lifting and form a circular flow around the arc-shaped guide plate 6; the overflow hole 11 is positioned at the upper part of the down-flow area 48, and the mixed liquid in the down-flow area 48 enters the secondary sedimentation tank central cylinder 10 through the connecting pipe 38 by the interception net; the nitrifying liquid air lifter 4 is positioned at the upper part of the liquid descending area 48, one end of the nitrifying liquid air lifter 4 is connected with the nitrifying liquid lifting pipe 26, the other end of the nitrifying liquid air lifter is connected with the anoxic biological regulation tank 15 through a pipeline to carry out denitrification and denitrification on the anoxic biological regulation tank, the nitrifying liquid lifting pipe 26 is connected with the nitrifying liquid water inlet 23, and the nitrifying liquid water inlet 23 is positioned at the middle upper part of the suspended filler biological reaction tank 17; the nitrifying liquid air lifter 4 comprises a straight pipe nitrifying liquid water inlet 23, a nitrifying liquid lifting pipe 26, a nitrifying liquid outlet 40, a nitrifying liquid air pipe 44, a nitrifying liquid nozzle 41 and the like, wherein the straight pipe nitrifying liquid water inlet 23 is connected with the nitrifying liquid lifting pipe 26 through a straight pipe, the nitrifying liquid outlet 40 is arranged at the top of the nitrifying liquid lifting pipe 26, the nitrifying liquid lifting pipe 26 is connected with the nitrifying liquid air pipe 44 through the nitrifying liquid nozzle 41 positioned at the bottom of the nitrifying liquid lifting pipe 26, and pressure air also comes from the air blower 35. The top of the nitrification liquid airlift riser 26 is provided with an exhaust vent 30 for releasing gas.
The secondary sedimentation tank 18 is a circular vertical flow sedimentation tank and comprises a secondary sedimentation tank central cylinder 10, a reflecting plate 8, a triangular weir 20, a water collecting tank 19, a water outlet pipe 1 and a sludge air lifter 5, wherein the reflecting plate 8 is positioned at the bottom of the secondary sedimentation tank central cylinder 10, the triangular weir 20 is positioned at the top end of the wall of the secondary sedimentation tank central cylinder 10, and the water outlet pipe 1 is positioned at one side of the water collecting tank 19; the sludge air lifter 5 is fixed on the inner wall of the secondary sedimentation tank 18, one end of the sludge air lifter 5 is connected with the sludge lifting pipe 27, the other end of the sludge air lifter 5 is connected with the sludge guide cylinder 14 in the sludge storage tank 16, the sludge air lifter 5 is connected with the sludge inlet 24, and the sludge inlet 24 is positioned at the bottom of the secondary sedimentation tank 18. Sludge at the bottom of the secondary sedimentation tank 18 enters the sludge guide cylinder 14 of the sludge storage tank 16 through the sludge air lifter 5. The sludge air lifter 5 comprises a straight pipe sludge inlet 24, a sludge lifting pipe 27, a sludge liquid outlet 42, a sludge air pipe 45, a sludge nozzle 43 and the like, wherein the straight pipe sludge inlet 24 is connected with the sludge lifting pipe 27 through a straight pipe, the sludge liquid outlet 42 is arranged at the top of the sludge lifting pipe 27, the sludge lifting pipe 27 is connected with the sludge air pipe 45 through the sludge nozzle 43 positioned at the bottom of the sludge lifting pipe 27, and pressure air comes from the air blower 35.
The sludge storage tank 16 comprises a sludge guide cylinder 14, a supernatant overflow port 12 and the like. The sludge in the secondary sedimentation tank 18 enters the sludge storage tank 16 through the sludge guide cylinder 14 in the middle of the sludge storage tank 16 to be concentrated and stabilized. Supernatant in the sludge storage tank 16 returns to the anoxic biological regulation tank 15 through the supernatant overflow port 12, and the supernatant overflow port 12 is positioned on the partition wall of the anoxic biological regulation tank 15 and the sludge storage tank 16 and is slightly higher than the height of the water inlet header pipe 2. And discharging the sludge at the bottom once in half a year through a sludge air lifter. A main overflow port 46 is formed in the inner wall of the sludge storage tank 16, which is close to the water outlet pipe 1, so that the requirement that large-flow rainwater and sewage surpass the treatment system in rainy seasons is met, and the treatment effect and the normal operation of the system are prevented from being influenced by overlarge water inflow of the system in rainy seasons.
The sewage enters an anoxic biological regulation tank 15, and the hydraulic retention time HRT is 20 h. The water inlet header pipe 2 is DN40, the bottom adopts two DN20 first arc perforation water distribution pipes 7 for water distribution, the two DN 3 first arc perforation water distribution pipes are respectively positioned at the positions with the radius of 300mm and 550mm, the first arc perforation water distribution pipe 7 at the inner ring is symmetrically provided with four water distribution holes, and the first arc perforation water distribution pipe 7 at the outer ring is provided with eight water distribution holes. Wherein, the bottom sludge plays a role in anaerobic hydrolysis acidification, and the sewage enters the suspended filler biological reaction tank 17 from the sewage air lifter 3. The hydraulic retention time HRT of the suspended filler biological reaction tank 17 is 10h, wherein spherical suspended filler with the filling ratio of 40-50% is put in the suspended filler biological reaction tank, the gas-water ratio is about 11: 1, eight water distribution holes are formed in a second arc perforation water distribution pipe 39 at the bottom of the liquid raising area 47, and the hole diameter is 8 mm. The tubular microporous aeration pipe 13 is adopted for aeration, the oxygen utilization efficiency is about 18 percent, the diameter is DN20, and the distance from the bottom of the tank is 200 mm. The treated effluent enters the DN44 secondary sedimentation tank central cylinder 10 through a connecting pipe 38 after being intercepted by the interception net of the DN75 overflow hole 11. 0.19m3 nitrifying liquid in the suspended filler biological reaction tank 17 flows back to the anoxic biological regulation tank 15 through the nitrifying liquid air lifter 4 to be subjected to denitrification. The secondary sedimentation tank 18 has HRT of 2h, surface hydraulic load of 0.6m3/(m2.h), effective water depth of 1.1m, water outlet from the triangular weir 20, and water outlet pipe 1 of DN 40. The BOD5 of the effluent is 30mg/L, and the ammonia nitrogen concentration is 15 mg/L. The sludge in the secondary sedimentation tank 18 is lifted into the sludge storage tank 16 through the sludge air lifter 5, and is discharged once in half a year by the sludge air lifter 5, and the sludge yield in half a year is 0.297m 3. Supernatant in the sludge storage tank 16 flows from the supernatant overflow port 12 to the anoxic biological regulation tank 15. A main overflow port 46 is arranged on the inner wall of the sludge storage tank 16 and close to the water outlet pipe 1, and large-flow rainwater in rainy seasons flows into the sludge storage tank 16 through the supernatant overflow port 12 and then flows out of the system through the main overflow port 46, so that the hydraulic impact of the large flow on the system is avoided.
The sewage water inlet 22 of the sewage air lifter 3 is DN40, the baffle pipe 28 is DN80 pipe, the sewage lifting pipe 25 is DN40 pipe, and the sewage air pipe 29 is DN 15; the nitrifying liquid water inlet 23 of the nitrifying liquid air lifter 4 is DN50, the nitrifying liquid lifting pipe 26 is DN50, and the nitrifying liquid air pipe 44 is DN 15; the sludge inlet 24 of the sludge airlift 5 is DN50, the sludge lifting pipe 27 is DN50, and the sludge air pipe 45 is DN 15.
The working process of the invention is as follows:
the mixed liquid of the dispersed domestic sewage inflow from the water inlet header pipe 2 and the backflow of the suspended filler biological reaction tank 17 enters the arc-shaped perforated water distribution pipe 7 through the water collection pipe 36 to achieve the effect of uniform water distribution and hydraulic mixing, thereby achieving the effects of adjusting the inflow water quantity and the water quality, and performing denitrification (by using inflow organic pollutants as carbon sources) and hydrolysis and acidification (by improving the biodegradability of sewage) by using bottom sludge; the sewage air lifter 3 is fixed on a partition wall between the anoxic biological regulation tank 15 and the suspended filler biological reaction tank 17, and sewage is lifted into the water inlet pipe 21 of the suspended filler biological reaction tank 17 through the sewage air lifter 3.
The sewage lifted by the anoxic biological regulation tank 15 is uniformly distributed into the suspended filler biological reaction tank 17 through the water inlet pipe 21 and the second arc-shaped perforated water distribution pipe 39 at the bottom; the arc guide plate 6 is positioned in the middle of the suspended filler biological reaction tank 17 and is divided into two areas: a liquid rising zone 47 and a liquid falling zone 48; the tubular microporous aeration pipe 13 is positioned at the bottom of the liquid lifting area 47 and plays roles in aeration, oxygen supply, stirring, mixed liquid (containing filler) lifting circulation and the like. The sewage and the spherical suspended filler (containing the biological membrane) enter the liquid descending area 48 through lifting and form a circular flow around the arc-shaped guide plate 6, wherein the sewage and the air are fully contacted with the biological membrane on the spherical suspended filler, so that organic matters in the sewage are degraded, and ammonia nitrogen is converted into nitrate through nitrification. The mixed liquid in the down-flow area 48 enters the central cylinder 10 of the secondary sedimentation tank through the connecting pipe 38 after the filler is intercepted by the intercepting net of the overflow hole 11; the nitrifying liquid air lifter 4 is also positioned at the upper part of the liquid descending area 48, and the mixed liquid is lifted into the anoxic biological regulation tank 15 through the nitrifying liquid air lifter to perform denitrification and denitrification by taking organic matters in the inlet water as a carbon source.
After entering a central cylinder 10 of a central secondary sedimentation tank, the mixed liquid is uniformly distributed into a sedimentation area for mud-water separation under the action of a reflecting plate 8, and clarified supernatant overflows from a triangular weir 20 at the top end of the tank wall, is collected by a water collecting tank 19 and is discharged out of the device through a water outlet pipe 1. The bottom settled sludge is lifted into a sludge guide cylinder 14 of a sludge storage tank 16 through a sludge air lifter 5, and then enters the sludge storage tank 16 for sludge concentration and stabilization, and once sludge discharge in half a year is carried out. The supernatant in the sludge storage tank 16 returns to the anoxic biological regulation tank 15 through the supernatant overflow port 12. A main overflow port 46 is arranged on the inner wall of the sludge storage tank 16 and close to the water outlet pipe 1, and large-flow rainwater in rainy seasons flows into the sludge storage tank 16 through the supernatant overflow port 12 and then flows out of the system through the main overflow port 46, so that the hydraulic impact of the large flow on the system is avoided.
During operation, air for the airlift is provided by blower 35.
Claims (7)
1. An integrated sewage treatment system is characterized in that the device is of a cylindrical structure and comprises an anoxic biological regulation tank (15), a suspended filler biological reaction tank (17), a secondary sedimentation tank (18) and a sludge storage tank (16), wherein the secondary sedimentation tank (18) is positioned in the middle of the device, and the anoxic biological regulation tank (15), the suspended filler biological reaction tank (17) and the sludge storage tank (16) surround the secondary sedimentation tank (18) and are radially distributed; the anoxic biological regulation tank (15) comprises a water inlet main pipe (2), a water collecting pipe (36), a first arc-shaped perforated water distribution pipe (7) and a sewage air lifter (3), wherein the water inlet main pipe (2) is positioned at the upper part of one side of the anoxic biological regulation tank (15), the first arc-shaped perforated water distribution pipe (7) is positioned at the bottom of the anoxic biological regulation tank (15), and the water inlet main pipe (2) is connected with the first arc-shaped perforated water distribution pipe (7) through the water collecting pipe (36); the sewage air lifter (3) is fixed on a partition wall between the anoxic biological regulation tank (15) and the suspended filler biological reaction tank (17), one end of the sewage air lifter (3) is connected with a water inlet pipe (21) positioned in the suspended filler biological reaction tank (17), and a sewage lifting pipe (25) positioned on the sewage air lifter (3) at the other end is inserted into the anoxic biological regulation tank (15); the suspended filler biological reaction tank (17) comprises a water inlet pipe (21), a second arc-shaped perforated water distribution pipe (39), an arc-shaped guide plate (6), a tubular microporous aeration pipe (13), overflow holes (11), a nitrified liquid air lifter (4) and suspended fillers, the second arc-shaped perforated water distribution pipe (39) is positioned at the bottom of the suspended filler biological reaction tank (17), and the water inlet pipe (21) is connected with the second arc-shaped perforated water distribution pipe (39); the arc-shaped guide plate (6) is positioned in the middle of the suspended filler biological reaction tank (17) and is divided into a liquid raising area (47) and a liquid lowering area (48); the tubular microporous aeration pipe (13) is positioned at the bottom of the liquid raising area (47), the tubular microporous aeration pipe (13) is connected with an aeration air inlet pipe (37), sewage and suspended filler enter the liquid lowering area (48) through lifting, and form circulation around the arc-shaped guide plate (6); the overflow hole (11) is positioned at the upper part of the down-flow area (48), and the mixed liquid in the down-flow area (48) enters the central cylinder (10) of the secondary sedimentation tank through the interception net and the connecting pipe (38); the nitrifying liquid air lifter (4) is positioned at the upper part of the liquid descending area (48), and one end of the nitrifying liquid air lifter (4) is connected with the anoxic biological regulation tank (15) through a pipeline to perform denitrification and denitrification on the anoxic biological regulation tank; the secondary sedimentation tank (18) is a circular vertical flow sedimentation tank and comprises a secondary sedimentation tank central cylinder (10), a reflecting plate (8), a triangular weir (20), a water collecting tank (19), a water outlet pipe (1) and a sludge air lifter (5), wherein the reflecting plate (8) is positioned at the bottom of the secondary sedimentation tank central cylinder (10), the triangular weir (20) is positioned at the top end of the tank wall of the secondary sedimentation tank central cylinder (10), and the water outlet pipe (1) is positioned on one side of the water collecting tank (19); the sludge air lifter (5) is fixed on the inner wall of the secondary sedimentation tank (18), one end of the sludge air lifter (5) is connected with a sludge guide cylinder (14) positioned in the sludge storage tank (16), and the sludge air lifter (5) is connected with a sludge inlet (24) positioned at the bottom of the secondary sedimentation tank (18); the sludge storage tank (16) comprises a sludge guide cylinder (14), a supernatant overflow port (12) and a sludge inlet (24), the sludge guide cylinder (14) is positioned in the middle of the sludge storage tank (16), the supernatant overflow port (12) is positioned on the anoxic biological regulation tank (15) and a partition wall of the sludge storage tank (16), the height of the supernatant overflow port is slightly higher than the height of the water inlet main pipe (2), and supernatant in the sludge storage tank (16) returns to the anoxic biological regulation tank (15) through the supernatant overflow port (12).
2. The integrated sewage treatment system according to claim 1, wherein the sewage air lifter (3) comprises a baffle pipe (28) for blocking floating oil and scum, a U-shaped sewage inlet (22), a sewage lifting pipe (25), a sewage outlet (31), a sewage air pipe (29) and a sewage nozzle (32), the baffle pipe (28) is sleeved on the upper part of the U-shaped sewage inlet (22), the U-shaped sewage inlet (22) and the sewage lifting pipe (25) are connected through a U-shaped pipe at the bottom, the sewage outlet (31) is arranged at the top of the sewage lifting pipe (25), the sewage lifting pipe (25) is connected with the sewage air pipe (29) through a sewage nozzle (32) positioned at the bottom of the sewage lifting pipe (25).
3. The integrated sewage treatment system according to claim 1, wherein the nitrifying liquid air lifter (4) is composed of a straight pipe nitrifying liquid water inlet (23), a nitrifying liquid lifting pipe (26), a nitrifying liquid outlet (40), a nitrifying liquid air pipe (44) and a nitrifying liquid nozzle (41), the straight pipe nitrifying liquid water inlet (23) and the nitrifying liquid lifting pipe (26) are connected through a straight pipe, the nitrifying liquid outlet (40) is arranged at the top of the nitrifying liquid lifting pipe (26), and the nitrifying liquid lifting pipe (26) and the nitrifying liquid air pipe (44) are connected through the nitrifying liquid nozzle (41) positioned at the bottom of the nitrifying liquid lifting pipe (26); the top of the nitrifying liquid lifting pipe (26) is provided with an exhaust hole (30).
4. The integrated sewage treatment system according to claim 1, wherein the sludge air lifter (5) comprises a straight pipe sludge inlet (24), a sludge lifting pipe (27), a sludge outlet (42), a sludge air pipe (45) and a sludge nozzle (43), the straight pipe sludge inlet (24) is connected with the sludge lifting pipe (27) through a straight pipe, the sludge outlet (42) is arranged at the top of the sludge lifting pipe (27), and the sludge lifting pipe (27) is connected with the sludge air pipe (45) through the sludge nozzle (43) arranged at the bottom of the sludge lifting pipe (27).
5. The integrated sewage treatment system according to claim 1, wherein the sludge air pipe (45), the sewage air pipe (29) and the nitrified liquid air pipe (44) are respectively connected with a blower (35).
6. An integrated sewage treatment system according to claim 1 wherein the inner wall of the sludge storage tank (16) is provided with a main overflow outlet (46) adjacent to the outlet pipe (1).
7. The integrated sewage treatment system according to claim 1, wherein the suspended filler filled in the suspended filler biological reaction tank (17) has a particle size of 10mm-100mm, a specific gravity of 0.9-1.0, a specific surface of 100-3000m2/m3, and the spherical suspended filler is disposed in the suspended filler biological reaction tank (17) at a filling ratio of 40-50%.
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|---|---|---|---|
| CN202010296831.3A CN113526654A (en) | 2020-04-15 | 2020-04-15 | Integrated form integration sewage treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162964A (en) * | 2022-02-11 | 2022-03-11 | 迈邦（北京）环保工程有限公司 | Air plug flow device and sewage treatment system |
| CN114988566A (en) * | 2022-07-01 | 2022-09-02 | 尚川(北京)环境工程有限公司 | Buried SBR sewage treatment device |
-
2020
- 2020-04-15 CN CN202010296831.3A patent/CN113526654A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162964A (en) * | 2022-02-11 | 2022-03-11 | 迈邦（北京）环保工程有限公司 | Air plug flow device and sewage treatment system |
| CN114988566A (en) * | 2022-07-01 | 2022-09-02 | 尚川(北京)环境工程有限公司 | Buried SBR sewage treatment device |
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