CN115557643A - Urban domestic sewage treatment system and resource utilization method - Google Patents
Urban domestic sewage treatment system and resource utilization method Download PDFInfo
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- CN115557643A CN115557643A CN202211274010.5A CN202211274010A CN115557643A CN 115557643 A CN115557643 A CN 115557643A CN 202211274010 A CN202211274010 A CN 202211274010A CN 115557643 A CN115557643 A CN 115557643A
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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
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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
- C02F3/1268—Membrane bioreactor systems
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/122—Pipe-line systems for waste water in building
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/122—Pipe-line systems for waste water in building
- E03C1/1222—Arrangements of devices in domestic waste water pipe-line systems
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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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 discloses a town domestic sewage treatment system and a resource utilization method, and aims to solve the problems of poor ammonia nitrogen removal effect and low resource utilization rate of low-carbon-nitrogen-ratio domestic sewage. The water outlet of a closestool in the urban domestic sewage treatment system is connected with the water inlet of a sewage storage tank through a first pipeline, a solid-liquid separator is arranged in the sewage storage tank, the water outlet of the sewage storage tank is connected with the feed inlet of a rotting fertilizer device through a second pipeline, one end of a third pipeline extends into a liquid phase region of the solid-liquid separator, the other end of the third pipeline is communicated with a first water inlet of a water storage tank, the water outlets of a bathing device and a vegetable washing tank are communicated with the water storage tank, and the water outlet of the water storage tank sequentially flows into an MBBR reaction tank, a reinforced denitrification tank and an UASB reactor through water pipes to control the hydraulic retention time. The town domestic sewage treatment system can save water and prepare agricultural fertilizer, and the removal rate of COD and TN of the treated sewage in the water storage tank reaches more than 95 percent.
Description
Technical Field
The invention relates to a domestic sewage treatment system and a resource utilization method.
Background
China advocates ecological civilized construction, so the problem of water pollution needs to be solved urgently. With the acceleration of social pace, the discharge amount of domestic sewage in villages and towns in China is continuously increased and gradually shows the trend of low carbon-nitrogen ratio (the low carbon-nitrogen ratio is COD/TN is less than 3-5), the urban sewage is sewage with low carbon-nitrogen ratio, and the premise of biological denitrification is that an adequate organic carbon source exists. The low-carbon-nitrogen domestic sewage has low organic carbon content, denitrification cannot be smoothly carried out, the shortage of a carbon source is a technical difficulty of denitrification, and an ammonia nitrogen removal process needs to be considered in the wastewater treatment process, so that the cost is increased.
Ammonia nitrogen accumulation can cause water eutrophication and threaten the survival of aquatic organisms, the quality of underground water gradually becomes poor, and excessive dissolved oxygen in water is consumed while algae are bred in a large scale, so that the normal growth of aquatic animals and plants can be damaged, the water quality of the water can be deteriorated, and the ecological balance of natural water can be seriously influenced; excessive ammonia nitrogen discharged into drinking water source may even harm human health. Eutrophication has another problem that it easily causes the generation of black and odorous water.
The important reason for the low carbon-nitrogen ratio of the municipal domestic sewage is that after the sewage is treated by a septic tank, the carbon source in the water body is lost, the denitrification is not facilitated, and the resource utilization rate is low.
Disclosure of Invention
The invention aims to solve the problems of poor ammonia nitrogen removal effect and low resource utilization rate of low-carbon-nitrogen-ratio domestic sewage, and provides a municipal domestic sewage treatment system and a resource utilization method.
The town domestic sewage treatment system comprises a closestool, a sewage storage tank, a rotting fertilizer device, a water storage tank, a bathing device, a vegetable washing tank, an MBBR reaction tank, a reinforced denitrification tank and a UASB reactor, wherein a water outlet of the closestool is connected with a water inlet of the sewage storage tank through a first pipeline, a solid-liquid separator is arranged in the sewage storage tank, a discharge outlet of the sewage storage tank is connected with a feed inlet of the rotting fertilizer device through a second pipeline, one end of a third pipeline extends into a liquid phase region of the solid-liquid separator, the other end of the third pipeline is communicated with the first water inlet of the water storage tank, and a suction device is arranged on the third pipeline;
the water outlet of the bathing device is communicated with the second water inlet of the water storage tank through a fourth pipeline, and the water outlet of the vegetable washing tank is communicated with the third water inlet of the water storage tank through a fifth pipeline;
the effluent of the water storage tank sequentially flows into an MBBR reaction tank, a reinforced denitrification tank and a UASB reactor through water pipes, wherein an aeration device is arranged at the bottom of the MBBR reaction tank, and suspended fillers are filled in the MBBR reaction tank; the reinforced denitrification tank is internally provided with shell powder filler and a fly ash ceramsite filter material, and the fly ash ceramsite filter material is loaded with nitrobacteria; the bottom of the UASB reactor is provided with a water distributor, the top of the UASB reactor is provided with a three-phase separator, and the inside of the UASB reactor is filled with granular sludge.
The town domestic sewage treatment and resource utilization method is realized according to the following steps:
1. flushing water of the closestool generated by the closestool flows into a sewage storage tank through a first pipeline for excrement-water separation, solid-phase excrement enters a manure decomposing device through a second pipeline for decomposition treatment, and the excrement water flows into a water storage tank through a third pipeline;
2. the bath water generated by the bath device flows into the water storage tank, and the temperature of the polluted water in the water storage tank is raised by the bath water;
3. vegetable washing water generated by the vegetable washing pool flows into the water storage pool through a fifth pipeline;
4. the polluted water in the water storage tank flows into the MBBR reaction tank through a pipeline, an aeration device carries out aeration treatment, and the hydraulic retention time in the MBBR reaction tank is controlled to be 6-10 h, so that nitrified sewage is obtained;
5. the nitrified sewage flows into an enhanced denitrification tank for enhanced denitrification to obtain enhanced sewage;
6. the sewage after the strengthening treatment flows into a UASB reactor, the hydraulic retention time in the UASB reactor is controlled to be 8-12 h under the anaerobic condition, and the purified water is discharged from a water outlet of a three-phase separator, so that the treatment and resource utilization of the urban domestic sewage are completed.
The invention relates to a town domestic sewage treatment system and a resource utilization method. In the domestic sewage treatment method, the solid-liquid separator is adopted to flush the closestool to separate solid excrement and liquid dung, excrement dissolved matters remained in the liquid dung are used as carbon sources and are supplemented to a sewage treatment system, and aeration and oxygenation are carried out through a pipeline in the sewage conveying process to increase the biochemical treatment efficiency; the bath water is discharged to a sewage storage pool after heat recovery; the vegetable washing water is directly aerated through a pipeline and conveyed to the water storage tank, and after biochemical reaction is carried out in the water storage tank, the water treated in the water storage tank can also be directly used as fermentation water. The manure is directly prepared into agricultural organic fertilizer after being decomposed and ripened, and the agricultural organic fertilizer is returned to the field for planting and utilization. The water pipe is additionally provided with the air inlet to realize automatic aeration and oxygenation, accelerate the biochemical degradation process, fully utilize residual carbon source and nitrogen source in water and save water.
According to the town domestic sewage treatment system, the MBBR reaction tank, the enhanced denitrification tank and the UASB reactor are sequentially arranged at the rear end of the water storage tank, the water inlet temperatures of the MBBR reaction tank and the UASB reactor are guaranteed to be 25-35 ℃ by utilizing the heat of bath water, wherein the MBBR reaction tank mainly performs nitration reaction by utilizing a biological film on a suspended filler, a shell powder filler and a fly ash ceramsite filter material are filled in the enhanced denitrification tank, the alkalinity of inlet water can be adjusted by shell powder, and nitrate bacteria loaded on the fly ash ceramsite filter material perform enhanced nitration reaction, so that the content of nitrate nitrogen in the outlet water of the enhanced denitrification tank is improved. The method takes nitrate nitrogen as an electron acceptor in the UASB reactor and takes a carbon source in the wastewater as an electron donor, and improves the denitrification reaction efficiency of the UASB reactor and enhances the biological denitrification effect by improving the content of the nitrate nitrogen of the inlet water of the reactor. The invention combines the MBBR reaction tank, the enhanced denitrification tank and the UASB reactor, so that the overall removal rate of COD and TN reaches more than 95 percent.
The town domestic sewage treatment system and the resource utilization method have low investment cost, can save water by more than 50t per year and produce agricultural fertilizer of more than 100kg per year, and can supplement energy sources by using the biogas generated by the UASB reactor. The method is particularly suitable for newly-built communities, and a septic tank can be omitted. The process is green and environment-friendly, can realize resource utilization of water resources and excrement, and is suitable for old cell reconstruction and new cell construction.
Drawings
FIG. 1 is a schematic structural diagram of a town domestic sewage treatment system of the present invention.
Detailed Description
The first embodiment is as follows: the town domestic sewage treatment system comprises a closestool 1, a sewage storage tank 3, a rotting fertilizer device 8, a water storage tank 11, a bathing device 13, a vegetable washing tank 14, an MBBR reaction tank 19, a reinforced denitrification tank 21 and an UASB reactor 24, wherein a water outlet of the closestool 1 is connected with a water inlet of the sewage storage tank 3 through a first pipeline, a solid-liquid separator 18 is arranged in the sewage storage tank 3, a water outlet of the sewage storage tank 3 is connected with a feed inlet of the rotting fertilizer device 8 through a second pipeline, one end of a third pipeline 15 extends into a liquid phase area of the solid-liquid separator 18, the other end of the third pipeline 15 is communicated with the first water inlet of the water storage tank 11, and a suction device 5 is arranged on the third pipeline 15;
the water outlet of the bathing device 13 is communicated with the second water inlet of the water storage tank 11 through a fourth pipeline 16, and the water outlet of the vegetable washing tank 14 is communicated with the third water inlet of the water storage tank 11 through a fifth pipeline 17;
the effluent of the water storage tank 11 sequentially flows into an MBBR reaction tank 19, an enhanced denitrification tank 21 and a UASB reactor 24 through water pipes, wherein the bottom of the MBBR reaction tank 19 is provided with an aeration device 20, and the MBBR reaction tank 19 is filled with suspended fillers; the reinforced denitrification tank 21 is internally provided with a shell powder filler 22 and a fly ash ceramsite filter material 23, and the fly ash ceramsite filter material 23 is loaded with nitrobacteria; the UASB reactor 24 is provided with a water distributor 25 at the bottom and a three-phase separator 26 at the top, and granular sludge is filled in the UASB reactor 24.
The second embodiment is as follows: the difference between the embodiment and the specific embodiment is that a stirrer 6 is arranged in a fertilizer decomposition device 8, and a feeding port 7 is arranged at the top of the fertilizer decomposition device 8.
In the embodiment, the decomposing inoculant is added into the fertilizer decomposing device through the feed inlet.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that the third pipeline 15, the fourth pipeline 16, and the fifth pipeline 17 are provided with the vent pipe 10, respectively.
The fourth concrete implementation mode: the present embodiment differs from one of the first to third embodiments in that a heat pump or heat exchanger 12 is further provided on the fourth line 16.
The fifth concrete implementation mode is as follows: the difference between this embodiment and the first to fourth embodiments is that the first pipeline is provided with a first valve 2, the second pipeline is provided with a second valve 4, and the third pipeline 15 is provided with a third valve 9.
The sixth specific implementation mode: this embodiment is different from one of the first to fifth embodiments in that mesh filters are provided on the third pipeline 15, the fourth pipeline 16, and the fifth pipeline 17, respectively.
This embodiment filters the solid phase pollutant of large granule through screen filter, avoids bulky solid phase pollutant to get into tank 11.
The seventh embodiment: the town domestic sewage treatment and resource utilization method is implemented according to the following steps:
1. flushing water of the closestool 1 flows into the sewage storage tank 3 through a first pipeline for excrement-water separation, solid-phase excrement enters the manure decomposing device 8 through a second pipeline for decomposition treatment, and the excrement water flows into the water storage tank 11 through a third pipeline 15;
2. the bath water generated by the bath device 13 flows into the water storage tank 11, and the temperature of the polluted water in the water storage tank 11 is raised by the bath water;
3. vegetable washing water generated in the vegetable washing tank 14 flows into the water storage tank 11 through a fifth pipeline 17;
4. the polluted water in the water storage tank 11 flows into an MBBR reaction tank 19 through a pipeline, an aeration device 20 carries out aeration treatment, and the hydraulic retention time in the MBBR reaction tank is controlled to be 6-10 h, so that nitrified sewage is obtained;
5. the nitrified sewage flows into an enhanced denitrification tank 21 for enhanced denitrification to obtain enhanced sewage;
6. the sewage after the strengthening treatment flows into the UASB reactor 24, the hydraulic retention time in the UASB reactor 24 is controlled to be 8-12 h under the anaerobic condition, and the purified water is discharged from the water outlet of the three-phase separator 26, thereby completing the treatment and resource utilization of the urban domestic sewage.
In the embodiment, the carbon-nitrogen ratio in the water storage tank 11 is adjusted to be 4-6 by using the liquid dung.
The embodiment adjusts (improves) NO of the water inlet of the UASB reactor by controlling the hydraulic retention time of the MBBR reaction tank and the enhanced denitrification tank 3 - -N content.
The specific implementation mode eight: the seventh embodiment is different from the seventh embodiment in that the temperature of the contaminated water in the storage tank 11 is controlled to be 24 to 33 ℃.
The specific implementation method nine: the seventh or eighth embodiment is different from the seventh or eighth embodiment in that the dissolved oxygen amount of the contaminated water in the MBBR reaction tank 19 is controlled to be 4 to 8mg/L.
The specific implementation mode is ten: the seventh embodiment is different from the seventh embodiment in that the enhanced denitrification time in the fifth embodiment is controlled to be 5 to 7 hours.
The concrete implementation mode eleven: the difference between the present embodiment and one of the seventh to the tenth embodiments is that the hydraulic retention time in the UASB reactor 24 in the sixth step is controlled to be 8 to 10 hours.
The first embodiment is as follows: the town domestic sewage treatment system comprises a closestool 1, a sewage storage tank 3, a rotting fertilizer device 8, a water storage tank 11, a bathing device 13, a vegetable washing tank 14, an MBBR reaction tank 19, a reinforced denitrification tank 21, an UASB reactor 24 and a quartz sand filter, wherein a water outlet of the closestool 1 is connected with a water inlet of the sewage storage tank 3 through a first pipeline, a solid-liquid separator 18 is arranged in the sewage storage tank 3, a discharge outlet (solid-phase substance outlet) of the sewage storage tank 3 is connected with a feed inlet of the rotting fertilizer device 8 through a second pipeline, a stirring device is arranged in the rotting fertilizer device 8, one end of a third pipeline 15 extends into a liquid phase region of the solid-liquid separator 18, the other end of the third pipeline 15 is communicated with the first water inlet of the water storage tank 11, and a suction device 5 is arranged on the third pipeline 15;
the water outlet of the bathing device 13 is communicated with the second water inlet of the water storage tank 11 through a fourth pipeline 16, and the water outlet of the vegetable washing tank 14 is communicated with the third water inlet of the water storage tank 11 through a fifth pipeline 17;
the effluent of the water storage tank 11 sequentially flows into an MBBR reaction tank 19, an enhanced denitrification tank 21 and a UASB reactor 24 through water pipes, wherein an aeration device 20 is arranged at the bottom of the MBBR reaction tank 19, and suspended fillers are filled in the MBBR reaction tank 19; the reinforced denitrification tank 21 is internally provided with a shell powder filler 22 and a fly ash ceramsite filter material 23, the fly ash ceramsite filter material 23 is positioned on the bearing layer, and the fly ash ceramsite filter material 23 is loaded with nitrobacteria; the bottom of the UASB reactor 24 is provided with a water distributor 25, the top is provided with a three-phase separator 26, the UASB reactor 24 is filled with granular sludge, and the water outlet of the UASB reactor 24 is also connected with a quartz sand filter.
In the embodiment, the method for loading the nitrobacteria on the fly ash ceramsite filter material comprises the steps of adding the nitrobacteria into clear water to prepare a bacterial liquid, then soaking the fly ash ceramsite filter material into the bacterial liquid, and drying to obtain the fly ash ceramsite filter material loaded with the nitrobacteria.
The application example is as follows: the method for treating domestic sewage by using the urban domestic sewage treatment system in the first embodiment of the present invention is implemented according to the following steps:
1. flushing water of the closestool 1 flows into the sewage storage tank 3 through a first pipeline for excrement-water separation, solid-phase excrement enters the manure decomposing device 8 through a second pipeline for decomposition treatment, and the excrement water flows into the water storage tank 11 through a third pipeline 15;
2. the bath water generated by the bath device 13 flows into the water storage tank 11, and the temperature of the polluted water in the water storage tank 11 is raised by the bath water;
3. vegetable washing water generated in the vegetable washing tank 14 flows into the water storage tank 11 through a fifth pipeline 17;
4. the polluted water in the water storage tank 11 flows into the MBBR reaction tank 19 through a pipeline, the water inlet temperature of the MBBR reaction tank 19 is controlled to be 30 ℃, the aeration device 20 carries out aeration treatment, the concentration of dissolved oxygen is 6mg/L, and the hydraulic retention time in the MBBR reaction tank is controlled to be 7h, so that nitrified sewage is obtained;
5. the nitrified sewage flows into an enhanced denitrification tank 21 for enhanced denitrification, and the hydraulic retention time is controlled to be 6 hours, so that the enhanced sewage is obtained;
6. the sewage after the strengthening treatment flows into a UASB reactor 24, the water temperature in the UASB reactor 24 is ensured to be 28 ℃ by utilizing the heat collected by a heat exchanger on a fourth pipeline 16, the concentration of sludge in the UASB reactor is 3300mg/L, the hydraulic retention time in the UASB reactor 24 is controlled to be 9h under the anaerobic condition, the purified water is discharged from a water outlet of a three-phase separator 26, and finally the purified water is filtered by a quartz sand filter, so that the treatment and resource utilization of the urban domestic sewage are completed.
NH in Water of this example 4 + -N is determined spectrophotometrically using a Nessler reagent, NO 3 -N is determined by UV spectrophotometry.
The carbon-nitrogen ratio of the sewage in the water storage tank 11 is adjusted by the liquid dung in the embodiment. The COD of the wastewater in the tank 11 in this embodiment is at steady state operation Cr 536mg/L, 145mg/L TN, NH 3 The COD in the effluent of the enhanced denitrification tank 21 is 113mg/L in N and 6.4mg/L in TP Cr Is 122.1mg/L, NH 4 + -N8.7 mg/L, NO 3 - N is 30.1mg/L, UASB reverseCOD in effluent of reactor Cr Is 20.3mg/L, NH 4 + N is 1.1mg/L, NO 3 - 4.3mg/L of-N and 0.2mg/L of TP.
If the town domestic sewage treatment system is not provided with the enhanced denitrification tank, NH in the effluent passing through the MBBR reaction tank 4 + -N and NO 3 - The ratio of-N is about 1. At this time, when the feed water (same alkalinity) COD of the UASB reactor is Cr 115.6mg/L, NH 4 + -N is 16.3mg/L, NO 3 - N is 19.6mg/L, and the effluent COD of the UASB reactor is 20 hours even if the hydraulic retention time of the UASB reactor is prolonged Cr Is 25.8mg/L, NH 4 + -N is 3.8mg/L, NO 3 - -N is 6.2mg/L.
The embodiment controls the hydraulic retention time of the MBBR reaction tank and the enhanced denitrification tank to be shorter, and improves NO in the inlet water of the UASB reactor by utilizing the nitrification of the enhanced denitrification tank 3 -N content, thereby enhancing the efficiency and effectiveness of biological denitrification in UASB reactors. The combination of the MBBR reaction tank, the enhanced denitrification tank and the UASB reactor ensures that the overall removal rate of COD and TN reaches more than 95 percent.
Claims (10)
1. The town domestic sewage treatment system is characterized by comprising a closestool (1), a sewage storage tank (3), a rotting fertilizer device (8), a water storage tank (11), a bathing device (13), a vegetable washing tank (14), an MBBR reaction tank (19), a reinforced denitrification tank (21) and a UASB reactor (24), wherein a water outlet of the closestool (1) is connected with a water inlet of the sewage storage tank (3) through a first pipeline, a solid-liquid separator (18) is arranged in the sewage storage tank (3), a water outlet of the sewage storage tank (3) is connected with a feed inlet of the rotting fertilizer device (8) through a second pipeline, one end of a third pipeline (15) extends into a liquid phase area of the solid-liquid separator (18), the other end of the third pipeline (15) is communicated with the first water inlet of the water storage tank (11), and a suction device (5) is arranged on the third pipeline (15);
the water outlet of the bathing device (13) is communicated with a second water inlet of the water storage tank (11) through a fourth pipeline (16), and the water outlet of the vegetable washing tank (14) is communicated with a third water inlet of the water storage tank (11) through a fifth pipeline (17);
effluent of the water storage tank (11) sequentially flows into an MBBR reaction tank (19), a reinforced denitrification tank (21) and a UASB reactor (24) through water pipes, wherein an aeration device (20) is arranged at the bottom of the MBBR reaction tank (19), and suspended filler is filled in the MBBR reaction tank (19); the reinforced denitrification tank (21) is internally provided with a shell powder filler (22) and a fly ash ceramsite filter material (23), and the fly ash ceramsite filter material (23) is loaded with nitrobacteria; the bottom of the UASB reactor (24) is provided with a water distributor (25), the top is provided with a three-phase separator (26), and the UASB reactor (24) is filled with granular sludge.
2. The town domestic sewage treatment system according to claim 1, wherein a stirrer (6) is arranged in the rotting fertilizer device (8), and a feed inlet (7) is formed at the top of the rotting fertilizer device (8).
3. The town domestic sewage treatment system according to claim 1, wherein the vent pipe (10) is provided on each of the third pipeline (15), the fourth pipeline (16) and the fifth pipeline (17).
4. The urban domestic sewage treatment system according to claim 1, wherein a heat pump or a heat exchanger (12) is further provided on the fourth line (16).
5. The town domestic sewage treatment system according to claim 1, wherein the first pipeline is provided with a first valve (2), the second pipeline is provided with a second valve (4), and the third pipeline (15) is provided with a third valve (9).
6. The town domestic sewage treatment and resource utilization method is characterized by being implemented according to the following steps:
1. toilet flushing water generated by a toilet (1) flows into a sewage storage tank (3) through a first pipeline for liquid-dung separation, solid-phase excrement enters a decomposition device (8) through a second pipeline for decomposition treatment, and liquid-dung flows into a water storage tank (11) through a third pipeline (15);
2. the bath water generated by the bath device (13) flows into the water storage tank (11), and the temperature of the polluted water in the water storage tank (11) is raised by the bath water;
3. vegetable washing water generated by the vegetable washing pool (14) flows into the water storage pool (11) through a fifth pipeline (17);
4. polluted water in the water storage tank (11) flows into the MBBR reaction tank (19) through a pipeline, an aeration device (20) carries out aeration treatment, and the hydraulic retention time in the MBBR reaction tank is controlled to be 6-10 h, so that nitrified sewage is obtained;
5. the nitrified sewage flows into an enhanced denitrification tank (21) for enhanced denitrification to obtain enhanced sewage;
6. the sewage after the strengthening treatment flows into a UASB reactor (24), the hydraulic retention time in the UASB reactor (24) is controlled to be 8-12 h under the anaerobic condition, and the purified water is discharged from a water outlet of a three-phase separator (26), thereby completing the treatment and resource utilization of the urban domestic sewage.
7. The town domestic sewage treatment and resource utilization method according to claim 6, characterized in that the temperature of the polluted water in the water storage tank (11) is controlled to be 24-33 ℃.
8. The town domestic sewage treatment and resource utilization method according to claim 6, wherein the dissolved oxygen amount of the polluted water in the MBBR reaction tank (19) is controlled to be 4-8 mg/L.
9. The town domestic sewage treatment and resource utilization method according to claim 6, wherein the enhanced denitrification time is controlled to be 5-7 hours in the fifth step.
10. The town domestic sewage treatment and resource utilization method according to claim 6, wherein in the sixth step, the hydraulic retention time in the UASB reactor (24) is controlled to be 8-10 h.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281285A (en) * | 1995-04-07 | 1996-10-29 | Toto Ltd | Purifying device |
| JP2004132037A (en) * | 2002-10-10 | 2004-04-30 | Toyota Auto Body Co Ltd | Circulating flushing toilet and sewage purification method of the circulating flushing toilet |
| CN102153235A (en) * | 2011-03-04 | 2011-08-17 | 吴建生 | Distributed treatment method and system for domestic sewage |
| CN203451328U (en) * | 2013-07-22 | 2014-02-26 | 葛奎 | Water-saving type domestic sewage treatment system |
| CN104291443A (en) * | 2014-10-12 | 2015-01-21 | 北京工业大学 | Device and method for treating low-carbon-nitrogen-ratio urban sewage by virtue of half nitrification/partial denitrification/anaerobic ammonium oxidation |
| CN111422983A (en) * | 2020-03-13 | 2020-07-17 | 河海大学 | Two-stage sewage treatment device and process of shortcut nitrification-anaerobic ammonia oxidation |
| CN114349281A (en) * | 2022-01-10 | 2022-04-15 | 生态环境部华南环境科学研究所 | Nitrogen and phosphorus removal treatment device for low-carbon-nitrogen-ratio polluted water and water treatment method |
| CN217148896U (en) * | 2022-02-23 | 2022-08-09 | 聂新宇 | Domestic water sewage treatment system |
-
2022
- 2022-10-18 CN CN202211274010.5A patent/CN115557643B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281285A (en) * | 1995-04-07 | 1996-10-29 | Toto Ltd | Purifying device |
| JP2004132037A (en) * | 2002-10-10 | 2004-04-30 | Toyota Auto Body Co Ltd | Circulating flushing toilet and sewage purification method of the circulating flushing toilet |
| CN102153235A (en) * | 2011-03-04 | 2011-08-17 | 吴建生 | Distributed treatment method and system for domestic sewage |
| CN203451328U (en) * | 2013-07-22 | 2014-02-26 | 葛奎 | Water-saving type domestic sewage treatment system |
| CN104291443A (en) * | 2014-10-12 | 2015-01-21 | 北京工业大学 | Device and method for treating low-carbon-nitrogen-ratio urban sewage by virtue of half nitrification/partial denitrification/anaerobic ammonium oxidation |
| CN111422983A (en) * | 2020-03-13 | 2020-07-17 | 河海大学 | Two-stage sewage treatment device and process of shortcut nitrification-anaerobic ammonia oxidation |
| CN114349281A (en) * | 2022-01-10 | 2022-04-15 | 生态环境部华南环境科学研究所 | Nitrogen and phosphorus removal treatment device for low-carbon-nitrogen-ratio polluted water and water treatment method |
| CN217148896U (en) * | 2022-02-23 | 2022-08-09 | 聂新宇 | Domestic water sewage treatment system |
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