Integrated system for micro-polluted water treatment

Abstract

The utility model discloses an integrated system for micro-polluted water treatment, belongs to the field of sewage treatment, and solves the problem of micro-pollution of rainwater collecting cellar water in rural areas. The device comprises a raw water tank, an ozone reaction tank, an aerobic filter tank and an anoxic filter tank which are sequentially arranged from top to bottom, the raw water tank is communicated with the ozone reaction tank through a water inlet pipe, the ozone reaction tank is communicated with the anoxic filter tank through a connecting pipe, and a middle water distribution plate is arranged between the top of the anoxic filter tank and the bottom of the aerobic filter tank. The anoxic filter is communicated with the aerobic filter through a middle water distribution plate, and the aerobic filter is connected with a main water outlet pipe. The system is designed into a whole and has the advantages of being small in occupied area, low in capital construction cost, simple and convenient to operate and the like. According to the utility model, an anoxic and aerobic alternate design is adopted, and an effluent backflow design is adopted, so that the device has excellent effects on nitrification of NH3-N, denitrification of NO3-N and denitrification of NO2-N.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sewage treatment, specifically relates to a kind of integrated system for micro-polluted water treatment. BACKGROUND

[0002] China northwest belongs to typical arid and semi-arid region, and low annual rainfall leads to water resource deficiency, and for remote rural areas, water supply pipeline system is difficult to cover, and part of regional domestic water comes from self-built rainwater collection cellar, and rainwater collection cellar is to collect and store rainwater collected from roof, hillside, courtyard etc., in the process that rainwater is collected and flows into rain cellar, part of animal manure, leaves will enter rainwater collection cellar along with rainwater, in addition, atmospheric waste gas and volatile pollutants are dissolved in falling rainwater, leading to the index such as COD Mn , NH3-N, turbidity in water exceeding standard, and it is micro-polluted water, and without treating these micro-polluted water, it can cause harm to resident life and health.

[0003] In view of the micro-pollution of rainwater collection cellar, the utility model discloses an integrated system for micro-polluted water treatment, which can treat micro-polluted water in rainwater collection cellar, and can provide reference for treatment of micro-polluted rainwater collection cellar in northwest rural areas, and has important significance for improving the quality of rainwater collection cellar water. INVENTION CONTENTS

[0004] The utility model discloses a kind of integrated systems for micro-polluted water treatment, to solve the problem of micro-pollution of rainwater collection cellar in rural areas.

[0005] The technical scheme of the utility model is as follows: an integrated system for micro-polluted water treatment, including raw water tank, ozone reaction pool, aerobic filter tank and anoxic filter tank arranged in sequence from top to bottom, the raw water tank and the ozone reaction pool are communicated by inlet pipe, the ozone reaction pool and the anoxic filter tank are communicated by connecting pipe, the top of the anoxic filter tank and the bottom of the aerobic filter tank are provided with intermediate water distribution plate, the anoxic filter tank is communicated with the aerobic filter tank by the intermediate water distribution plate, and the aerobic filter tank is connected with total outlet pipe.

[0006] As a further improvement of the utility model, it further includes a reflux tank, the total outlet pipe is connected with a first branch pipe and a second branch pipe, the first branch pipe is provided with a first branch pipe valve, and the second branch pipe is connected to the reflux tank, the reflux tank is connected with a reflux pipe, the reflux pipe is connected to the connecting pipe, and the reflux pipe is provided with a reflux pump.

[0007] As a further improvement of the utility model, the reflux pipe is provided with a reflux valve.

[0008] As a further improvement of the utility model, the reflux water tank is connected with a backwashing main pipe, a backwashing pump is arranged on the backwashing main pipe, two backwashing branch pipes are connected to the aerobic filter tank and the anoxic filter tank respectively.

[0009] As a further improvement of the utility model, the reflux water tank is connected with a first vent pipe, a first vent valve is arranged on the first vent pipe; the connecting pipe is connected with a second vent pipe through a second tee joint, a second vent valve is arranged on the second vent pipe; a third vent pipe is arranged at the bottom of the ozone reaction tank, and a third vent valve is arranged on the third vent pipe.

[0010] As a further improvement of the utility model, the ozone reaction tank is connected with an ozone generator through an ozone pipe, an upward flow baffle and a downward flow baffle are arranged in the ozone reaction tank from the water inlet side to the water outlet side in sequence, the water inlet pipe is connected to the lower part of the ozone reaction tank, and the connecting pipe is connected to the upper part of the ozone reaction tank.

[0011] As a further improvement of the utility model, the aerobic filter tank is sequentially provided with an aerobic filter tank supporting layer, an aerobic filter tank water distribution plate and an aerobic filter tank filter material layer from bottom to top.

[0012] As a further improvement of the utility model, the anoxic filter tank is sequentially provided with an anoxic filter tank supporting layer, an anoxic filter tank water distribution plate and an anoxic filter tank filter material layer from bottom to top.

[0013] As a further improvement of the utility model, the utility model further comprises a gas supply pump, the output end of the gas supply pump is connected with a gas supply main pipe, the gas supply main pipe is connected with two gas supply branch pipes, and the two gas supply branch pipes are connected to the aerobic filter tank supporting layer of the aerobic filter tank and the anoxic filter tank supporting layer of the anoxic filter tank respectively.

[0014] As a further improvement of the utility model, the upper part of the aerobic filter tank is connected with a first overflow pipe, the upper part of the anoxic filter tank is provided with a second overflow pipe, an overflow valve is arranged on the second overflow pipe, and the first overflow pipe and the second overflow pipe are connected to an overflow main pipe.

[0015] The utility model has the advantages that:

[0016] 1. The utility model sets the system in a top-down form in elevation, maximally utilizes the raw water inlet water head, avoids energy input and reduces system energy consumption.

[0017] 2. The traditional water treatment system usually adopts a downward flow filter tank, the anoxic filter tank and the aerobic filter tank in the utility model adopt upward flow filter tanks, the water head advantage of the raw water elevation is utilized, the filtration speed is high, the water treatment capacity is large, the filter material has strong pollution carrying capacity, water loss is small, the filtration cycle is long, the backwashing frequency is low, and the operation energy consumption is reduced.

[0018] 3. The utility model discloses the alternate design of the lack of oxygen and the good oxygen, and adopt the design of the water backflow, and has excellent effect to the nitrification of NH3-N, the denitrification of NO3-N and NO2-N. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the data graph of the removal of COD of the utility model embodiment 2 Mn Removal condition data graph;

[0021] Figure 3 It is the data graph of the removal of NH3-N of the utility model embodiment 2;

[0022] Figure 4 It is the data graph of the removal of TN of the utility model embodiment 2.

[0023] In the drawing: 1-raw water tank;101-inlet pipe;102-inlet flowmeter;103-inlet valve;2-ozone generator;201-ozone pipe;202-ozone flowmeter;203-ozone valve;3-ozone reaction tank;301-upward flow baffle;302-downward flow baffle;305-connection pipe;306-third vent pipe;307-third vent valve;4-oxygenated filter tank;401-oxygenated filter tank filter material layer;402-oxygenated filter tank support layer;403-oxygenated filter tank water distribution plate;404-intermediate water distribution plate;405-total outlet pipe;406-first overflow pipe;407-total outlet valve;408-first branch pipe;409-first branch pipe valve;410-second branch pipe;5-anoxic filter tank;501-anoxic filter tank filter material layer;502-anoxic filter tank support layer;503-anoxic filter tank water distribution plate;505-second overflow pipe;506-overflow valve;507-overflow main pipe;6-backflow tank;601-first vent pipe;602-backflow pump;603-backflow valve;604-backflow flowmeter;605-first tee joint;606-backflow pipe;607-first vent valve;701-backflushing pump;702-backflushing main pipe;703-backflushing branch pipe;704-backflushing valve;801-gas supply pump;802-gas supply main pipe;803-gas supply branch pipe;804-air flowmeter;805-gas supply valve;901-second tee joint;902-second vent pipe;903-second vent valve. DETAILED DESCRIPTION

[0024] The utility model will be described in detail below in connection with the drawings.

[0025] Embodiment 1,

[0026] AsFigure 1 As shown in the figure, an integrated system for micro-polluted water treatment comprises, from top to bottom, a raw water tank 1, an ozone reaction tank 3, an aerobic filter tank 4 and an anoxic filter tank 5. The raw water tank 1 and the ozone reaction tank 3 are connected by a water inlet pipe 101, and the water inlet pipe 101 is provided with a water inlet valve 103 and a water inlet flowmeter 102. The ozone reaction tank 3 and the anoxic filter tank 5 are connected by a connecting pipe 305. An intermediate water distribution plate 404 is arranged between the top of the anoxic filter tank 5 and the bottom of the aerobic filter tank 4, and the anoxic filter tank 5 is connected to the aerobic filter tank 4 through the intermediate water distribution plate 404. The aerobic filter tank 4 is connected to a total water outlet pipe 405, and the total water outlet pipe 405 is provided with a total water outlet valve 407.

[0027] The system further comprises a backflow water tank 6. The total water outlet pipe 405 is connected to a first branch pipe 408 and a second branch pipe 410 at the end thereof. The first branch pipe 408 is provided with a first branch pipe valve 409, and the second branch pipe 410 is connected to the backflow water tank 6. The backflow water tank 6 is connected to a backflow pipe 606, and the backflow pipe 606 is connected to the connecting pipe 305 through a first three-way joint 605. The backflow pipe 606 is provided with a backflow valve 603 and a backflow flowmeter 604.

[0028] The backflow pipe 606 is provided with a backflow valve 603 and a backflow flowmeter 604.

[0029] The backflow water tank 6 is connected to a backwashing total pipe 702, and the backwashing total pipe 702 is provided with a backwashing pump 701. The backwashing total pipe 702 is connected to two backwashing branch pipes 703, and the two backwashing branch pipes 703 are respectively connected to the bottom of the aerobic filter tank 4 and the bottom of the anoxic filter tank 5. The backwashing branch pipes 703 are provided with backwashing valves 704.

[0030] The backflow water tank 6 is connected to a first vent pipe 601, and the first vent pipe 601 is provided with a first vent valve 607. The connecting pipe 305 is connected to a second vent pipe 902 through a second three-way joint 901, and the second vent pipe 902 is provided with a second vent valve 903. The bottom of the ozone reaction tank 3 is provided with a third vent pipe 306, and the third vent pipe 306 is provided with a third vent valve 307.

[0031] The ozone reaction tank 3 is connected to an ozone generator 2 through an ozone pipe 201, and the ozone pipe 201 is provided with an ozone valve 203 and an ozone flowmeter 202. The ozone reaction tank 3 is provided with an upward flow baffle 301 and a downward flow baffle 302 from the water inlet side to the water outlet side. The water inlet pipe 101 is connected to the lower part of the ozone reaction tank 3, and the connecting pipe 305 is connected to the upper part of the ozone reaction tank 3.

[0032] The aerobic filter tank 4 is provided with an aerobic filter support layer 402, an aerobic filter water distribution plate 403 and an aerobic filter filter material layer 401 from bottom to top. The aerobic filter support layer 402 is filled with a layer of goose pebbles with a particle size of 4-8 mm and a thickness of 5 cm. The aerobic filter filter material layer 401 is filled with biological ceramic with a particle size of 2-4 mm.

[0033] The anoxic filter 5 is sequentially provided with an anoxic filter supporting layer 502, an anoxic filter water distribution plate 503 and an anoxic filter material layer 501 from bottom to top. The anoxic filter supporting layer 502 is filled with a layer of pebbles with a particle size of 4-8 mm and a thickness of 10 cm; and the anoxic filter material layer 501 is filled with biological ceramsite with a particle size of 2-4 mm.

[0034] The filter material is selected to be ceramsite which has large mechanical strength and specific surface area, is easy to obtain and low in price. The flow state of water flow through the ceramsite filter material is good, and the ceramsite filter material has good adsorption and retention effect on suspended substances in the water inlet, and has no toxic and harmful effect on the growth and reproduction of microorganisms and long service life.

[0035] The system further comprises a gas supply pump 801, the output end of the gas supply pump 801 is connected with a gas supply main pipe 802, the gas supply main pipe 802 is connected with two gas supply branch pipes 803, the two gas supply branch pipes 803 are respectively connected to the aerobic filter supporting layer 402 of the aerobic filter 4 and the anoxic filter supporting layer 502 of the anoxic filter 5, and the gas supply branch pipe 803 is provided with a gas supply valve 805 and an air flow meter 804.

[0036] The aerobic filter 4 is connected with a first overflow pipe 406 at the upper portion, the first overflow pipe 406 is higher than the total water outlet pipe 405, the anoxic filter 5 is provided with a second overflow pipe 505 at the upper portion, the second overflow pipe 505 is provided with an overflow valve 506, and the first overflow pipe 406 and the second overflow pipe 505 are connected to an overflow main pipe 507.

[0037] In the embodiment, backflow is not performed, and the backflow pump 602 and the backflow valve 603 are closed.

[0038] When the system is normally operated, the backwashing pump 701, the backwashing valve 704, the second air release valve 903, the third air release valve 307 and the overflow valve 506 are not opened. The gas supply pump 801 and the gas supply valve 805 connected to the aerobic filter 4 are opened to supply gas to the aerobic filter 4. The gas supply valve 805 connected to the anoxic filter 5 is closed.

[0039] The volume ratio of the aerobic filter 4 to the anoxic filter 5 is 3.0:2.0.

[0040] The water supply and gas supply flow ratio of the aerobic filter 4 is 3.0:1.0.

[0041] The water in the raw water tank 1 flows into the ozone reaction tank 3 through the water inlet pipe 101 by gravity, the ozone generator 2 provides ozone to the ozone reaction tank 3 through the ozone pipe 201, the water in the ozone reaction tank 3 flows in "S" shape by turning over the upward flow baffle 301 and the downward flow baffle 302 in turn and then enters the anoxic filter tank 5 through the connecting pipe 305 after ozone treatment. In the anoxic filter tank 5, the water passes through the anoxic filter supporting layer 502, the anoxic filter water distribution plate 503 and the anoxic filter material layer 501 in turn, and then enters the aerobic filter tank 4 through the intermediate water distribution plate 404. In the aerobic filter tank 4, the water passes through the aerobic filter supporting layer 402, the aerobic filter water distribution plate 403 and the aerobic filter material layer 401 in turn, and finally flows out through the total water outlet pipe 405 and the first branch pipe 408. Part of the water flows into the backflow water tank 6 through the second branch pipe 410 for backwashing of the system.

[0042] When backwashing of the anoxic filter tank 5 and the aerobic filter tank 4 is needed, the water inlet valve 103, the total water outlet valve 407, the ozone generator 2 and the ozone valve 203 are closed. The backwashing pump 701, the backwashing valve 704, the air supply pump 801, the air supply valve 805 and the overflow valve 506 are opened. The water in the backflow water tank 6 enters the anoxic filter tank 5 and the aerobic filter tank 4 through the backwashing main pipe 702 and the backwashing branch pipe 703 for backwashing; air enters the anoxic filter tank 5 and the aerobic filter tank 4 through the air supply main pipe 802 and the air supply branch pipe 803 for blowing, which is coordinated with the backwashing. The backwashing water is collected to the overflow main pipe 507 through the second overflow pipe 505 and the first overflow pipe 406 for discharge; finally, the second air release valve 903 is opened to release the residual water in the aerobic filter tank 4 and the anoxic filter tank 5 through the second air release pipe 902.

[0043] When the system is overhauled, the water in the backflow water tank 6 is released through the first air release pipe 601, and the water in the ozone reaction tank 3 is released through the third air release pipe 306.

[0044] Example 2,

[0045] The difference between this example and Example 1 is that backflow is performed.

[0046] When the system is normally operated, the backflow water pump 602 and the backflow valve 603 are opened. The backflow water pump 602 provides water backflow at a ratio of 200%, and the hydraulic load of the system is 0.92m 3 / (m 2(h). Water entering the return water tank 6 flows out through the return pipe 606 and mixes with the water in the connecting pipe 305 before entering the anoxic filter 5. The nitrogen in the influent mainly exists in the form of ammonia nitrogen, which is removed by nitrification in the aerobic filter 4. However, the concentrations of NO3-N and NO2-N will increase in the effluent, meaning that TN in the system cannot be completely removed. Therefore, the NO3-N and NO2-N oxidized in the aerobic filter 4 are returned to the upstream anaerobic filter for denitrification in the anaerobic section to reduce the TN concentration in the system.

[0047] In this embodiment, the COD of the system influent Mn The concentration ranged from 6.01 to 8.52 mg / L, with an average concentration of 6.88 mg / L. After one month of operation, the system's effluent COD... Mn The average concentration was 2.89 mg / L, and the average removal rate was 58.4% (COD). Mn The concentration of the effluent meets the requirements of the "Standards for Drinking Water Quality" (GB5749-2022) (below 3 mg / L). For specific data, please refer to [link / reference needed]. Figure 2 The influent NH3-N concentration was 0.94~1.59 mg / L, with an average concentration of 1.27 mg / L. After one month of operation, the average effluent NH3-N concentration was 0.13 mg / L, with an average removal rate of 90.8%. The effluent NH3-N concentration met the requirements of the "Standards for Drinking Water Quality" (GB5749-2022) (below 0.5 mg / L). For detailed data, please refer to [link / reference needed]. Figure 3 The influent TN concentration ranged from 1.79 to 4.71 mg / L, with an average concentration of 2.72 mg / L. After one month of operation, the average TN concentration in the effluent was 1.30 mg / L, with an average removal rate of 51.1%. For detailed data, please refer to [link to relevant data]. Figure 4 The system influent turbidity is 1.8~5.2 NTU, with an average of 3.7 NTU. The average effluent turbidity is 0.7 NTU, with an average removal rate of 77.5%. The effluent turbidity meets the requirements of the "Standards for Drinking Water Quality" (GB5749-2022) (turbidity <1 NTU).

[0048] This invention boasts a series of advantages, including simple process structure, low investment, low cost, convenient operation and management, and high processing efficiency. By vertically arranging and stacking the system, it effectively utilizes the water head of each level of the pool, avoids energy input, and results in low system energy consumption and low COD. Mn It has a good removal effect on pollutants such as turbidity, NH3-N, and TN.

Claims

1. An integrated system for treating slightly polluted water, characterized in that: The system includes a raw water tank (1), an ozone reaction tank (3), an aerobic filter (4), and an anoxic filter (5) arranged from top to bottom. The raw water tank (1) and the ozone reaction tank (3) are connected by an inlet pipe (101). The ozone reaction tank (3) and the anoxic filter (5) are connected by a connecting pipe (305). An intermediate water distribution plate (404) is provided between the top of the anoxic filter (5) and the bottom of the aerobic filter (4). The anoxic filter (5) is connected to the aerobic filter (4) through the intermediate water distribution plate (404). The aerobic filter (4) is connected to a main outlet pipe (405).

2. The integrated system for treating slightly polluted water according to claim 1, characterized in that: It also includes a return water tank (6); the end of the main outlet pipe (405) is connected to a first branch pipe (408) and a second branch pipe (410), the first branch pipe (408) is provided with a first branch pipe valve (409), and the second branch pipe (410) is connected to the return water tank (6); the return water tank (6) is connected to a return pipe (606), the return pipe (606) is connected to a connecting pipe (305), and the return pipe (606) is provided with a return water pump (602).

3. The integrated system for treating slightly polluted water according to claim 2, characterized in that: A reflux valve (603) is provided on the reflux pipe (606).

4. An integrated system for treating slightly polluted water according to claim 2 or 3, characterized in that: The return water tank (6) is connected to a backwash main pipe (702), and a backwash pump (701) is provided on the backwash main pipe (702). The backwash main pipe (702) is connected to two backwash branch pipes (703), which are respectively connected to the aerobic filter (4) and the anoxic filter (5).

5. An integrated system for treating slightly polluted water according to claim 4, characterized in that: The return water tank (6) is connected to a first vent pipe (601), and a first vent valve (607) is installed on the first vent pipe (601); the connecting pipe (305) is connected to a second vent pipe (902) through a second tee connector (901), and a second vent valve (903) is installed on the second vent pipe (902); a third vent pipe (306) is installed at the bottom of the ozone reaction tank (3), and a third vent valve (307) is installed on the third vent pipe (306).

6. An integrated system for treating slightly polluted water according to claim 1, characterized in that: The ozone reaction tank (3) is connected to an ozone generator (2) via an ozone pipe (201). The tank (3) is equipped with an upward flow baffle (301) and a downward flow baffle (302) in sequence from the inlet side to the outlet side. The inlet pipe (101) is connected to the lower part of the ozone reaction tank (3), and the connecting pipe (305) is connected to the upper part of the ozone reaction tank (3).

7. An integrated system for treating slightly polluted water according to claim 1, characterized in that: The aerobic filter (4) is provided with an aerobic filter support layer (402), an aerobic filter water distribution plate (403), and an aerobic filter media layer (401) from bottom to top.

8. An integrated system for treating slightly polluted water according to claim 7, characterized in that: The anoxic filter (5) is provided with an anoxic filter support layer (502), an anoxic filter water distribution plate (503) and an anoxic filter media layer (501) from bottom to top.

9. An integrated system for treating slightly polluted water according to claim 8, characterized in that: It also includes an air supply pump (801), the output end of which is connected to an air supply main pipe (802), and the air supply main pipe (802) is connected to two air supply branch pipes (803). The two air supply branch pipes (803) are respectively connected to the aerobic filter support layer (402) of the aerobic filter (4) and the anoxic filter support layer (502) of the anoxic filter (5).

10. An integrated system for treating slightly polluted water according to claim 1, characterized in that: The aerobic filter (4) is connected to a first overflow pipe (406) at the top, and the anoxic filter (5) is provided with a second overflow pipe (505) at the top. An overflow valve (506) is provided on the second overflow pipe (505). The first overflow pipe (406) and the second overflow pipe (505) are connected to the overflow main pipe (507).

Images