CN112408598A - Independent aeration two-section self-circulation combined tower and process for treating high-concentration organic wastewater - Google Patents
Independent aeration two-section self-circulation combined tower and process for treating high-concentration organic wastewater Download PDFInfo
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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
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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
- C02F7/00—Aeration of stretches of water
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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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- 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
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- 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
Abstract
The invention relates to an independent aeration two-section self-circulation combined tower for treating high-concentration organic wastewater, which comprises a water inlet pipe, an anaerobic column, an aeration column, an aerobic column and a water outlet pipe, wherein an aeration disc is arranged in the aeration column; granular sludge is cultured in both the anaerobic column and the aerobic column; under the action of pressure difference and liquid level difference, the wastewater realizes the circular flow between the aerobic column and the aeration column, and the wastewater realizes the removal of organic matters through anaerobic reaction and aerobic discovery. The independent aeration two-section self-circulation combined tower further realizes the circular flow of the wastewater in front of the aeration column and the aerobic column, does not need external power and reduces the energy consumption in the process of treating the high-concentration organic wastewater. The wastewater is circularly treated for dozens to hundreds of times, so that the effluent is ensured to reach the discharge standard.
Description
Technical Field
The invention relates to a high-concentration organic wastewater treatment combined tower and a process, in particular to an independent aeration two-section self-circulation combined tower and a process for treating high-concentration organic wastewater, which aim at the treatment of the high-concentration organic wastewater and make the wastewater reach the standard for discharge or reuse by utilizing the functions of anaerobic granular sludge and aerobic granular sludge.
Background
The current treatment process of high concentration organic wastewater usually aims to remove high concentration organic pollutants in wastewater, and the pollutants (such as carbohydrate, grease, protein, etc.) in the wastewater can be degraded by microorganism to consume dissolved oxygen in the water, thereby affecting the growth of fish and other aquatic organisms.
The common aerobic biological methods for high-concentration organic wastewater have the problems of large energy consumption, long generation time, difficult culture, large excess sludge amount and the like, and the anaerobic method for treating the high-concentration organic wastewater has the defects of long starting time and poor effluent quality, so the aerobic method and the anaerobic method are generally combined for use. In practical application, the application of aerobic granular sludge is very rare, mainly because the traditional method has long culture time of the aerobic granular sludge, is difficult to stabilize, and has undefined control parameters.
The invention aims to invent a process device which can rapidly cultivate aerobic granular sludge, treat high-concentration organic wastewater by combining anaerobic granular sludge, independently arrange an aeration column and circulate the wastewater for dozens of times without adding power in a system so as to ensure that the wastewater reaches the discharge standard.
Disclosure of Invention
The invention provides an independent aeration two-section self-circulation combined tower and a process for treating high-concentration organic wastewater, aiming at overcoming the defects of the technical problems.
The invention relates to an independent aeration two-section self-circulation combined tower for treating high-concentration organic wastewater, which comprises a water inlet pipe, an anaerobic column, an aeration column, an aerobic column and a water outlet pipe, wherein the anaerobic column, the aeration column and the aerobic column are vertically arranged, the anaerobic column and the aerobic column are respectively positioned at two sides of the aeration column, the water inlet pipe is communicated with the bottom of the anaerobic column, and the high-concentration organic wastewater to be treated is pumped into the anaerobic column through the water inlet pipe under the action of a water pump; the bottom of the aeration column is provided with an aeration disc, the bottom of the aerobic column is provided with a water distribution pipe, a water outlet pipe is communicated with the upper part of the aerobic column, and the treated wastewater flows out through the water outlet pipe; the method is characterized in that: the upper part of the anaerobic column is provided with a connecting port communicated with the upper part of the aeration column, the aeration column is communicated with the water distribution pipe through a communicating column, the aerobic column is communicated with the aeration column through a reflux column, and the communicating column and the reflux column are both vertically arranged; the upper end of the communicating column is communicated with the upper part of the aeration column, the lower end of the communicating column is communicated with the water distribution pipe, the upper end of the reflux column is communicated with the upper end of the aerobic column, and the lower end of the reflux column is communicated with the lower part of the aeration column; granular sludge is cultured in both the anaerobic column and the aerobic column;
the aeration oxygenation of the aeration disc reduces the density of the wastewater at the bottom of the aeration column and reduces the pressure, the wastewater in the aerobic column enters the aeration column under the action of pressure difference, the wastewater in the aerobic column flows into the aeration column, so that the liquid level of the aeration column rises and the liquid level of the aerobic column falls, and the wastewater in the aeration column flows into the aerobic column under the action of liquid level difference, so that the wastewater circularly flows between the aeration column and the aerobic column; in the process that high-concentration organic wastewater flows from bottom to top in the anaerobic column, most organic matters are removed under the action of microorganisms in anaerobic granular sludge to generate methane; and removing COD in the water under the action of the biological matters in the aerobic granular sludge in the process that the oxygenated sewage flows from bottom to top in the aerobic column.
The invention relates to an independent aeration two-section self-circulation combined tower for treating high-concentration organic wastewater.
The independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater is characterized in that the water distribution pipe is annular, a plurality of downward water distribution holes are uniformly formed in the lower surface of the annular water distribution pipe, and all the water distribution holes are positioned in the same plane.
The independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater has the advantages that the diameters of the communication column and the reflux column are both larger than 200mm, and the upper end and the lower end of the communication column and the reflux column are both arc-shaped for reducing the head loss.
According to the independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater, the height-diameter ratio of the aerobic column ranges from 3 to 8.
The invention relates to a wastewater treatment process of an independent aeration two-section self-circulation combined tower for treating high-concentration organic wastewater, which is characterized by comprising the following steps of:
a) water inlet and anaerobic reaction, pumping the high-concentration organic wastewater to be treated into the bottom of the anaerobic column (2) through a water inlet pipe under the action of a water pump, fully contacting the wastewater with anaerobic microorganisms in anaerobic granular sludge in the process of uniformly rising in the anaerobic column from bottom to top, and removing most organic matters in the wastewater through the anaerobic reaction; under the action of the liquid level difference, the wastewater on the upper part of the anaerobic column enters the aeration column through the connecting port;
b) aeration and self-circulation, under the aeration action of the aeration disc, the wastewater at the bottom of the aeration column is aerated and oxygenated, the density of the aerated and oxygenated wastewater is reduced, the pressure intensity is reduced, the wastewater in the aerobic column enters the bottom of the aeration column under the action of pressure difference, the aeration enables the liquid level of the aeration column to rise, the wastewater in the aeration column enters the water distribution pipe through the communication column under the action of liquid level difference, and the aeration realizes the circular flow of the wastewater between the aeration column and the aerobic column without a power source;
c) water distribution and aerobic reaction, wherein waste water enters the water distribution pipe from the communicating column and is discharged through downward water distribution holes arranged on the water distribution pipe, so that uniform water distribution at the bottom of the aerobic column is realized; in the process that the wastewater uniformly rises from bottom to top in the water distribution pipe, the wastewater is fully contacted with aerobic microorganisms in the aerobic granular sludge, and the residual COD in the water is removed through aerobic reaction; in the process that the wastewater rises in the aerobic column, dissolved oxygen is consumed along with the removal of organic matters, and anoxic and anaerobic reactions occur at the upper part of the wastewater;
d) and returning and discharging water, wherein most of the wastewater treated by the aerobic column flows back to the aeration column through the return column, and the rest part is discharged through the water outlet pipe.
The wastewater treatment process of the independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater controls the inflow velocity and the aeration rate in a smaller range at the initial stage of wastewater treatment so as to realize the culture of anaerobic granular sludge in an anaerobic column and aerobic granular sludge in an aerobic column; and after the granular sludge is cultured, the inflow velocity and the aeration rate are restored to the normal range.
According to the wastewater treatment process of the independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater, the wastewater of the aerobic column rises and flows into the aerobic column for more than 20 m/h.
According to the wastewater treatment process of the independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater, the reflux amount of the wastewater in the aerobic column through the reflux column is dozens to hundreds of times of the water outlet amount through the water outlet pipe.
The invention has the beneficial effects that: the two-section self-circulation combined tower with independent aeration has the advantages that the anaerobic columns and the aerobic columns are arranged on two sides of the aeration column, the aeration column is communicated with the water distribution pipe at the bottom of the aerobic column through the communicating column, the aerobic column is communicated with the aeration column through the reflux column, so that under the aeration action of the aeration disc, aeration oxygenation and stirring of wastewater at the bottom of the aeration column are realized, the wastewater in the aerobic column flows into the aeration column under the action of pressure difference due to the fact that the density of the wastewater after aeration is reduced and the water pressure is reduced, the wastewater in the aerobic column flows into the aeration column, the liquid level of the aeration column is increased and the liquid level of the aerobic column is reduced after the wastewater in the aeration column flows into the aerobic column under the action of liquid level difference, the wastewater in the aeration column and the aerobic column circularly flows, external power is not needed, and energy consumption in the high-concentration organic wastewater treatment process is reduced.
High-concentration organic wastewater firstly enters the bottom of the anaerobic column, and in the process that the wastewater uniformly rises in the anaerobic column from bottom to top, the wastewater is fully contacted with anaerobic microorganisms in anaerobic granular sludge, most (usually up to 85%) organic matters in the water are removed through anaerobic reaction, and methane is generated; mixing the wastewater treated by the anaerobic reaction with return water, aerating and oxygenating, and then feeding the mixture into an aerobic column, wherein the wastewater is fully contacted with aerobic microorganisms in aerobic granular sludge in the process of uniformly rising in the aerobic column, residual COD in the water is removed through a sample reaction, most of the treated wastewater flows back through a return pipe (the backflow amount is dozens to hundreds of times of the water yield), and a small part of the treated wastewater is discharged and is subjected to circulating treatment for dozens to hundreds of times, so that the effluent is ensured to reach the discharge standard.
Drawings
FIG. 1 is a front view of an independently aerated two-stage self-circulating combination column of the present invention;
FIG. 2 is a rear view of the independently aerated two-stage self-circulating combination column of the present invention;
FIG. 3 is a top view of an independently aerated two-stage self-circulating combination column of the present invention;
FIG. 4 is a perspective view of an independent aeration two-stage self-circulation combination column of the present invention;
fig. 5 and 6 are sectional views of the independent aeration two-stage self-circulation combined tower of the invention.
In the figure: 1 water inlet pipe, 2 anaerobic columns, 3 aeration columns, 4 aerobic columns, 5 water outlet pipes, 6 connectors, 7 aeration discs, 8 communication columns, 9 water distribution pipes, 10 reflux columns, 11 sealing covers and 12 water distribution holes.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 to 4, a front view, a rear view, a top view and a perspective view of the independent aeration two-stage self-circulation combined tower of the invention are respectively given, and fig. 5 and 6 are given perspective views thereof, the independent aeration two-stage self-circulation combined tower is composed of a water inlet pipe 1, an anaerobic column 2, an aeration column 3, an aerobic column 4, a water outlet pipe 5, an aeration disc 7, a communication column 8, a water distribution pipe 9 and a reflux column 10, the anaerobic column 2, the aeration column 3 and the aerobic column 4 are all vertically arranged, the anaerobic column 2 and the aerobic column 4 are positioned at two sides of the aeration column 3, the water inlet pipe 1 is communicated with the bottom of the anaerobic column 2, high-concentration organic wastewater to be treated flows into the bottom of the anaerobic column 2 through the water inlet pipe 1 under the action of a water pump, a sealing cover 11 is arranged at the bottom of the anaerobic column 2 to ensure that the anaerobic column 2 is in a sealing state, and anaerobic granular sludge is cultured in.
The upper part of the anaerobic column 2 is communicated with the upper part of the aeration column 3 through a connecting port 6, a three-phase separator is arranged at the upper part of the anaerobic column 2, solid matters (flocculent sludge or granular sludge) separated by the three-phase separator are intercepted in the anaerobic column 2, liquid enters the aeration column 3 through the connecting port 6, gas is marsh gas generated in the anaerobic reaction stage of high-concentration organic wastewater, and the gas is collected by a marsh gas collecting device. The aeration disc 7 is arranged at the bottom of the aeration column 3, the aeration disc 7 is used for aerating and oxygenating the organic wastewater at the bottom of the aeration column 3, and the water distribution pipe 9 is provided with the bottom of the aerobic column 4 and is used for realizing the uniform distribution of the inflowing organic wastewater to the bottom of the aerobic column 4.
The aeration column 3 is communicated with a water distribution pipe 9 through a communicating column 8, the communicating column 8 is vertically arranged, the upper end of the communicating column 8 is communicated with the upper part of the aeration column 3, and the lower end of the communicating column 8 is communicated with the water inlet of the water distribution pipe 9. The water distribution pipe 9 is uniformly provided with a plurality of downward water distribution holes 12, the downward water outlet of the water distribution pipe 9 can disperse the sludge at the bottom of the aerobic column 4 to avoid sludge deposition, and simultaneously can avoid the blockage of the water distribution holes 12. The water distributor 9 may take the form of a ring. The water outlet pipe 5 is communicated with the upper part of the aerobic column 4, and the waste water after anaerobic and aerobic treatment is discharged through the water outlet pipe 5. Aerobic granular sludge is cultured in the aerobic column 4.
The aerobic column 4 is communicated with the aeration column 3 through a reflux column 10, the reflux column 10 is also vertically arranged, the upper end of the reflux column 10 is communicated with the upper part of the aerobic column 2, and the lower end of the reflux column 10 is communicated with the lower part of the aeration column 3. In the process that the aeration disc 7 aerates and oxygenizes the organic wastewater at the lower part of the aeration column 3, the wastewater is aerated and expanded, the density of the expanded wastewater is reduced, the pressure is reduced, and the wastewater in the aerobic column 4 flows into the aeration column 3 under the action of pressure difference. The sewage in the aerobic column 4 flows into the aeration column 3 to find the aeration column, so that the liquid level of the aeration column 3 rises and the liquid level of the aerobic column 4 falls, under the action of the liquid level difference, the wastewater at the upper part of the aeration column 3 enters the water distribution pipe 9 through the communication column 8, and enters the aerobic column 4 after being uniformly distributed by the water distribution pipe 9. Therefore, the organic wastewater circularly flows in front of the aeration column 3 and the aerobic column 4, an external power source is not needed, and the energy consumption in the wastewater treatment process is reduced.
High-concentration organic wastewater is pumped into the bottom of an anaerobic column 2 through a water inlet pipe 1 by a pump; the wastewater enters the bottom of the anaerobic column 2, fully contacts with the granular sludge in the anaerobic column and generates methane, and the wastewater flows upwards under the action of water pressure and methane disturbance. The anaerobic column 2 can bear high hydraulic load and generate gas quickly, so that the whole anaerobic column 2 is an anaerobic granular sludge bed, wastewater can be fully contacted with granular sludge, most organic matters are removed under the action of microorganisms, and the removal rate can reach more than 85 percent.
The aeration disc 7 in the aeration column 3 releases oxygen to carry out micropore aeration, so that dissolved oxygen in water is increased, the oxygen flushing efficiency in the aeration column 3 can directly influence the removal efficiency of organic matters, the better the oxygen flushing effect of wastewater is, the higher the dissolved oxygen is, the more COD can be consumed, and the better the removal effect of the organic matters is. The wastewater in the aerobic column 4 flows from bottom to top, the wastewater is fully contacted with aerobic granular sludge and flocculent sludge in the wastewater, and the residual organic matters are removed under the action of microorganisms. The wastewater in the aerobic column 4 has a fast rising flow rate which can reach more than 20m/h, and the suspended sludge in the tank can be granulated in a short time under the action of the upward shearing force of water flow and the like, and has the characteristics of smooth surface and compact structure, good settling property and capability of removing COD.
The dissolved oxygen at the bottom of the aerobic column 4 is the highest, and along with the removal of organic matters, the dissolved oxygen is also consumed, and the dissolved oxygen is lower as going upwards, so that the distribution of microorganisms at different heights is different, the generated reactions are also different, the aerobic reaction is generated at the bottommost part, the reaction rate is higher, and the reaction rate of the anoxic and anaerobic reactions generated at the upper part is lower. The rising flow rate of the wastewater in the aerobic column 4 is determined by factors such as the expansion rate of the wastewater in the aeration column 3, the height and the sectional area of the aerobic column 4 and the like, and the rising flow rate of the wastewater is larger when the expansion rate is higher, the height is higher, the sectional area is smaller, so the height-diameter ratio of the reaction column is larger and can reach 3-8.
The aerobic column 4 is started and operates at the initial stage of culturing the granular sludge, a large amount of suspended sludge exists, the suspended sludge with light weight and poor settling property exists on the upper part of the aerobic column 4 in large amount, most of the suspended sludge enters the reflux column 10 and continues to circulate in the system and may gradually become the granular sludge, a small part of the suspended sludge is discharged through the water outlet pipe 5, the suspended sludge is gradually reduced along with the formation of the granular sludge, and almost no suspended sludge exists after the combined column is completely started.
Most of the wastewater and the carried sludge on the upper part of the aerobic column 4 flow back to the aeration column 3 through the reflux column 10 for circulation, a small amount of wastewater flows out through the water outlet pipe 5, and the reflux amount is dozens to hundreds of times of the water outlet amount.
The wastewater in the aeration column 3 is subjected to micropore aeration, the expansion rate of 20-50% can be generated, the density of the wastewater at the lower end of the aeration column 3 is lower than that of the wastewater refluxed at the same liquid level in the reflux column 10, and pressure difference is generated, so that the wastewater can realize self-reflux without adding any external power, and the reflux amount can even reach hundreds of times of the inflow rate. The wastewater return flow is determined by the wastewater ascending flow velocity in the aerobic column 4 and the head loss in the wastewater flowing process, in order to reduce the head loss, the pipe diameters of the communication column 8 and the return column 10 are both larger (larger than 200 mm), and the right-angle connection is reduced as much as possible at the connecting port to use a bent pipe instead.
The wastewater treatment process of the independent aeration two-section self-circulation combined tower for treating the high-concentration organic wastewater is realized by the following steps:
a) water inlet and anaerobic reaction, pumping the high-concentration organic wastewater to be treated into the bottom of the anaerobic column (2) through a water inlet pipe under the action of a water pump, fully contacting the wastewater with anaerobic microorganisms in anaerobic granular sludge in the process of uniformly rising in the anaerobic column from bottom to top, and removing most organic matters in the wastewater through the anaerobic reaction; under the action of the liquid level difference, the wastewater on the upper part of the anaerobic column enters the aeration column through the connecting port;
b) aeration and self-circulation, under the aeration action of the aeration disc, the wastewater at the bottom of the aeration column is aerated and oxygenated, the density of the aerated and oxygenated wastewater is reduced, the pressure intensity is reduced, the wastewater in the aerobic column enters the bottom of the aeration column under the action of pressure difference, the aeration enables the liquid level of the aeration column to rise, the wastewater in the aeration column enters the water distribution pipe through the communication column under the action of liquid level difference, and the aeration realizes the circular flow of the wastewater between the aeration column and the aerobic column without a power source;
c) water distribution and aerobic reaction, wherein waste water enters the water distribution pipe from the communicating column and is discharged through downward water distribution holes arranged on the water distribution pipe, so that uniform water distribution at the bottom of the aerobic column is realized; in the process that the wastewater uniformly rises from bottom to top in the water distribution pipe, the wastewater is fully contacted with aerobic microorganisms in the aerobic granular sludge, and the residual COD in the water is removed through aerobic reaction; in the process that the wastewater rises in the aerobic column, dissolved oxygen is consumed along with the removal of organic matters, and anoxic and anaerobic reactions occur at the upper part of the wastewater;
d) and returning and discharging water, wherein most of the wastewater treated by the aerobic column flows back to the aeration column through the return column, and the rest part is discharged through the water outlet pipe.
Claims (9)
1. An independent aeration two-section self-circulation combined tower for treating high-concentration organic wastewater comprises a water inlet pipe (1), an anaerobic column (2), an aeration column (3), an aerobic column (4) and a water outlet pipe (5), wherein the anaerobic column, the aeration column and the aerobic column are vertically arranged, the anaerobic column and the aerobic column are respectively positioned at two sides of the aeration column, the water inlet pipe is communicated with the bottom of the anaerobic column, and the high-concentration organic wastewater to be treated is pumped into the anaerobic column through the water inlet pipe under the action of a water pump; the bottom of the aeration column is provided with an aeration disc (7), the bottom of the aerobic column is provided with a water distribution pipe (9), a water outlet pipe is communicated with the upper part of the aerobic column, and the treated wastewater flows out through the water outlet pipe; the method is characterized in that: the upper part of the anaerobic column is provided with a connecting port (6) communicated with the upper part of the aeration column, the aeration column is communicated with the water distribution pipe (9) through a communicating column (8), the aerobic column is communicated with the aeration column through a reflux column (10), and the communicating column and the reflux column are both vertically arranged; the upper end of the communicating column is communicated with the upper part of the aeration column, the lower end of the communicating column is communicated with the water distribution pipe, the upper end of the reflux column is communicated with the upper end of the aerobic column, and the lower end of the reflux column is communicated with the lower part of the aeration column; granular sludge is cultured in both the anaerobic column and the aerobic column;
the aeration oxygenation of the aeration disc reduces the density of the wastewater at the bottom of the aeration column and reduces the pressure, the wastewater in the aerobic column enters the aeration column under the action of pressure difference, the wastewater in the aerobic column flows into the aeration column, so that the liquid level of the aeration column rises and the liquid level of the aerobic column falls, and the wastewater in the aeration column flows into the aerobic column under the action of liquid level difference, so that the wastewater circularly flows between the aeration column and the aerobic column; in the process that high-concentration organic wastewater flows from bottom to top in the anaerobic column, most organic matters are removed under the action of microorganisms in anaerobic granular sludge to generate methane; and removing COD in the water under the action of the biological matters in the aerobic granular sludge in the process that the oxygenated sewage flows from bottom to top in the aerobic column.
2. The combined column of claim 1, wherein the column comprises: the upper part of the anaerobic column (2) is provided with a three-phase separator, solid matters separated by the three-phase separator are intercepted in the anaerobic column, separated liquid enters the aeration column (3) through a connecting port (6), and separated methane enters a methane collecting device.
3. The combined column of claim 1 or 2, characterized in that: the water distribution pipe (9) is annular, a plurality of water distribution holes (12) facing downwards are uniformly formed in the lower surface of the annular water distribution pipe, and all the water distribution holes are located in the same plane.
4. The combined column of claim 1 or 2, characterized in that: the diameters of the communication column (8) and the reflux column (10) are both larger than 200mm, and the upper ends and the lower ends of the communication column and the reflux column are both arc-shaped for reducing head loss.
5. The combined column of claim 1 or 2, characterized in that: the height-diameter ratio of the aerobic column (5) is 3-8.
6. A wastewater treatment process based on the independent aeration two-stage self-circulation combined tower for treating high-concentration organic wastewater in claim 1, which is characterized by comprising the following steps:
a) water inlet and anaerobic reaction, pumping the high-concentration organic wastewater to be treated into the bottom of the anaerobic column (2) through a water inlet pipe under the action of a water pump, fully contacting the wastewater with anaerobic microorganisms in anaerobic granular sludge in the process of uniformly rising in the anaerobic column from bottom to top, and removing most organic matters in the wastewater through the anaerobic reaction; under the action of the liquid level difference, the wastewater on the upper part of the anaerobic column enters the aeration column through the connecting port;
b) aeration and self-circulation, under the aeration action of the aeration disc, the wastewater at the bottom of the aeration column is aerated and oxygenated, the density of the aerated and oxygenated wastewater is reduced, the pressure intensity is reduced, the wastewater in the aerobic column enters the bottom of the aeration column under the action of pressure difference, the aeration enables the liquid level of the aeration column to rise, the wastewater in the aeration column enters the water distribution pipe through the communication column under the action of liquid level difference, and the aeration realizes the circular flow of the wastewater between the aeration column and the aerobic column without a power source;
c) water distribution and aerobic reaction, wherein waste water enters the water distribution pipe from the communicating column and is discharged through downward water distribution holes arranged on the water distribution pipe, so that uniform water distribution at the bottom of the aerobic column is realized; in the process that the wastewater uniformly rises from bottom to top in the water distribution pipe, the wastewater is fully contacted with aerobic microorganisms in the aerobic granular sludge, and the residual COD in the water is removed through aerobic reaction; in the process that the wastewater rises in the aerobic column, dissolved oxygen is consumed along with the removal of organic matters, and anoxic and anaerobic reactions occur at the upper part of the wastewater;
d) and returning and discharging water, wherein most of the wastewater treated by the aerobic column flows back to the aeration column through the return column, and the rest part is discharged through the water outlet pipe.
7. The wastewater treatment process of the independent aeration two-stage self-circulation combined tower for treating the high concentration organic wastewater according to claim 6, which is characterized in that: in the initial stage of wastewater treatment, the inflow velocity and the aeration rate are controlled within a small range so as to realize the culture of anaerobic granular sludge in an anaerobic column and aerobic granular sludge in an aerobic column; and after the granular sludge is cultured, the inflow velocity and the aeration rate are restored to the normal range.
8. The wastewater treatment process of the independent aeration two-stage self-circulation combined tower for treating the high concentration organic wastewater according to claim 6, which is characterized in that: the wastewater of the aerobic column rises and flows into the aerobic column for more than 20 m/h.
9. The wastewater treatment process of the independent aeration two-stage self-circulation combined tower for treating the high concentration organic wastewater according to claim 6, which is characterized in that: the return flow of the wastewater in the aerobic column through the return column is dozens to hundreds of times of the water outlet flow through the water outlet pipe.
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| PCT/CN2021/112507 WO2022100180A1 (en) | 2020-11-13 | 2021-08-13 | Aeration combination tower and method for treating organic wastewater |
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| WO2022100180A1 (en) * | 2020-11-13 | 2022-05-19 | 山东泰山自迩环保科技有限公司 | Aeration combination tower and method for treating organic wastewater |
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| CN105502657A (en) * | 2016-01-05 | 2016-04-20 | 北京化工大学 | Device and method for treating high-concentration ammonia-nitrogen wastewater in aeration-anaerobic circulation mode |
| CN111333191A (en) * | 2019-11-28 | 2020-06-26 | 恩格拜（武汉）生态科技有限公司 | Method for treating high-concentration organic wastewater by anaerobic-aerobic deep coupling |
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| WO2022100180A1 (en) * | 2020-11-13 | 2022-05-19 | 山东泰山自迩环保科技有限公司 | Aeration combination tower and method for treating organic wastewater |
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