ECBR sewage treatment process

Abstract

The invention discloses an ECBR sewage treatment process, and relates to the technical field of sewage treatment. The ECBR sewage treatment process comprises five steps of filtration treatment, water quality regulation, electrolytic treatment, degradation sedimentation and disinfection treatment. According to the ECBR sewage treatment process, the circulating aerobic tank is used for automatically finishing the previous dispersed procedures such as aerobic (aeration) and anaerobic circulation, clear water sludge separation and sludge reflux in one treatment tank, so that compared with a mode of needing a plurality of treatment tanks, the size of equipment is smaller, and meanwhile, the circulating aerobic tank does not utilize pump reflux, so that the equipment is convenient to use. The sludge is returned by water flow without smashing aerobic biomasses formed in the aerobic zone, so that the treatment capacity of the aerobic biomasses is improved, the circulating aerobic tank has efficient COD (Chemical Oxygen Demand) and ammonia nitrogen degradation treatment capacity, the reflux ratio of the sludge does not need to be manually controlled, the management is easy, and the cost is low. And the process and the equipment are suitable for areas which urgently need to solve the rural domestic sewage pollution problem and have less land and water resources.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an ECBR sewage treatment process. Background Art

[0002] At present, the domestic sewage treatment process technologies in my country still have their own defects. The traditional process has low efficiency in nitrogen and phosphorus removal; the sludge stability is poor; it operates in an intermittent cycle and has high requirements for automatic control; it is costly and consumes a lot of electricity. Therefore, the ECBR sewage treatment process is proposed. Summary of the invention

[0003] The object of the present invention is to provide an ECBR sewage treatment process to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: ECBR sewage treatment process, comprising the following steps: In step 1, filtering treatment: domestic sewage is collected from a pipe network and discharged into a filter tank, and three sets of filter screens need to be installed at the area where the domestic sewage passes through the filter tank, so that when the domestic sewage is transported, it can be initially filtered and large particles of impurities can be removed through the filter screen; Step 2: Water quality adjustment: Use a sewage pump to pump the domestic sewage filtered in step 1 into the regulating tank, then add a neutralizer into the regulating tank, and use an aeration device to aerate the sewage, which will promote the combination of carbon dioxide and water molecules, reduce the alkalinity of the sewage, and promote the respiration of microorganisms to produce acidic substances, thereby reducing the pH value and adjusting the water quality; Step 3: Electrolytic treatment: The sewage is pumped into the micro-electrolysis (physical and chemical) tank in the regulating tank, where the sewage is electrolyzed to break the molecular chains of some difficult-to-degrade substances; Step 4: Degradation and sedimentation: After the sewage comes out of the micro-electrolysis (physicochemical) tank, it enters the circulating aerobic tank to biodegrade the organic matter in the wastewater and settle the sludge; Step 5: Disinfection: The effluent from the circulating aerobic pool is disinfected with ultraviolet light to meet the discharge requirements.

[0005] Preferably, in the step 1, the pore size of the first filter screen is 50-80 mm, the pore size of the second filter screen is 6-40 mm, and the pore size of the third filter screen is 2-5 mm.

[0006] Preferably, when adjusting the water quality of the sewage in the regulating tank in step 2, a temperature detection device is required to monitor the temperature of the sewage, and the temperature is required to be between 24 and 30 degrees Celsius.

[0007] Preferably, when adjusting the water quality of the sewage in the regulating tank in step 2, it is necessary to use a dissolved oxygen detection device to monitor the dissolved oxygen concentration of the sewage, and the dissolved oxygen concentration is required to be between 4-6 mg. If the dissolved oxygen concentration is too low, the dissolved oxygen concentration can be increased by increasing the aeration time and increasing the aeration intensity.

[0008] Preferably, after the water quality of the sewage in the regulating tank is regulated in step 2, its pH value is required to be between 6.5 and 8.5.

[0009] Preferably, after the neutralizing agent is added to the regulating tank in step 2, a water pump is required to circulate the sewage in the regulating tank.

[0010] Preferably, in step 4, a small anoxic zone is formed by cutting off the vertical areas near the four sides in the aerobic tank, and the water flow driven by the gas will partially flow in from the upper part of the baffle. There is no oxygen supplement in this area, and the dissolved oxygen of the incoming mud-water mixture will decrease rapidly. When it settles to the bottom folding plate area, the dissolved oxygen is almost exhausted, and the products of ammonia oxidation in the aerobic zone are denitrified and denitrified here.

[0011] Preferably, a double-sided guide plate is added to one side of the anoxic zone in the aerobic pool in step 4, and the negative pressure formed between the guide plates by the water flow generated by the aeration rising airflow is used to automatically return the sludge from the sedimentation zone, replacing the traditional mechanical return. At the same time, the guide plate separates the treatment pool into an aerobic zone (aeration zone) and an anaerobic zone (sludge sedimentation, clean sewage diversion zone). Driven by the water flow, the sewage and sludge automatically circulate repeatedly between the aerobic zone and the anaerobic zone. Beneficial Effects

[0012] Compared with the prior art, the present invention provides an ECBR sewage treatment process, which has the following beneficial effects: 1. The ECBR sewage treatment process adopts electrochemical technology to electrolyze sewage, and electrolysis breaks bonds, breaks walls and performs physicochemical treatment on macromolecular organic matter in sewage, thereby electrolyzing macromolecular organic matter into small molecular organic matter and inorganic matter; among which small molecular organic matter floats up to the next biochemical treatment step, providing carbon source for subsequent biochemical treatment, thereby improving the efficiency of subsequent biochemical treatment, and the circulating aerobic tank of this process automatically completes the previously dispersed processes such as aerobic (aeration) and anaerobic circulation, clean water sludge separation, and sludge return in one treatment tank. Compared with the method that requires the use of multiple treatment tanks, the volume of the equipment is smaller. At the same time, the circulating aerobic tank does not use pump return, but uses water flow to return sludge without breaking up the aerobic biological groups formed in the aerobic zone, thereby improving the treatment capacity of the aerobic biological groups, and the circulating aerobic tank has a high efficiency in degrading COD and ammonia nitrogen treatment capacity, does not need to manually control the return ratio of sludge, and is easy to manage.

[0013] 2. In the ECBR sewage treatment process, the sludge can be deposited in the anoxic zone of the aerobic tank, which is easy to accumulate specialized bacteria, prevent the muddy water from flowing out quickly, and allow it to have a certain residence time to allow denitrification to fully react, so that the water flow has a more reasonable flow state, prevent the muddy water or gas water from flowing back and destroy the anoxic environment. After the transformation, a main aerobic zone and four anoxic zones are formed in the same aerobic reactor. After aeration, most of the sludge is in the aerobic zone for carbon oxidation and ammonia oxidation. A small part of the muddy water mixture will flow into the anoxic zone with the water flow. The newly generated nitrite and nitrate can use the sufficient carbon source for denitrification, which greatly increases the denitrification efficiency, saves energy consumption, and improves economic benefits. The process has the advantages of strong impact resistance, low energy consumption, simple maintenance and management, and quick results. It is suitable for areas that urgently need to solve the problem of rural domestic sewage pollution and have less land and water resources. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0015] The ECBR sewage treatment process comprises the following steps: in step 1, filtering treatment: domestic sewage is collected from the pipe network and discharged into the filter tank, and three sets of filter screens need to be installed at the area where the domestic sewage passes through the filter tank. When the domestic sewage is transported, it can be initially filtered and large particles of impurities can be removed through the filter screen. The aperture of the first filter screen in step 1 is 50 mm, the aperture of the second filter screen is 6, and the aperture of the third filter screen is 2; Step 2, water quality adjustment: the domestic sewage filtered in step 1 is pumped into the regulating tank using a sewage pump, and then a neutralizer is added to the regulating tank, and an aeration device is used to aerate the sewage, and then the combination of carbon dioxide and water molecules is promoted to reduce the alkalinity of the sewage, and the respiration of microorganisms can also be promoted to produce acidic substances, which can reduce the pH value and adjust the water quality. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a temperature detection device to monitor the temperature of the sewage, and the temperature is required to be 24 degrees Celsius. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a dissolved oxygen detection device to monitor the dissolved oxygen concentration of the sewage, and the dissolved oxygen concentration is required to be between 4mg. If the dissolved oxygen concentration is too low, the dissolved oxygen concentration can be increased by increasing the aeration time and increasing the aeration intensity. After the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, its pH value is required to be 6.5. After the neutralizer is added to the regulating tank in step 2, a water pump is required to circulate the sewage in the regulating tank; Step 3: Electrolytic treatment: The sewage is pumped into the micro-electrolysis (physical and chemical) tank in the regulating tank, where the sewage is electrolyzed to break the molecular chains of some difficult-to-degrade substances; Step 4, degradation and sedimentation: after the sewage comes out of the micro-electrolysis (physicochemical) pool, it enters the circulating aerobic pool to biodegrade the organic matter in the wastewater and settle the sludge. In step 4, a small anoxic zone is formed by cutting off the vertical area near the four sides of the aerobic pool, and the water flow, driven by the gas, will partially flow in from the upper part of the baffle. There is no oxygen supplement in this area, and the dissolved oxygen of the mud-water mixture entering will decrease rapidly. When it settles to the bottom folding plate area, the dissolved oxygen is almost exhausted. The product of ammonia oxidation in the aerobic zone is denitrified here. In step 4, a double-sided guide plate is added to one side of the anoxic zone in the aerobic pool. The negative pressure formed by the water flow generated by the aeration rising airflow between the guide plates is used to make the sludge automatically return from the sedimentation area, replacing the traditional mechanical return. At the same time, the guide plate separates the treatment pool into an aerobic zone (aeration zone) and an anaerobic zone (sludge sedimentation, clean sewage diversion zone). The sewage and sludge are driven by the water flow and automatically circulate repeatedly between the aerobic zone and the anaerobic zone; Step 5: Disinfection: The effluent from the circulating aerobic pool is disinfected with ultraviolet light to meet the discharge requirements. Embodiment 2

[0016] The ECBR sewage treatment process comprises the following steps: in step 1, filtering treatment: domestic sewage is collected from the pipe network and discharged into the filter tank, and three sets of filter screens need to be installed at the area where the domestic sewage passes through the filter tank. When the domestic sewage is transported, it can be initially filtered and large particles of impurities can be removed through the filter screen. The aperture of the first filter screen in step 1 is 65 mm, the aperture of the second filter screen is 23 mm, and the aperture of the third filter screen is 3.5 mm; Step 2, water quality adjustment: the domestic sewage filtered in step 1 is pumped into the regulating tank using a sewage pump, and then a neutralizer is added to the regulating tank, and an aeration device is used to aerate the sewage, and then the combination of carbon dioxide and water molecules is promoted to reduce the alkalinity of the sewage, and the respiration of microorganisms can also be promoted to produce acidic substances, which can reduce the pH value and adjust the water quality. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a temperature detection device to monitor the temperature of the sewage, and the temperature is required to be 27 degrees Celsius. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a dissolved oxygen detection device to monitor the dissolved oxygen concentration of the sewage, and the dissolved oxygen concentration is required to be between 5mg. If the dissolved oxygen concentration is too low, the dissolved oxygen concentration can be increased by increasing the aeration time and increasing the aeration intensity. After the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, its pH value is required to be 7.5. After the neutralizer is added to the regulating tank in step 2, a water pump is required to circulate the sewage in the regulating tank; Step 3: Electrolytic treatment: The sewage is pumped into the micro-electrolysis (physical and chemical) tank in the regulating tank, where the sewage is electrolyzed to break the molecular chains of some difficult-to-degrade substances; Step 4, degradation and sedimentation: after the sewage comes out of the micro-electrolysis (physicochemical) pool, it enters the circulating aerobic pool to biodegrade the organic matter in the wastewater and settle the sludge. In step 4, a small anoxic zone is formed by cutting off the vertical area near the four sides of the aerobic pool, and the water flow, driven by the gas, will partially flow in from the upper part of the baffle. There is no oxygen supplement in this area, and the dissolved oxygen of the mud-water mixture entering will decrease rapidly. When it settles to the bottom folding plate area, the dissolved oxygen is almost exhausted. The product of ammonia oxidation in the aerobic zone is denitrified here. In step 4, a double-sided guide plate is added to one side of the anoxic zone in the aerobic pool. The negative pressure formed by the water flow generated by the aeration rising airflow between the guide plates is used to make the sludge automatically return from the sedimentation area, replacing the traditional mechanical return. At the same time, the guide plate separates the treatment pool into an aerobic zone (aeration zone) and an anaerobic zone (sludge sedimentation, clean sewage diversion zone). The sewage and sludge are driven by the water flow and automatically circulate repeatedly between the aerobic zone and the anaerobic zone; Step 5: Disinfection: The effluent from the circulating aerobic pool is disinfected with ultraviolet light to meet the discharge requirements. Embodiment 3

[0017] The ECBR sewage treatment process comprises the following steps: in step 1, filtering treatment: domestic sewage is collected from the pipe network and discharged into the filter tank, and three sets of filter screens need to be installed at the area where the domestic sewage passes through the filter tank. When the domestic sewage is transported, it can be initially filtered and large particles of impurities can be removed by passing through the filter screen. The aperture of the first filter screen in step 1 is 80 mm, the aperture of the second filter screen is 40 mm, and the aperture of the third filter screen is 5 mm; Step 2, water quality adjustment: the domestic sewage filtered in step 1 is pumped into the regulating tank using a sewage pump, and then a neutralizer is added to the regulating tank, and an aeration device is used to aerate the sewage, and then the combination of carbon dioxide and water molecules is promoted to reduce the alkalinity of the sewage, and the respiration of microorganisms can also be promoted to produce acidic substances, which can reduce the pH value and adjust the water quality. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a temperature detection device to monitor the temperature of the sewage, and the temperature is required to be 30 degrees Celsius. When the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, it is necessary to use a dissolved oxygen detection device to monitor the dissolved oxygen concentration of the sewage, and the dissolved oxygen concentration is required to be between 6mg. If the dissolved oxygen concentration is too low, the dissolved oxygen concentration can be increased by increasing the aeration time and increasing the aeration intensity. After the sewage in the regulating tank in step 2 is adjusted to adjust the water quality, its pH value is required to be 8.5. After the neutralizer is added to the regulating tank in step 2, a water pump is required to circulate the sewage in the regulating tank; Step 3: Electrolytic treatment: The sewage is pumped into the micro-electrolysis (physical and chemical) tank in the regulating tank, where the sewage is electrolyzed to break the molecular chains of some difficult-to-degrade substances; Step 4, degradation and sedimentation: after the sewage comes out of the micro-electrolysis (physicochemical) pool, it enters the circulating aerobic pool to biodegrade the organic matter in the wastewater and settle the sludge. In step 4, a small anoxic zone is formed by cutting off the vertical area near the four sides of the aerobic pool, and the water flow, driven by the gas, will partially flow in from the upper part of the baffle. There is no oxygen supplement in this area, and the dissolved oxygen of the mud-water mixture entering will decrease rapidly. When it settles to the bottom folding plate area, the dissolved oxygen is almost exhausted. The product of ammonia oxidation in the aerobic zone is denitrified here. In step 4, a double-sided guide plate is added to one side of the anoxic zone in the aerobic pool. The negative pressure formed by the water flow generated by the aeration rising airflow between the guide plates is used to make the sludge automatically return from the sedimentation area, replacing the traditional mechanical return. At the same time, the guide plate separates the treatment pool into an aerobic zone (aeration zone) and an anaerobic zone (sludge sedimentation, clean sewage diversion zone). The sewage and sludge are driven by the water flow and automatically circulate repeatedly between the aerobic zone and the anaerobic zone; Step 5: Disinfection: The effluent from the circulating aerobic pool is disinfected with ultraviolet light to meet the discharge requirements.

[0018] It can be seen that some sewage treatment processes have low nitrogen and phosphorus removal efficiency, poor sludge stability, intermittent cycle operation, high requirements for automatic control, high cost and high power consumption. The ECBR sewage treatment process uses electrochemical technology to electrolyze sewage, and electrolysis breaks bonds, breaks walls and physicochemically treats large molecular organic matter in sewage, thereby electrolyzing large molecular organic matter into small molecular organic matter and inorganic matter; the small molecular organic matter floats up to the next biochemical treatment step, providing a carbon source for subsequent biochemical treatment, thereby improving the efficiency of subsequent biochemical treatment, and the circulating aerobic tank of this process automatically completes the previously dispersed processes such as aerobic (aeration) and anaerobic circulation, clean water sludge separation, and sludge return in one treatment tank. Compared with the method that requires the use of multiple treatment tanks, the size of the equipment is smaller. At the same time, the circulating aerobic tank does not use a pump to return, but uses water flow to return sludge without breaking up the aerobic biological clusters formed in the aerobic zone, thereby improving the treatment capacity of the aerobic biological clusters, and the circulating aerobic tank has The high efficiency of COD and ammonia nitrogen degradation treatment capacity does not require manual control of the sludge return ratio, and it is easy to manage. Furthermore, the ECBR sewage treatment process can deposit sludge in the anoxic zone of the aerobic tank, which is easy to accumulate specialized bacteria, prevent the rapid outflow of muddy water, and allow it to have a certain residence time to allow denitrification to fully react, so that the water flow has a more reasonable flow state, prevent muddy water or gas water from flowing back and destroying the anoxic environment. After the transformation, a main aerobic zone and four anoxic zones are formed in the same aerobic reactor. After aeration, most of the sludge is in the aerobic zone for carbon oxidation and ammonia oxidation. A small part of the mud-water mixture will flow into the anoxic zone with the water flow. The newly generated nitrite and nitrate can use sufficient carbon source for denitrification, which greatly increases the denitrification efficiency, saves energy consumption, and improves economic benefits. The process integrates the advantages of strong impact resistance, low energy consumption, simple maintenance and management, and quick results. It is suitable for areas that urgently need to solve the problem of rural domestic sewage pollution and have less land and water resources.

Claims

1. ECBR sewage treatment process, characterized in that: The following steps are involved: In step 1, filtration treatment: the domestic sewage is collected from the pipe network and discharged into the filter pool. At the same time, three sets of filter nets need to be installed in the area where the domestic sewage passes through the filter pool. When the domestic sewage is transported, it can be initially filtered and large particles of impurities can be removed through the filter net; Step 2: Water quality adjustment: Use a sewage pump to pump the domestic sewage filtered in step 1 into the regulating tank, then add a neutralizer into the regulating tank, and use an aeration device to aerate the sewage, which will promote the combination of carbon dioxide and water molecules, reduce the alkalinity of the sewage, and promote the respiration of microorganisms to produce acidic substances, thereby reducing the pH value and adjusting the water quality; Step 3: Electrolytic treatment: The sewage is pumped into the micro-electrolysis (physical and chemical) tank in the regulating tank, where the sewage is electrolyzed to break the molecular chains of some difficult-to-degrade substances; Step 4: Degradation and sedimentation: After the sewage comes out of the micro-electrolysis (physicochemical) tank, it enters the circulating aerobic tank to biodegrade the organic matter in the wastewater and settle the sludge; Step 5: Disinfection: The effluent from the circulating aerobic pool is disinfected with ultraviolet light to meet the discharge requirements.

2. The ECBR sewage treatment process according to claim 1, characterized in that: The aperture of the first filter in step 1 is 50-80 mm, the aperture of the second filter is 6-40 mm, and the aperture of the third filter is 2-5 mm.

3. The ECBR sewage treatment process according to claim 1, characterized in that: When adjusting the water quality of the sewage in the regulating tank in the step 2, it is necessary to use a temperature detection device to monitor the temperature of the sewage, and the temperature is required to be 24-30 degrees Celsius.

4. The ECBR sewage treatment process according to claim 3, characterized in that: When adjusting the water quality of the sewage in the regulating tank in step 2, it is necessary to use dissolved oxygen detection equipment to monitor the dissolved oxygen concentration of the sewage. The dissolved oxygen concentration is required to be between 4-6 mg. If the dissolved oxygen concentration is too low, the dissolved oxygen concentration can be increased by increasing the aeration time and increasing the aeration intensity.

5. The ECBR sewage treatment process according to claim 4, characterized in that: After the sewage in the regulating tank is regulated in step 2, its pH value is required to be between 6.5 and 8.

5.

6. The ECBR sewage treatment process according to claim 5, characterized in that: After the neutralizing agent is added to the regulating tank in step 2, a water pump is required to circulate the sewage in the regulating tank.

7. The ECBR sewage treatment process according to claim 6, characterized in that: In the step 4, a small anoxic zone is formed by cutting off the vertical areas near the four sides in the aerobic tank, and the water flow driven by the gas will partially flow in from the upper part of the baffle. There is no oxygen supplement in this area, and the dissolved oxygen of the incoming mud-water mixture will decrease rapidly. When it settles to the bottom folding plate area, the dissolved oxygen is almost exhausted, and the products of ammonia oxidation in the aerobic zone are denitrified and denitrified here.

8. The ECBR sewage treatment process according to claim 1, characterized in that: In the aerobic pool in step 4, a double-sided guide plate is added to one side of the anoxic zone, and the negative pressure formed between the guide plates by the water flow generated by the aeration rising airflow is used to make the sludge automatically return from the sedimentation zone, replacing the traditional mechanical return. At the same time, the guide plate separates the treatment pool into an aerobic zone (aeration zone) and an anaerobic zone (sludge sedimentation, clean sewage diversion zone). Driven by the water flow, the sewage and sludge automatically circulate repeatedly between the aerobic zone and the anaerobic zone.