CN102249479B - Sewage treatment facility and process - Google Patents

Abstract

The activated sludge sewage treatment facility of the present invention is composed of an anoxic reaction chamber, an aerobic reaction chamber and a filtration and clarification chamber connected in sequence. After the sewage enters the anoxic reaction chamber, it is mixed with a large amount of activated sludge returned from the filtration and clarification chamber, and then flows into the aerobic reaction chamber. In the aerobic reaction chamber, a large number of bacteria, fungi and microorganisms metabolize to form suspended objects under the action of aeration, oxygen synthesis and decomposition. The sludge inlet of the filter clarification chamber is used to control the flow of sewage from the aerobic reaction chamber. There is another sludge outlet at the bottom of the filtration and clarification chamber, which is used to return the sludge to the anoxic reaction chamber, mix with the sewage entering the anoxic reaction chamber, and start a new round of the same treatment process as the above process. The clean water flows out through the clean water overflow weir at the top of the filter clarification chamber. The invention has the advantages of compact structure, small occupied area, good energy saving and emission reduction effect, and can be widely used in various sewage treatment industries, especially in vast small and medium cities, development zones, scattered towns, tourist attractions and other places.

Description

A sewage treatment facility and treatment process

technical field

The ASBF of the present invention is used in sewage treatment, specifically, it is a complete set of facilities and a method for improving sewage treatment effect

technical background

99% of the existing water reserves on the earth are seawater and polar ice that are not suitable for human use, and the remaining 1% is mostly below 800 meters. The water in rivers and lakes that people rely on for survival only accounts for 0.01% of the total. Global freshwater resources are not only in short supply but also extremely uneven in regional distribution.

Due to China's unprecedented rapid development and insufficient awareness of environmental protection, coupled with the large population's large demand for water resources and sewage discharge, China is currently facing a very severe shortage of water resources. Zhongyuan is a country with severe water shortage. The total fresh water resources are 2.8 trillion cubic meters, accounting for 6% of global water resources, ranking fourth in the world, but the per capita is only 2,300 cubic meters, which is only 1/4 of the world's average level. , 1/5 of the United States, ranked 121st in the world, and is one of the 13 countries with the poorest per capita water resources in the world. The available fresh water resources are even less, only about 1.1 trillion cubic meters, and the per capita usable water resources are about 900 cubic meters, and the distribution is extremely uneven. By the end of the 20th century, 400 of the more than 600 cities in the country had Many cities have insufficient water supply, among which there are 110 cities with serious water shortages, and the total water shortage in cities across the country is about 6 billion cubic meters.

According to monitoring, the groundwater in most cities across the country is currently subject to a certain degree of point and surface pollution, and there is a trend of increasing year by year. The increasingly serious water pollution not only reduces the use function of water bodies, but also further exacerbates the contradiction of water resource shortage, which has a serious impact on the sustainable development strategy being implemented in my country, and also seriously threatens the safety of drinking water for urban residents and the safety of the people. healthy. Many rivers across the country have been seriously polluted by industrial wastewater; the fusion of urban sewage, rainwater, and a small amount of high-concentration industrial wastewater has seriously caused the existing sewage treatment plants to run overloaded, some of which have only undergone primary treatment, and some have not been treated and are directly discharged; There are eutrophication problems, resulting in an imbalance in the ecological environment. The equipment of sewage treatment plants built in the 1960s and 1970s is aging and the requirements for standard upgrading and renovation of existing sewage treatment plants are urgent. The coverage of sewage plants and pipe networks is insufficient. The efficiency of sewage treatment needs to be improved. The construction of sludge treatment and disposal facilities is seriously lagging behind. Rural transfers have exacerbated the difficulty of rural pollution treatment.

The existing sewage treatment process basically includes: physical method, chemical method, physicochemical method; biological method; natural method and sludge treatment device. Among the most basic and commonly used sewage treatment processes, biological method and biological method + membrane technology are more popular. The latter is to achieve reclaimed water reuse, so the cost is higher.

As far as the most common and commonly used biological method is concerned, like the traditional oxidation ditch biological treatment process (hereinafter referred to as oxidation ditch), A2/O, mud-water separation is usually due to the sedimentation of gravity separation from top to bottom to diffuse the sludge and water overflow. The definition of this kind of sedimentation is to first introduce the activated sludge into the clarification chamber and then add the sedimentation method that attracts the sludge by gravity.

The main problems with these methods are:

The first point is insufficient:

1. It requires a large area of filtration and sedimentation tanks, and the size determines whether there is enough space for sedimentation. Moreover, the entire sewage treatment process requires facilities such as aeration tanks, anaerobic tanks and filter sedimentation tanks, so the overall civil construction area is very large;

2. It takes time for precipitation, filtration and separation;

3. Due to the low quality of the sludge produced in the recycling process, the sludge does not necessarily have to settle, and the sludge will float or suspend in the clean water, and the quality of the clean water will be turbid;

4. Conventionally, due to the low concentration of activated sludge, the generation of sludge waste is greatly increased, which will increase the subsequent treatment costs.

The second disadvantage: the traditional process needs to invest in more equipment, thus consuming considerable energy and causing more operators to participate. Like oxidation ditch, BAF (explosive biological filter treatment method) and MBR (membrane biological reaction method), they require high-power consumption mixers, aerators, and large-scale mechanized gravity pumps, especially BAF needs more backwash pumps, Regularly flush the filter sedimentation system.

The third point is insufficient: In terms of water reuse and recovery, the filtration, clarification and separation effects of some processes are not very high, such as BAF (explosive biological filter treatment method), SBR (sequential accumulation activated sludge treatment method) and MBR membrane biotechnology, they require:

1. There are generally many sewage treatment equipment and expensive equipment prices, resulting in high power consumption and requiring all-weather, 365-day-a-year operators to work non-stop. The MBR membrane technology is particularly high, and it is inseparable from the all-weather computer monitoring system.

2. MBR membrane process and SBR (sequential activated sludge treatment method) need to add chemicals to the sewage treatment system, which increases the operating cost. MBR needs to add drugs to dissolve the dirt blocking the membrane filter to improve the filtration effect; while SBR, in order to improve the precipitation effect, needs to add drugs to reduce nitrogen and add redundant filter equipment to remove phosphorus.

The fourth deficiency: some sewage treatment processes often need to be in the off and on state during the cycle process.

1. Such as the BAF process, it is often necessary for the operator to backwash the sand filter on a regular basis;

2. MBR requires operators to clean the membrane filter every day;

3. The SBR process has only one pool, so it needs to wait in each sewage treatment cycle: waiting for full sewage, waiting for sedimentation and filtration, waiting for clean water discharge, and waiting for idleness.

To sum up, in order to maximize strengths and avoid weaknesses, in order to find a sewage treatment process suitable for China's national conditions and improve the requirements for environmental protection and sustainable development, as well as the need for energy conservation and emission reduction, the rapid rise of small and medium-sized cities and the trend of rural urbanization today , and the vast number of remote tourist attractions, hotels, industrial development zones, resorts, nursing homes, country houses and airport sewage treatment needs, so innovative technology is even more important. It should have the following basic conditions:

1. Nitrification and denitrification for efficient nitrogen and phosphorus reduction;

2. Efficiently degrade organic matter, remove particles in sewage and reduce TSS (total suspended particles) and COD (chemical oxygen demand) indicators;

3. High efficiency, new type, economical and applicable, less construction investment, less equipment investment, small land occupation and low operating cost;

4. Efficient water recovery and reuse;

5. Recycling and utilization of sewage in remote small and medium-sized cities, towns, villages, tourist attractions, agriculture, development zones, etc.;

6. Systematic, large-scale and modular development direction:

7. Satisfy the on-site technical transformation and ultra-low energy-saving operation of the existing aging and huge energy-consuming sewage treatment plants.

Contents of the invention

In order to solve the problem that the existing sewage treatment equipment in our country is outdated, the treatment effect is not ideal, and it is far from meeting the requirements of environmental protection, this invention proposes a new sewage treatment facility and treatment method using biochemical technology.

The invention proposes an ASBF (activated) sludge sewage treatment facility and process.

The structure of its sludge sewage treatment facility is:

The present invention is a cuboid pool composed of three parts: a) an anoxic reaction chamber on which a sewage inlet pipe is arranged; b) an aerobic reaction chamber connected with the anoxic reaction chamber; c) Filtration clarification chamber between the anoxic reaction chamber and the aerobic reaction chamber. The first interface of the filtration and clarification chamber is located between the anoxic reaction chamber and the filtration and clarification chamber, the second interface is located between the filtration and clarification chamber and the aerobic reaction chamber, and the third interface is vertically connected with the first and second interfaces, There is a distance from the shell of the cuboid pool as a narrow channel connecting the anoxic reaction chamber and the aerobic reaction chamber. The three interfaces together with the shell and the bottom surface on the other side constitute the filtration and clarification chamber. Both the first interface and the second interface are inclined inwardly from top to bottom, so that the longitudinal section of the filtration and clarification chamber is trapezoidal. There are one or several sludge inlets below the second interface in the filtration and clarification chamber for introducing the sludge from the aerobic reaction chamber into the filtration and clarification chamber. The anoxic reaction chamber of the present invention is provided with an activated sludge reflux device, and the device is: a sludge outlet is provided at the lower part of the first interface of the filter clarification chamber, and the sludge outlet is connected with an activated sludge return pipe leading into the anoxic reaction chamber, It is used to circulate the return sludge flowing from the filter clarification chamber into the anoxic reaction chamber, and at the same time export excess sludge to the external sludge storage chamber. There is a set of baffle diversion grooves on the upper part of the filtration and clarification chamber to intercept and collect all floating suspended debris. A clear water overflow weir is arranged in the middle of the diversion groove of the baffle to discharge filtered and clarified clean clear water to the outside. Outside the sewage inlet at the lower part of the second interface of the filtration and clarification chamber, at the bottom of the aerobic reaction chamber, a bubble baffle is fixed to prevent air bubbles from entering the filtration and clarification chamber.

The two main inventive devices of this process are: the baffle plate located at the bottom of the aerobic reaction chamber to block air bubbles, which controls the impact force of the air in the aerobic reaction chamber on the sludge bed of the filtration and clarification chamber; The baffle diversion tank, which automatically controls and collects all the scum and sundries that may float on the surface of the clean water.

Treatment process of the present invention:

The ASBF invention is a technological process for filtering and clarifying sewage through anoxic reaction chamber, aerobic reaction chamber, filtration clarification chamber and activated sludge bed. After entering the anoxic reaction chamber, the sewage is mixed with a large amount of activated sludge returned from the filtration and clarification chamber, and then flows into the aerobic reaction chamber through the narrow channel connecting the anoxic reaction chamber and the aerobic reaction chamber.

In the aerobic reaction chamber, a large number of bacteria, fungi and microorganisms (animals) quickly swallow a large amount of organic matter under the action of aeration, oxygenation and decomposition, and quickly form suspended matter through aeration and metabolism, that is, bacteria secrete The resulting viscous polysaccharides are activated sludge (suspended floc) with a huge surface area. The suspended floc is introduced into the filtration and clarification chamber through one or several sludge inlets below the aerobic reaction chamber.

In the filtration and clarification chamber, this improved clarification and separation method is a filter bed sewage treatment process formed by strengthening activated sludge upward. Due to the trapezoidal vertically widening structure of the filtration and clarification chamber, its unique V-shaped gravity effect, the sludge introduced from the bottom of the filtration and clarification chamber vertically decreases the force of the water flow impacting the sludge filter bed, and at the same time, the high-concentration sludge bed Rapidly absorb and filter the sludge that flows upwards to increase its thickness, thereby accelerating the filtration, sedimentation and clarification, so that the activated sludge with good oxidation, decomposition of organic matter and good coagulation and sedimentation performance can be used in a short period of time. Quickly absorb suspended solids in sewage and filter sediment within a short period of time, and the floating objects or floating flocs gather together to form clusters. When the weight of the agglomerate is greater than the vertical velocity lifting force, since the upward section of the filter clarification chamber gradually increases, the agglomerate gradually decreases upwards, and they fall to the bottom of the filter clarification chamber; forming the best, ideal, longitudinal downward filtration to complete the sewage purification process. And the unique trapezoidal longitudinal sectional area increases the formation of mud-water separation space, so as to achieve clearer water flowing out through the clear water overflow weir above the filtration and clarification chamber, and most of the concentrated sludge after adsorption and precipitation passes through activated sludge The return pipe returns to the anoxic reaction chamber to mix with the sewage entering the anoxic reaction chamber, and starts a new round of the same cycle treatment process as the above process; at the same time, the activated sludge return pipe transports the collected excess sludge to the external sludge pantry.

Main points of the present invention:

1. The compactness and scientificity of the ASBF invention process is reflected in its reasonable process

1. The three interfaces of the filtration and clarification chamber of the special trapezoidal device are shared and separated from the anoxic reaction chamber and the aerobic reaction chamber, forming three very compact and independent cuboid containers. The civil construction area is reduced. Because the filtration and clarification chamber has the flexibility of being oversized, overloaded, and overloaded, compared with the existing traditional gravity sedimentation method, the size of the filtration and clarification chamber can be saved by 50%;

2. Since this invention is both interconnected and mutually restrictive, it does not take time to settle unlike traditional gravity precipitation;

3. Upflow sludge bed filtration sewage treatment process is a filter bed process formed by upward flow strengthening activated sludge instead of the traditional gravity sedimentation method. Due to the unique design of the trapezoid, it longitudinally reduces the force of the upward water flow hitting the activated sludge filter bed, and at the same time increases the sludge's full force, rapid downward sedimentation and adsorption speed, thus forming a thicker and thicker sludge bed. The optimal, ideal, vertically downward sedimentation, filtration and clarification process formed by its self-control, coupled with the design of trapezoidal longitudinal section area widening upwards, increases the formation of mud-water separation space. So as to achieve clearer water flowing out through the overflow weir above the filter clarification chamber;

4. Due to the more efficient mud-water separation effect and the repeated circulation of high-quality, high-concentration and high-compression activated sludge and repeated mixing with the sewage in the anoxic reaction chamber, less sludge waste is produced.

2. The integration, efficiency, economy and compactness of the ASBF invention process require only the least equipment for auxiliary operation. Unique, compact design with minimal replacement of moving parts and modular construction requiring only limited mixers, air aerators (not power-hungry pumps), thus requiring little power consumption and minimal operating personnel and minimal operating expenses. Compared with the traditional sewage treatment process, the equipment investment is reduced by at least 30%; the operator is reduced by at least 50%; in terms of energy consumption: compared with the oxidation ditch process, at least 30% of energy consumption is saved; compared with the SBR process, at least Energy consumption can be saved by more than 60%; compared with the MBR membrane process, the operating cost can be saved by at least 50%.

3. The invention of ASBF is a model of creating a natural and green model of environmental protection

During the operation, due to self-regulation and control, it can achieve high-efficiency nitrogen removal and phosphorus reduction without adding any chemical drugs. Using activated sludge to reduce COD (chemical oxygen demand), remove TSS (total suspended solids) and biological nitrogen and phosphorus removal methods to remove nitrogen (N), ammonia nitrogen (NH3), and phosphorus (P) sewage treatment methods can be used in Nitrification and denitrification wastewater treatment methods remove these nutrients. In the nitrification process of the aerobic reaction chamber, the microbial group is used as a catalyst to convert nitrogen and ammonia into nitrate and nitrite; in the denitrification process of the anoxic reaction chamber, the microbial group is also used as a catalyst to convert nitric acid Salt and nitrite are converted into nitrogen, and at the same time, the effect of reducing phosphorus is also achieved. During the treatment of sewage under aeration and sufficient residence time, COD is also reduced. TSS is filtered out in the filter clarification chamber. Some emission indicators are: COD≤25mg/L, TSS≤10mg/L, TN (total nitrogen)<10mg/L, TP (total phosphorus)<1mg/L, NH3<10mg/L.

4. ASBF invented mutual control and mutual cooperation; interdependence and relative independence; automatic adjustment and self-control, it is not like the membrane process that requires an all-weather computer monitoring system, which not only saves equipment investment, but also saves a lot of operating costs. Mature, with 50 to 60 years of research and development history and examples prove that if the owner needs to achieve water reuse and recovery, its biggest advantage is that it can achieve reclaimed water recovery with the least amount of membrane equipment use.

5. The invention of ASBF does not need to be in the closed and open state frequently, its automatic adjustment and self-control have reached the best operating state, the simplest operation mode, and there is almost little chance to generate sludge balls in any corner and float out of the water, thereby producing fewer possible shocks or reducing the consequences of damaging the activated sludge bed.

6. ASBF invented a unique core technology - the trapezoidal device of the filtration and clarification chamber

The unique trapezoidal design of the filtration and clarification chamber itself provides hydraulic flexibility, which is easy to accommodate the sewage circulation at peak times and handles the flexible flow mode of self-regulation and adaptation to higher flow changes. When the flow rate is high, the sludge bed is raised to filter and clarify the sewage; when the flow rate is low, the sludge bed will automatically drop to filter and clarify the sewage. A thicker sludge bed creates a larger filtration area, increasing filtration and clarification.

7. ASBF invented two unique baffles and other devices

Bubble baffle: The activated sludge bed requires a large amount of oxidized sewage backflow to maintain a high concentration of activated sludge. The bubble baffle prevents the air bubbles in the aerobic reaction chamber from flowing into the filtration and clarification chamber with the sewage, so that the sewage enters the filtration and clarification chamber from the bottom of the aerobic reaction chamber in a balanced manner for rapid adsorption and filtration and clarification.

Baffle diversion groove: It is located above the filtration and clarification chamber. Before the clarified water is discharged, there is a set of baffle diversion groove device, which blocks and automatically collects the scum floating above the filtration and clarification chamber.

Sludge recovery device: it is placed in the anoxic reaction chamber and connected to the sludge recovery port at the bottom of the filtration and clarification chamber; after the sludge in the filtration and clarification chamber settles, with the help of a booster pump, most of the sludge passes through the return valve on the sludge recovery pipe It is introduced into the anoxic reaction chamber, and the remaining sludge is introduced into the external sludge storage room through another valve.

Passage behind the filtration and clarification chamber: the filtration and clarification chamber and the shell of the rectangular parallelepiped container form the flow passage of the narrow sewage mixed liquid in the anoxic reaction chamber and the aerobic reaction chamber.

Eight, ASBF invention also has other characteristics as follows:

1. Compared with the traditional sewage treatment method, the invention of ASBF does not require more pretreatment, only a filter is placed in front of the device. For large sewage treatment plants, it is only in front of the upstream reaction device. Add sand removal system.

2. ASBF invented its own modularization and more flexible design options, so that the owner can design and build according to the development plan, which greatly saves the early investment of funds. And according to the size of the site, the specific situation and needs of the project, a variety of different materials can be selected for design and installation. It is also possible to use the existing reaction tanks to renovate and transform the aging sewage treatment plants that have high operating costs and cannot work effectively and normally, saving investment and time. After completion, it also saves subsequent operating costs.

3. The examples invented by ASBF prove that the sewage treatment plant can operate well in a large range of natural temperature, and the temperature can be in the range of minus 30 degrees to more than 30 degrees, and the operation is good.

4. ASBF invention produces little peculiar smell and bad smell. The aeration of the aerobic reaction chamber is moderate, so that various bacteria and organic matter can be quickly oxidized and swallowed, changing the performance of the sewage and the age of the sludge for as long as 25-25 days. Therefore, the sewage treatment plant can be built far away from the residents Very close.

Summarize:

In summary of the above process flow, the invention of ASBF is a new type of integrated sludge bed biological treatment process. Its invention has solved many difficult problems in the industry. Only relying on this process, the clear water indicators after filtration and clarification are COD (chemical oxygen demand) ≤ 25mg/L, TSS (total suspended particles) ≤ 10mg/L, TN (total nitrogen) < 10mg/L, TP ( Total phosphorus) <1mg/L, NH3 (ammonia nitrogen) <10mg/L. If the minimum number of membrane modules is added later, the reuse of water can be achieved.

The process integrates anoxic, aerobic and upward flow sludge bed filtration and clarification chambers. It has compact structure, easy operation, low investment cost and small footprint.

In the filtration and clarification chamber, the special trapezoidal device has the flexibility of oversized, overloaded, and overloaded. Compared with the existing traditional gravity sedimentation method, the size of the filtration and clarification chamber can be saved by 50%, but it does not reduce the sewage flow, but instead Increase the sewage treatment capacity during the peak period.

Energy saving and emission reduction: Due to the interconnected and mutually restrictive technological process of this invention, it forms activated sludge with high efficiency, high concentration, high adsorption performance and high sedimentation performance, with less equipment utilization and no need for computer monitoring system, low operating cost;

Due to the self-efficiency of the process system, the repeated circulation and reuse of activated sludge, and the lengthening of sludge age, less and highly concentrated sludge waste is produced, which reduces the subsequent sludge treatment costs;

Due to the self-efficiency of the process system, there is no need to add any chemicals (during the treatment process), and it can efficiently degrade COD, TSS, reduce nitrogen and remove phosphorus, and thus separate high-clean water;

It is flexible in operation, convenient for modularization and serial production, and can be increased by stages according to the owner's capital limit;

It is very easy to transform the existing, aging, and abnormal sewage treatment plants; a variety of material options (cement, steel plate, PVC or glass steel); equipment can be purchased domestically, saving foreign exchange.

This device can be widely used in various sewage treatment industries (residential, urban municipal, commercial and industrial), especially in the vast small and medium-sized cities, development zones, vast and scattered towns, tourist attractions, etc.

Practical features of the ASBF invention:

1. Integrate three biological reaction chambers into one

2. Compact and simplified to reduce the scale of civil engineering

3. All biological reactions are integrated, so it has efficient processing results

4. Due to its own model, it can be built in stages, shortening the time from investment to operation

5. It can be prefabricated in the factory, it is easier to install on site, the construction time is short, and labor is saved.

Special trapezoidal shape of the filter clarification chamber:

1. The concentration of activated sludge is high, which prolongs the life of sludge and shortens the time of filtration and sedimentation;

2. Improve the filtration effect, increase the sludge filtration area, and reduce the impact of the water flow at the bottom of the filtration and clarification chamber on the sludge bed;

3. Due to the simple and necessary process layout, the activated sludge evenly enters the filtration and clarification chamber for rapid absorption and precipitation, and quickly introduces the sedimentation sludge evenly into the anoxic reaction chamber, with both in and out;

4. Due to the trapezoidal shape, the trapezoidal interface increases the sewage treatment capacity of each reaction chamber;

5. Due to the trapezoidal shape, the generation of sludge and garbage is reduced and more clean water is added.

Unique process device:

1. Block the bubble plate to prevent the air in the aerobic reaction chamber from entering the filtration and clarification chamber, and improve the optimum value of mud-water separation;

2. The baffle and collection tank on the upper part of the filtration and clarification chamber collect all the sundries that may float on the water surface;

3. The multiple functions of the sludge return pipe: collect sludge, return to the anoxic reaction room, and remove excess sludge to the external sludge storage room.

run:

1. Less equipment investment, energy saving, domestic purchase of corresponding equipment saves foreign exchange;

2. Fewer operators are required to save operating costs;

3. Self-control, self-operation;

4. No complex preprocessing is required;

5. If it cooperates with membrane processor technology, it can effectively achieve water reuse;

6. Improve the high degree of dehydration of sludge, reduce the amount of sludge generated, and reduce follow-up investment.

other

1. No odor, because the system continuously oxidizes the sewage, it can be built in a residential area far away from the residents;

2. It is more suitable for sewage treatment in remote areas, rural areas, towns and large and medium-sized cities;

3. Efficiently degrade COD, TSS, N&P;

4. A variety of material options;

5. Renovate existing old plants and sewage plants with poor operating conditions, saving a lot of redundant construction;

6. Widely used in industrial, municipal, urban, township and agricultural sewage treatment.

Description of drawings

Figure 1: A longitudinal sectional view of the sewage treatment facility at the interface A-A in Figure 2,

Fig. 2: the top view of sludge sewage treatment facility of the present invention,

Fig. 3: B-B in Fig. 2 is the sectional view of the aerobic reaction chamber of the interface,

Figure 4: C-C in Figure 2 is the cross-sectional view of the filtration and clarification chamber at the interface,

Figure 5: D-D in Figure 2 is the cross-sectional view of the anoxic reaction chamber at the interface,

Fig. 6: A three-dimensional perspective view of the facility of the present invention.

Component marks in the figure:

1. Shell, 2. Anoxic reaction chamber, 3. Agitator, 4. Aerobic reaction chamber, 5. Aerator, 6. Filtration clarification chamber, 7. Sludge inlet, 8. Clean water overflow weir, 9. Active Sludge return pipe, 10. Sewage inlet pipe, 11. Mixed liquid level, 12. Baffle diversion groove, 13. Bubble baffle, 14. First interface, 15. Second interface, 16. Third interface, 17. Import sludge valve, 18. Export sludge valve, 19. Sludge export.

Detailed ways

The invention of ASBF is further explained in conjunction with the specific examples shown in the accompanying drawings. This explanation is only used for demonstration of the invention of ASBF, not for limiting the scope of the invention of ASBF.

As shown in Figures 1-6, this is a view of the unique process device invented by ASBF for purifying sewage treatment. The present invention is a rectangular parallelepiped device, and the shell 1 can be made of different building materials according to the scale and size requirements of the treatment plant. For example, it can be made of steel plate, stainless steel plate, PVC, glass fiber reinforced plastic, prefabricated cement board or other non-corrosive materials, and the cuboid facility can be placed on the cement foundation on the ground or underground at the construction site, or buried as a companion according to the actual situation cuboid facility.

Specifically shown in Fig. 1, Fig. 2, Fig. 6, the present invention is a cuboid pool, is combined by three parts: a) an anoxic reaction chamber 2, is provided with sewage inlet pipe 10 on the anoxic reaction chamber 2, waste water Or sewage enters the anoxic reaction chamber 2 through the sewage inlet pipe 10; b) an aerobic reaction chamber 4 communicated with the anoxic reaction chamber 2; c) filtration between the anoxic reaction chamber 2 and the aerobic reaction chamber 4 clarification chamber 6. One or several stirrers 3 are installed in the anoxic reaction chamber 2 . The agitator 3 needs to be placed under the water level 11 of the mixed liquid to agitate the mixed sewage.

Referring again to Fig. 3 and Fig. 4, the first interface 14 of the filtration clarification chamber 6 is positioned between the anoxic reaction chamber 2 and the filtration clarification chamber 6, and the second interface 15 is positioned between the filtration clarification chamber 6 and the aerobic reaction chamber 4. The three interfaces 16 are connected longitudinally and vertically to the first interface 14 and the second interface 15 , and are spaced apart from the shell 1 of the cuboid pool as a narrow channel connecting the anoxic reaction chamber 2 and the aerobic reaction chamber 4 . The three interfaces together with the shell and the bottom surface on the other side constitute the filtration and clarification chamber 6 . Both the first interface 14 and the second interface 15 are inclined inwardly from top to bottom, so that the longitudinal section of the filtration and clarification chamber 6 is trapezoidal. There is one or several sludge inlets 7 below the second interface 15 in the filtration and clarification chamber 6 , which are used to introduce the sludge in the aerobic reaction chamber 4 into the filtration and clarification chamber 6 on average. With reference to Fig. 5 again, be positioned at filter clarification room 6 first interface 14 bottoms and be provided with a sludge outlet 19, sludge outlet 19 connects an activated sludge return pipe 9 that passes into anoxic reaction chamber 2, connects on the activated sludge return pipe 9 There is a pump (not shown in the figure) for pumping out the sludge. The activated sludge return pipe 9 is connected in parallel with an import sludge valve 17 and an export sludge valve 18; the activated sludge return pipe 9 is controlled by the import sludge valve 17, and is used to circulate the input from the filter clarification chamber 6 into the anoxic reaction The return sludge of chamber 2 is controlled by exporting sludge valve 18, and at the same time, excess sludge is exported to an external sludge storage room (not shown in the figure). A group of baffle guide grooves 12 are arranged on the upper part of the filtration clarification chamber 6 to intercept and collect all floating suspended impurities. The clear water overflow weir 8 is separated in the middle of the baffle diversion groove 12, and is used for discharging the clean clear water after filtration and clarification to the outside. Outside the sludge inlet 7 at the lower part of the second interface 15 of the filter clarification chamber 6 , at the bottom of the aerobic reaction chamber 4 , a bubble baffle 13 is fixed to prevent air bubbles from entering the filter clarification chamber 6 from the aerobic reaction chamber 4 .

As shown in Figure 1 and Figure 6, the filtration and clarification chamber 6 is a trapezoidal section. The first interface 14 and the second interface 15 on both sides of the trapezoid are connected to the bottom of the cuboid, and the angle range between the first interface 14 and the second interface 15 is between 50 degrees and 80 degrees.

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, between the third interface 16 connected to the two interfaces of the first interface 14 and the second interface 15 and the shell 1, a diversion space is provided to dredge the air from hypoxia. The reaction chamber 2 flows into the mixed sewage of the aerobic reaction chamber 4. As shown in Fig. 1, a clean water overflow weir 8 is provided on the upper part of the filter clarification chamber 6 as the treated clean water outlet. As shown in Fig. 1 and Fig. 2, above the filtration and clarification chamber 6, a baffle diversion groove 12 is provided for collecting scum and sundries floating on the clear water.

The anoxic reaction chamber 2 of the sewage treatment of the present invention accepts the agitation and mixing of sewage inflow and reflux concentrated sludge and outputs the sewage to the aerobic reaction chamber 4. In the aerobic reaction chamber 4, an aerator 5 is provided to help the oxidation reaction, Carbon removal and nitrification reactions. In the aerobic reaction chamber 4, there are many sources of gas. For example, ambient air can be used to aerate with a blower pump. The aerator 5 can be provided by aeration devices of different sizes, for example, according to the size of the sewage treatment device, one or several aerators of different sizes are selected to make the system reach the ratio of DO (dissolved oxygen). If necessary, energy-saving devices and how to match them to achieve aeration should also be considered, and the problem of sewage flow during peak periods should also be considered. After the aerobic reaction chamber 4 aerates the mixed liquid, oxidizes and decomposes it, the high-efficiency sludge is introduced into the filtration and clarification chamber 6 through the sludge inlet 7 .

The three walls formed by the three interfaces of the device of the present invention to form the filtration and clarification chamber 6 can be prefabricated in advance and placed in a cuboid, or can be a device integrated with the cuboid made on site.

The technical method of the ASBF sewage treatment facility of the present invention can be widely used in industrial sewage treatment, urban municipal sewage treatment, agricultural sewage treatment and various sewage mixed liquids will be high-concentration COD sewage treatment industries; or remove various organic ammonia, nitrogen , phosphorus and other pollutants of different levels of sewage treatment industry. Moreover, it can meet the relevant basic requirements of the Chinese national standard (GB18918-2002); this process method can be used for treating as little as 5 cubic meters of sewage per day to as large as there is no online limit.

The ASBF sewage treatment process method is also used to transform and upgrade existing sewage treatment facilities. For example, in order to improve sewage treatment technology and save cost and operating costs, a new and more efficient water effluent process is completely modified and designed based on the existing treatment process.

Summarizing the above description, the ASBF process can be used in any size, with any operable brand of pumps, mixers, lift pumps or other equipment and materials. The technical innovations reflected therein are all within the scope of the claims. The core technology invented by ASBF is to achieve cleaner water and reduce sludge discharge. Nitrogen and phosphorus removal is the nitrification and denitrification process completed by the joint cooperation of anoxic reaction chamber 2 and aerobic reaction chamber 4. Efficient and stable activated sludge life can reach 35 days. The invention of ASBF will be an indispensable driving force for sustainable development, energy saving and emission reduction. ASBF technology is a new model of technology, which can be used in various industries of recycling and water reuse after sewage treatment. It is more applicable to China's rapid economic development today and tomorrow. The invention of ASBF will provide an infinite space for China's future resource saving and bring new life to water.

Claims (8)

1. A sewage treatment facility, which is a cuboid pool composed of three parts: an anoxic reaction chamber, an aerobic reaction chamber connected with the anoxic reaction chamber and an anoxic reaction chamber and an aerobic reaction chamber Filtration clarification chamber between; specifically includes: a) an anoxic reaction chamber containing sewage inlet pipes and agitators; b) An aerobic reaction chamber connected to the anoxic reaction chamber, an aeration device is installed in the aerobic reaction chamber, and a bubble baffle to prevent air bubbles from entering the filtration and clarification chamber; c) a filter clarification chamber connected to the aerobic reaction chamber through the bottom sludge inlet; the first interface of the filter clarification chamber is located between the anoxic reaction chamber and the filter clarification chamber, and the second interface is located between the filter clarification chamber and the aerobic reaction chamber Between, the third interface is vertically connected with the first and second interfaces vertically, and is separated from the shell of the cuboid pool; the three interfaces together with the shell and the bottom surface on the other side constitute a filtration clarification chamber; d) An activated sludge return device for reclaiming activated sludge to the anoxic reaction chamber or removing sludge to an external storage room; the described activated sludge return device is: a sludge outlet is provided at the lower part of the first interface of the filter clarification chamber , the sludge outlet is connected to an activated sludge return pipe leading to the anoxic reaction chamber, and the activated sludge return pipe is controlled by a valve to recycle the activated sludge to the anoxic reaction chamber or remove the sludge to the external storage room; e) a baffled diversion channel to block and collect scum from the filter clarification chamber for trapping floating debris from the filter clarification chamber to an external waste collection basin; f) A clean water overflow weir installed in the filter clarification chamber to lead out clean water. 2. The sewage treatment facility according to claim 1, wherein in c), both the first interface and the second interface are inclined inwardly from top to bottom, so that the longitudinal section of the filtration and clarification chamber is trapezoidal. 3. The sewage treatment facility according to claim 1, the distance separated between the third interface of the filter clarification chamber in c) and the shell of the cuboid pool, as the narrow passage connecting the anoxic reaction chamber and the aerobic reaction chamber. 4. The sewage treatment facility according to claim 1, the baffle diversion tank in e) is located at the upper part of the filter clarification chamber. 5. The sewage treatment facility according to claim 1 or 4, in f), the clear water overflow weir is separated in the middle of the baffle diversion groove. 6. The sewage treatment facility according to claim 1, wherein the air bubble baffle in b) is fixedly installed outside the sludge inlet at the bottom of the second interface of the filtration clarification chamber, at the bottom of the aerobic reaction chamber. 7. A treatment method that uses the sewage treatment facility of claim 1 to utilize biochemical technology for sewage treatment, and its treatment process is to filter and clarify sewage through anoxic reaction chamber, aerobic reaction chamber, filter clarification chamber and sludge filter bed The technological process; after the sewage enters the anoxic reaction chamber, it is mixed with a large amount of activated sludge returned from the filtration and clarification chamber, and then flows into the aerobic reaction chamber through the narrow channel connecting the anoxic reaction chamber and the aerobic reaction chamber; in the aerobic reaction Indoors, a large number of bacteria, fungi and microorganisms (animals) quickly swallow a large amount of organic matter under the action of aeration, oxygenation and decomposition, and quickly form suspended objects through aeration metabolism, that is, the sticky shape formed after bacteria secretion The polysaccharide substance-activated sludge with a huge surface area, that is, suspended floc; the suspended floc is introduced into the filtration and clarification chamber through one or several sludge inlets below the aerobic reaction chamber; in the filtration and clarification chamber, the clarification and separation method, It is a sludge filter bed sewage treatment process formed by strengthening activated sludge upward. Due to the unique trapezoidal vertically widening structure of the filter clarification chamber, the sludge is introduced from the bottom of the filter clarification chamber and the vertically decreasing water flow impacts the sludge. The strength of the filter bed, while the high-concentration sludge filter bed quickly absorbs and filters the sludge that flows upwards, which increases the thickness, thereby accelerating the filtration, sedimentation and clarification, forming the best, ideal, Longitudinal downward filtration; and the unique trapezoidal longitudinal section area increases the formation of mud-water separation space, so as to achieve clearer water flowing out through the clear water overflow weir above the filtration and clarification chamber, and most of the concentration after adsorption and precipitation The sludge returns to the anoxic reaction chamber through the activated sludge return pipe and mixes with the sewage entering the anoxic reaction chamber, and starts a new round of the same cycle treatment process as the above process; at the same time, the excess sludge collected by the activated sludge return pipe Convey to external sludge storage room. 8. The treatment method according to claim 7, characterized in that: the scum and sundries floating on the clear water are collected by the baffle diversion groove provided above the filtration and clarification chamber.

Images