CN106966506A - A kind of SBR method of wastewater treatment and device that carbon is released including online eddy flow - Google Patents

Abstract

The present invention relates to a kind of SBR waste water treatment method that comprises on-line cyclone release carbon, and described method comprises the water inflow stage, aeration stage, sedimentation stage, decanting stage and idle stage carried out in SBR biochemical tank, wherein in aeration In the first stage, the internal return mixed liquid in the SBR biochemical pool is subjected to online cyclone carbon release through the cyclone carbon release device, and the mixed liquid that has undergone online cyclone carbon release is returned to the SBR biochemical pool again. The present invention also relates to a device for implementing the above-mentioned SBR wastewater treatment method including online swirl carbon release. The invention has the beneficial effects of improving biochemical performance and sludge reduction; it has the innovative idea of "process emission reduction" and reduces the cost of sludge treatment and disposal; and the cyclone carbon release device has low energy consumption, no secondary pollution, and a simple structure , Easy to replace and does not affect the stable operation of the system.

Description

A SBR wastewater treatment method and device including online swirling carbon release

technical field

The invention belongs to the field of activated sludge process wastewater treatment process transformation, and relates to an SBR wastewater treatment method and device including online swirl carbon release, specifically, a swirl carbon release device is installed next to the traditional SBR biochemical pool, and the aeration At the same time, the online cyclone carbon release process is introduced to enhance the performance of anoxic/aerobic biological nitrogen removal and realize the method of sludge reduction, as well as the device to realize the method.

Background technique

The existing relatively mature purification and treatment technologies for industrial and domestic wastewater include physical, chemical and biological treatment methods. Because there are a large number of microorganisms in nature, they have the great function of oxidatively decomposing organic matter and converting it into inorganic matter, and can also make some toxic substances Organic substances such as phenols, aldehydes, fats, etc. are harmless, so biological treatment is the main process of sewage treatment. SBR (Sequencing Batch Activated Sludge Reactor Technology) is different from other processes. It uses time division instead of space division. The process includes 5 stages, namely water inflow, aeration, sedimentation, decanting Water, idle phase. The process has a small number of structures, low cost, no need for secondary sinking, easy operation and maintenance management, and avoids the shortcomings of traditional anaerobic reactors such as low treatment efficiency and large land occupation, and is widely recognized around the world.

There are a lot of toxic and refractory pollutants in the existing industrial sewage, which cannot be degraded or detached from the surface of activated sludge flocs for a long time, resulting in blocked mass transfer, resulting in the inability of nitrifying or denitrifying bacteria to obtain nutrient supply in time, resulting in poor bacterial activity . In addition, with the improvement of people's living standards and the acceleration of urbanization, the concentration of nutrient elements N and P in domestic wastewater has increased, resulting in a decrease in the relative concentration of C in the influent, affecting the effect of denitrification and denitrification. In addition to problems such as hindered sludge mass transfer, low sludge activity, and nitrogen and phosphorus removal efficiency, problems such as large excess sludge output, high organic toxicity, and difficulty in recycling are also major problems faced by existing sewage treatment. In view of the above problems, Chinese invention patent application 201210067683.3 discloses a method of filling biological carrier filler in the main process of sewage treatment, which is rich in trace elements for microbial growth. The unique form of biological carrier can form a DO variable environment, and the sludge residence time is long. Realize The purpose of sludge reduction; Chinese invention patent application 201210172789.X discloses a kind of anaerobic biochemical reaction such as denitrification in the anaerobic tank, which is filled with solid nutrient salts, to achieve sludge reduction; Chinese invention patent application 200910072268.5 discloses a Part of the sludge is ultrasonically crushed and ozone treated, and then enters the primary sedimentation tank together with urban sewage for hydrolysis and acidification treatment to improve sludge activity and strengthen the effect of nitrogen and phosphorus removal; Chinese invention patent application 201410753368.5 discloses an enhanced synchronous denitrification Phosphorus removal sewage treatment method and device; Chinese invention patent application 201310392290.4 discloses a sewage denitrification treatment process, by adding organic matter to sewage to supplement the lack of carbon sources for nitrogen and phosphorus removal. The above patents mainly achieve sludge reduction and enhanced nitrogen and phosphorus removal by adding some additional substances or increasing energy consumption. However, these methods have problems such as secondary pollution, unstable operation, and high operating costs. The sludge yield and instability are mainly caused by the large amount of organic matter in the sludge flocs. Therefore, it is considered to mechanically crush the sludge flocs during the biochemical treatment process to release organic matter such as polysaccharides and proteins in the flocs, and use them as organic carbon. The source is reused in the reaction tank to achieve process emission reduction; the active free bacteria can form highly active sludge flocs again in the biological treatment process to strengthen the biochemical efficiency of the system, which is in line with the reduction of sludge source and the realization of sludge resources utilization requirements.

In the existing SBR sewage treatment project, in order to strengthen the shear effect around the sludge flocs, maintain the activated sludge with high activity and the structural characteristics of small flocs, and remove the refractory colloidal substances coated on the surface of the flocs to improve the organic The mass transfer of pollutants to the floc active area is often enhanced by strengthening the aeration intensity to enhance the mixing and shearing effect in the tank. This will inevitably result in waste of energy consumption for air aeration. For this reason, a cyclone carbon release device is added in the aeration stage of the traditional SBR process, and the shear stress field in the wastewater swirl field is used to break most of the sludge flocs and perform shearing treatment around the flocs to remove bacteria and flocs. The colloidal substances adsorbed on the body surface expose the enzyme active sites and increase the sludge activity. Furthermore, under the action of swirling shear stress and centrifugal force, organic carbon sources such as polysaccharides and proteins in floc cells or pores are detached into the water body to supplement the energy required by heterotrophic bacteria to degrade pollutants (ammonia nitrogen, etc.) . The consumption of organic matter in the biochemical system avoids its deposition and conversion into excess sludge and discharge, and prevents environmental pollution caused by large-scale stacking of wet mud. Next to the traditional SBR sewage treatment system, it is only necessary to set up a cyclone carbon release device, and there is no need to add chemicals during operation. The energy consumption is mainly to pressurize the submersible sewage pump before the cyclone carbon release device. It has low operating costs and no by-products. In addition, it reduces the production of excess sludge in the process of biochemical treatment, reduces the cost of sludge treatment and transportation, and is in line with the environmental protection strategy of "process emission reduction" advocated by the state.

Contents of the invention

The invention provides an SBR wastewater treatment method including on-line swirl carbon release, in which a swirl carbon release device pipeline is added to the traditional SBR sewage treatment system to improve the biological activity of activated sludge, strengthen the efficiency of sewage treatment process and realize the sludge decrease. The device used for implementing the above method has simple structure, low energy consumption and can reduce environmental pollution caused by large area accumulation of wet mud.

In order to solve the problems in the prior art, the present invention provides the following technical solutions:

In a first aspect, the present invention provides a method for treating SBR wastewater comprising online cyclone release of carbon, said method comprising the water intake stage, aeration stage, settling stage, decanting stage and idle stage carried out in the SBR biochemical tank stage, wherein in the aeration stage, the internal return mixed liquid in the SBR biochemical pool is subjected to online cyclone carbon release through the cyclone carbon release device, and the mixed liquid that has undergone online cyclone carbon release is returned to the SBR biochemical pool again.

In one embodiment of the first aspect, the online swirling carbon release is configured to (1) use an external energy field to break up the sludge flocs into smaller floc structures, clean up impurities on the cell surface and dredge the Nutrient transfer channel inside the floc structure, strengthen the interfacial mass transfer performance of the floc structure, so that the floc structure maintains higher activity and biochemical properties than the sludge floc; or (2) in the swirl shear Under the action of the field, the completely disintegrated sludge flocs will release organic matter into the water body, supplement the electron donors required by microorganisms for denitrification reaction, and strengthen the denitrification performance. The organic matter includes Extracellular Polymeric Substances (EPS ), intracellular polysaccharides and proteins, etc.; or (3) the organic matter released from the sludge flocs into the water body is degraded by microorganisms, which hinders the increase of the total biomass of the system and the generation of metabolic waste, and finally reduces the remaining sludge production; or ( 4) Increase the fluid turbulence in the reaction tank, promote the transfer rate between bacterial reaction products, increase the contact probability between microorganisms and wastewater pollutants, and strengthen the biochemical efficiency; or any combination of (1)-(4).

In another embodiment of the first aspect, the cyclone carbon release device is introduced in the aeration stage, and its synchronous operation time is set according to the water quality of the sewage, wherein the shearing action and centrifugal action of the cyclone carbon release device release the package The clogging impurities covering the surface and pores of the flocs expose enzyme active sites and improve the activity of the floc structure, and the flow rate at the inlet of the cyclone carbon release device is 1-10m/s, preferably 1-7m/s.

In another embodiment of the first aspect, the formation of the strong shear effect inside the cyclone carbon release device comes from the velocity gradient and pressure gradient formed by the liquid's own flow in the swirl field, and the cyclone carbon release device Including the feed inlet, cylindrical section, cone section, overflow pipe and underflow pipe, the pressure drop between the feed inlet and the underflow pipe of the cyclone carbon releaser is 0.02MPa-0.5MPa, and the mass flow rate of the overflow outlet is 1%-10% of the flow rate at the feed port, so that the flow field shear rate G>1000s ^-1 .

In another embodiment of the first aspect, during the online cyclone carbon release process, some bacteria die under the action of cyclone shearing, and the released organic matter is degraded by heterotrophic bacteria, reducing the output of excess sludge.

In another embodiment of the first aspect, a cyclone carbon release device is introduced in the aeration stage of the SBR sewage treatment process to promote the rapid flow of fluid in the tank, and the sludge flocs shear each other to release the impurities coated on the surface of the flocs , promote interfacial mass transfer; at the same time increase the contact probability between bacteria and wastewater pollutants, increase the degradation rate of pollutants, and enhance biochemical efficiency.

In a second aspect, the present invention provides a device for implementing the method as claimed in claim 1, the device may include a grit chamber connected by pipelines for sewage pretreatment, a denitrification and dephosphorization SBR biochemical pool, cyclone carbon release device for online cyclone carbon release.

In an embodiment of the second aspect, the cyclone carbon release device may include a feed inlet, a cylindrical section, a cone section, an overflow pipe and an underflow pipe, and the flow range of the feed inlet of the cyclone carbon release device is 1-100m ³ /h, determine the nominal diameter of the cyclone carbon releaser single tube according to the actual mixed liquid return flow, or solve the large flow mixed liquid treatment condition by connecting multiple cyclone carbon releaser single tubes in parallel.

In another embodiment of the second aspect, the cyclone carbon release device can adopt single inlet or multiple inlets, and the cone angle of the cone section is 4°-20°.

In another embodiment of the second aspect, the feed inlet of the cyclone carbon release device may adopt a tangential inlet, and the shape of the inlet may be circular or square.

In another embodiment of the second aspect, the cyclone carbon release device can be connected in series to increase the residence time of the sludge flocs in the swirl field, so as to adapt to the sludge flocs required under different working conditions. Group breakage rate.

Compared with the prior art, the beneficial effect of the present invention is that the activated sludge is crushed by the cyclone shearing and centrifugal action of the cyclone carbon release device, the organic carbon sources such as polysaccharides and proteins in the sludge are released into the water body, and the microorganisms are replenished. The carbon source required for denitrification reaction degrades pollutants, improving biochemical efficiency and sludge reduction. Compared with other sludge cracking technologies, the treatment object of this technology is not to crack the excess sludge that has already been produced, but to prevent the large increase of biomass and the production of metabolites during the biochemical treatment process, which has "process emission reduction" Innovative ideas to reduce sludge treatment and disposal costs. On the other hand, surviving microorganisms still maintain high activity under the action of shear field, which can be used for efficient sewage treatment. Furthermore, the cyclone carbon release device has the characteristics of low energy consumption, no secondary pollution, simple structure, easy replacement and does not affect the stable operation of the system.

Description of drawings:

According to the following detailed description carried out in conjunction with the accompanying drawings, the objects and features of the present invention will become more apparent, in the accompanying drawings:

Fig. 1 is a process flow diagram of an activated sludge cyclone release carbon online strengthening SBR wastewater treatment according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a half-section structure of a cyclone carbon release device according to an embodiment of the present invention; and

Fig. 3 is a front structural schematic diagram of a cyclone carbon release device according to an embodiment of the present invention.

detailed description

After extensive and in-depth research, the inventors of the present application found that with the improvement of people's living standards, the content of elements such as nitrogen and phosphorus in wastewater increases, and the carbon source is insufficient, which leads to denitrification bacteria denitrification in the process of biological purification of wastewater. The effect of nitrogen is poor, and a large amount of excess sludge is produced, which seriously pollutes the environment. Although the biochemical efficiency of microbial nitrogen and phosphorus removal can be improved and the yield of excess sludge can be reduced by adding carbon sources such as methanol, glucose and sodium carbonate, but it increases a lot of energy consumption and resource costs. The present invention proposes to release EPS and intracellular carbohydrates, proteins and other organic matter through the special flow field in the cyclone carbon release device to break down the sludge flocs to supplement the carbon source required by microorganisms to degrade pollutants. This method not only improves the SBR biochemical pool It also reduces the cost of excess sludge treatment and disposal, and realizes the resource utilization and stable utilization of sludge. Based on the above findings, the present invention has been accomplished.

In a first aspect of the present invention, there is provided a kind of improved process that introduces the swirl carbon release process to strengthen the system biochemical performance and sludge reduction in the short-range nitrification and denitrification process control of the SBR biochemical treatment system, which includes the following processes:

In the aeration stage of SBR sewage treatment currently used in sewage treatment plants, a cyclone carbon release device is introduced, and the shear force field, centrifugal force field and other external energy fields are used to break up large sludge flocs into small floc structures, and clean up long-term coverage Refractory pollutants and impurities on the cell surface can dredge the internal nutrient transfer channel of the floc, strengthen the mass transfer performance of the floc interface, and keep the small floc structure with high activity and high biochemical performance;

In the strong shear flow field, some sludge flocs are completely broken and release organic matter such as extracellular polymeric substances (EPS), intracellular polysaccharides and proteins into the water body, which is used to supplement the carbon source required for microbial denitrification in the SBR biochemical tank , to strengthen the nitrogen and phosphorus removal efficiency of the system; at the same time, the degradation of organic matter in the system hinders the increase of system biomass and the production of metabolites, prevents them from being deposited and discharged as sludge, and finally reduces the remaining sludge output of the system;

In addition, the mixed liquid in the reaction tank increases the fluid flow rate in the reaction tank (especially in the dead zone) after being acted on by the cyclone carbon release device, promotes the transfer rate between microbial reaction products, increases the contact probability between microorganisms and wastewater pollutants, and strengthens the biochemical process. efficacy.

Preferably, the SBR sewage treatment process is a sequential batch activated sludge process, including five stages of water intake, aeration, sedimentation, decanting, and idleness. The present invention introduces a cyclone carbon release device in the aeration stage, which synchronizes The running time is set according to the water quality of the sewage; the inlet flow rate of the cyclone carbon releaser is controlled at 1-10m/s, such as preferably 1-7m/s, and the flow at the overflow port is adjusted to be 1%-15% of the inlet flow in volume , such as preferably 1%-10%, the inlet and outlet pressure drop is greater than 0.02MPa, for example, the inlet and outlet pressure drop is 0.02MPa-0.5MPa, preferably 0.05-0.1MPa, so that the flow field shear rate G>1000s ^-1 , such as 2000s ^-1 , 4000s ^-1 , the internal shear force and centrifugal force can be used to clean the impurities coated on the surface of the flocs and blocking the pores to expose the protease active sites and improve the activity of the small floc structure.

Preferably, EPS, intracellular polysaccharides, protein and other organic matter released after a large amount of sludge flocs are cracked by the cyclone carbon release device are used to supplement the carbon source required for microbial denitrification reaction, which solves the problem caused by the external carbon source. Problems such as high cost and secondary pollution.

Preferably, the present invention decomposes the activated sludge during the biochemical treatment process. Compared with decomposing the excess sludge that has already been produced, it not only reduces the sludge transportation cost, but also reduces the excess sludge output. It has a process Innovative ideas for reducing emissions.

Preferably, the mixed liquid returns to the SBR biochemical tank after passing through the cyclone carbon release device to enhance the fluid turbulence, resulting in the mutual shearing between the sludge flocs, and the strengthening of microbial reaction products and dissolved oxygen (Dissolved Oxygen, DO) Mass transfer improves the biochemical activity of surviving microorganisms and can save about 20% of aeration energy consumption.

The second aspect of the present invention provides the main devices needed for the SBR sewage treatment improvement process of swirl-enhanced activated sludge denitrification performance and sludge reduction: grit chamber for sewage pretreatment, for denitrification and dephosphorization Advanced SBR biochemical pool, cyclone carbon release device for optimizing treatment process.

Preferably, the flow rate range of the cyclone carbon releaser for optimizing the treatment process is 1-100m ³ /h, and the nominal diameter of the single tube of the cyclone carbon releaser is selected according to the actual mixed liquid flow rate.

Preferably, for large-flow sludge cracking, multiple small-diameter cyclone carbon releasers are used to work in parallel to ensure the sludge floc breaking efficiency.

Preferably, the cyclone carbon release device can adopt a single inlet or multiple inlets, and the cone angle of the cone section is 4°-20°, so as to achieve a high decomposition rate of sludge.

Preferably, the inlet of the cyclone carbon releaser adopts a tangent inlet, and the shape of the inlet adopts a circle or a square.

Preferably, the cyclone carbon release device adopts a series connection method to increase the residence time of the sludge flocs in the cyclone field, so as to adapt to the required sludge crushing rate under different working conditions.

Preferably, the cyclone carbon release device can be installed vertically, horizontally and obliquely.

The method of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is an improved process flow chart of the SBR sewage treatment system according to an embodiment of the present invention. As shown in Figure 1, domestic or industrial wastewater enters the grit chamber 1 for filtration and separation, and the pretreated wastewater enters the SBR biochemical pool 2, where the organic pollutants in the wastewater are degraded by microbial nitrification and denitrification reactions in the SBR biochemical pool 2 , so as to achieve the purpose of purifying sewage. The cyclone carbon releaser bypass is mainly used to enhance the wastewater treatment process. The main steps are as follows: In the aeration stage, the mixed liquid of the SBR biochemical tank is pumped into the cyclone carbon release device 4, and the velocity gradient field, pressure gradient field and centrifugal field formed by the liquid's own flow in the cyclone field break up the sludge flocs Form a small floc structure, the EPS polysaccharides and proteins in the sludge flocs are released into the water body, and the broken mixed solution returns to the SBR biochemical pool 2 to supplement the organic carbon source required for denitrification in the SBR biochemical pool 2 to strengthen denitrification. Nitrogen and sludge reduction.

Fig. 2 is a schematic diagram of a half-section structure of a cyclone carbon release device according to an embodiment of the present invention. Fig. 3 is a front structural schematic diagram of a cyclone carbon release device according to an embodiment of the present invention. The cyclone carbon release device includes a feed inlet 21, a cylindrical section 22, a cone section 23, an overflow pipe 24 and an underflow pipe 25. The inlet adopts a tangential square inlet with a taper of 14°.

Example

The present invention is further described below in conjunction with specific examples. However, it should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. The test methods for which specific conditions are not indicated in the following examples are generally in accordance with conventional conditions, or in accordance with the conditions suggested by the manufacturer.

1. Implementation process

This embodiment is applied to an SBR sewage treatment system of a domestic sewage treatment plant, and the influent water quality is shown in Table 1. The schematic diagram of the process flow is shown in Figure 1. The wastewater first enters the grit chamber 1 to remove scum, which reduces the processing burden of the subsequent process. The aeration device is turned on during the aeration stage, and the pump switch on the 4 branches of the cyclone carbon releaser is automatically turned on, and the sludge The flocs are pumped into the cyclone carbon release device 4, and the velocity gradient and pressure gradient field formed by the fluid itself shear and break the sludge flocs, and the sludge flocs are broken into smaller floc structures, which promotes the process of sludge flocs EPS, polysaccharides, proteins, etc. are released, and the crushed mixed solution is returned to the SBR biochemical pool 2 to replenish the carbon source required for microbial denitrification to strengthen microbial denitrification and sludge reduction. Moreover, after the introduction of the cyclone carbon release device, the flow and mixing degree of sewage are increased, the interface mass transfer and contact area between activated sludge and sewage are increased, and the short-range nitrification and denitrification time of microorganisms is shortened. The aeration time is 2 hours. After aeration, after 3 hours of sedimentation, decant the water and discharge the remaining sludge. This is a cycle. The flow rate of the cyclone carbon release device is 5m/s, and its structural schematic diagram is shown in Fig. 2 and Fig. 3 .

Table 1 Influent water quality of a domestic sewage plant

2. Running results

The sludge floc concentration of the sewage treatment plant is 3000-4000mg/L, the SV ₃₀ is about 45%, and the operating temperature is normal temperature. Influent COD is 328mg/L, ammonia nitrogen is about 38mg/L. The activated sludge in the SBR biochemical tank needs an average interval of 1.5 hours to pass through the cyclone carbon release device, and 35%-80% of the sludge flocs are broken into small floc structures, releasing organic matter such as polysaccharides and proteins in the flocs. It can be utilized in water bodies, and the biochemical efficiency and sludge reduction of the sewage treatment system can be improved by using the present invention. During operation, effluent COD≤50mg/L, NH ₄ ⁺ -N≤5mg/L, NO ₃ -N≤15mg/L, TP<2mg/L, SS<20mg/L, can achieve 40% sludge reduction about.

In terms of energy consumption, compared with the traditional process, the increased energy consumption of the present invention is mainly used to support the energy consumption of the pump of the cyclone carbon release device, and the pressure loss of the cyclone carbon release device (that is, the cyclone carbon release device) The loss between the inlet of the carbonizer and the underflow outlet) is below 0.15Mpa, which greatly reduces the cost of energy consumption compared with other sludge carbon release technologies.

In terms of operating range and stability, the installation and operation of the cyclone carbon release device is simple, and it is effective for sludge flocs of different particle sizes, and from the experimental results, the settlement of the mixed solution after the cyclone carbon release device is slightly The lifting effect does not affect the stable operation of the system.

3. Technical effect

This technology is modified on the traditional SBR sewage treatment process, with simple structure, simple operation, low energy consumption, no secondary pollution in the process of biochemical treatment, and does not affect the stable operation of the system. Sludge reduction, thereby reducing sludge disposal costs by about 40%. Moreover, the reduction of sludge production prevents the site pressure and environmental pollution caused by the large-scale accumulation of wet sludge in sewage treatment plants, and brings economic and environmental benefits to enterprises.

In summary, the above are only preferred embodiments of the invention, and are not intended to limit the implementation scope of the invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention shall be within the technical scope of the present invention.

Claims (10)

1. a kind of SBR method of wastewater treatment that carbon is released including online eddy flow, methods described is included in entering of being carried out in SBR biochemistry pools Water stage, aeration phase, precipitate phase, water stage and idle stage are strained, wherein releasing carbon device to SBR by eddy flow in aeration phase Interior backflow mixed liquor in biochemistry pool carries out online eddy flow and releases carbon, and wherein will release the mixed liquor of carbon again by online eddy flow It is back to SBR biochemistry pools.

2. the method as described in claim 1, it is characterised in that the online eddy flow, which releases carbon and is configured to (1), utilizes external energy Sludge floc sedimentation is broken in field dissipates into smaller flocculation structure, clears up cell surface impurity and simultaneously dredges nutrients inside the flocculation structure Matter transmission channels, strengthen the interfacial mass transfer performance of the flocculation structure, the flocculation structure is kept higher than sludge floc sedimentation Activity and biochemical property；Or (2) are under rotational-flow shearing field action, the sludge floc sedimentation cracked completely is set to discharge organic matter to water body In, supplement microorganism carries out electron donor needed for anti-nitration reaction, and strengthened denitrification efficiency, the organic matter includes extracellular polymeric EPS, intracellular polyse and protein etc.；Or (3) make sludge flco discharge the organic matter into water body to be degraded by microorganisms, system is hindered The increase and the generation of metabolic waste of the biological total amount of system, finally cut down excess sludge production；Or (4) improve fluid rapids in reaction tank Dynamic degree, promotes the contact probability of transfer rate between bacterial reaction product, increase microorganism and Wastewater Pollutant, the biochemical effect of reinforcing Energy；Or any combination in (1)-(4).

3. the method as described in claim 1, it is characterised in that the eddy flow is released carbon device and introduced in aeration phase, it is synchronously transported The row time sets according to sewage quality, wherein eddy flow release carbon device shear action and centrifugal action release be coated on flco surface and The blocking impurity of hole, exposure enzyme active sites, improves the activity of flocculation structure, and it is 1- that wherein eddy flow, which releases carbon device inlet flow rate, 10m/s, preferably 1-7m/s.

4. the method as described in claim 1, it is characterised in that the formation that the eddy flow releases Strong shear effect inside carbon device comes from The velocity gradient and barometric gradient formed is flowed in liquid in eddy flow field itself, the eddy flow, which releases carbon device, includes charging aperture, cylinder Section, cone section, overflow pipe and underflow pipe, the pressure drop that the eddy flow releases between carbon device charging aperture and underflow pipe is 0.02MPa- 0.5MPa, overfall mass flow is the 1%-10% of charging aperture flow, makes flow field shearing G>1000s^-1。

5. the method as described in claim 1, it is characterised in that during online eddy flow releases carbon, part bacterium is cut in eddy flow The lower death of the effect of cutting, the organic matter discharged is degraded by heterotroph, reduces excess sludge production.

6. a kind of device for being used to implement the method as described in claim 1, described device was included by being used for that pipeline is connected The setting pot of sewage disinfection treatment, the SBR biochemistry pools for denitrogenation dephosphorizing, the eddy flow for releasing for carrying out online eddy flow carbon release carbon device.

7. device as claimed in claim 6, it is characterised in that the eddy flow release carbon device including charging aperture, cylindrical section, cone section, Overflow pipe and underflow pipe, the range of flow that the eddy flow releases carbon device charging aperture are 1-100m³/ h, according to actual mixed-liquor return amount Determine that eddy flow releases the nominal diameter of carbon device single tube, or big flow mixing is solved by way of many eddy flows in parallel release carbon device single tube Liquid handles operating mode.

8. device as claimed in claim 7, it is characterised in that the eddy flow releases carbon device using single import or many imports, bores section Cone angle is 4 ° -20 °.

9. device as claimed in claim 7, it is characterised in that the eddy flow releases carbon device charging aperture and uses tangential inlet, import Shape is using circular or square.

10. device as claimed in claim 6, it is characterised in that the eddy flow releases carbon device and uses series system to increase sludge Residence time of the flco in eddy flow field, to adapt to sludge floc sedimentation percentage of damage required under different operating modes.