Synchronous nitrosation-Anammox device for low-temperature low-ammonia-nitrogen sewage based on magnetic induction heat effect and application thereof

Abstract

The invention relates to a synchronous nitrosation-Anammox device for low-temperature low-ammonia-nitrogen sewage based on a magnetic induction heat effect, which comprises a sewage treatment container, a composite filler in the sewage treatment container and a magnetic field generation device outside the sewage treatment container. A metal conductor is arranged in the composite filler, a protective layer is arranged on the middle layer, a porous adsorption carrier layer is arranged on the outer layer, and anaerobic ammonia oxidizing bacteria and nitrite bacteria grow in the porous adsorption carrier layer and on the surface of the porous adsorption carrier layer. The device adopts a one-stage Canon process, local high temperature is generated through an external alternating magnetic field and the magnetic induction heat effect of the metal conductor in the composite filler, meanwhile, the outer adsorption carrier selectively adsorbs ammonia nitrogen to create a local high-nitrogen-carbon-ratio environment, anaerobic ammonia oxidizing bacteria and nitrite bacteria are efficiently screened, and competitive advantages of the anaerobic ammonia oxidizing bacteria and the nitrite bacteria are kept. The biological activity is efficiently improved with low consumption, the denitrification capacity of the nitrosation-Anammox process on low-temperature and low-ammonia-nitrogen urban sewage is remarkably improved, and the capital construction and operation cost for sewage treatment is greatly reduced.

Description

technical field

[0001] The invention belongs to the technical field of sewage biological denitrification treatment, and in particular relates to a biofilm synchronous nitrosation-Anammox urban low-temperature, low-ammonia nitrogen sewage denitrification device based on magnetosensitive thermal effect and carrier adsorption. Background technique

[0002] Among the existing denitrification processes, anammox is the most energy-saving biological denitrification technology. Anammox bacteria use nitrite as the electron acceptor to convert ammonia into nitrogen and a small amount of nitrate under anaerobic conditions. Saving aeration, low carbon source demand, and low sludge production are the most promising new denitrification technologies, and their applications in denitrification of sewage with high nitrogen-to-carbon ratios such as landfill leachate have been relatively mature.

[0003] However, urban low-temperature and low-ammonia-nitrogen sewage will affect the simultaneous...

Examples

Embodiment 1

[0032] This embodiment relates to a low-temperature low-ammonia-nitrogen sewage synchronous nitrosation-Anammox device based on the magnetic induction thermal effect, and its specific structure is as follows figure 1 Shown:

[0033]It includes a sewage treatment container 5, a composite filler 2 filled in the sewage treatment container 5 and a magnetic field generating device outside the sewage treatment container 5; a water inlet 1 and an air inlet 10 are provided at the bottom of the sewage treatment container 5 , the upper part of the sewage treatment container 5 is provided with a water outlet 7 and an air outlet 6; the interior of the composite filler 2 is a metal conductor 2-1, the middle layer is a protective layer 2-2, and the outer layer is a porous adsorption carrier layer 2- 3. Anammox bacteria and nitrosative bacteria grow on the porous adsorption carrier layer 2-3 from the inside to the outside; the solenoid coil 4 is connected to the voltage regulator 11 and the ...

Embodiment 2

[0042] The specific application of the low-temperature low-ammonia-nitrogen sewage synchronous nitrosation-Anammox process based on the magneto-inductive thermal effect involved in the embodiment, the steps are as follows:

[0043] 1) Pass the sewage with ammonia nitrogen concentration of 45-50 mg / L and COD concentration of 40-50 mg / L into the sewage from the lower water inlet to control the hydraulic retention time to 2-4h until the effluent ammonia nitrogen ≥ 5mg / L, then stop the water intake , empty the sewage treatment container, and complete the initial ammonia nitrogen adsorption;

[0044] 3) Add the sludge containing three functional bacteria AnAOB, AOB, and NOB from the upper part of the sewage treatment container to the reactor filled with composite fillers, and promote the uniform mixing of microorganisms and composite fillers through aeration and sewage water flow to maintain The DO concentration is 0.5-1.5mg / L. At the same time, the solenoid coil is energized, and ...

Embodiment 3

[0048] This embodiment relates to the distribution of AOB, AnAOB, and NOB inside and on the surface of the composite filler and its specific treatment process for ammonia nitrogen in sewage.

[0049] like figure 2 As shown, the alternating magnetic field generated by the external solenoid coil interacts with the metal inside the composite filler to generate eddy currents to generate heat, creating a local high-temperature microenvironment for the composite filler. On the one hand, it provides a suitable temperature for AOB and AnAOB, and improves microbial On the other hand, it is beneficial for AOB to win the competition with NOB (the outermost ring part in the figure), which expands the proportion of AOB, improves the accumulation rate of nitrous nitrogen, and reduces the impact of NOB and AnAOB on nitrous acid Salt competition promotes the growth of AnAOB (as shown in the light circle in the middle). The local high-temperature microenvironment maintains a significant diff...

technical field

[0001] The invention belongs to the technical field of sewage biological denitrification treatment, and in particular relates to a biofilm synchronous nitrosation-Anammox urban low-temperature, low-ammonia nitrogen sewage denitrification device based on magnetosensitive thermal effect and carrier adsorption. Background technique

[0002] Among the existing denitrification processes, anammox is the most energy-saving biological denitrification technology. Anammox bacteria use nitrite as the electron acceptor to convert ammonia into nitrogen and a small amount of nitrate under anaerobic conditions. Saving aeration, low carbon source demand, and low sludge production are the most promising new denitrification technologies, and their applications in denitrification of sewage with high nitrogen-to-carbon ratios such as landfill leachate have been relatively mature.

[0003] However, urban low-temperature and low-ammonia-nitrogen sewage will affect the simultaneous...

Examples

Embodiment 1

[0032] This embodiment relates to a low-temperature low-ammonia-nitrogen sewage synchronous nitrosation-Anammox device based on the magnetic induction thermal effect, and its specific structure is as follows figure 1 Shown:

[0033]It includes a sewage treatment container 5, a composite filler 2 filled in the sewage treatment container 5 and a magnetic field generating device outside the sewage treatment container 5; a water inlet 1 and an air inlet 10 are provided at the bottom of the sewage treatment container 5 , the upper part of the sewage treatment container 5 is provided with a water outlet 7 and an air outlet 6; the interior of the composite filler 2 is a metal conductor 2-1, the middle layer is a protective layer 2-2, and the outer layer is a porous adsorption carrier layer 2- 3. Anammox bacteria and nitrosative bacteria grow on the porous adsorption carrier layer 2-3 from the inside to the outside; the solenoid coil 4 is connected to the voltage regulator 11 and the ...

Embodiment 2

[0042] The specific application of the low-temperature low-ammonia-nitrogen sewage synchronous nitrosation-Anammox process based on the magneto-inductive thermal effect involved in the embodiment, the steps are as follows:

[0043] 1) Pass the sewage with ammonia nitrogen concentration of 45-50 mg / L and COD concentration of 40-50 mg / L into the sewage from the lower water inlet to control the hydraulic retention time to 2-4h until the effluent ammonia nitrogen ≥ 5mg / L, then stop the water intake , empty the sewage treatment container, and complete the initial ammonia nitrogen adsorption;

[0044] 3) Add the sludge containing three functional bacteria AnAOB, AOB, and NOB from the upper part of the sewage treatment container to the reactor filled with composite fillers, and promote the uniform mixing of microorganisms and composite fillers through aeration and sewage water flow to maintain The DO concentration is 0.5-1.5mg / L. At the same time, the solenoid coil is energized, and ...

Embodiment 3

[0048] This embodiment relates to the distribution of AOB, AnAOB, and NOB inside and on the surface of the composite filler and its specific treatment process for ammonia nitrogen in sewage.

[0049] like figure 2 As shown, the alternating magnetic field generated by the external solenoid coil interacts with the metal inside the composite filler to generate eddy currents to generate heat, creating a local high-temperature microenvironment for the composite filler. On the one hand, it provides a suitable temperature for AOB and AnAOB, and improves microbial On the other hand, it is beneficial for AOB to win the competition with NOB (the outermost ring part in the figure), which expands the proportion of AOB, improves the accumulation rate of nitrous nitrogen, and reduces the impact of NOB and AnAOB on nitrous acid Salt competition promotes the growth of AnAOB (as shown in the light circle in the middle). The local high-temperature microenvironment maintains a significant diff...

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