Low-temperature low-ammonia-nitrogen sewage denitrification device based on magnetocaloric effect coupling carrier

A magnetocaloric effect, low ammonia nitrogen technology, applied in the field of sewage biological denitrification treatment, can solve the problems of low activity of AOB and AnAOB, increased energy consumption, unstable bacterial flora, etc.

Active Publication Date: 2021-09-10
南京富磁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low AOB and AnAOB activity, unstable flora, no competitive advantage of flora, difficulty in maintaining a high concentration of flora, and significant increase in energy consumption due to measures such as heating and heat preservation in the process of using the Canon process to treat low-temperature, low-ammonia-nitrogen sewage, The invention provides a low-temperature low-ammonia-nitrogen sewage denitrification device and denitrification method based on a magnetic-caloric effect coupling carrier

Method used

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  • Low-temperature low-ammonia-nitrogen sewage denitrification device based on magnetocaloric effect coupling carrier
  • Low-temperature low-ammonia-nitrogen sewage denitrification device based on magnetocaloric effect coupling carrier

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Embodiment 1

[0033] This embodiment relates to a low-temperature low-ammonia-nitrogen sewage denitrification device based on a magnetic-caloric effect coupling carrier, and its specific structure is as follows figure 1 Shown:

[0034] Including the sewage treatment container 5, the magnetic heat carrier 3 in the sewage treatment container 5, and the magnetic field generating device outside the sewage treatment container 5; a water inlet 1 and an air inlet 10 are arranged at the bottom of the sewage treatment container 5, The upper part of the processing container 5 is provided with a water outlet 7 and an air outlet 6; the magnetic heat carrier 3 is loaded with nano-Fe 3 o 4 Zeolite has anammox bacteria and nitrosative bacteria growing on its inside and surface.

[0035] In this embodiment, the sewage treatment container 5 is made of plexiglass.

[0036] In this example, the magnetic heat carrier 3 is prepared according to the scheme disclosed in CN201510157695.9, and the particle size ...

Embodiment 2

[0042] The specific application of the low-temperature low-ammonia-nitrogen sewage denitrification process based on the magnetocaloric effect coupling carrier involved in the embodiment, the steps are as follows:

[0043] 1) Pass the sewage with ammonia nitrogen concentration of 45-50 mg / L and chemical oxygen demand COD concentration of 40-50 mg / L into the sewage from the lower water inlet to control the hydraulic retention time from 0.25-1.25h until the effluent ammonia nitrogen is ≥5mg / L L is to stop water intake, empty the sewage treatment container, and complete the initial ammonia nitrogen adsorption;

[0044]2) Add the sludge containing AnAOB, AOB, and NOB three functional bacteria from the upper part of the sewage treatment container into the reactor filled with magnetic heat carrier, and promote the uniform mixing of microorganisms and magnetic heat carrier through aeration and sewage flow , maintain the dissolved oxygen DO concentration at 0.5-1.0 mg / L, turn on the ma...

Embodiment 3

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

[0049] Such as figure 2 As shown, the nano-Fe loaded by the magnetothermal carrier 3 o 4 Under the action of the external medium-high frequency alternating magnetic field, the heating effect is generated due to the Neil relaxation phenomenon, creating a local high-temperature microenvironment, creating a suitable temperature microenvironment for AnAOB with the optimum growth environment temperature of 30-35°C, improving microbial activity and Form a competitive advantage; on the other hand, because the temperature environment of 30-35 ° C is conducive to AOB winning in the competition with NOB, the accumulation rate of nitrite nitrogen is improved, and the growth of AnAOB is provided with sufficient reaction substrate, which promotes the growth of AnAOB. grow. Zeolite efficientl...

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Abstract

The invention relates to a low-temperature low-ammonia-nitrogen sewage denitrification device based on a magnetocaloric effect coupling carrier. The low-temperature low-ammonia-nitrogen sewage denitrification device comprises a sewage treatment container, the magnetocaloric carrier in the sewage treatment container and a magnetic field generation device outside the sewage treatment container, wherein the magnetocaloric carrier is nano Fe3O4-loaded zeolite, and anaerobic ammonia oxidizing bacteria and nitrite bacteria grow in the magnetocaloric carrier and on the surface of the magnetocaloric carrier. According to the device, a one-stage Canon process is adopted, precise local controllable temperature rise can be realized through a magnetocaloric effect generated by an external medium-high frequency alternating magnetic field and zeolite-loaded nano Fe3O4, zeolite selectively adsorbs ammonia nitrogen to create a local high-nitrogen-carbon-ratio environment, and the device has targeted advantages for solving the problem of low-temperature low-ammonia-nitrogen sewage denitrification treatment, anaerobic ammonia oxidizing bacteria and nitrite bacteria are efficiently screened, the competitive advantages of the bacteria are kept, the microbial activity is efficiently improved with low consumption, 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 low-temperature low-ammonia nitrogen sewage denitrification device based on a magnetic-caloric effect coupling carrier. Background technique [0002] The water temperature of sewage in spring and winter in northern my country is 7-15°C, and the lowest temperature in some areas can reach below 5°C. In the sewage treatment process, the degradation rate of organic matter slows down under low temperature conditions, and the reaction is not complete. When the temperature is lower than 15°C, the nitrification rate decreases sharply, and when the temperature is lower than 5°C, the nitrification reaction almost stops; Under low temperature conditions, the reaction speed is significantly reduced; nitrosative bacteria AOB and anammox (Anammox) AnAOB have weak competitiveness at low temperature, and it is extremely difficult for AOB and AnAO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/30
CPCC02F3/2806C02F3/2866C02F3/301C02F3/307C02F3/305C02F2301/106C02F2203/004C02F2003/001
Inventor 金正宇邢玉坤陈舒婷吴咏敬宋雪宁
Owner 南京富磁科技有限公司
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