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Method for reinforcing sludge granulation by adding ferroferric oxide magnetic nanoparticles

A technology of magnetic nanoparticles and ferroferric oxide, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of long cultivation time of aerobic granular sludge, and achieve Good ammonia nitrogen conversion and phosphorus removal performance, improved phosphate removal rate, and compact particle structure

Pending Publication Date: 2022-03-04
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0007] Aiming at the problem of long cultivation time of aerobic granular sludge in the prior art, the present invention provides a method for enhancing sludge granulation by adding ferroferric oxide magnetic nanoparticles

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  • Method for reinforcing sludge granulation by adding ferroferric oxide magnetic nanoparticles
  • Method for reinforcing sludge granulation by adding ferroferric oxide magnetic nanoparticles
  • Method for reinforcing sludge granulation by adding ferroferric oxide magnetic nanoparticles

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Embodiment Construction

[0040] The invention realizes rapid cultivation of aerobic granular sludge by adding ferroferric oxide magnetic nanoparticles into an AGSBR reactor with municipal sewage as a substrate. Add ferroferric oxide magnetic nanoparticles to strengthen the sludge granulation system, such as figure 1 As shown, it includes liquid inlet barrel 6, liquid inlet pipe, AGSBR reactor 7, aeration unit, dosing unit, liquid outlet pipe, liquid outlet barrel 12 and control unit. The effective volume of the AGSBR reactor 7 is 6L, and the drainage ratio is 50%. The AGSBR reactor 7 is provided with a stirrer 2, and five sampling ports 8 are opened on the side.

[0041] The liquid inlet pipe is connected with the liquid inlet 16 of the AGSBR reactor 7, and the liquid inlet pipe extends into the liquid inlet barrel 6, which contains waste water, and the liquid inlet pipe is connected with the liquid inlet pump 5 for feeding the AGSBR reactor 7 into the water. The liquid outlet pipe is connected wit...

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Abstract

The invention relates to a method for reinforcing sludge granulation by adding ferroferric oxide magnetic nanoparticles. The method comprises the following steps: (1) inoculating secondary sedimentation tank return sludge in an AGSBR (Absorbed Gas Sequencing Batch Reactor); (2) operating the AGSBR reactor at normal temperature, wherein each operation cycle comprises water feeding, anaerobic stirring, aeration, precipitation, drainage and idling; (3) adding ferroferric oxide magnetic nanoparticles in an anaerobic stirring stage; (4) stopping adjusting the settling time when the granular sludge is preliminarily formed; and (5) regularly carrying out microscopic examination on the sludge. The system comprises a liquid inlet pipe, an AGSBR reactor, an aeration unit, a dosing unit, a liquid outlet pipe and a control unit, the liquid inlet pipe and the liquid outlet pipe are respectively connected with a liquid inlet and a liquid outlet of the AGSBR reactor, and a microporous aeration head of the aeration unit is arranged in the AGSBR reactor. According to the method, the municipal sewage is taken as a substrate, and the ferroferric oxide magnetic nano-particles are added to serve as induced crystal nucleuses formed by the particles, so that the forming time of the aerobic granular sludge is successfully shortened.

Description

technical field [0001] The invention relates to a method for cultivating aerobic granular sludge by adding ferroferric oxide magnetic nanoparticles, which is especially suitable for cultivating aerobic granular sludge with municipal sewage, and belongs to the technical field of sewage biological treatment. Background technique [0002] The traditional activated sludge process is currently the main form of biological nitrogen and phosphorus removal in sewage treatment plants, which has problems such as low treatment efficiency and high energy consumption. Under the background of "carbon peak" and "carbon neutrality", it is urgent to explore new efficient and energy-saving sewage treatment processes. [0003] The main forms of microbial aggregation in the sewage treatment system are flocculent sludge, biofilm and granular sludge. Aerobic granular sludge is a special biofilm structure formed by self-aggregation of microorganisms. It has the advantages of smooth surface, high d...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCC02F3/12Y02W10/10
Inventor 潘凯玲李耀先邱晨刘璞晗程丽华毕学军
Owner QINGDAO TECHNOLOGICAL UNIVERSITY