A method of applying nano-magnets to promote granulation of flocculent activated sludge

A nano-magnet, activated sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the complicated preparation method of modified nanospheres and the large amount of modified nanospheres , the amount of magnetite and other problems, to shorten the sludge granulation time, promote the granulation process, and reduce operating costs.
CN107235552BActive Publication Date: 2020-05-08SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2020-05-08

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Abstract

The invention relates to a method for promoting the granulation of flocculent activated sludge by applying nano magnet. The method comprises the following steps: mixing the flocculent activated sludge, the nano magnet and sewage; promoting the granulation of the flocculent activated sludge by interaction between the nanodots and the flocculent activated sludge; performing the granulation process at room temperature according to a cycle, and sufficiently aerating within each cycle. According to the method disclosed by the invention, the granulation process of the activated sludge can be effectively shortened; by adding a small amount of the nano magnet, the granulation time of the sludge can be effectively shortened and the cost is low; in addition, obtained particles are denser and better in stability. The method disclosed by the invention has the advantages of simple process, mild reaction conditions, safety and no toxicity to environment and facilitation for engineering application; the method can be performed at normal temperature and normal pressure.
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Description

technical field

[0001] The invention relates to a method for promoting the granulation of flocculent activated sludge by using a nanometer magnet, which belongs to the technical field of environmental chemistry and waste water treatment. Background technique

[0002] Aerobic granular sludge is a special form of microbial immobilization technology and a new wastewater biological treatment technology that has emerged in recent years. Aerobic granular sludge is a compact and regular biological aggregate formed by activated sludge microorganisms through self-fixation. Compared with flocculent activated sludge, aerobic granular sludge has the advantages of dense structure, excellent settling performance, and diverse microbial populations, etc. It has high tolerance to shock loads, toxic substances, and heavy metals, and is It has a good treatment effect on refractory pollutants; using aerobic granular sludge to treat sewage in a sequencing batch reactor does not require secondar...

Claims

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