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Use of rare-earth element in cultivating aerobic particle mud and controlling mud expansion

A technology of aerobic granular sludge and rare earth elements, applied in water/sludge/sewage treatment, rare earth metal compounds, biological water/sewage treatment, etc., can solve the problems of aerobic granular sludge and no in-depth research.

Inactive Publication Date: 2008-06-11
SHANDONG UNIV
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Problems solved by technology

[0011] 2. Aerobic granular sludge
Scholars at home and abroad have done a lot of meticulous work in the research of aerobic granular sludge. From 1991 to 1998, it was the initial stage of research on aerobic granular sludge, and they began to realize that sludge can also be granulated in an aerobic environment. At the stage, only the phenomenon of aerobic granular sludge was reported, and no in-depth research was carried out.

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  • Use of rare-earth element in cultivating aerobic particle mud and controlling mud expansion

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Embodiment Construction

[0028] The application of the present invention will be further introduced below with specific implementation examples:

[0029] This example is a specific application of using rare earth elements to cultivate aerobic granular sludge. It takes 28 days from the start of the reactor to the formation of aerobic granular sludge in the reactor. Two reactors run simultaneously, and wherein SBR I reactor starts to add a rare earth element (lanthanum nitrate) solution every 3 days, makes the concentration of rare earth element in the reactor be 30mg / L. The whole process is divided into three operation phases.

[0030] Run Phase 1

[0031] Before inoculation, the activated flocculent sludge is continuously aerated with diluted beer wastewater for 4 days to make the sludge initially domesticated. The activated flocculent sludge is a typical filamentous structure connection, the color is yellowish brown, the structure is loose, and the specific gravity is small. . After the reactor is...

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Abstract

The present invention discloses the application of RE element in cultivating aerobic sludge particle and controlling sludge expansion. During cultivating aerobic sludge particle, RE element solution of concentration below 30 mg / L is thrown into the biochemical reactor once every three days. Thus cultivated aerobic sludge particle with RE element has short forming period, large particle, low water content, high deposition rate, low SVI, high COD load and other advantages.

Description

technical field [0001] The invention relates to the fields of biological effects of rare earths and environmental microorganisms, and in particular to utilizing the unique biological characteristics of rare earth elements in microorganisms and applying them to the rapid cultivation of aerobic granular sludge and the control of sludge bulking. Background technique [0002] 1. Rare earth [0003] China is a country with a large amount of rare earth resources, and it ranks among the world's leading countries in terms of rare earth mineral products, total resources and industrial reserves. The application of rare earths is becoming more and more extensive. It is known that rare earths are used in metallurgical industry, petrochemical industry, agriculture, medicine and other fields. The research on the biological activity of rare earth elements began in the early 20th century. From a large number of documents, it is known that rare earth elements have a wide range of biological...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/38C01F17/00C02F3/12
CPCY02W10/10
Inventor 李善评乔鹏赵玉晓
Owner SHANDONG UNIV
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