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Reinforced aerobic granular sludge culture method

A technology of aerobic granular sludge and cultivation method, applied in the fields of environmental protection and sewage treatment, can solve the problems of long cultivation time of aerobic granular sludge, difficult formation of aerobic granular sludge, long formation time, etc.

Inactive Publication Date: 2011-08-17
SHANDONG UNIV
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  • Abstract
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of long cultivation time of aerobic granular sludge, and to provide a method for using a magnetic field to promote the formation of granular sludge
However, the cultivation time of general aerobic granular sludge needs 60 to 80 days, so the present invention speeds up the process of aerobic sludge granulation, and solves the problems that aerobic granular sludge is not easy to form and the formation time is too long

Method used

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Embodiment

[0016] A gas-lift batch reactor is used, and two permanent magnets (25cm×100cm×150cm) are installed on the outer bottom of the gas-lift batch reactor, with a distance of 10cm between the two magnets to generate a statically stable magnetic field of 48.0mT.

[0017] The air-lift batch reactor consists of an inner tube 9 and an outer tube 11 with an effective volume of 3.5 L, an outer tube with a diameter of 10.0 cm and a height of 100 cm, an inner tube 9 with a diameter of 7.0 cm and a height of 70 cm, and a distance between the inner tube 9 and the outer tube 11 of 2 cm. The air enters the reactor through the microporous aeration head 3 installed in the center of the bottom of the reactor by the air pump 4, and the air flow formed pushes the liquid and granular sludge in the reactor to move upward in the inner pipe 9, and then downward between the inner and outer pipe walls After reaching the bottom of the reactor, it is pulled upward by the airflow again, so that the mixed liq...

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Abstract

The invention discloses a reinforced aerobic granular sludge culture method, and belongs to the field of sewage treatment. The method comprises the following steps of: arranging symmetrical permanent magnets at the outer side of the bottom of a sequencing batch airlift reactor (SBAR), so that stable static magnetic fields are generated in the reactor; simultaneously adding flocculent aerobic active sludge serving as seed sludge into the SBAR, and performing aerobic granular sludge culture; and operating the SBAR in a mode of water inlet, aeration, settlement and drainage. By the method, the formation of the aerobic granular sludge can be accelerated, the complete granulation time of the flocculent active sludge is shortened to 3 to 4 weeks, and the problem of overlong culture time of the conventional aerobic granular sludge is solved. The aerobic granular sludge obtained by the method has good stability, and the chemical oxygen demand (COD) and the ammonia nitrogen removal effect can be remarkably improved.

Description

1. Technical field [0001] The invention belongs to the fields of environmental protection and sewage treatment. Specifically, it relates to a method for applying a magnetic field to promote the formation of aerobic granular sludge in an air-lift batch reactor. 2. Background technology [0002] Microbial granulation is a phenomenon in which cells combine with each other through biological, physical and chemical effects. It refers to the interaction between microorganisms in the reactor and carriers or microorganisms to form large and dense granular Sludge aggregates are mainly composed of microbial cells, extracellular polymers, inorganic salts and other sediments. The bioparticles formed by microorganisms through self-aggregation are dense particles formed by different bacterial species, and these different bacterial species play different roles in degrading wastewater with complex components. Compared with traditional activated sludge, the main characteristics of granular...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 王新华刁目贺王曙光石义静高明明杨英
Owner SHANDONG UNIV
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