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Method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage

A technology for aerobic granular sludge and urban sewage, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. Problems such as long start-up time of sludge process

Inactive Publication Date: 2010-06-30
杨国靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, relevant research reports show that the start-up time of the aerobic granular sludge process is generally long, at least 2 to 4 months, and some even longer, and the slow start-up speed has become a bottleneck restricting the large-scale application of the aerobic granular sludge technology.

Method used

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  • Method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage
  • Method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage
  • Method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage

Examples

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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a sequencing batch SBR reactor with an aspect ratio of 3-12 and a volume exchange rate of 80% is used. The main body of the reactor is a plexiglass cylinder, the effective height of the cylinder is 0.3-1.1m, and the inner diameter of the cylinder is 0.09m , the effective volume is 7L; a group of microporous aeration heads 4 are arranged at the bottom of the reactor, and the ACO electromagnetic air compressor 2 is used to supply air, and the aeration rate is regulated by the rotameter 3, and the reactor is fed with water through the water pump 9, and the The time of each stage of water, anaerobic stirring, aeration, sedimentation, drainage, etc. is set according to the needs of the test, and is automatically controlled by the time controller 7; the water is added through the reservoir 6; the function of the agitator 10 is to make the particles The sludge is in a suspended state by stirring in the anaerobic stage; after sewage treatment, it is d...

Embodiment 2

[0032] This embodiment adopts the aerobic granular sludge obtained in Example 1 as inoculated sludge, figure 1 The shown sequencing batch SBR reactor is used to treat low-carbon source, high-concentration nitrogen and phosphorus wastewater, and investigate the simultaneous denitrification and phosphorus removal ability of the above-mentioned aerobic granular sludge. The main body of the reactor is a plexiglass cylinder, the effective height of the cylinder is 1.1m, the inner diameter of the cylinder is 0.09m, and the effective volume is 7L; the bottom of the reactor is equipped with a group of microporous aeration heads 4, and the ACO electromagnetic air compressor 2 is used The air supply and aeration volume are regulated by the rotameter 3, and the reactor is fed with water through the water inlet pump 9, and the time of each stage of water inlet, aeration, sedimentation, and drainage is set according to the needs of the test, and is automatically realized by the time control...

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Abstract

The invention relates to a method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage, which comprises two reaction stages: (1) flocculent activated sludge is added in a sequencing batch reactor (SBR) as seed sludge, the domestic sewage is fed in the SBR which automatically operates according to the mode of water inlet-aeration-hypoxia-secondary aeration-precipitation-drainage, activated carbon powder and Mg2+ are added in the domestic sewage in the fourth day or fifth day after culturing, 10-20 days are needed in the stage, and the aerobic granular sludge with organism-removing and synchronous denitrifying capability can be obtained after 30-60 cycles; and (2) the SBR automatically operates according to the mode of water inlet-anaerobic mixing-aeration-precipitation-drainage-standing, 10-15 days are needed in the stage, and the aerobic granular sludge with high-efficient and synchronous denitrifying phosphorus-removing capability can be obtained after 20-45 cycles. In the invention, the culture time of the synchronous denitrifying phosphorus-removing aerobic granular sludge is shortened to 20-35 days, while in the prior art, 60-120 days are required generally.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, in particular to a method for rapid cultivation of aerobic granular sludge and the removal of biological nutrients. Background technique [0002] With the rapid development of my country's industrial and agricultural production and the improvement of people's living standards, the problem of water eutrophication caused by biological nutrients such as nitrogen, phosphorus and organic matter is becoming more and more serious. Therefore, the treatment of sewage not only needs to remove COD, but also To remove nitrogen and phosphorus, this requires the sewage treatment system to have a variety of treatment functions. Biological nitrogen and phosphorus removal is one of the most widely used methods to reduce the pollution of biological nutrients such as nitrogen and phosphorus. Traditional biological nitrogen and phosphorus removal processes generally involve nitrification, den...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 杨国靖李小明杨麒廖德祥罗薇楠夏静芬
Owner 杨国靖
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