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Method for rapidly cultivating aerobic particle sludge by load control technique

An aerobic granular sludge and load technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. Effect

Inactive Publication Date: 2009-07-01
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention can effectively cultivate high-efficiency and stable aerobic granular sludge with the help of specific operating load regulation technology, which has not been involved in the previous aerobic granular cultivation method

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  • Method for rapidly cultivating aerobic particle sludge by load control technique
  • Method for rapidly cultivating aerobic particle sludge by load control technique
  • Method for rapidly cultivating aerobic particle sludge by load control technique

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Embodiment Construction

[0031] Initial operation stage: Sequencing batch bioreactor is inoculated with sludge (it can be conventional flocculent aerobic activated sludge or residual anaerobic digested sludge), and strong measures of "no-load aeration" are taken to improve initial sludge settlement The performance, that is, the influent substrate i.e. the organic load is zero, and the influent and discharge are operated as normal. Due to the lack of nutrient substrate in the feed, sludge microorganisms perform endogenous respiration, and some microorganisms autolyze and decompose; at the same time, the activity of microorganisms decreases, and they tend to aggregate and grow. After about a week, the sludge flocs became smaller, the settling performance was greatly improved, the SS and SVI values ​​decreased significantly, the sludge became denser, and the settling performance was improved.

[0032] Operational load regulation stage: After the initial improvement of the sludge properties, the SBR react...

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Abstract

The invention relates to a method for rapidly culturing aerobic particle sludge through load modulation technology and belongs to the technical field of wastewater biotreatment. To solve the problems that the prior aerobic particle sludge culture technology is not perfect or accurate and has long time and the like, the invention provides a simple and stable method for culturing the aerobic particle sludge; the method comprises the following steps: common active sludge is taken out and is filled into a sequencing batch type bioreactor for idle aeration; after the settling property of the sludge is improved, the operating load of the sludge in the reactor is modulated; a floccule / particle mixture with better settling property appears at certain COD concentration; at the moment, load is rapidly declined so as to remove the floccule sludge in the reactor; and subsequently, the COD concentration of inlet water is modulated to change feed organic load or sludge load and promote the growth and stability of the aerobic particle sludge. According to the method, the aerobic particle sludge with good settling property, stable property and high activity can be obtained.

Description

Technical field: [0001] The invention relates to a method for cultivating aerobic granular sludge in the field of wastewater biological treatment. In particular, it relates to an operation control technology and main points of operation control for cultivating aerobic granular sludge in a sequencing batch batch reactor (SBR) process. Background technique: [0002] In the current sewage treatment system, biological treatment is still the most environmentally beneficial treatment method, and it is widely used in the treatment of urban sewage and industrial wastewater. The use of aerobic granular sludge to treat various harmful substances in wastewater is a hot spot in wastewater biological treatment in recent years. Compared with the ordinary activated sludge method, aerobic granular sludge has the advantages of good settling performance, high activity, high biomass concentration and strong impact resistance, and can improve the water exchange ratio and material reaction rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 竺建荣张铭川史晓慧孔云华
Owner BEIJING NORMAL UNIVERSITY
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