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Fast construction method of high-salt wastewater biological treatment system

A technology for biological treatment and high-salt wastewater, applied in the fields of environmental protection and sewage treatment, can solve the problems of poor stability of aerobic granular sludge, improper control of salinity elevation gradient, slow salinity elevation gradient, etc., so as to avoid serious system failure. Stable, excellent impact resistance, to achieve the effect of forming thickening

Inactive Publication Date: 2010-06-02
CHONGQING UNIV
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  • Description
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  • Application Information

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Problems solved by technology

Although this process achieves the construction of a biological treatment system without adding halophilic bacteria, in order to realize the granulation of sludge, the process starts the reactor at a salinity of less than 1%, and at the same time the salinity increases the gradient Slower (less than 0.5% gradient per salinity increase), making it take longer to build
In addition, if the gradient of salinity is not properly controlled, it is easy to cause the particles to swell and break. At the same time, the bacterial gelatinous granular sludge formed under high-salt conditions is easily replaced by filamentous bacterial granular sludge, which makes the fine particles formed under high-salt conditions Oxygen granular sludge is less stable [i, ii, iii]

Method used

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  • Fast construction method of high-salt wastewater biological treatment system
  • Fast construction method of high-salt wastewater biological treatment system
  • Fast construction method of high-salt wastewater biological treatment system

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Effect test

Embodiment 1

[0033] The wastewater to be treated is high-salt mustard mustard pickling wastewater, its COD value is about 5000mg / L, and the target salinity is 7% (but why use 7% in the second stage?), and its salinity is controlled at 3% and 7% salinity values, using figure 1 The shown treatment device is at 3% initial salinity, and the influent organic load is 0.5kgCOD / (m 3 · d), DO 6mg / L or so, starting under the condition of influent salinity of 3%, the first stage of operation is carried out, the water temperature is 25-30°C, the reactor operates in one cycle per day, and the operating condition is that the influent water is 0.25 h→reaction 23.5h→precipitation and drainage for 0.25h, a total of 24h, after 10 days of operation, the COD removal rate can reach 90%, and the reactor enters the second stage of operation;

[0034] In the second stage of operation, the salinity of the influent is changed to 7%. Since the salinity of the first stage of the reactor is 3%, and the drainage ratio...

Embodiment 2

[0037] The wastewater to be treated is high-salt mustard mustard pickling wastewater, its COD value is about 5000mg / L, and the target salinity is 6%. The salinity is controlled at two salinity values ​​of 3% and 6% by adding NaCl. figure 1 The treatment device shown is at 3% initial salinity, and the influent organic load is 1.0kgCOD / (m 3 d), DO 6mg / L or so, inoculate the activated sludge of urban sewage plant to make the sludge concentration in the reactor 8g / L, the reactor film density (filler filling ratio) is 30%, and the influent salinity is 3% Start under the conditions of the first stage of operation, the water temperature is 25 ~ 30 ℃, the reactor is operated in a cycle per day, and the operating conditions are 0.15h of water intake → 23.7h of reaction → 0.15h of sedimentation and drainage, a total of 24h, after 10 days of operation , the COD removal rate can reach 88%, and the reactor enters the second stage of operation; after 10 days, the salinity in the reactor can...

Embodiment 3

[0039] Using high-salt simulated wastewater (composed of domestic sewage, glucose, ammonium chloride, potassium dihydrogen phosphate, etc.), the COD value is about 5000mg / L, the target salinity is 7%, and the salinity is controlled by adding NaCl to 3% and 7% for both salinity values, using figure 1 The shown treatment device is at 3% initial salinity, and the influent organic load is 0.5kgCOD / (m 3 · d), DO 6mg / L or so, starting under the condition of influent salinity of 3%, the first stage of operation is carried out, the water temperature is 25-30°C, the reactor operates in one cycle per day, and the operating condition is that the influent water is 0.25 h→reaction for 23.5h→precipitation and drainage for 0.25h, a total of 24h. After 10 days of operation, the COD removal rate can also reach 90%. The reactor enters the second stage of operation, and the target salinity is 7%. The salinity can reach the target salinity of 7%. At the same time, the reactor can efficiently rem...

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Abstract

The invention discloses a fast construction method of a high-salt wastewater biological treatment system. The method is characterized in that activated sludge of a urban sewage treatment plant is inoculated in a sequencing batch type biological reactor to form a biological film on a combination padding, a certain start running method and a sludge acclimation method are adopted to realize apposition growth of the activated sludge in a high-salt environment with the salt content of 3 percent (calculating NaCl, the same below) in the reactor without adding halophilic bacteria, and a complex microbial biological film treatment system suitable for microbe to growth with the definite salt content is formed at last.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and environmental protection, and specifically relates to a rapid construction technology of a high-salt wastewater biological treatment system, especially the ability to use a biofilm system and a sequencing batch reactor to control salinity in a high-salt wastewater treatment system. Shock resistance to achieve rapid and efficient construction of biological treatment systems at target salinities. Background technique [0002] With the development of industry and the lack of water resources, the high-salt (salinity above 15g / L) production wastewater produced by some industrial industries, such as saponin wastewater, oil extraction wastewater, dye processing wastewater, food processing wastewater, etc., is polluted The concentration of pollutants is getting higher and higher, the composition is becoming more and more complex, and the emissions will also be increasing, which will gradually...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/10C02F103/26C02F103/10C02F103/32
CPCY02W10/10
Inventor 周健陈垚方俊华干丽莎李晓品卿晓霞
Owner CHONGQING UNIV
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