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Method for strengthening biological treatment of organic wastewater difficult to degrade

A technology of organic wastewater and biological treatment, applied in the field of environmental engineering, can solve the problems that restrict the reasonable treatment and utilization of sludge, and achieve the effects of improving biological treatment efficiency, easy operation, and reducing microbial exogenous nutrients

Inactive Publication Date: 2009-12-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This seriously restricts the rational

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  • Method for strengthening biological treatment of organic wastewater difficult to degrade
  • Method for strengthening biological treatment of organic wastewater difficult to degrade
  • Method for strengthening biological treatment of organic wastewater difficult to degrade

Examples

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Embodiment 1

[0023] Example 1: Enhancing biological treatment of azo dye wastewater with excess sludge lysed mixed solution

[0024] [1] Establishment of A / O biological treatment process for azo dye wastewater

[0025] The influent is the simulated wastewater of azo dyes, and its composition is 200 mg / L of azo dyes listed in Table 1, 500 mg / L of glucose, (NH 4 ) 2 SO 4 、Na 2 HPO 4 、KH 2 PO 4 , trace CaCl 2 , MgSO 4 , FeCl 3 , COD:N:P=100:5:1, pH value is 7.0.

[0026] The inoculated microorganisms in the anaerobic and aerobic bioreactors were activated sludge, and the concentration of the inoculated microorganisms in the reactor was 5g / L.

[0027] Sludge acclimatization is carried out in batch mode. Dilute the original influent 4 times as the initial influent. Whenever the COD removal rate of the influent reaches 85% or more, gradually increase the concentration of azo dyes in the influent, and enter the next round of domestication until the domestication is completed.

[0028]...

Embodiment 2

[0041] Example 2: Residual sludge lysed mixed solution strengthens trinitrotoluene (TNT) wastewater biological treatment

[0042] [1] Establish TNT wastewater A / O biological treatment process

[0043] The influent is TNT simulated wastewater, and its composition is TNT 80mg / L, glucose 300mg / L, (NH 4 ) 2 SO 4、Na 2 HPO 4 、KH 2 PO 4 , trace CaCl 2 , MgSO 4 , FeCl 3 , COD:N:P=100:5:1, pH value is 7.0.

[0044] The inoculated microorganisms in the anaerobic and aerobic bioreactors were activated sludge, and the concentration of the inoculated microorganisms in the reactor was 5g / L.

[0045] Sludge acclimatization is carried out in batch mode. Dilute the original influent 3 times as the initial influent. Whenever the COD removal rate of the influent reaches more than 85%, gradually increase the TNT concentration in the influent, and enter the next round of domestication until the domestication is completed.

[0046] After the sludge acclimatization is completed, the reac...

Embodiment 3

[0054] Embodiment 3: Residual sludge lysate mixed solution strengthens pentachlorophenol wastewater biological treatment

[0055] [1] Establishment of pentachlorophenol wastewater A / O biological treatment process

[0056] The influent is pentachlorophenol simulated wastewater, which consists of pentachlorophenol 50mg / L, glucose 300mg / L, (NH 4 ) 2 SO 4 、Na 2 HPO 4 、KH 2 PO 4 , trace CaCl 2 , MgSO 4 , FeCl 3 , COD:N:P=100:5:1, pH value is 7.0.

[0057] The inoculated microorganisms in the anaerobic and aerobic bioreactors were activated sludge, and the concentration of the inoculated microorganisms in the reactor was 5g / L.

[0058] Sludge acclimatization is carried out in batch mode. Dilute the original influent 3 times as the initial influent. Whenever the influent COD removal rate reaches 85% or more, gradually increase the concentration of pentachlorophenol in the influent, and enter the next round of domestication until the domestication is completed.

[0059] Af...

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Abstract

The invention relates to a method for strengthening the biological treatment of organic wastewater difficult to degrade, belonging to the technical field of the water treatment of environmental engineering. The method is characterized in that cell dissolution treatment is carried out on excess sludge generated in an A/O biological treatment technology of organic wastewater difficult to degrade, cell dissolution mixed liquid is directly returned to an anaerobic reactor or supernatant liquid after solid-liquid separation is returned to an anaerobic reactor, and residues are used for other aims. The invention has the effects and advantages that the invention effectively solves secondary pollution caused by the loss of external artificial synthesis oxidation-reduction media along with effluent water in the biological treatment of the organic wastewater difficult to degrade, can greatly reduce the external nutrient substances of microorganisms, provides a strengthening biological treatment technology with economy, high efficiency and zero discharge of the excess sludge for wastewater of this category and has extensive application prospect in the treatment of wastewater in dye, detonators, pesticide, medicine, and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to a method for strengthening the biological treatment of refractory organic wastewater. Background technique [0002] With the development of industry and agriculture, a large number of toxic and refractory organic substances have been produced, such as halogenated, azo-containing and nitroaromatic compounds, etc. These compounds are widely used in people's production and life and enter the natural environment through various channels, showing the characteristics of long-term residue and high toxicity. Some of these substances have teratogenic or carcinogenic effects, and can bioaccumulate in the food chain, seriously threatening human life. [0003] There are physical, chemical and biological methods and combinations of these methods for the treatment of wastewater containing toxic and refractory organic matter. Because the biological method has the advantages of ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F11/00C02F11/10
Inventor 王竞谭少卿吕红周集体张爱丽金若菲雷天鸣柳广飞
Owner DALIAN UNIV OF TECH
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