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Method for screening and identifying wastewater and treating poisonous substances in water

A technology for waste water and poisons, applied in the direction of testing water, material inspection products, etc., can solve the problems of complex toxic effect mechanism of pollutants, high cost, and complicated chemical analysis methods.

Inactive Publication Date: 2013-05-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of high toxicity and complex components of wastewater, complicated mechanism of pollutants’ compound toxic effect, difficulty in defining the ecological safety of treated effluent in existing wastewater discharge standards, cumbersome steps and high cost of chemical analysis methods, the present invention proposes a method for screening and identifying wastewater Compared with the method for treating toxic substances in effluent, it can more quickly and effectively screen and identify wastewater and treat toxic substances in effluent. This method can quickly and effectively determine the physical and chemical characteristics of toxic substances in wastewater, and initially determine the category of toxic substances. It provides an important basis for the identification of poisons, and can provide an important reference for the removal of poisons in wastewater

Method used

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  • Method for screening and identifying wastewater and treating poisonous substances in water
  • Method for screening and identifying wastewater and treating poisonous substances in water
  • Method for screening and identifying wastewater and treating poisonous substances in water

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Wastewater Sample Collection

[0064] The influent, activated sludge treatment process effluent, and A2O treatment process effluent of Changzhou Chengbei Sewage Treatment Plant were collected in different periods and at different times.

[0065] Toxicity differential evaluation, such as figure 1 Shown:

[0066] 1) Physical and chemical parameters of wastewater and initial toxicity test

[0067] Collect influent water, activated sludge treatment process effluent and A2O treatment process effluent, and transport them back to the laboratory on the same day, measure their basic physical and chemical parameters, and conduct 24h Daphnia magna (large flea) acute toxicity test on influent and effluent water, acute toxicity The test steps are as follows:

[0068] i. Experimental organisms

[0069] Newborn Daphnia magna less than 24 hours old. The cultivation method of D. magna refers to the "Standard Operating Procedure" provided by the U.S. EPA-Duluth Research Manual and t...

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Abstract

The invention discloses a method for screening and identifying wastewater and treating poisonous substances in water and belongs to the field of toxicological researches on environments and ecology. The method comprises the following steps of: poisonous substance characteristic analysis, poisonous substance identification, and poisonous substance confirmation. The problems that the wastewater is high in toxicity and complex in component, the composite toxic effect mechanism of poisonous substances is complex, the ecologic safety of the treated water is difficult to define by the traditional wastewater discharge standard and the chemical analysis method is complex in step, high in cost and the like are solved. The method can be used for rapidly and effectively judging the physical and chemical properties of poisonous substances existing in the wastewater and initially determining the types of the poisonous substances so as to provide an important basis for the further identification of the poisonous substances and provide an important reference basis for a removal scheme for the poisonous substances in the wastewater.

Description

technical field [0001] The invention relates to an ecological toxicity evaluation method of waste water and treated effluent, more specifically a method for screening and identifying toxic substances in waste water and treated effluent. Background technique [0002] The existing chemical analysis techniques are still difficult to directly or effectively identify the toxicity of various pollutants in environmental samples, including chemical screening and some related techniques. It is also difficult to predict the additive, antagonistic or synergistic effects in the complex pollution system, so a method for the identification and evaluation of biological toxicity of environmental samples has emerged. [0003] Since 1984, the United States has implemented a policy of controlling the discharge of industrial wastewater from the perspective of toxicity and implementing toxicity reduction policies for toxic industrial wastewater. When implementing the pollutant discharge permit ...

Claims

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Application Information

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IPC IPC(8): G01N33/18
Inventor 左玉辉丁中海刘远彬孙平华新柏益尧
Owner NANJING UNIV
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