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Method for identifying key toxication substances in coal chemical wastewater

A coal chemical wastewater, key technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of increased biological toxicity, acute biological toxicity changes, biochemical microorganism growth inhibition and death, etc., achieve stable biological toxicity, and reduce chromatographic peak overlap. the effect of interference

Inactive Publication Date: 2019-09-06
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the previous pretreatment such as recovery of phenol ammonia, the content of highly toxic pollutants in the wastewater is still high, and the biodegradability is still poor. When the biochemical device is running stably, the COD of the effluent is generally higher than 300mg / L
What's more serious is that when the routine control indicators such as COD and total phenol content of the biochemical influent do not show obvious abnormalities, the overall biological toxicity of the biochemical influent often increases significantly, leading to growth inhibition or even widespread death of biochemical microorganisms. Deterioration of biochemical effluent indicators
[0003] Under the current technical means, in the case that the content of known strong biological toxicity pollutants such as phenols, cyanides, thiocyanides, ammonia, and sulfides is stable, it is found that the acute biological toxicity will still change significantly. It can be known that there are other Toxic effects of unspecified toxic pollutants

Method used

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  • Method for identifying key toxication substances in coal chemical wastewater
  • Method for identifying key toxication substances in coal chemical wastewater
  • Method for identifying key toxication substances in coal chemical wastewater

Examples

Experimental program
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Embodiment 1

[0041] In a company that uses lignite as raw material and produces natural gas after gasification in a Lurgi gasifier, the operation of the biochemical unit has been unstable after the effluent from the phenolic ammonia recovery unit enters the biochemical unit. Diagnose using the method proposed by the present invention. The steps are:

[0042] (1) Analyze the composition of pollutants in coal chemical wastewater before biochemical treatment

[0043] Pollutant classification: sewage pretreatment, the sewage pretreatment steps are: use trioctylamine to extract the acidified water sample at a volume ratio of 1:1, and extract and separate the acidic components of phenols and fatty acids in the wastewater;

[0044] Using XAD-4 resin, the organic substances in the sewage were divided into five categories: acidic organic substances, hydrophilic substances, hydrophobic acidic substances, hydrophobic alkaline substances, and hydrophobic neutral substances.

[0045] Qualitative anal...

Embodiment 2

[0058] An enterprise that uses lignite as raw material to produce tar and semi-coke after pyrolysis has not been able to meet the standard treatment in the operation of biochemical equipment. Diagnose using the method proposed by the present invention. Step is with embodiment 1.

[0059] (1) Analyze the composition of pollutants in coal chemical wastewater before biochemical treatment

[0060] Pollutant classification: sewage pretreatment, the sewage pretreatment steps are: use trioctylamine to extract the acidified water sample at a volume ratio of 1:1, and extract and separate the acidic components of phenols and fatty acids in the wastewater;

[0061] Using XAD-4 resin, the organic substances in the sewage were divided into five categories: acidic organic substances, hydrophilic substances, hydrophobic acidic substances, hydrophobic alkaline substances, and hydrophobic neutral substances.

[0062] Qualitative analysis: the separated acidic components of phenols and fatty ...

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Abstract

The invention discloses a method for identifying key toxication substances in coal chemical wastewater. The method comprises the following steps: (1), carrying out pollutant classification, qualitative analysis and quantitative analysis to measure the actual concentrations (CR) of all key pollutants in biochemical incoming water and using determined key pollutants as study objects in next biotoxicity evaluation analysis and evaluation; (2), establishing a correlation equation, drawing a relationship curve, and determining a half effective concentration (EC50 value) of a single pollutant; and designing two pollutant toxicity ranking methods, removing pollutants with the top ranks based on a sequence in priority, and listing the top five kinds of pollutants as key toxication substances. According to the method established by the application, the toxication levels of the pollutants are ranked and thus the key toxication substances in coal chemical wastewater complicated system can be identified effectively, thereby laying the foundation for the stable running of the biochemical device of the coal chemical wastewater.

Description

technical field [0001] The invention belongs to the technical field of coal chemical wastewater, and in particular relates to a method for identifying key toxicants in coal chemical wastewater. Background technique [0002] The composition of coal chemical wastewater is complex, and there are hundreds of pollutants that can be detected, and the overall pollution load is very high. Pollutants contain a variety of phenols, aromatic hydrocarbons, and polycyclic heterocyclic compounds, which are highly toxic. After the previous pretreatment such as phenol ammonia recovery, the content of highly toxic pollutants in the wastewater is still high, and the biodegradability is still poor. When the biochemical device is running stably, the effluent COD is generally higher than 300mg / L. What's more serious is that when the routine control indicators such as COD and total phenol content of the biochemical influent do not show obvious abnormalities, the overall biological toxicity of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 肖盟盖恒军马红蕾庞欣然冯清敏
Owner QINGDAO UNIV OF SCI & TECH
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