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Method for processing and recycling waste water containing phenolic compounds

A technology of phenolic compounds and treatment methods, which is applied in the field of treatment of industrial wastewater containing phenolic compounds, and can solve problems such as difficulty in application

Inactive Publication Date: 2012-04-18
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method described in the above-mentioned literature is suitable for treating high-concentration phenol-containing coal gasification wastewater, and its initial phenol concentration (total phenol content) reaches 3,000 to 10,000 mg / L (ie 3,000 to 10,000 ppm). The total phenolic content in the discharged water reaches 350ppm or even higher. It can be seen that for industrial wastewater with lower total phenolic content or pretreated phenolic wastewater, the above method is difficult to apply

Method used

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  • Method for processing and recycling waste water containing phenolic compounds
  • Method for processing and recycling waste water containing phenolic compounds
  • Method for processing and recycling waste water containing phenolic compounds

Examples

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Effect test

Embodiment 1

[0125] Embodiment 1: The present invention reclaims the method for phenolic compound and / or contains phenol from phenol-containing wastewater Application example of waste water treatment method

[0126] 1. Process:

[0127] (1) In the material tank, add phenolic wastewater to be treated [source: coal gasification wastewater, collected on December 3, 2009; volume: 10L; total phenol content: 88ppm]; add flocculant [polyaluminium, 5% aqueous solution (add 5g flocculant to 100ml water), dosage: 8ml], stir evenly, carry out flocculation, sedimentation for 24 hours;

[0128] (2) by pouring first, and then filtering, the material of step (1) is subjected to solid-liquid separation through flocculation and sedimentation to obtain a solid material part and a liquid material part; the above-mentioned solid material part is dried, extracted with ethanol, and the residue It can be used as building materials or other purposes, and the solvent is recovered from the extract to obtain 15...

Embodiment 2

[0139] Embodiment 2: the present invention reclaims the method for phenolic compound and / or contains phenol from phenol-containing wastewater Application example of waste water treatment method

[0140] 1. Process:

[0141] (1) In the material tank, add phenol-containing wastewater to be treated [source: coal gasification wastewater, collected on December 4, 2009; volume: 10L; total phenol content: 75ppm]; then add flocculant [polyaluminum , 5% aqueous solution (add 5g flocculant to 100ml water), dosage: 7.5mL], stir evenly, carry out flocculation, settling for 24 hours, stir slightly occasionally during;

[0142] (2) By first pouring and then filtering, the material of step (1) through flocculation and sedimentation is subjected to solid-liquid separation to obtain a solid material part and a liquid material part; the above-mentioned solid material part is dried, extracted with ethanol, and discarded Residue, the solvent was recovered from the extract to obtain 1.0 g of ...

Embodiment 3

[0151] Embodiment 3: the present invention reclaims the method for phenolic compound from phenol-containing wastewater and / or contains phenol Application example of waste water treatment method

[0152] 1. Process:

[0153] (1) In the material tank, add the phenolic wastewater to be treated [source: coal gasification wastewater, coal gasification wastewater approved on September 28, 2009; volume: 10L; total phenol content: 90ppm]; add flocculant [Polyaluminium, 5% aqueous solution (add 5g flocculant to 100ml water), dosage: 62mL], stir evenly, carry out flocculation and sedimentation for 24 hours, occasionally stirring slightly during the period;

[0154] (2) By first pouring and then filtering, the material of step (1) through flocculation and sedimentation is subjected to solid-liquid separation to obtain a solid material part and a liquid material part; the above-mentioned solid material part is dried, extracted with ethanol, and discarded Residue, the solvent was reco...

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Abstract

The invention relates to a method for processing and recycling waste water containing phenolic compounds, in particular to a method for recycling phenolic compounds from the phenolic waste water, comprising the following steps: (a) adding a flocculating agent in the phenolic waste water to be processed for flocculation; (b) carrying out solid-liquid separation on the material of the step (a); (c) determining the pH value of the liquid material obtained by the step (b), and adjusting the pH value to acidity; (d) letting the material obtained by the step (c) pass through a resin column, and measuring the total phenol content in water; (e) eluting the resin column which absorbs the phenolic compounds with a small molecular alcohol and / or ketone solvent; and (f) recovering the solvent from the eluate, and drying to obtain a product which is rich in phenolic compounds. Correspondingly, the invention further provides a method for processing the waste water containing phenolic compounds and the obtained phenolic product. According to the invention, the method disclosed herein is suitable for processing the waste water with low phenol content, and is environmental friendly; by using the raw materials which has the advantages of low pollution, or low price, or easy processing, and or recycling property, the method has the advantages of low cost and low energy consumption.

Description

technical field [0001] The invention generally relates to waste water treatment and resource recovery methods, in particular to a treatment method and resource recovery methods for industrial waste water containing phenolic compounds. Background technique [0002] Wastewater containing phenolic compounds, especially industrial wastewater containing phenolic compounds, such as coal gasification, petroleum refining, coal coking, synthetic ammonia, phenol synthesis, and chemical product synthesis with phenol as raw material. Wastewater, which contains a large amount of toxic phenolic compounds, will cause serious environmental pollution if discharged directly into the environment. Today, as environmental pollution has increasingly become a major issue in global political and economic life, how to rationally and effectively use existing resources to create wealth for society while minimizing environmental pollution is a topic of concern in many fields. [0003] Wastewater conta...

Claims

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Application Information

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IPC IPC(8): C02F9/04C07C37/68C07C39/04C07C39/07
Inventor 甘中学刘振学李金来宋庆峰谷俊杰
Owner ENN SCI & TECH DEV
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