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Method for purifying high concentrated organic wastewater by electrically assisted iron-carbon bed

An organic waste water, high-concentration technology, applied in the field of water treatment, can solve problems such as high cost and complex process, and achieve the effects of improving hardening, increasing biochemical value, and reducing losses

Active Publication Date: 2013-11-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment of high-concentration organic wastewater often requires two or more than three methods for simultaneous treatment, the process is more complicated and the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The method for purifying high-concentration organic wastewater by this electric-assisted iron-carbon bed, the specific content is as follows:

[0024] (1) This example treats GABA wastewater, and the initial COD of organic wastewater is tested Cr The value is 38000 mg / L, the B / C value is 0.23, and the chromaticity is 240 times;

[0025] (2) Pretreatment of iron filings: Clean the iron filings with a sodium hydroxide solution with a mass percentage concentration of 6%, then rinse them with water, dry them, and sieve them to obtain iron filings with a particle size of about 15 mesh. Wash the oxides on the surface with dilute hydrochloric acid with a mass percentage concentration of 4%, and rinse with water;

[0026] (3) Wash the coke with a particle size of 2-6mm with water, dry it and reserve it to prevent the interference of other impurities;

[0027] (4) Iron filings, coke and X50 polyethylene multifaceted hollow spheres are mixed at a mass ratio of 20:...

Embodiment 2

[0032] Embodiment 2: The method for purifying high-concentration organic wastewater by the electric-assisted iron-carbon bed, the specific content is as follows:

[0033] (1) This example deals with coking wastewater, and the initial COD of organic wastewater is detected Cr The value is 23700 mg / L, the B / C value is 0.17, and the chromaticity is 150 times;

[0034] (2) Pretreatment of iron filings: Wash the iron filings with 7% sodium carbonate solution, rinse with water, dry, and sieve to obtain iron filings with a particle size of about 10 mesh for use. Wash the oxides on the surface with dilute hydrochloric acid and rinse with water;

[0035] (3) Wash the coke with a particle size of 2-6mm in water, dry it and set it aside;

[0036] (4) Iron filings, coke and X50 polyethylene multifaceted hollow spheres are mixed at a mass ratio of 30:2:7 to obtain iron-carbon fillers;

[0037] (5) Put the filler in the iron-carbon bed, check the integrity of the inlet and outlet of the i...

Embodiment 3

[0041] Example 3: The method for purifying high-concentration organic wastewater with an electric-assisted iron-carbon bed, the specific content is as follows:

[0042] (1) This example deals with dye wastewater, and the initial COD of organic wastewater is tested CrThe value is 1460mg / L, the B / C value is 0.2, and the chromaticity is 1620 times;

[0043] (2) Pretreatment of iron filings: Wash the iron filings with 8% sodium bicarbonate solution, then rinse them with water, dry them, and sieve them to obtain iron filings with a particle size of about 20 mesh. 6% dilute sulfuric acid to clean the oxides on the surface, rinse with water;

[0044] (3) Wash the coke with a particle size of 2-6mm with water, dry it and reserve it to prevent the interference of other impurities;

[0045] (4) Iron filings, coke and X50 polyethylene multifaceted hollow spheres are mixed at a mass ratio of 40: 3: 8 to obtain iron-carbon fillers;

[0046] (5) Put the filler in the iron-carbon bed, ch...

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Abstract

The invention discloses a method for purifying high concentrated organic wastewater by an electrically assisted iron-carbon bed. According to the method, high concentrated organic wastewater is treated and purified by the iron-carbon bed assisted with an electrochemical process. The method has the advantages that organic substances which are difficult to degrade in the wastewater are effectively degraded, the lowering rate of color is improved, the high concentrated organic wastewater is effectively purified at a high speed, the consumption of iron and ferrous ions is reduced, the use period of the iron-carbon bed is prolonged, the defects that the iron-carbon bed easily hardens under an acid condition, has a great number of sludge and the like are improved, and the biochemical (B / C) index of the high concentrated organic wastewater is raised.

Description

technical field [0001] The invention relates to a method for purifying high-concentration organic wastewater with an electric-assisted iron-carbon bed, and belongs to the technical field of water treatment. Background technique [0002] The iron-carbon bed treatment method is an application form of metal iron wastewater treatment technology. It uses the iron-carbon method as a pretreatment technology to treat toxic, harmful, and high-concentration COD wastewater with good results. Under acidic conditions, countless micro-current reaction pools are formed between carbon and iron. Organic matter is reduced and oxidized under the action of micro-current. 2 Colloidal flocs have a strong flocculation and adsorption capacity for organic matter. Therefore, the iron-carbon method is a comprehensive application of the reducing properties of iron, the electrochemical properties of iron-carbon and the flocculation and adsorption of iron ions, so that the iron-carbon method has a good ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 瞿广飞刘玉环曾金花宁平
Owner KUNMING UNIV OF SCI & TECH
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