COD remover

Abstract

The invention discloses a COD remover. Ferrate is taken as a main agent and is compounded with an organic flocculant and a metal salt as auxiliary materials, the coagulation time is short, the COD remover is suitable for high-salt high-COD organic wastewater treatment of various processes, the treatment efficiency is high, the comprehensive cost is low, and the removal rate of COD is 97% or above.

Description

Technical field

[0001] The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a COD remover. Background technique

[0002] Since the 1990s, with the rapid development of my country's textile industry, the printing and dyeing industry has expanded rapidly, and the production and use of dyes have increased. As a result, a large amount of dye wastewater with high COD, high chroma, high toxicity, high salinity, and low B / C is produced. According to statistics, the total amount of dye wastewater produced by the printing and dyeing industry in 2009 has reached 2.43 billion tons, accounting for more than 80 shares of the total discharge of wastewater from the textile industry. This kind of dye wastewater has the characteristics of "four highs and one low" and is related to the types of dyes used. At the same time, in the production of dyes, the enrichment of salts in the discharged wastewater is mainly caused by the production process...

Examples

Embodiment 1

[0022] A COD remover, the mass parts of each component are: 35 parts of ferrate, 0.1 part of magnesium chloride, 3 parts of aluminum nitrate, 12 parts of polydiallyldimethylammonium chloride, 3 parts of sodium sulfite, 3 parts of sodium nitrate, 1 part of sodium metabisulfite, 12 parts of calcium oxide, 22 parts of activated carbon, the above powder components are uniformly mixed to form a mixture.

[0023] The COD removal method using the above-mentioned composite COD remover is to add the high-salt and high-COD organic wastewater (inorganic salt content 21wt%, COD: 20000mg / L) and the composite COD remover at a ratio of 1:0.003 into the treatment container, Stir evenly at room temperature for 3 minutes and let it stand for 15 minutes, which can make the COD removal rate of high COD wastewater reach 97.6%.

Embodiment 2

[0025] A COD remover, the mass parts of its components are: 55 parts of ferrate, 0.1 parts of magnesium chloride, 12 parts of aluminum sulfate, 11 parts of polydiallyldimethylammonium chloride, 0.1 parts of sodium sulfite, 2 parts of sodium nitrate, 2.5 parts of sodium metabisulfite, 23 parts of calcium oxide, 12 parts of activated carbon, the above powder components are uniformly mixed to form a mixture.

[0026] The COD removal method using the above-mentioned composite COD remover is to add high-salt and high-COD organic wastewater (inorganic salt content 18wt%, COD: 50000mg / L) and the composite COD remover at a ratio of 1:0.008 into the treatment container, Stir uniformly for 3 minutes at room temperature, and let it stand for 15 minutes, which can make the COD removal rate of high COD wastewater reach 98.3%.

Embodiment 3

[0028] A COD remover, the mass parts of its components are: 40 parts of ferrate, 0.2 parts of magnesium chloride, 1 part of ferric chloride, 3 parts of polydiallyldimethylammonium chloride, 6.5 parts of sodium sulfite, 2 parts of sodium nitrite, 1.5 parts of sodium metabisulfite, 25 parts of calcium oxide, 105 parts of molecular sieve, the above powder components are uniformly mixed into a mixture.

[0029] The COD removal method using the above composite COD remover is to add the high-salt and high-COD organic wastewater (inorganic salt content 10wt%, COD: 50000mg / L) and the composite COD remover at a ratio of 1:0.005 into the treatment container, Stir evenly at room temperature for 3 minutes and let it stand for 15 minutes, which can make the COD removal rate of high-COD wastewater reach 97.5%.

Technical field

[0001] The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a COD remover. Background technique

[0002] Since the 1990s, with the rapid development of my country's textile industry, the printing and dyeing industry has expanded rapidly, and the production and use of dyes have increased. As a result, a large amount of dye wastewater with high COD, high chroma, high toxicity, high salinity, and low B / C is produced. According to statistics, the total amount of dye wastewater produced by the printing and dyeing industry in 2009 has reached 2.43 billion tons, accounting for more than 80 shares of the total discharge of wastewater from the textile industry. This kind of dye wastewater has the characteristics of "four highs and one low" and is related to the types of dyes used. At the same time, in the production of dyes, the enrichment of salts in the discharged wastewater is mainly caused by the production process...

Examples

Embodiment 1

[0022] A COD remover, the mass parts of each component are: 35 parts of ferrate, 0.1 part of magnesium chloride, 3 parts of aluminum nitrate, 12 parts of polydiallyldimethylammonium chloride, 3 parts of sodium sulfite, 3 parts of sodium nitrate, 1 part of sodium metabisulfite, 12 parts of calcium oxide, 22 parts of activated carbon, the above powder components are uniformly mixed to form a mixture.

[0023] The COD removal method using the above-mentioned composite COD remover is to add the high-salt and high-COD organic wastewater (inorganic salt content 21wt%, COD: 20000mg / L) and the composite COD remover at a ratio of 1:0.003 into the treatment container, Stir evenly at room temperature for 3 minutes and let it stand for 15 minutes, which can make the COD removal rate of high COD wastewater reach 97.6%.

Embodiment 2

[0025] A COD remover, the mass parts of its components are: 55 parts of ferrate, 0.1 parts of magnesium chloride, 12 parts of aluminum sulfate, 11 parts of polydiallyldimethylammonium chloride, 0.1 parts of sodium sulfite, 2 parts of sodium nitrate, 2.5 parts of sodium metabisulfite, 23 parts of calcium oxide, 12 parts of activated carbon, the above powder components are uniformly mixed to form a mixture.

[0026] The COD removal method using the above-mentioned composite COD remover is to add high-salt and high-COD organic wastewater (inorganic salt content 18wt%, COD: 50000mg / L) and the composite COD remover at a ratio of 1:0.008 into the treatment container, Stir uniformly for 3 minutes at room temperature, and let it stand for 15 minutes, which can make the COD removal rate of high COD wastewater reach 98.3%.

Embodiment 3

[0028] A COD remover, the mass parts of its components are: 40 parts of ferrate, 0.2 parts of magnesium chloride, 1 part of ferric chloride, 3 parts of polydiallyldimethylammonium chloride, 6.5 parts of sodium sulfite, 2 parts of sodium nitrite, 1.5 parts of sodium metabisulfite, 25 parts of calcium oxide, 105 parts of molecular sieve, the above powder components are uniformly mixed into a mixture.

[0029] The COD removal method using the above composite COD remover is to add the high-salt and high-COD organic wastewater (inorganic salt content 10wt%, COD: 50000mg / L) and the composite COD remover at a ratio of 1:0.005 into the treatment container, Stir evenly at room temperature for 3 minutes and let it stand for 15 minutes, which can make the COD removal rate of high-COD wastewater reach 97.5%.