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Method for processing production waste liquid of ketene dimer by composite bacteria

A technology of diketene and compound bacteria, which is applied in anaerobic digestion treatment, natural water treatment, chemical instruments and methods, etc., can solve the problems of secondary pollution, unpleasant smell, and excessive solid waste, save energy and overcome odor. unpleasant effect

Inactive Publication Date: 2009-01-07
JIANGSU TIANCHENG BIOCHEM PROD
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Problems solved by technology

Because the pH requirement of the iron bed pretreatment is about 2, a large amount of sulfuric acid needs to be added first to make the pH value reach 2, and the pH needs to reach about 8 when entering the UASB, so a large amount of lime needs to be added to adjust the pH value, and a large amount of lime and sulfuric acid are generated. Calcium sulfate has a lot of solid waste, which needs to be filtered and separated before entering the UASB, and the treatment cost is high
And the generated CaSO 4 , smell bad, produce secondary pollution

Method used

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  • Method for processing production waste liquid of ketene dimer by composite bacteria

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specific Embodiment approach

[0010] Input the diketene production waste liquid into the waste liquid adjustment pool A, adjust the pH to 7-8 with a small amount of lime milk and water (UASB reuse water and domestic water), the COD is 12000-15000mg / L, and use the pump to pump the pH-adjusted The waste liquid is sent to the UASB anaerobic reaction tank B, and treated with composite bacteria, the effluent COD is 600mg / L, and more than 96% are removed. The composite bacteria treatment is the application of conventional activated sludge from domestic sewage treatment plants and lemon Special activated sludge for acid plant sewage treatment with methane bacteria. The waste gas is discharged from the top of the UASB pool and enters the waste gas collector C, and the generated secondary waste gas (mainly containing combustible gases such as methane) is sent to the heating furnace D as fuel. A small amount of residue in the waste liquid adjustment tank is cleaned regularly. Part of the waste water is reused as wa...

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Abstract

The invention discloses a method for processing ketene dimmer industrial waste liquid by applying composite bacteria. The method comprises the following steps: adjusting the pH value of the ketene dimmer industrial waste liquid to 7 to 8 in a waste liquid adjusting tank by using lime milk; introducing the ketene dimmer industrial waste liquid into a UASB anaerobic reaction tank; processing the ketene dimmer industrial waste liquid by applying sludge in a domestic sewage treatment plant and methane bacteria used for sewage treatment in a citric acid plant, so that 96 percent of chemical oxygen demand (COD) in the ketene dimmer industrial waste liquid is eliminated; discharging exhaust gas from the top of the UASB tank; and enabling the exhaust gas to enter an exhaust gas collection device to be incinerated and discharged without pollution. A small quantity of residues in the waste liquid adjusting tank is cleaned periodically.

Description

technical field [0001] The invention relates to a method for treating diketene production waste liquid by using compound strains, and belongs to the technical field of chemical industry. Background technique [0002] After the dimerization reaction of ketene, diketene is produced. After the reaction, the waste liquid contains organic components such as acetic acid, acetone, and butyl acetate. If it is directly discharged, it will cause serious pollution to the environment. In the prior art, the waste liquid after the production of diketene is first pretreated with iron, and then treated by anaerobic reaction and other processes to meet the standard discharge. Because the pH requirement of the iron bed pretreatment is about 2, a large amount of sulfuric acid needs to be added first to make the pH value reach 2, and the pH needs to reach about 8 when entering the UASB, so a large amount of lime needs to be added to adjust the pH value, and a large amount of lime and sulfuric a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/28C02F103/36
CPCY02E50/343Y02E50/30
Inventor 陈正荣陈敏陈正崔惠忠
Owner JIANGSU TIANCHENG BIOCHEM PROD
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