Harmless dimethylacetamide wastewater treatment method

A dimethylacetamide, harmless treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as reducing environmental risks and refractory degradation, Achieve the effects of less engineering investment, lower processing costs, and easy promotion and application

Inactive Publication Date: 2013-10-23
苏州有色金属研究院有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for harmless treatment of dimethylacetamide wastewater to solve the problem of refracto

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  • Harmless dimethylacetamide wastewater treatment method
  • Harmless dimethylacetamide wastewater treatment method

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Embodiment Construction

[0027] The harmless treatment method of dimethylacetamide wastewater, such as figure 1 As shown, the specific process steps are:

[0028] (1) Adjust the pH value of the wastewater to 2.0-3.5 by adding industrial sulfuric acid;

[0029] (2) Pass the wastewater with a pH value of 2.5 to 3.0 through the iron-carbon reactor at a flow rate of 0.8 to 1.2 m / h for micro-electrolysis reaction, and at the same time aerate the iron-carbon reactor with a gas-water volume ratio of 5:1 ~8:1; wherein, the iron in the iron-carbon reactor is industrial waste iron filings, and the industrial waste iron filings are first soaked in alkaline solution, then rinsed repeatedly with clear water, and then soaked in acid solution to remove dust, Oil stains and rust stains can be washed repeatedly with clean water at the end; the iron-carbon volume ratio in the iron-carbon reactor is 1:1~1:1.2, wherein the particle size of iron particles is <40 mesh, and the particle size of carbon particles is <100 mes...

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Abstract

The invention relates to a harmless dimethylacetamide wastewater treatment method which comprises the following steps of: (1) regulating the pH of wastewater in a regulating reservoir; (2) performing pretreatment in an iron carbon-Fenton oxidation pond; (3) performing flocculating sedimentation treatment; (4) adding a carbon source to perform hydrolytic acidification treatment; (5) performing anaerobic biochemical treatment in a primary upflow anaerobic sludge blanket (UASB) reactor; (6) performing anaerobic treatment in a secondary UASB (Upflow Anaerobic Sludge) reactor; (7) treating in an aerobic pond; (8) performing mud-water treatment in a secondary sedimentation tank to drain water. An aerated micro electrolysis method, a Fenton oxidation method and a biological method are combined; moreover, a good wastewater treatment effect is kept, the treatment cost is reduced, and the harmless dimethylacetamide wastewater treatment method has the obvious characteristics of high organic matter removal efficiency, stable effluent quality, low engineering investment, low energy consumption and the like, and is easy to popularize and apply.

Description

technical field [0001] The invention relates to a method for harmless treatment of dimethylacetamide wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Dimethylacetamide (DMAc), a colorless transparent liquid, is flammable and can be freely mixed with organic solvents such as water, alcohol, ether, ester, benzene, chloroform and aromatic compounds. Dimethylacetamide is a strong polar non-protonated solvent, which is widely used in textile, cosmetics, membrane material preparation and other industries. According to statistics, the annual consumption of dimethylacetamide in my country reaches tens of thousands of tons, but there is still no suitable treatment method for the production wastewater containing dimethylacetamide. If the conventional biological treatment process is adopted, due to the toxic effect of dimethylacetamide, it will inhibit the microbial activity in the treatment project, resulting in the disintegration an...

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Application Information

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IPC IPC(8): C02F9/14C02F101/38
Inventor 柴续斌吴子平黄游黄臣勇李贵军赵解杨
Owner 苏州有色金属研究院有限公司
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