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Preprocessing method of hexadecyl trimethyl ammonium bromide for molasses alcohol waste water

A technology of cetyltrimethylammonium bromide and molasses alcohol wastewater, which is applied in the direction of food industry wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve chromaticity reduction, load reduction, and adaptability strong effect

Inactive Publication Date: 2011-09-21
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the pigment is generally a macromolecular organic compound, which is in a colloidal state in the solution, and is difficult to be degraded by microorganisms. It is resistant to temperature and light, and its color value does not decrease after prolonged storage. It is an important component of waste liquid COD, so there is no such thing as yet Efficient and low-cost processing method

Method used

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  • Preprocessing method of hexadecyl trimethyl ammonium bromide for molasses alcohol waste water
  • Preprocessing method of hexadecyl trimethyl ammonium bromide for molasses alcohol waste water

Examples

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Effect test

Embodiment 1

[0013] Taking the pretreatment of 1000mL molasses alcohol wastewater as an example, the raw materials used and the pretreatment method are as follows:

[0014] Get molasses alcohol wastewater 1000mL, add mass fraction and be 50mL of cetyltrimethylammonium bromide aqueous solution of 20%, namely molasses alcohol wastewater and massfraction are the cetyltrimethylammonium bromide aqueous solution volume ratio of 20% 1:0.05, stir, mix evenly, let stand for 1 to 5 minutes, centrifuge at 4000 rpm for 20 minutes in a high-speed centrifuge, precipitate, separate the precipitate, and the supernatant enters the biochemical system for processing.

Embodiment 2

[0016] Taking the pretreatment of 1000mL molasses alcohol wastewater as an example, the raw materials used and the pretreatment method are as follows:

[0017] Take 1000mL of molasses alcohol wastewater, add 15mL of cetyltrimethylammonium bromide aqueous solution with a mass fraction of 20%, that is, the volume of molasses alcohol wastewater and 20% cetyltrimethylammonium bromide aqueous solution The ratio is 1:0.015, stirring, mixing evenly, standing still for 1 to 5 minutes, centrifuging at 4000 rpm for 20 minutes in a high-speed centrifuge, settling, separating the precipitate, and the supernatant enters the biochemical system for processing.

Embodiment 3

[0019] Taking the pretreatment of 1000mL molasses alcohol wastewater as an example, the raw materials used and the pretreatment method are as follows:

[0020] Get 1000mL of molasses alcohol wastewater, add 60mL of cetyltrimethylammonium bromide aqueous solution with a mass fraction of 20%, that is, the volume ratio of molasses alcohol wastewater to 20% cetyltrimethylammonium bromide aqueous solution 1:0.06, stir, mix evenly, let stand for 1 to 5 minutes, centrifuge at 4000 rpm for 20 minutes in a high-speed centrifuge, precipitate, separate the precipitate, and the supernatant enters the biochemical system for processing.

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Abstract

The present invention relates to a preprocessing method of hexadecyl trimethyl ammonium bromide for molasses alcohol waste water, which comprises the following steps: the molasses alcohol waste water is taken to be put into a beaker; hexadecyl trimethyl ammonium bromide solution of which the mass fraction is 20% is added; the volume ratio of the molasses alcohol waste water to the hexadecyl trimethyl ammonium bromide solution of which the mass fraction is 20% is 1 : 0.015 to 0.06; the molasses alcohol waste water and the hexadecyl trimethyl ammonium bromide solution are stirred to be mixed evenly, then, are placed silently for one to five minutes, and are centrifuged by a high-speed centrifuge with 4000 turns / min for 20 minutes to be precipitated; precipitate are separated; and supernatant fluid flows into a biochemical system to be processed. The present invention has the advantages of running at normal temperature and pressure, short processing time, strong application, without pH value adjustment and the like; after the molasses alcohol waste water is processed, the chemical oxygen consuming content and the chroma are obviously reduced, which reduces loads for the rear-continuous processing; and meanwhile, the molasses alcohol waste water is precipitated to obtain black caramel pigment which can be recovered, and the black caramel pigment can be used as pigment in food processing industry.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a pretreatment method for molasses alcohol wastewater. Background technique [0002] The production of alcohol from molasses produces a large amount of waste liquid. For every ton of alcohol produced, about 15 tons of molasses alcohol wastewater is discharged. The molasses alcohol wastewater is a kind of high-concentration, brown acid wastewater with a chemical oxygen demand (COD) of 150,000mg / L , Biological Oxygen Demand (BOD) is 60000mg / L, chromaticity is 7000 times high, the melanoid and brown pigment contained in it are difficult to be degraded by microorganisms, temperature resistance, light resistance, and the color value is not bad after prolonged storage reduce. Therefore, decolorization is a difficult point in processing. The refractory molasses organic wastewater is the "bottleneck" that restricts the sustainable development of sugar factories. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/38C02F103/32
Inventor 沈壮志
Owner SHAANXI NORMAL UNIV
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