Alcohol type fermentation wastewater purification treatment and circulation method

A technology for fermentation wastewater, purification and treatment, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of discharge wastewater pollution, long fermentation cycle, low treatment efficiency, etc., to reduce costs, sugar The effect of small loss of similar substances and avoiding large emissions

Inactive Publication Date: 2018-11-16
盱眙凹土能源环保材料研发中心
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the large amount of alcohol fermentation wastewater and the serious pollution of discharged wastewater have restricted the sustainable development of alcohol fuel production enterprises, especially in areas with abundant straw resources but very tight water resources in China.
The use of anaerobic activated sludge can achieve a certain treatment effect on alcohol fermentation wastewater, but this process requires a complex internal circulation anaerobic reactor, equipment investment and production costs are high, and activated sludge requires several months of processing Domestication is the only way to achieve the treatment effect, so the treatment efficiency is low
Treatment of alcohol fermentation wastewater by yeast method can reduce COD in wastewater and obtain microbial oil with certain economic value, but it has long fermentation cycle, complicated process, large investment, and oil fermentation wastewater cannot be reused many times, so it is difficult to realize industrial application
The fixed bed of ultra-high cross-linked adsorption resin can effectively remove inhibitors such as organic acids and pigments in alcohol fermentation wastewater, but the synthesis cost of ultra-high cross-linked adsorption resin is relatively high
As a classic adsorbent, activated carbon is very effective in removing dissolved organic matter in water, but it also adsorbs residual fermentable sugars in alcoholic fermentation wastewater, and its cost is high, and its practical application range is becoming smaller

Method used

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  • Alcohol type fermentation wastewater purification treatment and circulation method
  • Alcohol type fermentation wastewater purification treatment and circulation method
  • Alcohol type fermentation wastewater purification treatment and circulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Preparation of organically modified attapulgite clay

[0017] ①Crush the attapulgite clay raw ore through a 100-mesh sieve, take 200g and pour it into 2000g of tap water, add 8g of sodium hexametaphosphate, high-shear for 30min, remove impurities by centrifugation, and dry in an oven at 85°C to obtain purified soil; pulverize the purified soil Pass through a 200-mesh sieve, pour 100 g into 500 g of dilute sulfuric acid solution (mass fraction 12%), stir and react in a water bath at 85°C for 2 hours, wash with tap water until neutral, and dry in an oven at 85°C to obtain acidified soil; crush the acidified soil 200 mesh sieve, pour 80g into 400g tap water, stir well in 85°C water bath, add 8g of organic modifier γ-propyltrimethoxysilane, stir in 85°C water bath for 3h, wash with tap water, bake in 85°C oven Dry to obtain organic modified soil A;

[0018] ②The method is the same as ①, except that the organic modifier is octadecyltrimethylammonium chloride, ...

Embodiment 2

[0027] Example 2: First use a centrifuge to remove the solid impurities in the alcohol fermentation wastewater, then use quicklime to adjust the pH value of the alcohol fermentation wastewater after impurity removal to 4.5, and filter for solid-liquid separation after settling; Add 50g of fermentation wastewater into a 150ml Erlenmeyer flask, add 1.0g of organic modified soil A to purify it, absorb it in a shaking table at normal temperature and pressure for 4.0h, and separate solid and liquid after adsorption.

[0028] The absorbance was measured with a 752 ultraviolet-visible spectrophotometer (test wavelength 540nm), and the decolorization rate was converted to 29.03%. The content of sugar and organic acid was detected by high performance liquid chromatography. The loss rate of total sugar was 7.17%, and the removal rate of total acid was 14.31%, of which the removal rate of butyric acid was 5.31%.

Embodiment 3

[0029] Example 3: First use a centrifuge to remove the solid impurities in the alcohol fermentation wastewater, then use quicklime to adjust the pH value of the alcohol fermentation wastewater after impurity removal to 5.5, and filter for solid-liquid separation after settling; Add 50g of fermentation waste water into a 150ml Erlenmeyer flask, add 1.75g ​​of organic modified soil C to purify it, absorb it in a shaking table at normal temperature and pressure for 2.0h, and separate solid and liquid after adsorption is completed.

[0030] The absorbance was measured with a 752 ultraviolet-visible spectrophotometer (test wavelength 540nm), and the decolorization rate was converted to 60.21%. The content of sugar and organic acid was detected by high performance liquid chromatography. The loss rate of total sugar was 7.19%, and the removal rate of total acid was 7.19%. 15.77%, of which the removal rate of butyric acid was 6.7%.

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Abstract

The invention relates to an alcohol type fermentation wastewater purification treatment and circulation method which comprises the following steps: removing solid impurities in alcohol type fermentation wastewater by using a centrifuge; further adjusting the pH value of the alcohol type fermentation wastewater after decontamination to 4.5-8.5 by using quick lime, leaving to stand and settle down,filtering, and carrying out solid-liquid separation; carrying out purification treatment on the settled alcohol type fermentation wastewater by using organic modified attapulgite clay which accounts for 1.0-5.0% of the mass of the alcohol type fermentation wastewater, adsorbing for 0.5-4.0 hours in a shaking bed at a normal temperature at normal pressure, and carrying out solid-liquid separation after adsorption is completed; feeding back the alcohol type fermentation wastewater after adsorption to a fermentation process, thereby achieving circulation. By adopting the method, the content of acid fermentation inhibitors is greatly reduced, the fermentation wastewater can be recycled for further fermentation, emission of wastewater in an alcohol production process can be avoided, meanwhile,activated carbon or a resin which is high in price is not used, and the organic modified attapulgite clay which is low in price is used instead, so that the alcohol type fermentation wastewater treatment cost can be lowered, and a novel method is provided for purification treatment and circulation of the alcohol type fermentation wastewater.

Description

technical field [0001] The invention relates to a treatment method for alcohol fermentation wastewater, in particular to a purification treatment and recycling method for alcohol fermentation wastewater. Background technique [0002] In recent years, with the depletion of petroleum resources, the sharp fluctuation of international petroleum prices, and the consensus based on non-renewability, the production of liquid alcohol fuels such as ethanol and butanol by microbial fermentation has attracted great attention from academic and industrial circles at home and abroad. Although the production of alcohol fuels by microbial fermentation is a green conversion process based on microorganisms, a large amount of waste water will be produced while obtaining useful alcohol fuels. COD is basically above 5000mg / L, so subsequent wastewater treatment is required to meet the national discharge standards. [0003] At present, the large amount of alcohol fermentation wastewater and the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01J20/12B01J20/30B01J20/28C02F101/34
CPCB01J20/12B01J20/28061B01J20/28073C02F1/001C02F1/281C02F1/38C02F1/66C02F9/00C02F2001/007C02F2101/34C02F2301/08
Inventor 陈新德彭芬郭海军熊莲张海荣王璨
Owner 盱眙凹土能源环保材料研发中心
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