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Pretreatment method for sugarcane juice alcoholic fermentation broth and extraction method for high value products in waste liquid

An alcohol fermentation liquid and alcohol fermentation technology, which is applied in the field of extraction of high-value products from sugarcane juice alcohol fermentation waste liquid, can solve problems such as limitations, and achieve the effects of improving efficiency, improving alcohol distillation efficiency and having strong dispersibility.

Inactive Publication Date: 2013-06-26
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, if the agricultural irrigation method is adopted, it is also limited by the soil conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Get 500ml of sugarcane juice, add 300 mesh diatomaceous earth, the addition amount is 50mg, carry out operations such as disinfection, inoculation, shake flask according to the alcohol fermentation operating procedure, finish fermentation after 50 hours of fermentation. Add 10% sodium hydroxide solution to the fermentation broth to adjust the pH value to 7.5, stir well, let stand, and separate solid and liquid to obtain sediment and clear fermentation broth. The precipitate I was recovered (0.023% by dry weight), and the clear fermentation broth was used to distill alcohol to obtain alcohol (6.64 alcohol content) and alcohol waste liquid (COD value 1.56×10 4 mg / L).

[0033] Take the above alcohol waste liquid, adjust the pH value to 8.0 with 10% sodium hydroxide solution, stir well, let it stand, and separate the solid and liquid to obtain a precipitate (dry weight of 0.008%) and alcohol waste liquid clear liquid (COD value of 0.56 ×10 4 mg / L). Precipitate II is re...

Embodiment 2

[0035] Get 500ml of sugarcane juice, add 300 mesh diatomaceous earth, the addition amount is 80mg, carry out operations such as disinfection, inoculation, shake flask according to the alcoholic fermentation operating procedure, finish fermentation after 50 hours of fermentation. Add 10Be lime emulsion to the fermentation broth to adjust the pH value to 7.0, stir well, let stand, and separate solid and liquid to obtain sediment and clear fermentation broth. The precipitate I was recovered (0.024% by dry weight), and the clear fermentation broth was used to distill alcohol to obtain alcohol (6.75 alcohol content) and alcohol waste liquid (COD value 1.45×10 4 mg / L).

[0036] Take the above alcohol waste liquid, adjust the pH value to 8.0 with 10Be lime emulsion, stir well, let stand, and separate the solid and liquid to obtain the precipitate (dry weight is 0.007%) and alcohol waste liquid clear liquid (COD value is 0.49×10 4 mg / L). The precipitate II is recovered, the alcoho...

Embodiment 3

[0038]Get 500ml of sugarcane juice, add 400 mesh high-purity quartz sand, the addition amount is 200mg, carry out operations such as disinfection, inoculation, shake flask according to the alcoholic fermentation operating procedure, finish fermentation after 50 hours of fermentation. Add 10% sodium hydroxide solution to the fermentation broth to adjust the pH value to 7.5, stir well, let stand, and separate solid and liquid to obtain sediment and clear fermentation broth. The precipitate I was recovered (0.026% by dry weight), and the clear fermentation broth was used to distill alcohol to obtain alcohol (6.76 alcohol content) and alcohol waste liquid (COD value 1.78×10 4 mg / L).

[0039] Take the above alcohol waste liquid, adjust the pH value to 8.0 with 10% sodium hydroxide solution, stir well, let it stand, and separate the solid and liquid to obtain a precipitate (dry weight is 0.009%) and alcohol waste liquid clear liquid (COD value is 0.59×10 4 mg / L). The precipitat...

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Abstract

The invention discloses a pretreatment method for sugarcane juice alcoholic fermentation broth and an extraction method for high value products in waste liquid. The pretreatment method comprises the following steps: (1) adding ultrafine particles during sugarcane juice alcoholic fermentation, after fermentation, adjusting the pH value of obtained fermentation broth, carrying out solid-liquid separation, recovering the solid, and using the liquid for extraction of alcohol; (2) adjusting the pH value of obtained alcohol waste liquid after extraction of alcohol, carrying out solid-liquid separation, recovering the solid, using the liquid for further extraction of high value pigments. Obtained waste liquid after extraction of pigments is colorless or in light color and can be used as osmosis water for extraction of sucrose content by squeezing sugarcanes or can be discharged after further simple biochemical treatment. The methods provided in the invention enable alcoholic fermentation efficiency and the effect of clarification to be improved, difficulty of aftertreatment of alcohol waste water to be reduced and a great amount of products with high added values to be recovered, and is of positive significance to improvement of integral economic benefits of sugarcane-energized alcohol and environmental protection.

Description

technical field [0001] The invention relates to a pretreatment method of sugarcane juice alcoholic fermentation liquid and a method for extracting high-value products of sugarcane juice alcoholic fermentation waste liquid. Background technique [0002] Sugarcane is one of the most important raw materials for the development of energy alcohol. In the production of ethanol from sugarcane, the waste liquid left after the sugarcane juice is fermented to extract ethanol not only contains some yeast remains and some soluble nutrients left in the fermentation process, but also retains various original substances in the cane juice. A variety of inorganic substances, organic substances and a large number of colored substances. In the previous methods of treating molasses alcohol waste liquid, people generally only pay attention to the basic components and characteristics of the waste liquid left after ethanol extraction, while ignoring the source of these basic components and the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06C09B61/00
CPCY02E50/17Y02E50/10
Inventor 黄玉南梁达奉朱明军蚁细苗梁世中谭文兴钟映萍张佳泳曾练强马年方张远平梁磊李晶博
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)