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Method of thick mash alcohol fermentation by using fresh cassava

A technology of alcohol fermentation and fresh cassava, applied in fermentation, biofuel, etc., can solve the problems of low mass transfer efficiency, high viscosity of feed liquid, and poor fluidity, so as to improve mass transfer efficiency, reduce labor productivity, and have good fluidity Effect

Active Publication Date: 2013-01-09
GUANGXI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for fermenting thick mash alcohol with fresh cassava as raw material, which effectively improves the initial total sugar concentration in the cassava thick mash alcohol fermentation, and solves the problem of feed liquid in the thick mash fermentation process. Problems such as high viscosity, poor fluidity and low mass transfer efficiency

Method used

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  • Method of thick mash alcohol fermentation by using fresh cassava

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Embodiment

[0021] A kind of method utilizing fresh cassava thick mash alcoholic fermentation, comprises the following steps:

[0022] (1) Grinding: fresh cassava and slag-washed low-residual sugar water are mixed in a ratio of 1:1 and crushed so that the particle size is less than 1.5 mm; the dry matter content in the slurry is 15% to 17%.

[0023] (2) Sizing: Use an acid-base solution to adjust the pH of the slurry to 5.8-6.5, and add 12u of high-temperature-resistant α-amylase per gram of absolute-dry tapioca starch fed during the first crushing.

[0024] (3) Liquefaction and filtration: heat the slurry to 90°C to 95°C, keep it warm for 60min to 120min, and filter the filtrate with 80 mesh nylon filter cloth to obtain the filtrate, which is the liquefaction liquid; the dry matter content of the filtrate is above 15%; To recover residual sugar from the filter residue, add 85°C hot water to the filter residue according to the ratio of filter residue:water = 1:10, stir well and mix the sl...

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Abstract

The invention relates to a method of thick mash alcohol fermentation by using fresh cassava, comprising the following steps: preparing fresh cassava which is pulverized for the first time into pulp; heating, liquefying and filtering; washing with hot water and filtering slag out; recycling residual sugar in a filtering slag, wherein filtrate obtained after filtering can be used for the first pulverization of the fresh cassava, the first filtrate can be used as pulverizing liquid in second pulverization of the fresh cassava. Slurry obtained after pulverization is used as row material of the thick mash alcohol fermentation, and the initial total sugar concentration reaches to 23.5-24.5 (g / 100mL); and after the procedures of liquefying, sterilization, saccharifying, fermentation, and the like, the obtained final fermentation mature raw spirit part reaches to more than 13.0(v / v). The invention completely uses the fresh cassava as raw material to ferment thick mash to produce alcohol, thereby effectively improving the initial total sugar concentration in the process of the thick mash alcohol fermentation by using the cassava, and solving the problems of big slurry viscosity, bad flowability, low mass transfer efficiency, and the like in the fermentation process. The invention has the advantages of simple process, energy saving, low cost, low waste material production, and the like,and is used for developing circular economy.

Description

【Technical field】 [0001] The invention relates to a process for producing ethanol by fermenting thick mash with fresh cassava as raw material. 【Background technique】 [0002] Guangxi is the main production area of ​​alcohol production in my country, and cassava is one of the main raw materials for alcohol production. The cost of using cassava chips as raw material to produce alcohol is higher, generally all is to use fresh cassava as raw material to produce alcohol, the main problem of existence is that the wine portion of the fermented mature mash of general alcohol production enterprise is about 9.5% (v / v), its Equipment utilization rate, labor productivity and energy utilization rate are low, and production cost is high. The improved method is to use concentrated mash alcohol fermentation, which is characterized by high equipment utilization, low distillation energy consumption, low production cost and easy handling of distiller's grains. The premise of using fresh cass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/10
Inventor 容元平伍时华李克林廖兰易弋黄翠姬
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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