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Method and equipment for continuous solid-state fermentation and gas-stripping heat-pump coupling separation of product

A technology of solid-state fermentation and fermentation products, which is applied in the field of continuous solid-state fermentation and product gas-lifting heat pump coupling separation, can solve the problems of reducing feedback inhibition of fermentation products, inability to realize continuous feeding and discharging, and high energy consumption for product separation, and achieves a solution The control of mass transfer and heat transfer, the high efficiency and unity of energy quality and quantity, and the effect of low production cost

Inactive Publication Date: 2010-01-27
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] [Purpose of the present invention] The purpose of the present invention is to provide a continuous solid-state fermentation and product online separation method and The equipment uses the screw conveyor to realize the continuous feeding and discharging of solid-state fermentation, and ensures that the system is sealed and is not easy to infect bacteria; combines solid-state fermentation with air lift to solve the problem of heat transfer and mass transfer control of solid-state fermentation, realize constant temperature fermentation, and Realize the online separation of fermentation products, reduce the feedback inhibition of fermentation products; adopt the air-lift heat pump coupling separation, take advantage of the energy-saving advantages of the heat pump, and recover the heat generated by fermentation for the air-lift separation of products, reduce system energy consumption, and at the same time use less water in the fermentation process , low production cost, no pollution, realize clean production of solid-state fermentation

Method used

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  • Method and equipment for continuous solid-state fermentation and gas-stripping heat-pump coupling separation of product
  • Method and equipment for continuous solid-state fermentation and gas-stripping heat-pump coupling separation of product

Examples

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Effect test

Embodiment 1

[0047] Use crushed sweet sorghum stalks with a water content of 80%, a total sugar content of 13% to 14%, and a reducing sugar content of 6% to 7% as raw materials, feed 120L through a screw conveyor, and inoculate Angel high active dry yeast Saccharomyces cerevisiae at the same time (inoculum size 0.5%), and add nutrients (0.5% (NH 4 ) 2 SO 4 , 0.5% CaCl 2 ), adjust the pH to be about 5.0, and use CO 2 Replace the air in the system, turn on the fan and heat pump device after the replacement, control the temperature in the fermentation tower at 35°C, the temperature of the heat pump evaporator at 5-10°C, CO 2 Flow 3.6m 3 / h, the crude ethanol was collected from the bottom of the heat pump evaporator at intervals, co-fermented for 24 hours, and finally a total of 7600ml of ethanol solution was collected, with an ethanol volume fraction of 24.0%, and a total ethanol yield of 5.09g / 100g sweet sorghum stalks, reaching the theoretical yield of ethanol 78.5%, the total residual...

Embodiment 2

[0049] Use crushed sweet sorghum stalks with a water content of 80%, a total sugar content of 13% to 14%, and a reducing sugar content of 6% to 7% as raw materials, feed 120L through a screw conveyor, and inoculate Angel high active dry yeast Saccharomyces cerevisiae at the same time (inoculum size 0.5%), and add nutrients (0.5% (NH 4 ) 2 SO 4 , 0.5% CaCl 2 ), adjust the pH to about 5.0, replace the air in the system with CO2 after the feed is completed, turn on the fan and heat pump device after the replacement, control the temperature in the fermentation tower at 35°C, and the temperature of the heat pump evaporator at 5-10°C, CO 2 Flow 3.6m 3 / h, collect crude ethanol from the bottom of the heat pump evaporator at intervals, and open the four-stage screw conveyor at the same time to continuously feed and discharge materials after the fermentation starts. The feeding and discharging speeds remain the same, both at 20L / 24h. 180L, a total of 11600ml of ethanol solution was...

Embodiment 3

[0051] With water content 66.5%, the fresh kudzu root of starch content 17.15%, chop into 10~15cm small section, steam explosion treatment 3.5min under the condition of steam pressure 0.8Mpa, feed 120L of steam explosion kudzu root through screw conveyor, feed Simultaneously add glucoamylase (65U / g substrate), inoculate Angelica high activity Saccharomyces cerevisiae (inoculum size 0.5%), and add nutrient salt (0.1% (NH 4 ) 2 SO 4 , 0.1% KH 2 PO 4 ), adjust the pH to be about 5.0, and use CO 2 Replace the air in the system, turn on the fan and heat pump device after the replacement, control the temperature in the fermentation tower at 35°C, the temperature of the heat pump evaporator at 5-10°C, CO 2 Flow 3.6m 3 / h, crude ethanol was collected from the bottom of the heat pump evaporator at intervals, and fermented for 60 hours. Finally, 12500ml of ethanol solution was collected, with a volume fraction of 36%. The total ethanol yield was 9.2g / 100g kudzu root, and the starch...

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Abstract

The invention relates to a method and equipment for continuous solid-state fermentation and gas-stripping heat-pump coupling separation of a product. The method comprises the following steps: utilizing spiral conveyors to realize continuous charging and discharging; utilizing gas stripping solid-state fermentation to separate a fermentation product online; obtaining the fermentation product through the coupling separation of a heat pump and the gas stripping; and recycling the fermentation product entrained in an exhaust gas by an absorption system. The method has the advantages that: the continuous production of the solid-state fermentation is realized; the gas stripping fermentation eliminates product inhibition and improves the mass transfer and the heat transfer of a system; the fermentation, the gas stripping and the hot pump form a heat closed-loop cycle system, and the energy consumption of the system is low; and the system has low water consumption and no pollution to realize clean production, so the method and the equipment have wide adaptability and great promotion significance.

Description

technical field [0001] The invention belongs to the field of solid-state fermentation, and in particular relates to a method and equipment for coupling and separating continuous solid-state fermentation and a product gas-lifting heat pump. Background technique [0002] Solid state fermentation is a fermentation process with little or no free water. Humans have long applied solid-state fermentation technology to food production, and almost all ancient fermented products were produced using solid-state fermentation technology. Compared with liquid fermentation, solid-state fermentation has the advantages of low energy consumption, less pollution, and environmental friendliness. However, the traditional solid-state fermentation production process is not continuous and it is difficult to achieve effective control of mass transfer and heat transfer in the process, forming a solid-state fermentation process. Restricting factors for large-scale industrial production and applicatio...

Claims

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Application Information

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IPC IPC(8): C12P7/10C12P7/36C12P7/16C12M1/38C12M1/00C12R1/865C12R1/145
CPCY02E50/16C12M21/16C12M47/18Y02E50/10Y02P20/129
Inventor 陈洪章丁文勇代树华李军王岚
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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