A method for simultaneous preparation of mycelium fiber and ethanol by fungal fermentation of food waste

A technology of food waste and fungi, which is applied in the field of synchronous preparation of mycelium fiber and ethanol by fungal fermentation of food waste, can solve the problems of affecting fermentation efficiency, low utilization rate, and difficulty in oil extraction and recovery, so as to improve separation efficiency and increase additional value effect

Active Publication Date: 2021-08-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing biological treatment process also has the following disadvantages: (1) slow hydrolysis rate of macromolecular organic matter in kitchen waste, long anaerobic digestion efficiency and aerobic composting cycle; (2) oil extraction Recycling is difficult, utilization rate is low, and subsequent fermentation efficiency is affected; (3) After the great success of shale gas, the market price of biogas is low and organic fertilizer is facing difficulties in product sales

Method used

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  • A method for simultaneous preparation of mycelium fiber and ethanol by fungal fermentation of food waste

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Embodiment 1

[0025] see figure 1 , figure 1 It is a schematic flowchart of a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of food waste. This embodiment provides a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of food waste. The specific process is as follows:

[0026] After draining the kitchen waste from the campus restaurant, sort out impurities such as plastic, metal, fabric, bone and chopsticks, and then perform high-speed mechanical crushing with a speed of 25,000 rpm and a crushing time of 3 minutes. Dilute the homogeneous kitchen waste obtained after crushing with water, adjust the solid content to about 13wt.%, and then perform thermal hydrolysis pretreatment. The pretreatment temperature is 120°C, the treatment time is 1h, the stirring speed is 200rpm, and the reaction is over. Afterwards, the temperature was lowered to 50°C by condensing water. After thermal hydrolysis, the kitchen waste is centrifu...

Embodiment 2

[0028] This embodiment provides a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of food waste, and the specific process is as follows:

[0029] The food waste fermented liquid that reclaims mycelia fiber and ethanol through a fungus (Aspergillus niger) fermentation in Example 1 is sterilized again, and the food waste COD concentration after one fermentation is 70.8g / L, and the total sugar concentration is 70.8g / L. The remaining fungal fermentation liquid after sterilization was inoculated with Aspergillus niger suspension again for fungal fermentation. After 5 days of shaking culture at 28°C and 150rpm, the concentration of fungal mycelium fibers reached 14.0g / L, and the concentration of ethanol was greater than 6.0g / L.

Embodiment 3

[0031] This embodiment provides a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of food waste, and the specific process is as follows:

[0032] After the fungal fermentation of the thermal hydrolyzate of food waste is completed, mycelium particles are recovered by vacuum filtration method, and the suction filtration screen is 200 mesh. The recovered mycelium particles are decomposed by adding water. During the decompression process, the concentration of mycelium fibers is 1.0wt.%, the decompression speed is 3500rpm, and the decompression time is 1min. The diluted net concentration is 0.1wt.%. After stirring or bubbling, the mycelium fibers are evenly dispersed. After standing for 10 seconds, the negative pressure generated by the dehydration element under the net is used to filter, so that the mycelium fibers are evenly deposited on the net. On the surface, a paper sheet is formed, and the formed paper sheet is dehydrated by pressure filt...

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Abstract

The invention discloses a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of food waste, comprising the following steps: S1, sorting and crushing the food waste to obtain homogenized pulped food waste; S2, taking The homogenized pulped kitchen waste is subjected to thermal hydrolysis pretreatment to obtain a thermal hydrolyzate; S3, the thermal hydrolyzate is subjected to three-phase separation to obtain oil, thermally hydrolyzed supernatant and solid residue; S4, Taking the thermal hydrolysis supernatant to inoculate fungal strains that can grow into fungal hyphae and have the ability to metabolize ethanol to carry out fungal fermentation to obtain fungal mycelium and fungal metabolite ethanol, and recover the fungal mycelium and fungal metabolites after fungal fermentation Ethanol to obtain the remaining fungal fermentation broth. Utilizing the method of the present invention can effectively utilize the waste as a resource, can significantly increase the added value of the kitchen waste as a resource, and overcome the defect that the current biological fermentation uses methane as a single energy product.

Description

technical field [0001] The invention relates to the field of solid waste treatment and resource utilization, in particular to a method for synchronously preparing mycelium fiber and ethanol by fungal fermentation of kitchen waste. Background technique [0002] With the improvement of people's living standards, the output of kitchen waste continues to increase. Food waste has a high water content, high organic matter content, and rich nutrition, which can easily cause mosquitoes and flies to breed, rot and deteriorate, spread germs, and emit foul-smelling gases. It has become a huge burden on the urban environment. Therefore, it is urgent to carry out reasonable and efficient treatment and disposal of kitchen waste. [0003] Food waste contains a large amount of organic nutrients such as starch, protein, fat, and cellulose, and contains huge potential and rich resource substances. At present, the main disposal methods of food waste include anaerobic fermentation, aerobic co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B3/80B09B2101/02B09B3/40
Inventor 李晓岩梁嘉晋李炳李若泓
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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