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Method for producing fuel ethanol and feed protein by using college mess hall kitchen waste

A technology for kitchen waste, university canteens, applied in the directions of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., to achieve the effect of high speed, saving reaction time and cost, and high purity

Active Publication Date: 2014-09-24
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Effect test

specific Embodiment approach 1

[0028] Embodiment 1: A method for producing fuel ethanol and feed protein from kitchen waste in a university canteen is realized through the following steps:

[0029] (1) Crushing and cooking of raw materials

[0030] The kitchen waste from the university canteen is crushed with a tissue crusher to make the solid particle size ≤ 5mm, add 1~2 times of water, stir and cook for 30min at 100°C, then remove the water, and add 1~2 times of water again , continue cooking for 15 minutes;

[0031] (2) centrifugation, drying and dehydration

[0032] Use a horizontal centrifuge to separate the solid and liquid, take the solid part, and use the microwave vacuum drying method to dry and dehydrate the solid to a moisture content of 30% to 40 %;

[0033] (3) Extrusion and puffing treatment

[0034] Using a twin-screw extrusion extruder at a screw speed of 100-150r / min and a temperature of 140-160°C, the dried kitchen waste is extruded and expanded;

[0035] (4) Synchronous saccharifica...

specific Embodiment approach 2

[0042] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step (2), the microwave vacuum drying power is 6-8w / g, and the solid is dried and dehydrated to a moisture content of 32%-35%. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step (2), the microwave vacuum drying power is 7w / g, and the solid is dried and dehydrated to a moisture content of 33%. Other steps are the same as in the first embodiment.

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Abstract

The invention discloses a method for producing fuel ethanol and feed protein by using college mess hall kitchen wastes, belonging to the biochemical field. The invention relates to a new method for producing ethanol and feed protein by using college mess hall kitchen wastes as raw materials. The invention solves the problems of complex process, high production cost, low product yield and great industrial production difficulty existing in the existing method for producing ethanol and feed protein by using kitchen wastes. The method for producing fuel ethanol and feed protein by using college mess hall kitchen wastes comprises the following steps of: 1) crushing, steaming and boiling of raw materials; 2) centrifugal separation, drying and dehydration; 3) extruding-expansion treatment; 4) synchronous saccharification and fermentation; 5) ethanol distillation; and 6) residual protection separation and preparation. Since the college mess hall kitchen wastes are used as raw materials to produce ethanol and feed protein, not only can the production costs of ethanol and feed protein be greatly decreased, but also the goals of turning the wastes into valuable things, improving the added value of the college mess hall kitchen wastes and preventing the college mess hall kitchen wastes from causing environmental pollution and social harm can be achieved.

Description

[0001] Technical field: The present invention relates to a method for producing fuel ethanol and feed protein from kitchen waste in university cafeterias. Background technique: [0002] Kitchen waste refers to the food waste produced in the daily life of residents and other activities such as food processing, catering services, and unit meals, mainly in the form of starch, food fiber, animal fat, etc. Mainly, it is the main component of the organic phase in municipal solid waste. It has the characteristics of high moisture content, high oil and salt content, and is easy to rot, ferment, and stink. The channels of its generation are mainly food processing, handling, transportation and other processes, and the sources are mainly concentrated in hotels, food factories, schools, governments, scientific research administrative institutions, etc. Perishable organic matter has high moisture and oil content. If it is incinerated with domestic waste, the heat energy utilization of inci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/08C12P19/14C07K1/30C12R1/865
Inventor 焦岩常影解天怡孙英尉曹洪爽薛新宇
Owner QIQIHAR UNIVERSITY
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