Method for producing ethanol by continuous solid state fermentation of restaurant-kitchen garbage

A food waste and solid-state fermentation technology, applied in the field of waste resource utilization, can solve problems such as low production efficiency and secondary pollution, and achieve the effects of avoiding wastewater treatment, increasing degradation rate, and increasing concentration

Inactive Publication Date: 2011-09-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology

The purpose of the present invention is to solve the problems of low production efficiency and secondary pollution in the current utilization of kitchen waste, and to invent a method for continuous solid-state fermentation of kitchen waste to produce ethanol, effectively solving the problem of producing ethanol from kitchen waste. The problem of ethanol, while solving environmental problems, meet the society's growing demand for liquid fuels by producing liquid fuels through high-efficiency, low-cost, and clean production processes

Method used

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  • Method for producing ethanol by continuous solid state fermentation of restaurant-kitchen garbage

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Embodiment 1

[0019] The food waste collected from a university canteen was first analyzed for its nutritional components. The analysis results showed that every 100g of dry food waste contained 13.6g of fat, 23g of total sugar, 12.5g of reducing sugar, 10.5g of non-reducing sugar, fiber Vegetables 12.1g. The food waste was subjected to steam explosion treatment in a 500L steam explosion tank 7 under the conditions of a temperature of 150° C. and a treatment time of 5 minutes. After the treatment is completed, add 4000U glucoamylase, 200IU cellulase, and 0.01g Angel high-temperature-resistant active dry yeast into the continuous solid-state fermentation reaction tower 10 through the screw feeder 9 according to the ratio of 4000U glucoamylase and 0.01g Angelica high-temperature-resistant active dry yeast. Start fermentation, control the temperature of the material in the continuous solid-state fermentation reaction tower at 35-37°C by controlling the flow rate of the Roots circulation fan 14...

Embodiment 2

[0021] The food waste collected from a hotel was first analyzed for its nutritional components. The analysis results showed that every 100g of food waste (dry weight) contained 14.3g of fat, 22.3g of total sugar, 12.1g of reducing sugar, and 10.2g of non-reducing sugar. g, cellulose 12.5g. The food waste was subjected to steam explosion treatment in a 500L steam explosion tank 7 under the conditions of a temperature of 155° C. and a treatment time of 4 minutes. After the treatment is completed, add 4000U of glucoamylase, 220IU of cellulase, and 0.015g of Angelic high-temperature-resistant active dry yeast for brewing wine into the continuous solid-state fermentation reaction tower 10 through the screw feeder 9 according to the ratio of 4000U of glucoamylase and yeast for every 100g of food waste. Start fermentation, control the temperature of the material in the continuous solid-state fermentation reaction tower at 35-37°C by controlling the flow rate of the Roots circulation ...

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Abstract

The invention discloses a method for producing ethanol by continuous solid state fermentation of restaurant-kitchen garbage. The method comprises the following basic steps of: (1) performing steam explosion pretreatment on the restaurant-kitchen garbage; (2) adding saccharification enzyme, cellulase and active dry yeast into the treated raw materials; (3) continuously delivering the raw materials to a reactor under set conditions to perform continuous ethanol fermentation and extraction; and (4) automatically discharging the fermentation residue out of the reactor, and drying the fermentation residue in a continuous dryer to form an organic fertilizer. The wastewater treatment problem in the production is avoided by adopting a solid state fermentation process, the treatment efficiency of the garbage is improved by adopting a continuous production process, and heat energy produced in the fermentation process is fully utilized for extraction of the ethanol through a coupled heat pump system so as to reduce the energy consumption and reduce the production cost of the ethanol. The organic fertilizer can be obtained besides the ethanol in the production process, wastes and new pollutants are totally not produced in the production process, and full digestion and full utilization of the restaurant-kitchen garbage are realized.

Description

technical field [0001] The invention belongs to waste resource utilization technology, in particular to a method for producing ethanol by continuous solid-state fermentation of kitchen waste. Background technique [0002] Food waste refers to the food waste generated in the daily life of residents and food processing. The sources are mainly concentrated in hotels, food factories, schools, governments, scientific research institutions, etc., and are an important part of urban domestic waste. The main components of food waste include rice and flour food residues, vegetables, animal and vegetable oils, meat and bones, etc. From the chemical composition, there are starch, cellulose, protein, lipids and inorganic salts. [0003] In recent years, with the improvement of the living standards of urban people in our country, the amount of food waste generated has increased rapidly. Statistics from the Institute of Solid Waste Pollution Control and Recycling of the Environmental Depa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08C05F9/00
CPCC12M21/16C12M45/20C12M21/12C12M45/02
Inventor 陈洪章李宏强
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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