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

A food waste and solid-state fermentation technology, which is applied in the field of waste resource utilization, can solve the problems of secondary pollution and low production efficiency, and achieve the effects of avoiding waste water treatment, increasing efficiency, and optimizing production environment conditions

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 producing butanol by continuous solid-state fermentation of kitchen waste. While solving environmental problems, Produce liquid fuels through high-efficiency, low-cost, and clean production processes to meet society's growing demand for liquid fuels

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

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Embodiment 1

[0019] The food waste collected from a large enterprise canteen was first analyzed for its nutritional components. The analysis results showed that every 100g of food waste contained 2.04g of fat, 3.45g of total sugar, 1.88g of reducing sugar, and 1.57g of non-reducing sugar. Cellulose 1.82g, water content 85%. First, use a high-speed centrifuge to remove the excess water in the food waste at a speed of 5000 rpm. After the dehydration is completed, the water content of the food waste is reduced to 47.5%. The extracted liquid contains a certain amount of organic components and is used as liquid fertilizer. The dehydrated food waste is subjected to steam explosion treatment in a 500L steam explosion tank 14 under the conditions of a pressure of 1.4 MPa and a treatment time of 180 seconds. After the treatment is completed, 4000 U of glucoamylase is added per 100 g of kitchen waste, and 200 IU of cellulase is sent into the continuous solid-state fermentation reaction tower 18 thr...

Embodiment 2

[0021]The food waste collected from a large hotel was first analyzed for its nutritional components. The analysis results showed that every 100g of food waste contained 2.14g of fat, 3.45g of total sugar, 1.88g of reducing sugar, 1.57g of non-reducing sugar, fiber Vegetables 1.72g, water content 85%. First, use a high-speed centrifuge to remove the excess water in the food waste at a speed of 5500 rpm. After the dehydration is completed, the water content of the food waste is reduced to 45%. The extracted liquid contains a certain amount of organic components and is used as liquid fertilizer. The dehydrated food waste is subjected to steam explosion treatment in a 500L steam explosion tank 14 under the conditions of a pressure of 1.3Mpa and a treatment time of 170 seconds. After the treatment is completed, 4500 U of glucoamylase is added per 100 g of kitchen waste, and 200 IU of cellulase is sent into the continuous solid-state fermentation reaction tower 18 through the screw...

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Abstract

The invention discloses a method for producing butanol by continuous solid state fermentation of restaurant-kitchen garbage. The method comprises the following basic steps of: (1) performing liquid-solid separation on the restaurant-kitchen garbage by using a centrifugal dehydrator; (2) performing steam explosion pretreatment on the dehydrated restaurant-kitchen garbage; (3) adding saccharification enzyme into the treated restaurant-kitchen garbage according to the weight, and delivering the cellulase to a continuous solid state fermentation reactor; (4) continuously inoculating the cultured clostridium acetobutylicum seed solution to a culture medium; (5) continuously delivering the raw materials to the reactor under set conditions to perform continuous butanol fermentation and extraction; (6) rectifying the condensed solvent to obtain pure products of acetone, ethanol and butanol; and (7) further drying the fermentation residue through a continuous dryer till the water content is less than 14 percent to prepare an organic fertilizer. By adopting the continuous solid state fermentation process, wastewater treatment is avoided, the treatment efficiency is increased, the energy consumption is reduced, and the production cost of the butanol is reduced.

Description

technical field [0001] The invention belongs to waste resource utilization technology, in particular to a method for producing butanol 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): C12P7/16C12P7/08C12P7/28C05F9/00C12R1/145
CPCC12M45/20C12M43/02C12M47/14C12M21/16C12M45/02C12M21/12C12M45/04Y02P20/129
Inventor 陈洪章李宏强
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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