Process for preparing bio-fuel and protein feed from food waste by means of microbial fermentation

A technology for microbial fermentation and food waste, applied in the direction of biofuels, microbial-based methods, biochemical equipment and methods, etc., can solve the problem of single products and achieve good economic results

Inactive Publication Date: 2010-07-14
HUAZHONG AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect of single product in the prior art, and to develop a method for preparing biodiesel, alcohol-based fuel, biogas fuel and feed protein through comprehensive treatment of kitchen waste and ...

Method used

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  • Process for preparing bio-fuel and protein feed from food waste by means of microbial fermentation
  • Process for preparing bio-fuel and protein feed from food waste by means of microbial fermentation

Examples

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Effect test

Embodiment 1

[0010] Example 1: Biodiesel, alcohol-based fuel, and protein feed were prepared by collecting leftovers from canteens.

[0011] Add water to 1000g of leftover rice and leftovers mixture to obtain coarse solid material and oil-water mixture, and the solid part is pulverized by a tissue grinder and then filtered by a filter press to obtain fine solid material and oil-water mixture. The two parts of the oil-water mixture are mixed and then pass through the unpowered oil-water separator (attached figure 1 ) to obtain oil and waste water containing a large amount of organic matter, after the separation, obtain 86g of oil separation and extraction of oil, and obtain 81g of biodiesel by esterification and transesterification two-step method; the solid-liquid ratio of the waste water after the above separation and the press filtration is 1:1.5, add 2% amylase, 2% glucoamylase and 1% Saccharomyces cerevisiae for mixed fermentation. Afterwards, ethanol was obtained by distillation at 8...

Embodiment 2

[0012] Example 2: Collecting swill from food stalls to prepare biodiesel, alcohol-based fuel, and protein feed

[0013] 1000g of swill is filtered to obtain coarse solid and oil-water mixture, and the solid part is pulverized by a tissue grinder and then press-filtered to obtain fine solid and oil-water mixture. The two parts of the oil-water mixture are mixed and then passed through the unpowered oil-water separator to obtain grease and waste water containing a large amount of organic matter. After separation, 120g of grease is obtained by separating and extracting grease, and 103g of biodiesel is obtained by two-step esterification and transesterification; Add amylase, glucoamylase, and Saccharomyces cerevisiae to the waste water and the fine solid material after press filtration, and then distill to obtain ethanol to produce 67.2g of ethanol; The mixed residue is passed through pressure filtration again to obtain residue solids and waste water, then add water-absorbing biom...

Embodiment 3

[0014] Example 3: Collecting swill from hotels to prepare biodiesel, alcohol-based fuel, and protein feed

[0015] Separation of 1000g of swill to obtain crude solids and oil-water mixture, the oil-water mixture is then passed through a non-powered oil-water separator to obtain oil and waste water, after separation, 88g of oil is obtained by separating and extracting oil, and 73g of biodiesel is obtained by two-step esterification and transesterification; the above separation After the waste water and the fine solid material after press filtration adjust the solid-liquid ratio to be 1: 10, add Clostridium acetobutylicum after sterilization and prepare butanol 43.1g by anaerobic fermentation; Wastewater, then add water-absorbing biomass such as bran to the residue solid material, then dry and pulverize, make protein feed to obtain 207g protein feed, the protein content is 42.0% after determination; waste water is fermented to obtain about 260L of methane.

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Abstract

The process has the steps that food wastes are filter-pressed in a filter press for solid-liquid separation; oil and water are naturally separated through an oil-water separator; the separated oil is used for preparing biodiesel; solid residuals are added with glucoamyLase and microbial strains for saccharification together with fermentation after being liquefied and sterilized; the product from the fermentation process can be distilled so as to obtain alcohol base fuel and high-protein feed and can also be extracted and fermented together with microorganisms by means of biodiesel to prepare alcohol base fuel; and the base solution in a distillation kettle can reach the national emission standards after being processed with photosynthetic bacteria. The process has the characteristics that nutrients and residual liquid in food waste are fully recycled, and differences between ingredients in the food waste are utilized to regenerate various products, thereby lowering product cost and meeting the requirements for the development of circular economy.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to a method and a special device for producing biodiesel, alcohol-based fuel and protein feed by using kitchen waste. Background technique [0002] Kitchen waste is a general term for leftovers discarded by families and catering units, and is an important part of urban domestic waste. my country produces a huge amount of kitchen waste. According to the National Environmental Bulletin, in 2006, more than 20 million tons of municipal solid waste were removed and transported, of which kitchen waste accounted for 30% to 50% of the total municipal solid waste. Food waste mainly includes rice and flour food residues, vegetables, vegetable oil, animal oil, meat and bones, etc. In terms of chemical composition, there are starch, cellulose, protein, lipid and inorganic salt. Its characteristics are as follows: 1. The content of organic matter such as crude protein and c...

Claims

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Application Information

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IPC IPC(8): C12P7/64C12P7/08C12P7/16C12P5/02A23K1/10C02F3/34C12R1/01C12R1/145C12R1/865
CPCY02E50/13Y02E50/343Y02E50/10Y02E50/30
Inventor 李庆蔡皓郝勃李霞邓金华
Owner HUAZHONG AGRI UNIV
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