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Method for producing protein feed material by utilizing food wastes

A protein feed and kitchen waste technology, applied in the molding or processing of animal feed, animal feed, animal feed, etc., can solve the problems of hidden safety hazards, neglect of the risk of food waste, etc., to remove peculiar smell, reduce homologous phase The effect of the risk of eating

Inactive Publication Date: 2010-02-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the processes only sort, pretreat, dehydrate, and dry food waste and directly process it into protein feed raw materials, while ignoring the risks of food waste as feed, including pathogenic microorganisms and animal-derived components. If not handled properly, there may be potential safety hazards

Method used

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  • Method for producing protein feed material by utilizing food wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A food waste treatment plant has a daily processing capacity of 50 tons. The collected food waste is discharged into the hopper and sent to the mechanical sorting machine by the scraper conveyor. After sorting, it is manually sorted to further separate plastic bags, chopsticks, The sundries such as bottle caps are cleaned and recycled; the sorted food waste is crushed to 1-10mm, and sent to the damp heat reactor through a rotary piston pump into the pipeline; the moisture content of the material is adjusted to 80%, and the indirect steam Heating, when the temperature reaches 135°C, continue to cook for 80 minutes; the cooked material is separated from the solid and liquid by a plate and frame filter press, and the moisture content of the solid after the filter is 40-50%; the liquid after the oil-water separation is separated by a disc filter. Centrifuge for oil-water separation, oil recovery, waste water into the sewage pipe network into the sewage treatment plant; solid...

Embodiment 2

[0025] A food waste treatment plant has a daily processing capacity of 100t. The collected food waste is discharged into the hopper and sent to the mechanical sorting machine by the scraper conveyor. After sorting, it is manually sorted to further separate plastic bags, chopsticks, The sundries such as bottle caps are cleaned and recycled; the sorted food waste is crushed to 1-10mm, and sent to the damp heat reactor through a rotary piston pump; the moisture content of the material is adjusted to 85%, and the steam is used for indirect Heating, when the temperature reaches 145°C, continue to cook for 70 minutes; the cooked material is separated from the solid and liquid by a plate and frame filter press, and the moisture content of the solid after the filter is 40-50%; the liquid after the oil-water separation is separated by a disc filter. The centrifuge performs oil-water separation, oil recovery, and waste water is discharged into the sewage pipe network and enters the sewag...

Embodiment 3

[0027] A food waste treatment plant has a daily processing capacity of 100t. The collected food waste is discharged into the hopper and sent to the mechanical sorting machine by the scraper conveyor. After sorting, it is manually sorted to further separate plastic bags, chopsticks, The sundries such as bottle caps are cleaned and recycled; the sorted food waste is crushed to 1-10 mm, and sent to the damp heat reactor through a rotary piston pump; the moisture content of the material is adjusted to 90%, and the steam is used for indirect Heating, when the temperature reaches 160°C, continue to cook for 60 minutes; the cooked material is separated from solid and liquid by plate and frame filter press, and the moisture content of solid after filter press is 40-50%; the liquid after oil-water separation is separated by disc filter Centrifuge for oil-water separation, oil recovery, waste water into the sewage pipe network into the sewage treatment plant; solid matter into the biolog...

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Abstract

The invention relates to a method for producing protein feed material by utilizing food wastes, belonging to the field of solid waste treatment. The method comprises the following steps: separating and crashing food wastes, and then carrying out heat-moisture treatment; adding bran in solid matters after solid-liquid separation, and inoculating appropriate among of microbes for anaerobe fermentation so as to obtain the protein feed material. Microbes of the solid matters are converted by adding 10-15 percent of bran, taking aspergillus niger, candida utilis and lactobacillus as mixed fungicides according to the ratio of 1: 2: 2 with the inoculation amount of 0.5-2 percent and carrying out anaerobic fermentation for 35-55h at 30 DEG C. The treated product reaches requirements of Feed Hygiene Standard (GB13078-2001) in China, is not easy to go bad and easy to be stored, and bovine-derived and ovine-derived materials of the product are measured to be both negative. The method can effectively kill pathogenic microbes in the food wastes, converts macromolecular proteins, such as animal-based protein, and the like into micromolecular proteins that are absorbed more easily, thereby also reducing the risks caused by isogenous invitro-cannibalism of food feed products.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and disposal, and in particular relates to a method for producing protein feed raw materials from kitchen waste. Background technique [0002] With the rapid development of my country's economy, the urban population has grown rapidly, people's living standards have continued to improve, and the urban catering industry has become increasingly prosperous, resulting in an unprecedented increase in the amount of kitchen waste generated. In 2006, the retail sales of the national urban catering industry was 1,034.5 billion yuan, and in 2007 it reached 1,235.2 billion yuan, with an average annual growth rate of 17.9%. Excluding small towns, large and medium-sized cities across the country generate more than 20 million tons of kitchen waste every year. [0003] Compared with other municipal solid waste, kitchen waste has high water content, high organic matter content, high oil content and ...

Claims

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Application Information

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IPC IPC(8): A23K1/10A23K10/12A23K40/10
Inventor 金宜英聂永丰孟潇任连海陈婷
Owner TSINGHUA UNIV
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