Method for treating waste food residues

Abstract

The invention discloses a method for treating waste food residues. The method comprises the following steps: soaking mushroom residues with an E solvent for 6 to 12 h, carrying out filtering, then preparing a feed from filter residues, and subjecting a filtrate to high-temperature evaporative concentration and drying to prepare edible brown pigment which has a color index of 37000 EBC and stable performance and is applicable to the food industry and the medicine industry. The prepared feed has high protein content. The method of the invention allows the waste residues, i.e., the mushroom residues, obsessing the food industry for years to become the edible brown pigment and the feed with high economic benefits, treats waste gas, waste water and industrial residues, and achieves good effect.

Description

technical field [0001] The invention relates to a method for processing food waste. Background technique [0002] Edible brown pigment, like other food colorings, can be prepared in various ways. Some are extracted from plants that naturally have pigments, such as black beans, black glutinous rice, and salvia. Some are produced by the ammonium salt method using sugary raw materials; or the molasses is fermented to separate the sugar and then concentrated and separated. These methods mainly all are the higher industrial raw materials and natural plants of the price of using, thereby cost is higher. For this reason, a lot of documents disclose the method of utilizing food industry waste to produce food coloring. Contents of the invention [0003] The purpose of the present invention is to utilize food production waste residue (comprising Aspergillus niger, bran, starch residue) to extract food pigment and use it to make by-product feed. [0004] The scheme of the present...

AI Technical Summary

Problems solved by technology

These methods mainly all use higher industrial raw materials and natural plants, so the cost is higher.