Recycling of Industrial Food Waste Resources

wallpapers Innovation 2020-08-20

The Need to Address Food Loss

On a global scale, 1/4 to 1/3 of food is discarded, and food waste is generated as much as 1.3×109t every year. Therefore, disposal of food waste is also a major issue. Because the unrestrained degradation of food waste will lead to global warming, and the waste of food resources will also reduce sustainability. The food loss caused by industrial processing facilities is a small part (5%) of the total food loss. This link has many advantages in solving the problem of food waste. First of all, most food losses have obvious geographic characteristics. In contrast, industrial food produces a large amount of losses at a specific point in time, which reduces the difficulty of capturing its value. Second, industrial food loss streams are relatively homogeneous in nature because they are by-products of specific products being processed. This homogeneity can lock every food loss stream to a high-value product, and the economic benefits of these products prove the necessity of biotransformation or separation.

The Environmental Impact of Food Waste from Industrial Applications

Food waste from industrial applications can be transferred from landfills to more valuable processing. After processing, there will still be some low-value wastes that need to be processed. However, this treatment will reduce greenhouse gas emissions because most complex carbohydrates will be simplified in downstream processing. High-value waste can be transferred from the landfill to the processing link to recover value. A small amount of waste will be treated, but because many complex chemicals have been reduced or removed during the treatment process, greenhouse gas emissions can be reduced.

Products That Can Be Prepared from Industrial Food Waste

Liquid biofuel is an attractive end product of industrial food waste because it has a broad and reliable market, and the final combustion process can accept chemical heterogeneity, which may be produced when dealing with complex waste sources. Although both ethanol in carbohydrates and biodiesel in lipids have complete production processes, recent research advances have increased the feasibility of their production from industrial food waste. Antioxidants and phenols are high-value compounds that can increase the possibility of biological treatment of food waste. The antioxidants extracted from citrus peels can further promote ethanol production and obtain more valuable by-products. The antioxidants of citrus peel are extracted from methanol and have shown the effect of inhibiting cancer. Similarly, flavonoids also exhibit anti-inflammatory properties and can be extracted by the hot alkali method. Fish waste is an underutilized form of food waste that can be used for various products, including methane production.