Plant food by-products as feed: Characteristics, possibilities, environmental benefits, and negative sides

Modern society accumulates huge amounts of waste material, particularly in the food industry, where manipulation is usually inadequate and causes a serious ecological problem. As this state is unsustainable and a concern for the future, food by-products must be used as raw materials in further production, because they are often still rich in nutrients or bioactive compounds. This paper provides a comprehensive review of plant food by-product application in animal nutrition around the world. In addition, special attention is paid to ecological benefits, and warns about the potential hazards and negative sides of plant food by-products usage in animal nutrition.