Feeding fish with industrial waste
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Distiller's grain is made from sorghum and other raw materials. Distillers' grain is 62% watery and contains 29% of crude protein. The nutritional value is close to inferior bran and can be mixed with other feeds to feed fish.
Brewer's grains are good for feeding fish with fresh brewers' grains. The amount of feed should not be too high and should be controlled below 15% of the total fish feed.
Soy sauce grains contain a small amount of salt and must be mixed with other feeds. The amount of feed should account for about 10% of the total amount of feed.
The main raw materials for starch mash are mung beans, broad beans and corn. The fresh starch residue has many moisture contents and high nutritional value and can be directly used for feeding fish. Dry corn residue after pressing, containing about 22% of digestible protein, is a good concentrate for fish.
Bean curd residue is the main by-product of the soybean product factory. When it is fresh, it contains 8.2% of water, 2% to 5% of protein, less crude fiber, and can be used as an auxiliary feed for fish.
Beet Residues Fresh beet slag is nutritious, slightly sweet, and the fish loves to eat. It works well for feeding fish.
Bagasse contains a large amount of cellulose and less protein, but after fermentation, it can also be mixed with the feed to feed the fish.