Fish feeding stuff - with sludge from biological effluent treatment replacing part or whole

摘要

Animal feeding stuff, esp. for fish but also suitable for mink, consists wholly or partly of thickened sludge. This is available from biological treatment plants for the waste water from piscicultural establishments, from stables of animal farms, breweries or yeast factories. This replaced a part of the conventional fishmeal which is becoming more rare and saves the import of albumin carriers such as soy beans. The resulting mix is easily digestible, as the sluge contains 30-40% albumin.