Abstract
Abstract Poultry wastes can be converted into a high-protein feedstuff for farm animals by upgrading with house-fly pupae. This process solves the problems of accumulation of poultry wastes which may not be attractive as soil fertilizer and cause pollution. If this upgrading of manure takes place, a reasonable animal protein feedstuff will be created and partially solve the problems of human malnutrition by increasing the animal protein supply in the form of meat, milk, butter and eggs. From the few published relevant data the following may be concluded. The housefly-pupa meal is produced from caged layer manure. This feedstuff is characterized by a high content of crude protein of 61·4% and further contains fat (9·3%), ash (11·9%) and metabolizable energy (10·3 MJ/lg). The pupa meal is a good source of essential amino acids, mainly arginine (3·7%), lysine (3·8%) and methionine (1·6%). It is a relatively well-balanced protein source for poultry. With an additional building to layer houses, it is possible to produce, continuously, upgraded manure composed of pupa mixed with manure residue, this stuff will be treated by heat up to 180°C to be sterilized, dried and may be used as a feedstuff in animal nutrition.
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