Abstract: Method and machine for pelleting dry pellets from the mass (11) containing thermo-hardening substances, particularly for use as fish feed, where the mass is first compressed and then heated to a thermo-hardening temperature and finally cooled. The bi-products from heating, such as fat, other liquids or gas, are drained off in or near the heating zone (6) and are brought in contact with and thereby returned to the thermo-hardened mass after this has been cooled.
Abstract: A method for feeding fish raised in a pisciculture environment wherein fish feed is conducted to the fish pen or enclosure carried by a stream of water. To give the feed increased buoyancy after it is introduced into the enclosure, the stream of water is oversaturated with gas, such that gas bubbles penetrate into and/or adhere to the fish feed.
Type:
Grant
Filed:
May 14, 1985
Date of Patent:
November 24, 1987
Assignee:
Akva A/S
Inventors:
Ole Molaug, Sveinung B. Havrevold, Odd Skj veland
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