Use this URL to cite or link to this record in EThOS:
Title: Some factors affecting the design and operation of proposed pilot plant for the enzymic hydrolysis of fatty fish, with emphasis on the separation of oil
Author: Magnavita, A.
ISNI:       0000 0001 3616 3942
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 1976
Availability of Full Text:
Access from EThOS:
Some progress has already been made in the development of an enzymic process for the recovery of protein from fish and fish waste. These processes have so far been applied to non-fatty fish where the oil content in the dried product will be low. However many underutilised and underexploited species and also offal have high oil contents. The production of a soluble protein with a desired low oil content from such material line proved difficult. The present investigation concerns the hydrolysis of fatty fish with particular emphasis on the separation of oil from the hydrolysate to produce a soluble dried product with less then 1% oil. An additional constraint was that a high quality oil should be recovered. Laboratory tests were carried out to optimise the process so that a pilot plant could be constructed. The pilot plant was then used to determine the parameters for the required separation of oil using a continuous centrifuge. By means of careful control of the process, especially centrifugation, the required separation was achieved. Three products were obtained, the soluble protein with a low oil content, the clear high quality oil low in FFA and the undigested solid which could be dried and which probably would be suitable for animal feeding.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available