RCHIVES

RCHIVES
FISHERIES I1ÇD MARINE SERVICE
Translation Series No.
4248
Production capacity with freeh vate
pelin
by J. Midtsaeter and P. Lohne
Ori9.ina1 title:
Produksjonskapasitet pa fersk vinterlodde
From: Meld. SSF (2): 12-13, 1977
Translated by the Translation Bureau
(PMJ)
Multilingual Services Division
Department of the Secretary of State of Canada
Department of Fisheries and the Environment
Fisheries and Marine Service
Halifax Laboratory
Halifax, N. S.
1978
4
pages typescript
ee
Fee.
•;eize
DEPARTMENT OF THE SECRETARY OF STATE
TRANSLATION BUREAU
MULTILINGUAL SERVICES
SECRÉTARIAT D'ÉTAT
BUREAU DES TRADUCTIONS
DIVISION DES SERVICES
CANADA
DIVISION
MULTILINGUES
Lf
TRANSLATED FROM - TRADUCTION DE
INTO - EN
English
Norwegian
AUTHOR - AUTEUR
John Midtsaeter and Per Lohne
TITLE IN ENGLISH - TITRE ANGLAIS
PRODUCTION CAPACITY WITH FRESH WINTER CAPELIN
TITLE IN FOREIGN LANGUAGE (TRANSLITERATE FOREIGN CHARACTERS)
TITRE EN LANGUE ÉTRANGÉRE (TRANSCRIRE EN CARACTLRES ROMAINS)
Produksjonskapasitet pa fersk vinterlodde
REFERENCE IN FOREIGN LANGUAGE (NAME OF BOOK OR PUBLICATION) IN FULL. TRANSLITERATE FOREIGN CHARACTERS.
RÉFÉRENCE EN LANGUE ÉTRANGÉRE (NOM DU LIVRE OU PUBLICATION), AU COMPLET, TRANSCRIRE EN CARACTÉRES ROMAINS.
Meldinger fra SSF
REFERENCE IN ENGLISH - RÉFÉRENCE EN ANGLAIS
Report from SSF
PUBLISHER - ÉDITEUR
DATE OF PUBLICATION
DATE DE PUBLICATION
SSF
YEAR
ANN ÉE
PLACE OF PUBLICATION
LIEU DE PUBLICATION
Bergen
REQUESTING DEPARTMENT
1977
t=-Mv(e_o 1JF( -c-kr-r
DIRECTION OU DIVISION
PERSON REQUESTING
DEMANDÉ PAR
YOUR NUMBÈR
VOTRE DOSSIER N°
DATE OF REQUEST
DATE DE LA DEMANDE
506-2 00-1 0.6 (RE V. 2/68)
7 630-2 1-029-6333
Ffif4E-1,2À/US
S'C'‘C ■11. /
eftp
ISSUE NO.
NUMÉRO
L'ORIGINAL
12 & 13
NUMBER OF TYPED PAGES
NOMBRE DE PAGES
DACTYLOGRAPHIÉES
2
TRANSLATION BUREAU NO
NOTRE DOSSIER N°
MINISTRE-CLIENT
BRANCH OR DIVISION
VOLUME
PAGE NUMBERS IN ORIGINAL
NUMÉROS DES PAGES DANS
ec'OL,
TRANSLATOR (INITIALS)
' TRADUCTEUR (INITIALES)
4
fl
• Secretary Secrétariat
d'État
of State
TRANSLATION BUREAU
BUREAU DES TRADUCTIONS
MULTILINGUAL SERVICES
DIVISION DES SERVICES
DIVISION
MULTILINGUES
1L
CLIENTS NO.
N 0 OU CLIENT
DEPARTMENT
MINISTiRE
9
DIVISION/BRANCH
CI TY
DIVISION/DIRECTION
yILLE
,
BUREAU NO.
N 0 DU BUREAU
LANGUAGE
LANGUE
TRANSLATOR (INITIALS)
TRADUCTEUR (INITIALES)
MAY
-
9 1.9 7
PRODUCTION CAPACITY WITH FRESH WINTER CAPELIN
(Produksjonskapasitet pa fersk vinterlodde)
by
"T
U
-
John Midtsaeter and Per Lohne
r
Meldinger fra SSE. 1977. (2): 12-13
C
Capacity measurements in a fish meal plant have shown that the pro-0
duction capacity with two day old capelin raw material was ca. 35% lower
compared to eight day old raw material.
as
The press capacity varies with the
freshness of the raw material and this capacity must be increased if the plants
are to process the raw material while fresh with full utilization of the rated
capacity.
It is well known that processing of fresh raw material ha s many
advantages, for instance better production quality (meal: special products,
oil: low FFA), lower losses of protein, lower oil consumption.
However, it has been demonstrated, especially in the processing of
capelin, that the production capacity drops so much when the raw material is
fresh that the advantages of processing it fresh are questionable. It has
therefore been of interest to demonstrate quantitatively what influence the
freshness of the raw material has on the production capacity for capelin.
SEC 5-25T (6 1 76)
--
../2
p. 12
- 2 -
Capacity Measurements at a Plant
In connection with an extensive material balance measurement program
at Je;vik Fish Meal and Oil Factory Ltd., Je;vik in the winter capelin season,
1974, the plant capacity for various stages of raw material freshness was
determined.
The plant was in regular use with usual production goals:
highest
possible capacity with a reasonable fat content in the meal.
Figure 1 shows how the production capacity varies with raw material
freshness (measured as volatile Nitrogen) and age from catch.
Figure 2 shows the reduction in capacity relative to the maximum
capacity with aged ("ripe") raw material expressed in percent.
It can be seen
that the capacity is highest at 160 mg. Vol. N. in the raw material (ca. 8-9
days). It is to be expected that the capacity will go down with older raw material (indicated with a dotted line in Figure 1).
Problems will then occur
in the liquid stage of the process, chiefly in the separators (heavy load and
problems in separating the fat).
The Capacity of the Press Varies With the Freshness of the Raw Material
The suppliers of the machinery have used so-called production-ripe
raw material as a basis for calculating their press capacity.
will not apply to fresh capelin.
This capacity
The exact reason for the reduction in press
capacity for fresh capelin is not known and is probably complicated to elucidate.
It is known that the protein in the raw material gradually ends up
more in the water phase (stickwater) than in the solids (press cake, sludge)
as the raw material ripens (ages).
This will only account for an 8% increase
•/3
to the press for two day old raW material as compared to seven to eight day old
The remaining difference
raw material.
(35% - 8% = 27%) must have another explana-
tion. It is to be expected that the difference in capacity must have a connection
with how well the press "takes" the material and the technical construction of
the press (sieve plates, volumes, etc.)
Processing of Fresh Capelin at Full Capacity Requires
Greater Press Capacity
The values determined from these trials cannot be given universal
validity without reservations.
Factors other than freshness of the raw material
can influence the press efficiency, but it is likely that the press capacity
should be increased by 25-50% in order to have full plant capacity with fresh
raw material. Another possibility is of course to increase or to utilize the
centrifuge capacity and let a larger part go to the centrifuges, thereby
diverting material from the press.
There is no reason to believe that the
raw material quality has any influence on the centrifuge capacity.
hl/dogn
hektoliters/day
4320
4080
3840
3600
3360
3120
40
60
9
3
80
4
100
5
120
6
' 140
7
160
8'
180
9
Figure 1 - Production Capacity at different raw material freshness
and age
200
10
fl.N ing;100g
dogn fra ['angst
Vol. N. mg/100 g
days from catch.
Capacity Reduction
Kapasitetsreduksjon i %
in %.
30
25
20
15
10
5
3
4
5
6
Fig. 2. Tid fra fangst opparbeiding.
Figure 2 — Time from catch to processing.
7 dogn
7 days