9420.pdf

it to all processing steps. Make-up water is added as needed. Concurrent recycling
collects water at a point downstream in the processing scheme, treats it in-line, if
necessary, and recycles the water upstream to a less clean portion of the operation.
Modular recycling separately treats and recycles water at specific processing steps
(Gates, 1991);
A major factor in implementing water conservation is employee education and training.
6.3 Waste Stream Separation
The major waste streams generated at a fish processing facility are process water,
sanitary sewage, and cooling water (optional). While these two/three streams are
generally separated at most existing facilities in B. C., separation of different process water
waste streams is strongly recommended. Together with water conservation, separation
of process water waste streams in a major factor in achieving a reduction in contaminant
loadings.
The major measures in waste stream separation include:
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dry transport of offal;
immediate separation of offal and product from process water using dewatering
belts;
avoidance of bloodwater seepage from offal hoppers, or collection of this waste
stream;
installation of pans under tables to collect dripping blood for subsequent discharge
to the offal hopper;
installation of trays under conveyor belts to catch solids before they fall on the
floor;
installation of chutes to direct offal to the offal handling system and to avoid the
accumulation of offal on the floor;
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collection of offal in non-leaking containers;
use of pumps designed to reduce break-up and, therefore, solubilization of solids;
screening process wastewater prior to pumping;
use of vacuum suction for gurry collection;
use of sex sorters in roe herring processing;
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