Wastewater Characterization of Fish Processing Plant Effluents

fact that the pump rate of two pumps pumping into the same pipe is less than the sum of the pump
rates of the individual pumps.
It has been the project team's experience that estimating the effluent volume based on the water
consumption is the most inaccurate of the three methods. The problem with this method is that the
actual effluent flow is not measured, as is the case for the other two methods. However, this
method does comply with provincial permit requirements. Where the flows measured exceed permit
flows, the facility may wish to introduce more accurate means of measurement. Its primary
drawback is that loading estimate may be inaccurate (high).
Some of the factors affecting the accuracy of this flow measurement technique are listed below:
1. Discharge of water not measured by water meter:
- Vessel hold water;
- Melt water from ice delivered together with frozen fish; and
- Storm water (if collected and discharged together with process effluent).
2. Metered water not discharged together with process effluent, such as water used:
- For ice making (for shipping of frozen fish);
- As cooling water (if separate outfall); and
- For sanitary use.
FREMP 03/21/1994
Fish Processing Plant Effluent 23