In order to comply with regulatory requirements, the wastewater treatment
facility was constructed in conjunction with the processing plant in April,
1975, and a water quality monitoring program was initiated in September,
1975, to evaluate its performance. The treatment facility consists of an
extended aeration system and two identical aerobic polishing ponds. The
rational used for the design of the treatment facility was based on literature
review and characteristics of the waste as determined by daily grab
samples. The literature review was limited since very little has been
published on the characteristics of salmon processing wastes. The EPA
effluent guidelines for salmon processing wastes were also developed based
on this same small data base. The objectives of this study were to evaluate
the EPA recommended effluent limitation guidelines with respect to the
extended aeration treatment process and to develop more reliable design
criteria.