ABSTRACT
This chapter presents the procedure and the rationale behind the procedure used to design a continuously –fed, intermittently aerated, settled and discharged activated sludge facility to treat a combined municipal and packing house wastewater. Preliminary evaluations of one conventional and two innovative biological treatment processes were conducted in early 1983. Pretreatment is provided prior to discharge into the municipal sewer system by a grease removal unit and a 4.5 acre anaerobic lagoon with an average depth of nine feet. The comparison of the three technologies indicated that the continuously-fed, intermittently-operated, activated sludge system could meet all of the technical criteria for process selection and could provide the lowest life cycle cost. If jet aeration systems are used for aeration and mixing, special care must be taken in sizing influent wastewater bar screens and in designing recirculation pump suction inlets.
