ABSTRACT
Changes in the basic approach to the design of pond systems in the past 20 years have been limited primarily to the introduction of floating plastic partitions to improve the hydraulic characteristics of the pond system, modifications to basic designs, incorporating rational multivariate growth kinetics (Middlebrooks and Procella 1971), and the development of a wider selection of more efficient aeration equipment. Several modifications of complete-mix and partial-mix combinations have been developed and evaluated, but the basic design concepts are unchanged. Examples of these modifications are the BIOLAC® processes, the Rich aerated lagoon design procedures, and the LemTec™ biological treatment process. These among other modifications are described in this chapter.
