First Sentence

"process design chapters to distinguish between lagoon and pond systems, which depend on microbial life and the lower forms of plants and animals and are discussed in Chap. 4, in contrast to aquatic systems, which also utilize the higher plants and animals and are discussed in Chap. 5. In most of the pond systems listed in Table 1.1, both performance and final water quality depend on the algae present in the system."