WASTEWATER
Effluent quality improves in lagoon systems that are operated in which configuration?
A. Parallel arrangement
B. Series arrangement
C. Anaerobic only
D. Aerobic only
Answer: B. Lagoons operated in series tend to produce higher-quality effluent as the waste stream passes from lagoon to lagoon. Series operation means the lagoon system piping is configured so that the influent of the second lagoon is the treated effluent of the first lagoon; the influent of the third lagoon is the treated effluent of the second lagoon, and so on. Lagoons operated in parallel essentially run side by side, and the influent wastewater is split equally to two or three lagoons; the outlets
