Influence of load distribution and recycle rate in step-fed facultative ponds .

Presents the results of research on a wastewater treatment system with four identical facultative ponds in series with step-feeding and recirculation (SFFPR). Research of four modes of distribution of the influent; How the four ponds were homogeneous; Findings that the ponds receiving the highest loading showed a bacterial biomass higher than that of the primary production.