Partial-mix aerated pond
Storage and controlled-
discharge ponds Hyacinth ponds
Secondary Secondary, polishing Secondary, storage, polishing Secondary
AWT, with secondary input
Warm None None None Warm Warm
Detention Time (days)
3-5; 1-1.5 5-8; 1.5-2.5 6.5-20; 2-6 10-16; 3-5 <5; <1.5 <3; <1
Organic Loading (lb/ac-d; kg/ha-d)
Effluent Characteristics (mg/L)
BOD, 20-40 TSS,80-140 BOD, 30-40 TSS,40-100 BOD, 30-40 TSS,30-60 BOD, 10-30 TSS,10-40 BOD, <30 TSS,<30 BOD, <10 TSS,<10 TP, <5 TN, <5
a First cell in system designed as a facultative or aerated treatment unit.
Note: AWT, advanced water treatment; BOD, biological oxygen demand; TSS, total suspended solids; TP, total phosphorus; TN, total nitrogen. Source: Data from Banks and Davis (1983), Middlebrooks et al. (1981), and USEPA (1983).
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