High-rate overland flow

Performance of an overland flow system for advanced treatment of wastewater plant effluent

“…The performance of OF systems has also been studied by numerous investigators (Abernathy et al, 1985;Overman and Wolfe, 1989;Surampalli et al, 1996;Turner et al, 1994;Tyrrel et al, 2002;Wightman et al, 1983;Zirschky et al, 1989). Performance data obtained from these studies indicate the system can achieve greater than 90% reduction of BOD 5 and total suspended solids (TSS), and 70-90% reduction of nitrogen.…”

“…Turner et al (1994) in Garland, TX, examined phosphorous removal from secondary effluent using OF and found the highest level of 77% during the summer and 52% during the winter season. In Hyrum, UT, Wightman et al (1983) evaluated the performance of an OF system and found reductions of 87-93% for BOD 5 and 91-95% for TSS. In Garland, TX, Zirschky et al (1989) observed that the OF process removed up to 97% of ammonia from secondary effluent.…”