Ammonia removal from facultative pond effluents in a constructed wetland and an aerated rock filter: performance comparison in winter and summer.
The effluent from a facultative pond loaded at 80 kg BOD ha(-1) day(-1) was treated in a subsurface horizontal-flow aerated rock filter (RF) and a subsurface horizontal-flow constructed wetland (CW) planted with Typha latifolia. Over a 12-month monitoring period BOD and TSS removals were higher, and effluent ammonia concentrations lower, in the RF than in the CW (> 75% vs. 25-75%, and 3.6 mg N L(-1) vs. 6 mg N L(-1), respectively). However, the ammonia concentration was lower in the CW effluent than in the aerated RF effluent during mid-July to mid-September (1.1 mg N L(-1) vs. 2.2 mg N L(-1)), but in winter it was higher than the influent concentration. Overall the performance of the aerated RF was better and more consistent than that of the CW.
Johnson
Michelle L
ML
School of Civil Engineering, University of Leeds, United Kingdom.
Mara
D Duncan
DD
D000641:Ammonia / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D004526:Efficiency; D005374:Filtration; D005618:Fresh Water / Q000737:chemistry*; D009566:Nitrates / Q000302:isolation & purification; D012621:Seasons; D014865:Waste Disposal, Fluid / Q000379:methods*; D053833:Wetlands
D009566:Nitrates; D000641:Ammonia