Evaluating the efficiency and temporal variation of pilot-scale constructed wetlands and steel slag phosphorus removing filters for treating dairy wastewater

Vivianite formation and its role in phosphorus retention in Lake Ørn, Denmark

“…restoration of thermally stratified lakes with anoxic bottom water by oxygenation can increase P i release rather than reduce it by bringing down the dissolved Fe 2+ concentration (Gachter and Muller, 2003). Hence, oxygenation can mobilize phosphate bound up as vivianite in lake sediments, in addition to waste water sludge, anoxic river sediments which receive treated sewage effluent, and constructed wetlands (Hearn et al 1983;Frossard et al 1997;Taylor and Boult, 2007;Lee et al 2010). High activities of Fe 2+ and P i , as well as low sulfide activity, are required to stabilize vivianite in most lacustrine ecosystems (Nembrini et al 1983;Manning et al 1999;Fagel et al 2005;Sapota et al 2006).…”

Effects of livestock wastewater variety and disinfectants on the performance of constructed wetlands in organic matters and nitrogen removal

“…treatment (Cronk 1996;Hunt and Poach 2001;Mankin and Ikenberry 2004;Harringtona and McInnesb 2009;Lee et al 2010). With typical configurations (surface CWs and subsurface CWs), average removal efficiencies of 65%, 53%, 48%, 42% and 42% were obtained for BOD 5 , TSS, NH 4 -N, TN and TP, respectively, were reported for livestock wastewater treatment (Knight et al 2000).…”

Performance of pond–wetland complexes as a preliminary processor of drinking water sources

“…The removal rates of major water quality indexes in SJY-CW varied linearly with temperature ( Table 3). The observed wetland removals may have different temperature dependence (Kadlec and Reddy, 2001;Lee et al, 2010). The increase rate of DO and removal rates of (Table 3), which provides more evidence of the role of temperature in determining the treatment efficiency of SJY-CW.…”

“…Characterized as cost-effective and eco-friendly, CWs have become popular worldwide for removing nutrients, organic matter, metals, pathogens, or other emerging pollutants from source/waste water (Mander and Mitsch, 2009;Fuchs et al, 2011;Zhang et al, 2015). Correspondingly, the performance of water quality improvement associated with nutrient and micropollutant attenuation in CWs has been extensively studied and documented (Reilly et al, 2000;Ayaz and Akça, 2001; Lee et al, 2010Lee et al, , 2014Kadlec et al, 2010Kadlec et al, , 2011García-Lledó et al, 2011;Zhang et al, 2014).…”