Occurrence and removal of selected organic micropollutants at mechanical, chemical and advanced wastewater treatment plants in Norway

Analysis of Phthalate and Priority Phenols from a Wastewater Treatment Plant in Cape Town, South Africa

“…DEP was the most abundant phthalate (796µgL -1 ) followed by DBP (123µgL -1 ) and DEHP (57µgL -1 ). The occurrence pattern of phthalates in raw and final effluent differs from previous work where DEHP is reported to be higher than other phthalates [20,21,22]. However, the result is in tandem with the study of Oliver et al (2005) where DEP was reported higher than other phthalates in primary tank [23].…”

The behaviors and fate of polycyclic aromatic hydrocarbons (PAHs) in a coking wastewater treatment plant

“…Removal efficiencies for all the studied compounds, greater than 97%, were achieved in this wastewater treatment process. Although the concentrations of PAHs in the influent were higher, the overall removal efficiency in this coking WWTP was much higher than those found in conventional WWTPs (Pham and Proulx, 1997;Vogelsang et al, 2006;Fatone et al, 2011). This coking WWTP was operated under comparatively high temperatures during sampling period (24-26°C), long solids retention time (30-180 d), fluidized movement of sludge and high transfer efficiency of dissolved oxygen in fluidized-bed, which would be favorable to the removal of organic compounds.…”

“…Although, the removal and fate of PAHs in municipal WWTPs have been extensively studied (Pham and Proulx, 1997;Manoli and Samara, 1999;Vogelsang et al, 2006;Fatone et al, 2011), there are very limited studies reported in the literature about these compounds in coking WWTPs (Miller, 1980;Walters and Luthy, 1984), which is much more complicated than the municipal wastewaters because of coming directly from the production of coke at high temperature, the purification of coal gas and the recovery of chemical products, and containing considerable amounts of phenols, polycyclic nitrogen-containing aromatics, oxygen-and sulfur-containing heterocyclic and acyclic compounds (Zhang et al, 1998;Blanchard et al, 2004). Among these available studies, the focuses were mainly on the occurrence and distribution of these compounds in coking wastewater, not including their behaviors and fate (e.g., the concentrations of PAHs in various phase states at different stages).…”

Occurrence, behavior and removal of typical substituted and parent polycyclic aromatic hydrocarbons in a biological wastewater treatment plant

“…As is known that PAH is a type of ubiquitous pollutant in WWTPs (Pham and Proulx, 1997;Manoli and Samara, 1999;Busetti et al, 2006;Vogelsang et al, 2006). Previous studies have well documented the removal efficiencies and potential mechanisms of PAHs during biological treatment processes.…”