Capability of microalgae-based wastewater treatment systems to remove emerging organic contaminants: A pilot-scale study

JOURNAL OF HAZARDOUS MATERIALS

卷:288

Article

Matamoros, Victor¹  Gutierrez, Raquel²  Ferrer, Ivet²  Garcia, Joan²  Bayona, Josep M.¹ 

[1] CSIC, IDAEA, Dept Environm Chem, E-08034 Barcelona, Spain

[2] Univ Politecn Catalunya BarcelonaTech, Dept Hydraul Maritime & Environm Engn, GEMMA Grp Environm Engn & Microbiol, E-08034 Barcelona, Spain

关键词: Emerging organic contaminants;    Microalgae;    High-rate algal pond;    Photodegradation;    Biodegradation;    Volatilization;   

DOI  :  10.1016/j.jhazmat.2015.02.002

来源: Elsevier

【 摘 要 】

The effect of hydraulic retention time (HRT) and seasonality on the removal efficiency of 26 organic microcontaminants from urban wastewater was studied in two pilot high-rate algal ponds (HRAPs). The targeted compounds included pharmaceuticals and personal care products, fire retardants, surfactants, anticorrosive agents, pesticides and plasticizers, among others. The pilot plant, which was fed at a surface loading rate of 7-29 g of COD m(-2) d(-1), consisted of a homogenisation tank and two parallel lines, each one with a primary settler and an HRAP with a surface area of 1.5 m(2) and a volume of 0.5 m(3). The two HRAPs were operated with different HRTs (4 and 8 d). The removal efficiency ranged from negligible removal to more than 90% depending on the compound. Microcontaminant removal efficiencies were enhanced during the warm season, while the HRT effect on microcontaminant removal was only noticeable in the cold season. Our results suggest that biodegradation and photodegradation are the most important removal pathways, whereas volatilization and sorption were solely achieved for hydrophobic compounds (log Row >4) with a moderately high Henry's law constant values (11-12 Pa m(-3) mol(-1)) such as musk fragrances. Whereas acetaminophen, ibuprofen and oxybenzone presented ecotoxicological hazard quotients (HQs) higher than 1 in the influent wastewater samples, the HQs for the effluent water samples were always below 1. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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