Globally, the use of antimicrobials in veterinary and human medicine has become widespread (annual consumption of
100000–200000 t) (Homem and Santos, 2011), and the overuse and misuse of antimicrobials has attracted considerable attention.One aspect of this is their fate when entering municipal waste water systems. Although the concentration of antimicrobials in municipal wastewater is generally low, their accumulation and persistence in the environment raise concerns that they may have a harmful influence on human health and the ecosystem (Kummerer, 2009).