Caffeine 2 Drug products 2 Wastewater treatment 2 emerging pollutants Acetylsalicylic acids 1 Activated sludge process 1 Article 1 Biochemical engineering 1 Biological water treatment 1 Chemical industry 1 Chemical pre-treatment 1 Conventional activated sludges 1 Degradation 1 Degradation efficiency 1 Denitrification 1 Denitrifying microorganisms 1 Efficiency 1 Emerging pollutants 1 Ketoprofen 1 Micro-contaminants 1 Municipal wastewater treatment plants 1 Naproxens 1 Nitrification 1 Nitrification and denitrification 1 Nitrogen removal 1 Pharmaceutical and personal care products 1 Physiological models 1 Physiological response 1 Plant species 1 Removal mechanism 1