Biodegradation of ibuprofen, diclofenac and carbamazepine in nitrifying activated sludge under 12 degrees C temperature conditions

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@article{58c2e1ff7e8a4d03a2be1c6cddcd352a,
title = "Biodegradation of ibuprofen, diclofenac and carbamazepine in nitrifying activated sludge under 12 degrees C temperature conditions",
abstract = "Pharmaceuticals constitute a well-known group of emerging contaminants with an increasing significance in water pollution. This study focuses on three pharmaceuticals extensively used in Finland and which can be found in environmental waters: ibuprofen, diclofenac and carbamazepine. Biodegradation experiments were conducted in a full-scale Wastewater Treatment Plant (WWTP) and in laboratory-scale Sequencing Batch Reactors (SBRs). The SBRs were operated at 12 degrees C, with a sludge retention time (SRT) 10-12 d and organic loading rates (OLRs) of 0.17, 0.27 and 0.33 kg BOD7 m(-3)d(-1). Ibuprofen was found to biodegrade up to 99{\%}. The biodegradation rate constants (k(biol)) for ibuprofen were calculated for full-scale and laboratory processes as well as under different laboratory conditions and found to differ from 0.9 up to 5.0 l g(ss)(-1) d(-1). Diclofenac demonstrated an unexpected immediate drop of concentration in three SBRs and partial recovery of the initial concentration in one of the reactors. High fluctuating in diclofenac concentration was presumably caused by removal of this compound under different concentrations of nitrites during development of nitrifying activated sludge. Carbamazepine showed no biodegradation in all the experiments. (C) 2014 Elsevier B.V. All rights reserved.",
keywords = "Biodegradation rate constant (k(biol)), Carbamazepine, Diclofenac, Ibuprofen, Organic loading rate (OLR), WASTE-WATER TREATMENT, SEWAGE-TREATMENT PLANTS, PHARMACEUTICAL RESIDUES, TRANSFORMATION PRODUCTS, DENITRIFYING CONDITIONS, BIOLOGICAL DEGRADATION, AQUATIC ENVIRONMENT, MEMBRANE BIOREACTOR, BATCH EXPERIMENTS, BIOFILM REACTORS",
author = "Antonina Kruglova and Pia Ahlgren and Nasti Korhonen and Pirjo Rantanen and Anna Mikola and Riku Vahala",
year = "2014",
month = "11",
day = "15",
doi = "10.1016/j.scitotenv.2014.08.069",
language = "English",
volume = "499",
pages = "394--401",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier Science B.V.",

}

RIS - Lataa

TY - JOUR

T1 - Biodegradation of ibuprofen, diclofenac and carbamazepine in nitrifying activated sludge under 12 degrees C temperature conditions

AU - Kruglova, Antonina

AU - Ahlgren, Pia

AU - Korhonen, Nasti

AU - Rantanen, Pirjo

AU - Mikola, Anna

AU - Vahala, Riku

PY - 2014/11/15

Y1 - 2014/11/15

N2 - Pharmaceuticals constitute a well-known group of emerging contaminants with an increasing significance in water pollution. This study focuses on three pharmaceuticals extensively used in Finland and which can be found in environmental waters: ibuprofen, diclofenac and carbamazepine. Biodegradation experiments were conducted in a full-scale Wastewater Treatment Plant (WWTP) and in laboratory-scale Sequencing Batch Reactors (SBRs). The SBRs were operated at 12 degrees C, with a sludge retention time (SRT) 10-12 d and organic loading rates (OLRs) of 0.17, 0.27 and 0.33 kg BOD7 m(-3)d(-1). Ibuprofen was found to biodegrade up to 99%. The biodegradation rate constants (k(biol)) for ibuprofen were calculated for full-scale and laboratory processes as well as under different laboratory conditions and found to differ from 0.9 up to 5.0 l g(ss)(-1) d(-1). Diclofenac demonstrated an unexpected immediate drop of concentration in three SBRs and partial recovery of the initial concentration in one of the reactors. High fluctuating in diclofenac concentration was presumably caused by removal of this compound under different concentrations of nitrites during development of nitrifying activated sludge. Carbamazepine showed no biodegradation in all the experiments. (C) 2014 Elsevier B.V. All rights reserved.

AB - Pharmaceuticals constitute a well-known group of emerging contaminants with an increasing significance in water pollution. This study focuses on three pharmaceuticals extensively used in Finland and which can be found in environmental waters: ibuprofen, diclofenac and carbamazepine. Biodegradation experiments were conducted in a full-scale Wastewater Treatment Plant (WWTP) and in laboratory-scale Sequencing Batch Reactors (SBRs). The SBRs were operated at 12 degrees C, with a sludge retention time (SRT) 10-12 d and organic loading rates (OLRs) of 0.17, 0.27 and 0.33 kg BOD7 m(-3)d(-1). Ibuprofen was found to biodegrade up to 99%. The biodegradation rate constants (k(biol)) for ibuprofen were calculated for full-scale and laboratory processes as well as under different laboratory conditions and found to differ from 0.9 up to 5.0 l g(ss)(-1) d(-1). Diclofenac demonstrated an unexpected immediate drop of concentration in three SBRs and partial recovery of the initial concentration in one of the reactors. High fluctuating in diclofenac concentration was presumably caused by removal of this compound under different concentrations of nitrites during development of nitrifying activated sludge. Carbamazepine showed no biodegradation in all the experiments. (C) 2014 Elsevier B.V. All rights reserved.

KW - Biodegradation rate constant (k(biol))

KW - Carbamazepine

KW - Diclofenac

KW - Ibuprofen

KW - Organic loading rate (OLR)

KW - WASTE-WATER TREATMENT

KW - SEWAGE-TREATMENT PLANTS

KW - PHARMACEUTICAL RESIDUES

KW - TRANSFORMATION PRODUCTS

KW - DENITRIFYING CONDITIONS

KW - BIOLOGICAL DEGRADATION

KW - AQUATIC ENVIRONMENT

KW - MEMBRANE BIOREACTOR

KW - BATCH EXPERIMENTS

KW - BIOFILM REACTORS

U2 - 10.1016/j.scitotenv.2014.08.069

DO - 10.1016/j.scitotenv.2014.08.069

M3 - Article

VL - 499

SP - 394

EP - 401

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -

ID: 9770707