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Frederik Hammes - One of the best experts on this subject based on the ideXlab platform.
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metagenomic characterization of biofilter microbial communities in a full scale Drinking Water Treatment plant
Water Research, 2018Co-Authors: Seungdae Oh, Frederik HammesAbstract:Abstract Microorganisms inhabiting filtration media of a Drinking Water Treatment plant can be beneficial, because they metabolize biodegradable organic matter from source Waters and those formed during disinfection processes, leading to the production of biologically stable Drinking Water. However, which microbial consortia colonize filters and what metabolic capacity they possess remain to be investigated. To gain insights into these issues, we performed metagenome sequencing and analysis of microbial communities in three different filters of a full-scale Drinking Water Treatment plant (DWTP). Filter communities were sampled from a rapid sand filter (RSF), granular activated carbon filter (GAC), and slow sand filter (SSF), and from the Schmutzdecke (SCM, a biologically active scum layer accumulated on top of SSF), respectively. Analysis of community phylogenetic structure revealed that the filter bacterial communities significantly differed from those in the source Water and final effluent communities, respectively. Network analysis identified a filter-specific colonization pattern of bacterial groups. Bradyrhizobiaceae were abundant in GAC, whereas Nitrospira were enriched in the sand-associated filters (RSF, SCM, and SSF). The GAC community was enriched with functions associated with aromatics degradation, many of which were encoded by Rhizobiales (∼30% of the total GAC community). Predicting minimum generation time (MGT) of prokaryotic communities suggested that the GAC community potentially select fast-growers (
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metagenomic characterization of biofilter microbial communities in a full scale Drinking Water Treatment plant
Water Research, 2018Co-Authors: Frederik Hammes, Wen Tso LiuAbstract:Microorganisms inhabiting filtration media of a Drinking Water Treatment plant can be beneficial, because they metabolize biodegradable organic matter from source Waters and those formed during disinfection processes, leading to the production of biologically stable Drinking Water. However, which microbial consortia colonize filters and what metabolic capacity they possess remain to be investigated. To gain insights into these issues, we performed metagenome sequencing and analysis of microbial communities in three different filters of a full-scale Drinking Water Treatment plant (DWTP). Filter communities were sampled from a rapid sand filter (RSF), granular activated carbon filter (GAC), and slow sand filter (SSF), and from the Schmutzdecke (SCM, a biologically active scum layer accumulated on top of SSF), respectively. Analysis of community phylogenetic structure revealed that the filter bacterial communities significantly differed from those in the source Water and final effluent communities, respectively. Network analysis identified a filter-specific colonization pattern of bacterial groups. Bradyrhizobiaceae were abundant in GAC, whereas Nitrospira were enriched in the sand-associated filters (RSF, SCM, and SSF). The GAC community was enriched with functions associated with aromatics degradation, many of which were encoded by Rhizobiales (∼30% of the total GAC community). Predicting minimum generation time (MGT) of prokaryotic communities suggested that the GAC community potentially select fast-growers (<15 h of MGT) among the four filter communities, consistent with the highest dissolved organic matter removal rate by GAC. Our findings provide new insights into the community phylogenetic structure, colonization pattern, and metabolic capacity that potentially contributes to organic matter removal achieved in the biofiltration stages of the full-scale DWTP.
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flow cytometry and adenosine tri phosphate analysis alternative possibilities to evaluate major bacteriological changes in Drinking Water Treatment and distribution systems
Water Research, 2012Co-Authors: Marius Vital, M Dignum, Aleksandra Magicknezev, P S Ross, L C Rietveld, Frederik HammesAbstract:Abstract An ever-growing need exists for rapid, quantitative and meaningful methods to quantify and characterize the effect of different Treatment steps on the microbiological processes and events that occur during Drinking Water Treatment and distribution. Here we compared cultivation-independent flow cytometry (FCM) and adenosine tri-phosphate (ATP) analysis with conventional cultivation-based microbiological methods, on Water samples from two full-scale Treatment and distribution systems. The two systems consist of nearly identical Treatment trains, but their raw Water quality and pre-Treatment differed significantly. All of the Drinking Water Treatment processes affected the microbiological content of the Water considerably, but once treated, the finished Water remained remarkably stable throughout the distribution system. Both the FCM and ATP data were able to describe the microbiology of the systems accurately, providing meaningful process data when combined with other parameters such as dissolved organic carbon analysis. Importantly, the results highlighted a complimentary value of the two independent methods: while similar trends were mostly observed, variations in ATP-per-cell values between Water samples were adequately explained by differences in the FCM fingerprints of the samples. This work demonstrates the value of alternative microbial methods for process/system control, optimization and routine monitoring of the general microbial quality of Water during Treatment and distribution.
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flow cytometric total bacterial cell counts as a descriptive microbiological parameter for Drinking Water Treatment processes
Water Research, 2008Co-Authors: Frederik Hammes, Michael Berney, Yingying Wang, Marius Vital, Oliver Koster, Thomas EgliAbstract:There are significantly more microbial cells in Drinking Water than what can be cultured on synthetic growth media. Nonetheless, cultivation-based heterotrophic plate counts (HPCs) are used worldwide as a general microbial quality parameter in Drinking Water Treatment and distribution. Total bacterial cell concentrations are normally not considered during Drinking Water Treatment as a design, operative or legislative parameters. This is mainly because easy and rapid methods for quantification of total bacterial cell concentrations have, up to now, not been available. As a consequence, the existing lack of data does not allow demonstrating the practical value of this parameter. In this study, we have used fluorescence staining of microbial cells with the nucleic acid stain SYBR((R)) Green I together with quantitative flow cytometry (FCM) to analyse total cell concentrations in Water samples from a Drinking Water pilot plant. The plant treats surface Water (Lake Zurich) through sequential ozonation, granular active carbon (GAC) filtration and membrane ultrafiltration (UF). The data were compared with adenosine tri-phosphate (ATP) measurements and conventional HPCs performed on the same Water samples. We demonstrated that the impact of all three major Treatment steps on the microbiology in the system could accurately be described with total cell counting: (1) ozonation caused chemical destruction of the bacterial cells; (2) GAC filtration facilitated significant regrowth of the microbial community; and (3) membrane UF physically removed the bacterial cells from the Water. FCM typically detected 1-2 log units more than HPC, while ATP measurements were prone to interference from extracellular ATP released during the ozonation step in the Treatment train. We have shown that total cell concentration measured with FCM is a rapid, easy, sensitive and importantly, a descriptive parameter of several widely applied Drinking Water Treatment processes.
Francesc Ventura - One of the best experts on this subject based on the ideXlab platform.
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occurrence and removal of pharmaceuticals and hormones through Drinking Water Treatment
Water Research, 2011Co-Authors: Maria Huertafontela, Maria Teresa Galceran, Francesc VenturaAbstract:The occurrence of fifty-five pharmaceuticals, hormones and metabolites in raw Waters used for Drinking Water production and their removal through a Drinking Water Treatment were studied. Thirty-five out of fifty-five drugs were detected in the raw Water at the facility intake with concentrations up to 1200 ng/L. The behavior of the compounds was studied at each step: prechlorination, coagulation, sand filtration, ozonation, granular activated carbon filtration and post-chlorination; showing that the complete Treatment accounted for the complete removal of all the compounds detected in raw Waters except for five of them. Phenytoin, atenolol and hydrochlorothiazide were the three pharmaceuticals most frequently found in finished Waters at concentrations about 10 ng/L. Sotalol and carbamazepine epoxide were found in less than a half of the samples at lower concentrations, above 2 ng/L. However despite their persistence, the removals of these five pharmaceuticals were higher than 95%.
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stimulatory drugs of abuse in surface Waters and their removal in a conventional Drinking Water Treatment plant
Environmental Science & Technology, 2008Co-Authors: Maria Huertafontela, Maria Teresa Galceran, Francesc VenturaAbstract:The presence of psychoactive stimulatory drugs in raw Waters used for Drinking Water production and in finished Drinking Water was evaluated in a Spanish Drinking Water Treatment plant (DWTP). Contamination of the river basin which provides raw Water to this DWTP was also studied. In surface Waters, illicit drugs such as cocaine, benzoylecgonine (cocaine metabolite), amphetamine, methamphetamine, MDMA (ecstasy), and MDA were detected at mean concentrations ranging from 4 to 350 ng/L. Nicotine, caffeine, and their metabolites were also found at the μg/L level. The elimination of these compounds during Drinking Water Treatment was investigated in a real Waterworks. Amphetamine-type stimulants (except MDMA) were completely removed during prechlorination, flocculation, and sand filtration steps, yielding concentrations lower than their limits of detection (LODs). Further, ozone Treatment was shown to be effective in partially eliminating caffeine (76%), while subsequent granulated activated carbon (GAC) filtr...
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stimulatory drugs of abuse in surface Waters and their removal in a conventional Drinking Water Treatment plant
Environmental Science & Technology, 2008Co-Authors: Maria Huertafontela, Maria Teresa Galceran, Francesc VenturaAbstract:The presence of psychoactive stimulatory drugs in raw Waters used for Drinking Water production and in finished Drinking Water was evaluated in a Spanish Drinking Water Treatment plant (DWTP). Contamination of the river basin which provides raw Water to this DWTP was also studied. In surface Waters, illicit drugs such as cocaine, benzoylecgonine (cocaine metabolite), amphetamine, methamphetamine, MDMA (ecstasy), and MDA were detected at mean concentrations ranging from 4 to 350 ng/L. Nicotine, caffeine, and their metabolites were also found at the microg/L level. The elimination of these compounds during Drinking Water Treatment was investigated in a real Waterworks. Amphetamine-type stimulants (except MDMA) were completely removed during prechlorination, flocculation, and sand filtration steps, yielding concentrations lowerthan their limits of detection (LODs). Further, ozone Treatment was shown to be effective in partially eliminating caffeine (76%), while subsequent granulated activated carbon (GAC) filtration removed cocaine (100%), MDMA(88%), benzoylecgonine (72%), and cotinine (63%). Postchlorination achieved the complete elimination of cocaine and nicotine and only one parent compound (caffeine) and two metabolites (cotinine and benzoylecgonine) persisted throughout Treatment although reductions of 90% for caffeine and benzoylecgonine and 74% for cotinine were obtained.
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rejection of pharmaceuticals in nanofiltration and reverse osmosis membrane Drinking Water Treatment
Water Research, 2008Co-Authors: Jelena Radjenovic, Mira Petrovic, Francesc VenturaAbstract:Abstract This paper investigates the removal of a broad range of pharmaceuticals during nanofiltration (NF) and reverse osmosis (RO) applied in a full-scale Drinking Water Treatment plant (DWTP) using groundWater. Pharmaceutical residues detected in groundWater used as feed Water in all five sampling campaigns were analgesics and anti-inflammatory drugs such as ketoprofen, diclofenac, acetaminophen and propyphenazone, β-blockers sotalol and metoprolol, an antiepileptic drug carbamazepine, the antibiotic sulfamethoxazole, a lipid regulator gemfibrozil and a diuretic hydrochlorothiazide. The highest concentrations in groundWater were recorded for hydrochlorothiazide (58.6–2548 ng L−1), ketoprofen ( 85%). Deteriorations in retentions on NF and RO membranes were observed for acetaminophen (44.8–73 %), gemfibrozil (50–70 %) and mefenamic acid (30–50%). Furthermore, since several pharmaceutical residues were detected in the brine stream of NF and RO processes at concentrations of several hundreds nanogram per litre, its disposal to a near-by river can represent a possible risk implication of this type of Treatment.
Benoit Barbeau - One of the best experts on this subject based on the ideXlab platform.
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biological ion exchange as an alternative to biological activated carbon for Drinking Water Treatment
Water Research, 2020Co-Authors: Kim Maren Lompe, Sebastien Sauve, Madjid Mohseni, Pierre R Berube, Benoit BarbeauAbstract:Abstract Biological ion exchange (BIEX) has proved to remove natural organic matter (NOM) better than biological activated carbon (BAC). This raises the question if BIEX can be integrated into a full-scale Drinking Water Treatment plant to remove NOM and ammonia. In this study, a pilot plant consisting of one BIEX filter, three GAC filters and one BAC filter was set up as second-stage filtration at the Sainte-Rose Drinking Water Treatment plant (Laval, Canada). The pilot plant was operated for a period of nine months without regeneration of the ion exchange resins. The influent Water showed low DOC (2.5 mg/L) and high sulfate concentrations (28.2 mg/L). Except of a short peak of DOC released at about 1 000 BV, the BIEX filter achieved a nearly constant removal of 29–36% over the whole study period. The DOC removals of GAC were similar to BIEX at
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ozone oxidation of pharmaceuticals endocrine disruptors and pesticides during Drinking Water Treatment
Water Research, 2009Co-Authors: Romain Broseus, Simon Vincent, Khadija Aboulfadl, Atlasi Daneshvar, Sebastien Sauve, Benoit Barbeau, Michele PrevostAbstract:This study investigates the oxidation of pharmaceuticals, endocrine disrupting compounds and pesticides during ozonation applied in Drinking Water Treatment. In the first step, second-order rate constants for the reactions of selected compounds with molecular ozone (k(O3)) were determined in bench-scale experiments at pH 8.10: caffeine (650+/-22M(-1)s(-1)), progesterone (601+/-9M(-1)s(-1)), medroxyprogesterone (558+/-9M(-1)s(-1)), norethindrone (2215+/-76M(-1)s(-1)) and levonorgestrel (1427+/-62M(-1)s(-1)). Compared to phenolic estrogens (estrone, 17beta-estradiol, estriol and 17alpha-ethinylestradiol), the selected progestogen endocrine disruptors reacted far slower with ozone. In the second part of the study, bench-scale experiments were conducted with surface Waters spiked with 16 target compounds to assess their oxidative removal using ozone and determine if bench-scale results would accurately predict full-scale removal data. Overall, the data provided evidence that ozone is effective for removing trace organic contaminants from Water with ozone doses typically applied in Drinking Water Treatment. Ozonation removed over 80% of caffeine, pharmaceuticals and endocrine disruptors within the CT value of about 2 mg min L(-1). As expected, pesticides were found to be the most recalcitrant compounds to oxidize. Caffeine can be used as an indicator compound to gauge the efficacy of ozone Treatment.
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ozone oxidation of pharmaceuticals endocrine disruptors and pesticides during Drinking Water Treatment
Water Research, 2009Co-Authors: Romain Broseus, Simon Vincent, Khadija Aboulfadl, Atlasi Daneshvar, Sebastien Sauve, Benoit Barbeau, Michele PrevostAbstract:Abstract This study investigates the oxidation of pharmaceuticals, endocrine disrupting compounds and pesticides during ozonation applied in Drinking Water Treatment. In the first step, second-order rate constants for the reactions of selected compounds with molecular ozone ( k O 3 ) were determined in bench-scale experiments at pH 8.10: caffeine (650 ± 22 M−1 s−1), progesterone (601 ± 9 M−1 s−1), medroxyprogesterone (558 ± 9 M−1 s−1), norethindrone (2215 ± 76 M−1 s−1) and levonorgestrel (1427 ± 62 M−1 s−1). Compared to phenolic estrogens (estrone, 17β-estradiol, estriol and 17α-ethinylestradiol), the selected progestogen endocrine disruptors reacted far slower with ozone. In the second part of the study, bench-scale experiments were conducted with surface Waters spiked with 16 target compounds to assess their oxidative removal using ozone and determine if bench-scale results would accurately predict full-scale removal data. Overall, the data provided evidence that ozone is effective for removing trace organic contaminants from Water with ozone doses typically applied in Drinking Water Treatment. Ozonation removed over 80% of caffeine, pharmaceuticals and endocrine disruptors within the CT value of about 2 mg min L−1. As expected, pesticides were found to be the most recalcitrant compounds to oxidize. Caffeine can be used as an indicator compound to gauge the efficacy of ozone Treatment.
Michele Prevost - One of the best experts on this subject based on the ideXlab platform.
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ozone oxidation of pharmaceuticals endocrine disruptors and pesticides during Drinking Water Treatment
Water Research, 2009Co-Authors: Romain Broseus, Simon Vincent, Khadija Aboulfadl, Atlasi Daneshvar, Sebastien Sauve, Benoit Barbeau, Michele PrevostAbstract:This study investigates the oxidation of pharmaceuticals, endocrine disrupting compounds and pesticides during ozonation applied in Drinking Water Treatment. In the first step, second-order rate constants for the reactions of selected compounds with molecular ozone (k(O3)) were determined in bench-scale experiments at pH 8.10: caffeine (650+/-22M(-1)s(-1)), progesterone (601+/-9M(-1)s(-1)), medroxyprogesterone (558+/-9M(-1)s(-1)), norethindrone (2215+/-76M(-1)s(-1)) and levonorgestrel (1427+/-62M(-1)s(-1)). Compared to phenolic estrogens (estrone, 17beta-estradiol, estriol and 17alpha-ethinylestradiol), the selected progestogen endocrine disruptors reacted far slower with ozone. In the second part of the study, bench-scale experiments were conducted with surface Waters spiked with 16 target compounds to assess their oxidative removal using ozone and determine if bench-scale results would accurately predict full-scale removal data. Overall, the data provided evidence that ozone is effective for removing trace organic contaminants from Water with ozone doses typically applied in Drinking Water Treatment. Ozonation removed over 80% of caffeine, pharmaceuticals and endocrine disruptors within the CT value of about 2 mg min L(-1). As expected, pesticides were found to be the most recalcitrant compounds to oxidize. Caffeine can be used as an indicator compound to gauge the efficacy of ozone Treatment.
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ozone oxidation of pharmaceuticals endocrine disruptors and pesticides during Drinking Water Treatment
Water Research, 2009Co-Authors: Romain Broseus, Simon Vincent, Khadija Aboulfadl, Atlasi Daneshvar, Sebastien Sauve, Benoit Barbeau, Michele PrevostAbstract:Abstract This study investigates the oxidation of pharmaceuticals, endocrine disrupting compounds and pesticides during ozonation applied in Drinking Water Treatment. In the first step, second-order rate constants for the reactions of selected compounds with molecular ozone ( k O 3 ) were determined in bench-scale experiments at pH 8.10: caffeine (650 ± 22 M−1 s−1), progesterone (601 ± 9 M−1 s−1), medroxyprogesterone (558 ± 9 M−1 s−1), norethindrone (2215 ± 76 M−1 s−1) and levonorgestrel (1427 ± 62 M−1 s−1). Compared to phenolic estrogens (estrone, 17β-estradiol, estriol and 17α-ethinylestradiol), the selected progestogen endocrine disruptors reacted far slower with ozone. In the second part of the study, bench-scale experiments were conducted with surface Waters spiked with 16 target compounds to assess their oxidative removal using ozone and determine if bench-scale results would accurately predict full-scale removal data. Overall, the data provided evidence that ozone is effective for removing trace organic contaminants from Water with ozone doses typically applied in Drinking Water Treatment. Ozonation removed over 80% of caffeine, pharmaceuticals and endocrine disruptors within the CT value of about 2 mg min L−1. As expected, pesticides were found to be the most recalcitrant compounds to oxidize. Caffeine can be used as an indicator compound to gauge the efficacy of ozone Treatment.
Seungdae Oh - One of the best experts on this subject based on the ideXlab platform.
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metagenomic characterization of biofilter microbial communities in a full scale Drinking Water Treatment plant
Water Research, 2018Co-Authors: Seungdae Oh, Frederik HammesAbstract:Abstract Microorganisms inhabiting filtration media of a Drinking Water Treatment plant can be beneficial, because they metabolize biodegradable organic matter from source Waters and those formed during disinfection processes, leading to the production of biologically stable Drinking Water. However, which microbial consortia colonize filters and what metabolic capacity they possess remain to be investigated. To gain insights into these issues, we performed metagenome sequencing and analysis of microbial communities in three different filters of a full-scale Drinking Water Treatment plant (DWTP). Filter communities were sampled from a rapid sand filter (RSF), granular activated carbon filter (GAC), and slow sand filter (SSF), and from the Schmutzdecke (SCM, a biologically active scum layer accumulated on top of SSF), respectively. Analysis of community phylogenetic structure revealed that the filter bacterial communities significantly differed from those in the source Water and final effluent communities, respectively. Network analysis identified a filter-specific colonization pattern of bacterial groups. Bradyrhizobiaceae were abundant in GAC, whereas Nitrospira were enriched in the sand-associated filters (RSF, SCM, and SSF). The GAC community was enriched with functions associated with aromatics degradation, many of which were encoded by Rhizobiales (∼30% of the total GAC community). Predicting minimum generation time (MGT) of prokaryotic communities suggested that the GAC community potentially select fast-growers (
