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Dr. Maria João Rosa
Water Quality and Treatment Laboratory, Urban Water Unit, Hydraulics and Environment Department, LNEC—National Civil Engineering Laboratory, Lisbon, Portugal

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Research Keywords & Expertise

0 Energy Efficiency
0 Resource Recovery
0 Water quality, treatment, and reuse
0 Advanced treatments
0 Control of emerging pollutants

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Energy Efficiency
Water quality, treatment, and reuse

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Journal article
Published: 11 March 2021 in Microorganisms
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Wastewater treatment plants (WWTPs) are significant reservoirs of bacterial resistance. This work aims to identify the determinants of resistance produced by Gram-negative bacteria in the influent and effluent of two WWTPs in Portugal. A total of 96 wastewater samples were obtained between 2016 and 2019. The numbers of total aerobic and fecal contamination bacteria were evaluated, and genomic features were searched by polymerase chain reaction (PCR) and Next-Generation Sequencing (NGS). Enterobacteriaceae corresponded to 78.6% (n = 161) of the 205 isolates identified by 16sRNA. The most frequent isolates were Escherichia spp. (57.1%, n = 117), followed by Aeromonas spp. (16.1%, n = 33) and Klebsiella spp. (12.7%, n = 26). The remaining 29 isolates (14.1%) were distributed across 10 different genera. Among the 183 resistant genes detected, 54 isolates produced extended spectrum β-lactamases (ESBL), of which bla CTX-M-15 was predominant (37 isolates; 68.5%). A KPC-3 carbapenemase-producing K. oxytoca was identified (n = 1), with bla KPC-3 included in a transposon Tn4401 isoform b. A higher number of virulence genes (VG) (19 genes) was found in the E. coli 5301 (O25b-ST131-B2) isolate compared with a commensal E. coli 5281 (O25b-ST410-A) (six genes). Both shared five VG [Enterobactin; Aerobactin, CFA/1 (clade α); Type1 (clade γ1); Type IV]. In conclusion, this work highlights the role of relevant clinical bacteria in WWTPs, such as KPC-3-producing K. oxytoca, and, for the first time, a CTX-M-15-producing Ochromobactrum intermedium, a human opportunistic pathogen, and a SED-1-producing Citrobacter farmeri, an uncommon CTX-M-type extended-spectrum beta-lactamase.

ACS Style

Elsa Mesquita; Rita Ribeiro; Carla Silva; Rita Alves; Rita Baptista; Sílvia Condinho; Maria Rosa; João Perdigão; Cátia Caneiras; Aida Duarte. An Update on Wastewater Multi-Resistant Bacteria: Identification of Clinical Pathogens Such as Escherichia coli O25b:H4-B2-ST131-Producing CTX-M-15 ESBL and KPC-3 Carbapenemase-Producing Klebsiella oxytoca. Microorganisms 2021, 9, 576 .

AMA Style

Elsa Mesquita, Rita Ribeiro, Carla Silva, Rita Alves, Rita Baptista, Sílvia Condinho, Maria Rosa, João Perdigão, Cátia Caneiras, Aida Duarte. An Update on Wastewater Multi-Resistant Bacteria: Identification of Clinical Pathogens Such as Escherichia coli O25b:H4-B2-ST131-Producing CTX-M-15 ESBL and KPC-3 Carbapenemase-Producing Klebsiella oxytoca. Microorganisms. 2021; 9 (3):576.

Chicago/Turabian Style

Elsa Mesquita; Rita Ribeiro; Carla Silva; Rita Alves; Rita Baptista; Sílvia Condinho; Maria Rosa; João Perdigão; Cátia Caneiras; Aida Duarte. 2021. "An Update on Wastewater Multi-Resistant Bacteria: Identification of Clinical Pathogens Such as Escherichia coli O25b:H4-B2-ST131-Producing CTX-M-15 ESBL and KPC-3 Carbapenemase-Producing Klebsiella oxytoca." Microorganisms 9, no. 3: 576.

Journal article
Published: 11 March 2021 in Urban Water Journal
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The occurrence of a representative range of pharmaceutical compounds (PhCs) in urban wastewaters was studied in two Portuguese water-scarce regions (Lisbon great area, and Faro – Algarve), involving 55 sampling campaigns during 2.5 years. The results show 16 PhCs (out of the 24 analysed) were quantified in all samples, with similar concentrations in both wastewaters. To understand to what extent seasonality affects PhC occurrence, a statistical analysis was conducted, and daily maximum air temperature was identified as a key factor, with a turning point of 20°C in Lisbon and 22°C in Faro. Some PhCs showed lower concentrations in colder (wet) months due to rainwater dilution (combined sewer systems), whereas others showed higher concentrations, reflecting an increased seasonal consumption and/or slower transformation under lower temperatures and/or shorter hydraulic retention times. Seasonal studies should therefore focus on temperature rather than on calendar seasons, increasingly uncertain due to climate change.

ACS Style

Catarina Silva; Cristina M. M. Almeida; João A. Rodrigues; Sofia Silva; Maria Do Rosário Coelho; António Martins; Rita Lourinho; Eugénia Cardoso; Vítor Vale Cardoso; Maria João Benoliel; Maria João Rosa. Occurrence and seasonality of pharmaceutical compounds in urban wastewaters in two Portuguese regions. Urban Water Journal 2021, 18, 465 -478.

AMA Style

Catarina Silva, Cristina M. M. Almeida, João A. Rodrigues, Sofia Silva, Maria Do Rosário Coelho, António Martins, Rita Lourinho, Eugénia Cardoso, Vítor Vale Cardoso, Maria João Benoliel, Maria João Rosa. Occurrence and seasonality of pharmaceutical compounds in urban wastewaters in two Portuguese regions. Urban Water Journal. 2021; 18 (6):465-478.

Chicago/Turabian Style

Catarina Silva; Cristina M. M. Almeida; João A. Rodrigues; Sofia Silva; Maria Do Rosário Coelho; António Martins; Rita Lourinho; Eugénia Cardoso; Vítor Vale Cardoso; Maria João Benoliel; Maria João Rosa. 2021. "Occurrence and seasonality of pharmaceutical compounds in urban wastewaters in two Portuguese regions." Urban Water Journal 18, no. 6: 465-478.

Journal article
Published: 27 January 2021 in Membranes
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Pressurized powdered activated carbon/coagulation/ceramic microfiltration (PAC/Alum/MF) was investigated at pilot scale for treating low turbidity and low natural organic matter (NOM) surface waters spiked with organic microcontaminants. A total of 11 trials with clarified or non-clarified waters spiked with pesticides, pharmaceutical compounds, or microcystins were conducted to assess the removal of microcontaminants, NOM (as 254 nm absorbance, A254, and dissolved organic carbon, DOC), trihalomethane formation potential (THMFP), aerobic endospores as protozoan (oo)cysts indicators, bacteriophages as viruses indicators, and regular drinking water quality parameters. PAC/(Alum)/MF achieved 75% to complete removal of total microcontaminants with 4–18 mg/L of a mesoporous PAC and 2 h contact time, with a reliable particle separation (turbidity < 0.03 NTU) and low aluminium residuals. Microcontaminants showed different amenabilities to PAC adsorption, depending on their charge, hydrophobicity (Log Kow), polar surface area and aromatic rings count. Compounds less amenable to adsorption showed higher vulnerability to NOM competition (higher A254 waters), greatly benefiting from DOC-normalized PAC dose increase. PAC/Alum/MF also attained 29–47% NOM median removal, decreasing THMFP by 26%. PAC complemented NOM removal by coagulation (+15–19%), though with no substantial improvement towards THMFP and membrane fouling. Furthermore, PAC/Alum/MF was a full barrier against aerobic endospores, and PAC dosing was crucial for ≥ 1.1-log reduction in bacteriophages.

ACS Style

Margarida Campinas; Rui Viegas; Rosário Coelho; Helena Lucas; Maria Rosa. Adsorption/Coagulation/Ceramic Microfiltration for Treating Challenging Waters for Drinking Water Production. Membranes 2021, 11, 91 .

AMA Style

Margarida Campinas, Rui Viegas, Rosário Coelho, Helena Lucas, Maria Rosa. Adsorption/Coagulation/Ceramic Microfiltration for Treating Challenging Waters for Drinking Water Production. Membranes. 2021; 11 (2):91.

Chicago/Turabian Style

Margarida Campinas; Rui Viegas; Rosário Coelho; Helena Lucas; Maria Rosa. 2021. "Adsorption/Coagulation/Ceramic Microfiltration for Treating Challenging Waters for Drinking Water Production." Membranes 11, no. 2: 91.

Journal article
Published: 20 January 2021 in Membranes
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Two pilot trials of powdered activated carbon (PAC)/(coagulation)/ceramic microfiltration were conducted to compare continuous 10–12 mg/L PAC inline dosing with 8–10 mg/L dosing to a 2 h-contact tank. Two low turbidity/low natural organic matter (NOM, total organic carbon <2 mg C/L) surface waters spiked with 7.2–10.3 µg/L total-pesticides were tested and the dosing options were compared towards operational performance, average removal of pesticides and NOM and costs. Removal differences between the two PAC dosing options depended on pesticides’ amenability to adsorption and NOM characteristics (254 nm absorbance, A254). Waters containing low A254-absorbing NOM and only pesticides amenable to adsorption showed very high removals (all pesticides ≥93%) and no significant differences between the two PAC dosing options. Waters containing higher A254-absorbing NOM and high loads of pesticides less amenable to adsorption (dimethoate, bentazone) required higher inline PAC dose. Those or more severe conditions may require PAC doses higher than tested to comply with the Drinking Water Directive limits for pesticides. Cost analysis showed PAC inline dosing is more cost-effective than PAC dosing to the contact tank when identical PAC dose is sufficient or when the doses are low, even if 50% higher for inline dosing, and the plant is small.

ACS Style

Rui Viegas; Margarida Campinas; Rosário Coelho; Helena Lucas; Maria Rosa. Hybrid Process of Adsorption/Coagulation/Ceramic MF for Removing Pesticides in Drinking Water Treatment—Inline vs. Contact Tank PAC Dosing. Membranes 2021, 11, 72 .

AMA Style

Rui Viegas, Margarida Campinas, Rosário Coelho, Helena Lucas, Maria Rosa. Hybrid Process of Adsorption/Coagulation/Ceramic MF for Removing Pesticides in Drinking Water Treatment—Inline vs. Contact Tank PAC Dosing. Membranes. 2021; 11 (2):72.

Chicago/Turabian Style

Rui Viegas; Margarida Campinas; Rosário Coelho; Helena Lucas; Maria Rosa. 2021. "Hybrid Process of Adsorption/Coagulation/Ceramic MF for Removing Pesticides in Drinking Water Treatment—Inline vs. Contact Tank PAC Dosing." Membranes 11, no. 2: 72.

Journal article
Published: 10 December 2020 in Journal of Water Process Engineering
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Pilot runs of powdered activated carbon/coagulation/flocculation/sedimentation (PAC/CFS) were conducted to investigate the removal of 19 pharmaceutical compounds and 9 pesticides as a function of their properties. PAC addition impact on the clarification effectiveness of low-turbidity surface waters was also explored. Four sets of operating conditions tested different PAC types, doses and contact times. Removals of 65–79 % for total-pharmaceuticals and 73–83 % for total-pesticides were achieved with 3−9 mg/L of a mesoporous PAC or with 20−24 mg/L of a microporous PAC. Microcontaminants’ key properties for adsorption were charge, hydrophobicity and aromaticity. For low-hydrophobicity compounds, positively charged functional groups and low surface polar area and/or high number of aromatic rings acted as adsorption enhancers. The positively charged compounds were better removed than the negatively charged ones, an effect stronger for the negatively charged PAC. Results show PAC dose reduced to half/one-third using an adequate PAC and to one-quarter/one-eighth with additional 1-h contact time. PAC dose saving is crucial, for economic and environmental reasons and for PAC/CFS effectiveness. PAC addition, particularly above 10 mg/L PAC, hampered the clarification of the low-turbidity waters studied towards residual turbidity, aluminium and aerobic endospores, and may require a reliable downstream filtration to retain PAC fines.

ACS Style

Margarida Campinas; Catarina Silva; Rui M.C. Viegas; Rosário Coelho; Helena Lucas; Maria João Rosa. To what extent may pharmaceuticals and pesticides be removed by PAC conventional addition to low-turbidity surface waters and what are the potential bottlenecks? Journal of Water Process Engineering 2020, 40, 101833 .

AMA Style

Margarida Campinas, Catarina Silva, Rui M.C. Viegas, Rosário Coelho, Helena Lucas, Maria João Rosa. To what extent may pharmaceuticals and pesticides be removed by PAC conventional addition to low-turbidity surface waters and what are the potential bottlenecks? Journal of Water Process Engineering. 2020; 40 ():101833.

Chicago/Turabian Style

Margarida Campinas; Catarina Silva; Rui M.C. Viegas; Rosário Coelho; Helena Lucas; Maria João Rosa. 2020. "To what extent may pharmaceuticals and pesticides be removed by PAC conventional addition to low-turbidity surface waters and what are the potential bottlenecks?" Journal of Water Process Engineering 40, no. : 101833.

Journal article
Published: 22 July 2020 in Separation and Purification Technology
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A powdered activated carbon (PAC)/ceramic microfiltration (MF) pilot was operated (24/7) in a water treatment plant during 18 months, with water from different points of the treatment line (raw, ozonated with recirculated filter-backwash waters, ozonated/pre-coagulated, filtered), the testing including MF and PAC/MF. The optimization of PAC/MF operational performance, including PAC effect analysis and pretreatment required, and a cost analysis are herein presented. A new indicator was developed and explored for performance assessment and optimization, the treatment capacity (TCp), i.e. the design flowrate normalized to membrane area and intake pressure. As expected, a higher TCp was obtained with filtered water. Non-clarified waters required alum-coagulation pretreatment to minimize membrane fouling, and achieved similar TCp results among them. PAC addition (6–24 mg/L) did not promote membrane fouling and had no or a slight positive effect on TCp. TCp integrates all key aspects of process productivity and therefore constitutes a useful indicator to balance flux, energy consumption, backwash frequency and chemical cleaning frequency. The cost functions developed for PAC/MF yielded, for the best operating conditions found for the low-turbidity, low-dissolved organic content waters tested, a total cost of 0.07–0.11 €/m3 for 100,000 m3/d, including investment and operation costs.

ACS Style

Margarida Campinas; Rui Viegas; Catarina Silva; Helena Lucas; Maria João Rosa. Operational performance and cost analysis of PAC/ceramic MF for drinking water production: Exploring treatment capacity as a new indicator for performance assessment and optimization. Separation and Purification Technology 2020, 255, 117443 .

AMA Style

Margarida Campinas, Rui Viegas, Catarina Silva, Helena Lucas, Maria João Rosa. Operational performance and cost analysis of PAC/ceramic MF for drinking water production: Exploring treatment capacity as a new indicator for performance assessment and optimization. Separation and Purification Technology. 2020; 255 ():117443.

Chicago/Turabian Style

Margarida Campinas; Rui Viegas; Catarina Silva; Helena Lucas; Maria João Rosa. 2020. "Operational performance and cost analysis of PAC/ceramic MF for drinking water production: Exploring treatment capacity as a new indicator for performance assessment and optimization." Separation and Purification Technology 255, no. : 117443.

Journal article
Published: 07 July 2020 in Science of The Total Environment
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This paper assesses the applicability of a new carob waste-derived powdered activated carbon (PAC) obtained by steam activation for pharmaceutical compounds (PhCs) removal in urban wastewater treatment plants (WWTPs) with activated sludge (AS) secondary treatment. The new carob-derived PAC presents chemical and textural properties similar to a high-performing commercial PAC produced from vegetable source by physical activation. The adsorption isotherms of three target PhCs, carbamazepine, diclofenac and sulfamethoxazole, spiked (at around 100 μg/L) in mixed liquor (ML) and in clarified-ML from the AS-bioreactor of a WWTP show: (i) minor reduction of PAC capacity with real MLs compared to clarified MLs; (ii) the higher the PhC hydrophobicity, the higher the PAC adsorption capacity in both water matrices; (iii) hydrophobic interactions probably overweight electrostatic interactions between the PhCs and the slightly positively charged PAC in these real water matrices with background organics and inorganics. The PhC adsorption results with ML and clarified-ML are used to calibrate the IAST-based tracer model (TRM) and predict the new PAC performance when added to AS-bioreactor vs. in post-secondary treatment, at the PhC naturally-occurring trace concentrations. The modelling projections show (i) one needs higher PAC doses than those reported in the literature, particularly in post-treatment, and (ii) the benefits of PAC dosing to the bioreactor, with only a slightly higher PAC dose being needed when compared to its post-secondary dosing and minimising the capital investment.

ACS Style

Rui M.C. Viegas; Ana S. Mestre; Elsa Mesquita; Margarida Campinas; Marta A. Andrade; Ana P. Carvalho; Maria João Rosa. Assessing the applicability of a new carob waste-derived powdered activated carbon to control pharmaceutical compounds in wastewater treatment. Science of The Total Environment 2020, 743, 140791 .

AMA Style

Rui M.C. Viegas, Ana S. Mestre, Elsa Mesquita, Margarida Campinas, Marta A. Andrade, Ana P. Carvalho, Maria João Rosa. Assessing the applicability of a new carob waste-derived powdered activated carbon to control pharmaceutical compounds in wastewater treatment. Science of The Total Environment. 2020; 743 ():140791.

Chicago/Turabian Style

Rui M.C. Viegas; Ana S. Mestre; Elsa Mesquita; Margarida Campinas; Marta A. Andrade; Ana P. Carvalho; Maria João Rosa. 2020. "Assessing the applicability of a new carob waste-derived powdered activated carbon to control pharmaceutical compounds in wastewater treatment." Science of The Total Environment 743, no. : 140791.

Journal article
Published: 15 January 2020 in Water Science and Technology
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Concentration polarization is a phenomenon inherent to membrane separation operations and as a precursor of membrane fouling is frequently related to the decrease in the performance of these operations. In the present work, a case-specific mass transfer correlation was developed to assess the concentration polarization when nanofiltration, in different operating conditions, was applied to treat a pharmaceutical wastewater containing atenolol. NF runs with two membranes, two atenolol concentrations and three feed circulating velocities were conducted, and the corresponding experimental mass transfer coefficients were determined using film theory to describe the concentration polarization phenomenon. Higher velocities led to higher mass transfer coefficients and, consequently, lower concentration polarization. These mass transfer coefficients were correlated with the circulating velocity (Re), the solute diffusivity (Sc) and the membrane permeability (LP+) (the membrane is a permeable interface with effect on the concentration profiles developed from the interface towards the bulk feed), yielding the following correlation Sh = 1.98 × 104Re0.5Sc0.33LP+0.32. The good agreement between the calculated and the experimental results makes this correlation a valuable tool for water practitioners to predict and control the concentration polarization during atenolol-rich wastewater treatment by nanofiltration, thereby increasing its productivity and selectivity.

ACS Style

Alexandre Giacobbo; Elisa Veridiani Soares; Andréa Moura Bernardes; Maria João Rosa; Maria Norberta De Pinho. Atenolol removal by nanofiltration: a case-specific mass transfer correlation. Water Science and Technology 2020, 81, 210 -216.

AMA Style

Alexandre Giacobbo, Elisa Veridiani Soares, Andréa Moura Bernardes, Maria João Rosa, Maria Norberta De Pinho. Atenolol removal by nanofiltration: a case-specific mass transfer correlation. Water Science and Technology. 2020; 81 (2):210-216.

Chicago/Turabian Style

Alexandre Giacobbo; Elisa Veridiani Soares; Andréa Moura Bernardes; Maria João Rosa; Maria Norberta De Pinho. 2020. "Atenolol removal by nanofiltration: a case-specific mass transfer correlation." Water Science and Technology 81, no. 2: 210-216.

Case report
Published: 02 January 2020 in Urban Water Journal
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Water systems and particularly wastewater treatment may only improve or keep high-quality service if their performance is continuously measured and benchmarked against peers. This paper presents a case-study developed under the Portuguese Initiative on Water Quality, Treatment and Energy (iEQTA-WWTP), involving 7 water utilities, and focused on the performance assessment of 23 urban wastewater treatment plants (WWTPs) covering a wide range of treatment sequences and capacities (700-54000 m3/d). An earlier developed system of key performance indicators (KPIs) with reference values was used to assess the plants’ overall performance for effectiveness and reliability, sludge production and energy efficiency taking into consideration, whenever adequate, treatment technology, treated wastewater volume and influent characteristics. This application proved the soundness of the KPI system and its reference values for a blind comparison among WWTPs but also for treatment type- and capacity-specific clustering, ultimately supporting water utilities in a continuous practice of WWTP performance improvement.

ACS Style

Catarina Silva; Maria João Rosa. Performance assessment of 23 wastewater treatment plants - a case study. Urban Water Journal 2020, 17, 78 -85.

AMA Style

Catarina Silva, Maria João Rosa. Performance assessment of 23 wastewater treatment plants - a case study. Urban Water Journal. 2020; 17 (1):78-85.

Chicago/Turabian Style

Catarina Silva; Maria João Rosa. 2020. "Performance assessment of 23 wastewater treatment plants - a case study." Urban Water Journal 17, no. 1: 78-85.

Journal article
Published: 01 January 2020 in Water
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Urban water systems (UWSs) are energy-intensive worldwide, particularly for drinking-water pumping and aeration in wastewater treatment. Usual approaches to improve energy efficiency focus only on equipment and disregard the UWS as a continuum of stages from source-to-tap-to-source (abstraction/transport—treatment—drinking water transport/distribution—wastewater and stormwater collection/transport—treatment—discharge/reuse). We propose a framework for a comprehensive assessment of UWS energy efficiency and a four-level approach to enforce it: overall UWS (level 1), stage (level 2), infrastructure component (level 3) and processes/equipment (level 4). The framework is structured by efficiency and effectiveness criteria (an efficient but ineffective infrastructure is useless), earlier and newly developed performance indicators and reference values. The framework and the approach are the basis for a sound diagnosis and intervention prioritising, and are being tested in a peer-to-peer innovation project involving 13 water utilities (representing 17% of the energy consumption by the Portuguese water sector in 2017). Results of levels 1–3 of analysis herein illustrated for a water utility demonstrate the framework and approach potential to assess UWS effectiveness and energy efficiency, and to select the stages and infrastructures for improvement and deeper diagnosis.

ACS Style

Dália Loureiro; Catarina Silva; Maria Adriana Cardoso; Aisha Mamade; Helena Alegre; Maria João Rosa. The Development of a Framework for Assessing the Energy Efficiency in Urban Water Systems and Its Demonstration in the Portuguese Water Sector. Water 2020, 12, 134 .

AMA Style

Dália Loureiro, Catarina Silva, Maria Adriana Cardoso, Aisha Mamade, Helena Alegre, Maria João Rosa. The Development of a Framework for Assessing the Energy Efficiency in Urban Water Systems and Its Demonstration in the Portuguese Water Sector. Water. 2020; 12 (1):134.

Chicago/Turabian Style

Dália Loureiro; Catarina Silva; Maria Adriana Cardoso; Aisha Mamade; Helena Alegre; Maria João Rosa. 2020. "The Development of a Framework for Assessing the Energy Efficiency in Urban Water Systems and Its Demonstration in the Portuguese Water Sector." Water 12, no. 1: 134.

Journal article
Published: 20 December 2019 in Water
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This paper addresses the enhanced removal of pharmaceutical compounds (PhCs), a family of contaminants of emerging concern, and effluent organic matter (EfOM) in water reclamation by powdered activated carbon/coagulation/ceramic microfiltration (PAC/cMF). Four chemically diverse PhCs are targeted: ibuprofen (IBP), carbamazepine (CBZ), sulfamethoxazole (SMX) and atenolol (ATN). Pilot assays (100 L/(m2 h), 10 mg Fe/L) run with PhC-spiked sand-filtered secondary effluent and 15 mg/L PAC dosed in-line or to a 15-min contactor. They showed no PAC-driven membrane fouling and +15 to +18% added removal with PAC contactor, reaching significant removals of CBZ and ATN (59%–60%), SMX (50%), colour (48%), A254 (35%) and dissolved organic carbon (DOC, 28%). Earlier long-term demo tests with the same pilot proved PAC/cMF to consistently produce highly clarified (monthly median < 0.1 NTU) and bacteria-free water, regardless of the severe variations in its intake. A detailed cost analysis points to total production costs of 0.21 €/m3 for 50,000 m3/day and 20 years membrane lifespan, mainly associated to equipment/membranes replacement, capital and reagents.

ACS Style

Rui M. C. Viegas; Elsa Mesquita; Margarida Campinas; Maria João Rosa. Pilot Studies and Cost Analysis of Hybrid Powdered Activated Carbon/Ceramic Microfiltration for Controlling Pharmaceutical Compounds and Organic Matter in Water Reclamation. Water 2019, 12, 33 .

AMA Style

Rui M. C. Viegas, Elsa Mesquita, Margarida Campinas, Maria João Rosa. Pilot Studies and Cost Analysis of Hybrid Powdered Activated Carbon/Ceramic Microfiltration for Controlling Pharmaceutical Compounds and Organic Matter in Water Reclamation. Water. 2019; 12 (1):33.

Chicago/Turabian Style

Rui M. C. Viegas; Elsa Mesquita; Margarida Campinas; Maria João Rosa. 2019. "Pilot Studies and Cost Analysis of Hybrid Powdered Activated Carbon/Ceramic Microfiltration for Controlling Pharmaceutical Compounds and Organic Matter in Water Reclamation." Water 12, no. 1: 33.

Journal article
Published: 21 July 2018 in Membranes
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Concentration polarization is intrinsically associated with the selective character of membranes and often means flux decline and which causes a subsequent decrease of ultrafiltration and nanofiltration performance. More important is the fact that it acts as a precursor of membrane fouling and creates severe fouling problems in the longer times range. The quantification of its dependence on the operating parameters of cross-flow velocities and transmembrane pressures makes recourse to the film theory to introduce mass-transfer coefficients that generally are calculated by dimensionless correlations of the Sherwood number as a function of the Reynolds and Schmidt numbers. In the present work, the mass-transfer coefficients are obtained through the fitting of experimental results by the pressure variation method. The ultrafiltration/nanofiltration of the winery wastewaters from the racking operation is carried out with the membranes ETNA 01PP (Alfa Laval) and NF 270 (Dow Filmtec) under a wide range of cross-flow velocities and transmembrane pressures up to 15 bar.

ACS Style

Alexandre Giacobbo; Andréa Moura Bernardes; Maria João Filipe Rosa; Maria Norberta De Pinho. Concentration Polarization in Ultrafiltration/Nanofiltration for the Recovery of Polyphenols from Winery Wastewaters. Membranes 2018, 8, 46 .

AMA Style

Alexandre Giacobbo, Andréa Moura Bernardes, Maria João Filipe Rosa, Maria Norberta De Pinho. Concentration Polarization in Ultrafiltration/Nanofiltration for the Recovery of Polyphenols from Winery Wastewaters. Membranes. 2018; 8 (3):46.

Chicago/Turabian Style

Alexandre Giacobbo; Andréa Moura Bernardes; Maria João Filipe Rosa; Maria Norberta De Pinho. 2018. "Concentration Polarization in Ultrafiltration/Nanofiltration for the Recovery of Polyphenols from Winery Wastewaters." Membranes 8, no. 3: 46.

Journal article
Published: 01 December 2017 in Águas e Resíduos
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ACS Style

Rita Ribeiro; Maria João Rosa; Catarina Silva. Estratégia para recuperação de fósforo de águas residuais urbanas. Águas e Resíduos 2017, 38 -50.

AMA Style

Rita Ribeiro, Maria João Rosa, Catarina Silva. Estratégia para recuperação de fósforo de águas residuais urbanas. Águas e Resíduos. 2017; (2):38-50.

Chicago/Turabian Style

Rita Ribeiro; Maria João Rosa; Catarina Silva. 2017. "Estratégia para recuperação de fósforo de águas residuais urbanas." Águas e Resíduos , no. 2: 38-50.

Journal article
Published: 01 December 2017 in Águas e Resíduos
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ACS Style

Margarida Campinas; Rui Viegas; Isabel Sousa; Rosário Coelho; Lizete Costa; Helena Lucas; Maria João Rosa; Catarina Silva. Tratamento de água com carvão ativado em pó/microfiltração cerâmica (PAC/MF) – quando e onde? Águas e Resíduos 2017, 17 -29.

AMA Style

Margarida Campinas, Rui Viegas, Isabel Sousa, Rosário Coelho, Lizete Costa, Helena Lucas, Maria João Rosa, Catarina Silva. Tratamento de água com carvão ativado em pó/microfiltração cerâmica (PAC/MF) – quando e onde? Águas e Resíduos. 2017; (2):17-29.

Chicago/Turabian Style

Margarida Campinas; Rui Viegas; Isabel Sousa; Rosário Coelho; Lizete Costa; Helena Lucas; Maria João Rosa; Catarina Silva. 2017. "Tratamento de água com carvão ativado em pó/microfiltração cerâmica (PAC/MF) – quando e onde?" Águas e Resíduos , no. 2: 17-29.

Journal article
Published: 11 October 2016 in Water Science and Technology
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High quality services of wastewater treatment require a continuous assessment and improvement of the technical, environmental and economic performance. This paper demonstrates a comprehensive approach for benchmarking wastewater treatment plants (WWTPs), using performance indicators (PIs) and indices (PXs), in a ‘plan-do-check-act’ cycle routine driven by objectives. The performance objectives herein illustrated were to diagnose the effectiveness and energy performance of an oxidation ditch WWTP. The PI and PX results demonstrated an effective and reliable oxidation ditch (good–excellent performance), and a non-reliable UV disinfection (unsatisfactory–excellent performance) related with influent transmittance and total suspended solids. The energy performance increased with the treated wastewater volume and was unsatisfactory below 50% of plant capacity utilization. The oxidation ditch aeration performed unsatisfactorily and represented 38% of the plant energy consumption. The results allowed diagnosing opportunities for improving the energy and economic performance considering the influent flows, temperature and concentrations, and for levering the WWTP performance to acceptable–good effectiveness, reliability and energy efficiency. Regarding the plant reliability for fecal coliforms, improvement of UV lamp maintenance and optimization of the UV dose applied and microscreen recommissioning were suggested.

ACS Style

C. Silva; José Matos; M. J. Rosa. A comprehensive approach for diagnosing opportunities for improving the performance of a WWTP. Water Science and Technology 2016, 74, 2935 -2945.

AMA Style

C. Silva, José Matos, M. J. Rosa. A comprehensive approach for diagnosing opportunities for improving the performance of a WWTP. Water Science and Technology. 2016; 74 (12):2935-2945.

Chicago/Turabian Style

C. Silva; José Matos; M. J. Rosa. 2016. "A comprehensive approach for diagnosing opportunities for improving the performance of a WWTP." Water Science and Technology 74, no. 12: 2935-2945.

Journal article
Published: 08 October 2016 in Journal of Environmental Management
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Sludge (or biosolids) management is highly complex and has a significant cost associated with the biosolids disposal, as well as with the energy and flocculant consumption in the sludge processing units. The sludge management performance indicators (PIs) and indices (PXs) are thus core measures of the performance assessment system developed for urban wastewater treatment plants (WWTPs). The key PIs proposed cover the sludge unit production and dry solids concentration (DS), disposal/beneficial use, quality compliance for agricultural use and costs, whereas the complementary PIs assess the plant reliability and the chemical reagents' use. A key PI was also developed for assessing the phosphorus reclamation, namely through the beneficial use of the biosolids and the reclaimed water in agriculture. The results of a field study with 17 Portuguese urban WWTPs in a 5-year period were used to derive the PI reference values which are neither inherent to the PI formulation nor literature-based. Clusters by sludge type (primary, activated, trickling filter and mixed sludge) and by digestion and dewatering processes were analysed and the reference values for sludge production and dry solids were proposed for two clusters: activated sludge or biofilter WWTPs with primary sedimentation, sludge anaerobic digestion and centrifuge dewatering; activated sludge WWTPs without primary sedimentation and anaerobic digestion and with centrifuge dewatering. The key PXs are computed for the DS after each processing unit and the complementary PXs for the energy consumption and the operating conditions DS-determining. The PX reference values are treatment specific and literature based. The PI and PX system was applied to a WWTP and the results demonstrate that it diagnosis the situation and indicates opportunities and measures for improving the WWTP performance in sludge management.

ACS Style

C. Silva; J. Saldanha Matos; M.J. Rosa. Performance indicators and indices of sludge management in urban wastewater treatment plants. Journal of Environmental Management 2016, 184, 307 -317.

AMA Style

C. Silva, J. Saldanha Matos, M.J. Rosa. Performance indicators and indices of sludge management in urban wastewater treatment plants. Journal of Environmental Management. 2016; 184 ():307-317.

Chicago/Turabian Style

C. Silva; J. Saldanha Matos; M.J. Rosa. 2016. "Performance indicators and indices of sludge management in urban wastewater treatment plants." Journal of Environmental Management 184, no. : 307-317.

Journal article
Published: 01 September 2016 in Águas e Resíduos
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ACS Style

Catarina Silva; José Saldanha Matos; Maria João Rosa. Estratégia para o desenvolvimento da 3.a geração do sistema de avaliação de desempenho de ETAR. Águas e Resíduos 2016, 70 -82.

AMA Style

Catarina Silva, José Saldanha Matos, Maria João Rosa. Estratégia para o desenvolvimento da 3.a geração do sistema de avaliação de desempenho de ETAR. Águas e Resíduos. 2016; (1):70-82.

Chicago/Turabian Style

Catarina Silva; José Saldanha Matos; Maria João Rosa. 2016. "Estratégia para o desenvolvimento da 3.a geração do sistema de avaliação de desempenho de ETAR." Águas e Resíduos , no. 1: 70-82.

Journal article
Published: 12 May 2016 in Water, Air, & Soil Pollution
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Powdered activated carbon/ultrafiltration (PAC/UF) hybrid process was investigated for removing from wastewater five pharmaceutical and personal care products (PPCPs): 1-H-benzotriazole, DEET, chlorophene, 3-methylindole and nortriptyline-HCl. Adsorption, UF and PAC/UF experiments were performed, focusing on PPCP adsorption as a function of PPCP characteristics and organic matter (EfOM) competition. Two water matrices and two fine-particle PACs were studied, differing on EfOM nature and concentration and on PAC microporosity. Neutral PPCP uptake by the positively charged, meso- and microporous PACs followed PPCP hydrophobicity expressed by log Kow. The uptake of the positively charged nortriptyline exceeded the expected from log D due to its high aromaticity and the background ions, which partially shielded PAC-nortriptyline electrostatic repulsions. Adsorption capacity depended on PPCP hydrophobicity whereas the kinetics further depended on PPCP charge. Hydrophobic EfOM was preferentially adsorbed and a stronger competitor, particularly for PPCPs with logKow < 2.6. The highly microporous PAC better adsorbed these PPCPs and the hydrophobic EfOM, and it attenuated the EfOM competition. For all waters, PAC had no effect on UF-flux, and it significantly improved PPCP and EfOM removal by PAC/UF over standalone PAC and UF. For all conditions and microcontaminants, PPCP uptake exhibited a sigmoid curve with logKow, with a turning point at 2.2–2.6. In real applications, meso- and highly microporous PACs are recommended, and the dose should target the PPCPs with log Kow < 2.6.

ACS Style

Elena Rodriguez; Margarida Campinas; Juan L. Acero; Maria João Rosa. Investigating PPCP Removal from Wastewater by Powdered Activated Carbon/Ultrafiltration. Water, Air, & Soil Pollution 2016, 227, 1 -14.

AMA Style

Elena Rodriguez, Margarida Campinas, Juan L. Acero, Maria João Rosa. Investigating PPCP Removal from Wastewater by Powdered Activated Carbon/Ultrafiltration. Water, Air, & Soil Pollution. 2016; 227 (6):1-14.

Chicago/Turabian Style

Elena Rodriguez; Margarida Campinas; Juan L. Acero; Maria João Rosa. 2016. "Investigating PPCP Removal from Wastewater by Powdered Activated Carbon/Ultrafiltration." Water, Air, & Soil Pollution 227, no. 6: 1-14.

Journal article
Published: 20 May 2015 in Water Science and Technology
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The energy costs usually represent the second largest part of the running costs of a wastewater treatment plant (WWTP). It is therefore crucial to increase the energy efficiency of these infrastructures and to implement energy management systems, where quantitative performance metrics, such as performance indicators (PIs), play a key role. This paper presents energy PIs which cover the unit energy consumption, production, net use from external sources and costs, and the results used to validate them and derive their reference values. The results of a field study with 17 Portuguese WWTPs (5-year period) were consistent with the results obtained through an international literature survey on the two key parcels of the energy balance – consumption and production. The unit energy consumption showed an overall inverse relation with the volume treated, and the reference values reflect this relation for trickling filters and for activated sludge systems (conventional, with coagulation/filtration (C/F) and with nitrification and C/F). The reference values of electrical energy production were derived from the methane generation potential (converted to electrical energy) and literature data, whereas those of energy net use were obtained by the difference between the energy consumption and production.

ACS Style

Catarina Silva; Maria João Rosa. Energy performance indicators of wastewater treatment: a field study with 17 Portuguese plants. Water Science and Technology 2015, 72, 510 -519.

AMA Style

Catarina Silva, Maria João Rosa. Energy performance indicators of wastewater treatment: a field study with 17 Portuguese plants. Water Science and Technology. 2015; 72 (4):510-519.

Chicago/Turabian Style

Catarina Silva; Maria João Rosa. 2015. "Energy performance indicators of wastewater treatment: a field study with 17 Portuguese plants." Water Science and Technology 72, no. 4: 510-519.

Journal article
Published: 20 March 2015 in Journal of Water Reuse and Desalination
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Sustainable water management must nowadays consider alternative water sources and the use of reclaimed water is a good candidate. Low-pressure ceramic membrane filtration is an emerging option for safe water reclamation given its high mechanical and chemical robustness with safety and operational advantages. One-year pilot studies of hybrid coagulation–ceramic filtration were developed in Portugal in two wastewater treatment plants in the Lisbon metropolitan area. The results obtained demonstrated the technology's effectiveness, reliability and efficiency towards water quality, with the hybrid process consistently producing water highly clarified (monthly median <0.1 NTU), bacteria-free and with reduced organic matter content, regardless of the strong and severe variations in its intake.

ACS Style

Rui M. C. Viegas; Elsa Mesquita; Margarida Campinas; Paulo Inocêncio; Ana Paula Teixeira; José Martins; Maria João Rosa. Water reclamation with hybrid coagulation–ceramic microfiltration: first part of a long-term pilot study in Portugal. Journal of Water Reuse and Desalination 2015, 5, 550 -556.

AMA Style

Rui M. C. Viegas, Elsa Mesquita, Margarida Campinas, Paulo Inocêncio, Ana Paula Teixeira, José Martins, Maria João Rosa. Water reclamation with hybrid coagulation–ceramic microfiltration: first part of a long-term pilot study in Portugal. Journal of Water Reuse and Desalination. 2015; 5 (4):550-556.

Chicago/Turabian Style

Rui M. C. Viegas; Elsa Mesquita; Margarida Campinas; Paulo Inocêncio; Ana Paula Teixeira; José Martins; Maria João Rosa. 2015. "Water reclamation with hybrid coagulation–ceramic microfiltration: first part of a long-term pilot study in Portugal." Journal of Water Reuse and Desalination 5, no. 4: 550-556.