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Parsy A, Ficara E, Mezzanotte V, Guerreschi A, Guyoneaud R, Monlau F, Sambusiti C. Incorporating saline microalgae biomass in anaerobic digester treating sewage sludge: Impact on performance and microbial populations. Bioresour Technol 2024; 397:130444. [PMID: 38360220 DOI: 10.1016/j.biortech.2024.130444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/01/2024] [Accepted: 02/08/2024] [Indexed: 02/17/2024]
Abstract
The aim of this study was to acclimate anaerobic prokaryotes to saline microalgae biomass. Semi-continuous experiments were conducted using two 1.5 L mesophilic reactors for 10 weeks, (hydraulic retention time of 21 days). The first reactor was solely fed with sewage sludge (control), while the second received a mixture of sewage sludge and microalgal biomass (80/20 %w/w) cultivated at 70 g·L-1 salinity. The in-reactor salinity reached after the acclimation phase was 14 g·L-1. Biomethane production was comparable between the control and acclimated reactors (205 ± 29 NmLMethane·gVolatileSolids-1). Salinity tolerance assessment of methanogenic archaea revealed that salinity causing 50% inhibition of methane production increased from 10 to 27 g·L-1 after acclimation. Microbial diversity analyses revealed notable changes in methanogenic archaea populations during co-digestion of saline microalgae biomass, particularly methylotrophic (+27%) and acetotrophic (-26%) methanogens. This study has highlighted the possibility of treating efficiently saline microalgae in co-digestion with sewage sludge in future industrial biogas plants.
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Affiliation(s)
- Aurélien Parsy
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS IPREM, Environmental Microbiology and Chemistry, UMR 5254, 64000 Pau, France; TotalEnergies, OneTech, PERL ESD - Pôle D'Etudes et de Recherche de Lacq, Pôle Economique 2, BP 47 - RD 817, 64170 Lacq, France
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - Valeria Mezzanotte
- Università Degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - Arianna Guerreschi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - Rémy Guyoneaud
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS IPREM, Environmental Microbiology and Chemistry, UMR 5254, 64000 Pau, France
| | - Florian Monlau
- TotalEnergies, OneTech, PERL ESD - Pôle D'Etudes et de Recherche de Lacq, Pôle Economique 2, BP 47 - RD 817, 64170 Lacq, France
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Passalacqua E, Collina E, Fullana A, Mezzanotte V. Mini-review: Nanoparticles for enhanced biogas upgrading. Waste Manag Res 2024:734242X241231397. [PMID: 38390720 DOI: 10.1177/0734242x241231397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
This mini-review is intended to explore the innovative applications of nanoparticles (NPs) in biogas upgrading, emphasizing their capacity to enhance biogas quality. Numerous studies underscore how NPs, when applied during anaerobic digestion, can boost not only the quantity but also the quality of the produced biogas, leading to reduce significantly the concentration of hydrogen sulphide or even to remove it completely. Moreover, NPs are proving to be excellent alternatives as adsorbent materials, achieving up to 400 mgH2S g-1 NPs. In addition, new studies are exploring the application of NPs to increase the efficiency of biological treatments thanks to their unique features. This review also emphasizes the potential benefits and addresses the challenges that need to be overcome for these technologies to reach their full potential, ultimately contributing to the development of a sustainable and environmentally friendly energy landscape.
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Affiliation(s)
- Elena Passalacqua
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano - Bicocca, Milano, Italy
| | - Elena Collina
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano - Bicocca, Milano, Italy
| | - Andres Fullana
- Department of Chemical Engineering, Universidad de Alicante, San Vicente del Raspeig, Alicante, Spain
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano - Bicocca, Milano, Italy
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Esposito F, Mezzanotte V, Tesei C, Luciano A, Gigliotti PE, Nunzi A, Secchi R, Angeloni C, Pitaro M, Meconi F, Cerocchi M, Garaci F, Venditti A, Postorino M, Chiocchi M. CT Images in Follicular Lymphoma: Changes after Treatment Are Predictive of Cardiac Toxicity in Patients Treated with Anthracycline-Based or R-B Regimens. Cancers (Basel) 2024; 16:563. [PMID: 38339313 PMCID: PMC10854703 DOI: 10.3390/cancers16030563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024] Open
Abstract
The aim of this study is to evaluate changes in epicardial adipose tissue (EAT) and cardiac extracellular volume (ECV) in patients with follicular lymphoma (FL) treated with R-CHOP-like regimens or R-bendamustine. We included 80 patients with FL between the ages of 60 and 80 and, using computed tomography (CT) performed at onset and at the end of treatment, we assessed changes in EAT by measuring tissue density at the level of the cardiac apex, anterior interventricular sulcus and posterior interventricular sulcus of the heart. EAT is known to be associated with metabolic syndrome, increased calcium in the coronary arteries and therefore increased risk of coronary artery disease. We also evaluated changes in ECV, which can be used as an early imaging marker of cardiac fibrosis and thus myocardial damage. The R-CHOP-like regimen was associated with lower EAT values (p < 0.001), indicative of a less active metabolism and more adipose tissue, and an increase in ECV (p < 0.001). Furthermore, in patients treated with anthracyclines and steroids (R-CHOP-like) there is a greater decrease in ejection fraction (EF p < 0.001) than in the R-B group. EAT and ECV may represent early biomarkers of cardiological damage, and this may be considered, to our knowledge, the first study investigating radiological and cardiological parameters in patients with FL.
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Affiliation(s)
- Fabiana Esposito
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Valeria Mezzanotte
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Cristiano Tesei
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Alessandra Luciano
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Paola Elda Gigliotti
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Andrea Nunzi
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Roberto Secchi
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Cecilia Angeloni
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Maria Pitaro
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Federico Meconi
- Fondazione Policlinico di Roma Tor Vergata, 00133 Rome, Italy;
| | - Martina Cerocchi
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Francesco Garaci
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
| | - Adriano Venditti
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Massimiliano Postorino
- Hematology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy; (V.M.); (C.T.); (A.N.); (R.S.); (A.V.); (M.P.)
| | - Marcello Chiocchi
- Department of Diagnostic Imaging and Interventional Radiology, University of Rome Tor Vergata, 00133 Rome, Italy; (A.L.); (P.E.G.); (C.A.); (M.P.); (M.C.); (F.G.); (M.C.)
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Mantovani M, Rossi S, Ficara E, Collina E, Marazzi F, Lasagni M, Mezzanotte V. Removal of pharmaceutical compounds from the liquid phase of anaerobic sludge in a pilot-scale high-rate algae-bacteria pond. Sci Total Environ 2024; 908:167881. [PMID: 37865249 DOI: 10.1016/j.scitotenv.2023.167881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/09/2023] [Accepted: 10/14/2023] [Indexed: 10/23/2023]
Abstract
This study evaluates the effectiveness of a pilot-scale high-rate algae-bacteria pond (HRAP) to remove pharmaceutical compounds (PhACs) from municipal centrate. The studied PhACs belonged to different classes of synthetic active compounds: antihypertensives, antiepileptics, antidepressants, neuroprotectors, and anti-inflammatory drugs. The HRAP, growing a mixed microalgal consortium made of Chlorella spp. and Scenedesmus spp., was operated in continuous mode (6 days hydraulic retention time) from May to November 2021. Removal efficiencies were high (>85 %) for Sulfamethoxazole and Lamotrigine, promising (65-70 %) for Metoprolol, Fluoxetine, and Diclofenac but low (30-40 %) for Amisulpride, Ofloxacin, Carbamazepine, and Clarithromycin. Propyphenazone and Irbesartan were not removed, and their concentrations increased after the treatment. The combination of abiotic and biotic drivers (mostly global radiation and the synergy between microalgae and bacteria metabolisms) fostered photo and biodegradation processes. Overall, results suggest that microalgae-based systems can be a valuable solution to remove PhACs from wastewater.
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Affiliation(s)
- Marco Mantovani
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Simone Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - Elena Collina
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Francesca Marazzi
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Marina Lasagni
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Valeria Mezzanotte
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy.
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Rossi S, Carecci D, Marazzi F, Di Benedetto F, Mezzanotte V, Parati K, Alberti D, Geraci I, Ficara E. Integrating microalgae growth in biomethane plants: Process design, modelling, and cost evaluation. Heliyon 2024; 10:e23240. [PMID: 38163195 PMCID: PMC10755323 DOI: 10.1016/j.heliyon.2023.e23240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024] Open
Abstract
The integration of microalgae cultivation in anaerobic digestion (AD) plants can take advantage of relevant nutrients (ammonium and ortho-phosphate) and CO2 loads. The proposed scheme of microalgae integration in existing biogas plants aims at producing approximately 250 t·y-1 of microalgal biomass, targeting the biostimulants market that is currently under rapid expansion. A full-scale biorefinery was designed to treat 50 kt·y-1 of raw liquid digestate from AD and 0.45 kt·y-1 of CO2 from biogas upgrading, and 0.40 kt·y-1 of sugar-rich solid by-products from a local confectionery industry. An innovative three-stage cultivation process was designed, modelled, and verified, including: i) microalgae inoculation in tubular PBRs to select the desired algal strains, ii) microalgae cultivation in raceway ponds under greenhouses, and iii) heterotrophic microalgae cultivation in fermenters. A detailed economic assessment of the proposed biorefinery allowed to compute a biomass production cost of 2.8 ± 0.3 €·kg DW-1, that is compatible with current downstream process costs to produce biostimulants, suggesting that the proposed nutrient recovery route is feasible from the technical and economic perspective. Based on the case study analysis, a discussion of process, bioproducts and policy barriers that currently hinder the development of microalgae-based biorefineries is presented.
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Affiliation(s)
- Simone Rossi
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Davide Carecci
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Francesca Marazzi
- University of Milano – Bicocca, DISAT – Department of Earth and Environmental Sciences, 1, P.zza della Scienza, 20126 Milano, Italy
| | - Francesca Di Benedetto
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Valeria Mezzanotte
- University of Milano – Bicocca, DISAT – Department of Earth and Environmental Sciences, 1, P.zza della Scienza, 20126 Milano, Italy
| | - Katia Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Aquaculture division, 26027 Rivolta d’Adda, Italy
| | | | | | - Elena Ficara
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
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Nunzi A, Ciangola G, Cerroni I, Mezzanotte V, Trotta GE, Meconi F, Zizzari A, Rapisarda VM, Savino L, Brega A, Argirò R, De Angelis G, Mariotti B, Bonanni F, Meddi E, Gurnari C, Bruno A, Mangione I, Venditti A, Cerretti R. Overlapping features of hepatic complications after hematopoietic cell transplantation in a rare T-cell lymphoma: A clinical challenge. Curr Res Transl Med 2023; 72:103436. [PMID: 38277899 DOI: 10.1016/j.retram.2023.103436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/18/2023] [Indexed: 01/28/2024]
Abstract
We present the case of a young adult, who developed several hepatic post-HCT complications, which made differential diagnosis extremely difficult.
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Affiliation(s)
- Andrea Nunzi
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Giulia Ciangola
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia.
| | - Ilaria Cerroni
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Valeria Mezzanotte
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Gentiana Elena Trotta
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Federico Meconi
- Unità Patologie Linfoproliferative, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Annagiulia Zizzari
- Unità Patologie Linfoproliferative, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Vito Mario Rapisarda
- Unità Patologie Linfoproliferative, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Luca Savino
- Unità Anatomia Patologica, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Arianna Brega
- Unità Epatologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Renato Argirò
- Unità Radiologia Interventistica, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Gottardo De Angelis
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Benedetta Mariotti
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Fabrizio Bonanni
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Elisa Meddi
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Carmelo Gurnari
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia; Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH, United States of America
| | - Antoine Bruno
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Ilaria Mangione
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Adriano Venditti
- Ematologia, Dipartimento di Biomedicina e Prevenzione, Università degli Studi di Roma Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
| | - Raffaella Cerretti
- Unità Trapianto di Cellule Staminali Ematopoietiche, Dipartimento di Oncoematologia, Fondazione Policlinico di Tor Vergata, Viale Oxford 81, 00133, Roma, Italia
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Marazzi F, Fornaroli R, Clagnan E, Brusetti L, Ficara E, Bellucci M, Mezzanotte V. Wastewater from textile digital printing as a substrate for microalgal growth and valorization. Bioresour Technol 2023; 375:128828. [PMID: 36878375 DOI: 10.1016/j.biortech.2023.128828] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
This study aims at evaluating an innovative biotechnological process for the concomitant bioremediation and valorization of wastewater from textile digital printing technology based on a microalgae/bacteria consortium. Nutrient and colour removal were assessed in lab-scale batch and continuous experiments and the produced algae/bacteria biomass was characterized for pigment content and biomethane potential. Microbial community analysis provided insight of the complex community structure responsible for the bioremediation action. Specifically, a community dominated by Scenedesmus spp. and xenobiotic and dye degrading bacteria was naturally selected in continuous photobioreactors. Data confirm the ability of the microalgae/bacteria consortium to grow in textile wastewater while reducing the nutrient content and colour. Improvement strategies were eventually identified to foster biomass growth and process performances. The experimental findings pose the basis of the integration of a microalgal-based process into the textile sector in a circular economy perspective.
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Affiliation(s)
- Francesca Marazzi
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Riccardo Fornaroli
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Elisa Clagnan
- Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy
| | - Lorenzo Brusetti
- Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - Micol Bellucci
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy; Research and Science Department, Italian Space Agency (ASI), Via del Politecnico snc, Rome 00133, Italy.
| | - Valeria Mezzanotte
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
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Bonacina L, Fasano F, Mezzanotte V, Fornaroli R. Effects of water temperature on freshwater macroinvertebrates: a systematic review. Biol Rev Camb Philos Soc 2023; 98:191-221. [PMID: 36173002 PMCID: PMC10088029 DOI: 10.1111/brv.12903] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/26/2022] [Accepted: 08/31/2022] [Indexed: 01/12/2023]
Abstract
Water temperature is one of the main abiotic factors affecting the structure and functioning of aquatic ecosystems and its alteration can have important effects on biological communities. Macroinvertebrates are excellent bio-indicators and have been used for decades to assess the status of aquatic ecosystems as a result of environmental stresses; however, their responses to temperature are poorly documented and have not been systematically evaluated. The aims of this review are: (i) to collate and summarize responses of freshwater macroinvertebrates to different temperature conditions, comparing the results of experimental and theoretical studies; (ii) to understand how the focus of research on the effects of temperature on macroinvertebrates has changed during the last 51 years; and (iii) to identify research gaps regarding temperature responses, ecosystem types, organism groups, spatiotemporal scales, and geographical regions to suggest possible research directions. We performed a comparative assessment of 223 publications that specifically consider freshwater macroinvertebrates and address the effects of temperature. Short-term studies performed in the laboratory and focusing on insects exposed to a range of temperatures dominated. Field studies were carried out mainly in Europe, at catchment scale and almost exclusively in rivers; they mainly investigated responses to water thermal regime at the community scale. The most frequent biological responses tested were growth rate, fecundity and the time and length of emergence, whereas ecological responses mainly involved composition, richness, and distribution. Thermal research on freshwater macroinvertebrates has undergone a shift since the 2000s when studies involving extended spatiotemporal scales and investigating the effects of global warming first appeared. In addition, recent studies have considered the effects of temperature at genetic and evolutionary scales. Our review revealed that the effects of temperature on macroinvertebrates are manifold with implications at different levels, from genes to communities. However, community-level physiological, phenological and fitness responses tested on individuals or populations should be studied in more detail given their macroecological effects are likely to be enhanced by climate warming. In addition, most field studies at regional scales have used air temperature as a proxy for water temperature; obtaining accurate water temperature data in future studies will be important to allow proper consideration of the spatial thermal heterogeneity of water bodies and any effects on macroinvertebrate distribution patterns. Finally, we found an uneven number of studies across different ecosystems and geographic areas, with lentic bodies and regions outside the West underrepresented. It will also be crucial to include macroinvertebrates of high-altitude and tropical areas in future work because these groups are most vulnerable to climate warming for multiple reasons. Further studies on temperature-macroinvertebrate relationships are needed to fill the current gaps and facilitate appropriate conservation strategies for freshwater ecosystems in an anthropogenic-driven era.
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Affiliation(s)
- Luca Bonacina
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milan, Italy
| | - Federica Fasano
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milan, Italy
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milan, Italy
| | - Riccardo Fornaroli
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milan, Italy
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Mantovani M, Collina E, Lasagni M, Marazzi F, Mezzanotte V. Production of microalgal-based carbon encapsulated iron nanoparticles (ME-nFe) to remove heavy metals in wastewater. Environ Sci Pollut Res Int 2023; 30:6730-6745. [PMID: 36008581 PMCID: PMC9894965 DOI: 10.1007/s11356-022-22506-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
The integration of microalgae-bacteria consortia within existing wastewater treatment plants as alternative biological treatment could be an interesting option to improve the sustainability of these facilities. However, the fate of the produced biomass is decisive to make that option economically attractive. The present study aimed to valorize the microalgae grown at a pilot scale and used for the treatment of the centrate from municipal sewage sludge, producing microalgal-based iron nanoparticles (ME-nFe), by hydrothermal carbonization. The final product had high carbon content, strong sorbent power, and reducing properties, due to the presence of zerovalent iron. Different synthesis conditions were tested, comparing iron (III) nitrate nonahydrate (Fe (NO3)3·9H2O) and ammonium iron (III) sulfate dodecahydrate (NH4 Fe (SO4)2·12 H2O) as iron sources, four different Fe/C molar ratios (0.02, 0.05, 0.1, 0.2), and three process temperatures (180, 200, 225 °C). Based on the characterization of all the prototypes, the best one (having a specific area of 110 m2g-1) was chosen and tested for the removal of selected heavy metals by Jar tests. The removal of copper, zinc, cadmium, and nickel from the treated effluent from the wastewater treatment plant was 99.6%, 97.8%, 96.4%, and 80.3%, respectively, also for very low starting concentrations (1 mg L-1). The removal of total chromium, on the contrary, was only 12.4%. Thanks to the magnetic properties, the same batch of ME-nFe was recovered and used effectively for three consecutive Jar tests.
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Affiliation(s)
- Marco Mantovani
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, P.zza della Scienza 1, 20126, Milano, Italy.
| | - Elena Collina
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, P.zza della Scienza 1, 20126, Milano, Italy
| | - Marina Lasagni
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, P.zza della Scienza 1, 20126, Milano, Italy
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, P.zza della Scienza 1, 20126, Milano, Italy
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, P.zza della Scienza 1, 20126, Milano, Italy
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Rossi S, Pizzera A, Bellucci M, Marazzi F, Mezzanotte V, Parati K, Ficara E. Piggery wastewater treatment with algae-bacteria consortia: Pilot-scale validation and techno-economic evaluation at farm level. Bioresour Technol 2022; 351:127051. [PMID: 35341919 DOI: 10.1016/j.biortech.2022.127051] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
The efficiency of an outdoor pilot-scale raceway pond treating the wastewaters generated by a large-scale piggery farm in Northern Italy was evaluated. The biomass productivity over 208 days of experimentation was 10.7 ± 6.5 g TSS·m-2·d-1, and ammoniacal nitrogen, orthophosphate, and COD average removal efficiencies were 90%, 90%, and 59%, respectively. Results were used to perform a comprehensive techno-economic analysis for integrating algae-based processes in farms of different sizes (100-10000 pigs). The amount of N disposed of on agricultural land could be reduced from 91% to 21%, increasing the fraction returned to the atmosphere from 2.4% to 63%, and the fraction in the biomass from 6.2% to 16%. For intensive farming, the release of 110 t N·ha-1·y-1 contained in the digestate could be avoided by including algae-bacteria processes. The biomass production cost was as low as 1.9 €·kg-1, while the cost for nitrogen removal was 4.3 €·kg N-1.
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Affiliation(s)
- S Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - A Pizzera
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - M Bellucci
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - F Marazzi
- Università degli Studi di Milano, Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - V Mezzanotte
- Università degli Studi di Milano, Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - K Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, Cremona, Rivolta d'Adda, Italy
| | - E Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy.
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11
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Rossi S, Visigalli S, Castillo Cascino F, Mantovani M, Mezzanotte V, Parati K, Canziani R, Turolla A, Ficara E. Metal-based flocculation to harvest microalgae: a look beyond separation efficiency. Sci Total Environ 2021; 799:149395. [PMID: 34426344 DOI: 10.1016/j.scitotenv.2021.149395] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/08/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Metal-based flocculants are commonly used for biomass harvesting in microalgae-based bio-refineries. Besides the high separation efficiency, additional aspects should be considered, related to the toxicity of metals for the algal biomass. Partitioning tests for commonly used flocculants (i.e., FeCl3 and Al2(SO4)3) showed that metals were mostly transferred to the solid phase with more than 95% of dosed metal ending up into the biomass, and low metal concentrations in the liquid effluent (lower than 0.4 mg L-1 for both metals), thus allowing for water reuse. Photosynthesis inhibition was tested on microalgae and microalgae-bacteria cultures, using a standardized photo-respirometry protocol in which typical concentrations used during coagulation-flocculation were assessed. Modelling dose-response curves, concentrations corresponding to 50% inhibition (IC50) were obtained, describing short-term effects. The obtained IC50 ranged from 13.7 to 28.3 mg Al L-1 for Al, and from 127.9 to 195.8 mg Fe L-1 for Fe, showing a higher toxicity for the Al-based flocculant. The recovery of photosynthesis inhibition was also quantified, to evaluate the possibility of reusing/recycling the harvested biomass. The results highlighted that the residual photosynthetic activities, evaluated after 1 h and 24 h of exposure to metals were partially recovered, especially for Al, passing from 67.3% to 94.6% activity, respectively, while long-term Fe effects were stronger (passing from 64.9% to 77.6% activity). A non-toxic flocculant (cationic starch) was finally tested, excluding potential effects due to biomass aggregation, as the reduction of photosynthetic activity only reached 3.4%, compared to control. Relevant modifications to the light availability and the optical properties of algal suspensions were assessed, identifying a strong effect of iron which caused an increase of the light absorbance up to approximately 40% at high Fe concentrations. Possible implications of dosing metallic flocculants in MBWWT processes are discussed, and suggestions are given to perform inhibition tests on flocculating chemicals.
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Affiliation(s)
- S Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - S Visigalli
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - F Castillo Cascino
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, 26027 Rivolta d'Adda, Italy
| | - M Mantovani
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - V Mezzanotte
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - K Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, 26027 Rivolta d'Adda, Italy
| | - R Canziani
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - A Turolla
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - E Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy.
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Milella MS, Grassi MC, Gasbarri A, Mezzanotte V, Pugliese F, Vivino G. Transfer of chemicals to a secondary container, from the introduction of new labelling regulation to COVID-19 lockdown: A retrospective analysis of exposure calls to the Poison Control Centre of Rome, Italy, 2017-2020. Basic Clin Pharmacol Toxicol 2021; 130:200-207. [PMID: 34705330 PMCID: PMC8653016 DOI: 10.1111/bcpt.13678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/28/2021] [Accepted: 10/19/2021] [Indexed: 11/27/2022]
Abstract
The transfer of a chemical product from its original container to an unlabelled secondary container by consumers is a potential health hazard that may result in unintentional exposures and intoxications. The aim of this study was to describe the pattern of prevalence of exposures to transferred products in Italy from year 2017, when the new European labelling regulation for chemicals became fully operative, to 2020, year of the coronavirus 19 disease first outbreak. Calls to the Poison Control Centre (PCC) of Policlinico Umberto I Hospital ‐ Sapienza University of Rome were analysed retrospectively for characteristics, clinical presentation and circumstances related to the event. We registered 198 cases of interest. There was a reduction in cases from 2017 (4.9%) to 2019 (2.2%), followed by an increased prevalence in 2020 (4.2%) mainly due to the months “post‐lockdown.” The transferred product was very frequently diluted, and an empty drinking bottle was usually used as secondary container. Exposures were mostly of minor severity, and no deaths occurred. The study highlights the importance of PCCs data in the evaluation of the hazard communication to users through labels and advises for public campaigns to promote safe behaviours during future lockdowns to prevent exposures at a later period.
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Affiliation(s)
- Michele Stanislaw Milella
- Poison Control Centre Unit, Department of Emergency, Anesthesia and Critical Care Medicine, Policlinico Umberto I Hospital-Sapienza, University of Rome, Rome, Italy.,Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Rome, Italy
| | - Maria Caterina Grassi
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Rome, Italy
| | - Alessia Gasbarri
- Poison Control Centre Unit, Department of Emergency, Anesthesia and Critical Care Medicine, Policlinico Umberto I Hospital-Sapienza, University of Rome, Rome, Italy
| | - Valeria Mezzanotte
- Poison Control Centre Unit, Department of Emergency, Anesthesia and Critical Care Medicine, Policlinico Umberto I Hospital-Sapienza, University of Rome, Rome, Italy
| | - Francesco Pugliese
- Department of Emergency, Anesthesia and Critical Care Medicine, Policlinico Umberto I Hospital-Sapienza, University of Rome, Rome, Italy
| | - Gabriella Vivino
- Poison Control Centre Unit, Department of Emergency, Anesthesia and Critical Care Medicine, Policlinico Umberto I Hospital-Sapienza, University of Rome, Rome, Italy
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13
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Bellucci M, Marazzi F, Musatti A, Fornaroli R, Turolla A, Visigalli S, Bargna M, Bergna G, Canziani R, Mezzanotte V, Rollini M, Ficara E. Assessment of anammox, microalgae and white-rot fungi-based processes for the treatment of textile wastewater. PLoS One 2021; 16:e0247452. [PMID: 33651835 PMCID: PMC7924738 DOI: 10.1371/journal.pone.0247452] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/06/2021] [Indexed: 01/22/2023] Open
Abstract
The treatability of seven wastewater samples generated by a textile digital printing industry was evaluated by employing 1) anammox-based processes for nitrogen removal 2) microalgae (Chlorella vulgaris) for nutrient uptake and biomass production 3) white-rot fungi (Pleurotus ostreatus and Phanerochaete chrysosporium) for decolorization and laccase activity. The biodegradative potential of each type of organism was determined in batch tests and correlated with the main characteristics of the textile wastewaters through statistical analyses. The maximum specific anammox activity ranged between 0.1 and 0.2 g N g VSS-1 d-1 depending on the sample of wastewater; the photosynthetic efficiency of the microalgae decreased up to 50% during the first 24 hours of contact with the textile wastewaters, but it improved from then on; Pleurotus ostreatus synthetized laccases and removed between 20-62% of the colour after 14 days, while the enzymatic activity of Phanerochaete chrysosporium was inhibited. Overall, the findings suggest that all microbes have great potential for the treatment and valorisation of textile wastewater after tailored adaptation phases. Yet, the depurative efficiency can be probably enhanced by combining the different processes in sequence.
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Affiliation(s)
| | | | - Alida Musatti
- Università degli Studi di Milano, DeFENS, Milan, Italy
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14
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Tua C, Ficara E, Mezzanotte V, Rigamonti L. Integration of a side-stream microalgae process into a municipal wastewater treatment plant: A life cycle analysis. J Environ Manage 2021; 279:111605. [PMID: 33168296 DOI: 10.1016/j.jenvman.2020.111605] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 10/13/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
This study investigates the environmental improvements associated to the integration of a microalgae unit as a side-stream process within an existing municipal wastewater treatment facility in northern Italy. Microalgae are fed on the centrate from sludge dewatering, rich in nutrients, and on the CO2 in the flue-gas of the combined heat and power unit. The produced biomass is recirculated upflow the water line where it settles and undergoes anaerobic digestion generating extra biogas. A life cycle assessment was performed collecting primary data from an algal pilot-scale plant installed at the facility. Fifteen environmental indicators were evaluated. Compared to the baseline wastewater treatment, the new algal configuration allows an improvement for 7 out of 15 indicators mainly thanks to the electricity savings in the facility. Some recommendations are provided to improve the performance of the algal system in the scaling up.
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Affiliation(s)
- Camilla Tua
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133, Milano, Italy.
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - Valeria Mezzanotte
- Università Degli Studi di Milano Bicocca, DISAT, Piazza Della Scienza, 1, 20126, Milano, Italy
| | - Lucia Rigamonti
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133, Milano, Italy
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15
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Andreotti V, Solimeno A, Rossi S, Ficara E, Marazzi F, Mezzanotte V, García J. Bioremediation of aquaculture wastewater with the microalgae Tetraselmis suecica: Semi-continuous experiments, simulation and photo-respirometric tests. Sci Total Environ 2020; 738:139859. [PMID: 32534276 DOI: 10.1016/j.scitotenv.2020.139859] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/02/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Tetraselmis suecica was cultivated in a semi-continuously operated tubular photobioreactor fed on aquaculture wastewater (AW) testing two hydraulic retention times (HRT): 10 and 7 days (RUN_1 and RUN_2, respectively). The integrated mechanistic model BIO_ALGAE was validated with experimental data in order to simulate the biomass production and nutrient uptake of T. suecica. Moreover, AW was used as substitute synthetic cultivation medium to test the production of lipids, proteins, and carbohydrates in the microalgal biomass. Preliminary photo-respirometric tests were carried out on the AW suspension containing microalgae and bacteria. Dissolved Inorganic Nitrogen (DIN) and Dissolved Inorganic Phosphorus (DIP) were analyzed for the two RUNs, and no significant difference was highlighted (p > 0.05). On the contrary, the productivity of the Total suspended solids (TSS) was significantly higher (p < 0.05) for RUN_1 (900 mg TSS/L) than for RUN_2 (550 mg TSS/L). The analysis of the biochemical composition of biomass has demonstrated a higher content of proteins than of lipids and carbohydrates for the two RUNs. BIO_ALGAE model was validated by comparing simulated results to experimental data. The model was able to reproduce the pattern of these experimental data quite well, for both nutrient uptake and biomass production. The simulated curve follows the same pattern as the experimental data for both RUNs. The wavelike trend indicates the good accuracy of the simulated curves to reproduce the microalgae growth and nutrient uptake that occurring during daytime and at night. With this study, BIO_ALGAE Model was demonstrated to be useful to simulate bioremediation and microalgae production in aquaculture wastewater in a semi-continuous system with different environmental factors. The photo-respirometric outputs were compared with the process rates affecting dissolved oxygen dynamics computed by the mathematical model.
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Affiliation(s)
- Valeria Andreotti
- GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya BarcelonaTech, c/Jordi Girona, 1-3, 08034 Barcelona, Spain.
| | - Alessandro Solimeno
- Department of Biotechnology, Technological Institute of the Canary Islands (ITC), Playa de Pozo Izquierdo s/n, 35119, Pozo Izquierdo, Las Palmas, Spain
| | - Simone Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Via Golgi, 39, 20133 Milano, Italy
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Via Golgi, 39, 20133 Milano, Italy
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Joan García
- GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya BarcelonaTech, c/Jordi Girona, 1-3, 08034 Barcelona, Spain
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16
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Rossi S, Casagli F, Mantovani M, Mezzanotte V, Ficara E. Selection of photosynthesis and respiration models to assess the effect of environmental conditions on mixed microalgae consortia grown on wastewater. Bioresour Technol 2020; 305:122995. [PMID: 32105843 DOI: 10.1016/j.biortech.2020.122995] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/06/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
This study aimed at evaluating the effects of different environmental conditions (irradiance, temperature, pH and dissolved oxygen) on a microalgae-bacteria consortium cultivated in a pilot-scale open pond and fed on the liquid fraction of anaerobic digestate. A standardized photo-respirometry protocol was followed to evaluate the activity of microalgae under different conditions. Two datasets (specific photosynthetic oxygen production rates and respiratory oxygen consumption rates) were obtained for each environmental parameter, throughout the entire range of conditions found in the outdoor cultivation system. Different kinetic models available in literature were fitted to experimental data and the resulting outputs were compared through model selection estimators, in order to select the most appropriate equations. The proposed set of equations constitute a modelling tool for the prediction of algal growth rates in algae-bacteria systems, as a function of environmental conditions.
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Affiliation(s)
- S Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - F Casagli
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - M Mantovani
- Università Degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - V Mezzanotte
- Università Degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - E Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy.
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Mantovani M, Marazzi F, Fornaroli R, Bellucci M, Ficara E, Mezzanotte V. Outdoor pilot-scale raceway as a microalgae-bacteria sidestream treatment in a WWTP. Sci Total Environ 2020; 710:135583. [PMID: 31785903 DOI: 10.1016/j.scitotenv.2019.135583] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/05/2019] [Accepted: 11/15/2019] [Indexed: 05/27/2023]
Abstract
This study aims at demonstrating the feasibility of using microalgae-bacteria consortia for the treatment of the sidestream flow of the supernatant from blackwater dewatering (centrate) in an urban wastewater treatment plant in Northern Italy. A 1200 L raceway reactor was used for the outdoor cultivation of a diverse community of Chlorella spp., Scenedesmus spp. and Chlamydomonas spp. in continuous operation mode with 10 days hydraulic retention time. During the trial, an average daily areal productivity of 5.5 ± 7.4 g TSS m-2 day-1 was achieved while average nutrient removal efficiencies were 86% ± 7% and 71% ± 10% for NH4-N and PO4-P, respectively. The microalgal nitrogen assimilation accounted for 10% of the nitrogen in the centrate while 34% was oxidized to nitrite and nitrate. The oxygen produced by microalgae fully covert the oxygen demand for nitrification. This suggests that the proposed process would reduce the aeration demand for nitrification in the water line of the plant, while producing algal biomass to be further valorized for energy or material recovery.
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Affiliation(s)
- Marco Mantovani
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy.
| | - Francesca Marazzi
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Riccardo Fornaroli
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - Micol Bellucci
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - Valeria Mezzanotte
- Università degli Studi di Milano - Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
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18
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Marazzi F, Bellucci M, Rossi S, Fornaroli R, Ficara E, Mezzanotte V. Outdoor pilot trial integrating a sidestream microalgae process for the treatment of centrate under non optimal climate conditions. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101430] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Pizzera A, Scaglione D, Bellucci M, Marazzi F, Mezzanotte V, Parati K, Ficara E. Digestate treatment with algae-bacteria consortia: A field pilot-scale experimentation in a sub-optimal climate area. Bioresour Technol 2019; 274:232-243. [PMID: 30513411 DOI: 10.1016/j.biortech.2018.11.067] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/13/2018] [Accepted: 11/18/2018] [Indexed: 06/09/2023]
Abstract
This paper addresses the efficiency of a microalgae-based agricultural digestate treatment at pilot-scale in an outdoor raceway pond (880 L, pH-dependent CO2 dosage) and in a bubble column (74.5 L, air-bubbling). Specifically, nitrogen removal, evolution of the algae-bacteria consortium, and the actual process applicability in the Po Valley climate are discussed. The performance of the two reactors varied seasonally. The average algal productivity in the raceway was 32.4 ± 33.1 mg TSS·L-1·d-1 (8.2 ± 8.5 g TSS·m-2·d-1) while in the PBR it was 25.6 ± 26.8 mg TSS·L-1·d-1; the average nitrogen removal was 20 ± 29% (maximum 78%) and 22 ± 29% (maximum 71%) in the raceway and in the column, respectively. Nevertheless, nitrification had a key role as 61 ± 24% and 52 ± 32% of the nitrogen load was oxidized in the raceway and in the column, respectively.
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Affiliation(s)
- A Pizzera
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - D Scaglione
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - M Bellucci
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy
| | - F Marazzi
- Università degli Studi di Milano, Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - V Mezzanotte
- Università degli Studi di Milano, Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milano, Italy
| | - K Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, Cremona, Rivolta d'Adda, Italy
| | - E Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci 32, 20133 Milano, Italy.
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20
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Masi F, Rizzo A, Bresciani R, Martinuzzi N, Wallace SD, Van Oirschot D, Macor F, Rossini T, Fornaroli R, Mezzanotte V. Lessons learnt from a pilot study on residual dye removal by an aerated treatment wetland. Sci Total Environ 2019; 648:144-152. [PMID: 30114585 DOI: 10.1016/j.scitotenv.2018.08.113] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Treatment wetlands (TWs) have shown good capacity in dye removal from textile wastewater. However, the high hydraulic retention times (HRTs) required by these solutions and the connected high area requirements, remain a big drawback towards the application of TWs for dye treatment at full scale. Aerated TWs are interesting intensified solutions that attempt to reduce the TW required area. Therefore, an aerated CW pilot plant, composed of a 20 m2 horizontal subsurface flow TW (HF) and a 21 m2 Free Water System (FWS), equipped with aeration pipelines, was built and monitored to investigate the potential reduction of required area for dye removal from the effluent wastewater of a centralized wastewater treatment plant (WWTP). During a 8 months long study, experimenting with different hydraulic retention times (HRTs - 1.2, 2.6 and 3.5 days) and aeration modes (intermittent and continuous), the pilot plant has shown a normal biological degradation for organic matter and nutrients, while the residual dye removal has been very low, as demonstrated by the absorbance measure at three wavelengths: at 426 nm (blue) the removal varies from -55% at influent absorbance of 0.010 to 41% at 0.060; at 558 nm (yellow) the removal is negative at 0.005 (-58%) and high at higher influent concentrations (72% at 0.035 of absorbance for the inlet); at 660 nm (red) -82% of removal efficiency was obtained at influent absorbance of 0.002 and 74% at 0.010. These results are a consequence of the biological oxidation processes taking place in the WWTP, so that the residual dye seems to be resistant to further aerobic degradation. Therefore, TWs enhanced by aeration can provide only a buffer effect on peak dye concentrations.
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Affiliation(s)
- F Masi
- Iridra Srl, Via La Marmora 51, 50121 Florence, Italy.
| | - A Rizzo
- Iridra Srl, Via La Marmora 51, 50121 Florence, Italy
| | - R Bresciani
- Iridra Srl, Via La Marmora 51, 50121 Florence, Italy
| | - N Martinuzzi
- Iridra Srl, Via La Marmora 51, 50121 Florence, Italy
| | | | | | | | - T Rossini
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Science, Italy
| | - R Fornaroli
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Science, Italy
| | - V Mezzanotte
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Science, Italy
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21
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Rossi S, Bellucci M, Marazzi F, Mezzanotte V, Ficara E. Activity assessment of microalgal-bacterial consortia based on respirometric tests. Water Sci Technol 2018; 78:207-215. [PMID: 30101803 DOI: 10.2166/wst.2018.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Respirometric techniques are useful tools to evaluate bacterial activities in activated sludge processes due to their fast execution and the possibility to obtain several kinetic parameters from a single test. Using such techniques in microalgae-bacteria consortia treating wastewater could allow a better understanding of mutual interactions between the microbial populations as a function of environmental parameters. This work aims at developing and testing a novel experimental respirometric protocol to determine oxygen uptake rates and oxygen production rates by a microalgae-bacteria consortium. The defined protocol is characterized by alternating light/dark regimes and by dosing substrates/inhibitors to selectively activate/inactivate microalgal and bacterial metabolisms. The protocol was then applied on microalgal and bacterial consortia, which were grown on the liquid fraction of black water from biogas plants fed on agricultural and municipal waste sludge. Results elucidate the presence and activity of microalgae and nitrifying bacteria in the tested systems, suggesting that the respirometric tests could be included into monitoring procedures of photobioreactors/algal ponds.
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Affiliation(s)
- S Rossi
- Dipartimento di Ingegneria Civile e Ambientale (DICA), Politecnico di Milano, P.zza L. da Vinci 32, Milano 20133, Italy E-mail:
| | - M Bellucci
- Dipartimento di Ingegneria Civile e Ambientale (DICA), Politecnico di Milano, P.zza L. da Vinci 32, Milano 20133, Italy E-mail:
| | - F Marazzi
- Dipartimento di Scienze dell'Ambiente e della Terra (DISAT), Università degli Studi di Milano - Bicocca, P.zza della Scienza 1, Milano 20126, Italy
| | - V Mezzanotte
- Dipartimento di Scienze dell'Ambiente e della Terra (DISAT), Università degli Studi di Milano - Bicocca, P.zza della Scienza 1, Milano 20126, Italy
| | - E Ficara
- Dipartimento di Ingegneria Civile e Ambientale (DICA), Politecnico di Milano, P.zza L. da Vinci 32, Milano 20133, Italy E-mail:
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22
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Turolla A, Cattaneo M, Marazzi F, Mezzanotte V, Antonelli M. Antibiotic resistant bacteria in urban sewage: Role of full-scale wastewater treatment plants on environmental spreading. Chemosphere 2018; 191:761-769. [PMID: 29080537 DOI: 10.1016/j.chemosphere.2017.10.099] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/01/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
The presence of antibiotic resistant bacteria (ARB) in wastewater was investigated and the role of wastewater treatment plants (WWTPs) in promoting or limiting antibiotic resistance was assessed. Escherichia coli (E. coli) and total heterotrophic bacteria (THB) resistance to ampicillin, chloramphenicol and tetracycline was monitored in three WWTPs located in Milan urban area (Italy), differing among them for the operating parameters of biological process, for the disinfection processes (based on sodium hypochlorite, UV radiation, peracetic acid) and for the discharge limits to be met. Wastewater was collected from three sampling points along the treatment sequence (WWTP influent, effluent from sand filtration, WWTP effluent). Antibiotic resistance to ampicillin was observed both for E. coli and for THB. Ampicillin resistant bacteria in the WWTP influents were 20-47% of E. coli and 16-25% of THB counts. A limited resistance to chloramphenicol was observed only for E. coli, while neither for E. coli nor for THB tetracycline resistance was observed. The biological treatment and sand filtration led to a decrease in the maximum percentage of ampicillin-resistant bacteria (20-29% for E. coli, 11-21% for THB). However, the conventionally adopted parameters did not seem adequate to support an interpretation of WWTP role in ARB spread. Peracetic acid was effective in selectively acting on antibiotic resistant THB, unlike UV radiation and sodium hypochlorite. The low counts of E. coli in WWTP final effluents in case of agricultural reuse did not allow to compare the effect of the different disinfection processes on antibiotic resistance.
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Affiliation(s)
- A Turolla
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - M Cattaneo
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - F Marazzi
- Università degli Studi di Milano Bicocca, DISAT, Piazza della Scienza 1, 20126 Milano, Italy
| | - V Mezzanotte
- Università degli Studi di Milano Bicocca, DISAT, Piazza della Scienza 1, 20126 Milano, Italy
| | - M Antonelli
- Politecnico di Milano, Department of Civil and Environmental Engineering - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
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23
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Di Nica V, Gallet J, Villa S, Mezzanotte V. Toxicity of Quaternary Ammonium Compounds (QACs) as single compounds and mixtures to aquatic non-target microorganisms: Experimental data and predictive models. Ecotoxicol Environ Saf 2017; 142:567-577. [PMID: 28494277 DOI: 10.1016/j.ecoenv.2017.04.028] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/24/2017] [Accepted: 04/13/2017] [Indexed: 05/07/2023]
Abstract
The toxic effects of five Quaternary Ammonium Compounds (QACs) that are widely used as active ingredients in personal care products were assessed using the bioluminescent bacterium Aliivibrio fischeri (formerly Vibrio fischeri) (Microtox® test system). The experimental results showed a relevant toxicity for almost all of the single QACs, with IC50 values lower than 1mgL-1. Analysis of the mode of action through the application of the Quantitative Structure-Activity Relationship (QSAR) models indicated an a-specific reactivity for most of the QACs toward A. fischeri. Only hexadecyl trimethyl ammonium chloride (ATMAC-16) behaved as a polar-narcotic, with a low reactivity toward the bacterial cell membrane. The concentration response curves of the different binary and multicomponent mixtures of QACs were also evaluated with respect to the predictions from the Concentration Addition (CA) and Independent Action (IA) models. For almost all of the binary and multicomponent mixtures (7 out of 11 mixtures tested), an agreement between the experimental and predicted ICx was observed and confirmed via application of the Model Deviation Ratio (MDR). In four cases, some deviations from the expected behaviour were observed (potential antagonistic and synergistic interactions) at concentrations on the order of hundreds of µgL-1, which could be of environmental concern, especially in the case of synergistic effects. The analysis of aquatic ecotoxicity data and the few available values of the measured environmental concentrations (MECs) from the literature for wastewaters and receiving waterbodies suggest that a potential risk toward aquatic life cannot be excluded.
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Affiliation(s)
- V Di Nica
- Dept. of Earth and Environmental Sciences, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy.
| | - J Gallet
- Unités de Formation et de Recherche - Sciences Fondamentales et Appliquées, Université Savoie Mont-Blanc, Le Bourget du Lac Cedex 73376, France
| | - S Villa
- Dept. of Earth and Environmental Sciences, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - V Mezzanotte
- Dept. of Earth and Environmental Sciences, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
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24
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Marazzi F, Sambusiti C, Monlau F, Cecere S, Scaglione D, Barakat A, Mezzanotte V, Ficara E. A novel option for reducing the optical density of liquid digestate to achieve a more productive microalgal culturing. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.03.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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25
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Bonaiti S, Calderon B, Collina E, Lasagni M, Mezzanotte V, Saez NA, Fullana A. Nitrogen activation of carbon-encapsulated zero-valent iron nanoparticles and influence of the activation temperature on heavy metals removal. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1755-1315/64/1/012070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Zanotto C, Bissa M, Illiano E, Mezzanotte V, Marazzi F, Turolla A, Antonelli M, De Giuli Morghen C, Radaelli A. Identification of antibiotic-resistant Escherichia coli isolated from a municipal wastewater treatment plant. Chemosphere 2016; 164:627-633. [PMID: 27635645 DOI: 10.1016/j.chemosphere.2016.08.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 08/05/2016] [Accepted: 08/08/2016] [Indexed: 06/06/2023]
Abstract
The emergence and diffusion of antibiotic-resistant bacteria has been a major public health problem for many years now. In this study, antibiotic-resistance of coliforms and Escherichia coli were investigated after their isolation from samples collected in a municipal wastewater treatment plant in the Milan area (Italy) along different points of the treatment sequence: inflow to biological treatment; outflow from biological treatment following rapid sand filtration; and outflow from peracetic acid disinfection. The presence of E. coli that showed resistance to ampicillin (AMP) and chloramphenicol (CAF), used as representative antibiotics for the efficacy against Gram-positive and Gram-negative bacteria, was evaluated. After determining E. coli survival using increasing AMP and CAF concentrations, specific single-resistant (AMPR or CAFR) and double-resistant (AMPR/CAFR) strains were identified among E. coli colonies, through amplification of the β-lactamase Tem-1 (bla) and acetyl-transferase catA1 (cat) gene sequences. While a limited number of CAFR bacteria was observed, most AMPR colonies showed the specific resistance genes to both antibiotics, which was mainly due to the presence of the bla gene sequence. The peracetic acid, used as disinfection agent, showed to be very effective in reducing bacteria at the negligible levels of less than 10 CFU/100 mL, compatible with those admitted for the irrigation use of treated waters.
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Affiliation(s)
- Carlo Zanotto
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Vanvitelli, 32, 20129, Milan, Italy.
| | - Massimiliano Bissa
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti, 9, 20133, Milan, Italy.
| | - Elena Illiano
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti, 9, 20133, Milan, Italy.
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), University of Milan Bicocca, Piazza della Scienza 1, 20126, Milan, Italy.
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences (DISAT), University of Milan Bicocca, Piazza della Scienza 1, 20126, Milan, Italy.
| | - Andrea Turolla
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
| | - Manuela Antonelli
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
| | | | - Antonia Radaelli
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti, 9, 20133, Milan, Italy; Cellular and Molecular Pharmacology Section, National Research Council (CNR) Institute of Neurosciences, University of Milan, Via Vanvitelli, 32, 20129, Milan, Italy.
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27
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Fornaroli R, Cabrini R, Sartori L, Marazzi F, Canobbio S, Mezzanotte V. Optimal flow for brown trout: Habitat - prey optimization. Sci Total Environ 2016; 566-567:1568-1578. [PMID: 27320735 DOI: 10.1016/j.scitotenv.2016.06.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 06/08/2016] [Accepted: 06/08/2016] [Indexed: 06/06/2023]
Abstract
The correct definition of ecosystem needs is essential in order to guide policy and management strategies to optimize the increasing use of freshwater by human activities. Commonly, the assessment of the optimal or minimum flow rates needed to preserve ecosystem functionality has been done by habitat-based models that define a relationship between in-stream flow and habitat availability for various species of fish. We propose a new approach for the identification of optimal flows using the limiting factor approach and the evaluation of basic ecological relationships, considering the appropriate spatial scale for different organisms. We developed density-environment relationships for three different life stages of brown trout that show the limiting effects of hydromorphological variables at habitat scale. In our analyses, we found that the factors limiting the densities of trout were water velocity, substrate characteristics and refugia availability. For all the life stages, the selected models considered simultaneously two variables and implied that higher velocities provided a less suitable habitat, regardless of other physical characteristics and with different patterns. We used these relationships within habitat based models in order to select a range of flows that preserve most of the physical habitat for all the life stages. We also estimated the effect of varying discharge flows on macroinvertebrate biomass and used the obtained results to identify an optimal flow maximizing habitat and prey availability.
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Affiliation(s)
- Riccardo Fornaroli
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy.
| | - Riccardo Cabrini
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
| | - Laura Sartori
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
| | - Sergio Canobbio
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
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28
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Sartori L, Canobbio S, Fornaroli R, Cabrini R, Marazzi F, Mezzanotte V. COD, nutrient removal and disinfection efficiency of a combined subsurface and surface flow constructed wetland: A case study. Int J Phytoremediation 2016; 18:416-422. [PMID: 26552725 DOI: 10.1080/15226514.2015.1109601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A constructed wetland system composed of a subsurface flow wetland, a surface flow wetland and a facultative pond was studied from July 2008 until May 2012. It was created to treat the domestic sewage produced by a hamlet of 150 inhabitants. Monthly physicochemical and microbiological analyses were carried out in order to evaluate the removal efficiency of each stage of the process and of the total treatment system. Pair-wise Student's t-tests showed that the mean removal of each considered parameter was significantly different (α = 0.05) between the various treatment phases. Two-way ANOVA and Tukey's HSD tests were used to find significant differences between wetland types and seasons in the removal efficiency of the considered water quality parameters. Significant differences in percent removal efficiency between the treatment phases were observed for total phosphorus, total nitrogen, ammonia nitrogen and organic load (expressed as Chemical Oxygen Demand). In general, the wastewater treatment was carried by the sub-superficial flow phase mainly, both in growing season and in quiescence season. Escherichia coli removal ranged from 98% in quiescence season to >99% in growing season (approximately 2-3 orders of magnitude). The inactivation of fecal bacteria was not influenced by the season, but only by the treatment phase.
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Affiliation(s)
- Laura Sartori
- a DISAT, Università degli Studi di Milano-Bicocca , Milano , Italy
| | - Sergio Canobbio
- a DISAT, Università degli Studi di Milano-Bicocca , Milano , Italy
| | | | - Riccardo Cabrini
- a DISAT, Università degli Studi di Milano-Bicocca , Milano , Italy
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Mezzanotte V, Marazzi F, Bissa M, Pacchioni S, Binelli A, Parolini M, Magni S, Ruggeri FM, De Giuli Morghen C, Zanotto C, Radaelli A. Removal of enteric viruses and Escherichia coli from municipal treated effluent by zebra mussels. Sci Total Environ 2016; 539:395-400. [PMID: 26372942 DOI: 10.1016/j.scitotenv.2015.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/01/2015] [Accepted: 09/01/2015] [Indexed: 06/05/2023]
Abstract
Dreissena polymorpha is a widespread filter-feeder species, resistant to a broad range of environmental conditions and different types of pollutants,which has recently colonized Italian freshwaters. Although widely used to monitor pollution in freshwater environments, this species is also an important food source for some fish and water birds. It can also be used to concentrate or remove particulate organic matter to interrupt avian-to-human transmission of pollutants and control health risks for animals and humans. In this study, the accumulation/inactivation in D. polymorpha of human health-related spiked enteric viruses was described. The removal of endogenous Escherichia coli, the classical indicator of fecal contamination,was tested as well.Our preliminary lab-scale results demonstrate that zebra mussels can reduce significantly poliovirus titer after 24 h and rotavirus titer after 8 h. E. coli counts were also reduced in the presence of zebra mussels by about 1.5 log after 4 h and nearly completely after 24 h. The fate of the two enteric viruses after concentration by zebra mussels was also investigated after mechanical disruption of the tissues. To our knowledge, the accumulation from water and inactivation of human health-related enteric viruses by zebra mussels has never been reported.
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Affiliation(s)
- Valeria Mezzanotte
- Department of Earth and Environmental Sciences, University of Milan Bicocca, Piazza della Scienza, 1, 20126 Milan, Italy.
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences, University of Milan Bicocca, Piazza della Scienza, 1, 20126 Milan, Italy.
| | - Massimiliano Bissa
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti, 9, 20133 Milan, Italy.
| | - Sole Pacchioni
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Vanvitelli, 32, 20129 Milan, Italy.
| | - Andrea Binelli
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy.
| | - Marco Parolini
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy.
| | - Stefano Magni
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy.
| | - Franco M Ruggeri
- Department of Veterinary Public Health & Food Safety, I.S.S., Viale Regina Elena 299, 00161 Rome, Italy.
| | - Carlo De Giuli Morghen
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Vanvitelli, 32, 20129 Milan, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, University of Milan, Via Vanvitelli, 32, 20129 Milan, Italy.
| | - Carlo Zanotto
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Vanvitelli, 32, 20129 Milan, Italy.
| | - Antonia Radaelli
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti, 9, 20133 Milan, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, University of Milan, Via Vanvitelli, 32, 20129 Milan, Italy.
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Mezzanotte V, Anzano M, Collina E, Marazzi FA, Lasagni M. Distribution and Removal of Polycyclic Aromatic Hydrocarbons in Two Italian Municipal Wastewater Treatment Plants in 2011–2013. Polycycl Aromat Compd 2015. [DOI: 10.1080/10406638.2014.957409] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The paper reports the results of an experiment to assess the feasibility of including a photobioreactor within the design of a wastewater treatment plant, growing microalgae on the centrate from anaerobic sludge dewatering. The growth of algal biomass would take advantage of the available nitrogen and provide a substrate for biogas production by anaerobic digestion. Tests were carried out by semi-continuously feeding a photobioreactor with a centrate-effluent blend and by increasing the fraction of centrate. The experimental results show that the centrate does not induce any toxicity and, on the contrary, can be well utilized by microalgae, whose average specific growth rate (μ), on centrate as such, was between 0.04 and 0.06 d(-1). The maximum biomass concentration in the photobioreactor effluent was 1.6 gSS/L at 10 days HRT (hydraulic retention time). Methane production tests led to biochemical methane production values of 335 ± 39, and 284 ± 68 mL 0°C, 1 atm CH4/g VS for the two tested samples, in agreement with literature values. Settling tests show that the settling capacity of microalgae, although satisfactory, could be effectively improved after mixing with activated sludge, confirming the potential to use the existing primary settler for microalgae thickening in order to feed microalgae for anaerobic digestion with primary/secondary sludge.
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Affiliation(s)
- E Ficara
- Politecnico di Milano, DICA, P.zza L. da Vinci, 32, 20133 Milano, Italy
| | - A Uslenghi
- SEAM Engineering s.r.l., Via Cavour 2, 22074 Lomazzo (CO), Italy
| | - D Basilico
- SEAM Engineering s.r.l., Via Cavour 2, 22074 Lomazzo (CO), Italy
| | - V Mezzanotte
- Dipartimento di Scienze dell'Ambiente e del Territorio e di Scienze della Terra, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 1 20126 Milano, Italy E-mail:
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32
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Mezzanotte V, Fornaroli R, Canobbio S, Zoia L, Orlandi M. Colour removal and carbonyl by-production in high dose ozonation for effluent polishing. Chemosphere 2013; 91:629-634. [PMID: 23363621 DOI: 10.1016/j.chemosphere.2013.01.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 01/02/2013] [Accepted: 01/03/2013] [Indexed: 06/01/2023]
Abstract
Experimental tests have been conducted to investigate the efficiency and the by-product generation of high dose ozonation (10-60 mg O3 L(-1)) for complete colour removal from a treated effluent with an important component of textile dyeing wastewater. The effluent is discharged into an effluent-dominated stream where no dilution takes place, and, thus, the quality requirement for the effluents is particularly strict. 30, 60 and 90 min contact times were adopted. Colour was measured as absorbance at 426, 558 and 660 nm wavelengths. pH was monitored throughout the experiments. The experimental work showed that at 50 mg L(-1) colour removal was complete and at 60 mg O3 L(-1) the final aldehyde concentration ranged between 0.72 and 1.02 mg L(-1). Glyoxal and methylglyoxal concentrations were directly related to colour removal, whereas formaldehyde, acetaldehyde, acetone and acrolein were not. Thus, the extent of colour removal can be used to predict the increase in glyoxal and methylglyoxal concentrations. As colour removal can be assessed by a simple absorbance measurement, in contrast to the analysis of specific carbonyl compounds, which is much longer and complex, the possibility of using colour removal as an indicator for predicting the toxic potential of ozone by-products for textile effluents is of great value.
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Affiliation(s)
- V Mezzanotte
- Università degli Studi di Milano Bicocca, Piazza della Scienza 1, Milan, Italy.
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Siotto M, Zoia L, Tosin M, Degli Innocenti F, Orlandi M, Mezzanotte V. Monitoring biodegradation of poly(butylene sebacate) by Gel Permeation Chromatography, (1)H-NMR and (31)P-NMR techniques. J Environ Manage 2013; 116:27-35. [PMID: 23279999 DOI: 10.1016/j.jenvman.2012.11.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 11/22/2012] [Accepted: 11/30/2012] [Indexed: 06/01/2023]
Abstract
The increasing use of new generation plastics has been accompanied by the development of standard methods for studying their biodegradability. Generally, test methods are based on the measurement of CO(2) production, i.e. the mineralization degree of the tested materials. However, in order to describe the biodegradation process, the determination of the residual amount of tested material which remains in the environment and its chemical characterization can be very important. In this study, the biodegradation in soil of a model polyester (poly(butylene sebacate)) was monitored. Gel Permeation Chromatography and Nuclear Magnetic Resonance ((31)P-NMR and (1)H-NMR) were used in order to obtain information about the polyester structure and the possible by-products that can be found in soil during and at the end of the incubation. The polyester mineralization (i.e. the CO(2) production) was tested according to ASTM 5988 standard method for 245 days. When the polyester mineralization was about 21% and 37% (after 78 and 140 days of incubation) and at the end of the process (63% of mineralization, 100% if compared to the cellulose used as reference material), the soil was extracted with chloroform (solvent of the tested substance) and the extracts were analyzed using GPC and NMR acquisitions. The analytical acquisitions showed high molecular weight polyester in soil during the incubation (78 and 140 days): the polyester concentration decreased but its structure remained almost the same with a slow decreasing in molecular weight. At the end of the test (245 days) no film of the polyester could be extracted from the soil: NMR acquisitions and GPC analyses of the extracts suggested a strong degraded structure of the residual polyester. Even if at the end of the process only 63% of carbon had been lost by mineralization, the whole of the added polyester seems to have disappeared after about eight months of incubation, suggesting substantial biomass formation.
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Antonelli M, Turolla A, Mezzanotte V, Nurizzo C. Peracetic acid for secondary effluent disinfection: a comprehensive performance assessment. Water Sci Technol 2013; 68:2638-2644. [PMID: 24355852 DOI: 10.2166/wst.2013.542] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The paper is a review of previous research on secondary effluent disinfection by peracetic acid (PAA) integrated with new data about the effect of a preliminary flash-mixing step. The process was studied at bench and pilot scale to assess its performance for discharge in surface water and agricultural reuse (target microorganisms: Escherichia coli and faecal coliform bacteria). The purposes of the research were: (1) determining PAA decay and disinfection kinetics as a function of operating parameters, (2) evaluating PAA suitability as a disinfectant, (3) assessing long-term disinfection efficiency, (4) investigating disinfected effluent biological toxicity on some aquatic indicator organisms (Vibrio fischeri, Daphnia magna and Selenastrum capricornutum), (5) comparing PAA with conventional disinfectants (sodium hypochlorite, UV irradiation). PAA disinfection was capable of complying with Italian regulations on reuse (10 CFU/100 mL for E. coli) and was competitive with benchmarks. No regrowth phenomena were observed, as long as needed for agricultural reuse (29 h after disinfection), even at negligible concentrations of residual disinfectant. The toxic effect of PAA on the aquatic environment was due to the residual disinfectant in the water, rather than to chemical modification of the effluent.
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Affiliation(s)
- M Antonelli
- Politecnico di Milano, DICA - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy E-mail:
| | - A Turolla
- Politecnico di Milano, DICA - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy E-mail:
| | - V Mezzanotte
- Università degli Studi di Milano Bicocca, DISAT, Piazza della Scienza 1, 20126 Milano, Italy
| | - C Nurizzo
- Politecnico di Milano, DICA - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy E-mail:
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Azzellino A, Antonelli M, Canobbio S, Cevirgen S, Mezzanotte V, Piana A, Salvetti R. Searching for a compromise between ecological quality targets, and social and ecosystem costs for heavily modified water bodies (HMWBs): the Lambro-Seveso-Olona system case study. Water Sci Technol 2013; 68:681-688. [PMID: 23925198 DOI: 10.2166/wst.2013.277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The Lambro-Seveso-Olona (L-S-O) system derives from the human regulation of the natural hydrology of the territory around Milan city area. The average population density in the L-S-O area is among the highest in Italy and Europe. Industry is also highly developed in this basin: chemical, textile, paper, pulp and food industries being the most important ones. Although, at present, the L-S-O system no longer receives the untreated wastewaters of the Milan urban area, treated wastewaters constitute about half of the streamflow. Biotic communities in this river have a long history of poor quality status, having suffered great damage due to domestic and industrial discharges. Recently, new chemical quality standards for macropollutants have been set by the Italian legislation as support for the good ecological status according to the Water Framework Directive (WFD). This new index is very restrictive, and it makes it extremely challenging to achieve the water quality objectives for the L-S-O system. The aim of this study is to analyse through a modelling exercise the restoration possibilities of the L-S-O system, investigating both the source apportionment of the macropollutants, the discharge limits that should be set to achieve the good quality status and their corresponding cost.
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Affiliation(s)
- A Azzellino
- Politecnico di Milano - DICA - Environmental Engineering Div., Milano, Italy.
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Canobbio S, Azzellino A, Cabrini R, Mezzanotte V. A multivariate approach to assess habitat integrity in urban streams using benthic macroinvertebrate metrics. Water Sci Technol 2013; 67:2832-2837. [PMID: 23787325 DOI: 10.2166/wst.2013.166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Benthic macroinvertebrates are widely used as indicators of the health of freshwater ecosystems, responding both to water quality and to the hydromorphological integrity. In urban streams, evaluations can be tricky for the synergistic effects of multiple stressors and confounding factors. In these situations, the most broadly used multimetric indices can be used to assess the overall damage to the invertebrate community and, thus, the overall anthropogenic pressure, but they do not allow to understand the specific causal effects. Particularly, habitat loss due to morphological alterations can be difficult to evaluate, especially due to the often concurrent disturbance caused by water pollution. We used a multivariate approach to focus on the characteristics of the streams and rivers in an urban district and to define which macroinvertebrate metrics should be used to assess the influence of the different kinds of alteration in a severely damaged environment. Some metrics enabling the assessment of habitat loss (ratio of oligochaeta, ratio of filterers) were identified. These metrics may help to raise a better awareness in the evaluation of river restoration success and, thus, in the support of decision-making processes.
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Affiliation(s)
- S Canobbio
- DISAT, Università degli Studi di Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy.
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Siotto M, Sezenna E, Saponaro S, Innocenti FD, Tosin M, Bonomo L, Mezzanotte V. Kinetics of monomer biodegradation in soil. J Environ Manage 2012; 93:31-37. [PMID: 22054568 DOI: 10.1016/j.jenvman.2011.08.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 07/27/2011] [Accepted: 08/17/2011] [Indexed: 05/31/2023]
Abstract
In modern intensive agriculture, plastics are used in several applications (i.e. mulch films, drip irrigation tubes, string, clips, pots, etc.). Interest towards applying biodegradable plastics to replace the conventional plastics is promising. Ten monomers, which can be applied in the synthesis of potentially biodegradable polyesters, were tested according to ASTM 5988-96 (standard respirometric test to evaluate aerobic biodegradation in soil by measuring the carbon dioxide evolution): adipic acid, azelaic acid, 1,4-butanediol, 1,2-ethanediol, 1,6-hexanediol, lactic acid, glucose, sebacic acid, succinic acid and terephthalic acid. Eight replicates were carried out for each monomer for 27-45 days. The numerical code AQUASIM was applied to process the CO₂ experimental data in order to estimate values for the parameters describing the different mechanisms occurring to the monomers in soil: i) the first order solubilization kinetic constant, K(sol) (d⁻¹); ii) the first order biodegradation kinetic constant, K(b) (d⁻¹); iii) the lag time in biodegradation, t(lag) (d); and iv) the carbon fraction biodegraded but not transformed into CO₂, Y (-). The following range of values were obtained: [0.006 d⁻¹, 6.9 d⁻¹] for K(sol), [0.1 d⁻¹, 1.2 d⁻¹] for K(b), and [0.32-0.58] for Y; t(lag) was observed for azelaic acid, 1,2-ethanediol, and terephthalic acid, with estimated values between 3.0 e 4.9 d.
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Affiliation(s)
- Michela Siotto
- Università degli Studi di Milano Bicocca, Dipartimento di Scienze dell'Ambiente e del Territorio, Milano, Italy.
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Benvenuto F, Marín JM, Sancho JV, Canobbio S, Mezzanotte V, Hernández F. Simultaneous determination of triazines and their main transformation products in surface and urban wastewater by ultra-high-pressure liquid chromatography–tandem mass spectrometry. Anal Bioanal Chem 2010; 397:2791-805. [DOI: 10.1007/s00216-010-3712-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Bioassays were performed by commercially available kits on peracetic acid (PAA) solutions, at different concentrations, and on secondary effluents (from two different wastewater treatment plants) after disinfection at bench-scale, considering both samples containing residual active PAA and the same samples where residual PAA was quenched. Four indicator organisms were used: Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna, and Selenastrum capricornutum. The experiments lead to conclude that Thamnocephalus platyurus is a very sensitive organism, probably not adequate to perform a reliable toxicity assessment of effluents for monitoring purposes. The presence of specific organic compounds deriving from human metabolism and urban pollution, even at very low concentrations, can affect the results of bioassays, especially those performed on Vibrio fischeri. PAA is toxic for bacteria and crustaceans even at concentrations lower than the ones commonly used in wastewater disinfection (2-5 mg/L), while its effect on algae is smaller. The toxic effect on bacteria was expected, as PAA is used for disinfection, but its possible influence on biological processes in the receiving aquatic environment should be considered. Toxicity on crustaceans would confirm the fact that discharging disinfected effluents could raise some environmental problems.
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Affiliation(s)
- M Antonelli
- Politecnico di Milano, DIIAR-Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano.
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Saponaro S, Sezenna E, Degli Innocenti F, Mezzanotte V, Bonomo L. A screening model for fate and transport of biodegradable polyesters in soil. J Environ Manage 2008; 88:1078-87. [PMID: 17624656 DOI: 10.1016/j.jenvman.2007.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2006] [Revised: 05/07/2007] [Accepted: 05/25/2007] [Indexed: 05/16/2023]
Abstract
A numerical model for predicting the fate and transport of biodegradable polyester residues in soil, following successive applications of mulch film, was developed and applied. The polymer, applied on surface soil, was assumed to be converted into by-products (monomers), according to a first order kinetics with constant K(1deg). The monomers released were assumed to sorb on soil organic matter (according to a first-order kinetics with constant K(s)), to be leached with the seepage water, through vertical advection and hydrodynamic dispersion, and biodegraded (according to a first-order kinetics with constant K(b)). Results suggested that, to assess a possible build-up of mulch film (as a polymer) on the surface soil, the degradation constant K(1deg) relating the polymer conversion to by-products should be known, whereas the biodegradation constant K(b) indicates there is no danger of groundwater pollution. Likewise, on the basis of by-product concentration in deep soil, soil pollution should not occur.
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Affiliation(s)
- Sabrina Saponaro
- Politecnico di Milano, DIIAR, Sez. Ambientale, piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
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Mezzanotte V, Antonelli M, Citterio S, Nurizzo C. Wastewater disinfection alternatives: chlorine, ozone, peracetic acid, and UV light. Water Environ Res 2007; 79:2373-2379. [PMID: 18044353 DOI: 10.2175/106143007x183763] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Disinfection tests were carried out at pilot scale to compare the disinfection efficiency of ozone, sodium hypochlorite (NaOCl), peracetic acid (PAA), and UV irradiation. Total coliforms, fecal coliforms, and Escherichia coli were monitored as reference microorganisms. Total heterotrophic bacteria (THB) were also enumerated by cytometry. At similar doses, NaOCl was more effective than PAA, and its action was less affected by contact time. The results obtained by ozonation were comparable for total coliforms, fecal coliforms, and E. coli. On the contrary, some differences among the three indicators were observed for NaOCl, PAA, and UV. Differences increased with increasing values of the disinfectant concentration times contact time (C x t) and were probably the result of different initial counts, as total coliforms include fecal coliforms, which include E. coli. The UV irradiation lead to complete E. coli removals, even at low doses (10 to 20 mJ/cm2). Total heterotrophic bacteria appeared to be too wide a group to be a good disinfection indicator; no correlation was found among THB inactivation, dose, and contact time.
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Affiliation(s)
- V Mezzanotte
- Università degli Studi di Milano Bicocca, Milan, Italy.
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Abstract
The paper summarizes the results of a bench-scale study to evaluate the feasibility of using peracetic acid (PAA) as a substitute for sodium hypochlorite both for discharge into surface water and for agricultural reuse. Trials were carried out with increasing doses (1, 2, 3, 5, 10, and 15 mg/L) and contact times (6, 12, 18, 36, 42, and 54 minutes) to study disinfectant decay and bacterial removal and regrowth, using fecal coliform and Escherichia coli (E. coli) as process efficiency indicators. Peracetic acid decay kinetics was evaluated in tap water and wastewater; in both cases, PAA decays according to first-order kinetics with respect to time, and a correlation was found between PAA oxidative initial consumption and wastewater characteristics. The PAA disinfection efficiency was correlated with operating parameters (active concentration and contact time), testing different kinetic models. Two data groups displaying a different behavior on the basis of initial active concentration ranges (1 to 2 mg/L and 5 to 15 mg/L, respectively) can be outlined. Both groups had a "tailing-off" inactivation curve with respect to time, but the second one showed a greater inactivation rate. Moreover, the effect of contact time was greater at the lower doses. Hom's model, used separately for the two data groups, was found to best fit experimental data, and the disinfectant active concentration appears to be the main factor affecting log-survival ratios. Moreover, the S-model better explains the initial resistance of E. coli, especially at low active concentrations (< 2 mg/L) and short contact times (< 12 minutes). Microbial counts, performed by both traditional methods and flow cytometry, immediately and 5 hours after sample collection (both with or without residual PAA inactivation), showed that no appreciable regrowth took place after 5 hours, neither for coliform group bacteria, nor for total heterotrophic bacteria.
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Affiliation(s)
- S Rossi
- DIIAR Environmental Section, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy.
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Abstract
The paper summarizes the results of a bench-scale study to evaluate the long-term disinfection efficiency of peracetic acid (PAA). Bacterial counts were repeated 5, 24, and 29 h after the end of the disinfection test, to simulate real re-growth conditions (no residual quenching) and, for the 5 h interval, the potential re-growth (quenching of residual PAA). Fecal coliforms, Escherichia coli, and total heterotrophic bacteria (THB) were enumerated by traditional plate count technique; THB were also enumerated by cytometry. After disinfection, the residual PAA concentration became negligible in about 5 to 11 h, depending on the tested doses. Microbial counts showed that no appreciable re-growth took place after 29 h for coliform group bacteria. For THB, the previously cited enumeration techniques gave different results in re-growth tests, especially for the lowest PAA doses. Indeed plate count technique evaluates the ability to form colonies, while cytometry enumerates intact membrane cells. No regrowth took place, even when no residual disinfectant was present, suggesting that bacteria are unable, even at the lowest doses, to repair damage caused by the PAA disinfecting action. PAA was found to be an efficient disinfecting agent, not only as a bacteriostatic, but also as a bactericide.
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Affiliation(s)
- M Antonelli
- DIIAR-Environmental Section, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy.
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Mezzanotte V, Prato N, Sgorbati S, Citterio S. Analysis of microbiological characteristics of wastewater along the polishing sequence of a treatment plant. Water Environ Res 2004; 76:463-467. [PMID: 15523792 DOI: 10.2175/106143004x151545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Microbial populations were studied by plate counts and flow cytometry along the polishing sequence of a wastewater plant. The comparison between plate count and flow cytometry showed comparable trends, but plate counts detected less than 10% of the total intact bacteria counted by flow cytometry. Six months monitoring showed that, in spite of the high ozone doses, the disinfection effect of ozonation was insignificant. This is in agreement with the variability of ozone demand, not only related to chemical oxygen demand or total suspended solids. Membrane-intact bacterial population decreased after ozonation, slightly regrew between ozone and biological activated carbon (BAC), and sharply increased after BAC, probably for damaged bacteria regrowth and saprophytes release; BAC effluent had the highest bacterial counts. Preliminary investigations on the effluent microbial composition showed that the beta Proteobacteria subclass is the most represented in the BAC effluent, whereas the alpha subclass is the most sensitive to ozone effect.
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Abstract
Six alcohol ethoxylates (C5E2, C6E4, C7E4, C8E2, C8E4, C10E4) and two fatty acid esters were tested at lab-scale for degradation in anaerobic and aerobic conditions and oxygen uptake rate (OUR). Anaerobic removal of C5E2, C6E4 and C7E4 improved with increasing number of ethoxy groups (E) and decreasing length of the alkyl chain (C). Their aerobic removal was also great but lower than the anaerobic values. C8E2, C8E4 and C10E4 were adsorbed on sludge but not degraded in anaerobic conditions, while they were efficiently removed under aerobiosis. The fatty acid esters were removed to a level between the two alcohol ethoxylates groups in both anaerobiosis and aerobiosis. The measured OUR confirmed the different behaviours of the three groups of compounds.
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Affiliation(s)
- V Mezzanotte
- DISAT, Università degli Studi di Milano-Bicocca, P.della Scienza, 1, 20126 Milano, Italy.
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Abstract
The present paper deals with a laboratory-scale study of anaerobic treatment of two commercial mixtures (LS2, LT7) of alcohol ethoxylates with 8-14 carbon atoms and 2 and 7 ethoxy groups. Tests were carried out in batch, with a 2 g l(-1) single dose, and in semibatch, with daily 0.2 g l(-1) doses. The behaviour of the tested mixtures was different: anaerobic sludge adsorption was the main removal process for LS2, while adsorption was less significant and biodegradation was more important for LT7. These differences appeared to be mainly related to the ethoxy portion length determining the extent of biodegradability and adsorption.
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Affiliation(s)
- V Mezzanotte
- DISAT, Università degli Studi di Milano Bicocca, Italy.
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