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Maria Gabriella Giustra
Faculty of Engineering and Architecture, University of Enna KORE, Cittadella Universitaria, 94100 Enna, Italy

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Journal article
Published: 03 March 2021 in Applied System Innovation
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Hydrothermal carbonization (HTC) is a promising thermochemical pre-treatment to convert waste biomass into solid biofuels. However, the process yields large amounts of organic process water (PW), which must be properly disposed of or reused. In this study, the PW produced from the hydrothermal carbonization of lemon peel waste (LP) was recycled into HTC process of LP with the aim of maximize energy recovery from the aqueous phase while saving water resources and mitigating the overall environmental impact of the process. The effects of HTC temperature on the properties of solid and liquid products were investigated during PW recirculation. Experiments were carried out at three different operating temperatures (180, 220, 250 °C), fixed residence times of 60 min, and solid to liquid load of 20 wt%, on a dry basis. Hydrochars were characterized in terms of proximate analysis and higher heating values while liquid phases were analyzed in terms of pH and total organic carbon content (TOC). PW recirculation led to a solid mass yield increase and the effect was more pronounced at lower HTC temperature. The increase of solid mass yield, after recirculation steps (maximum increase of about 6% at 180 °C), also led to a significant energy yield enhancement. Results showed that PW recirculation is a viable strategy for a reduction of water consumption and further carbon recovery; moreover preliminary results encourage for an in-depth analysis of the effects of the PW recirculation for different biomasses and at various operating conditions.

ACS Style

Antonio Picone; Maurizio Volpe; Maria Giustra; Gaetano Di Bella; Antonio Messineo. Hydrothermal Carbonization of Lemon Peel Waste: Preliminary Results on the Effects of Temperature during Process Water Recirculation. Applied System Innovation 2021, 4, 19 .

AMA Style

Antonio Picone, Maurizio Volpe, Maria Giustra, Gaetano Di Bella, Antonio Messineo. Hydrothermal Carbonization of Lemon Peel Waste: Preliminary Results on the Effects of Temperature during Process Water Recirculation. Applied System Innovation. 2021; 4 (1):19.

Chicago/Turabian Style

Antonio Picone; Maurizio Volpe; Maria Giustra; Gaetano Di Bella; Antonio Messineo. 2021. "Hydrothermal Carbonization of Lemon Peel Waste: Preliminary Results on the Effects of Temperature during Process Water Recirculation." Applied System Innovation 4, no. 1: 19.

Journal article
Published: 09 January 2020 in Applied Sciences
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Two experimental campaigns were conducted to optimize the applicability of the Sediment Washing treatment on the marine sediments of Augusta Bay contaminated with heavy metals and total petroleum hydrocarbons (TPH). In the first campaign were used EDTA, citric acid, and acetic acid to removal only heavy metals (Ni, Cu, Zn, Cr, and Hg) from the sediments, while in the second campaign EDTA, citric acid, and EDDS were used to removal heavy metals (Ni, Cu, Cr, and Pb) and TPH. The tests were conducted at different pH values and contact times with 1:10 solid:liquid weight ratio. In the first experimental, at pH values 4, contact time 3 h, and citric acid, high removal efficiencies (78–82%) have been obtained for Ni, Cu, Zn, and Cr metals, while, in the second experimental campaign, at pH value 4, contact time 0.5 h, and citric acid, high removal efficiencies have been achieved especially for Pb and TPH. Finally, on the basis of the results obtained, a conceptual sediment washing treatment layout was proposed and the related costs estimated.

ACS Style

Lucia Lumia; Maria Gabriella Giustra; Gaspare Viviani; Gaetano Di Bella. Washing Batch Test of Contaminated Sediment: The Case of Augusta Bay (SR, Italy). Applied Sciences 2020, 10, 473 .

AMA Style

Lucia Lumia, Maria Gabriella Giustra, Gaspare Viviani, Gaetano Di Bella. Washing Batch Test of Contaminated Sediment: The Case of Augusta Bay (SR, Italy). Applied Sciences. 2020; 10 (2):473.

Chicago/Turabian Style

Lucia Lumia; Maria Gabriella Giustra; Gaspare Viviani; Gaetano Di Bella. 2020. "Washing Batch Test of Contaminated Sediment: The Case of Augusta Bay (SR, Italy)." Applied Sciences 10, no. 2: 473.

Journal article
Published: 07 May 2019 in Sustainability
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The European Union is committed to enforce limitations to water pollution through specific directives (UWWTD 91/271/EEC). The delay of some EU member states in transposing these directives has had an impact on the quality of the wastewater treatment system. Therefore, it is necessary to intervene with adjustment procedures and construction of new plants. The aim of the study is to carry out an economic feasibility assessment for the construction costs of an urban wastewater treatment plant of medium-low capacity (

ACS Style

Giovanna Acampa; Maria Gabriella Giustra; Claudia Mariaserena Parisi. Water Treatment Emergency: Cost Evaluation Tools. Sustainability 2019, 11, 2609 .

AMA Style

Giovanna Acampa, Maria Gabriella Giustra, Claudia Mariaserena Parisi. Water Treatment Emergency: Cost Evaluation Tools. Sustainability. 2019; 11 (9):2609.

Chicago/Turabian Style

Giovanna Acampa; Maria Gabriella Giustra; Claudia Mariaserena Parisi. 2019. "Water Treatment Emergency: Cost Evaluation Tools." Sustainability 11, no. 9: 2609.

Journal article
Published: 01 October 2017 in Journal of Environmental Engineering
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In this study, the adsorption of granular activated carbon (GAC) was evaluated in the treatment of slop with the aim of reducing the organic matter concentration in terms of chemical oxygen demand (COD), dissolved organic carbon (DOC), and total petroleum hydrocarbons (TPH). The process was optimized for the oily wastewaters sampled from a floating tank of an oil coastal deposit in the Augusta Harbor (Sicily, Italy). In particular, both batch and dynamic tests were performed. Two different GACs were used and compared. In general, the application of the adsorption process was effective in the treatment of the slop. In fact, the percentages of removal, although rarely exceeding 65% in term of COD, reduced the overall organic load resulting from recalcitrant or poorly biodegradable substances (efficiency greater than 70–80% in terms of DOC and TPH). However, a pretreatment with 20 gGAC/L is also sustainable for the removal of the main contaminants and for the pretreatment of the wastewater, improving the treatment before a subsequent biological process.

ACS Style

M. G. Giustra; G. Di Bella. Shipboard Wastewater Treatment Using Granular Activated Carbon: Adsorption Test and Bioregeneration. Journal of Environmental Engineering 2017, 143, 06017007 .

AMA Style

M. G. Giustra, G. Di Bella. Shipboard Wastewater Treatment Using Granular Activated Carbon: Adsorption Test and Bioregeneration. Journal of Environmental Engineering. 2017; 143 (10):06017007.

Chicago/Turabian Style

M. G. Giustra; G. Di Bella. 2017. "Shipboard Wastewater Treatment Using Granular Activated Carbon: Adsorption Test and Bioregeneration." Journal of Environmental Engineering 143, no. 10: 06017007.

Article
Published: 04 August 2017 in Water
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Shipboard slop wastewaters are produced by the activity of washing of oil tankers with seawater, and are characterized by high salinity and hydrocarbons. In this context, harbor authorities are forced to respect the international regulation IMO-MARPOL 73/78 and they must treat slop wastewater before discharging to the sea. This study compared data from three stand-alone treatments working with the same real slop wastewater: (1) a chemical treatment of coagulation-flocculation with aluminum sulphate as coagulant and an anionic flocculant (A57), (2) a physical treatment of adsorption on granular activated carbon (GAC), (3) two biological treatments represented by a membrane bioreactor (MBR) and a moving bed biofilm reactor (MB-MBR). GAC treatment registered the highest removal efficiency of total petroleum hydrocarbons (ηTPH) next to 85%, since the activated carbon had excellent adsorption properties towards organic substances. The coagulation-flocculation treatment reported the lowest ηTPH ≈ 57% due to the presence of emulsified hydrocarbons that were not affected by the coagulant and flocculant action, so remaining in liquid phase. ηTPH ≈ 70% obtained with MB-MBR fed with 100% volume of slop, suggested biomass acclimation to salinity and hydrocarbons. Based on the results of each process, three main treatment chains are proposed depending on the hydrocarbons load of the real slop wastewater.

ACS Style

Riccardo Campo; Maria Gabriella Giustra; Gabriele Freni; Mauro De Marchis; Gaetano Di Bella. Characterization and Treatment Proposals of Shipboard Slop Wastewater Contaminated by Hydrocarbons. Water 2017, 9, 581 .

AMA Style

Riccardo Campo, Maria Gabriella Giustra, Gabriele Freni, Mauro De Marchis, Gaetano Di Bella. Characterization and Treatment Proposals of Shipboard Slop Wastewater Contaminated by Hydrocarbons. Water. 2017; 9 (8):581.

Chicago/Turabian Style

Riccardo Campo; Maria Gabriella Giustra; Gabriele Freni; Mauro De Marchis; Gaetano Di Bella. 2017. "Characterization and Treatment Proposals of Shipboard Slop Wastewater Contaminated by Hydrocarbons." Water 9, no. 8: 581.