Tonia Tommasi

Tonia Tommasi
Politecnico di Torino | polito · DISAT - Department of Applied Science and Technology

MS in Environmental Engineering, PhD in Chemical Engineering,

About

69
Publications
8,128
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1,186
Citations
Citations since 2017
34 Research Items
974 Citations
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250

Publications

Publications (69)
Article
Full-text available
Municipal solid waste (MSW) production in the world has increased by 60 % in recent years. Incineration of MSW reduces their volume in conjunction with energy recovery. Incineration produces two residues, namely bottom ash (BA) and fly ash (FA), with high concentration of heavy metals and organic pollutants, especially for FA, making them an enviro...
Article
Tuna represents one of the most consumed foods in many parts of the world. It is estimated that about 70% of the tuna's weight is discarded in the production of canned fillets. This work is focused on the optimization of production of an oil rich in omega-3 from the tuna viscera, provided by a canned tuna production company, using the Alcalase enzy...
Article
Full-text available
In this work, the co-immobilization of formate dehydrogenase (FDH) and glycerol dehydrogenase (GlyDH) enzymes is proposed to reduce CO2 into formic acid, an important chemical intermediate. The reduction of carbon dioxide is carried out by FDH to obtain formic acid, simultaneously, the GlyDH regenerated the nicotinamide cofactor in the reduced form...
Article
After cereal harvesting, rice is subjected to several milling processes to remove hull, germ, and bran and produce the final white rice. The bran represents around 10% of total grain weight and is usually considered as waste material. One of the most common rice bran applications is the extraction of rice bran oil, rich in γ-oryzanol, which has sho...
Article
Full-text available
Microplastics pollution is one of the main environmental challenges of our time, even though microplastics were observed for the first time almost 50 years ago. Microplastics—little plastic fragments smaller than 5 mm in size—are released from bigger plastic objects during their use, maintenance, or disposal. As their release is uncontrolled and mo...
Article
Full-text available
This study presents the immobilization with aldehyde groups (glyoxyl carbon felt) of alcohol dehydrogenase (ADH) and formate dehydrogenase (FDH) on carbon‐felt‐based electrodes. The compatibility of the immobilization method with the electrochemical application was studied with the ADH bioelectrode. The electrochemical regeneration process of nicot...
Article
The present work explains a practical and simple method to calculate the gas changing time of anaerobic systems. It is substantiated under the physics of gas-liquid transfer theory and allows researchers to obtain an approximate value of gas changing time with few measurements of the gas composition in the outlet of the reactor. The only analytical...
Article
Full-text available
Purpose This work studies the immobilization of two enzymes, the alcohol dehydrogenase (ADH) and the aldehyde dehydrogenase (AldDH) both from Saccharomyces cerevisiae , which could be used to produce high value-added molecules from carboxylic acids embedded in anaerobic digestate. Methods In particular, three mesoporous siliceous materials, with d...
Article
This study evaluated the key role of inoculum in mesophilic anaerobic digestion (AD) of Organic Fraction of Municipal Solid Waste. The effect of two different inocula, the mesophilic digestate of wastewater activated sludge (WAS) and the mesophilic digestate of cow-agriculture sludge (CAS), at three different substrate: inoculum ratios (1:2, 1:1 an...
Article
Cupriavidus necator owes its popularity to the ability to produce large amounts of the polyester poly (3-hydroxybutyric acid), or PHB. During the last decades, C. necator has earnt an increasing interest in the field of biopolymers and bioplastic production. This versatile bacterium can grow both autotrophically on a mixture of gases (e.g. hydrogen...
Article
Full-text available
Nowadays, phosphorus natural reserves are being depleted, while P fertilizers demand is increasing. Phosphorus is well contained in waste materials such as sewage sludge. Only a small amount (1–3%) of the soil total phosphorus is bioavailable for plant nutrition. More in detail, the present study focuses on the determination of the kinetics of bioa...
Article
The aim of this study is the evaluation of the environmental sustainability by means of Life Cycle Assessment (LCA) and economic profitability through Life Cycle Costing (LCC) of the 18 anaerobic digestion (AD) configurations carried out on Organic Fraction Municipal Solid Waste (OFMSW) at three Substrate Inoculum (S:I) ratios (1:2, 1:1 and 2:1) fo...
Article
Full-text available
Rice is one of the most important crops throughout the world, as it contributes toward satisfying the food demand of much of the global population. It is well known that rice production generates a considerable number of by-products, among which rice bran deserves particular attention. This by-product is exceptionally rich in nutrients, since it co...
Article
CaCO3 nanoparticles as filler have received considerable attention for the mechanical improvement that they provide to cements. However, their life-cycle impact on the environment remains almost unexplored, even if the cement industry is considered one of the largest CO2 emitters. In this perspective, this research work assessed a novel method for...
Article
This work studied the influence of the pore size and morphology of the mesoporous silica as support for formate dehydrogenase (FDH), the first enzyme of a multi-enzymatic cascade system to produce methanol, which catalyzes the reduction of carbon dioxide to formic acid. Specifically, a set of mesoporous silicas was modified with glyoxyl groups to i...
Chapter
Several billion tons of liquid and solid waste are produced every year globally, contributing to soil and water pollution, greenhouse gas emissions and loss of important nutrients, like C, N and P in the environment. On the other hand, soils are facing a strong reduction of organic matter content while agricultural, food and productive processes ma...
Article
The enzymatic strategy for methanol production starting from CO2 involves the use of three enzymes in series. The first enzyme of the series, which reduces CO2 to formic acid, is formate dehydrogenase (FDH). A problem with using free enzymes is their low stability. To overcome this limitation, the covalent immobilization on porous supports has been...
Article
Electrocatalytic (EC) and thermocatalytic (TC) conversion of CO2 to methanol are promising carbon capture and utilization technologies. Herein, these CO2-to-methanol conversion processes are analysed in terms of technical, environmental and economic feasibility. To this purpose, the catalytic performance of the same catalyst (CuO/ZnO/Al2O3) was eva...
Article
Incineration is the most common way to reduce the mass and the volume of municipal solid wastes. One of the most dangerous by-products of the incineration process is fly ash that contains a considerable amount of heavy metals. Therefore, its treatment is crucial to prevent the leaching of heavy metals into the environment. In the present work, two...
Article
Anaerobic digestates from sewage sludge (SSADs) are a by-product of the wastewater treatment process that still preserves a certain agronomic interest for its richness in plant nutrients and organic matter. Fertilizing properties of two liquid and two dewatered SSADs were tested on tomato plants (Solanum lycopersicum L.). Pot experiments were perfo...
Article
Wastewater production is rising all over the world and one of the most difficult problems is the disposal of sewage sludge (SS). It is known that SS contains certain quantities of added-value compounds, such as humic acids (HA) which in turn have beneficial effects on soil quality and plant growth. On the other hand, SS can retain many pollutants,...
Article
BACKGROUND The poly(3‐hydroxybutyrate) (PHB) is a polymer produced by Azotobacter vinelandii. The PHB production in a bioreactor is affected by oxygen transfer conditions. The aim of this study was to evaluate the PHB synthesis in extended batch of A. vinelandii, to obtain an operation curve (productivity versus oxygen transfer rate) and scale‐up t...
Article
Sewage sludge production in European countries has widely raised in the last decade and its fate is currently landfilling, incinerators, composting or land application. To explore its agronomic potential, the main target of this work is to understand the effects of anaerobic digestates from sewage sludge (SSAD). To this aim, four different SSADs (t...
Article
Full-text available
The characterization of anodic microbial communities is of great importance in the study of microbial fuel cells (MFCs). These kinds of devices mainly require a high abundance of anode respiring bacteria (ARB) in the anode chamber for optimal performance. This study evaluated the effect of different enrichments of environmental freshwater sediment...
Article
The new “Bioeconomy Strategy” document, which was issued by the European Commission in October 2018, encourages the exploitation of organic wastes according to a pyramidal hierarchy in which the extraction of valuable biomolecules, which will be used as they are or as precursors of high added value compounds, is a priority in biofuel production. Th...
Article
Full-text available
Extra virgin olive-oil (EVO) production is an important economic activity for several countries, especially in the Mediterranean area such as Spain, Italy, Greece and Tunisia. The two major by-products from olive oil production, solid-liquid Olive Pomace (OP) and the Olive Mill Waste Waters (OMWW), are still mainly disposed on soil, in spite of the...
Article
In order to power remote sensors and/or data transmission devices in an aquatic environment, sedimentary microbial fuel cells and floating microbial fuel cells have been proposed in the literature, representing a continuous source of renewable and sustainable energy. However, both classes of devices are characterized by large dimensions and are imm...
Preprint
Full-text available
Today plastic waste is the one of the largest components of household trash and it is one of the main causes of pollution of natural environment. Traditional plastics are carbon-based synthetic polymers that comes from non-renewable source such as petroleum. These materials are spread in all the productive sectors thanks to their low cost, durabili...
Article
The sea contains various microbes which have an ability to reduce and oxidize substances like iron, sulphur, and nitrate. Most of these processes happen in the seawater, but can also be applied for purification of wastewater. In the present work, a consortium of seawater bacteria has been used for the first time in a microbial fuel cell to reduce n...
Article
Energy sustainability analysis and durability of Microbial Fuel Cells (MFCs) as energy source are necessary in order to move from the laboratory scale to full-scale application. This paper focus on these two aspects by considering the energy performances of an original experimental test with MFC conducted for six months under an external load of 10...
Preprint
Full-text available
The sea contains various microbes which have an ability to reduce and oxidize substances like iron, sulphur, and nitrate. Most of these processes happen in the seawater, but can also be applied for purification of wastewater. In the present work, a consortium of seawater bacteria has been used for the first time in a microbial fuel cell to reduce ni...
Article
The effect of anodic pH on Microbial fuel cells (MFCs) inoculated with marine consortia was investigated to characterize the microbial community adaptation to possible pH environmental changes and to define the pH extreme boundaries beyond which MFCs do not run properly.Tests were conducted in triplicate using different feeding pH values (pHfeed) r...
Article
Full-text available
For the development of long lasting portable microbial fuel cells (MFCs) new strategies are necessary to overcome critical issues such as hydraulic pump system and the biochemical substrate retrieval overtime to sustain bacteria metabolism. The present work proposes the use of a synthetic solid anolyte (SSA), constituted by agar, carbonaceous and n...
Article
Three different single-lumen double-J ureteral stents of different materials were studied and compared after the insertion into a dynamic in vitro model with sterile artificial urine up to 6 months. The aim was to evaluate, at selected time steps of 1, 3, and 6 months, the material performances of the stents in preventing the formation of inorganic...
Article
Full-text available
In contemporary society we observe an everlasting permeation of electron devices, smartphones, portable computing tools. The tiniest living organisms on Earth could become the key to address this challenge: energy generation by bacterial processes from renewable stocks/waste through devices such as microbial fuel cells (MFCs). However, the applicat...
Conference Paper
We investigated the response of biofilm forming marine consortia in MFCs continuously fed with sodium acetate dissolved into synthetic sea water at different pH, ranging from 3 to 13. A 2-months test has been conducted in triplicate by using a circular dual-chamber MFC , with chemical cathode. The inoculum has been obtained through anaerobic enrich...
Article
A mixed microbial population naturally presents in seawater was used as active anodic biofilm of two Microbial Fuel Cells (MFCs), employing either a 2D commercial carbon felt or 3D carbon-coated Berl saddles as anode electrodes, with the aim to compare their electrochemical behavior under continuous operation. After an initial increase of the maxim...
Chapter
In this chapter the energy metabolism of hydrogen-producing bacteria (HPB) microorganisms is described. This method of hydrogen production depends principally on the activity of some essential enzymes such as hydrogenase and ferredoxin, and therefore a description of the mechanisms involved in dark H2 production is given. The principles of dark fer...
Chapter
This chapter focuses on the investigation of an easy and efficacious method of obtaining a hydrogen-producing bacteria (HPB) culture to the detriment of hydrogen-consuming bacteria (HCB), such as methanogens and homoacetogenic bacteria. Although the use of mixed microflora is more viable from both the practical and biological points of view, import...
Chapter
In this chapter the analysis of net energy production by H2 in anaerobic digestion (AD) is considered. The net energy production has previously been defined and evaluated by using the experimental data reported in Chap. 4, taking into account the effect of temperature on H2 production.
Chapter
In this chapter the feasibility of hydrogen production from organic waste (OW) is highlighted. Possible sources are the residue of municipal solid waste (MSW) sorting by mechanical/physical treatment, the OW separately collected from households and the waste produced along the entire food production chain.
Chapter
In this chapter the analysis of the temperature effect on bioH2 production is taken into account. Temperature is a very important factor, because it can affect the activity of HPB by influencing the activity of some essential enzymes such as hydrogenase for fermentative H2 production [1], but at the same time it determines strongly the overall ener...
Chapter
Knowledge of the kinetics of H2 production is a necessary step towards a thorough understanding of the mechanisms involved in the complex system of microorganisms’ metabolic pathways in the substrate, including H2-producing bacteria, electron shuttles and hydrogenase enzymes.
Chapter
In this chapter the valorization of the liquid end-products of H2 production under anaerobic digestion (AD) will be considered in order to increase the quantity of energy produced via methane dark fermentation, which is a well-established technology with several full-plant applications around the world.
Chapter
In the present chapter, the energy sustainability of anaerobic digestion (AD) technology is discussed. A procedure in three steps is described and then applied to AD. The suggested procedure can help in local planning, in allocation financial resources for the exploitation of new energy processes as well as in selecting the most sustainable choice...
Chapter
Microbial fuel cell (MFC) technology can be employed in order to add value to the metabolic products of acetogenesis fermentation after H2 production.
Article
Microbial fuel cell (MFC) is an upcoming technology that allows oxidizing organic matter to generate current by microorganism's activity. To render MFCs a cost-effective and energy sustainable technology, low-cost materials can be employed as support for bacteria growth and proliferation. With this purpose in mind, ceramic Berl saddles were opportu...
Article
Microbial fuel cells (MFCs) are energy sources, which generate electrical charge thanks to bacteria metabolism. We report on a full custom pressure wireless sensor node especially designed to operate with MFCs, comprising an ultra-low-power Impulse-Radio Ultra-Wide-Band Transmitter operating in the low 0–960 MHz band, a nanostructured piezoresistiv...
Article
The contents of this Chapter focus on the theoretical sustainable energy approach and its application to hydrogen and methane production, on the basis of results obtained from experimental tests on the Anaerobic Digestion (AD) technology. The evaluation of sustainability is pursued through the life cycle assessment (LCA), energy return on investmen...
Conference Paper
Microbial Fuel Cells (MFCs) are energy sources which generate electrical charge thanks to bacteria metabolism. Although functionally similar to chemical fuel cells (both including reactants and two electrodes, and anode and cathode), they have substantial ...
Article
Hydrogen production, via Dark Anaerobic Fermentation, leads to a negative net energy balance because of the difference between the energy produced as hydrogen and the direct ones (heat and electricity) consumed to produce it. The residual metabolites (Volatile Fatty Acids and alcohols) at the end of hydrogen production are oxidized compounds with a...
Article
Two energy conversion parameters that are able to evaluate and score the pre-treatments and biohydrogen conversion processes of organic waste refuses have been introduced and applied using original experimental data. The parameters can be considered a suitable tool to score and select processes using rich lignocelluloses materials. The first effici...
Article
Lignocelluloses are the main constituents of municipal organic waste (MOW). In order to increase the production of fuels, via fermentations, the enzymatic hydrolysis is the first step towards a valorisation process. It is well-known that the hydrolysis of lignocelluloses is not very effective because of the high stability of the constituents. In th...
Conference Paper
The only bio-H(2) production leads to a negative net energy balance, hence in this paper experimental tests in order to increase the energy recovery embedded in the substrate have been carried out. In order to try different strategies to recovery as much as possible the energy, we have realized several proofs of the concept tests on the following d...
Article
Full-text available
In the present contribution an analysis of the sustainability of Anaerobic Digestion (AD) technology is performed by applying the Energy Return On Investment (EROI) and the Energy Payback Time (EPT) approachs. The present paper contributes to the evaluation of renevable energy source sustainability. The evaluation of each energetic term is performe...
Article
A process aimed at producing energy needs to produce more energy than the energy necessary to run the process itself in order to be energetically sustainable. In this paper, an energy balance of a batch anaerobic bioreactor has been defined and calculated, both for different operative conditions and for different reactor scales, in order to analyze...
Article
The kinetic study was performed using a modified “initial rate-method” and the dynamic ones by the relaxation time methodology. The approach was tested on glucose as sole carbon source while the hydrogen forming bacteria HFB were obtained by acid treatment of anaerobic sludge. A large spectrum of substrate concentration from 5 g/l to 90 g/l was exp...
Article
The present study is aimed to test the effectiveness and the reproducibility of the acid pre-treatment of sewage sludge to suppress the methanogenic bacteria activity, in order to increase the hydrogen forming bacteria activity, mainly Clostridium species. The treated sludge has been tested on glucose reach medium under mesophilic conditions (35 de...

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Projects (2)
Project
This project aims at the valorization of end-of-use products or by-products. This includes the utilization of municipal solid waste incinerators fly ash, bottom ash, slag for different applications such as concrete, cement, clinker, and glass-ceramics. We also use "life cycle assessment" (LCA) as a tool to evaluate the sustainability of our approach.
Archived project
CELBICON is a H2020 Project (Project ID: 679050) funded under: H2020-EU.3.2. - SOCIETAL CHALLENGES work program, Call: H2020-ISIB-2015-2 “Converting CO2 into chemicals”, for the period from 2016-03-01 to 2019-08-31. web site: http://celbicon.org/ CELBICON aims at the development, from TRL3 to TRL5, of new CO2-to-chemicals technologies, conjugating at once small-scale for an effective decentralized market penetration, high efficiency/yield, low cost, robustness, moderate operating temperatures and low maintenance costs. In line with the reference Topic text, these technologies will bridge cost-effective CO2 capture and purification from the atmosphere through sorbents (with efficient heat integration of the CO2 desorption step with the subsequent process stages), with electrochemical conversion of CO2 (via PEM electrolysis concepts, promoting CO2 reduction at their cathode in combination with a fruitful oxidation carried out simultaneously at the anode), followed by bioreactors carrying out the fermentation of the CO2-reduction intermediates (syngas, C1 water-soluble molecules) to form valuable products (bioplastics like Poly-Hydroxy-Alkanoates - PHA -, isoprene, lactic acid, methane, etc.) as well as effective routes for their recovery from the process outlet streams. A distinctive feature of the CELBICON approach is the innovative interplay and advances of key technologies brought in by partners (high-tech SMEs & companies, research centres) to achieve unprecedented yield and efficiency results along the following two processing lines: i) High pressure process line tailored to the production of a PHA bioplastic and pressurized methane via intermediate electrochemical generation of pressurized syngas followed by specific fermentation steps; ii) Low pressure processing line focused on the production of value-added chemicals by fermentation of CO2-reduction water-soluble C1 intermediates. Over a 42 months project duration, the two process lines described will undergo a thorough component development R&D programme so as to be able to assemble three optimised TRL5 integrated test-rigs (one per TP) to prove the achievement of all the quantified techno-economical targets.