5,571 research outputs found
Optimization of Semy-Dry anaerobic digestion for a wider diffusion of the Food Waste treatment for energy recovery. Technical and Economic evaluation
No full textCurrently, large plants are the most favoured approach for the anaerobic treatment of the organic fraction of municipal solid waste (OFMSW). However, centralised solutions imply certain limitations which prevent large-scale implementation of the anaerobic digestion (AD) of food waste for energy recovery. As a result, we are digesting less than 5% of organic waste both in Europe and the USA even today. Pursuing the criteria for maximising the balance between profit and impacts, an innovative layout with the ultimate goal of promoting the use of small, easy-to-operate AD plants is proposed. The purpose of the research is to investigate the better way to apply the Semi-Dry approach to the OFMST treatment, with fermenters that can manage to treat the biowaste as it is (feeding with TS>20-25%), with no dilution or any co-substrate addition needed. A source-separated OFMSW (SS-OFMSW) was treated in a mesophilic plug flow reactor by applying an atypical combination of conditions such as high SS-OFMSW solid content (214.5 g·kg-1), high organic loading rate (6.2 kg VS·m-3·d-1), and no dilution or co-substrate addition. A suitable and an efficient mixing system is essential to control the process. Accordingly, the process was stable in a single-stage reactor, in the absence of digestate recirculation, obtaining specific gas production of 0.67 m3·kg-1 VS in terms of biogas and 0.41 m3·kg-1 VS in terms of methane. High reactor volume exploitation and small plant construction were feasible, reaching a gas production rate of 4.5 m3·m-3 d-1. Costs in terms of capital and operating expenditure are estimated, and an economic evaluation is carried on to study the economic sustainability of full-scale installation at different plant sizes
Biohydrogen production from food waste in batch and semi-continuous conditions: evaluation of a two-phase approach with digestate recirculation for pH control
No full textThe research investigated the production of Biohythane in a two-phase anaerobic digestion process treating food waste as substrate. Preliminary batch assays were carried out at initial organic loadings of 15, 20, 25 and 30 kg TVS m?3, in stirred 1.5-l reactors at 55 °C. The results showed all hydrogen was produced within the first 24 h after feeding and the highest load tested gave the maximum hydrogen production (0.047 m3 H2 kg?1VS, H2 30%). Similar loadings were then tested in a two-phase system. Hydraulic retention times of 3 and 12 days were applied to the first and second reactor respectively. In order to keep the pH at ?5.5, either supernatant or whole digestate from the methanogenic reactor was recirculated to the first phase. Results showed that hydrogen was produced (0.117 Nm3 kg?1 VS, 47.7%) when recirculating whole digestate with an organic loading rate of 20 kg TVS m?3 day?1
Geomorphological Survey and Remote Sensing analysis: a multidisciplinary approach to reconstruct triggering factors of a DSGSD in Maso Corto (South Tyrol, Italy)
No full textCorrection to: Case report: Acute clinical presentation and neonatal management of primary hyperparathyroidism due to a novel CaSR mutation (BMC Pediatrics (2018) 18 (340) DOI: 10.1186/s12887-018-1319-0)
No full textIn the published article [1], an error has been noticed in the author group section
Highlights from the ALICE collaboration
No full textSignificant advances in heavy-ion physics have come about as almost ten years have passed since the beginning of the heavy-ion programme at the LHC. In thisdocument, we review some key results from the ALICE collaboration on a variety of topics, from properties of the quark-gluon plasma (QGP) to basic QCD, and discuss how theseset the stage for further measurements in the next decade
Charm and multi-charm baryon measurements via strangeness tracking with the upgraded ALICE detector
No full textWe present a new method for detection of multiply charmed baryons via their decays into strange baryons, using ‘strangeness tracking’. This method makes use of the state-of-the-art upgraded silicon detectors in ALICE during Runs 3, 4 and beyond will enable the novel possibility of tracking strange hadrons directly before they decay, leading to a very significant improvement in impactparameter resolution. In this work, we will discuss how this new technique will be crucial to distinguish secondary strange baryons originating from charm decays from primary strange baryons. This is a particularly interesting possibility for the Ω− baryon coming from Ωc0 → Ω−π+ decays, since there is no other relevant feeddown source for Ω−. This, in turn, means that the main Ω− background for the Ωc measurement will point most accurately to the primary vertex, unlike pions or protons from other charm baryon decays.We will illustrate the achievable performance of strangeness tracking for the Run 3 configuration of ALICE with the upgraded Inner Tracking System, which is fully instrumented with silicon pixel detectors. Moreover, we will discuss the potential of this technique in a future experiment with an extensive silicon tracking detector with a first layer very close to the interaction point. Finally, we will also cover other potential major applications of strangeness tracking, including measurements of hypernuclei such as the Λ3H.We present a new method for detection of multiply charmed baryons via their decays into strange baryons, using `strangeness tracking'. This method makes use of the state-of-the-art upgraded silicon detectors in ALICE during Runs 3, 4 and beyond will enable the novel possibility of tracking strange hadrons directly before they decay, leading to a very significant improvement in impact-parameter resolution. In this work, we will discuss how this new technique will be crucial to distinguish secondary strange baryons originating from charm decays from primary strange baryons. This is a particularly interesting possibility for the baryon coming from decays, since there is no other relevant feeddown source for . This, in turn, means that the main background for the measurement will point most accurately to the primary vertex, unlike pions or protons from other charm baryon decays. We will illustrate the achievable performance of strangeness tracking for the Run 3 configuration of ALICE with the upgraded Inner Tracking System, which is fully instrumented with silicon pixel detectors. Moreover, we will discuss the potential of this technique in a future experiment with an extensive silicon tracking detector with a first layer very close to the interaction point. Finally, we will also cover other potential major applications of strangeness tracking, including measurements of hypernuclei such as the
L'adulterio come strumento sociale: confronto tra Anna Karenina e Lady Chatterley
No full textLo scopo di questo lavoro è confrontare due opere, Anna Karenina di Lev Tolstoj e L’amante di Lady Chatterley di David Herbert Lawrence e dimostrare che essi non hanno in comune solo il tema dell’adulterio, ma anche e soprattutto l’averlo inteso come strumento di ribellione sociale. In Tolstoj troviamo l’adulterio censurato nel corso della narrazione, poiché esso viene condannato sia dalla società che dall’autore stesso, che aveva come intento dare una lezione morale. Lawrence invece esalta e descrive l’adulterio, poiché nel suo caso diventa lo strumento di scoperta dell’amore vero e di ritorno al primitivismo a dispetto della civiltà industrializzata. Quindi, pur appartenendo a due epoche diverse e a due società con differenti visioni circa matrimonio e famiglia, le due eroine sono similari per il coraggio che dimostrano nell’andare contro le rispettive società
Interazione e fisiologia della superficie oculare all’uso di lenti a contatto sclerali
No full textPurpose: To identify in which way scleral lenses interact with the physiology of the ocular surface. The research fits the current thirst for further knowledges about the balancing between benefit and danger in normal corneas.
Method: Comparison between studies, articles, and scripts by several practitioners trying to find out a common opinion which was the most updated one available.
Conclusions: The research found out the evolutions of the applying philosophy of scleral lenses and the exponential increase of interest in this technology. Shared advise by almost every author is the need for further objectivity and knowledge upon this topic, in particular about the oxygen transmission and its consequences on long term wear to the cornea.ope
ALICE event displays and geometry rendering of lead-lead ion collisions during Run 3
No full textEvent displays of the first Pb-Pb collision of Run3 taken at ALICE which sees its first event displays of heavy ion - lead-lead (Pb-Pb) - collisions during Run 3. Lead beams travelled for 3 days (17-19 November) in the LHC accelerator. ALICE is one of the main experiments on the LHC who profits mostly from the results of the lead-lead ion beam optimized to study the collisions of nuclei. The aim is to study the physics of strongly interacting matter at the highest energy densities reached so far in the laboratory
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