Search results for "ingegneria"

DENITRIFICAZIONE BIOLOGICA DELLE ACQUE DI FALDA MEDIANTE L’USO DI BARRIERE REATTIVE PERMEABILI

2012

Understanding the crowdfunding phenomenon and its implications for sustainability

2019

Abstract Nonetheless the large body of knowledge rapidly accumulated on crowdfunding as well as the growing relevance of this phenomenon for sustainability, there are very few studies on the role of crowdfunding for sustainability-oriented projects, and many related issues are still far from being fully understood. This signalises a clear need for unveiling the main dynamics of the relationship between crowdfunding and sustainability, and also opening up useful directions for future research on this relationship. To conceptualize the implications of crowdfunding for sustainability, we propose and use a framework, encompassing five dimensions, namely the project creator, the backers, the cam…

Bacterial Community Structure of an IFAS-MBRs Wastewater Treatment Plant

2017

TIn this work, the bacterial community putatively involved in BNR events of a UCT-MBMBR pilot plant was elucidated by both culture-dependent and metagenomics DNA analyses. The presence of bacterial isolates belonging to Bacillus (in the anoxic compartment) and to Acinetobacter, Stenotrophomonas, Rhodococcus, Escherichia and Aeromonas (in the aerobic compartment) is in agreement with the nitrification/denitrification processes observed in the plant. Moreover, the study of bacterial community structure by NGS revealed a microbial diversity suggesting a biochemical complexity which can be further explored and exploited to improve UCT-MBMBR plant performance.

Ottimizzazione di Forma della Deriva di una Barca a Vela: applicazione al caso della classe 5o5

2007

Con questo lavoro gli autori propongono un metodo di indagine automatizzato per la ricerca della forma ottimale di una deriva di uno scafo a vela che garantisca la portanza necessaria, nelle ordinarie condizioni di navigazione controvento, offrendo al contempo la minore resistenza. L’ampio spettro di forme adottate denuncia forse il problema dei progettisti, i quali si rifanno alla teoria classica dell’aerodinamica, nell’interpretare il complesso problema idrodinamico. Da questo punto di vista un valido aiuto viene offerto dai codici di fluidodinamica computazionale (CFD) i quali permettono, con buona approssimazione, di individuare la distribuzione delle forze e delle velocità di un flusso…

Best practice strategies in business process redesign: an experimental study

2012

This paper presents investigates the determinants for best practices’ adoption in business process redesign. Specifically, we evaluate the role of the best practices in business process redesign by exploring their adoption dependences from the process typology and the goals of the redesign project. In order to answer to our research questions, we conducted an experimental study over 18 business process redesign projects carried out by 18 teams of students. The experimental study shows that there exists a business practice strategic orientation in redesigning a process, i.e. evident correlations exist among the adoption of specific practices with the adoption of other specific practices, but…

Strategic drivers influencing the governance of inter-firm relationships between biotechnology and pharmaceutical companies: an empirical survey

2010

This paper investigates the drivers influencing the choice of the governance form in inter-firm relationships (IFRs) between pharmaceutical and biotech companies. By analyzing the relevant literature on the issue, we have located the main drivers that might influence such relationship and a set of hypotheses linking them to governance forms. Such theoretical framework has been empirically tested through a survey conducted among the companies associated to Farmindustria. The result of the empirical analysis provides some interesting insights on how shaping bio-pharmaceutical deals; we found that the developmental stage of the product object of the deal, the existence of previous collaboratio…

Assessing the Feasibility of Wastewater Finishing Treatment by Modified Sand Filters.

2014

The purpose of this study was to investigate the performance of the modified biosand filtration at lab scale. The traditional biosand filter arrangement was modified adding a 2nd stage to the traditional single one. Pre-clarified wastewater first flows down through different filtration material layers; then flows upward in the second stage through other three - and finer - filtration layers including small gravel at the bottom, fine sand and small gravel again. During the experiment timespan (90 days) daily results were collected, analysed and tabled at the laboratories of the Publicly Owned Wastewater Treatment Station – Palermo, operated by AMAP. The analysis included bacteriological para…

A hydrodynamic water quality model for propagation of pollutants in rivers.

2010

Numerical modelling can be a useful tool to assess a receiving water body's quality state. Indeed, the use of mathematical models in river water quality management has become a common practice to show the cause-effect relationship between emissions and water body quality and to design as well as assess the effectiveness of mitigation measures. In the present study, a hydrodynamic river water quality model is presented. The model consists of a quantity and a quality sub-model. The quantity sub-model is based on the Saint Venant equations. The solution of the Saint Venant equations is obtained by means of an explicit scheme based on space-time conservation. The method considers the unificatio…

Polylactic is a Sustainable, Low Absorption, Low Autofluorescence Alternative to Other Plastics for Microfluidic and Organ-on-Chip Applications

2020

Organ-on-chip (OOC) devices are miniaturized devices replacing animal models in drug discovery and toxicology studies. The majority of OOC devices are made from polydimethylsiloxane (PDMS), an elastomer widely used in microfluidic prototyping, but posing a number of challenges to experimentalists, including leaching of uncured oligomers and uncontrolled absorption of small compounds. Here we assess the suitability of polylactic acid (PLA) as a replacement material to PDMS for microfluidic cell culture and OOC applications. We changed the wettability of PLA substrates and demonstrated the functionalization method to be stable over a time period of at least 9 months. We successfully cultured …

Optimization of acetate production from citrus wastewater fermentation

2021

Abstract Citrus wastewater is a sugar-rich waste stream suitable for the recovery of energy of material from its treatment. In this study, fermentation of citrus wastewater was carried out to assess the optimal conditions to maximize the bioconversion of the organic substrate into acetate. Unbalanced nutrient (C: N: P 200:0.1:0.1) enabled the highest acetate production. The presence of the particulate organic fraction enabled to obtain a higher acetate concentration regardless the initial COD concentration. Initial pH values higher than 5 did not cause substantial differences on the maximum bioconversion of COD into acetate in Trial 3, whereas pH lower than 5 hindered the hydrolysis process…