Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Supplementary data to this article can be found online at https://doi.org/10.1016/j.cej.2021.129348.Biofouling is the unwanted accumulation of deposits on surfaces, composed by organic and inorganic particles and (micro)organisms. Its occurrence in industrial equipment is responsible for several drawbacks related to operation and maintenance costs, reduction of process safety and product quality, and putative outbreaks of pathogens. The understanding on the role of operating conditions in biofouling development highlights the hydrodynamic conditions as key parameter. In general, (bio)fouling occurs in a higher extension when laminar flow conditions are used. However, the characteristics and resilience of biofouling are highly dependent on the hydrodynamic conditions under which it is developed, with turbulent conditions being associated to recalcitrant biodeposits. In industrial settings like heat exchangers, fluid distribution networks and stirred tanks, hydrodynamics play a dual function, affecting the process effectiveness while favouring biofouling formation. This review summarizes the hydrodynamics played in conventional industrial settings and provides an overview on the relevance of hydrodynamic conditions in biofouling development as well as in the effectiveness of industrial processes.This work was financially supported by: Base Funding - UIDB/00511/2020 of LEPABE and UIDB/00081/2020 of CIQUP funded by national funds through the FCT/MCTES (PIDDAC); Project Bio cide_for_Biofilm - PTDC/BII-BTI/30219/2017 - POCI-01-0145-FEDER 030219, ABFISH – PTDC/ASP-PES/28397/2017 - POCI-01-0145- FEDER-028397 and ALGAVALOR - POCI-01-0247-FEDER-035234, fun ded by FEDER funds through COMPETE2020 – Programa Operacional Competitividade e Internacionalizaçao ˜ (POCI) and by national funds (PIDDAC) through FCT/MCTES; Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit and BioTecNorte operation (NORTE-01-0145-FEDER 000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte; FCT/ SFRH/BD/147276/2019 (Susana Fernandes) and SFRH/BSAB/150379/2019 (Manuel Simoes).info:eu-repo/semantics/publishedVersio

Project management practices for collaborative university-industry R&D: a hybrid approach

This paper aims to help stakeholders involved in collaborative university-industry R&D initiatives by presenting a hybrid project management (PM) approach, with a set of key distinct PM practices for this particular context. Collaborative university-industry R&D initiatives are usually organized as programs with a set of related projects associated. Therefore, a hybrid PM approach was developed based on a case study research strategy. During the large case study analysis two research methods were applied: participant observation and document analysis. The hybrid management approach was developed based on the contingency theory, which identifies a set of 24 Must Have PM practices, and that are transversal to all projects in the program as the program governance must have to be assured. Additionally, it identifies three different sets of Nice to Have PM practices, which are optional and are dependent on the particular project context and PM approach adopted by each project team: waterfall or agile. Overall 32 Nice to Have PM practices were identified, being 15 of them agile, 3 waterfall and the 14 remaining transversal to both agile and waterfall approaches.This research is sponsored by the Portugal Incentive System for Research and Technological Development. Project in co-promotion nº 002814/2015 (iFACTORY 2015-2018) and by the FCT (SFRH/BPD/111033/2015)

Assessment of layer thickness and uniformity in railway embankments with Ground Penetrating Radar

In the aim of a national research project entitled “Interaction soil-rail track for high speed trains”, a protocol was established between the National Railway Network and four national research institutions to develop the knowledge concerning the methodology for the construction and quality control of the railway embankments and railtrack layers for high speed trains. One of the objectives of this protocol is to establish a methodology for quality control of construction layers by different available test methods. Nondestructive testing (NDT) methods are currently very attractive due to their ability to provide information about layer thickness and state condition without causing damage or requiring the removal of material samples. Within the NDT available, ground penetrating radar (GPR) is a very fast and reliable technique, whose advantage is the repeatability and the capability of acquiring continuous data. To reach the proposed goal, a trial embankment was constructed with different materials, layer’s thicknesses, water contents and compaction energy levels. GPR was used in two embankments, in order to detect the thickness of the sub-ballast layer located over the compacted sand layer and its uniformity along the track, but also along the cross-section of the track. In order to control some parameters of the sub-ballast layer, like thickness and uniformity, several metallic plates had been used in the base of the sub-ballast layer, along an alignment. It shows clearly the ability of GPR to detect the sub-ballast layer and its thickness variations along the profile

An extension of the improving and embedding project management practice framework: Case study analysis

Purpose: The purpose of this paper is to develop and test an extension of a previously conceived framework for improving and embedding project management (PM) practice in organisations. The framework identifies the most useful project management improvement initiatives (PMIIs) and the key factors for embedding PM practice. However, professionals need guidance on how to operationalise such framework in their organisations, therefore a method for applying the framework is developed. Design/methodology/approach: The method being proposed for applying the framework is demonstrated and tested with a large University–Industry consortium case study. During the case study analysis three research methods were applied: participant observation, document analysis and focus groups. Findings: In what concerns both the PMIIs and key embedding factors in the framework, the proposed method comprises their acknowledgement, scoring, relevance analysis, selection and planning. The detailed report on how the framework was applied in the particular case study also sheds light on how University–Industry consortiums can make use of PM to become more successful. Research limitations/implications: The research was performed using only one case study which limits the generalisability of its findings. Practical implications: Detailed guidance is provided for applying the framework’s both constructs, “improving” and “embedding”, through a set of clear steps. Originality/value: The paper shows the explanatory power of the framework for improving and embedding PM practice in a case study, demonstrating that the method for its application is practical and suitable.FCT - Fundació Catalana de Trasplantament(SFRH/BPD/111033/2015

Planning benefits realization in a collaborative university-industry R&D funded program

This paper presents a benefits management (BM) approach adopted during the planning of a collaborative university-industry R&D funded program, named IC-HMI Program, in order to pursue benefits realization. The BM approach embraced four main phases: 'Identify expected benefits' 'Plan benefits realization' 'Pursue benefits realization' and 'Transfer and ensure benefits realization' each one comprising key activities that should be performed with a clear set of outputs to be generated. Particular focus is given to the benefits identification, and to the development of a Benefit Breakdown Structure (BBS), assuming the key role of such a formatting technique to target project benefits. It is the first and critical step in the BM process. Based on a review of literature, and the three research methods adopted during the IC-HMI case study analysis: a set of 33 benefits were identified, which can be used by professionals and academics as a checklist for benefits identification of their own initiatives. Additionally, the BBS implemented in IC-HMI program to qualify and better understand each benefit and its intrinsic properties, can be used to facilitate planning and benefits realization.FCT - Fundació Catalana de Trasplantament(SFRH/BPD/111033/2015

The effects of chemical and mechanical stresses on Bacillus cereus and Pseudomonas fluorescens single- and dual-species biofilm removal

Biofilm control is mainly based on chemical disinfection, without a clear understanding of the role of the biocides and process conditions on biofilm removal. This study aims to understand the effects of a biocide (benzyldimethyldodecyl ammonium chlorideBDMDAC) and mechanical treatment (an increase of shear stress -w) on single- and dual-species biofilms formed by Bacillus cereus and Pseudomonas fluorescens on high-density polyethene (HDPE). BDMDAC effects were initially assessed on bacterial physicochemical properties and initial adhesion ability. Then, mature biofilms were formed on a rotating cylinder reactor (RCR) for 7 days to assess the effects of chemical and mechanical treatments, and the combination of both on biofilm removal. The results demonstrated that the initial adhesion does not predict the formation of mature biofilms. It was observed that the dual-species biofilms were the most susceptible to BDMDAC exposure. The exposure to increasing w emphasised the mechanical stability of biofilms, as lower values of w (1.66 Pa) caused high biofilm erosion and higher w values (17.7 Pa) seem to compress the remaining biofilm. In general, the combination of BDMDAC and the mechanical treatment was synergic in increasing biofilm removal. However, these were insufficient to cause total biofilm removal (100%; an average standard deviation of 11% for the method accuracy should be considered) from HDPE.This work was financially supported by: Base Funding—UIDB/00511/2020 of LEP-ABE funded by national funds through the FCT/MCTES (PIDDAC); Project Biocide_for_Biofilm—TDC/BII-BTI/30219/2017—POCI-01-0145-FEDER-030219; Germirrad—POCI-01-0247-FEDER-072237; pBio4.0—POCI-01-0247-FEDER-033298, funded by FEDER funds through COMPETE2020—Programa Operacional Competitividade e Internacionalização (POCI) and by national funds (PIDDAC) through FCT/MCTES. This study was further supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit and BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020—Programa Operacional Regional do Norte.info:eu-repo/semantics/publishedVersio

Wood-plastic composite based on post-consumer HDPE and vermiculite / Compósito madeira-plástico à base de HDPE pós-consumo e vermiculita

In this work, wood plastic-composites (WPCs) were prepared by the incorporation of vermiculite in the post-consumer HDPE. The processing of WPCs with different clay contents (2, 5 and 10% by weight) was carried out in a mono-extruder. The specimens were obtained by compression and characterized by density (ASTM D792), hardness (ASTM D2240) and melt flow index (MFI, ASTM D1238). The composites obtained showed a tendency of increased density and reduced MFI from 5% clay. However, no significant difference in WPC hardness was observed in relation to the matrix. 

Unravelling the effect of SrTiO3 antiferrodistortive phase transition on the magnetic properties of La0.7Sr0.3MnO3 thin films

Epitaxial La0.7Sr0.3MnO3 (LSMO) thin films, with different thicknesses ranging from 20 to 330 nm, were deposited on (1 0 0)-oriented strontium titanate (STO) substrates by pulsed laser deposition, with their structure and morphology characterized at room temperature. The magnetic and electric transport properties of the as-processed thin films reveal an abnormal behaviour in the temperature dependent magnetization M(T) below the antiferrodistortive STO phase transition (TSTO), and also an anomaly in the magnetoresistance and electrical resistivity close to the same temperature. Films with thickness ≤100 nm show an in-excess magnetization and pronounced changes in the coercivity due to the interface-mediated magnetoelastic coupling with antiferrodistortive domain wall movement occurring below TSTO. However, in thicker LSMO thin films, an in-defect magnetization is observed. This reversed behaviour can be understood with the emergence in the upper layer of the film, of a columnar structure needed to relax the elastic energy stored in the film, which leads to randomly oriented magnetic domain reconstructions. For enough high-applied magnetic fields, as thermodynamic equilibrium is reached, a full suppression of the anomalous magnetization occurs, wherein the temperature dependence of the magnetization starts to follow the expected Brillouin behaviour.This work was supported by the Fundação para a Ciencia e Tecnologia and COMPETE/QREN/EU, through the project PTDC/CTM/099415/2008. The authors are very grateful to Maria Joao Pereira and Maria Rosario Soares from CICECO, University of Aveiro, for the HR-XRD measurements and discussion of the results. F Figueiras acknowledges FCT grant SFRH/BPD/80663/2011. The authors also acknowledge Projeto Norte-070124-FEDER-000070 and Professor J Fontcuberta for their fruitful discussions

Applying a method for measuring the performance of university-industry R&D collaborations: case study analysis

Collaborations between university and industry are possibly the most important strategic instrument used to increase the efficiency and effectiveness of industrial investments in Research and Development (R&D), and have been increasing, which assigns even more importance to the need for measuring their performance. Therefore, a method to measure university-industry R&D collaborations, named MPUIC, developed based on Design Science Research methodology (DSRM), was applied and validated through a case study. This paper firstly describes some improvements made to the previously developed MPUIC method before its application to a large program between the University of Minho and Bosch Car Multimedia (Portugal). The MPUIC method adopted a weighted scoring approach, and is composed by 31 performance indicators, distributed through the program management life cycle. Secondly, the performance measurement of the case study program is conducted, resulting in a score of 4.4 in a scale of 1 to 5, where 5 indicates "very high" performance. Finally, a questionnaire was administered to evaluate the developed method and, from the 31 performance indicators that compose the method, 29 were evaluated as having a level of relevance above 3 in a scale of 1 to 5 and, from these, 19 were evaluated as having a level of relevance equal to or above 4.This research is sponsored by the Fundação para a Ciência e a Tecnologia FCT (SFRH/BPD/111033/2015), and by the Portugal Incentive System for Research and Technological Development. Project in co-promotion nº 039479/2018 (FoF 2018-2021