Process Economics: Evaluation of the Potential of ATPS as a Feasible Alternative to Traditional Fractionation Techniques

2017 ◽  
pp. 161-178 ◽  
Author(s):  
Mario A. Torres-Acosta ◽  
Federico Ruiz-Ruiz ◽  
Jorge Benavides ◽  
Marco Rito-Palomares
Keyword(s):  
Process Economics ◽  
Feasible Alternative

Successes and Challenges Implementing a “Fresh from the Farm” Fundraising Program in Schools

2020 ◽  
pp. 1-4
Author(s):  
Jennifer Buccino ◽  
Leslie Whittington-Carter
Keyword(s):  
Local Food ◽  
Fresh Produce ◽  
Ministry Of Education ◽  
Fruit And Vegetable ◽  
School Food ◽  
Financial Model ◽  
High Satisfaction ◽  
Food And Beverage ◽  
Feasible Alternative ◽  
Successes And Challenges

In 2013, 4 partner organizations: Dietitians of Canada (DC); Ontario Fruit and Vegetable Growers Association; Ontario Ministry of Agriculture, Food and Rural Affairs; and Ontario Ministry of Education created “Fresh from the Farm” (FFF), a healthy fundraiser for Ontario Schools. FFF was designed to support the Ontario government’s School Food and Beverage Policy and Local Food Act and to provide a feasible alternative for less healthy fundraising options. This paper outlines the program successes and challenges over the 6 years of DC’s involvement. After 6 years, over 1700 schools successfully participated in FFF and over $2 million has been paid to Ontario farmers for product and distribution. The average participating school has generated $2040 in sales towards their fundraising efforts, equating to 770 kg (1700 lbs) of fresh produce per school. Schools reported high satisfaction with FFF, with over 90% of participating schools enrolling in subsequent years. The main reasons for satisfaction included: easy to implement, profitable, offers a healthy alternative to “traditional” fundraising programs, and provides great value for cost. The main challenges were logistics of sourcing and delivery, higher than anticipated costs that made the financial model less feasible than predicted, and competition from other fundraisers.

scholarly journals Parasitism level by helminths and weight gain of calves kept in organic and conventional grazing

2013 ◽  
Vol 33 (5) ◽  
pp. 586-590 ◽  
Author(s):  
Jenevaldo Barbosa da Silva ◽  
Gisele Maria Fagundes ◽  
João Paulo Guimarães Soares ◽  
Adivaldo Henrique da Fonseca
Keyword(s):  
Weight Gain ◽  
Future Generations ◽  
Nematode Control ◽  
Successful Development ◽  
Organic Systems ◽  
Fecal Egg Count ◽  
Domestic Ruminants ◽  
Significant Difference ◽  
Feasible Alternative ◽  
Parasitism Level

Sustainable production is a principle in which we must meet the needs of the present without compromising the capacity of future generations. Despite the successful development of pesticides against endo and ectoparasites found in domestic ruminants, these parasites are still the major problem of the herbivore production system. The purpose of this study was to know the population of gastrintestinal parasites and their influence on weight gain of calves kept in organic and conventional grazing. Thus, organic and conventional calves were randomly selected in 2008 and 2009. The fecal egg count (FEC) indentified the following genders of helminths: Haemonchus, Trichostrongylus, Oesophagostomum, Cooperia, Strongyloides, Trichuris and oocysts of Eimeria. There was no significant difference (p>0.05) between FEC in organic and conventional animals. Calves younger than 6 months showed significant higher infection (p<0.05) than calves between 7 and 12 months of age. The weight gain observed during the study was of 327g/day and 280g/day for conventional and organic systems animals, respectively. Consequently, the combination of sustainable practices of grazing associated with the selective application of anthelmintics may be a feasible alternative for nematode control in a conventional system and in transition to an organic one.

scholarly journals Enhancing Qualities of Consciousness during Online Learning via Multisensory Interactions

2021 ◽  
Vol 11 (5) ◽  
pp. 57
Author(s):  
Valentina Cesari ◽  
Benedetta Galgani ◽  
Angelo Gemignani ◽  
Danilo Menicucci
Keyword(s):  
Online Learning ◽  
Virtual Environments ◽  
Information Technologies ◽  
Physical Distance ◽  
Traditional Learning ◽  
Sense Of Presence ◽  
Lack Of Control ◽  
Multisensory Interactions ◽  
Feasible Alternative

Online-learning is a feasible alternative to in-person attendance during COVID-19 pandemic. In this period, information technologies have allowed sharing experiences, but have also highlighted some limitations compared to traditional learning. Learning is strongly supported by some qualities of consciousness such as flow (intended as the optimal state of absorption and engagement activity) and sense of presence (feeling of exerting control, interacting with and getting immersed into real/virtual environments), behavioral, emotional, and cognitive engagement, together with the need for social interaction. During online learning, feelings of disconnection, social isolation, distractions, boredom, and lack of control exert a detrimental effect on the ability to reach the state of flow, the feeling of presence, the feeling of social involvement. Since online environments could prevent the rising of these learning–supporting variables, this article aims at describing the role of flow, presence, engagement, and social interactions during online sessions and at characterizing multisensory stimulations as a driver to cope with these issues. We argue that the use of augmented, mixed, or virtual reality can support the above-mentioned domains, and thus counteract the detrimental effects of physical distance. Such support could be further increased by enhancing multisensory stimulation modalities within augmented and virtual environments.

scholarly journals How I do it: parietal trans-sulcal para-fascicular approach to lateral thalamic/internal capsule cavernous malformation

2021 ◽  
Author(s):  
Michael Amoo ◽  
Kieron J. Sweeney ◽  
Ronan Kilbride ◽  
Mohsen Javadpour
Keyword(s):  
White Matter ◽  
Cavernous Malformation ◽  
Internal Capsule ◽  
Complete Resection ◽  
Brain Lesions ◽  
Tubular Retractor ◽  
Surgical Technology ◽  
Feasible Alternative ◽  
Traditional Approaches ◽  
Deep Brain

Abstract Background The surgical management of deep brain lesions is challenging, with significant morbidity. Advances in surgical technology have presented the opportunity to tackle these lesions. Methods We performed a complete resection of a thalamic/internal capsule CM using a tubular retractor system via a parietal trans-sulcal para-fascicular (PTPF) approach without collateral injury to the nearby white matter tracts. Conclusion PTPF approach to lateral thalamic/internal capsule lesions can be safely performed without injury to eloquent white matter fibres. The paucity of major vessels along this trajectory and the preservation of lateral ventricle integrity make this approach a feasible alternative to traditional approaches.

scholarly journals Comparable outcome for autografts and allografts in primary medial patellofemoral ligament reconstruction for patellofemoral instability: systematic review and meta-analysis

2021 ◽  
Author(s):  
Filippo Migliorini ◽  
Andromahi Trivellas ◽  
Jörg Eschweiler ◽  
Matthias Knobe ◽  
Markus Tingart ◽  
...  
Keyword(s):  
Medial Patellofemoral Ligament ◽  
Meta Analysis ◽  
Patellofemoral Instability ◽  
Mpfl Reconstruction ◽  
Current Evidence ◽  
Level Of Evidence ◽  
Feasible Alternative ◽  
The Mean ◽  
Persistent Instability

Abstract Purpose This study updates the current evidence on the role of allografts versus autografts for medial patellofemoral ligament (MPFL) reconstruction in patients with patellofemoral instability. Methods The study was performed according to the PRISMA guidelines. In March 2021, a literature search in the main online databases was performed. Studies reporting quantitative data concerning primary MPFL reconstruction using an allograft were considered for inclusion. The Coleman Methodology Score was used to assess the methodological quality of the selected articles. Results Data from 12 studies (474 procedures) were retrieved. The mean follow-up was 42.2 (15–78.5) months. The mean age was 21.1 ± 6.2 years. 64.9% (285 of 439) of patients were female. At the last follow-up, the Tegner (p < 0.0001), Kujala (p = 0.002) and the Lysholm (p < 0.0001) scores were minimally greater in the autografts. The similarity was found in the rate of persistent instability sensation and revision. The allograft group evidenced a lower rate of re-dislocations (p = 0.003). Conclusion Allografts may represent a feasible alternative to traditional autograft for MPFL reconstruction in selected patients with patellofemoral instability. Allograft tendons yielded similar PROMs, rates of persistent instability, and revision. Allograft reconstructions tended to have modestly lower re-dislocation rates. Level of evidence IV.

scholarly journals In situ measurements of oxidation–reduction potential and hydrogen peroxide concentration as tools for revealing LPMO inactivation during enzymatic saccharification of cellulose

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Adnan Kadić ◽  
Anikó Várnai ◽  
Vincent G. H. Eijsink ◽  
Svein Jarle Horn ◽  
Gunnar Lidén
Keyword(s):  
Reduction Potential ◽  
Enzymatic Saccharification ◽  
The State ◽  
Enzyme Inactivation ◽  
Ex Situ ◽  
Process Economics ◽  
Complete Inactivation ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

Abstract Background Biochemical conversion of lignocellulosic biomass to simple sugars at commercial scale is hampered by the high cost of saccharifying enzymes. Lytic polysaccharide monooxygenases (LPMOs) may hold the key to overcome economic barriers. Recent studies have shown that controlled activation of LPMOs by a continuous H2O2 supply can boost saccharification yields, while overdosing H2O2 may lead to enzyme inactivation and reduce overall sugar yields. While following LPMO action by ex situ analysis of LPMO products confirms enzyme inactivation, currently no preventive measures are available to intervene before complete inactivation. Results Here, we carried out enzymatic saccharification of the model cellulose Avicel with an LPMO-containing enzyme preparation (Cellic CTec3) and H2O2 feed at 1 L bioreactor scale and followed the oxidation–reduction potential and H2O2 concentration in situ with corresponding electrode probes. The rate of oxidation of the reductant as well as the estimation of the amount of H2O2 consumed by LPMOs indicate that, in addition to oxidative depolymerization of cellulose, LPMOs consume H2O2 in a futile non-catalytic cycle, and that inactivation of LPMOs happens gradually and starts long before the accumulation of LPMO-generated oxidative products comes to a halt. Conclusion Our results indicate that, in this model system, the collapse of the LPMO-catalyzed reaction may be predicted by the rate of oxidation of the reductant, the accumulation of H2O2 in the reactor or, indirectly, by a clear increase in the oxidation–reduction potential. Being able to monitor the state of the LPMO activity in situ may help maximizing the benefit of LPMO action during saccharification. Overcoming enzyme inactivation could allow improving overall saccharification yields beyond the state of the art while lowering LPMO and, potentially, cellulase loads, both of which would have beneficial consequences on process economics.

scholarly journals Identification of the major fermentation inhibitors of recombinant 2G yeasts in diverse lignocellulose hydrolysates

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Gert Vanmarcke ◽  
Mekonnen M. Demeke ◽  
Maria R. Foulquié-Moreno ◽  
Johan M. Thevelein
Keyword(s):  
Second Generation ◽  
Industrial Process ◽  
Superior Performance ◽  
Fermentation Inhibitors ◽  
Inhibitor Tolerance ◽  
Xylose Consumption ◽  
Process Economics ◽  
Partial Inhibition ◽  
Second Generation Bioethanol ◽  
Lignocellulose Hydrolysates

Abstract Background Presence of inhibitory chemicals in lignocellulose hydrolysates is a major hurdle for production of second-generation bioethanol. Especially cheaper pre-treatment methods that ensure an economical viable production process generate high levels of these inhibitory chemicals. The effect of several of these inhibitors has been extensively studied with non-xylose-fermenting laboratory strains, in synthetic media, and usually as single inhibitors, or with inhibitor concentrations much higher than those found in lignocellulose hydrolysates. However, the relevance of individual inhibitors in inhibitor-rich lignocellulose hydrolysates has remained unclear. Results The relative importance for inhibition of ethanol fermentation by two industrial second-generation yeast strains in five lignocellulose hydrolysates, from bagasse, corn cobs and spruce, has now been investigated by spiking higher concentrations of each compound in a concentration range relevant for industrial hydrolysates. The strongest inhibition was observed with industrially relevant concentrations of furfural causing partial inhibition of both D-glucose and D-xylose consumption. Addition of 3 or 6 g/L furfural strongly reduced the ethanol titer obtained with strain MD4 in all hydrolysates evaluated, in a range of 34 to 51% and of 77 to 86%, respectively. This was followed by 5-hydroxymethylfurfural, acetic acid and formic acid, for which in general, industrially relevant concentrations caused partial inhibition of D-xylose fermentation. On the other hand, spiking with levulinic acid, 4-hydroxybenzaldehyde, 4-hydroxybenzoic acid or vanillin caused little inhibition compared to unspiked hydrolysate. The further evolved MD4 strain generally showed superior performance compared to the previously developed strain GSE16-T18. Conclusion The results highlight the importance of individual inhibitor evaluation in a medium containing a genuine mix of inhibitors as well as the ethanol that is produced by the fermentation. They also highlight the potential of increasing yeast inhibitor tolerance for improving industrial process economics.

scholarly journals RESEARCH INTO THE METHODS OF ANALYSING THE PRODUCTIVITY INDICATORS OF TRANSPORT TERMINALS

Transport ◽  
2009 ◽  
Vol 24 (3) ◽  
pp. 192-199 ◽  
Author(s):  
Ilona Jaržemskienė
Keyword(s):  
Comparative Analysis ◽  
Functional Dependence ◽  
Data Envelopment ◽  
Analysis Method ◽  
Accurate Evaluation ◽  
Feasible Alternative ◽  
Productivity Indicators ◽  
Insight Into ◽  
Regressive Analysis

The measurement of terminal productivity is the issue of extreme importance to both terminal owners and management and customers. As the sector of transport is highly intensive in terms of investments into the infrastructure, the productivity of a terminal may play a crucial role in competing with other terminals. Productivity is defined in terms of inputs and output. The majority of the available studies, wherein this issue is addressed, are generally focused on the determination of functional dependence between inputs and output using the method of regressive analysis. The present article provides an insight into the Data Envelopment Analysis method as a tool for measuring productivity. This technique enables a rather accurate evaluation of terminal productivity by means of comparative analysis, which, in fact, appears to be the only feasible alternative in cases where statistic data required for performing regressive analysis is lacking.

Characteristics of sludge reduction in an integrated pretreatment and aerobic digestion process

2006 ◽  
Vol 53 (7) ◽  
pp. 235-242 ◽  
Author(s):  
S. Hwang ◽  
H. Jang ◽  
M. Lee ◽  
J. Song ◽  
S. Kim
Keyword(s):  
Total Suspended Solid ◽  
Suspended Solid ◽  
Reduction Ratio ◽  
Effective Dosage ◽  
Ozone Treatment ◽  
Sludge Reduction ◽  
Aerobic Digestion ◽  
Cake Volume ◽  
Sludge Cake ◽  
Feasible Alternative

In this study, integrated pretreatments and aerobic digestion processes were investigated in order to provide a feasible alternative that can achieve effective sludge reduction. An ozone treatment in the presence of ionic manganese, a catalyst, increased the sludge reduction ratio three times higher than that of a single ozonation, presumably due to an increase in OH radical production. The ozone treatment yielded the effective sludge reduction ratio with an increasing ozone dosage, and an effective dosage of the catalyst was found to be 4 mg-Mn/g-TS. When a mechanical pretreatment and an ozone/catalyst were applied in a series, the integrated process, even at a half mechanical intensity and a half level of ozone dosage, showed higher and faster sludge reduction than each single process did. In addition, the integrated pretreatment process showed the highest dewaterability of the treated sludges. A ratio of sludge cake generation, which was newly introduced to quantify overall performance of sludge treatment processes, showed that the integrated pretreatment followed by the aerobic digestion yielded approximately a half of the sludge cake volume compared to the single aerobic digestion. Therefore, the integrated pretreatment can be a feasible method for the effective reduction of total suspended solid and the final volume.

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