PyPore3D: An Open Source Software Tool for Imaging Data Processing and Analysis of Porous and Multiphase Media

n this work, we propose the software library PyPore3D, an open source solution for data processing of large 3D/4D tomographic data sets. PyPore3D is based on the Pore3D core library, developed thanks to the collaboration between Elettra Sincrotrone (Trieste) and the University of Trieste (Italy). The Pore3D core library is built with a distinction between the User Interface and the backend filtering, segmentation, morphological processing, skeletonisation and analysis functions. The current Pore3D version relies on the closed source IDL framework to call the backend functions and enables simple scripting procedures for streamlined data processing. PyPore3D addresses this limitation by proposing a full open source solution which provides Python wrappers to the the Pore3D C library functions. The PyPore3D library allows the users to fully use the Pore3D Core Library as an open source solution under Python and Jupyter Notebooks PyPore3D is both getting rid of all the intrinsic limitations of licensed platforms (e.g., closed source and export restrictions) and adding, when needed, the flexibility of being able to integrate scientific libraries available for Python (SciPy, TensorFlow, etc.)

A Novel Framework for Visual Detection and Exploration of Performance Bottlenecks in Organic Photovoltaic Solar Cell Materials

Current characterization methods of the so-called Bulk Heterojunction (BHJ), which is the main material of Organic Photovoltaic (OPV) solar cells, are limited to the analysis of global fabrication parameters. This reduces the efficiency of the BHJ design process, since it misses critical information about the local performance bottlenecks in the morphology of the material. In this paper, we propose a novel framework that fills this gap through visual characterization and exploration of local structure-performance correlations. We also propose a formula that correlates the structural features with the performance bottlenecks. Since research into BHJ materials is highly multidisciplinary, our framework enables a visual feedback strategy that allows scientists to build intuition about the best choices of fabrication parameters. We evaluate the usefulness of our proposed system by obtaining new BHJ characterizations. Furthermore, we show that our approach could substantially reduce the turnaround time

Évaluation de la pollution des eaux usées mixtes collectées par le réseau d’assainissement de la ville de Mohammedia : Cas d’un collecteur principal

Wastewaters of the urban district of Mohammedia drained by the collector, is rejected without treatment in the sea have pH close relations of neutrality and is relatively saline with a content chloride of about 1207mg/l. The polluting load is included/understood between 32 mg/l and 312 mg/l for the BDO5, 1144.27 mg/l and 2743.12 mg/l for the DOC and between 329 mg/l and 632 mg/l for the suspended matters. Calculated report/ratio DOC/BDO5 is 16.4, very high value, which shows that this wastewaters is characterized by an inorganic pollution in particular related to the rejection of the effluents of an industry of textile and tannery connected to this collector. These effluents are used to irrigate the cultures of the perimeter of sea and constitute an environmental risk for the subjacent ground water and for water of the Oued El maleh.Les eaux usées de la commune urbaine de Mohammedia, drainées sans traitement dans la mer ont des pH proches de la neutralité avec une teneur en chlorures de l'ordre de 1207mg/l. Les teneurs en matières polluantes sont comprises entre 32 mg/l et 312 mg/l pour la DBO5, 1144.27mg/l et 2743.12 mg/l pour la DCO et entre 329 mg/l et 632 mg/l pour les matières en suspension. Le rapport DCO/DBO5 est de 16.4, ce qui est lié à la pollution industrielle notamment au rejet des effluents de l’industrie textile et des rejets de tannerie raccordées au collecteur. Ces effluents servent à irriguer les cultures du périmètre de la mer et constituent un risque environnemental pour la nappe phréatique sous-jacente et pour les eaux de surface  d’Oued El maleh

Pollution reduction and biodegradability index improvement of tannery effluents

Al2 (SO4)3, 18H2O, FeCl3 and Ca (OH)2 were used for the treatment of tannery wastewaters. The influences of pH and coagulant dosages were studied. Conditions were optimised according to the pollutant removal efficiencies, the volume of decanted sludge and the biodegradability index improvement. The results indicate that 6771% of total COD, 76-92% of color and 79-97% of Cr can be removed using the optimum coagulant dosages at the optimum pH range. Al2 (SO4)3, 18H2O and Ca (OH)2 produced better results than FeCl3 in terms of COD, color and Cr removal as well as in terms of biodegradability improvement. Moreover, Al2 (SO4)3, 18H2O and FeCl3 produced the least amount of sludges for a given amounts of COD, color and Cr removed in comparison with Ca (OH)2. Al2 (SO4)3, 18H2O seems to be suitable for yielding high pollutant removals and corresponding low volumes of decanted sludges in addition to improving wastewaters biodegradability index

TREATMENT OF TEXTILE WASTEWATER USING A CONTINUOUS FLOW ACTIVATED SLUDGE SYSTEM AT PILOT-SCALE

Textile industry wastewaters contain high concentrations of organic matter, toxic substances and dyes and pigments, and are harmful to receiving environment. Activated sludge system at pilot scale with continuous feeding, was used for the treatment of a dyeing unit effluent. The results showed that treatment allows a removal rate of 40-56 % of chemical oxygen demand (COD), and 13 to 30 % of color. The adsorption on sludge appears to be the main process responsible for the color removal of wastewater generated by textile industry

Compostage des boues produites à la station d'épuration d'une huilerie, en mélange avec les déchets de jardin

The aim of this work was to study the composting of sewage sludge produced by wastewater treatment station of an oil-producing factory (Lesieur Casablanca). The characterization of this sludge was carried out on eight samples (one sample per week). Physical and chemical analyses show that the eight sludge samples do not have the same composition, thus it is difficult to determine a standard treatment process. The results show that the pH of all samples is between 4,5 and 5. Their organic carbon content is very important in relation to nitrogen, which lead to a C/N ratio unfavourable to start a composting process. The mixture of this sludge with garden waste solves this problem. The C/N ratio obtained allows a good microbial biomass development, which speeds up the biodegradation of organic matter. By this mixture, the sludge has a new texture allowing a good aeration and oxygen diffusion. Composting process duration was 90 days. The results show a progressive temperature increase, reaching the maximal value of 55°C at the 21st day. The organic matter content decreases progressively during the composting process from 845mg/g to 590mg/g. The organic carbon measured by the ANNE method decreases from 486mg/g to 318mg/g, while a small decrease of nitrogen content was observed. The composting process of Lesieur sewage sludge in mixture with garden waste gives a stable compost and without smell. The final compost can be used in agriculture as a soil fertilizer.Dans ce travail, nous avons étudié le compostage des boues provenant d'une station d'épuration d'une industrie agro-alimentaire. La caractérisation de ces boues est réalisée sur huit prélèvements hebdomadaires à la sortie de la station. Les paramètres physicochimiques obtenus durant plusieurs compagnes de prélèvement ont montré que la qualité des boues diffère d'une compagne à l'autre ce qui peut rendre difficile le choix de la technique de traitement. En outre, ces résultats montrent que le pH varie entre 4,5 et 5 tandis que la concentration en carbone organique est importante par rapport à la teneur en azote. Le traitement des boues en mélange avec les déchets de jardin par compostage a permis d'améliorer le rapport C/N ce qui favorise le développement de la biomasse et facilité la biodégradation des matières organiques. En outre, la porosité adéquate ainsi obtenue permet une bonne pénétration de l'oxygène au sein des déchets à composter. Le traitement par compostage du mélange (boues + déchets de jardin) a duré 90 jours. Les résultats ont montré une augmentation progressive de la température au cours du temps pour atteindre son maximum (55°C) vers le 21ème jour tandis que la teneur en matière organique diminue avec le temps et se stabilise au bout du 80ème jour. La teneur en matière organique passe de 845 mg/g de matière sèche à 590 mg/g à la fin du compostage. Le carbone organique dosé par la méthode ANNE diminue pour passer de 486 mg/g de matière sèche à 318mg/g, tandis qu'une légère diminution de la teneur en azote a été observée. Le compostage des boues de la station d'épuration de l'unité industrielle concernée en mélange avec les déchets de jardin permet d'aboutir à un produit stable sans odeur pouvant être valorisé en agriculture

A Novel Framework for Visual Detection and Exploration of Performance Bottlenecks in Organic Photovoltaic Solar Cell Materials

Current characterization methods of the so-called Bulk Heterojunction (BHJ), which is the main material of Organic Photovoltaic (OPV) solar cells, are limited to the analysis of global fabrication parameters. This reduces the efficiency of the BHJ design process, since it misses critical information about the local performance bottlenecks in the morphology of the material. In this paper, we propose a novel framework that fills this gap through visual characterization and exploration of local structure-performance correlations. We also propose a formula that correlates the structural features with the performance bottlenecks. Since research into BHJ materials is highly multidisciplinary, our framework enables a visual feedback strategy that allows scientists to build intuition about the best choices of fabrication parameters. We evaluate the usefulness of our proposed system by obtaining new BHJ characterizations. Furthermore, we show that our approach could substantially reduce the turnaround time.This is the pre-peer reviewed version of the following article: Aboulhassan, Amal, Daniel Baum, Olga Wodo, Baskar Ganapathysubramanian, Aram Amassian, and Markus Hadwiger. "A novel framework for visual detection and exploration of performance bottlenecks in organic photovoltaic solar cell materials." In Computer Graphics Forum, vol. 34, no. 3, pp. 401-410. 2015, which has been published in final form at DOI: 10.1111/cgf.12652. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.</p