scholarly journals Optimization and Degradation Studies on Hexahydro-1,3,5-Trinitro-1,3,5-Triazine (RDX) with Selected Indigenous Microbes under Aerobic Conditions

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1257
Author(s):  
Arjun Meda ◽  
Pritam Sangwan ◽  
Kiran Bala
Keyword(s):  
Aqueous Medium ◽  
High Performance ◽  
North India ◽  
Contaminated Sites ◽  
Human Beings ◽  
Initial Concentration ◽  
Manufacturing Facility ◽  
Intermediate Products ◽  
Inoculum Volume ◽  
Bacillus Toyonensis

Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) a nitramine explosive, which has contaminated various military sites during its use, storage and manufacturing worldwide. As RDX is a recalcitrant, less soluble and toxic to human beings and other organisms, it is essential to remediate the contaminated sites. In the current investigation, authors have explored the potential of two indigenous microbes i.e., Bacillus toyonensis (isolate No. WS4-TSB-3, MTCC No. 12857) and Paenibacillus dendritiformis (isolate No. S10-TSA-3, MTCC No. 12859) isolated from an explosive manufacturing facility in north India, for the degradation of RDX in aqueous medium. Furthermore, RDX degradation has been optimized using response surface methodology (RSM) in a 15 days experiment at concentration of 20, 40, and 60 mg/L. It was found that various factors such as initial concentration of RDX, inoculum volume (2, 4 and 6%) and time (5, 10 and 15 days) had impact on transformation and degradation of contaminant. Samples were analyzed using high performance liquid chromatography (HPLC) and intermediate products were identified using LC-MS/MS. Maximum RDX removal of 81.6 ± 1.3 and 84.7 ± 0.9% for Bacillus toyonensis (isolate No. WS4-TSB-3) and Paenibacillus dendritiformis (isolate No. S10-TSA-3), respectively, was observed on 15th day at 40 mg/L initial concentration. During the degradation Hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine (MNX), Hexahydro-1,3-dinitroso-5-nitro-1,3,5-triazine (DNX), 4-Nitro-2,4-diazabutanal, Bis(hydroxymethyl)nitramine and nitrite were identified as intermediate products. The findings of the investigation suggest that both the microbes have the potential to degrade RDX in the aqueous medium and can be used for up-scaling the degradation of RDX on explosive contaminated sites.

Finite Element Model to Predict the Bioconversion Rate of Glucose to Fructose using Escherichia coli K12 for Sugar Production from Date

2015 ◽  
Vol 11 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Maher Trigui ◽  
Karim Gabsi ◽  
Walid Zneti ◽  
Suzelle Barrington ◽  
Ahmed Noureddine Helal
Keyword(s):  
Escherichia Coli ◽  
Induction Time ◽  
Volume Fraction ◽  
Element Model ◽  
Initial Concentration ◽  
Computational Fluids Dynamics ◽  
Date Syrup ◽  
Computational Fluids ◽  
Two Phases ◽  
Inoculum Volume

Abstract In this study, Bioconversion process of glucose to fructose from date syrup using Escherichia coli K12 is modeled using a commercial computational fluids dynamics (CFD) code fluent FLUENT 6.3.23 [8] which we implemented a user-defined functions (UDF) to simulate the interrelationships at play between various phases. A two phases CFD model was developed using an Eulerian – Eulerian approach to calculate the fructose volume fraction produced during time. The bioconversion process was studied as function of three initial concentration of glucose (0.14, 0.242 and 0.463gL–1), three induction time (60, 120 and 180 mn) and three inoculum volume (100, 120 and 150mL). The numerical results are compared with experimental data for bioconversion rate and show good agreement (R2= 0.894). The optimal condition of diffusion was obtained by applying an initial concentration of glucose less than 0.2gL–1 and induction time great than 100 minutes.

Fenton degradation of Cartap hydrochloride: identification of the main intermediates and the degradation pathway

2015 ◽  
Vol 72 (7) ◽  
pp. 1198-1205 ◽  
Author(s):  
Kaixun Tian ◽  
Cuixiang Ming ◽  
Youzhi Dai ◽  
Kouassi Marius Honore Ake
Keyword(s):  
Aqueous Medium ◽  
Flue Gas ◽  
High Performance ◽  
Oxygen Demand ◽  
Nitrogen Monoxide ◽  
Degradation Pathway ◽  
Gas Chromatograph ◽  
Gas Analyzer ◽  
Fenton System ◽  
Long Chain

The advanced oxidation of Cartap hydrochloride (Cartap) promoted by the Fenton system in an aqueous medium was investigated. Based on total organic carbon, chemical oxygen demand and high-performance liquid chromatography, the oxidation of Cartap is quite efficient by the Fenton system. Its long chain is easily destroyed, but the reaction does not proceed to complete mineralization. Ion chromatography detection indicated the formation of acetic acid, propionic acid, formic acid, nitrous acid and sulfuric acid in the reaction mixtures. Further evidence of nitrogen monoxide and sulfur dioxide formation was obtained by using a flue gas analyzer. Monitoring by gas chromatograph-mass spectrometer demonstrated the formation of oxalic acid, ethanol, carbon dioxide, and l-alanine ethylamide. Based on these experimental results, plausible degradation pathways for Cartap mineralization in an aqueous medium by the Fenton system are proposed.

scholarly journals Reconfigurable platform for 3D-panoramic telepresence system for mobile applications

2021 ◽  
Author(s):  
Artur Saakov
Keyword(s):  
High Performance ◽  
Outer Space ◽  
Nuclear Industry ◽  
Human Beings ◽  
Reconfigurable Logic ◽  
Logic Devices ◽  
Hazardous Environments ◽  
High Bandwidth ◽  
Reconfigurable Platform ◽  
Bomb Disposal

The concept of telepresence allows human beings to interact with hazardous environments and situations without facing any actual risks. Examples include the nuclear industry, outer space and underwater operations, mining, bomb disposal and firefighting. Recent progress in digital system technology, especially in technology of reconfigurable logic devices (e.g. FPGA), allows the effective implementation of advanced embedded systems characterized by high-performance data processing and high-bandwidth communication. However, most of the existing telepresence systems do not benefit from these advancements. Therefore, the goal of this work was to develop a concept and architecture of the platform for the 3D-Panoramic Telepresence System for mobile robotic applications based on reconfigurable logic devices. During the development process, two versions of the system were implemented. The first system focused on feasibility testing of major components of the proposed architecture. Based on the experimental results obtained on the first prototype of the system and their analyses, a set of recommendations were derived for an updated version of the system. These recommendations were incorporated into the implementation of the second and final version of the system.

scholarly journals Design and Simulation DFIM Driven Electrical Vehicles Based on IP Controller

2018 ◽  
Vol 17 (2) ◽  
pp. 43-50
Author(s):  
Al-Mayhedee Zubair ◽  
Mohammad Abdul Mannan ◽  
Junji Tamura
Keyword(s):  
High Performance ◽  
Speed Control ◽  
Pi Controller ◽  
Human Beings ◽  
Environment Friendly ◽  
Fundamental Goal ◽  
Electrical Vehicles ◽  
Electrical Vehicle ◽  
High Performance Application ◽  
Control Application

The environment friendly blessings of Electrical Vehicles (EV), human beings are becoming extra involved in the use of them alternatively than the usage of mechanical differentials. In electrical vehicles distinct sorts of electrical machines are used among them DFIM is used in this work. The challenging work is to design of a controller as the output of the motor has to match with vehicle input. So, far, most of the mentioned works have utilized Proportional-Integral (PI) controllers as the speed control. But, the negative aspects of PI controller are properly known, as its design depends on the specific motor parameters and the overall performance is sensitive to system disturbances. The fundamental goal of this paper is to replace the conventional PI controller by means of an IP controller which is successful of dealing with exceedingly non-linear DFIM motor for high performance application in Electrical Vehicle. The effectiveness of designed IP controller of an electrical differential for an EV system is evaluated through Matlab/Simulink software. In simulation work different road conditions for EV are considered. After the simulation the designed controller is found to be strong for the speed control application of Electrical Vehicle.

scholarly journals TOTAL QUALITY MANAGEMENT: PARADIGMA BARU MANAGEMEN PERGURUAN TINGGI DALAM MENGHADAPI PERSAINGAN KUALITAS PENDIDIKAN

2017 ◽  
Vol 3 (1) ◽  
pp. 67
Author(s):  
Wariyanti Wariyanti
Keyword(s):  
Total Quality Management ◽  
High Performance ◽  
Educational Process ◽  
Public Institution ◽  
Human Beings ◽  
Total Quality ◽  
National Education ◽  
The World ◽  
Fear Of God ◽  
Agent Of Change

<p>College is one of the means to build community. Universities can also be regarded as the agent of change in society and even the world. Humans were expected today are capable of developing their potential throughout. Overview whole human beings has been defined in the law No. 20 of 2003 on the System Pendidian National Article 3 which states that the National Education aims at developing students' potentials in order to become a man of faith and fear of God Almighty, noble, healthy, knowledgeable, skilled, creative, independent, and become citizens of a democratic and accountable. Based on these conditions, a University is a public institution undertaking the community to help to create students who have the expected quality. With the demands of current conditions it is necessary seoramg leaders and members who have high performance in managing and running the educational process. While universities are expected are universities which have members who are always learning to achieve a change for the better in serving the community.</p>

High performance flexible asymmetric CNO-ZnO//ZnO supercapacitor with an operating voltage of 1.8 V in aqueous medium

2017 ◽  
Vol 7 ◽  
pp. 212-221 ◽  
Author(s):  
Debananda Mohapatra ◽  
Smrutiranjan Parida ◽  
Subramanya Badrayyana ◽  
Balwant K. Singh
Keyword(s):  
Aqueous Medium ◽  
High Performance ◽  
Operating Voltage

scholarly journals The Industrial Internet and the Future of Work

2015 ◽  
Vol 137 (09) ◽  
pp. 30-35 ◽  
Author(s):  
Marco Annunziata ◽  
Stephan Biller
Keyword(s):  
Production Process ◽  
Technological Progress ◽  
High Performance ◽  
Human Beings ◽  
Future Of Work ◽  
Industrial Internet ◽  
The Future ◽  
Production Techniques ◽  
Performance Computing ◽  
Better Than

This article focuses on the transformation and dimming lines between digital and physical worlds. Industrial Internet tools and applications also help people collaborate in a faster and smarter way – making jobs not just more efficient but more rewarding. Technological progress and economic growth are contributing to a seismic shift in the role that human beings play in the production process. Technological progress, notably in high-performance computing, robotics, and artificial intelligence, is extending the range of tasks that machines can perform better than humans can. The Future of Work is being shaped by a profound transformation, driven by the meshing of the digital and the physical worlds, the emergence of new design and production techniques, and a seismic shift in the role that human beings play in the production process. Technological progress is expected to push a growing share of the workforce toward creativity and entrepreneurship, where humans have a clear comparative advantage over machines.

scholarly journals Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

2019 ◽  
Vol 16 (3) ◽  
pp. 343 ◽  
Author(s):  
Rui Zhao ◽  
Xuan Zhang ◽  
Fanli Chen ◽  
Xiaobing Man ◽  
Wenqiang Jiang
Keyword(s):  
High Performance ◽  
Degradation Mechanism ◽  
Electrochemical Process ◽  
Electrode Spacing ◽  
Human Beings ◽  
Electrochemical Degradation ◽  
Dimensionally Stable Anodes ◽  
Liquid Chromatograph ◽  
Crack Network ◽  
Electrolysis Condition

The widely used sulfonylurea herbicides have caused negative effects on the environment and human beings. Electrochemical degradation has attracted much attention in the treatment of refractory organic compounds due to its advantage of producing no secondary pollution. Three kinds of IrO2-based dimensionally stable anodes (DSAs) were used to degrade nicosulfuron by a batch electrochemical process. The results showed that a well-distributed crack network was formed on the Ti/Ta2O5-IrO2 electrode and Ti/Ta2O5-SnO2-IrO2 electrode due to the different coefficients of thermal expansion between the Ti substrate and oxide coatings. The oxygen evolution potential (OEP) increased according to the order of Ti/RuO2-IrO2 < Ti/Ta2O5-SnO2-IrO2 < Ti/Ta2O5-IrO2. Among the three electrodes, the Ti/Ta2O5-IrO2 electrode showed the highest efficiency and was chosen as the experimental electrode. Single factor experiments were carried out to obtain the optimum electrolysis condition, shown as follows: currency intensity 0.8 A; electrode spacing 3 cm, electrolyte pH 3. Under the optimum conditions, the degradation of nicosulfuron followed first-order kinetics and was mainly due to indirect electrochemical oxidation. It was a typical diffusion-controlled electrochemical process. On the basis of the intermediate identified by high performance liquid chromatograph-mass spectrometry (HPLC-MS), two possible degradation routes were proposed.

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