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International Conference on Production and Operations Management, POMS 2021

作者： Netto, Luiz Fernando Sanghikian, Alex Igor Yoshizaki, Hugo Tsugunobu Yoshida de Brito Junior, Irineu Chico Mendes Institute for Biodiversity Conservation Pirassununga Brazil Department of Production Engineering Sao Paulo State University Sao Paulo Brazil Graduate Program in Logistics Systems Engineering Sao Paulo University Sao Paulo Brazil Environmental Engineering São Paulo State University Sao Jose dos Campos Brazil

ISBN: (纸本)9783031068614

During the response and recovery phases of a disaster, an important issue is waste management, which includes generation, transportation, transfer, processing, recycling, and reuse of debris. In this paper, we analyzed the logistical process related to the management of 5400 metric tons of waste from the 2019 oil spill in Brazil, considering environmental impacts and cleaning efforts. The analyses show the quantities handled by the state governments responsible for the operation and the main destination of the residues, which was the cement industry. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Waste management

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Evaluation of a two-stage passive treatment approach for Mining Influenced Waters

Evaluation of a two-stage passive treatment approach for Min...

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24th National Meetings of the American Society of Mining and Reclamation 2007: 30 Years of SMCRA and Beyond

作者： Figueroa, L. Miller, A. Zaluski, M. Bless, D. Environmental Science and Engineering Colorado School of Mines Golden CO 80401 United States Butte MT 57901 United States Mine Waste Technology Program Sustainable Technology Division Systems Analysis Branch Cincinnati OH 45268 United States

ISBN: (纸本)9781604233285

A two-stage passive treatment approach was assessed at a bench-scale level using two Colorado Mining Influenced Waters (MIWs). The first-stage was a limestone drain with the purpose of removing iron and aluminum and mitigating the potential effects of mineral acidity. The second stage was a sulfate reducing bioreactor composed solely of 50% corn stover and 50% walnut shells by volume. The primary difference in the two MIWs was the concentration of zinc 5-7 mg/L for the National Tunnel Adit drainage (NTA) vs. 65-75 mg/L for the Silver Cycle Adit drainage (SCA). The limestone pretreatment columns reduced the zinc in the NTA MIW to 1-2 mg/L and the SCA MIW to 38 - 56 mg/L. The two SCA biocolumns had similar zinc removal but different sulfate removal with time. The sulfate reduction rate (SRR) for the SCA columns peaked at day 50 but at 0.5 mol S/m3/d for column 1 and 0.3 mol S/m3/d for column 2. Average SRR after day 50 was 0.24 and 0.13 mol S/m3/d for columns 1 and 2, respectively. The NTA columns (3 and 4) sustained an averaged SRR of 0.3 mol S/m3/d for days 30-130. The effluent zinc after startup from the two systems were

关键词： Bioreactors

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CVN 68 class solid waste flow analysis

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 73-87页

作者： Markle, SP Gill, SE LCdr. Stephen P. Markely USN:is a career Engineering Duty Oficer assigned to Naval Sea Systems Command Arlington VA where he is Deputy Directol Environmental Protection Systems Division (SEA 03 LIB). He is responsible for Program Management activities associated with all afloat environmental protection equipment and serves on several teams designed to promote Navy wide awareraess of environmental protection requirements and Navy programs to meet these challenges. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Zchmlogy where he received a Naval Engineering Degree and Master of Science in Mechanical Engineering. His interest in environmental issues predates his undergraduate studies at Syracuse UniversitylState University of New York College of Environmental Science and Forestw where he received a Bachelm of Science degree in Forrest Engineering from the School of Environmental and Resource Engineeriw. LCdr Markle has qualified as a Surface Warfare Oficer and in submarines through Engineering Duty Dolphin Program. He is a Professional Engineer registered in the State of New York and is a member ofASNE NSPE ASTM SNAME and SAE. Sean G. Gill:is a Senior Engineer with GEO-CENTERS incorporated in Pittsburgh PA where he provides technical and administrative support to the Naval Sea Systems Command (SEA 03L1) and the Carderock Division of the Naval Surfme Waflare Center (Code a) principal& on the shipboard and submarine solid waste management programs. Prior to joining GEO-CENTERS incorporated in 1996 he worked for eleven years at the Carderock Division of the Naval Surfme Warfare Center as a project engineer and a Branch Head. In the former capacity Mr Gill participated in various blackwatel gray watel and oily wastewater treatment projects oversaw the development of the Navy Pulper and was Center's technical team leader for the NAVSEA Solid Waste management program. In 1994 he was assigned to be Branch Head of Code 634 the Solid Waste Management

Through a detailed Research and Development program, the U.S. Navy has developed a suite of shipboard solid waste management equipment enabling compliance with federal and international law. Four major equipment types have been developed to outfit twenty-seven classes of naval surface ships. The major equipment types are: Plastic Waste Processor (PWP), Metal/Glass Shredder (MGS), Large Pulper (LP), and Small Pulper (SP). The Navy is aggressively procuring and installing this equipment aboard all ships of FFG 7 Class and larger. A deadline of December 31, 2000 has been set for completion. engineering analysis and held waste generation studies were conducted to select the specific equipment suite and develop alteration documentation for each ship class. Specific factors in this process were: solid waste generation rates, equipment reliability analysis, ship arrangement considerations, daily equipment operation Limits, and shipboard quality of life issues. A solid waste management study was conducted in the fall of 1997 to validate Navy equipment and ship design parameters onboard the USS John C. Stennis (CVN 74). Generation rates for shipboard solid waste were determined for plastic, metal and glass, food, paper, cardboard, fabric and wood. engineering analysis of data allowed a decrease in CVN 68 Class design waste generation rates. engineering analysis enabled a reduction in the number of PWPs and MGSs required, and fewer spaces for efficient operation. Ship arrangement studies were conducted to optimize efficiency and equipment mix of Solid Waste Processing Rooms (SWPRs) relative to waste generation sites. This paper briefly articulates the process followed by the Navy in responding to regulations governing solid waste management in the marine environment. Evidence validating the engineering procedures followed is presented.

关键词： Ship equipment

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Aerobic treatment of liquid swine manure using polymer: Evaluation for ammonia emissions reduction and nitrogen retention

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engineering in Agriculture, Environment and Food 2016年第3期9卷 257-263页

作者： Kafle, Gopi Krishna Chen, Lide Glaze, Benton Tindall, Terry Yadanaparthi, Sai Krishna Reddy Biological Systems Engineering Washington State University PullmanWA99164 United States Department of Biological and Agricultural Engineering University of Idaho MoscowID83844 United States Department of Animal and Veterinary Science University of Idaho MoscowID83844 United States J.R. Simplot Company BoiseID83702 United States Environmental Science Program University of Idaho MoscowID83844 United States

In the present study, the effectiveness of polymer (maleic-itaconic acid) on ammonia (NH3) emissions reduction and in retaining nitrogen (N) in fresh liquid swine manure (SM) was evaluated. The relationship between pH and NH3 emission was also determined. Different doses of polymer (namely Treatment 1 = T1 = 0.8 L polymer/ton of manure, Treatment 2 = T2 = 1.6 L polymer/ton of manure, Treatment 3 = T3 = 2.4 L polymer/ton of manure, and Treatment 4 = T4 = 3.2 L polymer/ton of manure) were added to the SM and its effects were observed for 30 d. The tests results showed significant reduction in pH for T1, T2, T3 and T4 compared to control (C). For the short term (up to 3d) T2, T3, and T4 showed significantly lower NH3 gas concentrations than C, however, for the long term (up to 10–20 d) only T4 continued to indicate significantly lower NH3 gas concentrations. Although numeric observations were reported for other treatments (T1, T2 and T3), no significant differences in NH3 gas concentrations were found. The NH3 emissions reductions were calculated in the range of 81–92%, 31–88%, −39–61%, 6–41%, −106% to −6% for the treatment period of 1, 3, 10, 20 and 30 d, respectively. The addition of polymer resulted in no significant difference in total ammonia nitrogen (TAN) and NO3−–N concentration. However, the addition of polymer had a significant influence on total Kjehldahl nitrogen (TKN) and soluble chemical oxygen demand (SCOD) concentration. The NH3 gas emissions strongly correlated with the manure pH (R2 = 0.911–0.999). © 2016 Asian Agricultural and Biological engineering Association

关键词： Manures

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The impact of two-way formative feedback and web-enabled resources on student resource use and performance in materials courses 122

The impact of two-way formative feedback and web-enabled res...

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2015 122nd ASEE Annual Conference and Exposition

作者： Krause, Stephen J. Baker, Dale R. Carberry, Adam R. Alford, Terry L. Ankeny, Casey Jane Brooks, Bill Jay Koretsky, Milo Gibbons, Brady J. Arizona State University Materials Science Program Fulton School of Engineering United States Arizona State University School of Biological and Health Systems Engineering United States Oregon State University School of Chemical Biological and Environmental Engineering United States Oregon State University Department of Chemical Engineering United States Oregon State University United States

Two-way formative feedback has been used extensively in the JTF (Just-in-Time-Teaching with Frequent Formative Feedback) project to help instructors understand student thinking and respond with directed feedback and creation of web-enabled student learning resources. When students respond to an open-ended question about issues on content and concepts in a class (e.g. Muddiest Points) their anonymous responses extend beyond the boundaries of the framework an instructor uses to organize, communicate, assess and evaluate their knowledge and understanding. So, if there are hidden issues that impede student learning, such as misconceptions, skill gaps (like charting), difficult concepts, vocabulary ambiguities, etc., the instructor may never become aware of them. In formative feedback students' needs and issues are the defining framework of learning issues, impediments, and barriers that an instructor can address for more effective teaching. Thus, students are empowered to play a role in their learning when they provide input about their instruction. Instructors in the JTF project have created a variety of web-enabled tools and resources to address issues revealed by student feedback acquired by using Concept Warehouse or Blackboard survey tools. One tool is "pencasts" in which a smart pen captures a person's writing and/or drawing on a notepad along with audio input to make a "pencast" recording as an audio PDF. These tutorial problem pencasts have been made into videos for the YouTube on the channel MSEASUproblems. Another popular student resource is Muddiest Point YouTube videos at ***/user/MaterialsConcepts. Another resource is at ***, a web-enabled illustrated vocabulary resource at http://***/MatSciASU. A final resource is ***, a public web site to which slide sets can be uploaded, with an example at http://***/mseasuslides. The use of these and other resources, such as textbooks, class notes, course slide sets,

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Plastics in the marine environment

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environmental Toxicology and Chemistry 2014年第1期33卷 5-10页

作者： Koelmans, Albert A. Gouin, Todd Thompson, Richard Wallace, Nancy Arthur, Courtney Wageningen Netherlands Safety and Environmental Assurance Centre Sharnbrook Bedford United Kingdom Marine Biology and Ecology Research Centre School of Marine Science and Engineering Plymouth University Plymouth United Kingdom Marine Debris Program National Oceanic and Atmospheric Administration Silver Spring MD United States I.M. Systems Group Rockville MD United States Marine Debris Program National Oceanic and Atmospheric Administration Silver Spring MD United States

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Effect of Skeletonization on Energy Consumption of Water Distribution System

Effect of Skeletonization on Energy Consumption of Water Dis...

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World environmental and Water Resources Congress 2023: Adaptive Planning and Design in an Age of Risk and Uncertainty

作者： Pasha, M. Fayzul K. Perez, Luis Weathers, Matthew Smith, Brennan Dept. of Civil and Geomatics Engineering California State Univ FresnoCA United States Water Power Program and Energy-Water Resource Systems Group Environmental Sciences Division Oak Ridge National Laboratory Oak RidgeTN United States

ISBN: (数字)9780784484852

ISBN: (纸本)9780784484852

A skeletonized water distribution system (WDS) model plays an important role in decision making process for its design and operations in planning phase. Given energy is the main driving force to operate a WDS efficiently and with the recent hikes in energy price, the investigation of energy flow in WDS is much more important than ever before. While a skeletonized network is easy to handle and takes less amount of time to run, it should represent the real-world scenario including the demand and hydraulics as accurately as possible. Failure to represent real-world scenario can mislead design and operational decisions including energy consumptions and delivery pressure. The purpose of this paper is to investigate how the energy flow in a WDS varies with the extent of the skeletonized network. Keeping the total demand constant for a network and the spatial distribution of the demand within a range in the skeletonized networks, how the energy consumption at the pump station, energy loss in the pipe, and the energy storage in the tank vary with the size of the skeletonized networks are investigated in this study. Energy balance model has been set up for each skeletonized model to observe the impact on energy flow for a series of models. Since the number of pipes and nodes can impact hydraulics, which eventually impact the energy flow, the paper considers two types of networks: branch and loop water distribution systems. The study has been applied to two hypothetical literature networks. Due to skeletonization, the flow pattern in the loop system changes more than that in the branch system causing higher percentage change of frictional energy loss in the loop system. The energy consumption or loss per unit demand per node in the skeletonized networks is found almost linear for the branch system. However, this parameter changes non-linearly in the skeletonized networks for the loop system. © World environmental and Water Resources Congress *** rights reserved

关键词： Energy utilization

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Analytic modeling and experiments of tri-layer, electro-thermal actuators for thin and soft robotics

Analytic modeling and experiments of tri-layer, electro-ther...

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2017 IEEE International Conference on Robotics and Automation, ICRA 2017

作者： Tibi, Gal Sachyani, Ela Layani, Michael Magdassi, Shlomo Degani, Amir Technion's Autonomous Systems Program Technion - Israel Institute of Technology Haifa3200063 Israel Casali Center Institute of Chemistry Hebrew University of Jerusalem Jerusalem91904 Israel Civil and Environmental Engineering Department Israel Institute of Technology Haifa3200063 Israel

ISBN: (纸本)9781509046331

By bonding micron-thin polymer layers with an electrically conductive layer, we can utilize the bi-metal effect to create a soft, thin, electrically-activated thermal actuator (ETA), which can be used in printed soft robots. Using ETAs have shown quite remarkable potential in previous works. However, to reveal their true capabilities, we propose to utilize a multi-layered ETA. In this research, we analytically model the actuator for both the bi-, and more importantly, tri-layer ETAs and analyze their behavior. We develop a simple intuitive model to better explain the benefits of the tri-layer actuation and to estimate the optimal design parameters. We verify the models by conducting an experiment to measure the curvature change for different third layer thicknesses. The experiments show a significant improvement in performance of the tri-layer actuators and display a good fit between the simplified analytic model and the full model. © 2017 IEEE.

关键词： Actuators

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Development of a Sparse Polynomial Chaos Expansions Method for Parameter Uncertainty Analysis

Development of a Sparse Polynomial Chaos Expansions Method f...

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作者： C X Wang J Liu Y P Li J Zhao X M Kong College of Fundamental Research Beijing Polytechnic School of Environmental Science and Engineering Xiamen University of Technology School of Environmental Beijing Normal University Research Scientist Environmental Systems Engineering ProgramFaculty of Engineering and Applied ScienceUniversity of Regina

Incorporating uncertainty assessment into hydrological simulation is of vital significance for providing valuable information for conserving and restoring the ecology environment in arid and semiarid regions. In this study, a sparse polynomial chaos expansions method was developed to quantify hydrological model parameter uncertainties on model performance in Kaidu river basin, China. A four dimension two order polynomial chaos expansions model was built and the effect of four parameters were quantified based on the coefficients of the polynomial chaos expansions model. Results indicated that precipitation in summer has more significant influence on model output than that in other seasons. High Sobol sensitivity indices values（0.22 in spring, 0.17 in summer, 0.21 in autumn and 0.29） for the interaction of precipitation and maximum capacity for fast store demonstrate that they are the major factors affecting runoff generation. These results can help reveal the flow processes and provide valuable information for water resources management.

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Steerable Burrowing Robot: Design, Modeling and Experiments

Steerable Burrowing Robot: Design, Modeling and Experiments

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Moran Barenboim Amir Degani Technion Autonomous Systems Program Technion - Israel Institute of Technology Haifa ISRAEL Faculty of Civil and Environmental Engineering and with the Technion Autonomous Systems Program Technion - Israel Institute of Technology Haifa ISRAEL

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

This paper investigates a burrowing robot that can maneuver and steer while being submerged in a granular medium. The robot locomotes using an internal vibro-impact mechanism and steers using a rotating bevel-tip head. We formulate and investigate a non-holonomic model for the steering mechanism and a hybrid dynamics model for the thrusting mechanism. We perform a numerical analysis of the dynamics of the robot's thrusting mechanism using a simplified, orientation and depth dependent model for the drag forces acting on the robot. We first show, in simulation, that by carefully tuning various control input parameters, the thrusting mechanism can drive the robot both forward and backward. We present several experiments designed to evaluate and verify the simulative results using a proof-of-concept robot. We show that different input amplitudes indeed affect the direction of motion, as suggested by the simulation. We further demonstrate the ability of the robot to perform a simple S-shaped trajectory. These experiments demonstrate the feasibility of the robot's design and fidelity of the model.

关键词： Robot kinematics Needles Numerical models Solid modeling Trajectory Springs

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