Готові списки джерел за темами / Electronic load control

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Добірка наукової літератури з теми "Electronic load control"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Electronic load control"

Yan, Xue Fei, Chang Qing Zhu, Yue Fei Zhao, and Qiao Jing An. "Research on AC Electronic Load." Applied Mechanics and Materials 556-562 (May 2014): 1811–13. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1811.

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The AC electronic load circuit is studied, PWM converter is used in this circuit in order to achieve the simulation function of load characteristics.The methods of how to get the command current mathematical model and simulation module is given which is based of the Matlab/Simulink platform, Hysteresis control mode is used in order to get fast and stable actual current and then carried on the simulation of the proposed electronic load. The simulation results show that the proposed algorithm and the control instruction current method and the effectiveness of the current control method, realized the simulation of ac electronic load.

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Li, Yan Jie, Tian Yu Cui, Ji Hai Jiang, and Cai Xin Yu. "The Principle of a Novel Load Sensing Hydraulic System and Design of the Electronic Control System." Applied Mechanics and Materials 233 (November 2012): 119–22. http://dx.doi.org/10.4028/www.scientific.net/amm.233.119.

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Abstract. Based on the load-sensing control principle, a novel type of electronic load sensing hydraulic system was developed. Taking a two-loads system for example, the design and analysis of the novel hydraulic system principle was completed and an electronic control system was accomplished using TTC60 controller. A preliminary experimental study was completed. The experimental studies show that the new system can not only achieve the traditional load-sensing control function, but also improve the level of electronic control system.

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Jeong, In Wha. "DC-Link Capacitor Voltage Balancing Control of a Five-Level Regenerative AC Electronic Load Using One-Cycle Control." Energies 14, no. 19 (September 24, 2021): 6101. http://dx.doi.org/10.3390/en14196101.

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High voltage electric power equipment requires rigorous regulation testing to specific standards which ensure proper and safe operation in the grid. Manufacturers conduct these tests in order to prove standard compliance and product liability. Variable linear or nonlinear loads are necessary for testing medium voltage (MV) high power AC power converters. Generally, those AC power converters or power supplies require performance validation, burn-in and/or lifetime testing under different load conditions, defined by the end-user or standards for the given applications. For flexible and efficient MV verification testing, this paper presents a five-level multilevel converter-based MV regenerative AC electronic load with one-cycle control (OCC), which is based on five-level diode-clamped multilevel converters with back-to-back structure and can emulate any impedance load. In this paper, especially the dc-link capacitor voltage balance of the proposed multilevel MV regenerative AC load is deeply analyzed. Simulation and experimental results are presented to verify the dc-link voltage balance performance of the proposed multilevel MV regenerative AC electronic load.

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Godovnikov, Evgeniy Aleksandrovich, and Ruslan Talgatovich Usmanov. "DEVELOPMENT OF SCADA-SYSTEM FOR ELECTRONIC LOAD CONTROL." Yugra State University Bulletin 13, no. 3 (September 15, 2017): 60–63. http://dx.doi.org/10.17816/byusu201713360-63.

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This article describes an automated electronic load control system. The peculiarity of this system is the unifi- cation of instrumental means intended for scientific research with the technologies of industrial automation.

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Banaś, Michal. "Control of the Hydrostatic Load Unit with the Electronic Control System." Solid State Phenomena 199 (March 2013): 657–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.199.657.

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The paper presents a hydrostatic load unit, its design and the operation principle. The load unit has been integrated with an electronic control system. The components of the control system as well as its advantages have been discussed. The benefits of the integration have been illustrated with the outline of work programs for the microcontroller.

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Upadhyay, Saurabh, Santanu Mishra, and Avinash Joshi. "A Wide Bandwidth Electronic Load." IEEE Transactions on Industrial Electronics 59, no. 2 (February 2012): 733–39. http://dx.doi.org/10.1109/tie.2011.2148680.

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Henderson, D. S., and W. Pearson. "An Improved Control Algorithm for an Electronic Load Governor." Measurement and Control 30, no. 10 (December 1997): 293–96. http://dx.doi.org/10.1177/002029409703001001.

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Feliachi, A. "Optimal Decentralized Load Frequency Control." IEEE Power Engineering Review PER-7, no. 5 (May 1987): 44–45. http://dx.doi.org/10.1109/mper.1987.5527250.

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He, Shi Chao, and Feng Kong. "The Application and Research on Electronic Load." Advanced Materials Research 566 (September 2012): 227–30. http://dx.doi.org/10.4028/www.scientific.net/amr.566.227.

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At present，for the application of the fuzzy PID controller is analyzed in electronic load，this paper according to the shortcomings of the controller improved fuzzy neural PID controller, through the BP neural network to realize fuzzy function, the results shows that this method is feasible and efficient. Finally the method was simulated on MATLAB, the control effect of overshoot and time delay on the application of improved fuzzy neural PID control was confirmed better than the former methods.

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Heffner, G. C., and D. A. Kaufman. "Distribution Substation Load Impacts of Residential Air Conditioner Load Control." IEEE Power Engineering Review PER-5, no. 7 (July 1985): 22–23. http://dx.doi.org/10.1109/mper.1985.5528448.

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Дисертації з теми "Electronic load control"

Jadric, Ivan. "Modeling and Control of a Synchronous Generator With Electronic Load." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36549.

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Design and analysis of a system consisting of a variable-speed synchronous generator that supplies an active dc load (inverter) through a three-phase diode rectifier requires adequate modeling in both time and frequency domain. In particular, the system's control-loops, responsible for stability and proper impedance matching between generator and load, are difficult to design without an accurate small-signal model. A particularity of the described system is strong non-ideal operation of the diode rectifier, a consequence of the large value of generator's synchronous impedance. This non-ideal behavior influences both steady state and transient performance. This thesis presents a new, average model of the system. The average model accounts, in a detailed manner, for dynamics of generator and load, and for effects of the non-ideal operation of diode rectifier. The model is non-linear, but time continuous, and can be used for large- and small-signal analysis. The developed model was verified on a 150 kW generator set with inverter output, whose dc-link voltage control-loop design was successfully carried out based on the average model.
Master of Science

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Han, Yunong. "Load-aware traffic control in software-defined enterprise Wireless Local Area Networks." Thesis, University of Essex, 2018. http://repository.essex.ac.uk/22379/.

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With the growing popularity of Bring Your Own Device (BYOD), modern enterprise Wireless Local Area Networks (WLANs) deployments always consist of multiple Access Points (APs) to meet the fast-increasing demand for wireless access. In order to avoid network congestion which leads to issues such as suboptimal Quality of Service (QoS) and degraded user Quality of Experience (QoE), intelligent network traffic control is needed. Software Defined Networking (SDN) is an emerging architecture and intensively discussed as one of the most promising technologies to simplify network management and service development. In the SDN architecture, network management is directly programmable because it is decoupled from forwarding layer. Leveraging SDN to the existing enterprise WLANs framework, network services can be flexibly implemented to support intelligent network traffic control. This thesis studies the architecture of software-defined enterprise WLANs and how to improve network traffic control from a client-side and an AP-side perspective. By extending an existing software-defined enterprise WLANs framework, two adaptive algorithms are proposed to provide client-based mobility management and load balancing. Custom protocol messages and AP load metric are introduced to enable the proposed adaptive algorithms. Moreover, a software-defined enterprise WLAN system is designed and implemented on a testbed. A load-aware automatic channel switching algorithm and a QoS-aware bandwidth control algorithm are proposed to achieve AP-based network traffic control. Experimental results from the testbed show that the designed system and algorithms significantly improve the performance of traffic control in enterprise WLANs in terms of network throughput, packet loss rate, transmission delay and jitter.

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Boesak, C. D. "Controller design via H[infinity] optimal control, quantitative feedback theory and fuzzy logic control : an application to load frequency control." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/5249.

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Bibliography: leaves 104-112.
This thesis describes the application of robust controller design techniques namely H[infinity] optimal control, fuzzy logic control and quantitative feedback theory to the load frequency control problem of power systems. It thus forms a comparative study of these design methods. Load frequency control is the closed loop control of electrical generating units to regulate the system frequency at its nominal value in the presence of load disturbances. Load frequency control also includes the regulation of the tie-line interchange powers.

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Akpolat, Zuhtu Hakan. "Application of fuzzy-sliding mode control and electronic load emulation to the robust control of motor drives." Thesis, University of Nottingham, 1999. http://eprints.nottingham.ac.uk/28390/.

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This thesis is concerned with the experimental investigation of robust speed control strategies for the industrial motor drive systems. The first objective of the thesis is to implement a high performance programmable dynamometer which can provide desired linear and non-linear mechanical loads for the experimental validation of the robust control methods. The discrete time implementation of the conventional dynamometer control strategy (the inverse model approach) is analysed and it is shown that this method suffers from the stability and noise problems. A new dynamometer control strategy, based on speed tracking and torque feedforward compensation, is developed and successfully implemented in the experimental system. The emulation is placed in a closed loop speed control system and the experimental results are compared with the corresponding ideal simulated results for the validation of the dynamometer control strategy. The comparisons show excellent agreement for a variety of linear and nonlinear mechanical load models and such a high performance experimental load emulation results are reported for the first time in research literature. The second objective of the project is to investigate the Fuzzy Logic Control (FLC) and the Sliding Mode Control (SMC) approaches in order to develop a simple,• algorithmic and practical robust control design procedure for industrial speed drive control systems. The Reaching Law Control (RLC) method, which is an approach to SMC design, and the FLC are used together in order to develop a practical robust speed control strategy. The robustness of the proposed control approach is tested for a variety of linear and non-linear mechanical loads provided by the dynamometer. Using the new robust control method, good output responses are obtained for large parameter variations and external disturbances.

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Skvorchevsky, A. Y. "ELS capacity control system for axial-piston pumps." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46920.

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Pandolfo, Massimiliano. "Modeling and control of a suspended load lifted by two aerial vehicles." Thesis, KTH, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206174.

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In this thesis we discuss the problem of lifting and stabilizing a bar-shaped slungload, held by two UAVs (Unmanned Aerial Vehicles) which are connected to it throughcables. A mathematical model of the system is presented. After describing the systemdynamics, we identify a set of equilibrium poses and discuss the stability of a point inthis set. Then, the Gazebo simulator is used to develop and test a controller capableof stabilizing the system, rejecting disturbances, and following basic trajectories.
I denna avhandling diskuterar vi problemet med att lyfta och stabilisera en stavformadhängande last, hållen av två UAV:er (obemannade luftfarkoster) vilka är anslutnatill den genom kablar. En matematisk modell av systemet presenteras. Efter attbeskriva systemdynamiken identifierar vi en uppsättning jämviktslägen och diskuterarstabiliteten i en punkt i denna uppsättning. Sedan används Gazebo-simulatorn föratt utveckla och testa en regulator med förmåga att stabilisera systemet, hanterastörningar, och följa grundläggande flygbanor.

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Joy, Dawn, and Karthik Sekaran. "Electronic Pump Control and Benchmarking of Simulation Tools : AMESim and GT Suite." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69567.

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Load sensing pumps in hydraulic system of wheel loaders helps in increasing the energy efficiency of wheel loaders. Present day machines have hydro mechanical load sensing system. After the advent of hydro mechanical load sensing concept, over the years, lots of research has been carried out relevant to electro hydraulic load sensing, trying to control the pump electronically. Currently, Volvo Construction Equipments (VCE) is interested in investigating the possibility of implementing electro hydraulic load sensing system in the wheel loaders. Research works has shown existence of several configurations of electro hydraulic load sensing pumps. Successful simulation results of an electro hydraulic load sensing pump configuration would provide a backing for the proposal of building and testing that configuration of electro hydraulic load sensing pump prototype. Also, the thesis work aims in benchmarking hydraulic system simulation capabilities of AMESim and GT- Suite by simulating the existing hydro mechanical load sensing system in both in both the simulation packages.
The thesis work has been carried out at Virtual Product Development (VPD) division of Volvo Construction Equipments (VCE), Eskilstuna, Sweden.

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Adolfsson, Mattias. "Developing a Graphical Application to Control Stepper Motors with Sensorless Load Detection." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-452735.

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For positioning of linear stages in absolute coordinates, there is a general need to find a reference position since the initial one is unknown. This is commonly called homing. To reduce costs and facilitate assembly, homing can be performed without additional sensors, known as sensorless homing. This thesis delves into sensorless homing, specifically with respect to stepper motors, and develops a graphical application for control of them. The commercial technology StallGuard is applied inconjunction with exploration into how it – and sensorless load detectionin general – functions. The resulting graphical application can be used to configure the stepper motors, perform homing using StallGuard, and automatically tune StallGuard to work despite varying conditions. In addition, rudimentary sensorless load detection independent from StallGuard is developed, demonstrating how it could work in practice. Testing shows homing with StallGuard resulting in a position within a ±5μm window in 94% of cases, less than 1/7 the width of an average strand of human hair. Additionally, homing is easily performed with a single button press from the graphical interface, with optional additional configuration available.

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Bordovský, Tomáš. "Elektronická zátěž s digitálním řízením." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220250.

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This diploma thesis deals with analysis and exploration of design options, how to design and produce an electronic load. The paper discussed the possibilities of digital control. It also describes the principles of structural components and there was chosen one type variant which is designed to circuits and printed circuit boards. Moreover, the thesis also include technical drawings of mechanical parts. At the end of this paper, final soulution with measurements and parameters are presented.

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Gandhi, Shubham. "Out-of-Loop Compensation Method for Op-Amps Driving Heavy Capacitive Loads." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1543.

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It is well known that real op-amps do not share most of the desirable characteristics of an ideal one, particularly those of gain and output impedance. When presented with a capacitive load, such as a MOSFET or ADC, feedback in an op-amp circuit can quickly become unstable. This thesis studies and characterizes an op-amp’s output impedance and how its interaction with this type of load creates a parasitic pole which leads to instability. Applying ideas from feedback control theory, a model for studying the problem is developed from which a generalized method for compensating the undesirable circumstance is formulated. Even in a zero-input state, many real op-amps driving capacitive loads can experience unforced oscillations. A case study is performed with three commonly used devices. First, the output impedance is determined by its dependence on the unity-gain bandwidth, load capacitance, and oscillation frequency. It is fitted into a second-order feedback control model that allows for an analytical study of the problem. It is then shown that a carefully designed passive network can be introduced between the load and op-amp to obtain a properly damped system free of oscillation and well-behaved. Using a shunt resistor is a known and commonly used method for lowering an op-amp’s output impedance to gain stability. This work considers the converse addition of a series capacitor to instead lower the load capacitance seen by the op-amp, a seemingly complementary method that achieves the same goal. A generalized, composite compensation method is developed that uses both the shunt resistor and series capacitor– a strategy not yet found in literature. Relevant formulas for damping ratio and natural frequency are derived that allow the design of a passive compensation network. Furthermore, tradeoffs between compensation, voltage swing, current consumption, and power usage are considered. An emphasis is placed on comparing simulated versus real circuits to highlight the fact that any problem is much worse in real-life than in a simulation. SPICE models and programs aim to de-idealize certain device characteristics, but often cannot account for environmental conditions and manufacturing variance. Thus, an importance is placed on experimental verification guided by simulations.

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Частини книг з теми "Electronic load control"

Arrillaga, J., and N. R. Watson. "Load Flow under Power Electronic Control." In Computer Modelling of Electrical Power Systems, 129–59. West Sussex, England: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118878286.ch5.

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Huo, QunHai, TongZhen Wei, and JiangBo Wang. "Study on Control of Micro-source with Non-linear Load with Power Electronic Technology." In Advances in Mechanical and Electronic Engineering, 639–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31516-9_103.

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Brock, Stefan, Dominik Łuczak, Tomasz Pajchrowski, and Krzysztof Zawirski. "Selected Methods for a Robust Control of Direct Drive with a Multi-mass Mechanical Load." In Advanced Control of Electrical Drives and Power Electronic Converters, 75–98. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45735-2_4.

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Popescu, Mihaela, Cristina Alexandra Pătraşcu, and Mircea Dobriceanu. "Application of Generalized Instantaneous Reactive/ Non-active Power Theories in the Control of Shunt Active Power Line Conditioners: Practical Evaluation under Nonideal Voltage and Unbalanced Load." In Nonlinear Dynamics of Electronic Systems, 125–33. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08672-9_16.

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Rossi, Mattia, Nicola Toscani, Marco Mauri, and Francesco Castelli Dezza. "Voltage Control of an RLC load." In Introduction to Microcontroller Programming for Power Electronics Control Applications, 299–330. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003196938-18.

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Rossi, Mattia, Nicola Toscani, Marco Mauri, and Francesco Castelli Dezza. "Current Control of an RL Load." In Introduction to Microcontroller Programming for Power Electronics Control Applications, 273–98. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003196938-17.

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Ruan, Xinbo, Wu Chen, Tianzhi Fang, Kai Zhuang, Tao Zhang, and Hong Yan. "Input Voltage Sharing Control Strategy for ISOP Systems Under Extreme Load Conditions." In CPSS Power Electronics Series, 191–208. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2760-5_9.

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Rossi, Mattia, Nicola Toscani, Marco Mauri, and Francesco Castelli Dezza. "Design Example: PI-Based Current Control of an RL Load." In Introduction to Microcontroller Programming for Power Electronics Control Applications, 67–86. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003196938-6.

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"Research and application of online grid load monitoring and smart analysis system." In Electric, Electronic and Control Engineering, 361–70. CRC Press, 2015. http://dx.doi.org/10.1201/b18611-64.

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Wang, Yulong, Peng Li, Kai Zhang, and Weiping Zhu. "Short-term load forecasting of power system based on wavelet analysis improved neural network model." In Electric, Electronic and Control Engineering, 775–80. CRC Press, 2015. http://dx.doi.org/10.1201/b18611-138.

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Тези доповідей конференцій з теми "Electronic load control"

Jayaraman, Ganga P., and Stephen V. Lunzman. "Modeling and analysis of an electronic load sensing pump." In Control (MSC). IEEE, 2011. http://dx.doi.org/10.1109/cca.2011.6044497.

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Jeong, In Wha, Mikhail Slepchenkov, Keyue Smedley, and Franco Maddaleno. "Regenerative AC Electronic Load with One-Cycle Control." In 2010 IEEE Applied Power Electronics Conference and Exposition - APEC 2010. IEEE, 2010. http://dx.doi.org/10.1109/apec.2010.5433354.

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Akhlaghi, Sadegh, and MohammadReza Zolghadri. "Predictive Current Control for Programmable Electronic AC Load." In 2020 11th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC). IEEE, 2020. http://dx.doi.org/10.1109/pedstc49159.2020.9088471.

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Song, Pengxian, Wenyan Qi, Haoming Wang, Zhengzheng Meng, Xu Li, and Mingzheng Zhu. "A Novel Power Electronic Load Simulation Method." In 2017 International Conference on Mechanical, Electronic, Control and Automation Engineering (MECAE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/mecae-17.2017.81.

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Li, Chunlong, Songhua Shen, Miao Guan, Jialin Lu, and Jianrong Zhang. "A Delay-compensated Deadbeat Current Controller for AC Electronic Load." In 2006 Chinese Control Conference. IEEE, 2006. http://dx.doi.org/10.1109/chicc.2006.280899.

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Xiaoxi, Wu, Liang Lin, Li Fen, and Zou Yunping. "Design of Single-phase AC Power Electronic Load." In 2010 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.1466.

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Huang Zhaoxia and Zou Yunping. "Design and analysis on the Power Electronic Load." In 2009 IEEE 6th International Power Electronics and Motion Control Conference. IEEE, 2009. http://dx.doi.org/10.1109/ipemc.2009.5157855.

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Xu She, Yun She, Chengzhi Wang, Jian Tang, Fen Li, and Yunping Zou. "Unified power electronic load for burn-in test." In 2009 IEEE 6th International Power Electronics and Motion Control Conference. IEEE, 2009. http://dx.doi.org/10.1109/ipemc.2009.5157686.

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Gyawali, Netra Pd. "Universal electronic load controller for microhydro power plant." In 2016 12th IEEE International Conference on Control and Automation (ICCA). IEEE, 2016. http://dx.doi.org/10.1109/icca.2016.7505291.

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Geng, Zhi, Dazhong Gu, Tianqi Hong, Jiaxin Teng, and Dariusz Czarkowski. "Novel control architecture for programmable electronic AC load to achieve harmonic load profiles." In 2017 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2017. http://dx.doi.org/10.1109/apec.2017.7931107.

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Звіти організацій з теми "Electronic load control"

Milyukhin, R. V. The control program of an electronic load simulator. OFERNIO, December 2017. http://dx.doi.org/10.12731/ofernio.2017.23434.

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Abdula, Andrii I., Halyna A. Baluta, Nadiia P. Kozachenko, and Darja A. Kassim. Peculiarities of using of the Moodle test tools in philosophy teaching. [б. в.], July 2020. http://dx.doi.org/10.31812/123456789/3867.

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The paper considers the role of philosophy and philosophical disciplines as the means of forming general cultural competences, in particular, in the development of critical thinking. The article emphasizes that the process of forming over-subject and soft skills, which, as a rule, include also critical thinking, gets much more complicated under the conditions of the reduction in the volume of philosophical courses. The paper grounds that one of the ways to “return” philosophy to educational programmes can be the implementation of training, using the e-learning environment, especially Moodle. In addition, authors point to the expediency of using this system and, in general, e-learning as an instrument for collaborating students to the world’s educational community and for developing their lifelong learning skills. The article specifies the features of providing electronic support in philosophy teaching, to which the following belongs: the difficulty of parametrizing the learning outcomes; plurality of approaches; communicative philosophy. The paper highlights the types of activities that can be implemented by tools of Moodle. The use of the following Moodle test tasks is considered as an example: test control in the flipped class, control of work with primary sources, control of self-study, test implementation of interim thematic control. The authors conclude that the Moodle system can be used as a tools of online support for the philosophy course, but it is impossible to transfer to the virtual space all the study of this discipline, because it has a significant worldview load. Forms of training, directly related to communication, are integral part of the methodology of teaching philosophy as philosophy itself is discursive, dialogical, communicative and pluralistic. Nevertheless, taking into account features of the discipline, it is possible to provide not only the evaluation function of the test control, but also to realize a number of educational functions: updating the basic knowledge, memorization, activating the cognitive interest, developing the ability to reason and the simpler ones but not less important, – the skill of getting information and familiarization with it.

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Litaor, Iggy, James Ippolito, Iris Zohar, and Michael Massey. Phosphorus capture recycling and utilization for sustainable agriculture using Al/organic composite water treatment residuals. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600037.bard.

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Objectives: 1) develop a thorough understanding of the sorption mechanisms of Pi and Po onto the Al/O- WTR; 2) determine the breakthrough range of the composite Al/O-WTR during P capturing from agro- wastewaters; and 3) critically evaluate the performance of the composite Al/O-WTR as a fertilizer using selected plants grown in lysimeters and test-field studies. Instead of lysimeters we used pots (Israel) and one- liter cone-tainers (USA). We conducted one field study but in spite of major pretreatments the soils still exhibited high enough P from previous experiments so no differences between control and P additions were noticeable. Due to time constrains the field study was discontinued. Background: Phosphorous, a non-renewable resource, has been applied extensively in fields to increase crop yield, yet consequently has increased the potential of waterway eutrophication. Our proposal impetus is the need to develop an innovative method of P capturing, recycling and reuse that will sustain agricultural productivity while concurrently reducing the level of P discharge from and to agricultural settings. Major Conclusions & Achievements: An innovative approach was developed for P removal from soil leachate, dairy wastewater (Israel), and swine effluents (USA) using Al-based water treatment residuals (Al- WTR) to create an organic-Al-WTR composite (Al/O-WTR), potentially capable of serving as a P fertilizer source. The Al-WTR removed 95% inorganic-P, 80% to 99.9% organic P, and over 60% dissolved organic carbon from the agro-industrial waste streams. Organic C accumulation on particles surfaces possibly enhanced weak P bonding and facilitated P desorption. Analysis by scanning electron microscope (SEM- EDS), indicated that P was sparsely sorbed on both calcic and Al (hydr)oxide surfaces. Sorption of P onto WW-Al/O-WTR was reversible due to weak Ca-P and Al-P bonds induced by the slight alkaline nature and in the presence of organic moieties. Synchrotron-based microfocused X-ray fluorescence (micro-XRF) spectrometry, bulk P K-edge X-ray absorption near edge structure spectroscopy (XANES), and P K-edge micro-XANES spectroscopy indicated that adsorption was the primary P retention mechanism in the Al- WTR materials. However, distinct apatite- or octocalciumphosphatelike P grains were also observed. Synchrotron micro-XRF mapping further suggested that exposure of the aggregate exteriors to wastewater caused P to diffuse into the porous Al-WTR aggregates. Organic P species were not explicitly identified via P K-edge XANES despite high organic matter content, suggesting that organic P may have been predominantly associated with mineral surfaces. In screen houses experiments (Israel) we showed that the highest additions of Al/O-WTR (5 and 7 g kg⁻¹) produced the highest lettuce (Lactuca sativa L. var. longifolial) yield. Lettuce yield and P concentration were similar across treatments, indicating that Al/O- WTR can provide sufficient P to perform similarly to common fertilizers. A greenhouse study (USA) was utilized to compare increasing rates of swine wastewater derived Al/O-WTR and inorganic P fertilizer (both applied at 33.6, 67.3, and 134.5 kg P₂O₅ ha⁻¹) to supply plant-available P to spring wheat (TriticumaestivumL.) in either sandy loam or sandy clay loam soil. Spring wheat straw and grain P uptake were comparable across all treatments in the sandy loam, while Al/O-WTR application to the sandy clay loam reduced straw and grain P uptake. The Al/O-WTR did not affect soil organic P concentrations, but did increase phosphatase activity in both soils; this suggests that Al/O-WTR application stimulated microorganisms and enhance the extent to which microbial communities can mineralize Al/O-WTR-bound organic P. Implications: Overall, results suggest that creating a new P fertilizer from Al-WTR and agro-industrial waste sources may be a feasible alternative to mining inorganic P fertilizer sources, while protecting the environment from unnecessary waste disposal.

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