In the context of circular economy,it is known that once waste is generated,it should be subject to proper treatment for recovering material or energy before being *** countries worldwide,especially developing countri...
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In the context of circular economy,it is known that once waste is generated,it should be subject to proper treatment for recovering material or energy before being *** countries worldwide,especially developing countries such as Brazil,have been struggling to effectively apply sustainable waste management in municipalities and still rely on dumpsites and unsuitable ***,a weak legal framework,lack of financial resources and poor infra-structure as well as pressure from organizations profiting from the expansion of landfills are some factors contributing to the preservation of the negative status quo:the“landfill culture”.Material recovery,i.e.,recycling and composting,is applied to less than 5%of Brazilian municipal waste,while 95%is disposed of in landfills or *** this context,ABREN wtert(waste-to-energy research and technology council)Brazil was created in 2019 as the first permanent organization formed to promote the development of energy and material recovery from waste focused on the waste-to-energy(WTE)*** this paper,the strategy proposed and implemented by the organization towards changing the status quo in Brazil through an integrated sustainable waste management approach is *** proposed strategy integrates the concepts of Sustainability and Circular Economy for minimizing landfill disposal(avoiding methane emissions)and maximizing material/energy *** others,the approach focuses on changing the public opinion regarding thermal treatment facilities,mainly incinerators,which has been wrongly linked to pollution,excessive public expenditures and considered a harm to the recycling *** activities performed by ABREN include engaging public and private institutions,enhancing education,leading the publication of research and business studies,gathering industry members and academy experts,as well as creating strategic alliances with players around the *** a result,within a few years,major
Control valves are widely used in industry to control fluid flow in several applications. In nuclear power systems they are crucial for the safe operation of plants. Therefore, the necessity of improvements in monitor...
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Control valves are widely used in industry to control fluid flow in several applications. In nuclear power systems they are crucial for the safe operation of plants. Therefore, the necessity of improvements in monitoring and diagnosis methods started to be of extreme relevance, establishing as main goal of the reliability and readiness of the system components. The main focus of this work is to study the development of a model of non-intrusive monitoring and diagnosis applied to process control valves using artificial intelligence by fuzzy logic technique, contributing to the development of predictive methodologies identifying faults in incipient state. Specially in nuclear power plants, the predictive maintenance contributes to the security factor in order to diagnose in advance the occurrence of a possible failure, preventing severs situations. The control valve analyzed belongs to a steam plant which simulates the secondary circuit of a PWR—Pressurized Water Reactor. The maintenance programs are being implemented based on the ability to diagnose modes of degradation and to take measures to prevent incipient failures, improving plant reliability and reducing maintenance costs. The approach described in this paper represents an alternative departure from the conventional qualitative techniques of system analysis. The methodology used in this project is based on signatures analysis, considering the pressure (psi) in the actuator and the stem displacement (mm) of the valve. Once the measurements baseline of the control valve is taken, it is possible to detect long-term deviations during valve lifetime, detecting in advance valve failures. This study makes use of MATLAB language through the “fuzzy logic toolbox” which uses the method of inference “Mamdani”, acting by fuzzy conjunction, through Triangular Norms (t-norm) and Triangular Conorms (t-conorm). The main goal is to obtain more detailed information contained in the measured data, correlating them to failure sit
Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment *** current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions,with or wi...
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Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment *** current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions,with or without addition of acid *** pretreatments modify biomass chemistry and morphology,particularly at the *** this work,we use X-ray diffraction,dynamic vapor sorption and calorimetric thermoporometry to investigate the biomass nanostructural changes promoted by hydrothermal *** compare and differentiate the rind and pith fractions of sugarcane stalks in order to contribute to the understanding of rind-pith contrasting ***,for both cane fractions our results point consistently to cellulose co-crystallization,lignin aggregation,and opening of nanoscale pores as the main nanostructural phenomena occurring during hydrothermal treatments.
The detection of the pharmaceutical compounds used in human and veterinary medicine is in several environmental matrices (surface waters, effluents, groundwater, soils, and sediments), and such presence promotes the r...
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The detection of the pharmaceutical compounds used in human and veterinary medicine is in several environmental matrices (surface waters, effluents, groundwater, soils, and sediments), and such presence promotes the resistance bacteria development, making them ineffective in some diseases treatment. The research project promotes the TiO2 synthesis using yeast culture as biotemplate, the step followed by the microstructure characterization with surface area enhancement;such properties are responsible for the improvement of solar photodecomposition processes of the veterinary antibiotic oxytetracycline. In such simple and standard process conditions the system reaches about 84% of removal percentage with a better agreement with the pseudo-first-order with the Pearson coefficient in the range from 0.82 to 0.94 and K1 = 0.035 M−1∙s−1. The degradation rate constant increased with the increasing initial Yeast-TiO2 dosage until the maximum mass of 0.1 g or with the decreasing of initial oxytetracycline concentration. The solar light used as a sustainable irradiation source is abundant and low cost in tropical countries, perfect to be applied in water treatment to decompose the pharmaceuticals pollutants, as the veterinarian antibiotics. The study demonstrates that solar photodecomposition is an efficient treatment technology for the removal of antibiotics from polluted water and provides insightful information on the potential practical application of this technology to treat contaminated water, possibly also in rural, distant areas.
Fully printed perovskite solar cells(PSCs)were fabricated in air with all constituent layers,except for electrodes,deposited by the blade coating *** PSCs incorporated,for the first time,a nanometer-thick printed bath...
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Fully printed perovskite solar cells(PSCs)were fabricated in air with all constituent layers,except for electrodes,deposited by the blade coating *** PSCs incorporated,for the first time,a nanometer-thick printed bathocuproine(BCP)hole blocking buffer using blade coating and deposited at relative humidity up to 50%.The PSCs with a p-i-n structure(glass/indium tin oxide(ITO)/poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS)/CH_(3)NH_(3)Pbl_(3)/[6,6]-phenyl-C_(61)-butyric acid methyl ester(PCBM)/BCP/Ag)delivered a maximum power conversion efficiency(PCE)of 14.9%on an active area of 0.5 cm^(2)when measured under standard test *** PSCs with a blade coated BCP delivered performance of 10%and 63%higher(in relative terms)than those incorporating a spin coated BCP or without any BCP film,*** atomic force microscopy(AFM)showed that blade coated films were more homogeneous and acted also as a surface planarizer leading to a reduction of roughness which improved BCP/Ag interface lowering charge *** demonstration of 15%efficient devices with all constituent layers,including nanometer-thick BCP(〜10 nm),deposited by blade coating in air,demonstrates a route for industrialization of this technology.
We propose a new exponential shape function in wormhole geometry within modified *** energy conditions and the equation-of-state parameter are *** radial and tangential null energy conditions,and also the weak energy ...
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We propose a new exponential shape function in wormhole geometry within modified *** energy conditions and the equation-of-state parameter are *** radial and tangential null energy conditions,and also the weak energy condition are validated,which indicates the absence of exotic matter due to modified gravity allied with such a new proposal.
Purpose The Large High Altitude Air Shower Observatory(LHAASO)is a hybrid extensive air shower(EAS)*** consists of 3 types of detector arrays and about 9500 detector units in *** information generated by data acquisit...
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Purpose The Large High Altitude Air Shower Observatory(LHAASO)is a hybrid extensive air shower(EAS)*** consists of 3 types of detector arrays and about 9500 detector units in *** information generated by data acquisition system(DAQ),including signal count rates of detectors,is stored temporarily in Redis and updated *** is an open-source in-memory *** control interface of DAQ's data flow software is also based on *** to the monitoring and control requirements,status data from DAQ system need to be *** status of data flow software and detectors should be *** automatic operation mode,common software and hardware faults should be detected and recovered *** Status information collection,analysis and automatic operation control are implemented in multiple *** information collection programs collect the operation status data from the DAQ and monitor the operation status of the computing *** information is cached in *** is an open-source distributed event streaming *** DAQ data flow controller program obtains the status data from Kafka,analyzes the operation status,and tries to recover the fault by modifying the DAQ configuration file and restarting *** this architecture,the automatic control logic can be easily updated by modifying and restarting a single ***,the monitoring data are structured and stored in *** and Conclusions The software can monitor the detectors,electronics and computing nodes in LHAASO,save monitoring data in MongoDB,and control the DAQ data flow *** a fault occurs,it can restart the DAQ data flow *** software meets the auto-control operation requirements of LHAASO.
In addition to the efforts undertaken by research institutions to generate new knowledge and technologies, it is also necessary to promote the results of this research. Specifically, there is a need for an information...
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In addition to the efforts undertaken by research institutions to generate new knowledge and technologies, it is also necessary to promote the results of this research. Specifically, there is a need for an information system that aggregates, organizes and systematizes information about agro-energy technology and makes it available on the Internet. Despite the abundance of information circulating on the internet in Brazil, a specific method for sharing valid scientific and technological information of practical interest, such as technical guidance and recommendations for processing various materials and production technologies for various forms of agro-energy, has not yet been established. This article presents the Agro-energy Tree of Knowledge, a tool developed by Embrapa to enable web access to comprehensive information about bioenergy production systems applied in different regions and conditions, in addition to texts, publications, statistical data about production and economic markets and information links related to agro-energy.
Owing to the rapid development of microgrids(MGs)and growing applications of renewable energy resources,multiobjective optimal dispatch of MGs need to be studied in *** this study,a multiobjective optimal dispatch mod...
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Owing to the rapid development of microgrids(MGs)and growing applications of renewable energy resources,multiobjective optimal dispatch of MGs need to be studied in *** this study,a multiobjective optimal dispatch model is developed for a standalone MG composed of wind turbines,photovoltaics,diesel engine unit,load,and battery energy storage *** economic cost,environmental concerns,and power supply consistency are expressed via subobjectives with varying ***,the analytic hierarchy process algorithm is employed to reasonably specify the weight coefficients of the *** quantum particle swarm optimization algorithm is thereafter employed as a solution to achieve optimal dispatch of the ***,the validity of the proposed model and solution methodology are con firmed by case *** study provides refere nee for mathematical model of multiojective optimizati on of MG and can be widely used in current research field.
The work presents technologies of materials,energy and water management that can be used for sustainable buildings,reducing costs and environmental *** aim was to encourage the reduction of energy consumption,adequate...
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The work presents technologies of materials,energy and water management that can be used for sustainable buildings,reducing costs and environmental *** aim was to encourage the reduction of energy consumption,adequate water management and more sustainable material choices in new or existing *** this,a diagnosis of existing technologies and alternatives was carried out in the first stage of the *** second stage consisted of analyzing among the technologies and alternatives diagnosed from the methodology which can be applied in a fictitious case study of housing,its implementation and maintenance and viability analyzing,finally,environmental indicators,social and *** results showed that the best evaluated technologies/alternatives were in energy:ventilation and natural light;in Water Management:double-action sanitary basin,flow restrictors,aerators with constant flow,and minicistern systems;and in Materials:bamboo,wood,soil-cement brick,earth,steel frame and wood frame,aggregate with ash from rice husks,aggregate with ash from sugarcane bagasse,glass,phase change materials,aggregate with residues of construction and demolition,Portland cement and cement with blast furnace slag;which can be used in the civil construction sector,and provide socio-environmental and economic benefits,encouraging new studies and its use for public/private buildings,aid in the elaboration of public policies to reduce costs and improve the quality of buildings.
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