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wyświetlamy 1000 najlepszych wyników Pomoc
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Cinnamon as a Useful Preventive Substance for the Care of Human and Plant Health
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Antimicrobial resistance of fecal indicators in muncipal wastewater treatment plant
PublikacjaAntimicrobial resistance of fecal coliforms (n = 153) and enterococci (n = 199) isolates was investigated in municipal wastewater treatment plant (WWTP) based on activated sludge system. The number of fecal indicators (in influent and effluent as well as in the aeration chamber and in return activated sludge mixture) was determined using selective media. Susceptibility of selected strains was tested against 19 (aminoglycosides,...
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Pilot- scale plant for material recycling of whole waste tires
PublikacjaContinously growing demad for all kinds of vehicles and general tendency to regular exchange of tires are causing growth of scrap tires which need management. A risings of large quantities of used rubber products, especially used tires has been increasing every year in Poland, in 2006 it was 160 thousand. The waste management and recycling of used tires become a major environmental problem. It is worth noticing that tires which...
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Landfill leachate treatment at a pilot plant using hydrophyte systems
PublikacjaConstructed wetlands can provide an effective and economical solution to landfill leachate treatment. In the article the performance of a CW for leachate treatment, consisting of two horizontal flow constructed wetlands (HF-CW) beds, working at the municipal landfill in Gdansk-Szadolki in the period 2004-2005 is being discussed. The plant has been operating since 2001. Clogging problems and surface flow occurred in the system...
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Environmental risk assessment of Polish wastewater treatment plant activity
PublikacjaWastewater treatment plants (WWTPs) play an extremely important role in shaping modern society's environmental wellbeing and awareness, however only well operated and supervised systems can be considered as environmentally sustainable. For this reason, an attempt was undertaken to assess the environmental burden posed by WWTPs in major Polish cities by collecting water samples prior to and just after wastewater release points....
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An Impact of Environmental Disturbances on Combined Cycle Power Plant Control
PublikacjaCombined cycle power plants operate at thermal efficiency approaching 60 percent. In the same time their performance presents several problems that have to be addressed. E.g. gas turbines are very sensitive to backpressure exerted on them by the heat recovery steam generators as well as to ambient pressure and temperature.
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LEGAL ASPECTS OF ELECTRIC ENERGY GENERATION IN A FLOATING POWER PLANT
PublikacjaThis paper discusses the characteristics of pollution and legal regulations governing investment projects affecting the environment. It describes a combined system of a compression ignition engine and a steam turbine, whose aim, when placed on a floating platform, is to produce electric energy in a so-called distributed generation system. Such a system involves a reciprocating internal combustion engine and a connected steam turbine...
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Recent advances on the removal of phosphorus in aquatic plant-based systems
PublikacjaPhosphorus (P) is a vital nutrient for the ecosystems and its excess in wastewater streams leads to some environmental issues such as extensive algae growth (eutrophication). Phytoremediation is a green technology that is based on the combined actions of plants and their associated microbial groups to remove and transfer the toxic compounds in surface water, groundwater and soil. Aquatic plants are widely used for the remediation...
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Bacteria in the area of influence of sewage tretment plant Gdynia - Dębogórze
Dane BadawczeThe dataset contains the results of microbiological analysis of sea waters from Gulf of Puck in area of municipal sewage discharges from the Gdynia Dębogórze sewage treatment plant. The tested material consisted of water samples (surface water and bottom water) collected in 2012. The number of Enterobacteriaceae genus bacteria, number of Escherichia...
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Effect of some properties of hydrocarbon fuels on self-ignition delay Wpływ wybranych właściwości paliw węglowodorowych na opóźnienie ich samozapłonu w silniku o zapłonie samoczynnym
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BMC PLANT BIOLOGY
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PLANT AND CELL PHYSIOLOGY
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TRENDS IN PLANT SCIENCE
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PCA application in assessment of fertilizer plant impact on different components of environment
PublikacjaW pracy podjęto próbę oceny wpływu Gdańskich Zakładów Nawozów Fosforowych "Fosfory" S.A. na najbliższe środowisko. W pracy przedstawiono wyniki świadczące o jakości różnych komponentów środowiska na terenie objętym wpływem zakładu. W pracy przedstawiono wyniki oznaczeń 44 pierwiastków w 46 próbkach gleb i traw pobieranych na terenie fabryki oraz w bezpośrednim sąsiedztwie. 37 z 44 oznaczonych pierwiastków użyto do wykonania analiz...
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Application of INAA in assesment of phosphatic fertilizer plant impact on the adjacent environment
PublikacjaW pracy przedstawiono wyniki badań przeprowadzonych na terenie GZNF "Fosfory" S.A. i wokół fabryki. Oznaczono szerokie spektrum pierwiastków w próbkach gleby, trawy, fosforytów, potrójnego superfosfatu, Amofoski i soli potasowej. Podjęto próbę oceny wpływu GZNF "Fosfory" na otaczające je środowisko. Badania przeprowadzono w ramach projektu UE "Fertilizers and Health" ICA2-CT-2000-10025, w którym brały udział: Holandia, Rosja, Uzbekistan,...
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Microbiological and biological aspects of wastewater tretment plant Wschód in Gdańsk Operation.
PublikacjaW pracy wykazano, iż w oczyszczalni Wschód w Gdańsku, pracującej w zmodyfikowanym systemie UCT, zanieczyszczenia bakteriologiczne ze ścieków są usuwane w granicach od 92% do ponad 99%, a zanieczyszczenia parazytologiczne niemal całkowicie. Pomimo tego odpływy są nadal dość znacznie zanieczyszczone bakteriologicznie o czym świadczy liczba bakterii wskaźnikowych oraz okresowa obecność bakterii z rodzaju Salmonella. Ustalono, iż...
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Fractionation and origin of dissolved and colloidal organic nitrogen in BNR plant effluent
PublikacjaThe characteristics of effluent dissolved and colloidal organic nitrogen (DON and CON) as well as their origin, fate and biodegradability in wastewater treatment plants and receiving waters were identified as the major issues that limit the ability to achieve low total N in the effluent. This study presents the results of a comprehensive survey, which was conducted in eight biological nutrient removal (BNR) WWTPs in northern Poland....
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Strength and Compressibility of Ammonia-Soda Residue from the Solvay Sodium Plant
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Partial characterization of indigo (Polygonum tinctorium Ait.) plant seeds and leaves
PublikacjaThe aim of this study was to assess the contents of indigo's bioactive compounds, its antioxidant and anticancer activities in acetone, hexane and DMSO extracts and to compare the overall bioactivity with another more used medicinal plant named prolipid. It was found that the contents of the bioactive compounds in the studied extracts from different parts of indigo plant varied (P < 0.05): the significantly highest content of polyphenols...
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Neural Networks in the Diagnostics Process of Low-Power Solar Plant Devices
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Effect of pesticides on microorganisms, enzymatic activity and plant in biochar-amended soil
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Possibility of use adsorption chillers for increase efficiency in conventional power plant
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Plant–soil interactions in soil organic carbon sequestration as a restoration tool
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Airborne peptidoglycans as a supporting indicator of bacterial contamination in a metal processing plant
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Hard tissue samples as markers of occupational exposure in phosphatic fertilizer plant
PublikacjaW pracy opisano zastosowanie próbek włosów i paznokci do oceny narażenia pracowników zakładów nawozów fosforowych na zanieczyszczenie metalami ciężkimi. Jako metodę oznaczania 25 pierwiastków we włosach i paznokciach zastosowano aktywacje neutronową. Do opracowania wyników i ich oceny zastosowano szereg metod chemometrycznych.
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Small Hydropower Plant With Integrated Turbine-Generators Working at Variable Speed
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Pilot plant studies on the removal of trihalomethanes by composite reverse osmosis membranes
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GENOMIC ANALYSIS OF PLANT-ASSOCIATED BACTERIA AND THEIR POTENTIAL IN ENHANCING PHYTOREMEDIATION EFFICIENCY
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Ragged Robin (Lychnis flos-cuculi) - a plant with potential medicinal value
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THERMODYNAMIC ANALYSIS OF A GENERATION IV SCWR NUCLEAR POWER PLANT CYCLE
PublikacjaThis article presents a flow and thermodynamic analysis of a Generation IV nuclear cycle. An SCWR (Supercritical water reactor) is a high temperature and high pressure reactor that uses water at a temperature above its thermodynamic critical point as the working fluid. The cycle used for the calculations consists of one interstage superheater and 7 regenerative heat exchangers. Division pressure was optimized in view of the cycle efficiency,...
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Selected Technical Requirements for Photovoltaic Plant Interconnection with a Medium Voltage Grid
PublikacjaThe article discusses some selected technical requirements, which according to these authors should be recognised and met by photovoltaic power plants connected to national distribution grids in the context of their likely development. This development today is limited, since Polish legislation has not implemented the relevant EU Directive [8]. The study points out the purposefulness of incorporating the necessary requirements...
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The role of the sawage treatment plant in the removal of genotoxic compounds from the environment
PublikacjaOne reason for increased incidence of various types of cancer are environmental pollutants particularly of anthropogenic origin. All human activities may pollute the environment, but some have significant impact, just to mention energy industry, mining, transportation, chemical and petrochemical industries and housing. Environmental pollutants are a large group of compounds in terms of their physicochemical properties, some of...
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Advanced Control Structures of Turbo Generator System of Nuclear Power Plant
PublikacjaIn the paper a synthesis of advanced control structures of turbine and synchronous generator for nuclear power plant working under changing operating conditions (supplied power level) is presented. It is based on the nonlinear models of the steam turbine and synchronous generator cooperating with the power system. Considered control structure consists of multi-regional fuzzy control systems with local linear controllers, including...
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DESIGN AND STRENGTH CALCULATIONS OF THE TRIPOD SUPPORT STRUCTURE FOR OFFSHORE POWER PLANT
PublikacjaThe support structure being the object of the analysis presented in the article is Tripod. According to the adopted assumptions, it is a foundation gravitationally set in the water region of 60 m in depth, not fixed to the seabed, which can be used for installing a 7MW wind turbine. Due to the lack of substantial information on designing and strength calculations of such types of structures in the world literature, authors have...
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Advanced Control Structures of Turbo Generator System of Nuclear Power Plant
PublikacjaIn the paper a synthesis of advanced control structures of turbine and synchronous generator for nuclear power plant working under changing operating conditions (supplied power level) is presented. It is based on the nonlinear models of the steam turbine and synchronous generator cooperating with the power system. Considered control structure consists of multi-regional fuzzy control systems with local linear controllers, including...
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Analysing selection of low-temperature medium for cogeneration micro power plant
PublikacjaThe article analyses the ORC system working with dry and wet low-boiling media which are most frequently used in installations of this type. Two types of cycles were examined, which were the cycle with heat regeneration for dry media: fc72, hfe7100, R227ea, R245fa, R423a and R600a, and the cycle without heat regeneration for wet media: R11, R12, R134a, R718 and 507a. The calculations were performed for the assumed required thermal...
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Simplified, multiregional fuzzy model of a nuclear power plant steam turbine
PublikacjaPower systems, including steam turbines and synchronous generators, are complex nonlinear systems with parameters varying over time. The paper presents the developed simplified, multiregional fuzzy model of the steam turbine of a nuclear power plant turbine generator set and compares the results with a full nonlinear model and commonly used linear input-output model of a steam turbine. The proposed model consist of series of linear...
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Aromatic heptaene antibiotics as an alternative for synthetic triazole fungicides in plant protection
PublikacjaAn in vitro antifungal activity of candicidin and ascosin antibiotics (0,01-10 μg/mL) towards representative strains of phytopathogenic fungi was detd. Both compds. exhibited similar half max. effective concns. inhibiting growth of the fungi as that of tebuconazole used for comparison.
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SORPTION OF SELECTED CHLORINATED SOLVENTS ON PLANT DEBRIS COLLECTED IN A CITY PARK
PublikacjaDebris from deciduous trees in the form of park green waste was investigated as a potential biosorbent for the removal of chlorinated solvents from water. The sorption properties of beech leaves and cupules, oak leaves and acorns, birch leaves and lime leaves (all tree species common for a moderate climate) in a non-modified form were investigated with regard to the removal of perchloroethylene, 1,1,2-trichloroethane and 1,1,1,2-tetrachlorothane....
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The influence of plant protection by effective microorganisms on the content of bioactive phytochemicals in apples
PublikacjaThe phytochemicals of two apple cultivars (Yellow Transparent and Early Geneva) protected in two ways, conventionally with chemical pesticides or by effective microorganisms (EM), were compared. Two types of components were determined: lipids synthesised constitutively and generated via inducible pathways polyphenols along with antioxidant activity and profiles. The antioxidant activities assessed with ABTS, DPPH and Folin–Ciocalteu...
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Remediation of soils on municipal rendering plant territories using Miscanthus × giganteus
PublikacjaPhytoremediation, as a cost-effective, highly efficient, environmentally friendly, and green approach, gained attention to the removal of metals, including heavy metals, from contaminated soils. The toxic nature of heavy metals can have an adverse effect on human health and the ecosystem, and their removal remains a worldwide problem. Therefore, in this study, a field experiment was carried out to evaluate the potential of Miscanthus × giganteus...
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Micropropagation of cyclopia genistoides, an endemic south african plant of economic importance
PublikacjaOpracowano efektywną procedurę hodowli tkankowej dla komercyjnie ważnej rośliny gatunku Cyclopia genistoides.
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Analysing selection of low-temperature medium for cogeneration micro power plant
PublikacjaThe article analyses the ORC system working with dry and wet low-boiling media which are most frequently used in installations of this type. Two types of cycles were examined, which were the cycle with heat regeneration for dry media: fc72, hfe7100, R227ea, R245fa, R423a and R600a, and the cycle without heat regeneration for wet media: R11, R12, R134a, R718 and 507a. The calculations were performed for the assumed required thermal...
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The Possibility to use a Nuclear Power Plant as a Source of Electrical Energy and Heat
PublikacjaIn this article issues concernig the possibility of nuclear power plant (NPP) operation also as a source of heat, which means combined heat and power production, have been described. CHP work is possible and profitable only in those areas where high thermal power demand occurs, which means near city agglomerations such as Warsaw or the Tri-City. Two levels of thermal power delivered to the heating system have been considered. Preliminary...
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ISSUES OF ECONOMIC ANALYSIS OF ELECTRIC ENERGY GENERATION IN A FLOATING POWER PLANT
PublikacjaThis article presents basic dependences for conducting a technical and economic analysis related with investment projects. It describes a combined system of a compression ignition engine and a steam turbine, whose aim, when placed on a floating platform, is to generate electric energy in the so-called distributed generation system. Such a system involves a reciprocating internal combustion engine and a connected steam turbine system...
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CURRENT OPINION IN PLANT BIOLOGY
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CANADIAN JOURNAL OF PLANT SCIENCE
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Bangladesh Journal of Plant Taxonomy
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Plant Breeding and Seed Science
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Invasive Plant Science and Management
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