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Environmental Engineering

2006

SelectedWorks

Articles 1 - 14 of 14

Full-Text Articles in Engineering

Towards A New Taxation System For Motor Vehicles, Theodoros Zachariadis Nov 2006

Towards A New Taxation System For Motor Vehicles, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.

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Analiza Możliwości Ograniczenia Emisji Zanieczyszczeń Powietrza Z Instalacji Spalania Odpadów Medycznych W Tarnowie, Robert Oleniacz Oct 2006

Analiza Możliwości Ograniczenia Emisji Zanieczyszczeń Powietrza Z Instalacji Spalania Odpadów Medycznych W Tarnowie, Robert Oleniacz

Robert Oleniacz

The paper presents initial research of effects of some factors on the amount of gaseous pollutants formation during medical waste incineration in a two-stage starved air fluidised bed reactor. In the research was included the impact of such factors as oxygen contents in flue gases, frequency of waste loading, momentary mass flow of waste and temperature in the secondary combustion chambers. Measurements showed that the waste incineration in large amount periodically caused excessive emissions incomplete combustion products (CO, HC), especially during wrong operation of the combustion system. The work demonstrated that the essential importance for CO and HC formation reducing …

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Economic And Energy Aspects Of Motor Vehicle Taxation, Theodoros Zachariadis, Nadia Nicolaidou Mar 2006

Economic And Energy Aspects Of Motor Vehicle Taxation, Theodoros Zachariadis, Nadia Nicolaidou

Theodoros Zachariadis

No abstract provided.

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Real-Time Measurement Of The Size Of Air Particulates, Marek Bogacki, Robert Oleniacz, Marian Mazur, Stanisław Kamiński Jan 2006

Real-Time Measurement Of The Size Of Air Particulates, Marek Bogacki, Robert Oleniacz, Marian Mazur, Stanisław Kamiński

Robert Oleniacz

The gravimetric method of measuring PM10 particulate concentration in air is the reference method used in Poland and in the European Union. To get information on mass fractions of lower diameter particulates (e.g. PM5, PM2,5 or PM1) one usually has to apply various pre-sorters (most often of the impact type). This paper presents a new device that measures air particulate sizes in real time. The device makes it possible to classify (sort) air particulates according to size into 256 granularity classes from about 0.4 µm up to 300 µm. Tests of a device prototype were conducted in Warsaw at the …

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Emisja Zanieczyszczeń Z Procesu Grafityzacji Elektrod Węglowych W Piecach Lwg (Castnera). Cz. 2. Wybrane Substancje Pyłowe, Marian Mazur, Robert Oleniacz, Marek Bogacki, Przemysław Szczygłowski Jan 2006

Emisja Zanieczyszczeń Z Procesu Grafityzacji Elektrod Węglowych W Piecach Lwg (Castnera). Cz. 2. Wybrane Substancje Pyłowe, Marian Mazur, Robert Oleniacz, Marek Bogacki, Przemysław Szczygłowski

Robert Oleniacz

The measurement results of quantity of dust pollutants originated and emitted to air from LWG (Castner) furnaces during graphitisation process of coal electrodes were presented in the paper. The investigation was carried out for total dust, total tar substances and polycyclic aromatic hydrocarbons (PAHs). The measurements were performed both before and after the flue gas control system (catalytic burning and wet cleaning). Thus changes of the substance concentrations in the gases for the cleaning system were estimated. As a result of the investigation was conclusion that the graphite process of coal electrodes in LWG stoves is not a significant source …

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Emisja Zanieczyszczeń Z Pieca Achesona Do Grafityzacji Wyrobów Drobnych, Marian Mazur, Robert Oleniacz, Marek Bogacki, Przemysław Szczygłowski Jan 2006

Emisja Zanieczyszczeń Z Pieca Achesona Do Grafityzacji Wyrobów Drobnych, Marian Mazur, Robert Oleniacz, Marek Bogacki, Przemysław Szczygłowski

Robert Oleniacz

Research results of the air pollutant emissions from the graphitisation process of fine products in the Acheson electric resistance furnace (discharge capacity 5,5 Mg) were presented in the paper. Research was performed for two kinds of raw material inputs (based on petroleum coke and pitch coke). Approximately 40-hours measurement series were carried out for each material including mainly such substances like carbon monoxide, hydrocarbons, nitrogen oxides, sulphur dioxide, hydrogen sulphide, carbon disulphide, ammonia, benzene, toluene, xylenes, total dust, tar substances and polycyclic aromatic hydrocarbons. Both average and maximum concentrations and mass streams in the flue gases and average emission factors …

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Removal Of Methyl-Tert Butyl Ether From Water By A Pulsed Arc Electrohydraulic Discharge System, Danielle M. Angeloni, Sarah E. Dickson, Monica B. Emelko, J -S Chang Jan 2006

Removal Of Methyl-Tert Butyl Ether From Water By A Pulsed Arc Electrohydraulic Discharge System, Danielle M. Angeloni, Sarah E. Dickson, Monica B. Emelko, J -S Chang

Sarah E Dickson

The removal of methyl-tert-butyl ether (MTBE) from water by a pulsed arc electrohydraulic discharge (PAED) system was investigated experimentally at the laboratory scale. The effects of arc electrode gap, detention time and initial solution pH on the efficacy of MTBE treatment by PAED were investigated. A 0.3 kJ/pulse spark-gap-type power supply was employed in combination with a 3.0 L flow-through reactor. Experimental results showed that: 1) oxidation reactions are induced by this PAED system; 2) removal efficiency increases with increasing cumulative input energy (kW·h/m3 or kJ/L); 3) removal efficiency decreases with increasing arc electrode gap; and 4) initial solution pH …

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Pulsed Electrohydraulic Discharge Characteristics In An Eccentric Electrode Cylindrical Reactor With Pbs, A Yamataki, D M. Angeloni, Sarah E. Dickson, Monica B. Emelko, K Yasuoka, J -S Chang Jan 2006

Pulsed Electrohydraulic Discharge Characteristics In An Eccentric Electrode Cylindrical Reactor With Pbs, A Yamataki, D M. Angeloni, Sarah E. Dickson, Monica B. Emelko, K Yasuoka, J -S Chang

Sarah E Dickson

Pulsed arc electrohydroulic discharge (PAED) has been proposed as a water treatment technology for the removal of chemical and microbial contaminants. In this work, we examined the fundamental characteristics of a PAED system with an eccentric electrode cylindrical reactor. Phosphate-buffered saline (PBS) water was used in lieu of tap water, because the conductivity of PBS is much higher than that of tap water. The results show that the voltage and current waveforms generated in PBS and tap water are very different due to the higher conductivity of PBS. Strong pressure waves and UV emission were also observed in PBS.

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Decision Support System For Rural Water Supply In The Nilgris District Of South India, Daniel Olsen, Sarah E. Dickson, Brian Baetz Jan 2006

Decision Support System For Rural Water Supply In The Nilgris District Of South India, Daniel Olsen, Sarah E. Dickson, Brian Baetz

Sarah E Dickson

A considerable amount of knowledge exists for planning, designing, and implementing rural water supply schemes in developing countries around the world. Generalized decision support systems (DSSs) are used to tackle the daunting task of providing water in areas that have poor water resources and limited financial capacity. However, there is a lack of site-specific DSSs that utilise local hydrological and socio-economic data for assessing regionally-based rural water supply schemes. In the Nilgiris District of South India, an organizational structure exists for improving local water resources through watershed management projects, but many of the tools used to make informed decisions are …

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A Novel Amendment Delivery System, Erica Ryter Jan 2006

A Novel Amendment Delivery System, Erica Ryter

Sarah E Dickson

No abstract provided.

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Forest Fires In Portugal: How They Happen And Why They Happen, João F. Gomes Jan 2006

Forest Fires In Portugal: How They Happen And Why They Happen, João F. Gomes

João F Gomes

Forest fires are recurrent phenomena in Southern European countries, due to the nature of Mediterranean forest and climatic characteristics. However, in Portugal, in the last years, forest fires attained the dimension of public calamity and are now endangering sustainability of forest itself, as well as several derived economic activities. This paper reviews the past and current situation of forest fires in Portugal, analyses its main causes and consequences and derives recommendations to effectively overcome this problem.

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Leaching Of Heavy Metals From Steelmaking Slags, João F. Gomes Jan 2006

Leaching Of Heavy Metals From Steelmaking Slags, João F. Gomes

João F Gomes

Leaching tests with EAF and Ladle slags were performed, using a flow through test and the standard batch test DIN 38414-S4. The previous method was used to simulate the leaching behaviour of steel slags under landfill. The chemical analysis of the leachates during this period shows, in general, for both types of slag, an increase of heavy metal releases with ageing. Standard test method DIN 38414-S4 was used to evaluate leachability of heavy metals by water in unprocessed slags. After more than one year of trials, slag samples submitted to these trials presented very low total leaching levels. The most …

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Estimation Of Uncertainty In The Determination Of Nitrogen Oxides Emissions, João F. Gomes Jan 2006

Estimation Of Uncertainty In The Determination Of Nitrogen Oxides Emissions, João F. Gomes

João F Gomes

This paper presents a methodology for estimation of uncertainty on a reference test method for determination of nitrogen oxides concentration in gaseous emissions from stationary sources. As a first stage for identification of uncertainty sources, the test method is carefully reviewed in detail. Afterwards, these sources are quantified, bearing in mind its partial uncertainty, allowing the determination of the combined uncertainty and, finally, the expanded uncertainty. The calculation procedure was implemented into an excel calculation file. Using this file and considering several numerical applications from real situations, uncertainities around 15 mg/Nm3 over determined concentrations of 350 mg/Nm3 of NOx (expressed …

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Fume Emissions During Metal Arc Welding, João F. Gomes Jan 2006

Fume Emissions During Metal Arc Welding, João F. Gomes

João F Gomes

No abstract provided.

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