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Ecology of testate amoebae (Protists) in a Sphagnum-dominated peat bog and the relationship between species assemblages and environmental parameters

Niedźwiecki M., Mieczan T., Adamczuk M.

Oceanological and Hydrobiological Studies

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2016

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Vol. 45, No. 3

344--352

EN

Despite its ecological importance, little information is available regarding spatial and seasonal changes in the testate amoebae community in peat bogs. The objectives of this study were to examine the structure of communities and horizontal distribution of testate amoebae fauna, to improve the understanding of factors affecting the distribution of moss testate amoebae communities and to analyze the seasonal changes in testate amoebae communities in a Sphagnum-dominated peat bog (eastern Poland). A total of 45 testate amoebae species were identified in the samples. The highest species richness occurred in hollows dominated by Sphagnum angustifolium, much lower numbers of taxa were observed in hummocks dominated by Sphagnum magellanicum and Polytrichum. The Monte Carlo permutation test showed the significance of Ntot, temperature, pH, and the depth to the water table for the variability of testate amoebae in all microhabitats. Species found in spring samples were associated with the increased Ntot content. Species occurring in summer samples were associated with the increasing pH gradient and species developing in late spring and autumn preferred a greater depth to the water table.

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Crustacean communities as food resources for fish in shallow Polesie lakes with contrasting development of submerged macrophytes

Adamczuk M., Kornijów R.

Oceanological and Hydrobiological Studies

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2011

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Vol. 40, No.1

11-18

EN

The aim of the research was to evaluate crustacean forage resources for fish in five shallow lakes varied in respect to species richness and coverage of submerged macrophytes, and thus representing different alternative stable states. The results revealed that lakes with a high or moderate abundance of macrophytes and moderate visibility (macrophyte-dominated Lake Rotcze, phytoplankton-macrophyte dominated lakes Sumin and Głębokie) displayed reach crustacean forage base for fish. Poor feeding conditions were found in two extremely different lakes: turbid phytoplankton-dominated Lake Syczyńskie devoid of macrophytes, and heavily vegetated, clear-water macrophytedominated Lake Kleszczów. Possible reasons for these differences are discussed.

3

The Use of Computer Programs for the Numerical Modelling of Combustion Processes and Gas Dynamics in Heating Furnaces

Adamczuk M., Radomiak H.

Archivum Combustionis

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2010

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Vol. 30 nr 4

451-458

EN

In this day and age of computers and advanced computational techniques the analyzed process can be studied not only experimentally on material model in laboratory or exploitation process but also analytically on a mathematical model. In an analytic way we can study the influence of different parameters e.g. the temperature on the considered process for many different combinations of values. The computer simulations help and make it possible to carry out complex experiments and the scientific research, the analysis of phenomena difficult to observe or impossible to realize in normal conditions. This article presents possibilities for the numerical modelling of combustion processes and gas dynamics in heating furnaces. The chemistry of the combustion process was modelled using the software the newest version of CHEMKIN program, namely CHEMKIN-PRO CHEMKIN, while the flue gas flow dynamics in the combustion chamber was modelled with the COMSOL MULTHIPHISIC software.

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Aspekty środowiskowe w eksploatacji pieców hutniczych

Radomiak H., Adamczuk M.

Prace Naukowe Politechniki Warszawskiej. Konferencje

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2009

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z. 26

291-297

PL

Wytapianie stali z tworzyw zawierających żelazo, takich jak złom, jest zwykle wykonywane w elektrycznych piecach łukowych, które odgrywają coraz większą rolę w nowoczesnych hutach stali. Głównym materiałem wsadowym dla tych pieców jest złom żelazny. Po stopieniu stal odlewa się w sposób ciągły w profile według wymogów walcowni. Do walcowania na gorąco wsad stalowy musi być podgrzewany do odpowiedniej temperatury walcowania pomiędzy 1050 i 1300 °C. W zależności od materiału wsadowego i od procesu walcowania na gorąco, grzanie jest przeprowadzane w różnego rodzaju piecach takich jak piece przepychowe, piece pokroczne, piece z obrotowym trzonem i inne. Piece te są opalane gazem ziemnym lub gazami hutniczymi takimi jak gaz koksowniczy i gaz wielkopiecowy zmieszanymi w odpowiedniej proporcji. Zależnie od mediów grzejnych występują różne emisje gazów odlotowych.

EN

Melting steel from substances containing iron such as scrap is usually done in electric arc furnaces which are playing an increasing role in modern steel mills. The main charge material for these furnaces is iron scrap. Steel is cast continuously into sections after melting, according to the requirements of the rolling mill. For hot rolling steel charge must be heated to an appropriate rolling temperature between 1050 and 1300 °C. Depending on charge material and hot rolling process, heating is carried out in different types of furnaces such as pushing, walking beam, rotary kiln etc. These furnaces are fired by natural or metallurgical gases such as coke-oven gas and blastfurnace gas mixed in proper proportions. Depending on firing substance different emissions of smelter gases can occur.

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Zastosowanie metod numerycznych w ochronie powietrza atmosferycznego

Adamczuk M., Szecówka L., Radomiak H.

Archiwum Spalania

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2009

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Vol. 9, nr 1-2

13-23

PL

Degradacja środowiska naturalnego wymusza potrzeby wprowadzania rygorystycznych norm w zakresie jego ochrony, a co za tym idzie podejmowania działań zmierzających do ograniczenia emisji szkodliwych zanieczyszczeń. Pierwotne metody redukcji należą obecnie do najtańszych metod ograniczania zanieczyszczeń gazowych, a poprzez odpowiednie przygotowanie paliw stałych również i pyłowych. Najczęściej stosowaną w warunkach polskich pierwotną metodą redukcji emisji tlenków azotu jest stopniowanie powietrza. Z przeprowadzonych na światową skalę eksperymentów wynika, że stopniowanie paliwa to obok stopniowania powietrza jedna z najskuteczniejszych pierwotnych metod redukcji tlenków azotu, która umożliwia współspalanie tradycyjnych paliw energetycznych z paliwami odpadowymi i biopaliwami. Już od kilku lat w Katedrze Pieców Przemysłowych i Ochrony Środowiska Politechniki Częstochowskiej prowadzone są badania, zarówno modelowe, jak i eksperymentalne nad możliwością ograniczania metodami pierwotnymi emisji zanieczyszczeń gazowych, zwłaszcza tlenków azotu, powstających w procesach spalania.

EN

The degradation of the natural environment extorts need of introducing in range rigorous norms his protection, and what it for this goes the undertaking of working aiming to limitation emission of harmful pollution. The primary methods of pollution reduction are presently among the cheapest methods of reducing gaseous pollutants and, through the appropriate preparation of solid fuels, also dusty pollutants. A primary nitrogen oxide reduction method that is most frequently used in the Polish conditions is the air staging. Experiments carried out on a worldwide scale indicate that the fuel staging, alongside the air staging, is one of the most et1lcient primary nitrogen reduction methods, which enables the cocombustion of traditional energy fuels with waste fuels and biofuels. Both model and experimental studies have been conducted for several years at the Department of Industrial Furnaces and Environmental Protection of the Czestochowa University of Technology on the possibility of reducing the emissions of gaseous pollutants, in particular nitrogen oxides forming in combustion processes, by primary methods.