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Wyświetlanie 1-5 z 5
Tytuł:
Reintegracja zdegradowanych sieci wodnych w mieście
The Reintegration of Degraded Aquatic Network in the City
Autorzy:
Rybka, A.
Kozłowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/1818061.pdf
Data publikacji:
2016
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
reintegracja
woda w mieście
uszczelnianie miasta
reintegration
water in the city
sealing the city
Opis:
The article examines the presence of water in the city. It confronts its existence with the notion of threat, but also natural capital. It also outlines the relationship of cities with water from the antiquity until present. The issue of the reintegration of degraded water channels in urban areas is dealt with as well. Rapidly progressive anthropogenic processes, mainly occurring at the turn of the 19th and 20th centuries, associated with industrialisation and rapid urbanisation have led to the deep degradation of the existing, largely natural watercourses. They were transformed into sewage channels, often used under the developing needs of the urban centres, included in underground structures, and lost their aesthetic values. Large rivers of the „founder” cities, i.e. Thames, Seine or Rhenium, became equally large sewers. The article highlights the history of the disappearance of networks of smaller streams that do not withstand competition with technocratic approach, particularly in large cities. Cities, where industry greatly reduced the aquatic resources of cities, polluted waters and completely rejected the landscape-recreational, as well as compositional function of watercourses in the forming of the urban structure, which develops very dynamically. Fully regulated streams have been channelled not to harass residents with unpleasant odor. Spaces associated with the water began to be seen as peripheral areas of cities. Moreover, the article examines the arguments for stopping sealing of the city which halts the flow of water in the city Although water is a renewable resource, overexploitation and the ignorant management within the basin causes its dramatic shortage, especially in the cities. The lack of integrated thinking about the problem of water makes cities turn their back on the issue. The authors focus their attention on the multi-functionality of the water infrastructure and recovery of the "space for the river", as well as on the projects in line with the principle of decoupling. The article describes successful projects, in which water is not treated as a raw material, but rather as a natural, factor necessary for life, boasting limitless possibilities that must be protected. The examples of reintegration removed from urban watercourses, which again become the basis for the composition of the city and part of restoring sustainable water management for urban areas are also presented and analyzed. Thinking about the problem of lack of the integration of water, shortage of water as a resource should be dealt with in a comprehensive way, rather than selectively. The article presents the historical and contemporary examples of integrating urban design with water engineering.
Źródło:
Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 543-554
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oczyszczanie ścieków koksowniczych w układzie zintegrowanym łączącym proces koagulacji z ciśnieniowymi technikami membranowymi
Coking wastewater treatment in the integrated system coagulation - pressure membrane techniques
Autorzy:
Mielczarek, K.
Kwarciak-Kozłowska, A.
Bohdziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1819445.pdf
Data publikacji:
2011
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
ścieki koksownicze
techniki membranowe
coking wastewater
membrane technology
Opis:
Z uwagi na ograniczone zasoby gazu i ropy naftowej podstawowym surowcem energetycznym w Polsce jest nadal węgiel kamienny, wykorzystywany m.in. do produkcji paliw koksowniczych w procesie pirolizy [1]. Jak wiadomo zakłady koksownicze niekorzystnie oddziaływają na środowisko naturalne między innymi z uwagi na generowanie podprocesowych wód koksowniczych obciążonych trudno biodegradowalnymi (BZT5/ChZT<0,02) substancjami toksycznymi [2]. W ich skład wchodzą między innymi: wielopierścieniowe węglowodory aromatyczne, związki heterocykliczne, oleje, substancje smołowe oraz związki nieorganiczne tj.: cyjanki, siarczki, siarczany, tiosiarczany, amoniak, a także jony metali ciężkich [3]. Z tego też względu ścieki koksownicze przed odprowadzeniem do odbiornika powinny być poddane procesowi oczyszczania. W zależności od rodzaju zanieczyszczeń metody ich oczyszczania powinny być tak dobrane, aby przy jak najniższych nakładach finansowych zapewnić najwyższy stopień usunięcia zanieczyszczeń. Zwiększenie efektywności oczyszczania ścieków wiąże się z rozbudową systemów ich oczyszczania o nowe procesy jednostkowe lub sprowadza się do modyfikacji układów już pracujących. Z uwagi na coraz bardziej złożony skład przemysłowych strumieni odpadowych do ich oczyszczania stosuje się układy zintegrowane kojarzące odpowiednie procesy jednostkowe. Wśród metod fizyczno-chemicznych stosowanych w przypadku ścieków obciążonych zanieczyszczeniami występującymi w postaci koloidów i drobnej zawiesiny bardzo często wykorzystywany jest proces koagulacji. Obiecującym rozwiązaniem w oczyszczaniu ścieków koksowniczych wydaje się być zastosowanie układu zintegrowanego łączącego koagulację z ultrafiltracją i odwróconą osmozą [4÷6]. W pracy omówiono wpływ procesu koagulacji na poprawę efektywności oczyszczania poprocesowych wód koksowniczych w układzie łączącym ciśnieniowe techniki membranowe tj. ultrafiltrację z odwróconą osmozą.Podjęto również próbę określenia możliwości prognozowania wielkości ultrafiltracyjnych strumieni permeatów zarówno w procesie oczyszczania ścieków koksowniczych w układzie łączącym ciśnieniowe procesy membranowe jak i w przypadku kiedy wody poprocesowe były wstępnie podczyszczane metodą koagulacji.
The paper presents results of studies aimed at determining the effectiveness of coking wastewater treatment in two integrated systems. In one system wastewater is treated using combined processes of ultrafiltration and reverse osmosis. In the second system, to increase the efficiency of wastewater treatment, an additional step of treatment is introduced - initial volume coagulation. Low-pressure membrane filtration process was carried out on membrane made of polysulfone 16% by weight. The participation of film-forming polymer in solution and during the evaporation of the solvent from the membrane surface equal to 5 s. The introduction of coking wastewater pretreatment by coagulation method resulted in the removal of such contaminants which are present mainly in the form of colloidal and macromolecular substances and thus provided a more efficient membrane ultrafiltration in the next stage of purification. Treatment of wastewater after the filtration process was performed by low-pressure reversed osmosis on membrane of polyamidetype ADF's Osmonics. Basing on assumptions of relaxation model, describing the changes in permeate flux during membrane filtration system carried out in non-stationary system, attempt to determine the possibilities of predicting the size of ultrafiltration permeate fluxes was made.
Źródło:
Rocznik Ochrona Środowiska; 2011, Tom 13; 1965-1984
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie reaktora ASBR do oczyszczania ścieków z przemysłu mięsnego
Application of anaerobic sequencing batch reactor asbr for treatment of wastewater from meat industry
Autorzy:
Kwarciak-Kozłowska, A.
Mielczarek, K.
Bohdziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1819446.pdf
Data publikacji:
2011
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
reaktor ASBR
ścieki
przemysł mięsny
ASBR reactor
sludge
meat industry
Opis:
Intensywny rozwój sektora spożywczego w Polsce odnotowano po roku 2004. Dotacje z Unii Europejskiej umożliwiły wiele inwestycji, a także zwiększenie produkcji oraz poprawy jakości produktów. Przemysł mięsny w kraju tworzy obecnie około 3500 przedsiębiorstw o różnych zakresach oraz profilach działalności. Ten dział gospodarki charakteryzuje się silnym rozdrobnieniem oraz rozproszeniem i obejmuje zarówno małe firmy rodzinne zajmujące się wyłącznie ubojem, jak również wielkie zakłady i spółki [1÷3]. Jednym z podstawowych problemów związanych z ochroną środowiska w zakładach mięsnych jest problem zagospodarowania i unieszkodliwienia powstających ścieków oraz odpadów. Nieoczyszczone ścieki odprowadzane do odbiornika mogą naruszyć jego równowagę lub całkowicie zdegradować [2, 4, 7]. W badaniach podjęto próbę określenie możliwości wykorzystania beztlenowego sekwencyjnego bioreaktora typu ASBR do produkcji biogazu i oczyszczanie ścieków z przemysłu mięsnego. Jak wiadomo procesy anaerobowe pozwalają nie tylko na rozwiązanie problemu ekologicznego, jakim jest unieszkodliwienie ścieków, ale również zapewniają korzyści ekonomiczne wynikające z produkcji wysokoenergetycznego gazu fermentacyjnego [8, 9].
The meat industry is a branch of the food sector, which significantly affects the degradation of the environment. Consuming large amounts of water consequently, also produces significant quantities of wastewater which is characterized by a high organic content and high concentration of suspended solids, inorganic salts and nutrients. The study attempted to determine the possibility of using ASBR for biogas production and treatment of wastewater from the meat industry. Anaerobic sludge concentration was on level of 20 g/dm3. Organic loading rates (OLR) were 1.25 kg COD/m3.d and sludge loading 0.06 kg COD/kg.d. During operation of ASBR there are four phases (filling - 0.5 h, the reaction - 22.5 h, sedimentation - 0.5 h and decantation - 0.5 h). The treatment wastewater were kept in ASBR for 24 hour (time of entire cycle). The research was conducted until the repeatable cycles. The repeatable cycles were extracted after three work cycles of ASBR. During methane fermentation process a considerable degree of removal of organic pollutants from raw wastewater was obtained: COD (73.3%), BOD5 (71.4%) and TOC (83.2%). The concentration of COD and BOD5 was respectively 435 mg/dm3 and 443 mg/dm3. The value of TOC reached level of 136 mg/dm3. Generated biogas in the methane fermentation process of wastewater from meat industry plant was characterized by high methane content (80.9% vol.). Processes in ASBR contributed to reduction of the number of bacteria (66.6% of mesophilic bacteria and 70.9% of psychrophilic bacteria).
Źródło:
Rocznik Ochrona Środowiska; 2011, Tom 13; 1891-1904
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ emisji komunikacyjnej na stężenie dwóch form węgla i rozkład ich masy względem wielkości cząstek w aerozolu atmosferycznym obszaru miejskiego
Influence of Vehicular Traffic on Ambient Concentration and Mass Size Distribution of Two Fractions of Carbon in an Urban Area Atmospheric Aerosol
Autorzy:
Rogula-Kozłowska, W.
Rogula-Kopiec, P.
Klejnowski, K.
Błaszczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1819029.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
obszar miejski
emisja komunikacyjna
particulate air-pollution
diesel exhaust particles
chemical composition
elemental carbon
organic carbon
road
vehicles
matter
Opis:
Ambient particulate matter (PM) is a component of the natural environment and a certain number of particles that varies with time, having many different properties which also change over time, is constantly present in the air. It can be assumed that the scope of environmental effects of PM is the broadest among all air pollutants: it affects the human health, climate, ecological conditions and visibility. Organic carbon (OC) and elemental carbon (EC) are the two most important components of suspended dust. The continuously increasing road traffic intensity is highly correlated with increasing concentrations of both of these components in the air of urbanized areas all over the world. In spite of this, the amount of data on OC and EC concentrations in Poland is still insufficient, especially in the case of areas located close to busy roads. The aim of this study was to determine the influence of vehicular traffic on ambient concentrations of PM-related OC and EC, and their mass size distribution in a typical urban area of the Upper Silesia. PM samples were collected simultaneously at two sites located in the Katowice city. One of the selected measurement points was situated in the city centre and characterized so-called urban background. The second measurement point, located near the A4 motorway, was in the area directly exposed to the influence of traffic emission. Dust was sampled during two measurement periods (2–10 August and 15–22 September 2011) using thirteen-stage impactors – DEKATI Ltd. (DLPI, Dekati Low Pressure Impactor). Analysis for the content of OC and EC in the collected dust samples was carried out by means of a thermo-optical method with the use of a Sunset Laboratory OC/EC carbon analyzer. During the entire measurement program strict adherence to the rigorous requirements for quality control of the obtained results was ensured. Concentrations of PM1-, PM2.5- and PM10-related OC and EC in Katowice, near the A4 motorway, were close to values obtained in other parts of the world in different measurement periods, at traffic sites of similar characteristics. Also values of the concentration ratio of OC bound to PM10 and PM2,5 (or PM2,5) were similar to quantities determined in different locations. In Katowice, due to municipal emission and poor quality of vehicles travelling the roads, also the coarse fraction of dust was enriched in EC. This situation is unusual in comparison to other regions. The effect of emission from engines of the cars travelling the motorway manifested itself mainly by elevated EC concentrations compared to the urban background site. For TSP the EC concentration was higher, five times in the beginning of August and two times in the second half of September. The largest differences between EC concentrations in the location near the motorway and in the urban background area were observed for the PM0.06–0.108, PM0.108–0.17 and PM0.17–0.26 fractions. In both measurement periods, at the traffic site in Katowice, the maxima of mass size distribution of EC were in the diameter range characteristic for soot emitted from Diesel engines (0.108–0.26µm). The fact that the influence of exhaust emission from vehicles travelling the motorway on EC concentrations was more pronounced in the second half of September than in the first half of August, was caused by larger EC emission from various sources in Katowice during the period following summer holidays. Concentrations of organic carbon bound to TSP in both measurement periods in Katowice was only 10% higher in the urban traffic site than in the urban background site. The largest differences between OC concentrations near the motorway and in the urban background are observed in the ranges 0.06–0.17 and 1.0–2.5 µm. Maxima of the mass size distribution of PM-related OC, both at the urban traffic site and at the background site, were similar in both measurement periods. It was inferred that the small differences between OC concentrations in the traffic and the background site are caused by the process of secondary aerosol formation, less intensive near the motorway than in the urban site.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1623-1644
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Masowy rozkład pierwiastków w próbkach pyłu zawieszonego pobranych w obszarze tła miejskiego: wyniki ośmiomiesięcznych badań w Zabrzu
Mass Size Distribution of PM-bound Elements at an Urban Background Site: Results of an Eight-month Study in Zabrze
Autorzy:
Rogula-Kozłowska, W.
Klejnowski, K.
Rogula-Kopiec, P.
Błaszczak, B.
Mathews, B.
Szopa, S.
Powiązania:
https://bibliotekanauki.pl/articles/1819065.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
rozkład pierwiastków
próbki pyłu
particulate air-pollution
trace elements
source identification
atmospheric aerosol
fine particles
heavy metals
source apportionment
Opis:
The analysis of elemental composition of ambient dust can help not only evaluate the environmental and health effects due to the air pollution but also identify emission sources. However, the whole number of projects and studies on concentrations and elemental composition of ambient (especially fine) dust hardly concern these issues in Eastern Europe. Neither is the chemical (and elemental) composition of the submicron ambient dust in Poland well recognized. There is also a shortage of data from long-term and parallel studies of the elemental composition of separate dust fractions. In the heavily polluted areas, the elemental composition of atmospheric aerosol and the dependence of elemental composition of particles on their size can appear essential for analyzing the toxicity of dust and its environmental effects. This study presents the results of determination and comparison of the elemental composition of four fractions of ambient dust in Zabrze (Poland), an urban area typical of the exposure of the Upper-Silesian Agglomeration population to the polluted air. The samples of the four dust fractions (fine: ≤1 µm – PM1, 1–2.5 µm – PM1-2.5, coarse: 2.5–10 µm – PM2.5-10, and 10–40 µm – PM10-40,) were collected during eight months (January–August 2009) with the use of a DEKATI-PM10 cascade impactor. All the dust samples (204 samples) were analyzed using a PANalytical Epsilon 5 spectrometer (EDXRF – energy dispersive X-Ray fluorescence spectroscopy). The minimum, maximum and average concentrations, for winter (January–April, heating season) and summer (May–August, non-heating season), of 38 elements from each of the four examined dust fractions were calculated. The influence of anthropogenic sources on the ambient concentrations of elements from each dust fraction was determined by analyzing the enrichment factors (EF). The strength of linear relationships (Pearson’s linear correlation coefficients) between each pair of elements was determined separately for fine and coarse dust. The highest ambient concentrations were assumed by two nonmetals – sulfur and chlorine; their concentrations were significantly lower in summer than in winter. Both sulfur and chlorine were mainly bound onto the finest particles. Their share in the coarse dust, even in summer, was small. They came from anthropogenic sources. Ambient, typical crustal, Si, Al, Fe, Mg, K, Ca, Ti, Sr, Rb in Zabrze came from natural sources regardless of the fraction they were bound to. Small seasonal variations in ambient concentrations of these elements or some of the concentrations higher in summer than in winter confirmed the fact. A significant portion of the mass of the crustal elements, especially of Al, Si and Fe, was concentrated in the coarse fractions. However, the mass distribution among the dust fractions indicates some of them (K, Ca, Mg, Rb, Sr) as coming partly from anthropogenic sources. It particularly concerns their part bound to fine dust in winter. The mass contribution of crustal matter to ambient dust was about 6.8 in winter and 9.7% in summer; the contribution to PM1 was half of it. Almost all remaining 27 elements (except for Mn, Zn, Ge, Sb, La) had the ambient concentrations not greater than 100 ng m-3, usually higher in winter. The average mass shares of each of these 27 elements in PM1, PM1-2.5, PM2.5-10, and PM10-40, were different and depended on the season of a year. Co, Cu, Zn, Pb and As were cumulated mostly in fine dust, while V, Mn, Co, Cr, Ni, Ag, Cd and Ba in coarse dust. The former, in fine dust, were assumed to be rather of anthropogenic origin and closely associated with combustion. The later originated partly from combustion (especially in winter) but their greater part was secondary and came from road dust. The largest contributors to the mass of the elements in fine dust in Zabrze are domestic furnaces and car engines, i.e. combustion of fossil fuels, biomass, and waste. The possible effect of industrial sources was also identified. The elemental composition of coarse dust is due to re-suspension of soil and road dust, and to a lesser extent, to municipal emission.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1022-1040
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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