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Wyświetlanie 1-15 z 15
Tytuł:
Pola irygacyjne Osobowice – historia i teraźniejszość
Osobowice irrigation fields – history and present time
Autorzy:
Łyczko, W.
Powiązania:
https://bibliotekanauki.pl/articles/399586.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
rolnicze wykorzystanie ścieków
glebowa oczyszczalnia ścieków
agriculture waste water use
plant-soil waste water treatment plant
Opis:
Pola irygacyjne Osobowice pełniły przez przeszło 100 lat funkcję naturalnej oczyszczalni ścieków wrocławskiej aglomeracji miejskiej. Obiekt ten położony jest na Równinie Wrocławskiej, w północnej części Wrocławia – pomiędzy korytami dwóch rzek: Odry i Widawy. Początki funkcjonowania oczyszczalni sięgają lat 80. XIX w. – powierzchnia pól irygowanych zajmowała wtedy około 560 ha. Z czasem obszar ten ulegał systematycznemu powiększaniu, prawie do 1300 ha. W związku z uruchomieniem (i modernizacją w 2012 r.) Wrocławskiej Oczyszczalni Ścieków na Janówku, udział pól irygowanych w procesie oczyszczania ścieków ulegał systematycznemu zmniejszaniu – zarówno pod względem ilości ścieków, jak i powierzchni zalewanej. Eksploatację pól zakończono ostatecznie w roku 2013. W znacznej części powierzchni obszar ten stanowi obecnie użytek ekologiczny, w związku z występowaniem na tym obszarze bogatej fauny i flory. W pracy przedstawiono historię obiektu, szczegóły jego funkcjonowania i gospodarki wodnej w trakcie eksploatacji a także obecny stan pól, głównie pod kątem wód gruntowych, które po zakończeniu zasilania tego terenu ściekami obniżyły się wyraźnie na znacznej jego części.
Osobowice irrigation fields served as a natural sewage treatment plant of the Wroclaw urban agglomeration for over 100 years. The object is located on the Wroclaw Plain, in the north part of Wroclaw – between two river beds: Odra and Widawa. The beginning of the exploitation of the fields dates back to the year 1880. The irrigated area, at that time, was about 560 ha. In next years, the fields were systematically expanded almost to 1300 ha. After the Janowek Sewage Treatment Plant start-up (and its modernization in 2012) the share of irrigated fields in the sewage treatment process has been systematically decreased, both in terms of the amount of sewage and the flooded area. The fields exploitation was finished in 2013. A large part of the area, now constitutes the ecological area, due to the occurrence of a rich fauna and flora in this area. The work presents the history of object, details of the facility’s operation and characteristics of water management during its operation, as well as the current state of the fields, mainly in terms of groundwater levels, which – without flooding this area with sewage – have decreased in a significant part of this terrain.
Źródło:
Inżynieria Ekologiczna; 2018, 19, 4; 37-43
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Hydrocyclones to Improve Membrane Technologies for Urban Wastewater Treatment
Autorzy:
Kassymbekov, Zhuzbay
Akmalaiuly, Kenzhebek
Kassymbekov, Galimzhan
Powiązania:
https://bibliotekanauki.pl/articles/1839644.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
waste water
post-treatments
membrane technology
hydrocyclone
testing
Opis:
The technologies associated with the use of a membrane bioreactor (MBR) are becoming one of the dynamically developing directions in the wastewater disposal system. However, a certain part of the used design of membrane units are exposed to mechanical contamination, which significantly impairs their performance. This is especially noticeable when working at wastewater treatment plants, where the required degree of preliminary cleaning from solid mechanical particles and suspended solids is not provided. The purpose of the work was to improve the process of post-treatment of urban wastewater and protect the membrane element of the installation from clogging with coarse impurities and wear, with an overestimated concentration of suspended solids. The essence of the improved membrane technology of wastewater treatment consists in the preliminary capture of heavy and suspended particles with a size of more than 0.03 microns in a hydrocyclone, followed by water treatment in a chamber of a membrane bioreactor of modern design. The operating conditions of the membranes were determined by the operating modes and parameters of the bioreactor, in particular, by the degree of formation of colloidal compounds in it, which adversely affect the permeability. The density of the initial water varied within 1.059–1.078 g/cm3, and the content of solid particles was up to 0.3 mm. The activated sludge was filtered under vacuum on a Buchner funnel through a thin layer of cotton wool and gauze. During the tests, the indicators for capturing suspended solids were 5.0–9.0 mg/dm3, whereas, when working without a hydrocyclone, they were equal to 27–30 mg/dm3. The maximum performance of the hydrocyclone is provided at an inlet pressure of 225–300 kPa, and the pressure loss in the hydrocyclone chamber is 7.9–9.0 kPa. It was established that additional preparation of waste water for the post-treatment process using a hydrocyclone increases the cleaning capacity of membrane elements by reducing the load of accumulation of coarse impurities on the membrane surface.
Źródło:
Journal of Ecological Engineering; 2021, 22, 4; 148-155
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Removal Investigation of Coconut Acid Surfactants in Activated Sludge’s System
Autorzy:
Moazzenipour, B.
Salehpour, A.
Ahansazan, B.
Ghorbanian, S.
Rashedi, H.
Powiązania:
https://bibliotekanauki.pl/articles/124941.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Cocamide DEA
surfactant
waste water
activated sludge
COD
Opis:
There are significant municipal concerns relating to the use of surfactants and enzymes in the process of wastewater treatment. Treatment plants use different techniques to remove impurities from water. As wastewater treatment plants use the latest technology to remove contaminants from water, there are high costs, and sometimes an enforcement of regulations is lax. Still, many municipalities across the country prohibit the use of surfactants and enzymes entering wastewater treatment because of the harmful effects of these products on the sewer lines and high damage costs. Surfactant compounds are organic. Their molecules include water-soluble and oil or an insoluble component. These molecular compounds seek the water surface and chemically reduce the boundaries between oil and water. When surfactants are in the water, they absorb into the soil and can cause injury to plants and organic organisms, but people find surfactants and enzymes useful in cleaning agents for emulsifying and dispersing oil and grease. Scientists have found that at least some surfactants are toxic to ecosystems, people and animals, but they have not been able predict far-reaching consequences. And now the most important question is how to solve this problem or how to reduce these negative effects. In this paper we tried to remove surfactants from waste water with an activated sludge system.
Źródło:
Journal of Ecological Engineering; 2017, 18, 3; 68-73
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Pond on Water Quality in the Čermná Stream
Autorzy:
Hubačíková, V.
Oppeltová, P.
Powiązania:
https://bibliotekanauki.pl/articles/952354.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ammonia nitrogen
nitrate nitrogen
nitrite nitrogen
concentration
waste water
Opis:
The aim of this study is to demonstrate the positive impact of ponds on water quality in a small stream Čermná. Four sites were sampled regularly every month for one year. Simultaneously, pH and temperature were measured continuously. The concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen were determined by subsequent analysis of the water samples. The results were classified in compliance with Government Decree (GD) No. 401/2015 Coll., as amended, and Czech standard ČSN 75 7221. High concentrations of ammonia nitrogen that were detected during the whole period are the result of the discharge of all wastewater from the village of Dolní Čermná to flow Čermná. Although the results showed a positive effect pond Čermenský, during the growing season the concentration of ammonia nitrogen at SP No. 2 placed under the pond increased mainly due to fertilizing pond by manure to increase nutrients for the fish population in the pond.
Źródło:
Journal of Ecological Engineering; 2017, 18, 1; 42-47
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experience of Suckling Perfection of Secondary Clarifier of Aeration Station in Almaty, Kazakhstan
Autorzy:
Ospanov, K. T.
Demchenko, A. V.
Kudaiberdi, Z.
Powiązania:
https://bibliotekanauki.pl/articles/123839.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water disposal
waste water
secondary sedimentation tank
activated sludge
cesspool emptier
sucker
Opis:
This article presents the results of experimental studies pertaining to the suckling improvement of secondary clarifier in an aeration station in Almaty. According to the obtained research results, the work of secondary clarifiers was evaluated for the removal of suspended solids, concentration of returned sludge and sediment moisture. The technical specifications of aerations, secondary settling tanks and cesspool emptier in the aeration station of Almaty were defined. Additionally, it was shown that the use of the articulated sucker with movable scrapers can increase the efficiency of cleaning the bottom of the circular tanks. In this practical test, the proposed suckling radial settler in aeration station of Almaty during the year showed that the sucker reduces the costs for the installation and maintenance of cesspool emptier and has no damaging effects on the bottom of the sump.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 210-218
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie wstrzykowej analizy przepływowej z dyfuzją gazową i detekcją spektrofotometryczną do monitorowania zawartości siarczków rozpuszczalnych w wodach i ściekach
An application of flow injection analysis with gas diffusion and spectrophotometric detection for the monitoring of dissolved sulphide concentration in environmental samples
Autorzy:
Cykowska, M
Bebek, M
Mitko, K
Rodak, A
Powiązania:
https://bibliotekanauki.pl/articles/401884.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
siarczki
wstrzykowa analiza przepływowa
dyfuzja gazowa
detekcja spektrofotometryczna
woda i ścieki
sulphide
flow injection analysis
gas diffusion
spectophotometric detection
water and waste water
Opis:
Monitorowanie zawartości siarczków w próbkach środowiskowych jest niezwykle ważne ze względu na wysoką toksyczność siarkowodoru. Ponadto siarkowodór jest bardzo istotnym parametrem określającym stopień zanieczyszczenia środowiska. Skomplikowana matryca niektórych próbek środowiskowych utrudnia zastosowanie klasycznych metod badań, przede wszystkim ze względu na pracochłonność i trudny do wyeliminowania wpływ czynników interferujących. Problem rozwiązuje wstrzykowa analiza przepływowa (FIA - Flow Injection Analysis) znajdująca coraz szersze zastosowanie w laboratoriach kontrolno-pomiarowych i środowiskowych zajmujących się monitorowaniem jakości wód i ścieków. W artykule przedstawiono możliwości wykorzystania wstrzykowego analizatora przepływowego (FIAcompact, firmy MLE) z dyfuzją gazową i detekcją spektrofotometryczną do monitorowania zawartości siarczków rozpuszczalnych w wodach i ściekach. Zastosowanie dyfuzji gazowej w metodyce oznaczania siarczków techniką przepływową pozwala zminimalizować wpływ matrycy na wynik analizy. Użyta hydrofobowa membrana przepuszcza wyłącznie substancje w formie gazowej, stanowiąc barierę dla pozostałych składników próbki, dzięki czemu można skutecznie analizować roztwory o wysokiej zawartości związków interferujących, mętne i barwne. Badania przeprowadzone dla roztworów wzorcowych i próbek środowiskowych, mające na celu optymalizację warunków pomiarowych i określenie wartości podstawowych cech jakościowych i ilościowych metody (m.in. granicy wykrywalności i oznaczalności, precyzji, poprawności), potwierdzają przydatność proponowanej metody do monitorowania stężenia siarczków w wodach i ściekach pod kątem oceny ich jakości. Pełna automatyzacja i praca w układzie zamkniętym znacznie skraca czas analizy, minimalizuje zużycie próbki i odczynników oraz zwiększa bezpieczeństwo pracy analityka.
The monitoring of the concentration of sulphide is very important from the environment point of view because of high toxicity of hydrogen sulphide. What is more hydrogen sulphide is an important pollution indicator. In many cases the determination of sulphide is very difficult due to complicated matrix of some environmental samples, which causes that most analytical methods cannot be used. Flow injection analysis allows to avoid matrix problem what makes it suitable for a wide range of applications in analytical laboratories. In this paper determination of dissolved sulphide in environmental samples by gas-diffusion flow injection analysis with spectrophotometric detection was presented. Used gas-diffusion separation ensures the elimination of interferences caused by sample matrix and gives the ability of determination of sulphides in coloured and turbid samples. Studies to optimize the measurement conditions and to determine the value of the validation parameters (e.g. limit of detection, limit of quantification, precision, accuracy) were carried out. Obtained results confirm the usefulness of the method for monitoring the concentration of dissolved sulphides in water and waste water. Full automation and work in a closed system greatly reduces time of analysis, minimizes consumption of sample and reagents and increases safety of analyst’s work.
Źródło:
Inżynieria Ekologiczna; 2013, 32; 17-24
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of the Type of Admixture on the Properties of Polyacrylonitrile Membranes Modified With Nanotubes, Graphene Oxide and Graphene
Autorzy:
Fryczkowska, B.
Przywara, L.
Powiązania:
https://bibliotekanauki.pl/articles/124223.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
composite membranes
PAN/GO
PAN/RG
PAN/MWCNT
ultrafiltration
electroplating waste water
Opis:
This paper presents the results of research on the production of composite polyacrylonitrile (PAN) membranes with nanotubes (MWCNT), graphene (RG) and graphene oxide (GO) addition. All of the specified additions differ diametrically in terms of properties, starting from the spatial structure of the particles, to the chemical properties. The membranes were obtained using phase inversion method from a solution of N,N-dimethylformamide (DMF). Subsequently, the impact of the nano-addition on the transport and separation properties of the membranes was investigated using Millipore AMICON ultrafiltration kit. Membranes with graphene addition (PAN/RG) are characterized by the best transport properties and the highest specific permeate flux values in the range of ~913÷1006 dm3/m2×h for the working pressure of 2.0 MPa. In order to test the separation properties, electroplating wastewater generated in one of the Silesian galvanizing plants was used. The qualitative and quantitative composition of the wastewater was tested by means of UV-Vis spectrophotometer (HACH) and absorption atomic spectrometry (AAS). The ultrafiltration process carried out on composite membranes allows for the complete removal of phosphate ions and ~88÷94% removal of iron from the waste water. The rejection coefficient of the remaining metals is high: ~35÷85% for copper and ~17÷100% for cadmium.
Źródło:
Journal of Ecological Engineering; 2017, 18, 5; 72-81
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comprehensive Assessment of the Impact of the Almaty Wastewater Storage System on the State of Groundwater
Autorzy:
Ospanov, Kairat
Absametov, Malis
Murtazin, Yermek
Iskanderov, Rustam
Powiązania:
https://bibliotekanauki.pl/articles/2086383.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water disposal
waste water
storage system
impact on groundwater
filtration
stability of loose massif
pollution
Opis:
This article presents the results of studies on the comprehensive assessment pertaining to the peculiarities of nutrition, accumulation, transit and discharge of groundwater in the adjacent territory of the Sorbulak reservoir. The information about the waste water storage was presented. The results of the analysis and decryption of satellite images, as well as the results of aerial photography of the territory of the Sorbulak were presented. The results of field route studies of the work area were presented to identify the external manifestations of directional filtration, areas of exits to the daytime surface of groundwater. The results of the calculation of the filtration flow controlled by the Sorbulak storage lake, unloading through the western side of the plateau into the Kurty River, were presented.
Źródło:
Journal of Ecological Engineering; 2022, 23, 4; 75--84
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka jakościowa zużytych wód technologicznych po hydraulicznym rozładunku ryb w portach
Quality characteristics of technological waste water after hydraulic unloading fish at ports
Autorzy:
Janiszewska, D.
Kozieł, K.
Pawlikowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/401092.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
rybołówstwo
hydrauliczny wyładunek ryb
zużyte wody technologiczne
jakość
fishing
hydraulic landing of fish
technological waste water
quality
Opis:
W pracy dokonano charakterystyki właściwości sensorycznych i wskaźników fizykochemicznych reprezentatywnych próbek zużytych wód technologicznych po hydraulicznym wyładunku ryb z jednostek rybackich, w tym z kutrów wyposażonych w system RSW lub CSW. Przeprowadzone oceny i oznaczenia analityczne w pobranych próbkach zużytych wód technologicznych wykazały, że ich wyróżniki sensoryczne oraz zawartości wskaźników fizykochemicznych były zróżnicowane w zależności od przeznaczenia złowionych ryb (cele konsumpcyjne lub paszowe), czasu kontaktu z wodą morską oraz temperatury wody (sezon zimowy, letni). Zużyte wody technologiczne, ze względu na zawartość dużych ilości substancji białkowych, tłuszczów, azotu, fosforu oraz związków chloru są zagrożeniem dla środowiska naturalnego. Z tego względu utylizacja wód technologicznych pochodzących z kutrów poławiających ryby bałtyckie jest jedną z najważniejszych kwestii do rozwiązania dla rybaków oraz ekologów.
In this study characterization of sensory and physical-chemical properties of representative samples of technological waste water after hydraulic unloading fish from fishing vessels, including fishing boats equipped with RSW (Refrigerated Sea Water System) or CSW (Chilling Sea Water System) system was described. Sensory quality and analytical determinations in technological waste water samples was analyzed. They demonstrated that their sensory quality attributes and physical-chemical properties were different and depending on the destination of fish caught (consumption or industrial fishing), contact time-caught fish with seawater and water temperature (winter or summer season). Because technological waste water has a lot of substance content of protein, fat, nitrogen, phosphorus and chlorine compounds it is a threat to the natural environment. In connection with such a broad problem of utilization of technological waste water from fishing boats for Baltic fish is one of the most important issues to solve for fishermen and environmentalists.
Źródło:
Inżynieria Ekologiczna; 2015, 43; 172-178
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of landfill pollution with special emphasis on heavy metals
Autorzy:
Vaverková, M.
Adamcová, D
Powiązania:
https://bibliotekanauki.pl/articles/124739.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
heavy metals
leachate
surface water
groundwater
landfill
waste
Opis:
Monitoring leachate, groundwater and surface water aiming to determinate the concentration of heavy metals (Hg, Zn, Ni, Cr+6,Cd, Pb) at the municipal solid waste landfill Štěpánovice took place in the years 2002–2010. The values of heavy metals concentration oscillated as follows: Zn (0.05 – 0.37 μg/ dm3), Cr+6 (0.01 – 3.3 μg/dm3), Hg (0.0001 – 0.001 (μg/ dm3), Ni (0.001 – 0.19 μg/ dm3, Cd (0.001 – 0.007 μg/ dm3) and Pb (0.002 – 0.176 μg/dm3). The measured data show that the concentrations of heavy metals met the limits provided by law. Under the current landfill operation mode, the results of measurements do not indicate any negative impact on the quality of surface water, groundwater or leachate water.
Źródło:
Journal of Ecological Engineering; 2014, 15, 2; 1-6
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of landfill leachate pollution: findings from a monitoring study at municipal waste landfill
Autorzy:
Vaverková, M. D.
Adamcová, D.
Powiązania:
https://bibliotekanauki.pl/articles/125392.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
groundwater monitoring
leachate monitoring
municipal solid waste landfill
surface water
water monitoring
Opis:
The monitoring that was carried out at the landfill specialized in leachate, groundwater and surface water. There were 6 sampling sites. The observed parameters were pH, BOD5, CODCr, conductivity. Leachate reached the high values in all observed parameters. Groundwater samples were collected at two monitoring wells and the sampling site (A, B, C). Surface water was collected from two sampling sites (D, E). The pH showed slightly acid values at all sampling points. The pH of surface water was slightly acid to neutral. Both BOD5 and CODCr values remained stable over the reporting period. The average conductivity value at sampling points D, E remained constant. In line with the Czech National Standard ČSN 75 7221 “Classification of Surface Water Quality” sampling point D belongs to II Water Quality Class – slightly polluted water and sampling site E to Class I water quality – unpolluted water. The authors believe that the fluctuations occurring with regard to the values of certain samples were not caused by the operation of the landfill itself, but were a result of the intense agricultural activity nearby the landfill.
Źródło:
Journal of Ecological Engineering; 2015, 16, 2; 19-32
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Pollution Level of Surface and Waste Water
Autorzy:
Pohrebennyk, Volodymyr
Kulyk, Mykhailo
Bihun, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/124885.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
industrial waste
surface water
industrial wastewater
drainage water
toxicity index
disposal
harmful ingredient
Opis:
The household and industrial wastes that have been accumulated during the last 40–50 years organized and spontaneous landfills (garbage dumps) pollution of the natural water bodies near locations. As results of precipitation and solar irradiation, the drainage of water formation occurs; such waters are polluted with harmful and toxic ingredients. The known indices of pollution of industrial and surface waters as well as the technique for determining the class of danger posed by solid household wastes were analyzed. The application of this technique to liquid wastes is suggested, since the change of aggregate state must not restrict its application; on the contrary, a new useful unexpected result can emerge with this. A rather simple dimensionless index of toxicity was chosen on the basis of the following examples: composition of the drainage waters of a specific landfill, content of harmful ingredients in them, excess ratio of their maximum permissible concentration. Such an index takes into account the maximum permissible concentration of the harmful substance in the ground, as well as the fraction of the harmful ingredients in the total mass of the liquid waste. Using the dimensionless index of toxicity, the bar charts were drawn, from which the sequence of removal of harmful components from the liquid mixture can be determined, starting with the component with the least value of dimensionless index of toxicity which characterizes the most dangerous component.
Źródło:
Journal of Ecological Engineering; 2020, 21, 5; 180-188
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Eco-Friendly Absorption Method of Cu2+, Cd2+, and Pb2+ Using the Shells and Chitosan Derived from Solen vagina
Autorzy:
Maulani, Dyan
Nofianti, Kholis Amalia
Sugijanto, Noor Erma
Kartosentono, Sugijanto
Powiązania:
https://bibliotekanauki.pl/articles/1955429.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Solen vagina
chitosan
mollusca shell
biosorbent ability
water pollution
zero waste
Opis:
The processing of Mollusca for food consumption generates a large amount of by-products; for instance, shells, which may contaminate and deposit in the marine coastal environment. Therefore, additional processing is needed to reduce and transform shells into valuable materials, such as chitosan or another derivate product. This study aimed to isolate and characterize the chitosan from Solen vagina (known as lorjuk shells in Indonesian) and to determine the application of chitosan. This is to be compared with Solen vagina shell powder that commonly functions as bio-sorbent of water pollutants Cu2+, Cd2+, and Pb2+. The isolated chitosan was characterized based on its physicochemical properties, namely purity as tested by using X-ray fluorescence (XRF), and functional group as confirmed by Fourier transform infrared (FTIR). In addition, bio-absorbent ability was evaluated through a column method, where the chitosan products are used and compared with Solen vagina shell powders. In this study, the chitosan isolated from Solen vagina shells yielded 15.92 ± 1.78% and showed a high deacetylation degree (DD) by 85.00 ± 3.98%. FTIR and physicochemical properties analysis confirmed that the isolated chitosan is of good quality, as standardized by industry regulator; thus, it could be used as food product and bioabsorbent material. Moreover, the bio-absorbent ability of chitosan demonstrated a similar value with S. vagina shell powders, which can absorb more than 92% of heavy metals around second elution. In conclusion, the S. vagina shell powder and the isolated chitosan have the potential as natural bio-absorbent to reduce the heavy metal contents in industrial wastewater.
Źródło:
Journal of Ecological Engineering; 2021, 22, 7; 212-222
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Migration of Hazardous Components of Municipal Landfill Leachates into the Environment
Autorzy:
Popovych, Vasyl
Telak, Jerzy
Telak, Oksana
Malovanyy, Myroslav
Yakovchuk, Roman
Popovych, Nataliya
Powiązania:
https://bibliotekanauki.pl/articles/124784.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydrosphere
physical properties
chemical properties
leachates
water pollution
municipal solid waste
Opis:
The research on the physical and chemical properties of landfill leachates and migration of its hazardous components into hydrosphere and biosphere is a current problem in the global context. The object of the research is landscape-changing factors of the Lviv municipal landfill (Ukraine). It was defined that the largest part of oil products accumulates in the leachates at the south-western side of the landfill (23.6 mg/dm3) and it is 2.36 times higher than the value of the maximum permissible concentration (MPC) (10 mg/dm3); the most saline leachates with chlorides and sulfites are those accumulating at the foot and at the northwestern side; the phosphate content of the investigated leachate samples was the highest at the foot of the landfill and amounted to 12.8 mg/dm3, which exceeds the MPC (10 mg/dm3) by 1.28 times; high concentration of ammonium nitride was discovered in the leachates at the foot (76.1 mg/dm3) and at the northwestern side (46.3 mg/dm3), which exceeds the MPC (30 mg/dm3) by 2.53 and 1.54 times, respectively; the highest indicators of total iron are typical for basins nearby (at the foot – 68.2 mg/dm3, at the northwestern side – 56.3 mg/dm3) and exceed the MPC norms (2.5 mg/dm3) by 27.28 and 22.52 times, respectively. According to certain indicators, the content of hazardous components in the leachates, which accumulate at the foot and at the northwestern side, exceeds the MPC and is several times higher than in the natural basins at the distance of 800 and 1200 m.
Źródło:
Journal of Ecological Engineering; 2020, 21, 1; 52-62
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Studies on Hydrothermal Treatment of Municipal Solid Waste for Solid Fuel Production
Autorzy:
Djaenudin, -
Permana, Dani
Ependi, Mahyar
Putra, Herlian Eriska
Powiązania:
https://bibliotekanauki.pl/articles/1955568.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
holding time
hydrochar
hydrothermal treatment
municipal solid waste
feed to water ratio
Opis:
Using the Hydrothermal process to reduce the volume of the Municipal Solid Waste (MSW) which is mostly organic component and to utilize the solid powder resulted as coal-like solid fuel will contribute not only to solving the MSW problem but also reducing the coal consumption in the power plant. In this study, the hydrothermal processes were conducted using a laboratory scale apparatus with MSW components as the samples. The process parameters comprised temperature, solid load, and holding time. Four components were used as representative of organics and plastics in the municipal solid waste. In this study, the experiments were done performed at various temperatures, 180 °C, 200 °C, and 220 °C inside an experimental autoclave. The results of the experiments show that the process time, the water amount and the temperature which are used in hydrothermal process, affect the proximate and ultimate compositions. The moisture and fixed carbon content decrease and the volatile matter increases, so that the calorific value of MSW increases. On the basis of the experiments, the optimum hydrothermal process parameters are feed to water ratio of 1/1 (250 g/250 ml), temperature of 180 °C, and holding time of 90 min. It also can be concluded that the hydrothermal process can be applied to MSW to produce solid fuel.
Źródło:
Journal of Ecological Engineering; 2021, 22, 9; 208-215
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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