Temat: valorization - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Characterization of the Zellidja Lead Smelter Slag (Eastern Morocco) in order to their Valorization in Civil Engineering
Autorzy:: Moussaoui, Raja
El Alami, Souad El Moudni
Aouraghe, Hassan
Powiązania:: https://bibliotekanauki.pl/articles/124570.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: characterization
slag
Zellidja
valorization
civil engineering
Opis:: The Zellidja Lead Smelter Company (Eastern Morocco) was created by Jean Walter in 1939 for the purpose of transforming lead concentrates into pure metal. Its activity was always at the origin of the production of huge quantities of solid mining waste with granular aspect. Today, despite the definitive cessation of its production in 2012 due to the depletion of ore, millions of tons of slag are piled up between the back of the foundry and the watercourse of Oued El Heimer. This open-air storage site represents a significant environmental and economic risk resulting from the surface water and groundwater pollution. In addition, as part of the strengthening of the Moroccan construction sector and infrastructure (which requires enormous quantities of natural aggregates), studying the possibilities of using these by-products as building materials seems interesting. For these reasons, the objective of our research work is the characterization of Zellidja slag for their valorization in civil engineering. This valorization has three objectives: to solve the problem of the landfill of the mining waste, to search for an alternative material responding to the increased needs for granular materials and to protect the national patrimony in raw material. In order to ensure the feasibility of this valorization, these tailings were the subject of a complete characterization. The results of this characterization prove that these by-products with a granular aspect have interesting geometric, physical, chemical and mechanical characteristics favoring their valorization in concrete.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 71-81
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Metoda oceny wartości przyrodniczej obszaru gminy ze szczególnym uwzględnieniem roli mokradeł
Method of assessment of natural value area municipalities with special reference to the role of wetlands
Autorzy:: Stręk, M.
Lipka, K.
Powiązania:: https://bibliotekanauki.pl/articles/400354.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: mokradła
waloryzacja przyrodnicza
wetlands
valorization of natural value
Opis:: W pracy przedstawiono propozycję metody oceny wartości przyrodniczej na przykładzie obszaru gminy Sędziszów Małopolski z uwzględnieniem funkcji badanych mokradeł. Waloryzacji dokonano na podstawie metody Oświta i Dembka.
This work presented a proposal method for assessing the natural value for area of the municipalities of Sedziszów Malopolski, taking into account the functions of wetlands. The valorisation was made on the basis of the methods Oświt and Dembek.
Źródło:: Inżynieria Ekologiczna; 2012, 29; 192-201
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Distilled Spirit Extraction of Phenolic Antioxidants from Fruit and Vegetable Residues
Autorzy:: Ortinero, Cesar V.
Rafael, Rosalie R.
Rayos, Charmaine Eljie R.
Bautista, Katherine D. A.
Feliciano, Mark Aldren M.
Natividad, Lexter R.
Natividad, Gaudencio M.
Powiązania:: https://bibliotekanauki.pl/articles/1839552.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: phenolics
antioxidant
waste valorization
agricultural by-product
distilled spirit
Opis:: There is a growing interest in natural antioxidants due to their potential in improving the quality of food and cosmetic products and their health-promoting properties. Distilled spirits contain high amount of ethanol and may be an alternative to the food-grade solvents, while agricultural by-products contain phenolic substances that may have antioxidant properties. This study was therefore conducted to find out if gin, vodka, and tequila flavored spirit, alcoholic beverages with about 40% ethanol, can extract the phenolic compounds from agricultural by-products, and to determine if the extracts possess the antioxidant activity. Peels of ripe banana (Musa acuminata), ripe mango (Mangifera indica), calamansi (Citrofortunella microcarpa), squash (Cucurbita maxima), ripe pineapple (Ananas comosus), purple yam (Dioscorea alata), and sweet potato (Ipomea batatas) were collected, dried, and ground. The phenolic substances in the plant materials were extracted with alcoholic beverages or 40% ethanol. The total phenolic content (TPC) of the extracts was determined by means of UV-Vis spectroscopy using Folin-Ciocalteau reagent and gallic acid as reference compound. The antioxidant activity of the extracts was evaluated through the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. Butylated hydroxyanisole (BHA) served as positive control in the DPPH assay. Non-linear regression was applied to the DPPH assay data to estimate the values of median effective concentration (EC50). All three alcoholic beverages were able to extract the phenolic materials from the plant samples. However, the ability of vodka and gin to extract the phenolic substances was either statistically comparable or better than 40% ethanol. The results of the DPPH scavenging assay showed that the M. indica peel had the strongest activity, while C. microcarpa had the weakest scavenging activity. At 1000-ppm level, the antioxidant activity of the M. indica peel was comparable with that of BHA, regardless of the solvent used for extraction. Therefore, the M. indica peel can be a source of natural antioxidants and potential substitute to synthetic antioxidants. Both gin and vodka can be used as a substitute for food-compatible solvents.
Źródło:: Journal of Ecological Engineering; 2021, 22, 1; 125-131
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Bioconversion of Citrofortunella Microcarpa Fruit Waste Into Lactic Acid By Lactobacillus Plantarum
Autorzy:: Ortinero, C. V.
Mariano, A. P. B.
Kalaw, S. P.
Rafael, R. R.
Powiązania:: https://bibliotekanauki.pl/articles/123145.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Lactobacillus plantarum
Citrofortunella microcarpa
lactic acid
waste valorization
bioconversion
Opis:: The processing of Citrofortunella mircocarpa fruit juice generates large volume of solid waste, causing disposal problem. Several studies have demonstrated that wastes from agricultural and food processing industries such as fruit and vegetable peels contain high amount of polysaccharides that can be transformed into useful chemicals, including lactic acid, through fermentation. Lactic acid is widely used in various industries, such as in the manufacture of biodegradable plastic, and the demand for this chemical justifies the search of renewable feedstock for its biotechnological production. This study aimed to produce lactic acid from C. microcarpa fruit waste biomass through fermentation with Lactobacillus plantarum. The hydrolysate from C. microcarpa fruit waste was prepared, inoculated with different amounts of L. plantarum cell suspension, and incubated for three days. Lactic acid production was monitored daily. The lactic acid produced from the fermentation was recovered as calcium lactate and lactic acid crystals. The identity of the crystals was evaluated using Fourier transform infrared spectroscopy (FTIR) spectroscopy and paper chromatography. The highest lactic acid production was observed in fermentation mixtures containing the highest number of L. plantarum cells. Within three days of fermentation, the amount of lactic acid production increased with increasing period of incubation. Partial characterization of the crystals recovered from the fermentation mixtures by FTIR spectroscopy showed that the peaks in the spectrum were consistent with the chemical structure of lactate. Paper chromatography results likewise confirmed that the crystals are lactate. C. microcarpa fruit waste can afford lactic acid when fermented with L. plantarum. The results of the study may serve as basis for the development of technology for the utilization of C. microcarpa fruit waste biomass as renewable resource for industrial production of lactic acid.
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 35-41
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Polskie doświadczenia w identyfikacji i waloryzacji krajobrazu
Polish experience in landscape identyfication and valorisation
Autorzy:: Solecka, I.
Powiązania:: https://bibliotekanauki.pl/articles/399507.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: identyfikacja krajobrazu
waloryzacja krajobrazu
jednostki krajobrazowe
kryteria waloryzacji
krajobraz priorytetowy
audyt krajobrazowy
landscape identyfication
landscape valorization
landscape units
valorization criteria
priority landscape
landscape audit
Opis:: Celem artykułu jest analiza metod identyfikacji i waloryzacji krajobrazu autorstwa polskich naukowców na potrzeby wyznaczania jednostek krajobrazowych w skali lokalnej. Wykonano przegląd literatury tematu i najważniejsze metody zostały przedstawione w formie tabeli. Przeanalizowano metody identyfikacji krajobrazu pod kątem kryteriów wyznaczania jednostek i skali w jakiej stosowana jest metoda. Metody waloryzacji przeanalizowano ze względu na kryteria oceny wartości krajobrazu, skali oraz występowania elementów krajobrazu naturalnego i kulturowego. Z przeprowadzonych badań wynika, że holistyczne podejście do krajobrazu jest coraz bardziej popularne zarówno w metodach identyfikacji jak i waloryzacji. Większość metod jest dostosowana do skali regionalnej, a stosowane kryteria waloryzacji są trudno mierzalne. Zauważono brak metod stosowanych w skali lokalnej przy pomocy obiektywnych narzędzi oceny.
The aim of the article is to analyze the methods of landscape identification and valorisation developed by Polish researchers to identify landscape units in local scale. Literature review of the topic and the most important methods were presented in a form of a table. I analyzed the method of identifying the landscape in terms of the criteria for landscape units identification and the scale on which the method is used. I analyzed the valorisation methods due to the criteria for assessing the value of the landscape, scale and the presence of elements of natural and cultural landscape. The research shows that a holistic approach to landscape is becoming more and more popular, both in the methods of identification and valorisation. Most methods are adapted to the regional scale, and the used criteria of evaluation are difficult to measure. I noticed the lack of methods used at the local level with the help of objective assessment tools.
Źródło:: Inżynieria Ekologiczna; 2016, 50; 223-231
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Thermodynamic Analysis and Mathematic Modeling of Waste Sludge from Drinking Water Treatment Plants
Autorzy:: Azeddine, Fantasse
El Khadir, Lakhal
Ali, Idlimam
Powiązania:: https://bibliotekanauki.pl/articles/2026746.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water sludge
sludge valorization
wastewater management
thermodynamic analysis
isosteric heat
Opis:: Water treatment annually produces a huge amount of Drinking Water Treatment Sludge (DWTS) wastes. The latter causes environmental problems in Morocco in terms of energy and pollution. Therefore, cost-effective and eco-friendly solutions for managing them should be proposed in order to reduce the frequency of storage along with transportation costs. In this paper, a thermodynamic analysis of DWTS wastes was conducted based on the isosteric heat and compensation theory. Different results concerning the mineralogical identification of sludges were established. Findings revealed that the by-product of water purification was mainly composed of aluminum, silica and iron hydroxides, with pH varying between 6.23 and 6.85. The suspended matter was between 18.3 and 19.6 m/l. The volatile matter of the three sludge samples was between 18 and 21%. The measured dry matter content was between 13.41 and 15.23%. The experimental tests were performed under temperatures from 45 and 60 °C, the experimental data of the sorption curves were fitted by using several models of correlation. Furthermore, the analysis showed that the Peleg’s model perfectly described the isotherm curves in the activities ranging from 0 to 90%. The net isosteric heats of sorption of the three hydroxide sludge from the Moroccan treatment station: $S_k$, $S_m$ and $S_s$, were determined for desorption and adsorption. Moreover, it was revealed that the equilibrium water content rising lead contributed to the reduction of the net isosteric heat and the entropy of sorption. Finally, the enthalpy-entropy compensation showed that the sorption mechanism involved was enthalpy driven.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 140-149
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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