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    Wyświetlanie 1-6 z 6
    Tytuł:
    Reverse osmosis as one-step wastewater treatment: a case study on groundwater pollution
    Autorzy:
    Ali, W.
    Rehman, W. U.
    Younas, M.
    Ahmad, M. I.
    Gul, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/779416.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    reverse osmosis (RO)
    membrane separation
    Total Dissolved Solids (TDS)
    Total Coliform
    E. Coli
    Opis:
    The present case study is focused on performance evaluation of a Reverse Osmosis (RO) membrane based pilot plant to treat the ground/surface drinking water sources polluted by flood, rivers and/or canals. The RO plant was designed, fabricated and then operated with polluted water. Two feed water samples having a TDS of 2.000 mg · L−1 and 10.000 mg · L−1 respectively, were taken and analyzed for physical, chemical and microbiological contaminants. The RO plant was run once through over a span of 100 hrs at an operating pressure of 15 bar. TDS rejections were found to be more than 94% while permeate flux was measured to be 25.82 L · m−2 · hr−1 to 40.55 L · m−2 · hr−1. Results show that RO plant has a potential to remove physical, chemical and microbiological contaminants like Total Coliform and E. Coli in one step.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 4; 42-48
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obrazowanie elektrooporowe warunków hydrogeologicznych strefy brzegowej wyspy Wolin
    Geoelectrical imaging of hydrogeological conditions of the coastal zone of Wolin Island
    Autorzy:
    Pacanowski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061773.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    metody geoelektryczne
    mineralizacja wód
    ingresja wód
    tomografia elektrooporowa
    ERT
    geoelectrical methods
    total dissolved solids (TDS)
    water ingress
    electrical resistivity tomography
    Opis:
    W artykule zaprezentowano problematykę złożonych warunków hydrogeologicznych w strefie brzegowej wyspy Wolin, które można obrazować za pomocą metod geoelektrycznych. Wody podziemne warstw wodonośnych strefy brzegowej znajdują się w stałym kontakcie z zasolonymi wodami morskimi. Fakt ten stanowi groźbę degradacji wód podziemnych i decyduje o specyfice ich ochrony. W utworach czwartorzędowych, na obszarach, gdzie wody podziemne wykazują niską mineralizację, wartości oporności utworów przepuszczalnych i nieprzepuszczalnych różnią się zdecydowanie, w związku z tym klasyfikacja hydrogeologiczna wyników, jakie otrzymujemy z pomiarów elektrooporowych nie stanowi problemu. Na obszarze prowadzonych badań sytuacja jest zupełnie inna i dużo bardziej skomplikowana, ze względu na ingresję słonych wód morskich do warstw wodonośnych. Co więcej, pośrednio mineralizacja ma również wpływ na oporności utworów słabo przepuszczalnych i praktycznie nieprzepuszczalnych.
    The article discusses the problem of complex hydrogeological conditions in the coastal zone of Wolin Island in Poland. Hydrogeological situation of the island was imaged by geoelectrical methods. Groundwater of the coastal zone is in constant contact with the saline sea waters. This fact constitutes a threat of groundwater degradation and has an influence on the methods of groundwater protection. The resistivity of Quaternary permeable and impermeable deposits is significantly different in areas where groundwater is characterized by low values of total dissolved solids (TDS). This implies that hydrogeological classification of the results obtained from electrical resistivity tomography (ERT) is not difficult. In the study area, the situation is completely opposite and much more complicated because of salty sea water ingress into aquifers. This affects the resistivity values of permeable and impermeable deposits, obtained from geophysical tests.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2016, 466; 225--232
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and Simulation Performance of a Reverse Osmosis Plant in the Al-Maqal Port
    Autorzy:
    Yousif, Yasameen T.
    Abbas, Abdulhussain A.
    Yaseen, Dina Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/2086424.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    reverse osmosis
    Iraq
    Basrah
    Shatt Al-Arab
    TDS
    total dissolved solids
    Winflows
    Opis:
    The Basrah province (southern of Iraq) was interested in establishing desalination plants to provide drinking water due to the high levels of salinity in its water resources. This work was carried out in order to evaluate and simulate the functionality of the reverse osmosis plant in the Al-Maqal port. From the field and laboratory measurement, this study concluded that the considered parameters of product water by reverse osmosis (RO) plant were within the Iraqi standard (IRS) limits. The calculation of operation indices showed that the recovery rate of plant (72%) and the permeate flux of plant (20 lmh) was within for limitation of brackish surface water. In turn, the plant has a low salt rejection (90.1%) and a high pressure drop (5 bar); therefore, the membranes require backwashing or chemical cleaning. Then, the performance of RO membrane was simulated by the Winflows software. The best operating parameters were identified. The coefficient of determination (R2) between simulated and measured TDS was 0.83. Therefore, the simulated TDS of permeate multiplied by 5.3 was given a good estimation for actual TDS within acceptable an error rate of 17%.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 5; 173--186
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quality assessment of 30 various brands of bottled drinking waters in Iran
    Autorzy:
    Mohsen, D.
    Saeid, N.
    Hajer, S.
    Pyrasteh, N
    Powiązania:
    https://bibliotekanauki.pl/articles/207768.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    TDS
    total dissolved solids
    bottled water
    quality water
    woda butelkowana
    jakość wody
    suma substancji rozpuszczonych
    Opis:
    During the last three decades bottled water consumption has become the fastest growing and most dynamic sector of all the food and beverage industries. In the study, physical, chemical and microbiological qualities of 30 different brands of bottled water were studied and compared with labeled values. Total hardness and pH values of bottled water were within acceptable range. Concentrations of trace and major chemical elements of all samples were within standard range. Nitrite concentration in all samples was close to zero. Only 6% and 20% of samples had respectively higher than acceptable values of fluorides and turbidity, respectively. Measured concentrations of sodium, calcium, magnesium, fluorides, nitrates, chlorides, pH and (TDS) were significantly different from labeled values on the samples. Twobrand bottles showed positive fecal coliform results while 16 brands of bottled water showed positive HPC results at 37 °C.
    Źródło:
    Environment Protection Engineering; 2016, 42, 4; 65-73
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Study of Produced Water Treatment Using Activated Carbon with Aluminum Oxide Nanoparticles, Nanofiltration and Reverse Osmosis Membranes
    Autorzy:
    Hussein, Mudhaffar Yacoub
    Al-Naemi, Amer Naji Ahmed
    AlJaberi, Forat Yasir
    Powiązania:
    https://bibliotekanauki.pl/articles/24201776.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    produced water
    wastewater treatment
    nanofiltration membrane
    reverse osmosis membrane
    TOC removal
    total organic compound
    TDS removal
    total dissolved solids
    reuse
    Opis:
    This work inspected the produced water discharged from the Amara oil field in (Misan-Iraq) to improve the quality of water before reuse and reinjection or disposal. The process of treatment included a pretreatment step using activated carbon and post-treatment using flat polymeric nanofiltration membrane (NF) (1.0 nm) and reverse osmosis membrane (RO) (0.3 nm), respectively. Therefore, activated carbon without aluminum oxide (Al2O3) nanoparticles and with (Al2O3) nanoparticles (20 nm) was used to examine the removal efficiency of the total organic compound (TOC). The height of the fixed bed of activated carbon and its diameter were 35 cm and 2.5 cm, respectively. The volumetric flow rates of the produced water flowing through the activated carbon column were taken as (25, 20, 15, 10 and 5)×10-4 m3/h respectively, at transmembrane pressure (TMP) of 1.0 bar, pH equals 6, and the temperature of 25 °C. The TOC removal efficiencies attained using activated carbon without Al2O3 nanoparticles were (52, 64, 77, 83 and 87%), respectively, and (65, 72.7, 83.4, 92.5 and 95.2%) with the use of Al2O3 nanoparticles, respectively. Produced water effluent from the activated carbon column was treated by flat NF and RO membranes to reduce the total dissolved solids (TDS). The cross-flow rates through NF and RO membranes were 0.1 and 0.25 m3/h, TMP (1–12 bar) and 60 bar, respectively. The removal efficiency of TDS was enhanced up to 40% and 99.67%, respectively. In addition, the TOC removal efficiency was 100% in the effluent of the RO membrane.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 5; 78--87
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of a Solar Powered Reverse Osmosis System in Egypt
    Autorzy:
    Ibrahim, Said M. A.
    Shabak, Ahmed G. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2052247.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    reverse osmosis
    photovoltaic
    total dissolved solids
    TDS
    pvro
    desalination
    odwrócona osmoza
    fotowoltaika
    całkowita ilość rozpuszczonych w płynie substancji
    odsalanie
    Opis:
    Scarcity of fresh water, forced many countries to get their water needs, or part of it, by means of saline water desalination. Reverse osmosis (RO) systems are useful tools in this concern. In case the grid electricity is not available or costly, photovoltaic (PV) power is necessary to derive RO systems. The present paper is concerned with providing a methodology for complete sizing and design of a photovoltaic reverse osmosis (PVRO) system in Egypt. Egypt has very favorable solar energy. A computer program was constructed to solve the mathematical equations of the model to get the numerical values. The program is capable of calculating the solar irradiation for any city in Egypt. Calculations and selection of the RO system with all connected pumps, the peak PV power needed, and the actual PV area were performed for different water demands ranging from 1-100 m3/day, and various water total dissolved solids (TDSs) of 5000, 15000, and 30000 mg/l. The cost of the complete PVRO system was also determined. The concern of the paper is related to water desalination and solar energy, which are responsible for our existence. The work also aims toward sustainable and clean environment via utilizing solar energy.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2021, 5, 2; 125-140
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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