Temat: reverse osmosis - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Quality of Leachate From Landfill with Reverse Osmosis Concentrate Recirculation
Autorzy:: Tałałaj, Izabela Anna
Tematy:: landfilling
leachate
concentrate recirculation
reverse osmosis; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/124364.pdf Link otwiera się w nowym oknie
Opis:: The purpose of this study was to determine the changes of leachate quality on a selected municipal landfill with recirculation of concentrate from the reverse osmosis (RO) process. The research was carried out on an exploited municipal waste landfill, from which the samples of leachate, permeate and concentrate were collected in the years 2013-2015. The obtained samples were subjected to the physicochemical analysis, including the determination of general pollution parameters as well as organic and inorganic indicators. The obtained results showed that the concentrate recirculation resulted in intensification of the degradation processes in the waste body, expressed by the increase of biodegradability rate (BOD₅/COD) and the value of conductivity and dissolved solids. Over time, the value of conductivity and dissolved solids stabilized; however, they reached the values higher than in conventional landfills. A characteristic feature of the long-recirculation landfills was a continuous increase in the concentration of ammonia nitrogen and COD values in the leachate.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optimal Design of a Hybrid Renewable Power System for a Reverse Osmosis Desalination Plant in Jordan
Autorzy:: Ababneh, Sara N.
Al-Odat, Mohammad
Tematy:: water desalination
reverse osmosis
hybrid renewable; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114355.pdf Link otwiera się w nowym oknie
Opis:: The aim of this investigation is to assess the feasibility and benefits of integrating a renewable energy system into a seawater reverse osmosis (SWRO) desalination station in Aqaba, Jordan. It has been determined that the optimal SWRO system configuration produce 109,500.00 m3 daily fresh-water output with high rejection rates for various contaminants. The total water cost is 0.85 $/m3, with a specific energy consumption of 2.67 kWh/m3. Furthermore, the economic and environmental assessments of optimum design of the wind-diesel generator-battery. This conf iguration not only offers the lowest cost of energy but also demonstrates a substantial renewable fraction and significant reduction in CO2 emissions. These results underscore the feasibility and benefits of integrating renewable energy into desalination operations, contributing to both economic sustainability and environmental preservation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: RO Reject Water Management Techniques
Autorzy:: Kumar, Navin
Bharadwaj, Vidushi
Mitra, Shikha
Bose, Debajyoti
Tematy:: passive oxidation
phytoremediation
reverse osmosis
water treatment; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1113586.pdf Link otwiera się w nowym oknie
Opis:: In the last five decades, the variation for increase in population and decrease in available clean water is noticeable. To meet with growing water requirements, along with the wastewater from municipal sewage treatment plants, it is critical to consider the reuse of industrial wastewater wherever possible. In the Indian context, this has already been started in some of the big industries, especially in metro cities and it must be implemented at all level possible industries. Ultrafiltration (UF), reverse-osmosis (RO) and membrane bioreactors (MBR) will be integral parts of this. Waste water reuse is not only a necessity, it also provides several eco-friendly benefits.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Development of Resource-Saving Technologies in the Use of Sedimentation Inhibitors for Reverse Osmosis Installations
Autorzy:: Trus, Inna
Gomelya, Mukola
Skiba, Margarita
Pylypenko, Tetiana
Krysenko, Tamara
Tematy:: reverse osmosis
concentrate
membrane
permeate
productivity
selectivity
antiscalant; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2025383.pdf Link otwiera się w nowym oknie
Opis:: The processes of desalination of weakly mineralized waters using a reverse osmosis membrane were studied. The operational efficiency of membranes is limited mainly by membrane contamination. It was shown that the preliminary mechanical water purification helps to increase the productivity and selectivity of the membrane. One of the main causes of membrane contamination is the formation of carbonate deposits on their surface. One way to prevent membrane contamination is to dose antiscalants. It was established that the use of hydrolyzed polyacrylonitrile (HPAN) and hydrolyzed polyacrylamide (HPAA) as a stabilizer of scale formation is effective for concentrates of reverse osmosis desalination of water.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Recovery of the Properties of Spent Commercial Reverse Osmosis Membrane Elements and Ways of their Reuse
Autorzy:: Tyvonenko, Artem
Ivanova, Tetiana
Halkina, Kateryna
Mitchenko, Tetiana
Vasilyuk, Sergey
Kosogina, Iryna
Tematy:: reverse osmosis
regeneration
modification
reuse
plastic waste
environment; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114432.pdf Link otwiera się w nowym oknie
Opis:: In connection with the rapidly growing market of reverse osmosis membrane elements, particularly those intended for use in commercial water treatment installations, the problem of their regeneration and reuse has become acute. Today, the service life of such elements does not exceed 6–12 months, after which they turn into plastic waste and end up in landfills in the amount of no less than 60.000 tons per year, which leads to the emergence of serious environmental problems. This paper proposes methods and conditions for achieving almost complete restoration of the properties of used commercial reverse osmosis membrane elements by means of their regeneration and modif ication. The possibility of using restored elements in vending machines for filling safe physiologically complete drinking water has been demonstrated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of modified coal through chemical activation process on performance of heterogeneous reverse osmosis membranes
Autorzy:: Thaçi, B.
Gashi, S.
Daci, N.
Daci, M.
Dylhasi, A.
Tematy:: chemical activation
coal
membranes
reverse osmosis
wastewater treatment
reverse osmosis treatment
aktywacja chemiczna
węgiel
membrany
odwrócona osmoza
oczyszczanie ścieków przemysłowych; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/207269.pdf Link otwiera się w nowym oknie
Opis:: Heterogeneous reverse osmosis (RO) membranes have been prepared from cellulose acetate (CA) and modified coal through chemical activation. Nitric acid of various concentrations, sulfuric and acetic acids used for various time periods have been studied with respect to modification of structure of coal and consequently structure of RO membranes. The effect of these variables on the modification of coal was examined by IR spectroscopy. All membranes prepared in such a way showed improved performance in comparison with standard CA membranes. The volume flux of the best RO membranes at 94% level of solute separation was 3.87×10–2 m3/(m2·h) at 1.76 MPa using aqueous feed solution 400 mg/dm3 of sodium chloride. The performance improvement was related to increases of charge of groups of coal particles in the membrane, affecting their rheology and morphology resulting in better membrane productivity. The SEM of some membranes have also been presented. These membranes were tested also with 1:1, 1:2, 2:2 and 1:3 inorganic salt solutions. The agreement between the calculated and experimental data of solute separation for studied solutes was reasonably good.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Assessment of the Pressure Driven Membrane for the Potential Removal of Aniline from Wastewater
Autorzy:: Salih, Miqat Hasan
Al-Yaqoobi, Atheer M.
Hassan, Hassanain A.
Al-Alawy, Ahmed Faiq
Tematy:: nanofiltration
reverse osmosis
aniline
organic fouling
low pressure; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114085.pdf Link otwiera się w nowym oknie
Opis:: The vast utilizing of aniline in diverse industrial applications makes it predominantly recognized in the eco-geological system. This work investigated the feasibility of reverse osmosis (RO) and nanofiltration (NF) membranes for the removing of aniline from wastewater. The performance of the TFC spiral wound membrane was examined with different operating parameters. The effect of feed concentration (10–200 mg/l) and operating pressure (1–4 bar) on flux and aniline rejection were explored. Additionally, the fouling test for the adopted membranes was conducted for 20 h using NaOH as cleaning agent. The results revealed that a high rejection ratio at noticeable low operation pressure was achieved by using TFC membranes for both of the RO and NF technologies. The maximum aniline rejection was 99.8% and 93.25% under a 1 bar pressure and the concentration of feed 10 mg/l for the RO and NF membranes, respectively. These rejection ratios correspond to the permissible concentration of aniline in the wastewater. The water flux obtained was 6.33 and 13.5 LMH for reverse osmosis and nanofiltration membranes, respectively. The augmentation of operation pressure resulted in decreasing of rejection and rising of the flux. The fouling test showed a reduction in flux of about 0.92 and 4.35% for RO and NF membranes, respectively, from its initial value before membrane cleaning. The results also demonstrated that the reverse osmosis membrane is better than the nanofiltration membrane in terms of removal efficiency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The performance assessment of reverse osmosis stations at Al-Mahalabea area
Autorzy:: Ahmed, Mohammed F.
Tematy:: brackish water
desalination
membrane technology
reverse osmosis
SAW
TOPSIS; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Powiązania:: https://bibliotekanauki.pl/articles/118750.pdf Link otwiera się w nowym oknie
Opis:: The present study assesses RO stations at four sites in Al-Mahalabea area – Nineveh governorate, Iraq during the summer of 2013. The performance of RO stations are ranked by two methods: the Simple Additive Weight (SAW) and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). Two groups of samples were collected from feed and permeate water for two periods (at zero time of operation and after ten weeks of operation) with eleven parameters for each sample were analysed. The highest overall rejection R efficiency appeared with the first set of parameters more than 90% (SO4, TDS, NO3, TH, and turbidity), while the second set was the least (Cl, Na, and total alkalinity – TA) ranged between 65 and 85%. It is observed that both the SAW and the TOPSIS methods are accurate to predict the performance efficiency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparative Analysis of the Effectiveness of Reverse Osmosis and Ultraviolet Radiation of Water Treatment
Autorzy:: Dirisu, Gabriel B.
Okonkwo, Ugochukwu C.
Okokpujie, Imhade P.
Fayomi, Ojo S.I.
Tematy:: water treatment
water treatment techniques
ultraviolet radiation
reverse osmosis; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/125109.pdf Link otwiera się w nowym oknie
Opis:: Water contamination and pollution pose health hazards to humanity and hence the need for their treatment. This study compared reverse osmosis (RO) and ultra-violet (UV) radiation in treating borehole water (BHW) and surface water (SW). The study area is Omoku community in Rivers State of Nigeria. The RO- and UV-treated waters were determined by their physicochemical characteristics and total Coliform, with the control to check the impact of each one. The obtained results showed slight variations, which were either significant or not. The pH of the treated BHW was slightly acidic with the value of 6.52. Water conductivity ranged from 40.33 µs/cm³ to 42.40 µs/cm³ for the BHW treated with RO, UV and control samples, respectively. SW conductivity attained a range of 425.07–800.0 µs/cm³. Turbidity of BHW were beyond the detectable limit but was higher than the WHO limit of <5.00NTU, while total suspended solid (TSS) of SW ranged from 9.08–46.43 ppm. Total dissolved solids (TDS) values of water were between 3.50 ppm and 16.67 ppm for RO treated BHW and higher than that of SW. There was a reduction of salinity of BHW from 40.7 mg/l to 11.8 and 21.6 mg/l following RO and UV treatment, while SW salinity was also reduced from 75.0 mg/l to 20 mg/l in RO treated water and 16 mg/l in UV treated water. In this study, RO and UV water treatment proved to be effective in producing potable water from both BHW and SW, although RO seemed to produce water with reduced mineral content in comparison to the UV treatment. Both methods effectively reduced heavy metals as well as Coliform. The physicochemical parameters tested were below the WHO recommended limits in most cases. It is recommended that both methods be incorporated in a single WT in order to gain the benefits of both technologies.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Speciation of arsenic in groundwater and technologies for removal of arsenic in drinking water in the spiro tunnel bulkhead, Park City, Utah, USA
Autorzy:: Pawlak, Z.
Rabiega, G.
Scanlan, L.
Cartwright, P.
Tematy:: arsenic speciation
reverse osmosis treatment
coagulation filtration treatment
water treatment; Pokaż więcej
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Powiązania:: https://bibliotekanauki.pl/articles/347045.pdf Link otwiera się w nowym oknie
Opis:: Application of an anion exchange resin column was performed to speciate of arsenic (III) and (V) in drinking water. This methodology was used to analyze water samples collectioned from the study of arsenic removal by two technologies, reverse osmosis membrane filtration and chemical coagulation/ filtration in pilot scale in anticipation of EPA=s new arsenic drinking water standard of 10 µg/L takes effect 2006. This EPA treatment technology project was to collect data on the performance of two existing water treatment processes to remove arsenic on pilot scale. Total arsenic concentrations were reduced by reverse osmosis from an average 60 µg/L in the source water to less than 1 µg/L, and chemical coagulation reduced total arsenic from an average 60 µg/L to 4 µg/L. The work reported here will focus on obtaining accurate readings for arsenic valence states (III) and (V), given the Edwards [17] method for arsenic speciation. Separation of arsenic As(III) and As(V) by speciation in field samples, was performed using an anion exchange resin column. The chloride interferences that affect the determination of 75Arsenic from chloride (35 isotope) molecular species (40Ar35Cl), were corrected using chloride measurements in all samples using equation: [75As(corr)] = [75As] - 3.127 × {[40Ar37Cl] - 0.815 [82Se]}. The use of sulfuric acid in the preservation procedure created interferences with ICP-MS in the range one ěg/L of arsenic. The problem of interference in determination of isotope 75As is due to sulfur 34S isotope which is present in sulfate. The (34S isotope, 4.21%) forms the polyatomic species (mass 75) (40Ar34S1H) and species (mass 74) (40Ar34S) which interferes with the determination of 75As isotope. The method detection limit, MDL, for arsenic for ICP-MS was determined to be 0.1 µg/L. Our spiked matrix recoveries, spiked blank samples, and reference materials deviate only a few percents from the listed true values.
Dostawca treści:: Biblioteka Nauki

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