reverse osmosis membrane Articles
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Intrinsic properties and performances of NF270 and XLE membranes for water filtration
Nanofiltration and low pressure reverse osmosis membranes are well-known in the field of drinking water production and their separation performance is very strongly related to their intrinsic characteristics. The membrane characterization (scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential …) was realized on a NF270 and extra-low energy (XLE) membrane. SEM results ...
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VSEP helps Shanghai automotive factory achieve a 100X reduction in C.O.D.
The wastewater from the production of automotive parts can be difficult to treat due to its varied chemical composition. This type of wastewater contains high levels of COD that need to be reduced to meet local sewer specifications. The typical treatment scheme could consist of chemical treatment followed by a lot of pre-treatment steps and eventually a reverse osmosis membrane system. This type ...
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Before Using Reverse Osmosis Membranes, We must Pay Attention to these Six Points
1. Influent pressure Influent pressure will affect the flux and desalination rate of reverse osmosis membranes. The permeability increases with the increase of influent pressure. Because reverse osmosis membranes can not absolutely intercept dissolved salts in the water, there is always a certain amount of permeation with the increase of pressure, because the permeation rate of the membranes is ...
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Disc-tube Reverse osmosis membrane
Technical Parameters:1. Membrane module area: 9.405m2/pc 2. Feed flow range(per module): 2m2/h max, 0.8m2/h min 3. pH range: 3-10 (2-13 when cleaning) 4. Temperature range: 45ºC max (If the equipment is required to operate at 70?, high-temperature type disc are required) 5. Weight: Dry weight 65kg 6. Pressure grade: 75bar, 90bar, 120bar, 160bar, 200barWe are committed to providing a comprehensive ...
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Samyang WS PU(Water Solution) participate in InterAqua 2024
Samyangsa WS PU participated in the water treatment exhibition 'InterAqua 2024' held at Tokyo Big Sight in Japan from January 31 to February 2. InterAqua 2024 is Japan's largest international water treatment exhibition, which has more than 130 water treatment companies take part, and Samyang WS PU actively promoted ion resin for semiconductors, reverse osmosis membrane, and EDI (electrolytic ion ...
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Reverse Osmosis System Design
Reverse Osmosis (R.O.) is currently used in various applications ranging from small under the sink drinking water systems to large municipal drinking water applications. The technology is widely used and accepted as it removes both dissolved ionic and organic impurities. This article will focus on the application of reverse osmosis membranes and discuss factors that should be considered for ...
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Membrane Free Volume Characterization
Free Volume in Reverse Osmosis Membrane Reverse Osmosis (RO) is the leading technique for water desalination. RO membranes have been optimized over the past three decades. Typically, commerical RO membranes can produce drinking water from seawater. Water and salt transport through RO membrane follows the so-called Solution-Diffusion Model. Particularly, during separation, water and salt ...
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Heshan Leachate Treatment Project
Capacity:70m³/d, containerized leachate treatment equipment (double stages DTRO)Influent water quality:SS≤500mg/LpH: 6-9COD≤10000mg/LBOD≤5000mg/LNH3-N≤2000mg/LTN≤2500mg/LTotal Hardness(CaCO3)≤1200mg/LTotal Alkalinity(CaCO3)≤8000mg/LSiO2≤50mg/LEffluent water quality and discharge standard:SS≤30mg/L COD≤100mg/LBOD≤30mg/LNH3-N≤25mg/LTN≤400mg/LJiarong containerized leachate treatment equipment is ...
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Disc-tube Reverse Osmosis Membrane for Leachate treatment
Technical Parameters: 1. Membrane module area: 9.405m2/pc 2. Feed flow range(per module): 2m2/h max, 0.8m2/h min 3. pH range: 3-10 (2-13 when cleaning) 4. Temperature range: 45ºC max (If the equipment is required to operate at 70?, high-temperature type disc are required) 5. Weight: Dry weight 65kg 6. Pressure grade: 75bar, 90bar, 120bar, 160bar, 200bar We are committed to providing a ...
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Occurrence of N-nitrosodimethylamine precursors in wastewater treatment plant effluent and their fate during ultrafiltration-reverse osmosis membrane treatment
The formation of N-nitrosodimethylamine (NDMA) is of major concern among wastewater recycling utilities practicing disinfection with chloramines. The NDMA formation potential (FP) test is a simple and straightforward method to evaluate NDMA precursor concentrations in waters. In this paper we show the NDMA FP results of a range of tertiary wastewater treatment plants that are also the source for ...
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Guangzhou Fengshun WastewaterTreatment Project
Capacity: 200tons/day Process: Containerized Leachate Treatment Equipment (2 stages DTRO) Influent water quality: pH 8.3 SS≤150mg/L COD≤2720mg/L NH3-N≤900mg/L TN≤925mg/L Conductivity: 19500us/cm Effluent water quality/Discharge standard BOD5≤20mg/L CODcr≤90mg/L NH3-N≤10mg/L TN≤40mg/L SS≤30mg/L Jiarong containerized leachate treatment equipment is based on a two-stage ...
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Study of the optimization factors for preparation of heterogeneous reverse osmosis membranes
The influence of the preparation factors such as casting solution composition, different methods of coal modification, evaporation time of solvent and their optimization on performance of cellulose acetate heterogeneous reverse osmosis membranes have been studied. Three types of membranes were made from a blend of cellulose acetate (CA) and coal by weight ratios 1:1.5, 1:1.75 and 1:2. The ...
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Enhanced flux performance of polyamide composite membranes prepared via interfacial polymerization assisted with ethyl formate
A novel thin film composite (TFC) polyamide reverse osmosis membrane was prepared via the interfacial polymerization of m-phenylene diamine (MPD) in aqueous phase and 1,3,5-trimesoyl chloride (TMC) in organic phase on a polysulfone ultrafiltration support by assisting with ethyl formate as a co-solvent added in the organic phase. The ethyl formate added in the organic phase is intended to ...
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Wastewater Treatment Water Purification Equipment
Jiarong containerized leachate treatment equipment is based on a two-stage DTRO disc tube reverse osmosis membrane, which is mainly designed for high concentration and difficult sewage treatment such as landfill leachate.The containerized system is particularly effective for leachate treatment and is a popular choice among customers, as it is ideal for long-distance transportation with ...
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DTRO Leachate Treatment Equipment
Introduction Jiarong containerized leachate treatment equipment is based on a two-stage DTRO disc-tube reverse osmosis membrane, which is mainly designed for high concentration and difficult sewage treatment such as landfill leachate. The containerized system is particularly effective for leachate treatment and is a popular choice among customers, as it is ideal for long-distance transportation ...
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Chloride reduction through reverse osmosis - Vietnam, 500 m3/d - Case Study
Project Description: Lenntech has engineered, manufactured and assembled a water desalination system for a medium brackish water source in order to reduce the chloride content of the raw water intake. The system is installed in the Socialist Republic of Vietnam. The water desalination system is equipped with top brand instrumentation and equipment. The system is completely from European origin ...
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Spiral-tube Reverse Osmosis Membrane for Leachate Treatment
ST MEMBRANE INTRODUCTION ST membrane technology is a new structural membrane module specially developed for leachate and high salt wastewater treatment, which adopts spiral membrane structure, and the membrane adopts industrial anti-pollution RO membrane or NF membrane, and the grid channel adopts parallel grid structure which is different from the general spiral membrane, so that it can be used ...
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Theoretical and practical experience of calcium phosphate inhibition in RO waters
The increasing trend over the last ten years to use waste water as a feed source for reverse osmosis membrane plant has resulted in an increase in calcium phosphate scaling on membrane surfaces. This is due to much higher levels of phosphate in waste water typically 10-30 mg/l as compared with a groundwater source which may have only 1-5 mg/l of phosphate. These higher phosphate levels resulting ...
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Alternative water supply and treatment solutions in Durban (SA)
As a result of persistent drought conditions in South Africa a customer (an international consumer goods producer with a production facility in Durban) experiences the pressure of limited availability of water. The ever dropping dam levels currently result in higher risk for intermittent water supply resulting in unplanned and forced production stops in case no water is available. Aquest Colsen ...
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RO Membrane Technology
RO membrane technology is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property, that is driven by chemical potential differences of the solvent, a thermodynamic parameter. The reverse osmosis membrane technology can ...
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