Reverse osmosis/ultra filtration process principles

1986 ◽  
Vol 41 (9) ◽  
pp. 2453-2454
Author(s):  
P. Meares
Keyword(s):  
Reverse Osmosis ◽  
Filtration Process ◽  
Ultra Filtration

Synthesis, characterization and application of anionic metal complex azo dyes as potential substitutes for Cr-complex dyes

2014 ◽  
Vol 84 (19) ◽  
pp. 2036-2044 ◽  
Author(s):  
Zarkogianni Maria ◽  
Eleftheriadis Ioannis ◽  
Nikolaidis Nikolaos ◽  
Tsasaroni Eforia
Keyword(s):  
Metal Complex ◽  
Azo Dyes ◽  
Synthesis And Characterization ◽  
Fastness Properties ◽  
Drastic Reduction ◽  
Filtration Process ◽  
Lower Toxicity ◽  
Ultra Filtration ◽  
Free Metal

The synthesis and characterization of Cu-, Al-, Zn-, Ni-, Mn- complexes as substitutes for the Cr- and Co-complex acid azo dyes with lower toxicity was carried out and the subsequent use of ultra-filtration was studied with the aim of purifying the metal complex dyes and thus increasing dye strength and solubility and additionally reducing the free metal present in the final dye. A drastic reduction in the content of inorganic additives and free metal was achieved by the ultra-filtration process. The ultra-filtrated and non-ultra-filtrated dyes were used to dye wool and nylon fabrics. Color measurements and fastness properties were performed on the dyeings produced on wool and polyamide and compared with the Cr-complex dyeing, thus examining the possibility of using successfully these complex dyes as possible replacement of the Cr- and Co-complex dyes.

Effect of Two Stages Adsorption as Pre-Treatment of Natural Organic Matter Removal in Ultrafiltration Process for Peat Water Treatment

2020 ◽  
Vol 988 ◽  
pp. 114-121 ◽  
Author(s):  
Mahmud ◽  
Muthia Elma ◽  
Erdina Lulu Atika Rampun ◽  
Aulia Rahma ◽  
Amalia Enggar Pratiwi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Membrane Fouling ◽  
Optimum Dose ◽  
Operating Pressure ◽  
Filtration Process ◽  
Dead End ◽  
Ultra Filtration ◽  
Pre Treatment ◽  
Two Stages

Natural Organic Matter (NOM) content in peat water is a major problem of membrane fouling in ultrafiltration (UF). For that, two stages adsorption as pre-treatment was employed to minimize the membrane fouling of NOM content. This research was carried out to investigate the effect of two stages adsorption on ultrafiltration performance for NOM removal that remains in peat water. This method was using powdered activated carbon (PAC) dosage of 80, 160, 240, 320, 400, 480, 560, 640, 720, 800, 880 dan 960 mg.L-1. Then, Polysulfone (Psf) material was employed for Ultra filtration process. Membrane was applied in a dead-end mode with various operating pressure (1; 1.5; 2; 2.5; 3 bar). As a results, the optimum dose of PAC was 800 mg L-1 with dosage ratio of 3/4:1/4. Two stages adsorption-UF PSf provided the range from 86.9 to 92.8% of KMnO4 and 74.1-88.1% of UV254. For the experimental condition of 3 bar, the highest flux was achieved up to 39.919 L h-1.m-2.

Chemical Quality of Raw Milk Retentate processed by Ultra-filtration or Reverse Osmosis at the Dairy Farm

2015 ◽  
Vol 69 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Ida Sørensen ◽  
Søren Jensen ◽  
Niels Ottosen ◽  
Tommas Neve ◽  
Lars Wiking
Keyword(s):  
Reverse Osmosis ◽  
Dairy Farm ◽  
Raw Milk ◽  
Chemical Quality ◽  
Ultra Filtration

Reuse and recycling of secondary effluents in refineries employing advanced multi-barrier systems

2010 ◽  
Vol 62 (8) ◽  
pp. 1813-1820 ◽  
Author(s):  
J. Lahnsteiner ◽  
R. Mittal
Keyword(s):  
Reverse Osmosis ◽  
Reclaimed Water ◽  
Price Policy ◽  
Critical Parameters ◽  
Raw Water ◽  
Excellent Performance ◽  
Legal Requirements ◽  
Water Composition ◽  
Secondary Effluents ◽  
Ultra Filtration

In this paper the reclamation and reuse of municipal secondary effluents, as well as the reclamation and recycling of refinery secondary effluents, are technically and economically evaluated. It is shown that both practices are feasible and sustainable, and that the reclamation costs depend largely on specific circumstances such as legal requirements, price policy, reuse application, raw water composition, etc. The reclaimed water is reused, or respectively recycled, as boiler make-up. Therefore both reclamation plants employ advanced multi-barrier systems including ultra-filtration and reverse osmosis. The employed processes have shown excellent performance with regard to the removal of critical parameters such as silica. For example, this parameter was reduced from 13 mg/l in the raw water to 7 μg/l in the boiler make-up.

Surface Modification of Composite Membranes by Coating PVA/TiO2 Layer

2015 ◽  
Vol 804 ◽  
pp. 299-303
Author(s):  
Baturalp Yalcinkaya ◽  
Jiri Chaloupek
Keyword(s):  
Waste Water ◽  
Reverse Osmosis ◽  
Metal Ion ◽  
Sea Water ◽  
Composite Membranes ◽  
Aluminum Production ◽  
Filtration Process ◽  
Ion Rejection ◽  
Reverse Osmosis Membranes

Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of waste water from aluminum production industry were obtained during filtration process by using modified commercial composite membranes. Amount of fouling was evaluated with unmodified and modified membranes. Rejection of iron particles and PH of feed and permeate solutions were determined after filtration process. Results shows that modified membranes were performed higher metal ion rejection and antifouling performance than unmodified membranes.

scholarly journals Novel Integrated Ultrafiltration and Reverse Osmosis System in High Quality Drinking water Production

2020 ◽  
Vol 36 (6) ◽  
pp. 1243-1247
Author(s):  
Vinod Kumar S ◽  
R Baskaran
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
Concentration Polarization ◽  
Integrated System ◽  
Quality Analysis ◽  
Water Contaminants ◽  
Quality Of Water ◽  
Ultra Filtration ◽  
Drinking Water Production

Modernization in water technology plays a major role in ensuring a clean, safe, and feasible supply of drinking water. Enhancing performance in terms of price and quality, flow ability of the plant, sustainable development; integrated membrane processes have been developed. The most crucial issues found in RO applications such as concentration polarization and membranes fouling are reduced by using this integration of membranes. Conventional reverse osmosis filtration has sand and coke filters as pre filters. In this work these pre filters have been replaced by ultra-filtration which ensures undoubtedly the best quality of water despite the quality of feed with low power consumption and chemicals. These integrated systems are the better thing for complete elimination of microorganism and water contaminants in their category of selection. The present work also contributes on water quality analysis for brackish water using both the above desalination membrane technology. This integrated system can be remotely monitored and self-adapted model-based control.

Sign in / Sign up

Export Citation Format

Share Document