Showing results for: reverse osmosis membrane Articles
-
Guangdong Yangxi Power Plant Desulfurization Wastewater Treatment Project
Processing scale: 48 tons/hour Treatment process: DTRO + STRO Project features: The project adopts DT&ST integrated high-density concentration process, with less concentrate production, low operating cost, investment cost 15% lower than the full DTRO process, and high system reliability. Jiarong- headquartered in Xiamen, China- was founded in 2005. We are a specialist in industrial ...
-
Operating Electrodeionization in a High-Silica Feedwater Environment
High silica feedwaters pose two challenges for ultrapure water membrane systems. On the front end, silica can scale the RO membranes, limiting use of some feedwaters and high water recovery. On the back end, silica can scale the IX resins in the electrodeionization (EDI). It is also a challenge to attain the very low ppb levels of silica in the ultrapure product water required by power and ...
-
Electrodeionización Para Generación de Energía y Farmacéutica
In México, EDI (Electrodeionización) is used to produce pure and ultrapure water for both Generación de Energía y Farmacéutica (USP PW y WFI). The challenge for pure and ultrapure water in Mexico is the silica level. SnowPure works in México with OEMs to choose technologies and processes that will enable good performance and long life for RO (OI) and EDI ...
-
Factors that Affect the Performance of Reverse Osmosis Membrane Filters
Water treatment facilities worldwide use Reverse Osmosis (RO) to remove contaminants from municipal and private water supplies. While RO systems consist of multiple components, including pre-filters, UV sterilisation systems, pumps, flow meters, and interconnecting pipework, the decontamination process depends on membrane filters to remove contaminants. Membrane filters trap dissolved solids, ...
-
Results from 99 seawater ro membrane autopsies
Abstract This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors discuss historical results of membrane autopsies and link recent trends and changes in plant design to potential fouling and scaling issues ...
-
Impact of elevated Ca2+/Mg2+ concentrations of reverse osmosis membrane desalinated seawater on the stability of water pipe materials
Hardness and alkalinity are known factors influencing the chemical stability of desalinated water. This study was carried out to investigate the effect of Ca2+ and Mg2+ on corrosion and/or scale formation on the surface of different water distribution pipe materials under tropical conditions. The corrosion rates of ductile iron, cast iron and cement-lined ductile iron coupons were ...
-
Electronic Water Treatment Reduces Fouling In Reverse Osmosis
Reverse Osmosis (RO) is used in processes requiring high-quality, purified water, such in semi-conductor processing or biochemical applications and can be used to treat boiler feed water, industrial wastewater or process water. A water purification technique, it reduces the quantity of dissolved solids in solution. RO uses waterline pressure together with energy consuming pressurizing pumps that ...
-
Red Rock Correctional Facility, Arizona - Case Study
In 2013, AdEdge Water Technologies was contacted by Valentine Engineering to participate in a design/build project that was ongoing at the Red Rock Correctional Facility in Eloy, Arizona. CCA is the parent company and is an operator of privately owned and operated prisons throughout the United States. CCA signed an agreement with the State of Arizona to administer up to 1,500 prisoners at the Red ...
-
Data normalization identifies performance issues - Case Study
Introduction The Municipal RO Plant had been in operation for almost 18 years, producing ~290 gpm of permeate water for a city in Iowa, USA. It was one of the first RO plants in the state and the upper mid-west. In May 2008, city operators complained about a loss in system production. In response, the City contracted an RO membrane service provider to perform a cleaning regimen that produced less ...
-
Evaluation of a bench-scale membrane fouling protocol to determine fouling propensities of membranes during full-scale water reuse applications
There is increasing interest in recycling wastewater effluents for augmentation of existing water supplies. The treatment of wastewater effluents by an integrated membrane system, such as microfiltration pre-treatment followed by reverse osmosis, is the industry standard for groundwater recharge or reservoir augmentation projects. Membrane fouling, especially effluent organic matter fouling, is a ...
-
Analyses of calcium carbonate scale deposition on four RO membranes under a seawater desalination condition
Inorganic fouling is one of the critical operational issues in reverse osmosis membrane. Few researches investigated effects of membrane surface characteristics on inorganic fouling and on anti-scaling techniques although the fouling occurs on the membrane surface. The objective of this paper was to examine whether different characteristics of deposition of calcium carbonate solids would occur on ...
-
Short- and long-term fouling characteristics of reverse osmosis membrane at full scale leachate treatment plant
This research is focused on characterizing the foulants on a reverse osmosis (RO) membrane taken from a full-scale leachate treatment plant in Thailand. The system consists of a physico-chemical pre-treatment unit and RO system and has been in operation for 2 years. Ferric chloride (FeCl3) was added to the open-jet sedimentation tank at 2.0–2.5 g/l dosage for chemical coagulation. The supernatant ...
-
Maximizing membrane life: lessons learned from a three year study on performance recovery
Abstract Reverse Osmosis (RO) membranes are susceptible to several different types of foulants and scales. Common foulants observed in RO systems are organics, metals, clays and colloidal material. Common scales that are observed are carbonate, phosphate, sulfate and silica. Onsite cleaning is the norm to remove these foulants and scales but sometimes a desire for cleaning optimization or a ...
-
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 ...
-
Research papers: safe use of Microbubbles for removal of RO Membrane Fouling - Case Study
For full downloadable report Abstract The authors have shown a dramatic improvement in cleaning efficiency when effervescent cleaning reagents are used in conjunction with bubbles created using a specially designed microbubble generator. One potential problem associated with this new technique is that the bubbles will cause damage to the delicate polyamide layer and other structures in ...
-
Advancements in Scaling Calculations and an in depth look at Antiscalant dosing for stressed waters and high recovery systems
Abstract Over the past few decades the Reverse Osmosis (RO) industry has observed an increase in applications in challenging waters. Water sources that were never considered suitable for RO are now commonplace, including municipal waste streams, industrial waste, and even mining waste. Furthermore, regulatory restrictions, environmental obligations, solid waste expenses, and water supply ...
-
Evaluation of the low pressure RO and NF membranes for an alternative tyreatment of Buyukcekmece Lake
The recent development of new generation LPRO and LPNF membranes has received attention for application in the field of wastewater and water treatment through an increasingly stringent regulation for drinking water purposes and water reclamation. This paper presents the pilot scale membrane separation studies on Buyukcekmece Lake in Istanbul with low pressure reverse osmosis (LPRO) and low ...
-
Importance of Pretreatment for Industrial Reverse Osmosis
Your body is a machine. Like most machines, you have to properly maintain your body in order for it to function properly. Along with regular cleaning and checkups, you also have to be cognizant of what food you put into your body or else it won’t work at its maximum potential. An industrial reverse osmosis water treatment system actually works in quite a similar way. Regular cleaning and ...
-
Electronic Water Treatment - An alternative solution to removing beerstone and limescale
Beer contains 90% water and is the most important ingredient in determining its flavor. Water contains calcium and is the most important mineral to the brewing process. The levels of calcium in local water have determined the type of beer produced. The different types of beer whether a light lager or a porter are for the most part due to the water profiles of the areas that made the styles ...
-
An evaluation of MBR and conventional pretreatment for reverse osmosis for water reclamation
Two wastewater polishing systems were compared in terms of their ability to protect downstream reverse osmosis (RO) processes. A conventional full-scale wastewater treatment system with primary and secondary treatment followed by rotating biological contactors (RBC) and sand filtration were compared in a side-by-side study with a pilot-scale membrane bioreactor (MBR). Effluent from the two ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you