WATER MEMBRANES WHITE PAPERS AND CASE STUDIES
The Carrollton Wastewater Treatment Plant located in eastern Ohio, was upgraded from conventional activated sludge technology.
Bubble Removal From Aqueous Streams Using SuperPhobic® Membrane Contactors
Many manufacturing processes, analytical measurements, and other industrial processes and procedures that involve aqueous based solutions, are adversely affected by bubbles in the fluid stream.
Using ‘TransMembraneChemiSorption’ (TMCS) For Ammonia Removal From Industrial Waste Waters
Dissolved gases like NH3, H2S or NOx in waste water lead to contamination in the sewage system and high treatment costs for municipal waste water treatment plants.
Using Membrane Contactor Technology To Extend Resin Bed Life
In today’s economic environment when profits are reduced due to rising costs, it is necessary to find ways to save time and money.
Solve High Alkalinity With Membrane Contactors
A membrane degassing system can solve high bicarbonate alkalinity that negatively affects anion bed life.
Clarification System Boosts Capacity, Reduces Maintenance
Spikes in peak demand at the 3.0 MGD Freedom District Water Treatment Plant in Carroll County, MD, exceeded 70 percent of the plant’s capacity, and the existing clarifier made for a lengthy sludge-removal process. After staff installed a dissolved air flotation (DAF) pretreatment system to improve the efficiency of the membrane filters, the now 4.0 MGD facility has reduced maintenance for operators. The system also safeguards against pathogens that can pass through traditional sand/diatomaceous (S/D) filters.
Flat-Sheet Membrane Units Increase WWTP Capacity
Following several years of inadequate performance and intensive cleaning requirements, the owners of the Callao, VA, wastewater treatment plant looked for a solution. The installation of two flexible, flat-sheet membrane units provided an instant capacity increase and a decrease in sludge accumulation, resulting in streamlined plant operations.
Liqui-Cel® Membrane Contactors Remove Dissolved Gases From Water In Many Hydrocarbon Recovery And Process Applcations
The oil and gas industry has utilized various deaeration technologies for many years to remove dissolved gases, particularly oxygen, from injection water. Minimizing the environmental impact, improving operating efficiency, avoiding process issues and protecting system components are just a few of the reasons degassing is necessary in many hydrocarbon recovery and water processes.
Do We Have To Sacrifice Performance To Be Green?
The global use of membranes is widespread in municipal, industrial, and wastewater applications with reverse osmosis (RO) proving to be a highly effective and reliable method of advanced water treatment. Reuse applications have been particularly challenging for water treatment chemical companies as these highly variable feedwaters can contain any imaginable constituent, resulting in a wide array of site specific foulants. By Karen Lindsey, V.P. Operations, Avista Technologies, Inc.
China Power Plant Reduces Capital Costs, Energy Use With New Integrated Membrane System
As engineers come under increasing pressure to reduce maintenance and operating costs, inefficient combination double-pass reverse osmosis and electrodeionization (RO/EDI) water treatment systems have begun to lose popularity as a means of providing ultra-pure water. Integrated membrane systems (IMS), on the other hand, combine multiple membrane-based water treatment processes into a single system. In this case study, find out how a heat and power plant in Northeast China lowered capital costs and energy use by adopting an IMS to replace its conventional water treatment system.
Generating Station Maximizes Efficiency By Choosing A Membrane Decarbonation System
When dissolved carbon dioxide in the water began overloading the anion resin and decreasing capacity at its Rokeby Generating Station, Lincoln Electric Systems had to act quickly to update its winter contingency plans and meet increasing demand. In this case study, learn why the municipality chose a membrane degasifying system over chemical treatment options or a forced draft aerator, thus reducing costs and improving overall efficiency by minimizing downtime.
Development Of MBR Suitable For Retrofit With Flat Sheet Membrane
In sewage works of Japan near bay areas, the tightening of restrictions on nitrogen and phosphorus has resulted in greater needs for reconstruction and replacement of infrastructure, to switch from the conventional activated sludge process to the advanced treatment process without newly expanding aeration tanks.
Failing Lagoon System Gets New Life From MBR Retrofit The Leoni Township’s wastewater treatment plant (WWTP) serves thirteen communities across three counties including the Michigan Speedway complex.
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WATER MEMBRANES SUPPLIERS
Aqua-Aerobic Systems, Inc.
Since 1969, Aqua-Aerobic Systems, Inc. has been a leader in the design and manufacture of wastewater treatment equipment and systems for both municipal and industrial markets, worldwide.
Aquatech International Corporation For over 2 decades, Aquatech has provided industry worldwide with proven water and wastewater treatment systems|We strive to enable our customers to maximize efficiency by concentrating on their core businesses while we provide the leadership and expertise necessary in water treatment|Our mission is to utilize innovation and performance excellence to drive toward the ultimate goal--a lower overall life cycle cost of treatment
Liqui-Cel® Membrane Contactors are used for degassing liquids. They are most commonly used for O2 removal from water and CO2 removal from water, but they are also capable of controlling a variety of other dissolved gasses as well, such as Nitrogen.
Ovivo brings together more than 200 years of collected experience, process expertise and proven technologies; but that doesn’t mean that we’re complacent. Over past centuries of growth, development and refinement we have been guided by the principle of delivering value to our clients. Our equipment and technologies already have a reputation for long-term durability and reliability, offering decades of use and leading to lasting relationships with key customers.
QUA® headquartered in USA, is a developer and manufacturer of leading-edge advanced membrane products used in the water, wastewater, and water reuse markets. Sold exclusively through a global network of qualified OEM's, QUA's product offering includes their innovative Fractional Electrodeionization (FEDI®) stack, which has superior hardness tolerance compared to the other electro-deionization products on the market and their NSF Certified Q-SEP® Ultrafiltration (UF) membranes.
Evoqua Water Technologies
Evoqua Water Technologies, formerly Siemens Water Technologies, is a leader in water and wastewater treatment products, systems and services for industrial and municipal customers. We offer a wide range of proven product brands and advanced water and wastewater treatment technologies, mobile and emergency water supply solutions and service contract options.
Veolia Water Technologies
Veolia Water Technologies offers comprehensive water and wastewater solutions for industrial and municipal customers. With unique technologies and process expertise, Veolia specializes in engineering, design, and project management, construction and execution.
Water membranes are widely used in the water treatment processes. They have become a fundamental player in separation technology because of the fact that they require no additional chemicals and their relatively low energy requirements.
Water membranes have been applied during the extraction of produced water, treatment of waste/sewage water and processing of surface water all with huge success levels. Conventional water treatment techniques are over time incorporating in their processes the use on water membranes. Commercialization of membranes was first done in the 1970s and 1980s.
Membrane technology is chiefly based on the presence of pores on the membranes that make them semi-permeable. The simple principle on which water membranes work is such that the semi-permeability of water membranes ensures that only water is allowed to pass through a specific membrane while trapping unwanted particles and substances.
In both microfiltration and ultra filtration, membranes provide an effective barrier for arresting suspended solids in water.
To aid substances to penetrate across a semi-permeable membrane the following steps are undertaken: Electric potential introduction, high pressure application and ensuring that the concentration gradient on both sides of the membrane is maintained. The surface area of the membrane also determines the efficiency of the membrane in use.
The only drawback on water membranes is that they cannot remove substances that are actually dissolved in the water such as phosphorus, nitrates and heavy metal ions. The following are categories of membranes: Microfiltration (MF), Ultra filtration (UF), Reverse osmosis (RO), and Nanofiltration (NF) membranes
Ultra filtration membranes employ polymer technology with chemically created microscopic pores that trap dissolved substances therefore eliminating the possible use of any coagulants.