Water. desalination + reuse

SHOWCASE | 34 | Desalination & Water Reuse | August-September 2014 Dow anD Veolia system wins ultrafiltration Deal for floating oil proDuction unit Dow Water and Process Solutions and Veolia Water Technologies are to provide ultrafiltration (UF) technology for Total's new Moho Nord offshore floating deepwater oil production unit off the Republic of the Congo coast. A UF system designed and supplied by Veolia Water Technologies using Dow IntegraFlo UF elements will produce high-quality water for use in pressure maintenance in the subsea oil wells feeding the Moho Nord floating production unit, the companies said. Dow technology will be used in the removal of suspended solids and bacteria from 210,000 barrels of sea water a day in a pretreatment stage. Prior to injection into the oil reservoirs the pretreated water will be fed into a sulphate removal unit equipped with Dow Filmtec SR90 elements. Sulphate removal prevents reservoir scaling and souring of the oil. fluytech online-cleaning ultrafiltration cuts costs Spanish company Fluytec has launched a new continuous ultrafiltration (c-UF) system with an incorporated, online cleaning system that can reduce ultrafilitration capital costs by up to 20% the company claims. Fluytech said its new c-UF system cleans each ultrafiltration module individually while the rest of the system remains online. It has, according to Fluytech, an innovative control system to ensure a constant product flow during backwash, flushing and rinsing, as well as during chemically enhanced cleanings. The arrangement eliminates the need for backwash pumps and tanks, blowers and transfer pumps, which reduces capital costs. Unlike the company's other, more traditional UF systems which use outside-in UF membrane technology, the c-UF systems employ multibore polyether sulphone membranes that operate with an inside-out flow path. But Fluytech said it could customize its c-UF systems for use with outside-in membranes if preferred by a customer. The footprint of the skid-mounted 50 m 3 /h c-UF system is 7m 2 which the company claims is up to 50% smaller than a conventional UF system. It also offers the system with integrated reverse osmosis systems mounted on a common skid or container. Koch membrane bioreactor installeD in china Membranes and membrane filtration system manufacturer, Koch Membrane Systems, has supplied its Puron membrane bioreactor (MBR) ultrafiltration modules at a major chemical plant in Eastern China. Chemical process wastewater is treated at the plant with anoxic and aerobic processes followed by membrane filtration and reverse osmosis at a capacity of 10,000 m³/d. The MBR modules are part of a plant upgrade, undertaken to meet stringent plant water recycle requirements. Puron MBR was selected after a pilot operation revealed its better performance compared with competing products said Koch. The system is the first large application of the Puron MBR product in the chemicals industry in China. Danfoss highlights reVerse osmosis applications on new website Pump manufacturer Danfoss has launched a new website which features reverse osmosis applications of its modular axial piston pump (APP). The new site (www.ro-solutions.com) features Danfoss' modular, containerized APP along with its iSave energy recovery devices (ERDs). The iSave combines an isobaric pressure exchanger, booster pump and motor to reduce substantially its size compared with separate devices according to Danfoss. This, coupled with the APP's capacity to produce flow rates delivered by centrifugal pumps twice its size creates an exceptionally compact array the manufacturer says. The modular design of the APP makes it possible to configure multiple pump and ERD arrays; to scale pumping capacity to demand; and to configure parallel systems. "Instead of a plant becoming obsolete due to limited output, it can be turned into one of several modules that work together as a single system," says Danfoss. Ksb to launch new Dual-function butterfly ValVe Pump and valve manufacturer, KSB Group is set for a 2014 launch of its new shut-off butterfly valve, that also functions as a check valve in seawater desalination. During normal operation, valves of the Dualis series work as electro-hydraulically actuated butterfly valves with a category A tightness to ISO 5208 / EN 12266-1. In the event of a failure, the valve will close at an adjustable pre-set speed to protect pumps, water turbines and pipelines from surge pressure and backflow. It is manufactured in nominal sizes ranging from DN 500 to DN 1400 for pressure classes PN 6 to PN 40. The valve has been designed for applications in water transport, water distribution, seawater desalination and hydropower as well as in industrial cooling circuits. lanxess targets asia with seawater reVerse osmosis membranes launch Chemicals company Lanxess has targeted Asia with the addition of seawater reverse osmosis membranes to its Lewabrane range. "Adding seawater desalination capabilities to our solutions portfolio is key to Lanxess' growth. Asia is strategically important to us," said Lanxess director Alexander Scheffler. The seawater reverse osmosis products add to the company's Lewatit range of ion exchange resins and LewaPlus simulation and design software which incorporates ion exchange resin and reverse osmosis systems in water treatment plant designs. Lanxess said seawater desalination was growing in importance in Asia where water resources were becoming squeezed by growing populations and the need to end groundwater extraction methods that have contributed to urban subsidence. The company said it was "uniquely positioned" to offer integrated treatment using reverse osmosis and ion exchange as it was one of only two companies in the world to offer both technologies.

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